Recorded merge of revisions 81029 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r81029 | antoine.pitrou | 2010-05-09 16:46:46 +0200 (dim., 09 mai 2010) | 3 lines

  Untabify C files. Will watch buildbots.
........

1 files changed, 3745 insertions, 3745 deletions

diff --git a/Objects/longobject.c b/Objects/longobject.c
index 2229aed..d4b26d6 100644
--- a/Objects/longobject.c
+++ b/Objects/longobject.c
@@ -11,16 +11,16 @@
 #include <stddef.h>
 
 #ifndef NSMALLPOSINTS
-#define NSMALLPOSINTS		257
+#define NSMALLPOSINTS           257
 #endif
 #ifndef NSMALLNEGINTS
-#define NSMALLNEGINTS		5
+#define NSMALLNEGINTS           5
 #endif
 
 /* convert a PyLong of size 1, 0 or -1 to an sdigit */
-#define MEDIUM_VALUE(x) (Py_SIZE(x) < 0 ? -(sdigit)(x)->ob_digit[0] :	\
-			 (Py_SIZE(x) == 0 ? (sdigit)0 :			\
-			  (sdigit)(x)->ob_digit[0]))
+#define MEDIUM_VALUE(x) (Py_SIZE(x) < 0 ? -(sdigit)(x)->ob_digit[0] :   \
+             (Py_SIZE(x) == 0 ? (sdigit)0 :                             \
+              (sdigit)(x)->ob_digit[0]))
 #define ABS(x) ((x) < 0 ? -(x) : (x))
 
 #if NSMALLNEGINTS + NSMALLPOSINTS > 0
@@ -37,32 +37,32 @@ int quick_int_allocs, quick_neg_int_allocs;
 static PyObject *
 get_small_int(sdigit ival)
 {
-	PyObject *v = (PyObject*)(small_ints + ival + NSMALLNEGINTS);
-	Py_INCREF(v);
+    PyObject *v = (PyObject*)(small_ints + ival + NSMALLNEGINTS);
+    Py_INCREF(v);
 #ifdef COUNT_ALLOCS
-	if (ival >= 0)
-		quick_int_allocs++;
-	else
-		quick_neg_int_allocs++;
+    if (ival >= 0)
+        quick_int_allocs++;
+    else
+        quick_neg_int_allocs++;
 #endif
-	return v;
+    return v;
 }
 #define CHECK_SMALL_INT(ival) \
-	do if (-NSMALLNEGINTS <= ival && ival < NSMALLPOSINTS) { \
-		return get_small_int((sdigit)ival); \
-	} while(0)
+    do if (-NSMALLNEGINTS <= ival && ival < NSMALLPOSINTS) { \
+        return get_small_int((sdigit)ival); \
+    } while(0)
 
-static PyLongObject * 
+static PyLongObject *
 maybe_small_long(PyLongObject *v)
 {
-	if (v && ABS(Py_SIZE(v)) <= 1) {
-		sdigit ival = MEDIUM_VALUE(v);
-		if (-NSMALLNEGINTS <= ival && ival < NSMALLPOSINTS) {
-			Py_DECREF(v);
-			return (PyLongObject *)get_small_int(ival);
-		}
-	}
-	return v;
+    if (v && ABS(Py_SIZE(v)) <= 1) {
+        sdigit ival = MEDIUM_VALUE(v);
+        if (-NSMALLNEGINTS <= ival && ival < NSMALLPOSINTS) {
+            Py_DECREF(v);
+            return (PyLongObject *)get_small_int(ival);
+        }
+    }
+    return v;
 }
 #else
 #define CHECK_SMALL_INT(ival)
@@ -72,10 +72,10 @@ maybe_small_long(PyLongObject *v)
 /* If a freshly-allocated long is already shared, it must
    be a small integer, so negating it must go to PyLong_FromLong */
 #define NEGATE(x) \
-	do if (Py_REFCNT(x) == 1) Py_SIZE(x) = -Py_SIZE(x);  \
-	   else { PyObject* tmp=PyLong_FromLong(-MEDIUM_VALUE(x));  \
-		   Py_DECREF(x); (x) = (PyLongObject*)tmp; }	   \
-        while(0)
+    do if (Py_REFCNT(x) == 1) Py_SIZE(x) = -Py_SIZE(x);  \
+       else { PyObject* tmp=PyLong_FromLong(-MEDIUM_VALUE(x));  \
+           Py_DECREF(x); (x) = (PyLongObject*)tmp; }               \
+    while(0)
 /* For long multiplication, use the O(N**2) school algorithm unless
  * both operands contain more than KARATSUBA_CUTOFF digits (this
  * being an internal Python long digit, in base BASE).
@@ -96,7 +96,7 @@ maybe_small_long(PyLongObject *v)
 #define MIN(x, y) ((x) > (y) ? (y) : (x))
 
 #define SIGCHECK(PyTryBlock) \
-	if (PyErr_CheckSignals()) PyTryBlock \
+    if (PyErr_CheckSignals()) PyTryBlock \
 
 /* Normalize (remove leading zeros from) a long int object.
    Doesn't attempt to free the storage--in most cases, due to the nature
@@ -105,68 +105,68 @@ maybe_small_long(PyLongObject *v)
 static PyLongObject *
 long_normalize(register PyLongObject *v)
 {
-	Py_ssize_t j = ABS(Py_SIZE(v));
-	Py_ssize_t i = j;
-
-	while (i > 0 && v->ob_digit[i-1] == 0)
-		--i;
-	if (i != j)
-		Py_SIZE(v) = (Py_SIZE(v) < 0) ? -(i) : i;
-	return v;
+    Py_ssize_t j = ABS(Py_SIZE(v));
+    Py_ssize_t i = j;
+
+    while (i > 0 && v->ob_digit[i-1] == 0)
+        --i;
+    if (i != j)
+        Py_SIZE(v) = (Py_SIZE(v) < 0) ? -(i) : i;
+    return v;
 }
 
 /* Allocate a new long int object with size digits.
    Return NULL and set exception if we run out of memory. */
 
 #define MAX_LONG_DIGITS \
-	((PY_SSIZE_T_MAX - offsetof(PyLongObject, ob_digit))/sizeof(digit))
+    ((PY_SSIZE_T_MAX - offsetof(PyLongObject, ob_digit))/sizeof(digit))
 
 PyLongObject *
 _PyLong_New(Py_ssize_t size)
 {
-	PyLongObject *result;
-	/* Number of bytes needed is: offsetof(PyLongObject, ob_digit) +
-	   sizeof(digit)*size.  Previous incarnations of this code used
-	   sizeof(PyVarObject) instead of the offsetof, but this risks being
-	   incorrect in the presence of padding between the PyVarObject header
-	   and the digits. */
-	if (size > (Py_ssize_t)MAX_LONG_DIGITS) {
-		PyErr_SetString(PyExc_OverflowError,
-				"too many digits in integer");
-		return NULL;
-	}
-	result = PyObject_MALLOC(offsetof(PyLongObject, ob_digit) +
-				 size*sizeof(digit));
-	if (!result) {
-		PyErr_NoMemory();
-		return NULL;
-	}
-	return (PyLongObject*)PyObject_INIT_VAR(result, &PyLong_Type, size);
+    PyLongObject *result;
+    /* Number of bytes needed is: offsetof(PyLongObject, ob_digit) +
+       sizeof(digit)*size.  Previous incarnations of this code used
+       sizeof(PyVarObject) instead of the offsetof, but this risks being
+       incorrect in the presence of padding between the PyVarObject header
+       and the digits. */
+    if (size > (Py_ssize_t)MAX_LONG_DIGITS) {
+        PyErr_SetString(PyExc_OverflowError,
+                        "too many digits in integer");
+        return NULL;
+    }
+    result = PyObject_MALLOC(offsetof(PyLongObject, ob_digit) +
+                             size*sizeof(digit));
+    if (!result) {
+        PyErr_NoMemory();
+        return NULL;
+    }
+    return (PyLongObject*)PyObject_INIT_VAR(result, &PyLong_Type, size);
 }
 
 PyObject *
 _PyLong_Copy(PyLongObject *src)
 {
-	PyLongObject *result;
-	Py_ssize_t i;
-
-	assert(src != NULL);
-	i = Py_SIZE(src);
-	if (i < 0)
-		i = -(i);
-	if (i < 2) {
-		sdigit ival = src->ob_digit[0];
-		if (Py_SIZE(src) < 0)
-			ival = -ival;
-		CHECK_SMALL_INT(ival);
-	}
-	result = _PyLong_New(i);
-	if (result != NULL) {
-		Py_SIZE(result) = Py_SIZE(src);
-		while (--i >= 0)
-			result->ob_digit[i] = src->ob_digit[i];
-	}
-	return (PyObject *)result;
+    PyLongObject *result;
+    Py_ssize_t i;
+
+    assert(src != NULL);
+    i = Py_SIZE(src);
+    if (i < 0)
+        i = -(i);
+    if (i < 2) {
+        sdigit ival = src->ob_digit[0];
+        if (Py_SIZE(src) < 0)
+            ival = -ival;
+        CHECK_SMALL_INT(ival);
+    }
+    result = _PyLong_New(i);
+    if (result != NULL) {
+        Py_SIZE(result) = Py_SIZE(src);
+        while (--i >= 0)
+            result->ob_digit[i] = src->ob_digit[i];
+    }
+    return (PyObject *)result;
 }
 
 /* Create a new long int object from a C long int */
@@ -174,68 +174,68 @@ _PyLong_Copy(PyLongObject *src)
 PyObject *
 PyLong_FromLong(long ival)
 {
-	PyLongObject *v;
-	unsigned long abs_ival;
-	unsigned long t;  /* unsigned so >> doesn't propagate sign bit */
-	int ndigits = 0;
-	int sign = 1;
-
-	CHECK_SMALL_INT(ival);
-
-	if (ival < 0) {
-		/* negate: can't write this as abs_ival = -ival since that
-		   invokes undefined behaviour when ival is LONG_MIN */
-		abs_ival = 0U-(unsigned long)ival;
-		sign = -1;
-	}
-	else {
-		abs_ival = (unsigned long)ival;
-	}
-
-	/* Fast path for single-digit ints */
-	if (!(abs_ival >> PyLong_SHIFT)) {
-		v = _PyLong_New(1);
-		if (v) {
-			Py_SIZE(v) = sign;
-			v->ob_digit[0] = Py_SAFE_DOWNCAST(
-				abs_ival, unsigned long, digit);
-		}
-		return (PyObject*)v;
-	}
+    PyLongObject *v;
+    unsigned long abs_ival;
+    unsigned long t;  /* unsigned so >> doesn't propagate sign bit */
+    int ndigits = 0;
+    int sign = 1;
+
+    CHECK_SMALL_INT(ival);
+
+    if (ival < 0) {
+        /* negate: can't write this as abs_ival = -ival since that
+           invokes undefined behaviour when ival is LONG_MIN */
+        abs_ival = 0U-(unsigned long)ival;
+        sign = -1;
+    }
+    else {
+        abs_ival = (unsigned long)ival;
+    }
+
+    /* Fast path for single-digit ints */
+    if (!(abs_ival >> PyLong_SHIFT)) {
+        v = _PyLong_New(1);
+        if (v) {
+            Py_SIZE(v) = sign;
+            v->ob_digit[0] = Py_SAFE_DOWNCAST(
+                abs_ival, unsigned long, digit);
+        }
+        return (PyObject*)v;
+    }
 
 #if PyLong_SHIFT==15
-	/* 2 digits */
-	if (!(abs_ival >> 2*PyLong_SHIFT)) {
-		v = _PyLong_New(2);
-		if (v) {
-			Py_SIZE(v) = 2*sign;
-			v->ob_digit[0] = Py_SAFE_DOWNCAST(
-				abs_ival & PyLong_MASK, unsigned long, digit);
-			v->ob_digit[1] = Py_SAFE_DOWNCAST(
-			      abs_ival >> PyLong_SHIFT, unsigned long, digit);
-		}
-		return (PyObject*)v;
-	}
+    /* 2 digits */
+    if (!(abs_ival >> 2*PyLong_SHIFT)) {
+        v = _PyLong_New(2);
+        if (v) {
+            Py_SIZE(v) = 2*sign;
+            v->ob_digit[0] = Py_SAFE_DOWNCAST(
+                abs_ival & PyLong_MASK, unsigned long, digit);
+            v->ob_digit[1] = Py_SAFE_DOWNCAST(
+                  abs_ival >> PyLong_SHIFT, unsigned long, digit);
+        }
+        return (PyObject*)v;
+    }
 #endif
 
-	/* Larger numbers: loop to determine number of digits */
-	t = abs_ival;
-	while (t) {
-		++ndigits;
-		t >>= PyLong_SHIFT;
-	}
-	v = _PyLong_New(ndigits);
-	if (v != NULL) {
-		digit *p = v->ob_digit;
-		Py_SIZE(v) = ndigits*sign;
-		t = abs_ival;
-		while (t) {
-			*p++ = Py_SAFE_DOWNCAST(
-				t & PyLong_MASK, unsigned long, digit);
-			t >>= PyLong_SHIFT;
-		}
-	}
-	return (PyObject *)v;
+    /* Larger numbers: loop to determine number of digits */
+    t = abs_ival;
+    while (t) {
+        ++ndigits;
+        t >>= PyLong_SHIFT;
+    }
+    v = _PyLong_New(ndigits);
+    if (v != NULL) {
+        digit *p = v->ob_digit;
+        Py_SIZE(v) = ndigits*sign;
+        t = abs_ival;
+        while (t) {
+            *p++ = Py_SAFE_DOWNCAST(
+                t & PyLong_MASK, unsigned long, digit);
+            t >>= PyLong_SHIFT;
+        }
+    }
+    return (PyObject *)v;
 }
 
 /* Create a new long int object from a C unsigned long int */
@@ -243,28 +243,28 @@ PyLong_FromLong(long ival)
 PyObject *
 PyLong_FromUnsignedLong(unsigned long ival)
 {
-	PyLongObject *v;
-	unsigned long t;
-	int ndigits = 0;
-
-	if (ival < PyLong_BASE)
-		return PyLong_FromLong(ival);
-	/* Count the number of Python digits. */
-	t = (unsigned long)ival;
-	while (t) {
-		++ndigits;
-		t >>= PyLong_SHIFT;
-	}
-	v = _PyLong_New(ndigits);
-	if (v != NULL) {
-		digit *p = v->ob_digit;
-		Py_SIZE(v) = ndigits;
-		while (ival) {
-			*p++ = (digit)(ival & PyLong_MASK);
-			ival >>= PyLong_SHIFT;
-		}
-	}
-	return (PyObject *)v;
+    PyLongObject *v;
+    unsigned long t;
+    int ndigits = 0;
+
+    if (ival < PyLong_BASE)
+        return PyLong_FromLong(ival);
+    /* Count the number of Python digits. */
+    t = (unsigned long)ival;
+    while (t) {
+        ++ndigits;
+        t >>= PyLong_SHIFT;
+    }
+    v = _PyLong_New(ndigits);
+    if (v != NULL) {
+        digit *p = v->ob_digit;
+        Py_SIZE(v) = ndigits;
+        while (ival) {
+            *p++ = (digit)(ival & PyLong_MASK);
+            ival >>= PyLong_SHIFT;
+        }
+    }
+    return (PyObject *)v;
 }
 
 /* Create a new long int object from a C double */
@@ -272,41 +272,41 @@ PyLong_FromUnsignedLong(unsigned long ival)
 PyObject *
 PyLong_FromDouble(double dval)
 {
-	PyLongObject *v;
-	double frac;
-	int i, ndig, expo, neg;
-	neg = 0;
-	if (Py_IS_INFINITY(dval)) {
-		PyErr_SetString(PyExc_OverflowError,
-			"cannot convert float infinity to integer");
-		return NULL;
-	}
-	if (Py_IS_NAN(dval)) {
-		PyErr_SetString(PyExc_ValueError,
-			"cannot convert float NaN to integer");
-		return NULL;
-	}
-	if (dval < 0.0) {
-		neg = 1;
-		dval = -dval;
-	}
-	frac = frexp(dval, &expo); /* dval = frac*2**expo; 0.0 <= frac < 1.0 */
-	if (expo <= 0)
-		return PyLong_FromLong(0L);
-	ndig = (expo-1) / PyLong_SHIFT + 1; /* Number of 'digits' in result */
-	v = _PyLong_New(ndig);
-	if (v == NULL)
-		return NULL;
-	frac = ldexp(frac, (expo-1) % PyLong_SHIFT + 1);
-	for (i = ndig; --i >= 0; ) {
-		digit bits = (digit)frac;
-		v->ob_digit[i] = bits;
-		frac = frac - (double)bits;
-		frac = ldexp(frac, PyLong_SHIFT);
-	}
-	if (neg)
-		Py_SIZE(v) = -(Py_SIZE(v));
-	return (PyObject *)v;
+    PyLongObject *v;
+    double frac;
+    int i, ndig, expo, neg;
+    neg = 0;
+    if (Py_IS_INFINITY(dval)) {
+        PyErr_SetString(PyExc_OverflowError,
+            "cannot convert float infinity to integer");
+        return NULL;
+    }
+    if (Py_IS_NAN(dval)) {
+        PyErr_SetString(PyExc_ValueError,
+            "cannot convert float NaN to integer");
+        return NULL;
+    }
+    if (dval < 0.0) {
+        neg = 1;
+        dval = -dval;
+    }
+    frac = frexp(dval, &expo); /* dval = frac*2**expo; 0.0 <= frac < 1.0 */
+    if (expo <= 0)
+        return PyLong_FromLong(0L);
+    ndig = (expo-1) / PyLong_SHIFT + 1; /* Number of 'digits' in result */
+    v = _PyLong_New(ndig);
+    if (v == NULL)
+        return NULL;
+    frac = ldexp(frac, (expo-1) % PyLong_SHIFT + 1);
+    for (i = ndig; --i >= 0; ) {
+        digit bits = (digit)frac;
+        v->ob_digit[i] = bits;
+        frac = frac - (double)bits;
+        frac = ldexp(frac, PyLong_SHIFT);
+    }
+    if (neg)
+        Py_SIZE(v) = -(Py_SIZE(v));
+    return (PyObject *)v;
 }
 
 /* Checking for overflow in PyLong_AsLong is a PITA since C doesn't define
@@ -318,8 +318,8 @@ PyLong_FromDouble(double dval)
  * However, some other compilers warn about applying unary minus to an
  * unsigned operand.  Hence the weird "0-".
  */
-#define PY_ABS_LONG_MIN		(0-(unsigned long)LONG_MIN)
-#define PY_ABS_SSIZE_T_MIN	(0-(size_t)PY_SSIZE_T_MIN)
+#define PY_ABS_LONG_MIN         (0-(unsigned long)LONG_MIN)
+#define PY_ABS_SSIZE_T_MIN      (0-(size_t)PY_SSIZE_T_MIN)
 
 /* Get a C long int from a long int object.
    Returns -1 and sets an error condition if overflow occurs. */
@@ -327,102 +327,102 @@ PyLong_FromDouble(double dval)
 long
 PyLong_AsLongAndOverflow(PyObject *vv, int *overflow)
 {
-	/* This version by Tim Peters */
-	register PyLongObject *v;
-	unsigned long x, prev;
-	long res;
-	Py_ssize_t i;
-	int sign;
-	int do_decref = 0; /* if nb_int was called */
-
-	*overflow = 0;
-	if (vv == NULL) {
-		PyErr_BadInternalCall();
-		return -1;
-	}
-
-	if (!PyLong_Check(vv)) {
-		PyNumberMethods *nb;
-		nb = vv->ob_type->tp_as_number;
-		if (nb == NULL || nb->nb_int == NULL) {
-			PyErr_SetString(PyExc_TypeError,
-					"an integer is required");
-			return -1;
-		}
-		vv = (*nb->nb_int) (vv);
-		if (vv == NULL)
-			return -1;
-		do_decref = 1;
-		if (!PyLong_Check(vv)) {
-			Py_DECREF(vv);
-			PyErr_SetString(PyExc_TypeError,
-					"nb_int should return int object");
-			return -1;
-		}
-	}
-
-	res = -1;
-	v = (PyLongObject *)vv;
-	i = Py_SIZE(v);
-
-	switch (i) {
-	case -1:
-		res = -(sdigit)v->ob_digit[0];
-		break;
-	case 0:
-		res = 0;
-		break;
-	case 1:
-		res = v->ob_digit[0];
-		break;
-	default:
-		sign = 1;
-		x = 0;
-		if (i < 0) {
-			sign = -1;
-			i = -(i);
-		}
-		while (--i >= 0) {
-			prev = x;
-			x = (x << PyLong_SHIFT) | v->ob_digit[i];
-			if ((x >> PyLong_SHIFT) != prev) {
-				*overflow = sign;
-				goto exit;
-			}
-		}
-		/* Haven't lost any bits, but casting to long requires extra
-		 * care (see comment above).
-		 */
-		if (x <= (unsigned long)LONG_MAX) {
-			res = (long)x * sign;
-		}
-		else if (sign < 0 && x == PY_ABS_LONG_MIN) {
-			res = LONG_MIN;
-		}
-		else {
-			*overflow = sign;
-			/* res is already set to -1 */
-		}
-	}
+    /* This version by Tim Peters */
+    register PyLongObject *v;
+    unsigned long x, prev;
+    long res;
+    Py_ssize_t i;
+    int sign;
+    int do_decref = 0; /* if nb_int was called */
+
+    *overflow = 0;
+    if (vv == NULL) {
+        PyErr_BadInternalCall();
+        return -1;
+    }
+
+    if (!PyLong_Check(vv)) {
+        PyNumberMethods *nb;
+        nb = vv->ob_type->tp_as_number;
+        if (nb == NULL || nb->nb_int == NULL) {
+            PyErr_SetString(PyExc_TypeError,
+                            "an integer is required");
+            return -1;
+        }
+        vv = (*nb->nb_int) (vv);
+        if (vv == NULL)
+            return -1;
+        do_decref = 1;
+        if (!PyLong_Check(vv)) {
+            Py_DECREF(vv);
+            PyErr_SetString(PyExc_TypeError,
+                            "nb_int should return int object");
+            return -1;
+        }
+    }
+
+    res = -1;
+    v = (PyLongObject *)vv;
+    i = Py_SIZE(v);
+
+    switch (i) {
+    case -1:
+        res = -(sdigit)v->ob_digit[0];
+        break;
+    case 0:
+        res = 0;
+        break;
+    case 1:
+        res = v->ob_digit[0];
+        break;
+    default:
+        sign = 1;
+        x = 0;
+        if (i < 0) {
+            sign = -1;
+            i = -(i);
+        }
+        while (--i >= 0) {
+            prev = x;
+            x = (x << PyLong_SHIFT) | v->ob_digit[i];
+            if ((x >> PyLong_SHIFT) != prev) {
+                *overflow = sign;
+                goto exit;
+            }
+        }
+        /* Haven't lost any bits, but casting to long requires extra
+         * care (see comment above).
+         */
+        if (x <= (unsigned long)LONG_MAX) {
+            res = (long)x * sign;
+        }
+        else if (sign < 0 && x == PY_ABS_LONG_MIN) {
+            res = LONG_MIN;
+        }
+        else {
+            *overflow = sign;
+            /* res is already set to -1 */
+        }
+    }
  exit:
-	if (do_decref) {
-		Py_DECREF(vv);
-	}
-	return res;
+    if (do_decref) {
+        Py_DECREF(vv);
+    }
+    return res;
 }
 
-long 
+long
 PyLong_AsLong(PyObject *obj)
 {
-	int overflow;
-	long result = PyLong_AsLongAndOverflow(obj, &overflow);
-	if (overflow) {
-		/* XXX: could be cute and give a different 
-		   message for overflow == -1 */
-		PyErr_SetString(PyExc_OverflowError,
-				"Python int too large to convert to C long");
-	}
-	return result;
+    int overflow;
+    long result = PyLong_AsLongAndOverflow(obj, &overflow);
+    if (overflow) {
+        /* XXX: could be cute and give a different
+           message for overflow == -1 */
+        PyErr_SetString(PyExc_OverflowError,
+                        "Python int too large to convert to C long");
+    }
+    return result;
 }
 
 /* Get a Py_ssize_t from a long int object.
@@ -430,54 +430,54 @@ PyLong_AsLong(PyObject *obj)
 
 Py_ssize_t
 PyLong_AsSsize_t(PyObject *vv) {
-	register PyLongObject *v;
-	size_t x, prev;
-	Py_ssize_t i;
-	int sign;
-
-	if (vv == NULL) {
-		PyErr_BadInternalCall();
-		return -1;
-	}
-	if (!PyLong_Check(vv)) {
-		PyErr_SetString(PyExc_TypeError, "an integer is required");
-		return -1;
-	}
-
-	v = (PyLongObject *)vv;
-	i = Py_SIZE(v);
-	switch (i) {
-	case -1: return -(sdigit)v->ob_digit[0];
-	case 0: return 0;
-	case 1: return v->ob_digit[0];
-	}
-	sign = 1;
-	x = 0;
-	if (i < 0) {
-		sign = -1;
-		i = -(i);
-	}
-	while (--i >= 0) {
-		prev = x;
-		x = (x << PyLong_SHIFT) | v->ob_digit[i];
-		if ((x >> PyLong_SHIFT) != prev)
-			goto overflow;
-	}
-	/* Haven't lost any bits, but casting to a signed type requires
-	 * extra care (see comment above).
-	 */
-	if (x <= (size_t)PY_SSIZE_T_MAX) {
-		return (Py_ssize_t)x * sign;
-	}
-	else if (sign < 0 && x == PY_ABS_SSIZE_T_MIN) {
-		return PY_SSIZE_T_MIN;
-	}
-	/* else overflow */
+    register PyLongObject *v;
+    size_t x, prev;
+    Py_ssize_t i;
+    int sign;
+
+    if (vv == NULL) {
+        PyErr_BadInternalCall();
+        return -1;
+    }
+    if (!PyLong_Check(vv)) {
+        PyErr_SetString(PyExc_TypeError, "an integer is required");
+        return -1;
+    }
+
+    v = (PyLongObject *)vv;
+    i = Py_SIZE(v);
+    switch (i) {
+    case -1: return -(sdigit)v->ob_digit[0];
+    case 0: return 0;
+    case 1: return v->ob_digit[0];
+    }
+    sign = 1;
+    x = 0;
+    if (i < 0) {
+        sign = -1;
+        i = -(i);
+    }
+    while (--i >= 0) {
+        prev = x;
+        x = (x << PyLong_SHIFT) | v->ob_digit[i];
+        if ((x >> PyLong_SHIFT) != prev)
+            goto overflow;
+    }
+    /* Haven't lost any bits, but casting to a signed type requires
+     * extra care (see comment above).
+     */
+    if (x <= (size_t)PY_SSIZE_T_MAX) {
+        return (Py_ssize_t)x * sign;
+    }
+    else if (sign < 0 && x == PY_ABS_SSIZE_T_MIN) {
+        return PY_SSIZE_T_MIN;
+    }
+    /* else overflow */
 
  overflow:
-	PyErr_SetString(PyExc_OverflowError,
-			"Python int too large to convert to C ssize_t");
-	return -1;
+    PyErr_SetString(PyExc_OverflowError,
+                    "Python int too large to convert to C ssize_t");
+    return -1;
 }
 
 /* Get a C unsigned long int from a long int object.
@@ -486,41 +486,41 @@ PyLong_AsSsize_t(PyObject *vv) {
 unsigned long
 PyLong_AsUnsignedLong(PyObject *vv)
 {
-	register PyLongObject *v;
-	unsigned long x, prev;
-	Py_ssize_t i;
-
-	if (vv == NULL) {
-		PyErr_BadInternalCall();
-		return (unsigned long)-1;
-	}
-	if (!PyLong_Check(vv)) {
-		PyErr_SetString(PyExc_TypeError, "an integer is required");
-		return (unsigned long)-1;
-	}
-
-	v = (PyLongObject *)vv;
-	i = Py_SIZE(v);
-	x = 0;
-	if (i < 0) {
-		PyErr_SetString(PyExc_OverflowError,
-			   "can't convert negative value to unsigned int");
-		return (unsigned long) -1;
-	}
-	switch (i) {
-	case 0: return 0;
-	case 1: return v->ob_digit[0];
-	}
-	while (--i >= 0) {
-		prev = x;
-		x = (x << PyLong_SHIFT) | v->ob_digit[i];
-		if ((x >> PyLong_SHIFT) != prev) {
-			PyErr_SetString(PyExc_OverflowError,
-			 "python int too large to convert to C unsigned long");
-			return (unsigned long) -1;
-		}
-	}
-	return x;
+    register PyLongObject *v;
+    unsigned long x, prev;
+    Py_ssize_t i;
+
+    if (vv == NULL) {
+        PyErr_BadInternalCall();
+        return (unsigned long)-1;
+    }
+    if (!PyLong_Check(vv)) {
+        PyErr_SetString(PyExc_TypeError, "an integer is required");
+        return (unsigned long)-1;
+    }
+
+    v = (PyLongObject *)vv;
+    i = Py_SIZE(v);
+    x = 0;
+    if (i < 0) {
+        PyErr_SetString(PyExc_OverflowError,
+                   "can't convert negative value to unsigned int");
+        return (unsigned long) -1;
+    }
+    switch (i) {
+    case 0: return 0;
+    case 1: return v->ob_digit[0];
+    }
+    while (--i >= 0) {
+        prev = x;
+        x = (x << PyLong_SHIFT) | v->ob_digit[i];
+        if ((x >> PyLong_SHIFT) != prev) {
+            PyErr_SetString(PyExc_OverflowError,
+             "python int too large to convert to C unsigned long");
+            return (unsigned long) -1;
+        }
+    }
+    return x;
 }
 
 /* Get a C unsigned long int from a long int object.
@@ -529,41 +529,41 @@ PyLong_AsUnsignedLong(PyObject *vv)
 size_t
 PyLong_AsSize_t(PyObject *vv)
 {
-	register PyLongObject *v;
-	size_t x, prev;
-	Py_ssize_t i;
-
-	if (vv == NULL) {
-		PyErr_BadInternalCall();
-		return (size_t) -1;
-	}
-	if (!PyLong_Check(vv)) {
-		PyErr_SetString(PyExc_TypeError, "an integer is required");
-		return (size_t)-1;
-	}
-
-	v = (PyLongObject *)vv;
-	i = Py_SIZE(v);
-	x = 0;
-	if (i < 0) {
-		PyErr_SetString(PyExc_OverflowError,
-			   "can't convert negative value to size_t");
-		return (size_t) -1;
-	}
-	switch (i) {
-	case 0: return 0;
-	case 1: return v->ob_digit[0];
-	}
-	while (--i >= 0) {
-		prev = x;
-		x = (x << PyLong_SHIFT) | v->ob_digit[i];
-		if ((x >> PyLong_SHIFT) != prev) {
-			PyErr_SetString(PyExc_OverflowError,
-			    "Python int too large to convert to C size_t");
-			return (unsigned long) -1;
-		}
-	}
-	return x;
+    register PyLongObject *v;
+    size_t x, prev;
+    Py_ssize_t i;
+
+    if (vv == NULL) {
+        PyErr_BadInternalCall();
+        return (size_t) -1;
+    }
+    if (!PyLong_Check(vv)) {
+        PyErr_SetString(PyExc_TypeError, "an integer is required");
+        return (size_t)-1;
+    }
+
+    v = (PyLongObject *)vv;
+    i = Py_SIZE(v);
+    x = 0;
+    if (i < 0) {
+        PyErr_SetString(PyExc_OverflowError,
+                   "can't convert negative value to size_t");
+        return (size_t) -1;
+    }
+    switch (i) {
+    case 0: return 0;
+    case 1: return v->ob_digit[0];
+    }
+    while (--i >= 0) {
+        prev = x;
+        x = (x << PyLong_SHIFT) | v->ob_digit[i];
+        if ((x >> PyLong_SHIFT) != prev) {
+            PyErr_SetString(PyExc_OverflowError,
+                "Python int too large to convert to C size_t");
+            return (unsigned long) -1;
+        }
+    }
+    return x;
 }
 
 /* Get a C unsigned long int from a long int object, ignoring the high bits.
@@ -572,354 +572,354 @@ PyLong_AsSize_t(PyObject *vv)
 static unsigned long
 _PyLong_AsUnsignedLongMask(PyObject *vv)
 {
-	register PyLongObject *v;
-	unsigned long x;
-	Py_ssize_t i;
-	int sign;
-
-	if (vv == NULL || !PyLong_Check(vv)) {
-		PyErr_BadInternalCall();
-		return (unsigned long) -1;
-	}
-	v = (PyLongObject *)vv;
-	i = Py_SIZE(v);
-	switch (i) {
-	case 0: return 0;
-	case 1: return v->ob_digit[0];
-	}
-	sign = 1;
-	x = 0;
-	if (i < 0) {
-		sign = -1;
-		i = -i;
-	}
-	while (--i >= 0) {
-		x = (x << PyLong_SHIFT) | v->ob_digit[i];
-	}
-	return x * sign;
+    register PyLongObject *v;
+    unsigned long x;
+    Py_ssize_t i;
+    int sign;
+
+    if (vv == NULL || !PyLong_Check(vv)) {
+        PyErr_BadInternalCall();
+        return (unsigned long) -1;
+    }
+    v = (PyLongObject *)vv;
+    i = Py_SIZE(v);
+    switch (i) {
+    case 0: return 0;
+    case 1: return v->ob_digit[0];
+    }
+    sign = 1;
+    x = 0;
+    if (i < 0) {
+        sign = -1;
+        i = -i;
+    }
+    while (--i >= 0) {
+        x = (x << PyLong_SHIFT) | v->ob_digit[i];
+    }
+    return x * sign;
 }
 
 unsigned long
 PyLong_AsUnsignedLongMask(register PyObject *op)
 {
-	PyNumberMethods *nb;
-	PyLongObject *lo;
-	unsigned long val;
-
-	if (op && PyLong_Check(op))
-		return _PyLong_AsUnsignedLongMask(op);
-
-	if (op == NULL || (nb = op->ob_type->tp_as_number) == NULL ||
-	    nb->nb_int == NULL) {
-		PyErr_SetString(PyExc_TypeError, "an integer is required");
-		return (unsigned long)-1;
-	}
-
-	lo = (PyLongObject*) (*nb->nb_int) (op);
-	if (lo == NULL)
-		return (unsigned long)-1;
-	if (PyLong_Check(lo)) {
-		val = _PyLong_AsUnsignedLongMask((PyObject *)lo);
-		Py_DECREF(lo);
-		if (PyErr_Occurred())
-			return (unsigned long)-1;
-		return val;
-	}
-	else
-	{
-		Py_DECREF(lo);
-		PyErr_SetString(PyExc_TypeError,
-				"nb_int should return int object");
-		return (unsigned long)-1;
-	}
+    PyNumberMethods *nb;
+    PyLongObject *lo;
+    unsigned long val;
+
+    if (op && PyLong_Check(op))
+        return _PyLong_AsUnsignedLongMask(op);
+
+    if (op == NULL || (nb = op->ob_type->tp_as_number) == NULL ||
+        nb->nb_int == NULL) {
+        PyErr_SetString(PyExc_TypeError, "an integer is required");
+        return (unsigned long)-1;
+    }
+
+    lo = (PyLongObject*) (*nb->nb_int) (op);
+    if (lo == NULL)
+        return (unsigned long)-1;
+    if (PyLong_Check(lo)) {
+        val = _PyLong_AsUnsignedLongMask((PyObject *)lo);
+        Py_DECREF(lo);
+        if (PyErr_Occurred())
+            return (unsigned long)-1;
+        return val;
+    }
+    else
+    {
+        Py_DECREF(lo);
+        PyErr_SetString(PyExc_TypeError,
+                        "nb_int should return int object");
+        return (unsigned long)-1;
+    }
 }
 
 int
 _PyLong_Sign(PyObject *vv)
 {
-	PyLongObject *v = (PyLongObject *)vv;
+    PyLongObject *v = (PyLongObject *)vv;
 
-	assert(v != NULL);
-	assert(PyLong_Check(v));
+    assert(v != NULL);
+    assert(PyLong_Check(v));
 
-	return Py_SIZE(v) == 0 ? 0 : (Py_SIZE(v) < 0 ? -1 : 1);
+    return Py_SIZE(v) == 0 ? 0 : (Py_SIZE(v) < 0 ? -1 : 1);
 }
 
 size_t
 _PyLong_NumBits(PyObject *vv)
 {
-	PyLongObject *v = (PyLongObject *)vv;
-	size_t result = 0;
-	Py_ssize_t ndigits;
-
-	assert(v != NULL);
-	assert(PyLong_Check(v));
-	ndigits = ABS(Py_SIZE(v));
-	assert(ndigits == 0 || v->ob_digit[ndigits - 1] != 0);
-	if (ndigits > 0) {
-		digit msd = v->ob_digit[ndigits - 1];
-
-		result = (ndigits - 1) * PyLong_SHIFT;
-		if (result / PyLong_SHIFT != (size_t)(ndigits - 1))
-			goto Overflow;
-		do {
-			++result;
-			if (result == 0)
-				goto Overflow;
-			msd >>= 1;
-		} while (msd);
-	}
-	return result;
+    PyLongObject *v = (PyLongObject *)vv;
+    size_t result = 0;
+    Py_ssize_t ndigits;
+
+    assert(v != NULL);
+    assert(PyLong_Check(v));
+    ndigits = ABS(Py_SIZE(v));
+    assert(ndigits == 0 || v->ob_digit[ndigits - 1] != 0);
+    if (ndigits > 0) {
+        digit msd = v->ob_digit[ndigits - 1];
+
+        result = (ndigits - 1) * PyLong_SHIFT;
+        if (result / PyLong_SHIFT != (size_t)(ndigits - 1))
+            goto Overflow;
+        do {
+            ++result;
+            if (result == 0)
+                goto Overflow;
+            msd >>= 1;
+        } while (msd);
+    }
+    return result;
 
 Overflow:
-	PyErr_SetString(PyExc_OverflowError, "int has too many bits "
-			"to express in a platform size_t");
-	return (size_t)-1;
+    PyErr_SetString(PyExc_OverflowError, "int has too many bits "
+                    "to express in a platform size_t");
+    return (size_t)-1;
 }
 
 PyObject *
 _PyLong_FromByteArray(const unsigned char* bytes, size_t n,
-		      int little_endian, int is_signed)
+                      int little_endian, int is_signed)
 {
-	const unsigned char* pstartbyte;/* LSB of bytes */
-	int incr;			/* direction to move pstartbyte */
-	const unsigned char* pendbyte;	/* MSB of bytes */
-	size_t numsignificantbytes;	/* number of bytes that matter */
-	Py_ssize_t ndigits;		/* number of Python long digits */
-	PyLongObject* v;		/* result */
-	Py_ssize_t idigit = 0;		/* next free index in v->ob_digit */
-
-	if (n == 0)
-		return PyLong_FromLong(0L);
-
-	if (little_endian) {
-		pstartbyte = bytes;
-		pendbyte = bytes + n - 1;
-		incr = 1;
-	}
-	else {
-		pstartbyte = bytes + n - 1;
-		pendbyte = bytes;
-		incr = -1;
-	}
-
-	if (is_signed)
-		is_signed = *pendbyte >= 0x80;
-
-	/* Compute numsignificantbytes.  This consists of finding the most
-	   significant byte.  Leading 0 bytes are insignficant if the number
-	   is positive, and leading 0xff bytes if negative. */
-	{
-		size_t i;
-		const unsigned char* p = pendbyte;
-		const int pincr = -incr;  /* search MSB to LSB */
-		const unsigned char insignficant = is_signed ? 0xff : 0x00;
-
-		for (i = 0; i < n; ++i, p += pincr) {
-			if (*p != insignficant)
-				break;
-		}
-		numsignificantbytes = n - i;
-		/* 2's-comp is a bit tricky here, e.g. 0xff00 == -0x0100, so
-		   actually has 2 significant bytes.  OTOH, 0xff0001 ==
-		   -0x00ffff, so we wouldn't *need* to bump it there; but we
-		   do for 0xffff = -0x0001.  To be safe without bothering to
-		   check every case, bump it regardless. */
-		if (is_signed && numsignificantbytes < n)
-			++numsignificantbytes;
-	}
-
-	/* How many Python long digits do we need?  We have
-	   8*numsignificantbytes bits, and each Python long digit has
-	   PyLong_SHIFT bits, so it's the ceiling of the quotient. */
-	/* catch overflow before it happens */
-	if (numsignificantbytes > (PY_SSIZE_T_MAX - PyLong_SHIFT) / 8) {
-		PyErr_SetString(PyExc_OverflowError,
-				"byte array too long to convert to int");
-		return NULL;
-	}
-	ndigits = (numsignificantbytes * 8 + PyLong_SHIFT - 1) / PyLong_SHIFT;
-	v = _PyLong_New(ndigits);
-	if (v == NULL)
-		return NULL;
-
-	/* Copy the bits over.  The tricky parts are computing 2's-comp on
-	   the fly for signed numbers, and dealing with the mismatch between
-	   8-bit bytes and (probably) 15-bit Python digits.*/
-	{
-		size_t i;
-		twodigits carry = 1;		/* for 2's-comp calculation */
-		twodigits accum = 0;		/* sliding register */
-		unsigned int accumbits = 0; 	/* number of bits in accum */
-		const unsigned char* p = pstartbyte;
-
-		for (i = 0; i < numsignificantbytes; ++i, p += incr) {
-			twodigits thisbyte = *p;
-			/* Compute correction for 2's comp, if needed. */
-			if (is_signed) {
-				thisbyte = (0xff ^ thisbyte) + carry;
-				carry = thisbyte >> 8;
-				thisbyte &= 0xff;
-			}
-			/* Because we're going LSB to MSB, thisbyte is
-			   more significant than what's already in accum,
-			   so needs to be prepended to accum. */
-			accum |= (twodigits)thisbyte << accumbits;
-			accumbits += 8;
-			if (accumbits >= PyLong_SHIFT) {
-				/* There's enough to fill a Python digit. */
-				assert(idigit < ndigits);
-				v->ob_digit[idigit] = (digit)(accum &
-							      PyLong_MASK);
-				++idigit;
-				accum >>= PyLong_SHIFT;
-				accumbits -= PyLong_SHIFT;
-				assert(accumbits < PyLong_SHIFT);
-			}
-		}
-		assert(accumbits < PyLong_SHIFT);
-		if (accumbits) {
-			assert(idigit < ndigits);
-			v->ob_digit[idigit] = (digit)accum;
-			++idigit;
-		}
-	}
-
-	Py_SIZE(v) = is_signed ? -idigit : idigit;
-	return (PyObject *)long_normalize(v);
+    const unsigned char* pstartbyte;/* LSB of bytes */
+    int incr;                           /* direction to move pstartbyte */
+    const unsigned char* pendbyte;      /* MSB of bytes */
+    size_t numsignificantbytes;         /* number of bytes that matter */
+    Py_ssize_t ndigits;                 /* number of Python long digits */
+    PyLongObject* v;                    /* result */
+    Py_ssize_t idigit = 0;              /* next free index in v->ob_digit */
+
+    if (n == 0)
+        return PyLong_FromLong(0L);
+
+    if (little_endian) {
+        pstartbyte = bytes;
+        pendbyte = bytes + n - 1;
+        incr = 1;
+    }
+    else {
+        pstartbyte = bytes + n - 1;
+        pendbyte = bytes;
+        incr = -1;
+    }
+
+    if (is_signed)
+        is_signed = *pendbyte >= 0x80;
+
+    /* Compute numsignificantbytes.  This consists of finding the most
+       significant byte.  Leading 0 bytes are insignficant if the number
+       is positive, and leading 0xff bytes if negative. */
+    {
+        size_t i;
+        const unsigned char* p = pendbyte;
+        const int pincr = -incr;  /* search MSB to LSB */
+        const unsigned char insignficant = is_signed ? 0xff : 0x00;
+
+        for (i = 0; i < n; ++i, p += pincr) {
+            if (*p != insignficant)
+                break;
+        }
+        numsignificantbytes = n - i;
+        /* 2's-comp is a bit tricky here, e.g. 0xff00 == -0x0100, so
+           actually has 2 significant bytes.  OTOH, 0xff0001 ==
+           -0x00ffff, so we wouldn't *need* to bump it there; but we
+           do for 0xffff = -0x0001.  To be safe without bothering to
+           check every case, bump it regardless. */
+        if (is_signed && numsignificantbytes < n)
+            ++numsignificantbytes;
+    }
+
+    /* How many Python long digits do we need?  We have
+       8*numsignificantbytes bits, and each Python long digit has
+       PyLong_SHIFT bits, so it's the ceiling of the quotient. */
+    /* catch overflow before it happens */
+    if (numsignificantbytes > (PY_SSIZE_T_MAX - PyLong_SHIFT) / 8) {
+        PyErr_SetString(PyExc_OverflowError,
+                        "byte array too long to convert to int");
+        return NULL;
+    }
+    ndigits = (numsignificantbytes * 8 + PyLong_SHIFT - 1) / PyLong_SHIFT;
+    v = _PyLong_New(ndigits);
+    if (v == NULL)
+        return NULL;
+
+    /* Copy the bits over.  The tricky parts are computing 2's-comp on
+       the fly for signed numbers, and dealing with the mismatch between
+       8-bit bytes and (probably) 15-bit Python digits.*/
+    {
+        size_t i;
+        twodigits carry = 1;                    /* for 2's-comp calculation */
+        twodigits accum = 0;                    /* sliding register */
+        unsigned int accumbits = 0;             /* number of bits in accum */
+        const unsigned char* p = pstartbyte;
+
+        for (i = 0; i < numsignificantbytes; ++i, p += incr) {
+            twodigits thisbyte = *p;
+            /* Compute correction for 2's comp, if needed. */
+            if (is_signed) {
+                thisbyte = (0xff ^ thisbyte) + carry;
+                carry = thisbyte >> 8;
+                thisbyte &= 0xff;
+            }
+            /* Because we're going LSB to MSB, thisbyte is
+               more significant than what's already in accum,
+               so needs to be prepended to accum. */
+            accum |= (twodigits)thisbyte << accumbits;
+            accumbits += 8;
+            if (accumbits >= PyLong_SHIFT) {
+                /* There's enough to fill a Python digit. */
+                assert(idigit < ndigits);
+                v->ob_digit[idigit] = (digit)(accum &
+                                              PyLong_MASK);
+                ++idigit;
+                accum >>= PyLong_SHIFT;
+                accumbits -= PyLong_SHIFT;
+                assert(accumbits < PyLong_SHIFT);
+            }
+        }
+        assert(accumbits < PyLong_SHIFT);
+        if (accumbits) {
+            assert(idigit < ndigits);
+            v->ob_digit[idigit] = (digit)accum;
+            ++idigit;
+        }
+    }
+
+    Py_SIZE(v) = is_signed ? -idigit : idigit;
+    return (PyObject *)long_normalize(v);
 }
 
 int
 _PyLong_AsByteArray(PyLongObject* v,
-		    unsigned char* bytes, size_t n,
-		    int little_endian, int is_signed)
+                    unsigned char* bytes, size_t n,
+                    int little_endian, int is_signed)
 {
-	Py_ssize_t i;		/* index into v->ob_digit */
-	Py_ssize_t ndigits;		/* |v->ob_size| */
-	twodigits accum;	/* sliding register */
-	unsigned int accumbits; /* # bits in accum */
-	int do_twos_comp;	/* store 2's-comp?  is_signed and v < 0 */
-	digit carry;		/* for computing 2's-comp */
-	size_t j;		/* # bytes filled */
-	unsigned char* p;	/* pointer to next byte in bytes */
-	int pincr;		/* direction to move p */
-
-	assert(v != NULL && PyLong_Check(v));
-
-	if (Py_SIZE(v) < 0) {
-		ndigits = -(Py_SIZE(v));
-		if (!is_signed) {
-			PyErr_SetString(PyExc_OverflowError,
-				"can't convert negative int to unsigned");
-			return -1;
-		}
-		do_twos_comp = 1;
-	}
-	else {
-		ndigits = Py_SIZE(v);
-		do_twos_comp = 0;
-	}
-
-	if (little_endian) {
-		p = bytes;
-		pincr = 1;
-	}
-	else {
-		p = bytes + n - 1;
-		pincr = -1;
-	}
-
-	/* Copy over all the Python digits.
-	   It's crucial that every Python digit except for the MSD contribute
-	   exactly PyLong_SHIFT bits to the total, so first assert that the long is
-	   normalized. */
-	assert(ndigits == 0 || v->ob_digit[ndigits - 1] != 0);
-	j = 0;
-	accum = 0;
-	accumbits = 0;
-	carry = do_twos_comp ? 1 : 0;
-	for (i = 0; i < ndigits; ++i) {
-		digit thisdigit = v->ob_digit[i];
-		if (do_twos_comp) {
-			thisdigit = (thisdigit ^ PyLong_MASK) + carry;
-			carry = thisdigit >> PyLong_SHIFT;
-			thisdigit &= PyLong_MASK;
-		}
-		/* Because we're going LSB to MSB, thisdigit is more
-		   significant than what's already in accum, so needs to be
-		   prepended to accum. */
-		accum |= (twodigits)thisdigit << accumbits;
-
-		/* The most-significant digit may be (probably is) at least
-		   partly empty. */
-		if (i == ndigits - 1) {
-			/* Count # of sign bits -- they needn't be stored,
-			 * although for signed conversion we need later to
-			 * make sure at least one sign bit gets stored. */
-			digit s = do_twos_comp ? thisdigit ^ PyLong_MASK :
-				                thisdigit;
-			while (s != 0) {
-				s >>= 1;
-				accumbits++;
-			}
-		}
-		else
-			accumbits += PyLong_SHIFT;
-
-		/* Store as many bytes as possible. */
-		while (accumbits >= 8) {
-			if (j >= n)
-				goto Overflow;
-			++j;
-			*p = (unsigned char)(accum & 0xff);
-			p += pincr;
-			accumbits -= 8;
-			accum >>= 8;
-		}
-	}
-
-	/* Store the straggler (if any). */
-	assert(accumbits < 8);
-	assert(carry == 0);  /* else do_twos_comp and *every* digit was 0 */
-	if (accumbits > 0) {
-		if (j >= n)
-			goto Overflow;
-		++j;
-		if (do_twos_comp) {
-			/* Fill leading bits of the byte with sign bits
-			   (appropriately pretending that the long had an
-			   infinite supply of sign bits). */
-			accum |= (~(twodigits)0) << accumbits;
-		}
-		*p = (unsigned char)(accum & 0xff);
-		p += pincr;
-	}
-	else if (j == n && n > 0 && is_signed) {
-		/* The main loop filled the byte array exactly, so the code
-		   just above didn't get to ensure there's a sign bit, and the
-		   loop below wouldn't add one either.  Make sure a sign bit
-		   exists. */
-		unsigned char msb = *(p - pincr);
-		int sign_bit_set = msb >= 0x80;
-		assert(accumbits == 0);
-		if (sign_bit_set == do_twos_comp)
-			return 0;
-		else
-			goto Overflow;
-	}
-
-	/* Fill remaining bytes with copies of the sign bit. */
-	{
-		unsigned char signbyte = do_twos_comp ? 0xffU : 0U;
-		for ( ; j < n; ++j, p += pincr)
-			*p = signbyte;
-	}
-
-	return 0;
+    Py_ssize_t i;               /* index into v->ob_digit */
+    Py_ssize_t ndigits;                 /* |v->ob_size| */
+    twodigits accum;            /* sliding register */
+    unsigned int accumbits; /* # bits in accum */
+    int do_twos_comp;           /* store 2's-comp?  is_signed and v < 0 */
+    digit carry;                /* for computing 2's-comp */
+    size_t j;                   /* # bytes filled */
+    unsigned char* p;           /* pointer to next byte in bytes */
+    int pincr;                  /* direction to move p */
+
+    assert(v != NULL && PyLong_Check(v));
+
+    if (Py_SIZE(v) < 0) {
+        ndigits = -(Py_SIZE(v));
+        if (!is_signed) {
+            PyErr_SetString(PyExc_OverflowError,
+                "can't convert negative int to unsigned");
+            return -1;
+        }
+        do_twos_comp = 1;
+    }
+    else {
+        ndigits = Py_SIZE(v);
+        do_twos_comp = 0;
+    }
+
+    if (little_endian) {
+        p = bytes;
+        pincr = 1;
+    }
+    else {
+        p = bytes + n - 1;
+        pincr = -1;
+    }
+
+    /* Copy over all the Python digits.
+       It's crucial that every Python digit except for the MSD contribute
+       exactly PyLong_SHIFT bits to the total, so first assert that the long is
+       normalized. */
+    assert(ndigits == 0 || v->ob_digit[ndigits - 1] != 0);
+    j = 0;
+    accum = 0;
+    accumbits = 0;
+    carry = do_twos_comp ? 1 : 0;
+    for (i = 0; i < ndigits; ++i) {
+        digit thisdigit = v->ob_digit[i];
+        if (do_twos_comp) {
+            thisdigit = (thisdigit ^ PyLong_MASK) + carry;
+            carry = thisdigit >> PyLong_SHIFT;
+            thisdigit &= PyLong_MASK;
+        }
+        /* Because we're going LSB to MSB, thisdigit is more
+           significant than what's already in accum, so needs to be
+           prepended to accum. */
+        accum |= (twodigits)thisdigit << accumbits;
+
+        /* The most-significant digit may be (probably is) at least
+           partly empty. */
+        if (i == ndigits - 1) {
+            /* Count # of sign bits -- they needn't be stored,
+             * although for signed conversion we need later to
+             * make sure at least one sign bit gets stored. */
+            digit s = do_twos_comp ? thisdigit ^ PyLong_MASK :
+                        thisdigit;
+            while (s != 0) {
+                s >>= 1;
+                accumbits++;
+            }
+        }
+        else
+            accumbits += PyLong_SHIFT;
+
+        /* Store as many bytes as possible. */
+        while (accumbits >= 8) {
+            if (j >= n)
+                goto Overflow;
+            ++j;
+            *p = (unsigned char)(accum & 0xff);
+            p += pincr;
+            accumbits -= 8;
+            accum >>= 8;
+        }
+    }
+
+    /* Store the straggler (if any). */
+    assert(accumbits < 8);
+    assert(carry == 0);  /* else do_twos_comp and *every* digit was 0 */
+    if (accumbits > 0) {
+        if (j >= n)
+            goto Overflow;
+        ++j;
+        if (do_twos_comp) {
+            /* Fill leading bits of the byte with sign bits
+               (appropriately pretending that the long had an
+               infinite supply of sign bits). */
+            accum |= (~(twodigits)0) << accumbits;
+        }
+        *p = (unsigned char)(accum & 0xff);
+        p += pincr;
+    }
+    else if (j == n && n > 0 && is_signed) {
+        /* The main loop filled the byte array exactly, so the code
+           just above didn't get to ensure there's a sign bit, and the
+           loop below wouldn't add one either.  Make sure a sign bit
+           exists. */
+        unsigned char msb = *(p - pincr);
+        int sign_bit_set = msb >= 0x80;
+        assert(accumbits == 0);
+        if (sign_bit_set == do_twos_comp)
+            return 0;
+        else
+            goto Overflow;
+    }
+
+    /* Fill remaining bytes with copies of the sign bit. */
+    {
+        unsigned char signbyte = do_twos_comp ? 0xffU : 0U;
+        for ( ; j < n; ++j, p += pincr)
+            *p = signbyte;
+    }
+
+    return 0;
 
 Overflow:
-	PyErr_SetString(PyExc_OverflowError, "int too big to convert");
-	return -1;
+    PyErr_SetString(PyExc_OverflowError, "int too big to convert");
+    return -1;
 
 }
 
@@ -934,10 +934,10 @@ PyLong_FromVoidPtr(void *p)
 #if SIZEOF_LONG_LONG < SIZEOF_VOID_P
 #   error "PyLong_FromVoidPtr: sizeof(PY_LONG_LONG) < sizeof(void*)"
 #endif
-	/* special-case null pointer */
-	if (!p)
-		return PyLong_FromLong(0);
-	return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG)(Py_uintptr_t)p);
+    /* special-case null pointer */
+    if (!p)
+        return PyLong_FromLong(0);
+    return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG)(Py_uintptr_t)p);
 
 }
 
@@ -946,17 +946,17 @@ PyLong_FromVoidPtr(void *p)
 void *
 PyLong_AsVoidPtr(PyObject *vv)
 {
-	/* This function will allow int or long objects. If vv is neither,
-	   then the PyLong_AsLong*() functions will raise the exception:
-	   PyExc_SystemError, "bad argument to internal function"
-	*/
+    /* This function will allow int or long objects. If vv is neither,
+       then the PyLong_AsLong*() functions will raise the exception:
+       PyExc_SystemError, "bad argument to internal function"
+    */
 #if SIZEOF_VOID_P <= SIZEOF_LONG
-	long x;
+    long x;
 
-	if (PyLong_Check(vv) && _PyLong_Sign(vv) < 0)
-		x = PyLong_AsLong(vv);
-	else
-		x = PyLong_AsUnsignedLong(vv);
+    if (PyLong_Check(vv) && _PyLong_Sign(vv) < 0)
+        x = PyLong_AsLong(vv);
+    else
+        x = PyLong_AsUnsignedLong(vv);
 #else
 
 #ifndef HAVE_LONG_LONG
@@ -965,18 +965,18 @@ PyLong_AsVoidPtr(PyObject *vv)
 #if SIZEOF_LONG_LONG < SIZEOF_VOID_P
 #   error "PyLong_AsVoidPtr: sizeof(PY_LONG_LONG) < sizeof(void*)"
 #endif
-	PY_LONG_LONG x;
+    PY_LONG_LONG x;
 
-	if (PyLong_Check(vv) && _PyLong_Sign(vv) < 0)
-		x = PyLong_AsLongLong(vv);
-	else
-		x = PyLong_AsUnsignedLongLong(vv);
+    if (PyLong_Check(vv) && _PyLong_Sign(vv) < 0)
+        x = PyLong_AsLongLong(vv);
+    else
+        x = PyLong_AsUnsignedLongLong(vv);
 
 #endif /* SIZEOF_VOID_P <= SIZEOF_LONG */
 
-	if (x == -1 && PyErr_Occurred())
-		return NULL;
-	return (void *)x;
+    if (x == -1 && PyErr_Occurred())
+        return NULL;
+    return (void *)x;
 }
 
 #ifdef HAVE_LONG_LONG
@@ -986,50 +986,50 @@ PyLong_AsVoidPtr(PyObject *vv)
  */
 
 #define IS_LITTLE_ENDIAN (int)*(unsigned char*)&one
-#define PY_ABS_LLONG_MIN	(0-(unsigned PY_LONG_LONG)PY_LLONG_MIN)
+#define PY_ABS_LLONG_MIN        (0-(unsigned PY_LONG_LONG)PY_LLONG_MIN)
 
 /* Create a new long int object from a C PY_LONG_LONG int. */
 
 PyObject *
 PyLong_FromLongLong(PY_LONG_LONG ival)
 {
-	PyLongObject *v;
-	unsigned PY_LONG_LONG abs_ival;
-	unsigned PY_LONG_LONG t;  /* unsigned so >> doesn't propagate sign bit */
-	int ndigits = 0;
-	int negative = 0;
-
-	CHECK_SMALL_INT(ival);
-	if (ival < 0) {
-		/* avoid signed overflow on negation;  see comments
-		   in PyLong_FromLong above. */
-		abs_ival = (unsigned PY_LONG_LONG)(-1-ival) + 1;
-		negative = 1;
-	}
-	else {
-		abs_ival = (unsigned PY_LONG_LONG)ival;
-	}
-
-	/* Count the number of Python digits.
-	   We used to pick 5 ("big enough for anything"), but that's a
-	   waste of time and space given that 5*15 = 75 bits are rarely
-	   needed. */
-	t = abs_ival;
-	while (t) {
-		++ndigits;
-		t >>= PyLong_SHIFT;
-	}
-	v = _PyLong_New(ndigits);
-	if (v != NULL) {
-		digit *p = v->ob_digit;
-		Py_SIZE(v) = negative ? -ndigits : ndigits;
-		t = abs_ival;
-		while (t) {
-			*p++ = (digit)(t & PyLong_MASK);
-			t >>= PyLong_SHIFT;
-		}
-	}
-	return (PyObject *)v;
+    PyLongObject *v;
+    unsigned PY_LONG_LONG abs_ival;
+    unsigned PY_LONG_LONG t;  /* unsigned so >> doesn't propagate sign bit */
+    int ndigits = 0;
+    int negative = 0;
+
+    CHECK_SMALL_INT(ival);
+    if (ival < 0) {
+        /* avoid signed overflow on negation;  see comments
+           in PyLong_FromLong above. */
+        abs_ival = (unsigned PY_LONG_LONG)(-1-ival) + 1;
+        negative = 1;
+    }
+    else {
+        abs_ival = (unsigned PY_LONG_LONG)ival;
+    }
+
+    /* Count the number of Python digits.
+       We used to pick 5 ("big enough for anything"), but that's a
+       waste of time and space given that 5*15 = 75 bits are rarely
+       needed. */
+    t = abs_ival;
+    while (t) {
+        ++ndigits;
+        t >>= PyLong_SHIFT;
+    }
+    v = _PyLong_New(ndigits);
+    if (v != NULL) {
+        digit *p = v->ob_digit;
+        Py_SIZE(v) = negative ? -ndigits : ndigits;
+        t = abs_ival;
+        while (t) {
+            *p++ = (digit)(t & PyLong_MASK);
+            t >>= PyLong_SHIFT;
+        }
+    }
+    return (PyObject *)v;
 }
 
 /* Create a new long int object from a C unsigned PY_LONG_LONG int. */
@@ -1037,28 +1037,28 @@ PyLong_FromLongLong(PY_LONG_LONG ival)
 PyObject *
 PyLong_FromUnsignedLongLong(unsigned PY_LONG_LONG ival)
 {
-	PyLongObject *v;
-	unsigned PY_LONG_LONG t;
-	int ndigits = 0;
-
-	if (ival < PyLong_BASE)
-		return PyLong_FromLong((long)ival);
-	/* Count the number of Python digits. */
-	t = (unsigned PY_LONG_LONG)ival;
-	while (t) {
-		++ndigits;
-		t >>= PyLong_SHIFT;
-	}
-	v = _PyLong_New(ndigits);
-	if (v != NULL) {
-		digit *p = v->ob_digit;
-		Py_SIZE(v) = ndigits;
-		while (ival) {
-			*p++ = (digit)(ival & PyLong_MASK);
-			ival >>= PyLong_SHIFT;
-		}
-	}
-	return (PyObject *)v;
+    PyLongObject *v;
+    unsigned PY_LONG_LONG t;
+    int ndigits = 0;
+
+    if (ival < PyLong_BASE)
+        return PyLong_FromLong((long)ival);
+    /* Count the number of Python digits. */
+    t = (unsigned PY_LONG_LONG)ival;
+    while (t) {
+        ++ndigits;
+        t >>= PyLong_SHIFT;
+    }
+    v = _PyLong_New(ndigits);
+    if (v != NULL) {
+        digit *p = v->ob_digit;
+        Py_SIZE(v) = ndigits;
+        while (ival) {
+            *p++ = (digit)(ival & PyLong_MASK);
+            ival >>= PyLong_SHIFT;
+        }
+    }
+    return (PyObject *)v;
 }
 
 /* Create a new long int object from a C Py_ssize_t. */
@@ -1066,39 +1066,39 @@ PyLong_FromUnsignedLongLong(unsigned PY_LONG_LONG ival)
 PyObject *
 PyLong_FromSsize_t(Py_ssize_t ival)
 {
-	PyLongObject *v;
-	size_t abs_ival;
-	size_t t;  /* unsigned so >> doesn't propagate sign bit */
-	int ndigits = 0;
-	int negative = 0;
-
-	CHECK_SMALL_INT(ival);
-	if (ival < 0) {
-		/* avoid signed overflow when ival = SIZE_T_MIN */
-		abs_ival = (size_t)(-1-ival)+1;
-		negative = 1;
-	}
-	else {
-		abs_ival = (size_t)ival;
-	}
-
-	/* Count the number of Python digits. */
-	t = abs_ival;
-	while (t) {
-		++ndigits;
-		t >>= PyLong_SHIFT;
-	}
-	v = _PyLong_New(ndigits);
-	if (v != NULL) {
-		digit *p = v->ob_digit;
-		Py_SIZE(v) = negative ? -ndigits : ndigits;
-		t = abs_ival;
-		while (t) {
-			*p++ = (digit)(t & PyLong_MASK);
-			t >>= PyLong_SHIFT;
-		}
-	}
-	return (PyObject *)v;
+    PyLongObject *v;
+    size_t abs_ival;
+    size_t t;  /* unsigned so >> doesn't propagate sign bit */
+    int ndigits = 0;
+    int negative = 0;
+
+    CHECK_SMALL_INT(ival);
+    if (ival < 0) {
+        /* avoid signed overflow when ival = SIZE_T_MIN */
+        abs_ival = (size_t)(-1-ival)+1;
+        negative = 1;
+    }
+    else {
+        abs_ival = (size_t)ival;
+    }
+
+    /* Count the number of Python digits. */
+    t = abs_ival;
+    while (t) {
+        ++ndigits;
+        t >>= PyLong_SHIFT;
+    }
+    v = _PyLong_New(ndigits);
+    if (v != NULL) {
+        digit *p = v->ob_digit;
+        Py_SIZE(v) = negative ? -ndigits : ndigits;
+        t = abs_ival;
+        while (t) {
+            *p++ = (digit)(t & PyLong_MASK);
+            t >>= PyLong_SHIFT;
+        }
+    }
+    return (PyObject *)v;
 }
 
 /* Create a new long int object from a C size_t. */
@@ -1106,28 +1106,28 @@ PyLong_FromSsize_t(Py_ssize_t ival)
 PyObject *
 PyLong_FromSize_t(size_t ival)
 {
-	PyLongObject *v;
-	size_t t;
-	int ndigits = 0;
-
-	if (ival < PyLong_BASE)
-		return PyLong_FromLong((long)ival);
-	/* Count the number of Python digits. */
-	t = ival;
-	while (t) {
-		++ndigits;
-		t >>= PyLong_SHIFT;
-	}
-	v = _PyLong_New(ndigits);
-	if (v != NULL) {
-		digit *p = v->ob_digit;
-		Py_SIZE(v) = ndigits;
-		while (ival) {
-			*p++ = (digit)(ival & PyLong_MASK);
-			ival >>= PyLong_SHIFT;
-		}
-	}
-	return (PyObject *)v;
+    PyLongObject *v;
+    size_t t;
+    int ndigits = 0;
+
+    if (ival < PyLong_BASE)
+        return PyLong_FromLong((long)ival);
+    /* Count the number of Python digits. */
+    t = ival;
+    while (t) {
+        ++ndigits;
+        t >>= PyLong_SHIFT;
+    }
+    v = _PyLong_New(ndigits);
+    if (v != NULL) {
+        digit *p = v->ob_digit;
+        Py_SIZE(v) = ndigits;
+        while (ival) {
+            *p++ = (digit)(ival & PyLong_MASK);
+            ival >>= PyLong_SHIFT;
+        }
+    }
+    return (PyObject *)v;
 }
 
 /* Get a C PY_LONG_LONG int from a long int object.
@@ -1136,51 +1136,51 @@ PyLong_FromSize_t(size_t ival)
 PY_LONG_LONG
 PyLong_AsLongLong(PyObject *vv)
 {
-	PyLongObject *v;
-	PY_LONG_LONG bytes;
-	int one = 1;
-	int res;
-
-	if (vv == NULL) {
-		PyErr_BadInternalCall();
-		return -1;
-	}
-	if (!PyLong_Check(vv)) {
-		PyNumberMethods *nb;
-		PyObject *io;
-		if ((nb = vv->ob_type->tp_as_number) == NULL ||
-		    nb->nb_int == NULL) {
-			PyErr_SetString(PyExc_TypeError, "an integer is required");
-			return -1;
-		}
-		io = (*nb->nb_int) (vv);
-		if (io == NULL)
-			return -1;
-		if (PyLong_Check(io)) {
-			bytes = PyLong_AsLongLong(io);
-			Py_DECREF(io);
-			return bytes;
-		}
-		Py_DECREF(io);
-		PyErr_SetString(PyExc_TypeError, "integer conversion failed");
-		return -1;
-	}
-
-	v = (PyLongObject*)vv;
-	switch(Py_SIZE(v)) {
-	case -1: return -(sdigit)v->ob_digit[0];
-	case 0: return 0;
-	case 1: return v->ob_digit[0];
-	}
-	res = _PyLong_AsByteArray(
-			(PyLongObject *)vv, (unsigned char *)&bytes,
-			SIZEOF_LONG_LONG, IS_LITTLE_ENDIAN, 1);
-
-	/* Plan 9 can't handle PY_LONG_LONG in ? : expressions */
-	if (res < 0)
-		return (PY_LONG_LONG)-1;
-	else
-		return bytes;
+    PyLongObject *v;
+    PY_LONG_LONG bytes;
+    int one = 1;
+    int res;
+
+    if (vv == NULL) {
+        PyErr_BadInternalCall();
+        return -1;
+    }
+    if (!PyLong_Check(vv)) {
+        PyNumberMethods *nb;
+        PyObject *io;
+        if ((nb = vv->ob_type->tp_as_number) == NULL ||
+            nb->nb_int == NULL) {
+            PyErr_SetString(PyExc_TypeError, "an integer is required");
+            return -1;
+        }
+        io = (*nb->nb_int) (vv);
+        if (io == NULL)
+            return -1;
+        if (PyLong_Check(io)) {
+            bytes = PyLong_AsLongLong(io);
+            Py_DECREF(io);
+            return bytes;
+        }
+        Py_DECREF(io);
+        PyErr_SetString(PyExc_TypeError, "integer conversion failed");
+        return -1;
+    }
+
+    v = (PyLongObject*)vv;
+    switch(Py_SIZE(v)) {
+    case -1: return -(sdigit)v->ob_digit[0];
+    case 0: return 0;
+    case 1: return v->ob_digit[0];
+    }
+    res = _PyLong_AsByteArray(
+                    (PyLongObject *)vv, (unsigned char *)&bytes,
+                    SIZEOF_LONG_LONG, IS_LITTLE_ENDIAN, 1);
+
+    /* Plan 9 can't handle PY_LONG_LONG in ? : expressions */
+    if (res < 0)
+        return (PY_LONG_LONG)-1;
+    else
+        return bytes;
 }
 
 /* Get a C unsigned PY_LONG_LONG int from a long int object.
@@ -1189,31 +1189,31 @@ PyLong_AsLongLong(PyObject *vv)
 unsigned PY_LONG_LONG
 PyLong_AsUnsignedLongLong(PyObject *vv)
 {
-	PyLongObject *v;
-	unsigned PY_LONG_LONG bytes;
-	int one = 1;
-	int res;
-
-	if (vv == NULL || !PyLong_Check(vv)) {
-		PyErr_BadInternalCall();
-		return (unsigned PY_LONG_LONG)-1;
-	}
-
-	v = (PyLongObject*)vv;
-	switch(Py_SIZE(v)) {
-	case 0: return 0;
-	case 1: return v->ob_digit[0];
-	}
-
-	res = _PyLong_AsByteArray(
-			(PyLongObject *)vv, (unsigned char *)&bytes,
-			SIZEOF_LONG_LONG, IS_LITTLE_ENDIAN, 0);
-
-	/* Plan 9 can't handle PY_LONG_LONG in ? : expressions */
-	if (res < 0)
-		return (unsigned PY_LONG_LONG)res;
-	else
-		return bytes;
+    PyLongObject *v;
+    unsigned PY_LONG_LONG bytes;
+    int one = 1;
+    int res;
+
+    if (vv == NULL || !PyLong_Check(vv)) {
+        PyErr_BadInternalCall();
+        return (unsigned PY_LONG_LONG)-1;
+    }
+
+    v = (PyLongObject*)vv;
+    switch(Py_SIZE(v)) {
+    case 0: return 0;
+    case 1: return v->ob_digit[0];
+    }
+
+    res = _PyLong_AsByteArray(
+                    (PyLongObject *)vv, (unsigned char *)&bytes,
+                    SIZEOF_LONG_LONG, IS_LITTLE_ENDIAN, 0);
+
+    /* Plan 9 can't handle PY_LONG_LONG in ? : expressions */
+    if (res < 0)
+        return (unsigned PY_LONG_LONG)res;
+    else
+        return bytes;
 }
 
 /* Get a C unsigned long int from a long int object, ignoring the high bits.
@@ -1222,66 +1222,66 @@ PyLong_AsUnsignedLongLong(PyObject *vv)
 static unsigned PY_LONG_LONG
 _PyLong_AsUnsignedLongLongMask(PyObject *vv)
 {
-	register PyLongObject *v;
-	unsigned PY_LONG_LONG x;
-	Py_ssize_t i;
-	int sign;
-
-	if (vv == NULL || !PyLong_Check(vv)) {
-		PyErr_BadInternalCall();
-		return (unsigned long) -1;
-	}
-	v = (PyLongObject *)vv;
-	switch(Py_SIZE(v)) {
-	case 0: return 0;
-	case 1: return v->ob_digit[0];
-	}
-	i = Py_SIZE(v);
-	sign = 1;
-	x = 0;
-	if (i < 0) {
-		sign = -1;
-		i = -i;
-	}
-	while (--i >= 0) {
-		x = (x << PyLong_SHIFT) | v->ob_digit[i];
-	}
-	return x * sign;
+    register PyLongObject *v;
+    unsigned PY_LONG_LONG x;
+    Py_ssize_t i;
+    int sign;
+
+    if (vv == NULL || !PyLong_Check(vv)) {
+        PyErr_BadInternalCall();
+        return (unsigned long) -1;
+    }
+    v = (PyLongObject *)vv;
+    switch(Py_SIZE(v)) {
+    case 0: return 0;
+    case 1: return v->ob_digit[0];
+    }
+    i = Py_SIZE(v);
+    sign = 1;
+    x = 0;
+    if (i < 0) {
+        sign = -1;
+        i = -i;
+    }
+    while (--i >= 0) {
+        x = (x << PyLong_SHIFT) | v->ob_digit[i];
+    }
+    return x * sign;
 }
 
 unsigned PY_LONG_LONG
 PyLong_AsUnsignedLongLongMask(register PyObject *op)
 {
-	PyNumberMethods *nb;
-	PyLongObject *lo;
-	unsigned PY_LONG_LONG val;
-
-	if (op && PyLong_Check(op))
-		return _PyLong_AsUnsignedLongLongMask(op);
-
-	if (op == NULL || (nb = op->ob_type->tp_as_number) == NULL ||
-	    nb->nb_int == NULL) {
-		PyErr_SetString(PyExc_TypeError, "an integer is required");
-		return (unsigned PY_LONG_LONG)-1;
-	}
-
-	lo = (PyLongObject*) (*nb->nb_int) (op);
-	if (lo == NULL)
-		return (unsigned PY_LONG_LONG)-1;
-	if (PyLong_Check(lo)) {
-		val = _PyLong_AsUnsignedLongLongMask((PyObject *)lo);
-		Py_DECREF(lo);
-		if (PyErr_Occurred())
-			return (unsigned PY_LONG_LONG)-1;
-		return val;
-	}
-	else
-	{
-		Py_DECREF(lo);
-		PyErr_SetString(PyExc_TypeError,
-				"nb_int should return int object");
-		return (unsigned PY_LONG_LONG)-1;
-	}
+    PyNumberMethods *nb;
+    PyLongObject *lo;
+    unsigned PY_LONG_LONG val;
+
+    if (op && PyLong_Check(op))
+        return _PyLong_AsUnsignedLongLongMask(op);
+
+    if (op == NULL || (nb = op->ob_type->tp_as_number) == NULL ||
+        nb->nb_int == NULL) {
+        PyErr_SetString(PyExc_TypeError, "an integer is required");
+        return (unsigned PY_LONG_LONG)-1;
+    }
+
+    lo = (PyLongObject*) (*nb->nb_int) (op);
+    if (lo == NULL)
+        return (unsigned PY_LONG_LONG)-1;
+    if (PyLong_Check(lo)) {
+        val = _PyLong_AsUnsignedLongLongMask((PyObject *)lo);
+        Py_DECREF(lo);
+        if (PyErr_Occurred())
+            return (unsigned PY_LONG_LONG)-1;
+        return val;
+    }
+    else
+    {
+        Py_DECREF(lo);
+        PyErr_SetString(PyExc_TypeError,
+                        "nb_int should return int object");
+        return (unsigned PY_LONG_LONG)-1;
+    }
 }
 #undef IS_LITTLE_ENDIAN
 
@@ -1296,116 +1296,116 @@ PyLong_AsUnsignedLongLongMask(register PyObject *op)
 PY_LONG_LONG
 PyLong_AsLongLongAndOverflow(PyObject *vv, int *overflow)
 {
-	/* This version by Tim Peters */
-	register PyLongObject *v;
-	unsigned PY_LONG_LONG x, prev;
-	PY_LONG_LONG res;
-	Py_ssize_t i;
-	int sign;
-	int do_decref = 0; /* if nb_int was called */
-
-	*overflow = 0;
-	if (vv == NULL) {
-		PyErr_BadInternalCall();
-		return -1;
-	}
-
-	if (!PyLong_Check(vv)) {
-		PyNumberMethods *nb;
-		nb = vv->ob_type->tp_as_number;
-		if (nb == NULL || nb->nb_int == NULL) {
-			PyErr_SetString(PyExc_TypeError,
-					"an integer is required");
-			return -1;
-		}
-		vv = (*nb->nb_int) (vv);
-		if (vv == NULL)
-			return -1;
-		do_decref = 1;
-		if (!PyLong_Check(vv)) {
-			Py_DECREF(vv);
-			PyErr_SetString(PyExc_TypeError,
-					"nb_int should return int object");
-			return -1;
-		}
-	}
-
-	res = -1;
-	v = (PyLongObject *)vv;
-	i = Py_SIZE(v);
-
-	switch (i) {
-	case -1:
-		res = -(sdigit)v->ob_digit[0];
-		break;
-	case 0:
-		res = 0;
-		break;
-	case 1:
-		res = v->ob_digit[0];
-		break;
-	default:
-		sign = 1;
-		x = 0;
-		if (i < 0) {
-			sign = -1;
-			i = -(i);
-		}
-		while (--i >= 0) {
-			prev = x;
-			x = (x << PyLong_SHIFT) + v->ob_digit[i];
-			if ((x >> PyLong_SHIFT) != prev) {
-				*overflow = sign;
-				goto exit;
-			}
-		}
-		/* Haven't lost any bits, but casting to long requires extra
-		 * care (see comment above).
-		 */
-		if (x <= (unsigned PY_LONG_LONG)PY_LLONG_MAX) {
-			res = (PY_LONG_LONG)x * sign;
-		}
-		else if (sign < 0 && x == PY_ABS_LLONG_MIN) {
-			res = PY_LLONG_MIN;
-		}
-		else {
-			*overflow = sign;
-			/* res is already set to -1 */
-		}
-	}
+    /* This version by Tim Peters */
+    register PyLongObject *v;
+    unsigned PY_LONG_LONG x, prev;
+    PY_LONG_LONG res;
+    Py_ssize_t i;
+    int sign;
+    int do_decref = 0; /* if nb_int was called */
+
+    *overflow = 0;
+    if (vv == NULL) {
+        PyErr_BadInternalCall();
+        return -1;
+    }
+
+    if (!PyLong_Check(vv)) {
+        PyNumberMethods *nb;
+        nb = vv->ob_type->tp_as_number;
+        if (nb == NULL || nb->nb_int == NULL) {
+            PyErr_SetString(PyExc_TypeError,
+                            "an integer is required");
+            return -1;
+        }
+        vv = (*nb->nb_int) (vv);
+        if (vv == NULL)
+            return -1;
+        do_decref = 1;
+        if (!PyLong_Check(vv)) {
+            Py_DECREF(vv);
+            PyErr_SetString(PyExc_TypeError,
+                            "nb_int should return int object");
+            return -1;
+        }
+    }
+
+    res = -1;
+    v = (PyLongObject *)vv;
+    i = Py_SIZE(v);
+
+    switch (i) {
+    case -1:
+        res = -(sdigit)v->ob_digit[0];
+        break;
+    case 0:
+        res = 0;
+        break;
+    case 1:
+        res = v->ob_digit[0];
+        break;
+    default:
+        sign = 1;
+        x = 0;
+        if (i < 0) {
+            sign = -1;
+            i = -(i);
+        }
+        while (--i >= 0) {
+            prev = x;
+            x = (x << PyLong_SHIFT) + v->ob_digit[i];
+            if ((x >> PyLong_SHIFT) != prev) {
+                *overflow = sign;
+                goto exit;
+            }
+        }
+        /* Haven't lost any bits, but casting to long requires extra
+         * care (see comment above).
+         */
+        if (x <= (unsigned PY_LONG_LONG)PY_LLONG_MAX) {
+            res = (PY_LONG_LONG)x * sign;
+        }
+        else if (sign < 0 && x == PY_ABS_LLONG_MIN) {
+            res = PY_LLONG_MIN;
+        }
+        else {
+            *overflow = sign;
+            /* res is already set to -1 */
+        }
+    }
  exit:
-	if (do_decref) {
-		Py_DECREF(vv);
-	}
-	return res;
+    if (do_decref) {
+        Py_DECREF(vv);
+    }
+    return res;
 }
 
 #endif /* HAVE_LONG_LONG */
 
 #define CHECK_BINOP(v,w) \
-	if (!PyLong_Check(v) || !PyLong_Check(w)) { \
-		Py_INCREF(Py_NotImplemented); \
-		return Py_NotImplemented; \
-	}
+    if (!PyLong_Check(v) || !PyLong_Check(w)) { \
+        Py_INCREF(Py_NotImplemented); \
+        return Py_NotImplemented; \
+    }
 
 /* bits_in_digit(d) returns the unique integer k such that 2**(k-1) <= d <
    2**k if d is nonzero, else 0. */
 
 static const unsigned char BitLengthTable[32] = {
-	0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
-	5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
+    0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
+    5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
 };
 
 static int
 bits_in_digit(digit d)
 {
-	int d_bits = 0;
-	while (d >= 32) {
-		d_bits += 6;
-		d >>= 6;
-	}
-	d_bits += (int)BitLengthTable[d];
-	return d_bits;
+    int d_bits = 0;
+    while (d >= 32) {
+        d_bits += 6;
+        d >>= 6;
+    }
+    d_bits += (int)BitLengthTable[d];
+    return d_bits;
 }
 
 /* x[0:m] and y[0:n] are digit vectors, LSD first, m >= n required.  x[0:n]
@@ -1415,23 +1415,23 @@ bits_in_digit(digit d)
 static digit
 v_iadd(digit *x, Py_ssize_t m, digit *y, Py_ssize_t n)
 {
-	Py_ssize_t i;
-	digit carry = 0;
-
-	assert(m >= n);
-	for (i = 0; i < n; ++i) {
-		carry += x[i] + y[i];
-		x[i] = carry & PyLong_MASK;
-		carry >>= PyLong_SHIFT;
-		assert((carry & 1) == carry);
-	}
-	for (; carry && i < m; ++i) {
-		carry += x[i];
-		x[i] = carry & PyLong_MASK;
-		carry >>= PyLong_SHIFT;
-		assert((carry & 1) == carry);
-	}
-	return carry;
+    Py_ssize_t i;
+    digit carry = 0;
+
+    assert(m >= n);
+    for (i = 0; i < n; ++i) {
+        carry += x[i] + y[i];
+        x[i] = carry & PyLong_MASK;
+        carry >>= PyLong_SHIFT;
+        assert((carry & 1) == carry);
+    }
+    for (; carry && i < m; ++i) {
+        carry += x[i];
+        x[i] = carry & PyLong_MASK;
+        carry >>= PyLong_SHIFT;
+        assert((carry & 1) == carry);
+    }
+    return carry;
 }
 
 /* x[0:m] and y[0:n] are digit vectors, LSD first, m >= n required.  x[0:n]
@@ -1441,23 +1441,23 @@ v_iadd(digit *x, Py_ssize_t m, digit *y, Py_ssize_t n)
 static digit
 v_isub(digit *x, Py_ssize_t m, digit *y, Py_ssize_t n)
 {
-	Py_ssize_t i;
-	digit borrow = 0;
-
-	assert(m >= n);
-	for (i = 0; i < n; ++i) {
-		borrow = x[i] - y[i] - borrow;
-		x[i] = borrow & PyLong_MASK;
-		borrow >>= PyLong_SHIFT;
-		borrow &= 1;	/* keep only 1 sign bit */
-	}
-	for (; borrow && i < m; ++i) {
-		borrow = x[i] - borrow;
-		x[i] = borrow & PyLong_MASK;
-		borrow >>= PyLong_SHIFT;
-		borrow &= 1;
-	}
-	return borrow;
+    Py_ssize_t i;
+    digit borrow = 0;
+
+    assert(m >= n);
+    for (i = 0; i < n; ++i) {
+        borrow = x[i] - y[i] - borrow;
+        x[i] = borrow & PyLong_MASK;
+        borrow >>= PyLong_SHIFT;
+        borrow &= 1;            /* keep only 1 sign bit */
+    }
+    for (; borrow && i < m; ++i) {
+        borrow = x[i] - borrow;
+        x[i] = borrow & PyLong_MASK;
+        borrow >>= PyLong_SHIFT;
+        borrow &= 1;
+    }
+    return borrow;
 }
 
 /* Shift digit vector a[0:m] d bits left, with 0 <= d < PyLong_SHIFT.  Put
@@ -1466,16 +1466,16 @@ v_isub(digit *x, Py_ssize_t m, digit *y, Py_ssize_t n)
 static digit
 v_lshift(digit *z, digit *a, Py_ssize_t m, int d)
 {
-	Py_ssize_t i;
-	digit carry = 0;
-
-	assert(0 <= d && d < PyLong_SHIFT);
-	for (i=0; i < m; i++) {
-		twodigits acc = (twodigits)a[i] << d | carry;
-		z[i] = (digit)acc & PyLong_MASK;
-		carry = (digit)(acc >> PyLong_SHIFT);
-	}
-	return carry;
+    Py_ssize_t i;
+    digit carry = 0;
+
+    assert(0 <= d && d < PyLong_SHIFT);
+    for (i=0; i < m; i++) {
+        twodigits acc = (twodigits)a[i] << d | carry;
+        z[i] = (digit)acc & PyLong_MASK;
+        carry = (digit)(acc >> PyLong_SHIFT);
+    }
+    return carry;
 }
 
 /* Shift digit vector a[0:m] d bits right, with 0 <= d < PyLong_SHIFT.  Put
@@ -1484,17 +1484,17 @@ v_lshift(digit *z, digit *a, Py_ssize_t m, int d)
 static digit
 v_rshift(digit *z, digit *a, Py_ssize_t m, int d)
 {
-	Py_ssize_t i;
-	digit carry = 0;
-	digit mask = ((digit)1 << d) - 1U;
-
-	assert(0 <= d && d < PyLong_SHIFT);
-	for (i=m; i-- > 0;) {
-		twodigits acc = (twodigits)carry << PyLong_SHIFT | a[i];
-		carry = (digit)acc & mask;
-		z[i] = (digit)(acc >> d);
-	}
-	return carry;
+    Py_ssize_t i;
+    digit carry = 0;
+    digit mask = ((digit)1 << d) - 1U;
+
+    assert(0 <= d && d < PyLong_SHIFT);
+    for (i=m; i-- > 0;) {
+        twodigits acc = (twodigits)carry << PyLong_SHIFT | a[i];
+        carry = (digit)acc & mask;
+        z[i] = (digit)(acc >> d);
+    }
+    return carry;
 }
 
 /* Divide long pin, w/ size digits, by non-zero digit n, storing quotient
@@ -1506,18 +1506,18 @@ v_rshift(digit *z, digit *a, Py_ssize_t m, int d)
 static digit
 inplace_divrem1(digit *pout, digit *pin, Py_ssize_t size, digit n)
 {
-	twodigits rem = 0;
-
-	assert(n > 0 && n <= PyLong_MASK);
-	pin += size;
-	pout += size;
-	while (--size >= 0) {
-		digit hi;
-		rem = (rem << PyLong_SHIFT) | *--pin;
-		*--pout = hi = (digit)(rem / n);
-		rem -= (twodigits)hi * n;
-	}
-	return (digit)rem;
+    twodigits rem = 0;
+
+    assert(n > 0 && n <= PyLong_MASK);
+    pin += size;
+    pout += size;
+    while (--size >= 0) {
+        digit hi;
+        rem = (rem << PyLong_SHIFT) | *--pin;
+        *--pout = hi = (digit)(rem / n);
+        rem -= (twodigits)hi * n;
+    }
+    return (digit)rem;
 }
 
 /* Divide a long integer by a digit, returning both the quotient
@@ -1527,15 +1527,15 @@ inplace_divrem1(digit *pout, digit *pin, Py_ssize_t size, digit n)
 static PyLongObject *
 divrem1(PyLongObject *a, digit n, digit *prem)
 {
-	const Py_ssize_t size = ABS(Py_SIZE(a));
-	PyLongObject *z;
-
-	assert(n > 0 && n <= PyLong_MASK);
-	z = _PyLong_New(size);
-	if (z == NULL)
-		return NULL;
-	*prem = inplace_divrem1(z->ob_digit, a->ob_digit, size, n);
-	return long_normalize(z);
+    const Py_ssize_t size = ABS(Py_SIZE(a));
+    PyLongObject *z;
+
+    assert(n > 0 && n <= PyLong_MASK);
+    z = _PyLong_New(size);
+    if (z == NULL)
+        return NULL;
+    *prem = inplace_divrem1(z->ob_digit, a->ob_digit, size, n);
+    return long_normalize(z);
 }
 
 /* Convert a long integer to a base 10 string.  Returns a new non-shared
@@ -1545,111 +1545,111 @@ divrem1(PyLongObject *a, digit n, digit *prem)
 static PyObject *
 long_to_decimal_string(PyObject *aa)
 {
-	PyLongObject *scratch, *a;
-	PyObject *str;
-	Py_ssize_t size, strlen, size_a, i, j;
-	digit *pout, *pin, rem, tenpow;
-	Py_UNICODE *p;
-	int negative;
-
-	a = (PyLongObject *)aa;
-	if (a == NULL || !PyLong_Check(a)) {
-		PyErr_BadInternalCall();
-		return NULL;
-	}
-	size_a = ABS(Py_SIZE(a));
-	negative = Py_SIZE(a) < 0;
-
-	/* quick and dirty upper bound for the number of digits
-	   required to express a in base _PyLong_DECIMAL_BASE:
-
-	     #digits = 1 + floor(log2(a) / log2(_PyLong_DECIMAL_BASE))
-
-	   But log2(a) < size_a * PyLong_SHIFT, and
-	   log2(_PyLong_DECIMAL_BASE) = log2(10) * _PyLong_DECIMAL_SHIFT
-				      > 3 * _PyLong_DECIMAL_SHIFT
-	*/
-	if (size_a > PY_SSIZE_T_MAX / PyLong_SHIFT) {
-		PyErr_SetString(PyExc_OverflowError,
-				"long is too large to format");
-		return NULL;
-	}
-	/* the expression size_a * PyLong_SHIFT is now safe from overflow */
-	size = 1 + size_a * PyLong_SHIFT / (3 * _PyLong_DECIMAL_SHIFT);
-	scratch = _PyLong_New(size);
-	if (scratch == NULL)
-		return NULL;
-
-	/* convert array of base _PyLong_BASE digits in pin to an array of
-	   base _PyLong_DECIMAL_BASE digits in pout, following Knuth (TAOCP,
-	   Volume 2 (3rd edn), section 4.4, Method 1b). */
-	pin = a->ob_digit;
-	pout = scratch->ob_digit;
-	size = 0;
-	for (i = size_a; --i >= 0; ) {
-		digit hi = pin[i];
-		for (j = 0; j < size; j++) {
-			twodigits z = (twodigits)pout[j] << PyLong_SHIFT | hi;
-			hi = (digit)(z / _PyLong_DECIMAL_BASE);
-			pout[j] = (digit)(z - (twodigits)hi *
-					  _PyLong_DECIMAL_BASE);
-		}
-		while (hi) {
-			pout[size++] = hi % _PyLong_DECIMAL_BASE;
-			hi /= _PyLong_DECIMAL_BASE;
-		}
-		/* check for keyboard interrupt */
-		SIGCHECK({
-			Py_DECREF(scratch);
-			return NULL;
-		})
-	}
-	/* pout should have at least one digit, so that the case when a = 0
-	   works correctly */
-	if (size == 0)
-		pout[size++] = 0;
-
-	/* calculate exact length of output string, and allocate */
-	strlen = negative + 1 + (size - 1) * _PyLong_DECIMAL_SHIFT;
-	tenpow = 10;
-	rem = pout[size-1];
-	while (rem >= tenpow) {
-		tenpow *= 10;
-		strlen++;
-	}
-	str = PyUnicode_FromUnicode(NULL, strlen);
-	if (str == NULL) {
-		Py_DECREF(scratch);
-		return NULL;
-	}
-
-	/* fill the string right-to-left */
-	p = PyUnicode_AS_UNICODE(str) + strlen;
-	*p = '\0';
-	/* pout[0] through pout[size-2] contribute exactly
-	   _PyLong_DECIMAL_SHIFT digits each */
-	for (i=0; i < size - 1; i++) {
-		rem = pout[i];
-		for (j = 0; j < _PyLong_DECIMAL_SHIFT; j++) {
-			*--p = '0' + rem % 10;
-			rem /= 10;
-		}
-	}
-	/* pout[size-1]: always produce at least one decimal digit */
-	rem = pout[i];
-	do {
-		*--p = '0' + rem % 10;
-		rem /= 10;
-	} while (rem != 0);
-
-	/* and sign */
-	if (negative)
-		*--p = '-';
-
-	/* check we've counted correctly */
-	assert(p == PyUnicode_AS_UNICODE(str));
-	Py_DECREF(scratch);
-	return (PyObject *)str;
+    PyLongObject *scratch, *a;
+    PyObject *str;
+    Py_ssize_t size, strlen, size_a, i, j;
+    digit *pout, *pin, rem, tenpow;
+    Py_UNICODE *p;
+    int negative;
+
+    a = (PyLongObject *)aa;
+    if (a == NULL || !PyLong_Check(a)) {
+        PyErr_BadInternalCall();
+        return NULL;
+    }
+    size_a = ABS(Py_SIZE(a));
+    negative = Py_SIZE(a) < 0;
+
+    /* quick and dirty upper bound for the number of digits
+       required to express a in base _PyLong_DECIMAL_BASE:
+
+         #digits = 1 + floor(log2(a) / log2(_PyLong_DECIMAL_BASE))
+
+       But log2(a) < size_a * PyLong_SHIFT, and
+       log2(_PyLong_DECIMAL_BASE) = log2(10) * _PyLong_DECIMAL_SHIFT
+                                  > 3 * _PyLong_DECIMAL_SHIFT
+    */
+    if (size_a > PY_SSIZE_T_MAX / PyLong_SHIFT) {
+        PyErr_SetString(PyExc_OverflowError,
+                        "long is too large to format");
+        return NULL;
+    }
+    /* the expression size_a * PyLong_SHIFT is now safe from overflow */
+    size = 1 + size_a * PyLong_SHIFT / (3 * _PyLong_DECIMAL_SHIFT);
+    scratch = _PyLong_New(size);
+    if (scratch == NULL)
+        return NULL;
+
+    /* convert array of base _PyLong_BASE digits in pin to an array of
+       base _PyLong_DECIMAL_BASE digits in pout, following Knuth (TAOCP,
+       Volume 2 (3rd edn), section 4.4, Method 1b). */
+    pin = a->ob_digit;
+    pout = scratch->ob_digit;
+    size = 0;
+    for (i = size_a; --i >= 0; ) {
+        digit hi = pin[i];
+        for (j = 0; j < size; j++) {
+            twodigits z = (twodigits)pout[j] << PyLong_SHIFT | hi;
+            hi = (digit)(z / _PyLong_DECIMAL_BASE);
+            pout[j] = (digit)(z - (twodigits)hi *
+                              _PyLong_DECIMAL_BASE);
+        }
+        while (hi) {
+            pout[size++] = hi % _PyLong_DECIMAL_BASE;
+            hi /= _PyLong_DECIMAL_BASE;
+        }
+        /* check for keyboard interrupt */
+        SIGCHECK({
+            Py_DECREF(scratch);
+            return NULL;
+        })
+    }
+    /* pout should have at least one digit, so that the case when a = 0
+       works correctly */
+    if (size == 0)
+        pout[size++] = 0;
+
+    /* calculate exact length of output string, and allocate */
+    strlen = negative + 1 + (size - 1) * _PyLong_DECIMAL_SHIFT;
+    tenpow = 10;
+    rem = pout[size-1];
+    while (rem >= tenpow) {
+        tenpow *= 10;
+        strlen++;
+    }
+    str = PyUnicode_FromUnicode(NULL, strlen);
+    if (str == NULL) {
+        Py_DECREF(scratch);
+        return NULL;
+    }
+
+    /* fill the string right-to-left */
+    p = PyUnicode_AS_UNICODE(str) + strlen;
+    *p = '\0';
+    /* pout[0] through pout[size-2] contribute exactly
+       _PyLong_DECIMAL_SHIFT digits each */
+    for (i=0; i < size - 1; i++) {
+        rem = pout[i];
+        for (j = 0; j < _PyLong_DECIMAL_SHIFT; j++) {
+            *--p = '0' + rem % 10;
+            rem /= 10;
+        }
+    }
+    /* pout[size-1]: always produce at least one decimal digit */
+    rem = pout[i];
+    do {
+        *--p = '0' + rem % 10;
+        rem /= 10;
+    } while (rem != 0);
+
+    /* and sign */
+    if (negative)
+        *--p = '-';
+
+    /* check we've counted correctly */
+    assert(p == PyUnicode_AS_UNICODE(str));
+    Py_DECREF(scratch);
+    return (PyObject *)str;
 }
 
 /* Convert a long int object to a string, using a given conversion base,
@@ -1659,102 +1659,102 @@ long_to_decimal_string(PyObject *aa)
 PyObject *
 _PyLong_Format(PyObject *aa, int base)
 {
-	register PyLongObject *a = (PyLongObject *)aa;
-	PyObject *str;
-	Py_ssize_t i, sz;
-	Py_ssize_t size_a;
-	Py_UNICODE *p, sign = '\0';
-	int bits;
-
-	assert(base == 2 || base == 8 || base == 10 || base == 16);
-	if (base == 10)
-		return long_to_decimal_string((PyObject *)a);
-
-	if (a == NULL || !PyLong_Check(a)) {
-		PyErr_BadInternalCall();
-		return NULL;
-	}
-	size_a = ABS(Py_SIZE(a));
-
-	/* Compute a rough upper bound for the length of the string */
-	switch (base) {
-	case 16:
-		bits = 4;
-		break;
-	case 8:
-		bits = 3;
-		break;
-	case 2:
-		bits = 1;
-		break;
-	default:
-		assert(0); /* shouldn't ever get here */
-		bits = 0; /* to silence gcc warning */
-	}
-	/* compute length of output string: allow 2 characters for prefix and
-	   1 for possible '-' sign. */
-	if (size_a > (PY_SSIZE_T_MAX - 3) / PyLong_SHIFT) {
-		PyErr_SetString(PyExc_OverflowError,
-				"int is too large to format");
-		return NULL;
-	}
-	/* now size_a * PyLong_SHIFT + 3 <= PY_SSIZE_T_MAX, so the RHS below
-	   is safe from overflow */
-	sz = 3 + (size_a * PyLong_SHIFT + (bits - 1)) / bits;
-	assert(sz >= 0);
-	str = PyUnicode_FromUnicode(NULL, sz);
-	if (str == NULL)
-		return NULL;
-	p = PyUnicode_AS_UNICODE(str) + sz;
-	*p = '\0';
-	if (Py_SIZE(a) < 0)
-		sign = '-';
-
-	if (Py_SIZE(a) == 0) {
-		*--p = '0';
-	}
-	else {
-		/* JRH: special case for power-of-2 bases */
-		twodigits accum = 0;
-		int accumbits = 0;	/* # of bits in accum */
-		for (i = 0; i < size_a; ++i) {
-			accum |= (twodigits)a->ob_digit[i] << accumbits;
-			accumbits += PyLong_SHIFT;
-			assert(accumbits >= bits);
-			do {
-				Py_UNICODE cdigit;
-				cdigit = (Py_UNICODE)(accum & (base - 1));
-				cdigit += (cdigit < 10) ? '0' : 'a'-10;
-				assert(p > PyUnicode_AS_UNICODE(str));
-				*--p = cdigit;
-				accumbits -= bits;
-				accum >>= bits;
-			} while (i < size_a-1 ? accumbits >= bits : accum > 0);
-		}
-	}
-
-	if (base == 16)
-		*--p = 'x';
-	else if (base == 8)
-		*--p = 'o';
-	else /* (base == 2) */
-		*--p = 'b';
-	*--p = '0';
-	if (sign)
-		*--p = sign;
-	if (p != PyUnicode_AS_UNICODE(str)) {
-		Py_UNICODE *q = PyUnicode_AS_UNICODE(str);
-		assert(p > q);
-		do {
-		} while ((*q++ = *p++) != '\0');
-		q--;
-		if (PyUnicode_Resize(&str,(Py_ssize_t) (q -
-						PyUnicode_AS_UNICODE(str)))) {
-			Py_DECREF(str);
-			return NULL;
-		}
-	}
-	return (PyObject *)str;
+    register PyLongObject *a = (PyLongObject *)aa;
+    PyObject *str;
+    Py_ssize_t i, sz;
+    Py_ssize_t size_a;
+    Py_UNICODE *p, sign = '\0';
+    int bits;
+
+    assert(base == 2 || base == 8 || base == 10 || base == 16);
+    if (base == 10)
+        return long_to_decimal_string((PyObject *)a);
+
+    if (a == NULL || !PyLong_Check(a)) {
+        PyErr_BadInternalCall();
+        return NULL;
+    }
+    size_a = ABS(Py_SIZE(a));
+
+    /* Compute a rough upper bound for the length of the string */
+    switch (base) {
+    case 16:
+        bits = 4;
+        break;
+    case 8:
+        bits = 3;
+        break;
+    case 2:
+        bits = 1;
+        break;
+    default:
+        assert(0); /* shouldn't ever get here */
+        bits = 0; /* to silence gcc warning */
+    }
+    /* compute length of output string: allow 2 characters for prefix and
+       1 for possible '-' sign. */
+    if (size_a > (PY_SSIZE_T_MAX - 3) / PyLong_SHIFT) {
+        PyErr_SetString(PyExc_OverflowError,
+                        "int is too large to format");
+        return NULL;
+    }
+    /* now size_a * PyLong_SHIFT + 3 <= PY_SSIZE_T_MAX, so the RHS below
+       is safe from overflow */
+    sz = 3 + (size_a * PyLong_SHIFT + (bits - 1)) / bits;
+    assert(sz >= 0);
+    str = PyUnicode_FromUnicode(NULL, sz);
+    if (str == NULL)
+        return NULL;
+    p = PyUnicode_AS_UNICODE(str) + sz;
+    *p = '\0';
+    if (Py_SIZE(a) < 0)
+        sign = '-';
+
+    if (Py_SIZE(a) == 0) {
+        *--p = '0';
+    }
+    else {
+        /* JRH: special case for power-of-2 bases */
+        twodigits accum = 0;
+        int accumbits = 0;              /* # of bits in accum */
+        for (i = 0; i < size_a; ++i) {
+            accum |= (twodigits)a->ob_digit[i] << accumbits;
+            accumbits += PyLong_SHIFT;
+            assert(accumbits >= bits);
+            do {
+                Py_UNICODE cdigit;
+                cdigit = (Py_UNICODE)(accum & (base - 1));
+                cdigit += (cdigit < 10) ? '0' : 'a'-10;
+                assert(p > PyUnicode_AS_UNICODE(str));
+                *--p = cdigit;
+                accumbits -= bits;
+                accum >>= bits;
+            } while (i < size_a-1 ? accumbits >= bits : accum > 0);
+        }
+    }
+
+    if (base == 16)
+        *--p = 'x';
+    else if (base == 8)
+        *--p = 'o';
+    else /* (base == 2) */
+        *--p = 'b';
+    *--p = '0';
+    if (sign)
+        *--p = sign;
+    if (p != PyUnicode_AS_UNICODE(str)) {
+        Py_UNICODE *q = PyUnicode_AS_UNICODE(str);
+        assert(p > q);
+        do {
+        } while ((*q++ = *p++) != '\0');
+        q--;
+        if (PyUnicode_Resize(&str,(Py_ssize_t) (q -
+                                        PyUnicode_AS_UNICODE(str)))) {
+            Py_DECREF(str);
+            return NULL;
+        }
+    }
+    return (PyObject *)str;
 }
 
 /* Table of digit values for 8-bit string -> integer conversion.
@@ -1765,22 +1765,22 @@ _PyLong_Format(PyObject *aa, int base)
  * base B digit iff _PyLong_DigitValue[Py_CHARPyLong_MASK(c)] < B.
  */
 unsigned char _PyLong_DigitValue[256] = {
-	37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
-	37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
-	37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
-	0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  37, 37, 37, 37, 37, 37,
-	37, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
-	25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 37, 37, 37, 37,
-	37, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
-	25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 37, 37, 37, 37,
-	37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
-	37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
-	37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
-	37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
-	37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
-	37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
-	37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
-	37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
+    37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
+    37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
+    37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
+    0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  37, 37, 37, 37, 37, 37,
+    37, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
+    25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 37, 37, 37, 37,
+    37, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
+    25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 37, 37, 37, 37,
+    37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
+    37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
+    37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
+    37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
+    37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
+    37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
+    37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
+    37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37, 37,
 };
 
 /* *str points to the first digit in a string of base `base` digits.  base
@@ -1792,111 +1792,111 @@ unsigned char _PyLong_DigitValue[256] = {
 static PyLongObject *
 long_from_binary_base(char **str, int base)
 {
-	char *p = *str;
-	char *start = p;
-	int bits_per_char;
-	Py_ssize_t n;
-	PyLongObject *z;
-	twodigits accum;
-	int bits_in_accum;
-	digit *pdigit;
-
-	assert(base >= 2 && base <= 32 && (base & (base - 1)) == 0);
-	n = base;
-	for (bits_per_char = -1; n; ++bits_per_char)
-		n >>= 1;
-	/* n <- total # of bits needed, while setting p to end-of-string */
-	while (_PyLong_DigitValue[Py_CHARMASK(*p)] < base)
-		++p;
-	*str = p;
-	/* n <- # of Python digits needed, = ceiling(n/PyLong_SHIFT). */
-	n = (p - start) * bits_per_char + PyLong_SHIFT - 1;
-	if (n / bits_per_char < p - start) {
-		PyErr_SetString(PyExc_ValueError,
-				"int string too large to convert");
-		return NULL;
-	}
-	n = n / PyLong_SHIFT;
-	z = _PyLong_New(n);
-	if (z == NULL)
-		return NULL;
-	/* Read string from right, and fill in long from left; i.e.,
-	 * from least to most significant in both.
-	 */
-	accum = 0;
-	bits_in_accum = 0;
-	pdigit = z->ob_digit;
-	while (--p >= start) {
-		int k = (int)_PyLong_DigitValue[Py_CHARMASK(*p)];
-		assert(k >= 0 && k < base);
-		accum |= (twodigits)k << bits_in_accum;
-		bits_in_accum += bits_per_char;
-		if (bits_in_accum >= PyLong_SHIFT) {
-			*pdigit++ = (digit)(accum & PyLong_MASK);
-			assert(pdigit - z->ob_digit <= n);
-			accum >>= PyLong_SHIFT;
-			bits_in_accum -= PyLong_SHIFT;
-			assert(bits_in_accum < PyLong_SHIFT);
-		}
-	}
-	if (bits_in_accum) {
-		assert(bits_in_accum <= PyLong_SHIFT);
-		*pdigit++ = (digit)accum;
-		assert(pdigit - z->ob_digit <= n);
-	}
-	while (pdigit - z->ob_digit < n)
-		*pdigit++ = 0;
-	return long_normalize(z);
+    char *p = *str;
+    char *start = p;
+    int bits_per_char;
+    Py_ssize_t n;
+    PyLongObject *z;
+    twodigits accum;
+    int bits_in_accum;
+    digit *pdigit;
+
+    assert(base >= 2 && base <= 32 && (base & (base - 1)) == 0);
+    n = base;
+    for (bits_per_char = -1; n; ++bits_per_char)
+        n >>= 1;
+    /* n <- total # of bits needed, while setting p to end-of-string */
+    while (_PyLong_DigitValue[Py_CHARMASK(*p)] < base)
+        ++p;
+    *str = p;
+    /* n <- # of Python digits needed, = ceiling(n/PyLong_SHIFT). */
+    n = (p - start) * bits_per_char + PyLong_SHIFT - 1;
+    if (n / bits_per_char < p - start) {
+        PyErr_SetString(PyExc_ValueError,
+                        "int string too large to convert");
+        return NULL;
+    }
+    n = n / PyLong_SHIFT;
+    z = _PyLong_New(n);
+    if (z == NULL)
+        return NULL;
+    /* Read string from right, and fill in long from left; i.e.,
+     * from least to most significant in both.
+     */
+    accum = 0;
+    bits_in_accum = 0;
+    pdigit = z->ob_digit;
+    while (--p >= start) {
+        int k = (int)_PyLong_DigitValue[Py_CHARMASK(*p)];
+        assert(k >= 0 && k < base);
+        accum |= (twodigits)k << bits_in_accum;
+        bits_in_accum += bits_per_char;
+        if (bits_in_accum >= PyLong_SHIFT) {
+            *pdigit++ = (digit)(accum & PyLong_MASK);
+            assert(pdigit - z->ob_digit <= n);
+            accum >>= PyLong_SHIFT;
+            bits_in_accum -= PyLong_SHIFT;
+            assert(bits_in_accum < PyLong_SHIFT);
+        }
+    }
+    if (bits_in_accum) {
+        assert(bits_in_accum <= PyLong_SHIFT);
+        *pdigit++ = (digit)accum;
+        assert(pdigit - z->ob_digit <= n);
+    }
+    while (pdigit - z->ob_digit < n)
+        *pdigit++ = 0;
+    return long_normalize(z);
 }
 
 PyObject *
 PyLong_FromString(char *str, char **pend, int base)
 {
-	int sign = 1, error_if_nonzero = 0;
-	char *start, *orig_str = str;
-	PyLongObject *z = NULL;
-	PyObject *strobj;
-	Py_ssize_t slen;
-
-	if ((base != 0 && base < 2) || base > 36) {
-		PyErr_SetString(PyExc_ValueError,
-				"int() arg 2 must be >= 2 and <= 36");
-		return NULL;
-	}
-	while (*str != '\0' && isspace(Py_CHARMASK(*str)))
-		str++;
-	if (*str == '+')
-		++str;
-	else if (*str == '-') {
-		++str;
-		sign = -1;
-	}
-	if (base == 0) {
-		if (str[0] != '0')
-			base = 10;
-		else if (str[1] == 'x' || str[1] == 'X')
-			base = 16;
-		else if (str[1] == 'o' || str[1] == 'O')
-			base = 8;
-		else if (str[1] == 'b' || str[1] == 'B')
-			base = 2;
-		else {
-			/* "old" (C-style) octal literal, now invalid.
-			   it might still be zero though */
-			error_if_nonzero = 1;
-			base = 10;
-		}
-	}
-	if (str[0] == '0' &&
-	    ((base == 16 && (str[1] == 'x' || str[1] == 'X')) ||
-	     (base == 8  && (str[1] == 'o' || str[1] == 'O')) ||
-	     (base == 2  && (str[1] == 'b' || str[1] == 'B'))))
-		str += 2;
-
-	start = str;
-	if ((base & (base - 1)) == 0)
-		z = long_from_binary_base(&str, base);
-	else {
+    int sign = 1, error_if_nonzero = 0;
+    char *start, *orig_str = str;
+    PyLongObject *z = NULL;
+    PyObject *strobj;
+    Py_ssize_t slen;
+
+    if ((base != 0 && base < 2) || base > 36) {
+        PyErr_SetString(PyExc_ValueError,
+                        "int() arg 2 must be >= 2 and <= 36");
+        return NULL;
+    }
+    while (*str != '\0' && isspace(Py_CHARMASK(*str)))
+        str++;
+    if (*str == '+')
+        ++str;
+    else if (*str == '-') {
+        ++str;
+        sign = -1;
+    }
+    if (base == 0) {
+        if (str[0] != '0')
+            base = 10;
+        else if (str[1] == 'x' || str[1] == 'X')
+            base = 16;
+        else if (str[1] == 'o' || str[1] == 'O')
+            base = 8;
+        else if (str[1] == 'b' || str[1] == 'B')
+            base = 2;
+        else {
+            /* "old" (C-style) octal literal, now invalid.
+               it might still be zero though */
+            error_if_nonzero = 1;
+            base = 10;
+        }
+    }
+    if (str[0] == '0' &&
+        ((base == 16 && (str[1] == 'x' || str[1] == 'X')) ||
+         (base == 8  && (str[1] == 'o' || str[1] == 'O')) ||
+         (base == 2  && (str[1] == 'b' || str[1] == 'B'))))
+        str += 2;
+
+    start = str;
+    if ((base & (base - 1)) == 0)
+        z = long_from_binary_base(&str, base);
+    else {
 /***
 Binary bases can be converted in time linear in the number of digits, because
 Python's representation base is binary.  Other bases (including decimal!) use
@@ -1982,227 +1982,227 @@ that triggers it(!).  Instead the code was tested by artificially allocating
 just 1 digit at the start, so that the copying code was exercised for every
 digit beyond the first.
 ***/
-		register twodigits c;	/* current input character */
-		Py_ssize_t size_z;
-		int i;
-		int convwidth;
-		twodigits convmultmax, convmult;
-		digit *pz, *pzstop;
-		char* scan;
-
-		static double log_base_BASE[37] = {0.0e0,};
-		static int convwidth_base[37] = {0,};
-		static twodigits convmultmax_base[37] = {0,};
-
-		if (log_base_BASE[base] == 0.0) {
-			twodigits convmax = base;
-			int i = 1;
-
-			log_base_BASE[base] = log((double)base) /
-						log((double)PyLong_BASE);
-			for (;;) {
-				twodigits next = convmax * base;
-				if (next > PyLong_BASE)
-					break;
-				convmax = next;
-				++i;
-			}
-			convmultmax_base[base] = convmax;
-			assert(i > 0);
-			convwidth_base[base] = i;
-		}
-
-		/* Find length of the string of numeric characters. */
-		scan = str;
-		while (_PyLong_DigitValue[Py_CHARMASK(*scan)] < base)
-			++scan;
-
-		/* Create a long object that can contain the largest possible
-		 * integer with this base and length.  Note that there's no
-		 * need to initialize z->ob_digit -- no slot is read up before
-		 * being stored into.
-		 */
-		size_z = (Py_ssize_t)((scan - str) * log_base_BASE[base]) + 1;
-		/* Uncomment next line to test exceedingly rare copy code */
-		/* size_z = 1; */
-		assert(size_z > 0);
-		z = _PyLong_New(size_z);
-		if (z == NULL)
-			return NULL;
-		Py_SIZE(z) = 0;
-
-		/* `convwidth` consecutive input digits are treated as a single
-		 * digit in base `convmultmax`.
-		 */
-		convwidth = convwidth_base[base];
-		convmultmax = convmultmax_base[base];
-
-		/* Work ;-) */
-		while (str < scan) {
-			/* grab up to convwidth digits from the input string */
-			c = (digit)_PyLong_DigitValue[Py_CHARMASK(*str++)];
-			for (i = 1; i < convwidth && str != scan; ++i, ++str) {
-				c = (twodigits)(c *  base +
-					(int)_PyLong_DigitValue[Py_CHARMASK(*str)]);
-				assert(c < PyLong_BASE);
-			}
-
-			convmult = convmultmax;
-			/* Calculate the shift only if we couldn't get
-			 * convwidth digits.
-			 */
-			if (i != convwidth) {
-				convmult = base;
-				for ( ; i > 1; --i)
-					convmult *= base;
-			}
-
-			/* Multiply z by convmult, and add c. */
-			pz = z->ob_digit;
-			pzstop = pz + Py_SIZE(z);
-			for (; pz < pzstop; ++pz) {
-				c += (twodigits)*pz * convmult;
-				*pz = (digit)(c & PyLong_MASK);
-				c >>= PyLong_SHIFT;
-			}
-			/* carry off the current end? */
-			if (c) {
-				assert(c < PyLong_BASE);
-				if (Py_SIZE(z) < size_z) {
-					*pz = (digit)c;
-					++Py_SIZE(z);
-				}
-				else {
-					PyLongObject *tmp;
-					/* Extremely rare.  Get more space. */
-					assert(Py_SIZE(z) == size_z);
-					tmp = _PyLong_New(size_z + 1);
-					if (tmp == NULL) {
-						Py_DECREF(z);
-						return NULL;
-					}
-					memcpy(tmp->ob_digit,
-					       z->ob_digit,
-					       sizeof(digit) * size_z);
-					Py_DECREF(z);
-					z = tmp;
-					z->ob_digit[size_z] = (digit)c;
-					++size_z;
-				}
-			}
-		}
-	}
-	if (z == NULL)
-		return NULL;
-	if (error_if_nonzero) {
-		/* reset the base to 0, else the exception message
-		   doesn't make too much sense */
-		base = 0;
-		if (Py_SIZE(z) != 0)
-			goto onError;
-		/* there might still be other problems, therefore base
-		   remains zero here for the same reason */
-	}
-	if (str == start)
-		goto onError;
-	if (sign < 0)
-		Py_SIZE(z) = -(Py_SIZE(z));
-	while (*str && isspace(Py_CHARMASK(*str)))
-		str++;
-	if (*str != '\0')
-		goto onError;
-	if (pend)
-		*pend = str;
-	long_normalize(z);
-	return (PyObject *) maybe_small_long(z);
+        register twodigits c;           /* current input character */
+        Py_ssize_t size_z;
+        int i;
+        int convwidth;
+        twodigits convmultmax, convmult;
+        digit *pz, *pzstop;
+        char* scan;
+
+        static double log_base_BASE[37] = {0.0e0,};
+        static int convwidth_base[37] = {0,};
+        static twodigits convmultmax_base[37] = {0,};
+
+        if (log_base_BASE[base] == 0.0) {
+            twodigits convmax = base;
+            int i = 1;
+
+            log_base_BASE[base] = log((double)base) /
+                                    log((double)PyLong_BASE);
+            for (;;) {
+                twodigits next = convmax * base;
+                if (next > PyLong_BASE)
+                    break;
+                convmax = next;
+                ++i;
+            }
+            convmultmax_base[base] = convmax;
+            assert(i > 0);
+            convwidth_base[base] = i;
+        }
+
+        /* Find length of the string of numeric characters. */
+        scan = str;
+        while (_PyLong_DigitValue[Py_CHARMASK(*scan)] < base)
+            ++scan;
+
+        /* Create a long object that can contain the largest possible
+         * integer with this base and length.  Note that there's no
+         * need to initialize z->ob_digit -- no slot is read up before
+         * being stored into.
+         */
+        size_z = (Py_ssize_t)((scan - str) * log_base_BASE[base]) + 1;
+        /* Uncomment next line to test exceedingly rare copy code */
+        /* size_z = 1; */
+        assert(size_z > 0);
+        z = _PyLong_New(size_z);
+        if (z == NULL)
+            return NULL;
+        Py_SIZE(z) = 0;
+
+        /* `convwidth` consecutive input digits are treated as a single
+         * digit in base `convmultmax`.
+         */
+        convwidth = convwidth_base[base];
+        convmultmax = convmultmax_base[base];
+
+        /* Work ;-) */
+        while (str < scan) {
+            /* grab up to convwidth digits from the input string */
+            c = (digit)_PyLong_DigitValue[Py_CHARMASK(*str++)];
+            for (i = 1; i < convwidth && str != scan; ++i, ++str) {
+                c = (twodigits)(c *  base +
+                    (int)_PyLong_DigitValue[Py_CHARMASK(*str)]);
+                assert(c < PyLong_BASE);
+            }
+
+            convmult = convmultmax;
+            /* Calculate the shift only if we couldn't get
+             * convwidth digits.
+             */
+            if (i != convwidth) {
+                convmult = base;
+                for ( ; i > 1; --i)
+                    convmult *= base;
+            }
+
+            /* Multiply z by convmult, and add c. */
+            pz = z->ob_digit;
+            pzstop = pz + Py_SIZE(z);
+            for (; pz < pzstop; ++pz) {
+                c += (twodigits)*pz * convmult;
+                *pz = (digit)(c & PyLong_MASK);
+                c >>= PyLong_SHIFT;
+            }
+            /* carry off the current end? */
+            if (c) {
+                assert(c < PyLong_BASE);
+                if (Py_SIZE(z) < size_z) {
+                    *pz = (digit)c;
+                    ++Py_SIZE(z);
+                }
+                else {
+                    PyLongObject *tmp;
+                    /* Extremely rare.  Get more space. */
+                    assert(Py_SIZE(z) == size_z);
+                    tmp = _PyLong_New(size_z + 1);
+                    if (tmp == NULL) {
+                        Py_DECREF(z);
+                        return NULL;
+                    }
+                    memcpy(tmp->ob_digit,
+                           z->ob_digit,
+                           sizeof(digit) * size_z);
+                    Py_DECREF(z);
+                    z = tmp;
+                    z->ob_digit[size_z] = (digit)c;
+                    ++size_z;
+                }
+            }
+        }
+    }
+    if (z == NULL)
+        return NULL;
+    if (error_if_nonzero) {
+        /* reset the base to 0, else the exception message
+           doesn't make too much sense */
+        base = 0;
+        if (Py_SIZE(z) != 0)
+            goto onError;
+        /* there might still be other problems, therefore base
+           remains zero here for the same reason */
+    }
+    if (str == start)
+        goto onError;
+    if (sign < 0)
+        Py_SIZE(z) = -(Py_SIZE(z));
+    while (*str && isspace(Py_CHARMASK(*str)))
+        str++;
+    if (*str != '\0')
+        goto onError;
+    if (pend)
+        *pend = str;
+    long_normalize(z);
+    return (PyObject *) maybe_small_long(z);
 
  onError:
-	Py_XDECREF(z);
-	slen = strlen(orig_str) < 200 ? strlen(orig_str) : 200;
-	strobj = PyUnicode_FromStringAndSize(orig_str, slen);
-	if (strobj == NULL)
-		return NULL;
-	PyErr_Format(PyExc_ValueError,
-		     "invalid literal for int() with base %d: %R",
-		     base, strobj);
-	Py_DECREF(strobj);
-	return NULL;
+    Py_XDECREF(z);
+    slen = strlen(orig_str) < 200 ? strlen(orig_str) : 200;
+    strobj = PyUnicode_FromStringAndSize(orig_str, slen);
+    if (strobj == NULL)
+        return NULL;
+    PyErr_Format(PyExc_ValueError,
+                 "invalid literal for int() with base %d: %R",
+                 base, strobj);
+    Py_DECREF(strobj);
+    return NULL;
 }
 
 PyObject *
 PyLong_FromUnicode(Py_UNICODE *u, Py_ssize_t length, int base)
 {
-	PyObject *result;
-	char *buffer = (char *)PyMem_MALLOC(length+1);
-
-	if (buffer == NULL)
-		return NULL;
-
-	if (PyUnicode_EncodeDecimal(u, length, buffer, NULL)) {
-		PyMem_FREE(buffer);
-		return NULL;
-	}
-	result = PyLong_FromString(buffer, NULL, base);
-	PyMem_FREE(buffer);
-	return result;
+    PyObject *result;
+    char *buffer = (char *)PyMem_MALLOC(length+1);
+
+    if (buffer == NULL)
+        return NULL;
+
+    if (PyUnicode_EncodeDecimal(u, length, buffer, NULL)) {
+        PyMem_FREE(buffer);
+        return NULL;
+    }
+    result = PyLong_FromString(buffer, NULL, base);
+    PyMem_FREE(buffer);
+    return result;
 }
 
 /* forward */
 static PyLongObject *x_divrem
-	(PyLongObject *, PyLongObject *, PyLongObject **);
+    (PyLongObject *, PyLongObject *, PyLongObject **);
 static PyObject *long_long(PyObject *v);
 
 /* Long division with remainder, top-level routine */
 
 static int
 long_divrem(PyLongObject *a, PyLongObject *b,
-	    PyLongObject **pdiv, PyLongObject **prem)
+            PyLongObject **pdiv, PyLongObject **prem)
 {
-	Py_ssize_t size_a = ABS(Py_SIZE(a)), size_b = ABS(Py_SIZE(b));
-	PyLongObject *z;
-
-	if (size_b == 0) {
-		PyErr_SetString(PyExc_ZeroDivisionError,
-				"integer division or modulo by zero");
-		return -1;
-	}
-	if (size_a < size_b ||
-	    (size_a == size_b &&
-	     a->ob_digit[size_a-1] < b->ob_digit[size_b-1])) {
-		/* |a| < |b|. */
-		*pdiv = (PyLongObject*)PyLong_FromLong(0);
-		if (*pdiv == NULL)
-			return -1;
-		Py_INCREF(a);
-		*prem = (PyLongObject *) a;
-		return 0;
-	}
-	if (size_b == 1) {
-		digit rem = 0;
-		z = divrem1(a, b->ob_digit[0], &rem);
-		if (z == NULL)
-			return -1;
-		*prem = (PyLongObject *) PyLong_FromLong((long)rem);
-		if (*prem == NULL) {
-			Py_DECREF(z);
-			return -1;
-		}
-	}
-	else {
-		z = x_divrem(a, b, prem);
-		if (z == NULL)
-			return -1;
-	}
-	/* Set the signs.
-	   The quotient z has the sign of a*b;
-	   the remainder r has the sign of a,
-	   so a = b*z + r. */
-	if ((Py_SIZE(a) < 0) != (Py_SIZE(b) < 0))
-		NEGATE(z);
-	if (Py_SIZE(a) < 0 && Py_SIZE(*prem) != 0)
-		NEGATE(*prem);
-	*pdiv = maybe_small_long(z);
-	return 0;
+    Py_ssize_t size_a = ABS(Py_SIZE(a)), size_b = ABS(Py_SIZE(b));
+    PyLongObject *z;
+
+    if (size_b == 0) {
+        PyErr_SetString(PyExc_ZeroDivisionError,
+                        "integer division or modulo by zero");
+        return -1;
+    }
+    if (size_a < size_b ||
+        (size_a == size_b &&
+         a->ob_digit[size_a-1] < b->ob_digit[size_b-1])) {
+        /* |a| < |b|. */
+        *pdiv = (PyLongObject*)PyLong_FromLong(0);
+        if (*pdiv == NULL)
+            return -1;
+        Py_INCREF(a);
+        *prem = (PyLongObject *) a;
+        return 0;
+    }
+    if (size_b == 1) {
+        digit rem = 0;
+        z = divrem1(a, b->ob_digit[0], &rem);
+        if (z == NULL)
+            return -1;
+        *prem = (PyLongObject *) PyLong_FromLong((long)rem);
+        if (*prem == NULL) {
+            Py_DECREF(z);
+            return -1;
+        }
+    }
+    else {
+        z = x_divrem(a, b, prem);
+        if (z == NULL)
+            return -1;
+    }
+    /* Set the signs.
+       The quotient z has the sign of a*b;
+       the remainder r has the sign of a,
+       so a = b*z + r. */
+    if ((Py_SIZE(a) < 0) != (Py_SIZE(b) < 0))
+        NEGATE(z);
+    if (Py_SIZE(a) < 0 && Py_SIZE(*prem) != 0)
+        NEGATE(*prem);
+    *pdiv = maybe_small_long(z);
+    return 0;
 }
 
 /* Unsigned long division with remainder -- the algorithm.  The arguments v1
@@ -2211,125 +2211,125 @@ long_divrem(PyLongObject *a, PyLongObject *b,
 static PyLongObject *
 x_divrem(PyLongObject *v1, PyLongObject *w1, PyLongObject **prem)
 {
-	PyLongObject *v, *w, *a;
-	Py_ssize_t i, k, size_v, size_w;
-	int d;
-	digit wm1, wm2, carry, q, r, vtop, *v0, *vk, *w0, *ak;
-	twodigits vv;
-	sdigit zhi;
-	stwodigits z;
-
-	/* We follow Knuth [The Art of Computer Programming, Vol. 2 (3rd
-	   edn.), section 4.3.1, Algorithm D], except that we don't explicitly
-	   handle the special case when the initial estimate q for a quotient
-	   digit is >= PyLong_BASE: the max value for q is PyLong_BASE+1, and
-	   that won't overflow a digit. */
-
-	/* allocate space; w will also be used to hold the final remainder */
-	size_v = ABS(Py_SIZE(v1));
-	size_w = ABS(Py_SIZE(w1));
-	assert(size_v >= size_w && size_w >= 2); /* Assert checks by div() */
-	v = _PyLong_New(size_v+1);
-	if (v == NULL) {
-		*prem = NULL;
-		return NULL;
-	}
-	w = _PyLong_New(size_w);
-	if (w == NULL) {
-		Py_DECREF(v);
-		*prem = NULL;
-		return NULL;
-	}
-
-	/* normalize: shift w1 left so that its top digit is >= PyLong_BASE/2.
-	   shift v1 left by the same amount.  Results go into w and v. */
-	d = PyLong_SHIFT - bits_in_digit(w1->ob_digit[size_w-1]);
-	carry = v_lshift(w->ob_digit, w1->ob_digit, size_w, d);
-	assert(carry == 0);
-	carry = v_lshift(v->ob_digit, v1->ob_digit, size_v, d);
-	if (carry != 0 || v->ob_digit[size_v-1] >= w->ob_digit[size_w-1]) {
-		v->ob_digit[size_v] = carry;
-		size_v++;
-	}
-
-	/* Now v->ob_digit[size_v-1] < w->ob_digit[size_w-1], so quotient has
-	   at most (and usually exactly) k = size_v - size_w digits. */
-	k = size_v - size_w;
-	assert(k >= 0);
-	a = _PyLong_New(k);
-	if (a == NULL) {
-		Py_DECREF(w);
-		Py_DECREF(v);
-		*prem = NULL;
-		return NULL;
-	}
-	v0 = v->ob_digit;
-	w0 = w->ob_digit;
-	wm1 = w0[size_w-1];
-	wm2 = w0[size_w-2];
-	for (vk = v0+k, ak = a->ob_digit + k; vk-- > v0;) {
-		/* inner loop: divide vk[0:size_w+1] by w0[0:size_w], giving
-		   single-digit quotient q, remainder in vk[0:size_w]. */
-
-		SIGCHECK({
-			Py_DECREF(a);
-			Py_DECREF(w);
-			Py_DECREF(v);
-			*prem = NULL;
-			return NULL;
-		})
-
-		/* estimate quotient digit q; may overestimate by 1 (rare) */
-		vtop = vk[size_w];
-		assert(vtop <= wm1);
-		vv = ((twodigits)vtop << PyLong_SHIFT) | vk[size_w-1];
-		q = (digit)(vv / wm1);
-		r = (digit)(vv - (twodigits)wm1 * q); /* r = vv % wm1 */
-		while ((twodigits)wm2 * q > (((twodigits)r << PyLong_SHIFT)
-					     | vk[size_w-2])) {
-			--q;
-			r += wm1;
-			if (r >= PyLong_BASE)
-				break;
-		}
-		assert(q <= PyLong_BASE);
-
-		/* subtract q*w0[0:size_w] from vk[0:size_w+1] */
-		zhi = 0;
-		for (i = 0; i < size_w; ++i) {
-			/* invariants: -PyLong_BASE <= -q <= zhi <= 0;
-			   -PyLong_BASE * q <= z < PyLong_BASE */
-			z = (sdigit)vk[i] + zhi -
-				(stwodigits)q * (stwodigits)w0[i];
-			vk[i] = (digit)z & PyLong_MASK;
-			zhi = (sdigit)Py_ARITHMETIC_RIGHT_SHIFT(stwodigits,
-							z, PyLong_SHIFT);
-		}
-
-		/* add w back if q was too large (this branch taken rarely) */
-		assert((sdigit)vtop + zhi == -1 || (sdigit)vtop + zhi == 0);
-		if ((sdigit)vtop + zhi < 0) {
-			carry = 0;
-			for (i = 0; i < size_w; ++i) {
-				carry += vk[i] + w0[i];
-				vk[i] = carry & PyLong_MASK;
-				carry >>= PyLong_SHIFT;
-			}
-			--q;
-		}
-
-		/* store quotient digit */
-		assert(q < PyLong_BASE);
-		*--ak = q;
-	}
-
-	/* unshift remainder; we reuse w to store the result */
-	carry = v_rshift(w0, v0, size_w, d);
-	assert(carry==0);
-	Py_DECREF(v);
-
-	*prem = long_normalize(w);
-	return long_normalize(a);
+    PyLongObject *v, *w, *a;
+    Py_ssize_t i, k, size_v, size_w;
+    int d;
+    digit wm1, wm2, carry, q, r, vtop, *v0, *vk, *w0, *ak;
+    twodigits vv;
+    sdigit zhi;
+    stwodigits z;
+
+    /* We follow Knuth [The Art of Computer Programming, Vol. 2 (3rd
+       edn.), section 4.3.1, Algorithm D], except that we don't explicitly
+       handle the special case when the initial estimate q for a quotient
+       digit is >= PyLong_BASE: the max value for q is PyLong_BASE+1, and
+       that won't overflow a digit. */
+
+    /* allocate space; w will also be used to hold the final remainder */
+    size_v = ABS(Py_SIZE(v1));
+    size_w = ABS(Py_SIZE(w1));
+    assert(size_v >= size_w && size_w >= 2); /* Assert checks by div() */
+    v = _PyLong_New(size_v+1);
+    if (v == NULL) {
+        *prem = NULL;
+        return NULL;
+    }
+    w = _PyLong_New(size_w);
+    if (w == NULL) {
+        Py_DECREF(v);
+        *prem = NULL;
+        return NULL;
+    }
+
+    /* normalize: shift w1 left so that its top digit is >= PyLong_BASE/2.
+       shift v1 left by the same amount.  Results go into w and v. */
+    d = PyLong_SHIFT - bits_in_digit(w1->ob_digit[size_w-1]);
+    carry = v_lshift(w->ob_digit, w1->ob_digit, size_w, d);
+    assert(carry == 0);
+    carry = v_lshift(v->ob_digit, v1->ob_digit, size_v, d);
+    if (carry != 0 || v->ob_digit[size_v-1] >= w->ob_digit[size_w-1]) {
+        v->ob_digit[size_v] = carry;
+        size_v++;
+    }
+
+    /* Now v->ob_digit[size_v-1] < w->ob_digit[size_w-1], so quotient has
+       at most (and usually exactly) k = size_v - size_w digits. */
+    k = size_v - size_w;
+    assert(k >= 0);
+    a = _PyLong_New(k);
+    if (a == NULL) {
+        Py_DECREF(w);
+        Py_DECREF(v);
+        *prem = NULL;
+        return NULL;
+    }
+    v0 = v->ob_digit;
+    w0 = w->ob_digit;
+    wm1 = w0[size_w-1];
+    wm2 = w0[size_w-2];
+    for (vk = v0+k, ak = a->ob_digit + k; vk-- > v0;) {
+        /* inner loop: divide vk[0:size_w+1] by w0[0:size_w], giving
+           single-digit quotient q, remainder in vk[0:size_w]. */
+
+        SIGCHECK({
+            Py_DECREF(a);
+            Py_DECREF(w);
+            Py_DECREF(v);
+            *prem = NULL;
+            return NULL;
+        })
+
+        /* estimate quotient digit q; may overestimate by 1 (rare) */
+        vtop = vk[size_w];
+        assert(vtop <= wm1);
+        vv = ((twodigits)vtop << PyLong_SHIFT) | vk[size_w-1];
+        q = (digit)(vv / wm1);
+        r = (digit)(vv - (twodigits)wm1 * q); /* r = vv % wm1 */
+        while ((twodigits)wm2 * q > (((twodigits)r << PyLong_SHIFT)
+                                     | vk[size_w-2])) {
+            --q;
+            r += wm1;
+            if (r >= PyLong_BASE)
+                break;
+        }
+        assert(q <= PyLong_BASE);
+
+        /* subtract q*w0[0:size_w] from vk[0:size_w+1] */
+        zhi = 0;
+        for (i = 0; i < size_w; ++i) {
+            /* invariants: -PyLong_BASE <= -q <= zhi <= 0;
+               -PyLong_BASE * q <= z < PyLong_BASE */
+            z = (sdigit)vk[i] + zhi -
+                (stwodigits)q * (stwodigits)w0[i];
+            vk[i] = (digit)z & PyLong_MASK;
+            zhi = (sdigit)Py_ARITHMETIC_RIGHT_SHIFT(stwodigits,
+                                            z, PyLong_SHIFT);
+        }
+
+        /* add w back if q was too large (this branch taken rarely) */
+        assert((sdigit)vtop + zhi == -1 || (sdigit)vtop + zhi == 0);
+        if ((sdigit)vtop + zhi < 0) {
+            carry = 0;
+            for (i = 0; i < size_w; ++i) {
+                carry += vk[i] + w0[i];
+                vk[i] = carry & PyLong_MASK;
+                carry >>= PyLong_SHIFT;
+            }
+            --q;
+        }
+
+        /* store quotient digit */
+        assert(q < PyLong_BASE);
+        *--ak = q;
+    }
+
+    /* unshift remainder; we reuse w to store the result */
+    carry = v_rshift(w0, v0, size_w, d);
+    assert(carry==0);
+    Py_DECREF(v);
+
+    *prem = long_normalize(w);
+    return long_normalize(a);
 }
 
 /* For a nonzero PyLong a, express a in the form x * 2**e, with 0.5 <=
@@ -2349,111 +2349,111 @@ x_divrem(PyLongObject *v1, PyLongObject *w1, PyLongObject **prem)
 double
 _PyLong_Frexp(PyLongObject *a, Py_ssize_t *e)
 {
-	Py_ssize_t a_size, a_bits, shift_digits, shift_bits, x_size;
-	/* See below for why x_digits is always large enough. */
-	digit rem, x_digits[2 + (DBL_MANT_DIG + 1) / PyLong_SHIFT];
-	double dx;
-	/* Correction term for round-half-to-even rounding.  For a digit x,
-	   "x + half_even_correction[x & 7]" gives x rounded to the nearest
-	   multiple of 4, rounding ties to a multiple of 8. */
-	static const int half_even_correction[8] = {0, -1, -2, 1, 0, -1, 2, 1};
-
-	a_size = ABS(Py_SIZE(a));
-	if (a_size == 0) {
-		/* Special case for 0: significand 0.0, exponent 0. */
-		*e = 0;
-		return 0.0;
-	}
-	a_bits = bits_in_digit(a->ob_digit[a_size-1]);
-	/* The following is an overflow-free version of the check
-	   "if ((a_size - 1) * PyLong_SHIFT + a_bits > PY_SSIZE_T_MAX) ..." */
-	if (a_size >= (PY_SSIZE_T_MAX - 1) / PyLong_SHIFT + 1 &&
-	    (a_size > (PY_SSIZE_T_MAX - 1) / PyLong_SHIFT + 1 ||
-	     a_bits > (PY_SSIZE_T_MAX - 1) % PyLong_SHIFT + 1))
-		 goto overflow;
-	a_bits = (a_size - 1) * PyLong_SHIFT + a_bits;
-
-	/* Shift the first DBL_MANT_DIG + 2 bits of a into x_digits[0:x_size]
-	   (shifting left if a_bits <= DBL_MANT_DIG + 2).
-
-	   Number of digits needed for result: write // for floor division.
-	   Then if shifting left, we end up using
-
-	     1 + a_size + (DBL_MANT_DIG + 2 - a_bits) // PyLong_SHIFT
-
-	   digits.  If shifting right, we use
-
-	     a_size - (a_bits - DBL_MANT_DIG - 2) // PyLong_SHIFT
-
-	   digits.  Using a_size = 1 + (a_bits - 1) // PyLong_SHIFT along with
-	   the inequalities
-
-	     m // PyLong_SHIFT + n // PyLong_SHIFT <= (m + n) // PyLong_SHIFT
-	     m // PyLong_SHIFT - n // PyLong_SHIFT <=
-	                                      1 + (m - n - 1) // PyLong_SHIFT,
-
-	   valid for any integers m and n, we find that x_size satisfies
-
-	     x_size <= 2 + (DBL_MANT_DIG + 1) // PyLong_SHIFT
-
-	   in both cases.
-	*/
-	if (a_bits <= DBL_MANT_DIG + 2) {
-		shift_digits = (DBL_MANT_DIG + 2 - a_bits) / PyLong_SHIFT;
-		shift_bits = (DBL_MANT_DIG + 2 - a_bits) % PyLong_SHIFT;
-		x_size = 0;
-		while (x_size < shift_digits)
-			x_digits[x_size++] = 0;
-		rem = v_lshift(x_digits + x_size, a->ob_digit, a_size,
-			       (int)shift_bits);
-		x_size += a_size;
-		x_digits[x_size++] = rem;
-	}
-	else {
-		shift_digits = (a_bits - DBL_MANT_DIG - 2) / PyLong_SHIFT;
-		shift_bits = (a_bits - DBL_MANT_DIG - 2) % PyLong_SHIFT;
-		rem = v_rshift(x_digits, a->ob_digit + shift_digits,
-			       a_size - shift_digits, (int)shift_bits);
-		x_size = a_size - shift_digits;
-		/* For correct rounding below, we need the least significant
-		   bit of x to be 'sticky' for this shift: if any of the bits
-		   shifted out was nonzero, we set the least significant bit
-		   of x. */
-		if (rem)
-			x_digits[0] |= 1;
-		else
-			while (shift_digits > 0)
-				if (a->ob_digit[--shift_digits]) {
-					x_digits[0] |= 1;
-					break;
-				}
-	}
-	assert(1 <= x_size && x_size <= (Py_ssize_t)(sizeof(x_digits)/sizeof(digit)));
-
-	/* Round, and convert to double. */
-	x_digits[0] += half_even_correction[x_digits[0] & 7];
-	dx = x_digits[--x_size];
-	while (x_size > 0)
-		dx = dx * PyLong_BASE + x_digits[--x_size];
-
-	/* Rescale;  make correction if result is 1.0. */
-	dx /= 4.0 * EXP2_DBL_MANT_DIG;
-	if (dx == 1.0) {
-		if (a_bits == PY_SSIZE_T_MAX)
-			goto overflow;
-		dx = 0.5;
-		a_bits += 1;
-	}
-
-	*e = a_bits;
-	return Py_SIZE(a) < 0 ? -dx : dx;
+    Py_ssize_t a_size, a_bits, shift_digits, shift_bits, x_size;
+    /* See below for why x_digits is always large enough. */
+    digit rem, x_digits[2 + (DBL_MANT_DIG + 1) / PyLong_SHIFT];
+    double dx;
+    /* Correction term for round-half-to-even rounding.  For a digit x,
+       "x + half_even_correction[x & 7]" gives x rounded to the nearest
+       multiple of 4, rounding ties to a multiple of 8. */
+    static const int half_even_correction[8] = {0, -1, -2, 1, 0, -1, 2, 1};
+
+    a_size = ABS(Py_SIZE(a));
+    if (a_size == 0) {
+        /* Special case for 0: significand 0.0, exponent 0. */
+        *e = 0;
+        return 0.0;
+    }
+    a_bits = bits_in_digit(a->ob_digit[a_size-1]);
+    /* The following is an overflow-free version of the check
+       "if ((a_size - 1) * PyLong_SHIFT + a_bits > PY_SSIZE_T_MAX) ..." */
+    if (a_size >= (PY_SSIZE_T_MAX - 1) / PyLong_SHIFT + 1 &&
+        (a_size > (PY_SSIZE_T_MAX - 1) / PyLong_SHIFT + 1 ||
+         a_bits > (PY_SSIZE_T_MAX - 1) % PyLong_SHIFT + 1))
+         goto overflow;
+    a_bits = (a_size - 1) * PyLong_SHIFT + a_bits;
+
+    /* Shift the first DBL_MANT_DIG + 2 bits of a into x_digits[0:x_size]
+       (shifting left if a_bits <= DBL_MANT_DIG + 2).
+
+       Number of digits needed for result: write // for floor division.
+       Then if shifting left, we end up using
+
+         1 + a_size + (DBL_MANT_DIG + 2 - a_bits) // PyLong_SHIFT
+
+       digits.  If shifting right, we use
+
+         a_size - (a_bits - DBL_MANT_DIG - 2) // PyLong_SHIFT
+
+       digits.  Using a_size = 1 + (a_bits - 1) // PyLong_SHIFT along with
+       the inequalities
+
+         m // PyLong_SHIFT + n // PyLong_SHIFT <= (m + n) // PyLong_SHIFT
+         m // PyLong_SHIFT - n // PyLong_SHIFT <=
+                                          1 + (m - n - 1) // PyLong_SHIFT,
+
+       valid for any integers m and n, we find that x_size satisfies
+
+         x_size <= 2 + (DBL_MANT_DIG + 1) // PyLong_SHIFT
+
+       in both cases.
+    */
+    if (a_bits <= DBL_MANT_DIG + 2) {
+        shift_digits = (DBL_MANT_DIG + 2 - a_bits) / PyLong_SHIFT;
+        shift_bits = (DBL_MANT_DIG + 2 - a_bits) % PyLong_SHIFT;
+        x_size = 0;
+        while (x_size < shift_digits)
+            x_digits[x_size++] = 0;
+        rem = v_lshift(x_digits + x_size, a->ob_digit, a_size,
+                       (int)shift_bits);
+        x_size += a_size;
+        x_digits[x_size++] = rem;
+    }
+    else {
+        shift_digits = (a_bits - DBL_MANT_DIG - 2) / PyLong_SHIFT;
+        shift_bits = (a_bits - DBL_MANT_DIG - 2) % PyLong_SHIFT;
+        rem = v_rshift(x_digits, a->ob_digit + shift_digits,
+                       a_size - shift_digits, (int)shift_bits);
+        x_size = a_size - shift_digits;
+        /* For correct rounding below, we need the least significant
+           bit of x to be 'sticky' for this shift: if any of the bits
+           shifted out was nonzero, we set the least significant bit
+           of x. */
+        if (rem)
+            x_digits[0] |= 1;
+        else
+            while (shift_digits > 0)
+                if (a->ob_digit[--shift_digits]) {
+                    x_digits[0] |= 1;
+                    break;
+                }
+    }
+    assert(1 <= x_size && x_size <= (Py_ssize_t)(sizeof(x_digits)/sizeof(digit)));
+
+    /* Round, and convert to double. */
+    x_digits[0] += half_even_correction[x_digits[0] & 7];
+    dx = x_digits[--x_size];
+    while (x_size > 0)
+        dx = dx * PyLong_BASE + x_digits[--x_size];
+
+    /* Rescale;  make correction if result is 1.0. */
+    dx /= 4.0 * EXP2_DBL_MANT_DIG;
+    if (dx == 1.0) {
+        if (a_bits == PY_SSIZE_T_MAX)
+            goto overflow;
+        dx = 0.5;
+        a_bits += 1;
+    }
+
+    *e = a_bits;
+    return Py_SIZE(a) < 0 ? -dx : dx;
 
   overflow:
-	/* exponent > PY_SSIZE_T_MAX */
-	PyErr_SetString(PyExc_OverflowError,
-			"huge integer: number of bits overflows a Py_ssize_t");
-	*e = 0;
-	return -1.0;
+    /* exponent > PY_SSIZE_T_MAX */
+    PyErr_SetString(PyExc_OverflowError,
+                    "huge integer: number of bits overflows a Py_ssize_t");
+    *e = 0;
+    return -1.0;
 }
 
 /* Get a C double from a long int object.  Rounds to the nearest double,
@@ -2462,20 +2462,20 @@ _PyLong_Frexp(PyLongObject *a, Py_ssize_t *e)
 double
 PyLong_AsDouble(PyObject *v)
 {
-	Py_ssize_t exponent;
-	double x;
-
-	if (v == NULL || !PyLong_Check(v)) {
-		PyErr_BadInternalCall();
-		return -1.0;
-	}
-	x = _PyLong_Frexp((PyLongObject *)v, &exponent);
-	if ((x == -1.0 && PyErr_Occurred()) || exponent > DBL_MAX_EXP) {
-		PyErr_SetString(PyExc_OverflowError,
-				"long int too large to convert to float");
-		return -1.0;
-	}
-	return ldexp(x, (int)exponent);
+    Py_ssize_t exponent;
+    double x;
+
+    if (v == NULL || !PyLong_Check(v)) {
+        PyErr_BadInternalCall();
+        return -1.0;
+    }
+    x = _PyLong_Frexp((PyLongObject *)v, &exponent);
+    if ((x == -1.0 && PyErr_Occurred()) || exponent > DBL_MAX_EXP) {
+        PyErr_SetString(PyExc_OverflowError,
+                        "long int too large to convert to float");
+        return -1.0;
+    }
+    return ldexp(x, (int)exponent);
 }
 
 /* Methods */
@@ -2483,109 +2483,109 @@ PyLong_AsDouble(PyObject *v)
 static void
 long_dealloc(PyObject *v)
 {
-	Py_TYPE(v)->tp_free(v);
+    Py_TYPE(v)->tp_free(v);
 }
 
 static int
 long_compare(PyLongObject *a, PyLongObject *b)
 {
-	Py_ssize_t sign;
-
-	if (Py_SIZE(a) != Py_SIZE(b)) {
-		sign = Py_SIZE(a) - Py_SIZE(b);
-	}
-	else {
-		Py_ssize_t i = ABS(Py_SIZE(a));
-		while (--i >= 0 && a->ob_digit[i] == b->ob_digit[i])
-			;
-		if (i < 0)
-			sign = 0;
-		else {
-			sign = (sdigit)a->ob_digit[i] - (sdigit)b->ob_digit[i];
-			if (Py_SIZE(a) < 0)
-				sign = -sign;
-		}
-	}
-	return sign < 0 ? -1 : sign > 0 ? 1 : 0;
+    Py_ssize_t sign;
+
+    if (Py_SIZE(a) != Py_SIZE(b)) {
+        sign = Py_SIZE(a) - Py_SIZE(b);
+    }
+    else {
+        Py_ssize_t i = ABS(Py_SIZE(a));
+        while (--i >= 0 && a->ob_digit[i] == b->ob_digit[i])
+            ;
+        if (i < 0)
+            sign = 0;
+        else {
+            sign = (sdigit)a->ob_digit[i] - (sdigit)b->ob_digit[i];
+            if (Py_SIZE(a) < 0)
+                sign = -sign;
+        }
+    }
+    return sign < 0 ? -1 : sign > 0 ? 1 : 0;
 }
 
 #define TEST_COND(cond) \
-	((cond) ? Py_True : Py_False)
+    ((cond) ? Py_True : Py_False)
 
 static PyObject *
 long_richcompare(PyObject *self, PyObject *other, int op)
 {
-	int result;
-	PyObject *v;
-	CHECK_BINOP(self, other);
-	if (self == other)
-		result = 0;
-	else
-		result = long_compare((PyLongObject*)self, (PyLongObject*)other);
-	/* Convert the return value to a Boolean */
-	switch (op) {
-	case Py_EQ:
-		v = TEST_COND(result == 0);
-		break;
-	case Py_NE:
-		v = TEST_COND(result != 0);
-		break;
-	case Py_LE:
-		v = TEST_COND(result <= 0);
-		break;
-	case Py_GE:
-		v = TEST_COND(result >= 0);
-		break;
-	case Py_LT:
-		v = TEST_COND(result == -1);
-		break;
-	case Py_GT:
-		v = TEST_COND(result == 1);
-		break;
-	default:
-		PyErr_BadArgument();
-		return NULL;
-	}
-	Py_INCREF(v);
-	return v;
+    int result;
+    PyObject *v;
+    CHECK_BINOP(self, other);
+    if (self == other)
+        result = 0;
+    else
+        result = long_compare((PyLongObject*)self, (PyLongObject*)other);
+    /* Convert the return value to a Boolean */
+    switch (op) {
+    case Py_EQ:
+        v = TEST_COND(result == 0);
+        break;
+    case Py_NE:
+        v = TEST_COND(result != 0);
+        break;
+    case Py_LE:
+        v = TEST_COND(result <= 0);
+        break;
+    case Py_GE:
+        v = TEST_COND(result >= 0);
+        break;
+    case Py_LT:
+        v = TEST_COND(result == -1);
+        break;
+    case Py_GT:
+        v = TEST_COND(result == 1);
+        break;
+    default:
+        PyErr_BadArgument();
+        return NULL;
+    }
+    Py_INCREF(v);
+    return v;
 }
 
 static long
 long_hash(PyLongObject *v)
 {
-	unsigned long x;
-	Py_ssize_t i;
-	int sign;
-
-	i = Py_SIZE(v);
-	switch(i) {
-	case -1: return v->ob_digit[0]==1 ? -2 : -(sdigit)v->ob_digit[0];
-	case 0: return 0;
-	case 1: return v->ob_digit[0];
-	}
-	sign = 1;
-	x = 0;
-	if (i < 0) {
-		sign = -1;
-		i = -(i);
-	}
-	/* The following loop produces a C unsigned long x such that x is
-	   congruent to the absolute value of v modulo ULONG_MAX.  The
-	   resulting x is nonzero if and only if v is. */
-	while (--i >= 0) {
-		/* Force a native long #-bits (32 or 64) circular shift */
-		x = (x >> (8*SIZEOF_LONG-PyLong_SHIFT)) | (x << PyLong_SHIFT);
-		x += v->ob_digit[i];
-		/* If the addition above overflowed we compensate by
-		   incrementing.  This preserves the value modulo
-		   ULONG_MAX. */
-		if (x < v->ob_digit[i])
-			x++;
-	}
-	x = x * sign;
-	if (x == (unsigned long)-1)
-		x = (unsigned long)-2;
-	return (long)x;
+    unsigned long x;
+    Py_ssize_t i;
+    int sign;
+
+    i = Py_SIZE(v);
+    switch(i) {
+    case -1: return v->ob_digit[0]==1 ? -2 : -(sdigit)v->ob_digit[0];
+    case 0: return 0;
+    case 1: return v->ob_digit[0];
+    }
+    sign = 1;
+    x = 0;
+    if (i < 0) {
+        sign = -1;
+        i = -(i);
+    }
+    /* The following loop produces a C unsigned long x such that x is
+       congruent to the absolute value of v modulo ULONG_MAX.  The
+       resulting x is nonzero if and only if v is. */
+    while (--i >= 0) {
+        /* Force a native long #-bits (32 or 64) circular shift */
+        x = (x >> (8*SIZEOF_LONG-PyLong_SHIFT)) | (x << PyLong_SHIFT);
+        x += v->ob_digit[i];
+        /* If the addition above overflowed we compensate by
+           incrementing.  This preserves the value modulo
+           ULONG_MAX. */
+        if (x < v->ob_digit[i])
+            x++;
+    }
+    x = x * sign;
+    if (x == (unsigned long)-1)
+        x = (unsigned long)-2;
+    return (long)x;
 }
 
 
@@ -2594,33 +2594,33 @@ long_hash(PyLongObject *v)
 static PyLongObject *
 x_add(PyLongObject *a, PyLongObject *b)
 {
-	Py_ssize_t size_a = ABS(Py_SIZE(a)), size_b = ABS(Py_SIZE(b));
-	PyLongObject *z;
-	Py_ssize_t i;
-	digit carry = 0;
-
-	/* Ensure a is the larger of the two: */
-	if (size_a < size_b) {
-		{ PyLongObject *temp = a; a = b; b = temp; }
-		{ Py_ssize_t size_temp = size_a;
-		  size_a = size_b;
-		  size_b = size_temp; }
-	}
-	z = _PyLong_New(size_a+1);
-	if (z == NULL)
-		return NULL;
-	for (i = 0; i < size_b; ++i) {
-		carry += a->ob_digit[i] + b->ob_digit[i];
-		z->ob_digit[i] = carry & PyLong_MASK;
-		carry >>= PyLong_SHIFT;
-	}
-	for (; i < size_a; ++i) {
-		carry += a->ob_digit[i];
-		z->ob_digit[i] = carry & PyLong_MASK;
-		carry >>= PyLong_SHIFT;
-	}
-	z->ob_digit[i] = carry;
-	return long_normalize(z);
+    Py_ssize_t size_a = ABS(Py_SIZE(a)), size_b = ABS(Py_SIZE(b));
+    PyLongObject *z;
+    Py_ssize_t i;
+    digit carry = 0;
+
+    /* Ensure a is the larger of the two: */
+    if (size_a < size_b) {
+        { PyLongObject *temp = a; a = b; b = temp; }
+        { Py_ssize_t size_temp = size_a;
+          size_a = size_b;
+          size_b = size_temp; }
+    }
+    z = _PyLong_New(size_a+1);
+    if (z == NULL)
+        return NULL;
+    for (i = 0; i < size_b; ++i) {
+        carry += a->ob_digit[i] + b->ob_digit[i];
+        z->ob_digit[i] = carry & PyLong_MASK;
+        carry >>= PyLong_SHIFT;
+    }
+    for (; i < size_a; ++i) {
+        carry += a->ob_digit[i];
+        z->ob_digit[i] = carry & PyLong_MASK;
+        carry >>= PyLong_SHIFT;
+    }
+    z->ob_digit[i] = carry;
+    return long_normalize(z);
 }
 
 /* Subtract the absolute values of two integers. */
@@ -2628,113 +2628,113 @@ x_add(PyLongObject *a, PyLongObject *b)
 static PyLongObject *
 x_sub(PyLongObject *a, PyLongObject *b)
 {
-	Py_ssize_t size_a = ABS(Py_SIZE(a)), size_b = ABS(Py_SIZE(b));
-	PyLongObject *z;
-	Py_ssize_t i;
-	int sign = 1;
-	digit borrow = 0;
-
-	/* Ensure a is the larger of the two: */
-	if (size_a < size_b) {
-		sign = -1;
-		{ PyLongObject *temp = a; a = b; b = temp; }
-		{ Py_ssize_t size_temp = size_a;
-		  size_a = size_b;
-		  size_b = size_temp; }
-	}
-	else if (size_a == size_b) {
-		/* Find highest digit where a and b differ: */
-		i = size_a;
-		while (--i >= 0 && a->ob_digit[i] == b->ob_digit[i])
-			;
-		if (i < 0)
-			return (PyLongObject *)PyLong_FromLong(0);
-		if (a->ob_digit[i] < b->ob_digit[i]) {
-			sign = -1;
-			{ PyLongObject *temp = a; a = b; b = temp; }
-		}
-		size_a = size_b = i+1;
-	}
-	z = _PyLong_New(size_a);
-	if (z == NULL)
-		return NULL;
-	for (i = 0; i < size_b; ++i) {
-		/* The following assumes unsigned arithmetic
-		   works module 2**N for some N>PyLong_SHIFT. */
-		borrow = a->ob_digit[i] - b->ob_digit[i] - borrow;
-		z->ob_digit[i] = borrow & PyLong_MASK;
-		borrow >>= PyLong_SHIFT;
-		borrow &= 1; /* Keep only one sign bit */
-	}
-	for (; i < size_a; ++i) {
-		borrow = a->ob_digit[i] - borrow;
-		z->ob_digit[i] = borrow & PyLong_MASK;
-		borrow >>= PyLong_SHIFT;
-		borrow &= 1; /* Keep only one sign bit */
-	}
-	assert(borrow == 0);
-	if (sign < 0)
-		NEGATE(z);
-	return long_normalize(z);
+    Py_ssize_t size_a = ABS(Py_SIZE(a)), size_b = ABS(Py_SIZE(b));
+    PyLongObject *z;
+    Py_ssize_t i;
+    int sign = 1;
+    digit borrow = 0;
+
+    /* Ensure a is the larger of the two: */
+    if (size_a < size_b) {
+        sign = -1;
+        { PyLongObject *temp = a; a = b; b = temp; }
+        { Py_ssize_t size_temp = size_a;
+          size_a = size_b;
+          size_b = size_temp; }
+    }
+    else if (size_a == size_b) {
+        /* Find highest digit where a and b differ: */
+        i = size_a;
+        while (--i >= 0 && a->ob_digit[i] == b->ob_digit[i])
+            ;
+        if (i < 0)
+            return (PyLongObject *)PyLong_FromLong(0);
+        if (a->ob_digit[i] < b->ob_digit[i]) {
+            sign = -1;
+            { PyLongObject *temp = a; a = b; b = temp; }
+        }
+        size_a = size_b = i+1;
+    }
+    z = _PyLong_New(size_a);
+    if (z == NULL)
+        return NULL;
+    for (i = 0; i < size_b; ++i) {
+        /* The following assumes unsigned arithmetic
+           works module 2**N for some N>PyLong_SHIFT. */
+        borrow = a->ob_digit[i] - b->ob_digit[i] - borrow;
+        z->ob_digit[i] = borrow & PyLong_MASK;
+        borrow >>= PyLong_SHIFT;
+        borrow &= 1; /* Keep only one sign bit */
+    }
+    for (; i < size_a; ++i) {
+        borrow = a->ob_digit[i] - borrow;
+        z->ob_digit[i] = borrow & PyLong_MASK;
+        borrow >>= PyLong_SHIFT;
+        borrow &= 1; /* Keep only one sign bit */
+    }
+    assert(borrow == 0);
+    if (sign < 0)
+        NEGATE(z);
+    return long_normalize(z);
 }
 
 static PyObject *
 long_add(PyLongObject *a, PyLongObject *b)
 {
-	PyLongObject *z;
-
-	CHECK_BINOP(a, b);
-
-	if (ABS(Py_SIZE(a)) <= 1 && ABS(Py_SIZE(b)) <= 1) {
-		PyObject *result = PyLong_FromLong(MEDIUM_VALUE(a) +
-						  MEDIUM_VALUE(b));
-		return result;
-	}
-	if (Py_SIZE(a) < 0) {
-		if (Py_SIZE(b) < 0) {
-			z = x_add(a, b);
-			if (z != NULL && Py_SIZE(z) != 0)
-				Py_SIZE(z) = -(Py_SIZE(z));
-		}
-		else
-			z = x_sub(b, a);
-	}
-	else {
-		if (Py_SIZE(b) < 0)
-			z = x_sub(a, b);
-		else
-			z = x_add(a, b);
-	}
-	return (PyObject *)z;
+    PyLongObject *z;
+
+    CHECK_BINOP(a, b);
+
+    if (ABS(Py_SIZE(a)) <= 1 && ABS(Py_SIZE(b)) <= 1) {
+        PyObject *result = PyLong_FromLong(MEDIUM_VALUE(a) +
+                                          MEDIUM_VALUE(b));
+        return result;
+    }
+    if (Py_SIZE(a) < 0) {
+        if (Py_SIZE(b) < 0) {
+            z = x_add(a, b);
+            if (z != NULL && Py_SIZE(z) != 0)
+                Py_SIZE(z) = -(Py_SIZE(z));
+        }
+        else
+            z = x_sub(b, a);
+    }
+    else {
+        if (Py_SIZE(b) < 0)
+            z = x_sub(a, b);
+        else
+            z = x_add(a, b);
+    }
+    return (PyObject *)z;
 }
 
 static PyObject *
 long_sub(PyLongObject *a, PyLongObject *b)
 {
-	PyLongObject *z;
-
-	CHECK_BINOP(a, b);
-
-	if (ABS(Py_SIZE(a)) <= 1 && ABS(Py_SIZE(b)) <= 1) {
-		PyObject* r;
-		r = PyLong_FromLong(MEDIUM_VALUE(a)-MEDIUM_VALUE(b));
-		return r;
-	}
-	if (Py_SIZE(a) < 0) {
-		if (Py_SIZE(b) < 0)
-			z = x_sub(a, b);
-		else
-			z = x_add(a, b);
-		if (z != NULL && Py_SIZE(z) != 0)
-			Py_SIZE(z) = -(Py_SIZE(z));
-	}
-	else {
-		if (Py_SIZE(b) < 0)
-			z = x_add(a, b);
-		else
-			z = x_sub(a, b);
-	}
-	return (PyObject *)z;
+    PyLongObject *z;
+
+    CHECK_BINOP(a, b);
+
+    if (ABS(Py_SIZE(a)) <= 1 && ABS(Py_SIZE(b)) <= 1) {
+        PyObject* r;
+        r = PyLong_FromLong(MEDIUM_VALUE(a)-MEDIUM_VALUE(b));
+        return r;
+    }
+    if (Py_SIZE(a) < 0) {
+        if (Py_SIZE(b) < 0)
+            z = x_sub(a, b);
+        else
+            z = x_add(a, b);
+        if (z != NULL && Py_SIZE(z) != 0)
+            Py_SIZE(z) = -(Py_SIZE(z));
+    }
+    else {
+        if (Py_SIZE(b) < 0)
+            z = x_add(a, b);
+        else
+            z = x_sub(a, b);
+    }
+    return (PyObject *)z;
 }
 
 /* Grade school multiplication, ignoring the signs.
@@ -2743,85 +2743,85 @@ long_sub(PyLongObject *a, PyLongObject *b)
 static PyLongObject *
 x_mul(PyLongObject *a, PyLongObject *b)
 {
-	PyLongObject *z;
-	Py_ssize_t size_a = ABS(Py_SIZE(a));
-	Py_ssize_t size_b = ABS(Py_SIZE(b));
-	Py_ssize_t i;
-
-     	z = _PyLong_New(size_a + size_b);
-	if (z == NULL)
-		return NULL;
-
-	memset(z->ob_digit, 0, Py_SIZE(z) * sizeof(digit));
-	if (a == b) {
-		/* Efficient squaring per HAC, Algorithm 14.16:
-		 * http://www.cacr.math.uwaterloo.ca/hac/about/chap14.pdf
-		 * Gives slightly less than a 2x speedup when a == b,
-		 * via exploiting that each entry in the multiplication
-		 * pyramid appears twice (except for the size_a squares).
-		 */
-		for (i = 0; i < size_a; ++i) {
-			twodigits carry;
-			twodigits f = a->ob_digit[i];
-			digit *pz = z->ob_digit + (i << 1);
-			digit *pa = a->ob_digit + i + 1;
-			digit *paend = a->ob_digit + size_a;
-
-			SIGCHECK({
-				Py_DECREF(z);
-				return NULL;
-			})
-
-			carry = *pz + f * f;
-			*pz++ = (digit)(carry & PyLong_MASK);
-			carry >>= PyLong_SHIFT;
-			assert(carry <= PyLong_MASK);
-
-			/* Now f is added in twice in each column of the
-			 * pyramid it appears.  Same as adding f<<1 once.
-			 */
-			f <<= 1;
-			while (pa < paend) {
-				carry += *pz + *pa++ * f;
-				*pz++ = (digit)(carry & PyLong_MASK);
-				carry >>= PyLong_SHIFT;
-				assert(carry <= (PyLong_MASK << 1));
-			}
-			if (carry) {
-				carry += *pz;
-				*pz++ = (digit)(carry & PyLong_MASK);
-				carry >>= PyLong_SHIFT;
-			}
-			if (carry)
-				*pz += (digit)(carry & PyLong_MASK);
-			assert((carry >> PyLong_SHIFT) == 0);
-		}
-	}
-	else {	/* a is not the same as b -- gradeschool long mult */
-		for (i = 0; i < size_a; ++i) {
-			twodigits carry = 0;
-			twodigits f = a->ob_digit[i];
-			digit *pz = z->ob_digit + i;
-			digit *pb = b->ob_digit;
-			digit *pbend = b->ob_digit + size_b;
-
-			SIGCHECK({
-				Py_DECREF(z);
-				return NULL;
-			})
-
-			while (pb < pbend) {
-				carry += *pz + *pb++ * f;
-				*pz++ = (digit)(carry & PyLong_MASK);
-				carry >>= PyLong_SHIFT;
-				assert(carry <= PyLong_MASK);
-			}
-			if (carry)
-				*pz += (digit)(carry & PyLong_MASK);
-			assert((carry >> PyLong_SHIFT) == 0);
-		}
-	}
-	return long_normalize(z);
+    PyLongObject *z;
+    Py_ssize_t size_a = ABS(Py_SIZE(a));
+    Py_ssize_t size_b = ABS(Py_SIZE(b));
+    Py_ssize_t i;
+
+    z = _PyLong_New(size_a + size_b);
+    if (z == NULL)
+        return NULL;
+
+    memset(z->ob_digit, 0, Py_SIZE(z) * sizeof(digit));
+    if (a == b) {
+        /* Efficient squaring per HAC, Algorithm 14.16:
+         * http://www.cacr.math.uwaterloo.ca/hac/about/chap14.pdf
+         * Gives slightly less than a 2x speedup when a == b,
+         * via exploiting that each entry in the multiplication
+         * pyramid appears twice (except for the size_a squares).
+         */
+        for (i = 0; i < size_a; ++i) {
+            twodigits carry;
+            twodigits f = a->ob_digit[i];
+            digit *pz = z->ob_digit + (i << 1);
+            digit *pa = a->ob_digit + i + 1;
+            digit *paend = a->ob_digit + size_a;
+
+            SIGCHECK({
+                Py_DECREF(z);
+                return NULL;
+            })
+
+            carry = *pz + f * f;
+            *pz++ = (digit)(carry & PyLong_MASK);
+            carry >>= PyLong_SHIFT;
+            assert(carry <= PyLong_MASK);
+
+            /* Now f is added in twice in each column of the
+             * pyramid it appears.  Same as adding f<<1 once.
+             */
+            f <<= 1;
+            while (pa < paend) {
+                carry += *pz + *pa++ * f;
+                *pz++ = (digit)(carry & PyLong_MASK);
+                carry >>= PyLong_SHIFT;
+                assert(carry <= (PyLong_MASK << 1));
+            }
+            if (carry) {
+                carry += *pz;
+                *pz++ = (digit)(carry & PyLong_MASK);
+                carry >>= PyLong_SHIFT;
+            }
+            if (carry)
+                *pz += (digit)(carry & PyLong_MASK);
+            assert((carry >> PyLong_SHIFT) == 0);
+        }
+    }
+    else {      /* a is not the same as b -- gradeschool long mult */
+        for (i = 0; i < size_a; ++i) {
+            twodigits carry = 0;
+            twodigits f = a->ob_digit[i];
+            digit *pz = z->ob_digit + i;
+            digit *pb = b->ob_digit;
+            digit *pbend = b->ob_digit + size_b;
+
+            SIGCHECK({
+                Py_DECREF(z);
+                return NULL;
+            })
+
+            while (pb < pbend) {
+                carry += *pz + *pb++ * f;
+                *pz++ = (digit)(carry & PyLong_MASK);
+                carry >>= PyLong_SHIFT;
+                assert(carry <= PyLong_MASK);
+            }
+            if (carry)
+                *pz += (digit)(carry & PyLong_MASK);
+            assert((carry >> PyLong_SHIFT) == 0);
+        }
+    }
+    return long_normalize(z);
 }
 
 /* A helper for Karatsuba multiplication (k_mul).
@@ -2834,26 +2834,26 @@ x_mul(PyLongObject *a, PyLongObject *b)
 static int
 kmul_split(PyLongObject *n, Py_ssize_t size, PyLongObject **high, PyLongObject **low)
 {
-	PyLongObject *hi, *lo;
-	Py_ssize_t size_lo, size_hi;
-	const Py_ssize_t size_n = ABS(Py_SIZE(n));
-
-	size_lo = MIN(size_n, size);
-	size_hi = size_n - size_lo;
-
-	if ((hi = _PyLong_New(size_hi)) == NULL)
-		return -1;
-	if ((lo = _PyLong_New(size_lo)) == NULL) {
-		Py_DECREF(hi);
-		return -1;
-	}
-
-	memcpy(lo->ob_digit, n->ob_digit, size_lo * sizeof(digit));
-	memcpy(hi->ob_digit, n->ob_digit + size_lo, size_hi * sizeof(digit));
-
-	*high = long_normalize(hi);
-	*low = long_normalize(lo);
-	return 0;
+    PyLongObject *hi, *lo;
+    Py_ssize_t size_lo, size_hi;
+    const Py_ssize_t size_n = ABS(Py_SIZE(n));
+
+    size_lo = MIN(size_n, size);
+    size_hi = size_n - size_lo;
+
+    if ((hi = _PyLong_New(size_hi)) == NULL)
+        return -1;
+    if ((lo = _PyLong_New(size_lo)) == NULL) {
+        Py_DECREF(hi);
+        return -1;
+    }
+
+    memcpy(lo->ob_digit, n->ob_digit, size_lo * sizeof(digit));
+    memcpy(hi->ob_digit, n->ob_digit + size_lo, size_hi * sizeof(digit));
+
+    *high = long_normalize(hi);
+    *low = long_normalize(lo);
+    return 0;
 }
 
 static PyLongObject *k_lopsided_mul(PyLongObject *a, PyLongObject *b);
@@ -2865,169 +2865,169 @@ static PyLongObject *k_lopsided_mul(PyLongObject *a, PyLongObject *b);
 static PyLongObject *
 k_mul(PyLongObject *a, PyLongObject *b)
 {
-	Py_ssize_t asize = ABS(Py_SIZE(a));
-	Py_ssize_t bsize = ABS(Py_SIZE(b));
-	PyLongObject *ah = NULL;
-	PyLongObject *al = NULL;
-	PyLongObject *bh = NULL;
-	PyLongObject *bl = NULL;
-	PyLongObject *ret = NULL;
-	PyLongObject *t1, *t2, *t3;
-	Py_ssize_t shift;	/* the number of digits we split off */
-	Py_ssize_t i;
-
-	/* (ah*X+al)(bh*X+bl) = ah*bh*X*X + (ah*bl + al*bh)*X + al*bl
-	 * Let k = (ah+al)*(bh+bl) = ah*bl + al*bh  + ah*bh + al*bl
-	 * Then the original product is
-	 *     ah*bh*X*X + (k - ah*bh - al*bl)*X + al*bl
-	 * By picking X to be a power of 2, "*X" is just shifting, and it's
-	 * been reduced to 3 multiplies on numbers half the size.
-	 */
-
-	/* We want to split based on the larger number; fiddle so that b
-	 * is largest.
-	 */
-	if (asize > bsize) {
-		t1 = a;
-		a = b;
-		b = t1;
-
-		i = asize;
-		asize = bsize;
-		bsize = i;
-	}
-
-	/* Use gradeschool math when either number is too small. */
-	i = a == b ? KARATSUBA_SQUARE_CUTOFF : KARATSUBA_CUTOFF;
-	if (asize <= i) {
-		if (asize == 0)
-			return (PyLongObject *)PyLong_FromLong(0);
-		else
-			return x_mul(a, b);
-	}
-
-	/* If a is small compared to b, splitting on b gives a degenerate
-	 * case with ah==0, and Karatsuba may be (even much) less efficient
-	 * than "grade school" then.  However, we can still win, by viewing
-	 * b as a string of "big digits", each of width a->ob_size.  That
-	 * leads to a sequence of balanced calls to k_mul.
-	 */
-	if (2 * asize <= bsize)
-		return k_lopsided_mul(a, b);
-
-	/* Split a & b into hi & lo pieces. */
-	shift = bsize >> 1;
-	if (kmul_split(a, shift, &ah, &al) < 0) goto fail;
-	assert(Py_SIZE(ah) > 0);	/* the split isn't degenerate */
-
-	if (a == b) {
-		bh = ah;
-		bl = al;
-		Py_INCREF(bh);
-		Py_INCREF(bl);
-	}
-	else if (kmul_split(b, shift, &bh, &bl) < 0) goto fail;
-
-	/* The plan:
-	 * 1. Allocate result space (asize + bsize digits:  that's always
-	 *    enough).
-	 * 2. Compute ah*bh, and copy into result at 2*shift.
-	 * 3. Compute al*bl, and copy into result at 0.  Note that this
-	 *    can't overlap with #2.
-	 * 4. Subtract al*bl from the result, starting at shift.  This may
-	 *    underflow (borrow out of the high digit), but we don't care:
-	 *    we're effectively doing unsigned arithmetic mod
-	 *    BASE**(sizea + sizeb), and so long as the *final* result fits,
-	 *    borrows and carries out of the high digit can be ignored.
-	 * 5. Subtract ah*bh from the result, starting at shift.
-	 * 6. Compute (ah+al)*(bh+bl), and add it into the result starting
-	 *    at shift.
-	 */
-
-	/* 1. Allocate result space. */
-	ret = _PyLong_New(asize + bsize);
-	if (ret == NULL) goto fail;
+    Py_ssize_t asize = ABS(Py_SIZE(a));
+    Py_ssize_t bsize = ABS(Py_SIZE(b));
+    PyLongObject *ah = NULL;
+    PyLongObject *al = NULL;
+    PyLongObject *bh = NULL;
+    PyLongObject *bl = NULL;
+    PyLongObject *ret = NULL;
+    PyLongObject *t1, *t2, *t3;
+    Py_ssize_t shift;           /* the number of digits we split off */
+    Py_ssize_t i;
+
+    /* (ah*X+al)(bh*X+bl) = ah*bh*X*X + (ah*bl + al*bh)*X + al*bl
+     * Let k = (ah+al)*(bh+bl) = ah*bl + al*bh  + ah*bh + al*bl
+     * Then the original product is
+     *     ah*bh*X*X + (k - ah*bh - al*bl)*X + al*bl
+     * By picking X to be a power of 2, "*X" is just shifting, and it's
+     * been reduced to 3 multiplies on numbers half the size.
+     */
+
+    /* We want to split based on the larger number; fiddle so that b
+     * is largest.
+     */
+    if (asize > bsize) {
+        t1 = a;
+        a = b;
+        b = t1;
+
+        i = asize;
+        asize = bsize;
+        bsize = i;
+    }
+
+    /* Use gradeschool math when either number is too small. */
+    i = a == b ? KARATSUBA_SQUARE_CUTOFF : KARATSUBA_CUTOFF;
+    if (asize <= i) {
+        if (asize == 0)
+            return (PyLongObject *)PyLong_FromLong(0);
+        else
+            return x_mul(a, b);
+    }
+
+    /* If a is small compared to b, splitting on b gives a degenerate
+     * case with ah==0, and Karatsuba may be (even much) less efficient
+     * than "grade school" then.  However, we can still win, by viewing
+     * b as a string of "big digits", each of width a->ob_size.  That
+     * leads to a sequence of balanced calls to k_mul.
+     */
+    if (2 * asize <= bsize)
+        return k_lopsided_mul(a, b);
+
+    /* Split a & b into hi & lo pieces. */
+    shift = bsize >> 1;
+    if (kmul_split(a, shift, &ah, &al) < 0) goto fail;
+    assert(Py_SIZE(ah) > 0);            /* the split isn't degenerate */
+
+    if (a == b) {
+        bh = ah;
+        bl = al;
+        Py_INCREF(bh);
+        Py_INCREF(bl);
+    }
+    else if (kmul_split(b, shift, &bh, &bl) < 0) goto fail;
+
+    /* The plan:
+     * 1. Allocate result space (asize + bsize digits:  that's always
+     *    enough).
+     * 2. Compute ah*bh, and copy into result at 2*shift.
+     * 3. Compute al*bl, and copy into result at 0.  Note that this
+     *    can't overlap with #2.
+     * 4. Subtract al*bl from the result, starting at shift.  This may
+     *    underflow (borrow out of the high digit), but we don't care:
+     *    we're effectively doing unsigned arithmetic mod
+     *    BASE**(sizea + sizeb), and so long as the *final* result fits,
+     *    borrows and carries out of the high digit can be ignored.
+     * 5. Subtract ah*bh from the result, starting at shift.
+     * 6. Compute (ah+al)*(bh+bl), and add it into the result starting
+     *    at shift.
+     */
+
+    /* 1. Allocate result space. */
+    ret = _PyLong_New(asize + bsize);
+    if (ret == NULL) goto fail;
 #ifdef Py_DEBUG
-	/* Fill with trash, to catch reference to uninitialized digits. */
-	memset(ret->ob_digit, 0xDF, Py_SIZE(ret) * sizeof(digit));
+    /* Fill with trash, to catch reference to uninitialized digits. */
+    memset(ret->ob_digit, 0xDF, Py_SIZE(ret) * sizeof(digit));
 #endif
 
-	/* 2. t1 <- ah*bh, and copy into high digits of result. */
-	if ((t1 = k_mul(ah, bh)) == NULL) goto fail;
-	assert(Py_SIZE(t1) >= 0);
-	assert(2*shift + Py_SIZE(t1) <= Py_SIZE(ret));
-	memcpy(ret->ob_digit + 2*shift, t1->ob_digit,
-	       Py_SIZE(t1) * sizeof(digit));
-
-	/* Zero-out the digits higher than the ah*bh copy. */
-	i = Py_SIZE(ret) - 2*shift - Py_SIZE(t1);
-	if (i)
-		memset(ret->ob_digit + 2*shift + Py_SIZE(t1), 0,
-		       i * sizeof(digit));
-
-	/* 3. t2 <- al*bl, and copy into the low digits. */
-	if ((t2 = k_mul(al, bl)) == NULL) {
-		Py_DECREF(t1);
-		goto fail;
-	}
-	assert(Py_SIZE(t2) >= 0);
-	assert(Py_SIZE(t2) <= 2*shift); /* no overlap with high digits */
-	memcpy(ret->ob_digit, t2->ob_digit, Py_SIZE(t2) * sizeof(digit));
-
-	/* Zero out remaining digits. */
-	i = 2*shift - Py_SIZE(t2);	/* number of uninitialized digits */
-	if (i)
-		memset(ret->ob_digit + Py_SIZE(t2), 0, i * sizeof(digit));
-
-	/* 4 & 5. Subtract ah*bh (t1) and al*bl (t2).  We do al*bl first
-	 * because it's fresher in cache.
-	 */
-	i = Py_SIZE(ret) - shift;  /* # digits after shift */
-	(void)v_isub(ret->ob_digit + shift, i, t2->ob_digit, Py_SIZE(t2));
-	Py_DECREF(t2);
-
-	(void)v_isub(ret->ob_digit + shift, i, t1->ob_digit, Py_SIZE(t1));
-	Py_DECREF(t1);
-
-	/* 6. t3 <- (ah+al)(bh+bl), and add into result. */
-	if ((t1 = x_add(ah, al)) == NULL) goto fail;
-	Py_DECREF(ah);
-	Py_DECREF(al);
-	ah = al = NULL;
-
-	if (a == b) {
-		t2 = t1;
-		Py_INCREF(t2);
-	}
-	else if ((t2 = x_add(bh, bl)) == NULL) {
-		Py_DECREF(t1);
-		goto fail;
-	}
-	Py_DECREF(bh);
-	Py_DECREF(bl);
-	bh = bl = NULL;
-
-	t3 = k_mul(t1, t2);
-	Py_DECREF(t1);
-	Py_DECREF(t2);
-	if (t3 == NULL) goto fail;
-	assert(Py_SIZE(t3) >= 0);
-
-	/* Add t3.  It's not obvious why we can't run out of room here.
-	 * See the (*) comment after this function.
-	 */
-	(void)v_iadd(ret->ob_digit + shift, i, t3->ob_digit, Py_SIZE(t3));
-	Py_DECREF(t3);
-
-	return long_normalize(ret);
+    /* 2. t1 <- ah*bh, and copy into high digits of result. */
+    if ((t1 = k_mul(ah, bh)) == NULL) goto fail;
+    assert(Py_SIZE(t1) >= 0);
+    assert(2*shift + Py_SIZE(t1) <= Py_SIZE(ret));
+    memcpy(ret->ob_digit + 2*shift, t1->ob_digit,
+           Py_SIZE(t1) * sizeof(digit));
+
+    /* Zero-out the digits higher than the ah*bh copy. */
+    i = Py_SIZE(ret) - 2*shift - Py_SIZE(t1);
+    if (i)
+        memset(ret->ob_digit + 2*shift + Py_SIZE(t1), 0,
+               i * sizeof(digit));
+
+    /* 3. t2 <- al*bl, and copy into the low digits. */
+    if ((t2 = k_mul(al, bl)) == NULL) {
+        Py_DECREF(t1);
+        goto fail;
+    }
+    assert(Py_SIZE(t2) >= 0);
+    assert(Py_SIZE(t2) <= 2*shift); /* no overlap with high digits */
+    memcpy(ret->ob_digit, t2->ob_digit, Py_SIZE(t2) * sizeof(digit));
+
+    /* Zero out remaining digits. */
+    i = 2*shift - Py_SIZE(t2);          /* number of uninitialized digits */
+    if (i)
+        memset(ret->ob_digit + Py_SIZE(t2), 0, i * sizeof(digit));
+
+    /* 4 & 5. Subtract ah*bh (t1) and al*bl (t2).  We do al*bl first
+     * because it's fresher in cache.
+     */
+    i = Py_SIZE(ret) - shift;  /* # digits after shift */
+    (void)v_isub(ret->ob_digit + shift, i, t2->ob_digit, Py_SIZE(t2));
+    Py_DECREF(t2);
+
+    (void)v_isub(ret->ob_digit + shift, i, t1->ob_digit, Py_SIZE(t1));
+    Py_DECREF(t1);
+
+    /* 6. t3 <- (ah+al)(bh+bl), and add into result. */
+    if ((t1 = x_add(ah, al)) == NULL) goto fail;
+    Py_DECREF(ah);
+    Py_DECREF(al);
+    ah = al = NULL;
+
+    if (a == b) {
+        t2 = t1;
+        Py_INCREF(t2);
+    }
+    else if ((t2 = x_add(bh, bl)) == NULL) {
+        Py_DECREF(t1);
+        goto fail;
+    }
+    Py_DECREF(bh);
+    Py_DECREF(bl);
+    bh = bl = NULL;
+
+    t3 = k_mul(t1, t2);
+    Py_DECREF(t1);
+    Py_DECREF(t2);
+    if (t3 == NULL) goto fail;
+    assert(Py_SIZE(t3) >= 0);
+
+    /* Add t3.  It's not obvious why we can't run out of room here.
+     * See the (*) comment after this function.
+     */
+    (void)v_iadd(ret->ob_digit + shift, i, t3->ob_digit, Py_SIZE(t3));
+    Py_DECREF(t3);
+
+    return long_normalize(ret);
 
  fail:
- 	Py_XDECREF(ret);
-	Py_XDECREF(ah);
-	Py_XDECREF(al);
-	Py_XDECREF(bh);
-	Py_XDECREF(bl);
-	return NULL;
+    Py_XDECREF(ret);
+    Py_XDECREF(ah);
+    Py_XDECREF(al);
+    Py_XDECREF(bh);
+    Py_XDECREF(bl);
+    return NULL;
 }
 
 /* (*) Why adding t3 can't "run out of room" above.
@@ -3086,85 +3086,85 @@ ah*bh and al*bl too.
 static PyLongObject *
 k_lopsided_mul(PyLongObject *a, PyLongObject *b)
 {
-	const Py_ssize_t asize = ABS(Py_SIZE(a));
-	Py_ssize_t bsize = ABS(Py_SIZE(b));
-	Py_ssize_t nbdone;	/* # of b digits already multiplied */
-	PyLongObject *ret;
-	PyLongObject *bslice = NULL;
-
-	assert(asize > KARATSUBA_CUTOFF);
-	assert(2 * asize <= bsize);
-
-	/* Allocate result space, and zero it out. */
-	ret = _PyLong_New(asize + bsize);
-	if (ret == NULL)
-		return NULL;
-	memset(ret->ob_digit, 0, Py_SIZE(ret) * sizeof(digit));
-
-	/* Successive slices of b are copied into bslice. */
-	bslice = _PyLong_New(asize);
-	if (bslice == NULL)
-		goto fail;
-
-	nbdone = 0;
-	while (bsize > 0) {
-		PyLongObject *product;
-		const Py_ssize_t nbtouse = MIN(bsize, asize);
-
-		/* Multiply the next slice of b by a. */
-		memcpy(bslice->ob_digit, b->ob_digit + nbdone,
-		       nbtouse * sizeof(digit));
-		Py_SIZE(bslice) = nbtouse;
-		product = k_mul(a, bslice);
-		if (product == NULL)
-			goto fail;
-
-		/* Add into result. */
-		(void)v_iadd(ret->ob_digit + nbdone, Py_SIZE(ret) - nbdone,
-			     product->ob_digit, Py_SIZE(product));
-		Py_DECREF(product);
-
-		bsize -= nbtouse;
-		nbdone += nbtouse;
-	}
-
-	Py_DECREF(bslice);
-	return long_normalize(ret);
+    const Py_ssize_t asize = ABS(Py_SIZE(a));
+    Py_ssize_t bsize = ABS(Py_SIZE(b));
+    Py_ssize_t nbdone;          /* # of b digits already multiplied */
+    PyLongObject *ret;
+    PyLongObject *bslice = NULL;
+
+    assert(asize > KARATSUBA_CUTOFF);
+    assert(2 * asize <= bsize);
+
+    /* Allocate result space, and zero it out. */
+    ret = _PyLong_New(asize + bsize);
+    if (ret == NULL)
+        return NULL;
+    memset(ret->ob_digit, 0, Py_SIZE(ret) * sizeof(digit));
+
+    /* Successive slices of b are copied into bslice. */
+    bslice = _PyLong_New(asize);
+    if (bslice == NULL)
+        goto fail;
+
+    nbdone = 0;
+    while (bsize > 0) {
+        PyLongObject *product;
+        const Py_ssize_t nbtouse = MIN(bsize, asize);
+
+        /* Multiply the next slice of b by a. */
+        memcpy(bslice->ob_digit, b->ob_digit + nbdone,
+               nbtouse * sizeof(digit));
+        Py_SIZE(bslice) = nbtouse;
+        product = k_mul(a, bslice);
+        if (product == NULL)
+            goto fail;
+
+        /* Add into result. */
+        (void)v_iadd(ret->ob_digit + nbdone, Py_SIZE(ret) - nbdone,
+                     product->ob_digit, Py_SIZE(product));
+        Py_DECREF(product);
+
+        bsize -= nbtouse;
+        nbdone += nbtouse;
+    }
+
+    Py_DECREF(bslice);
+    return long_normalize(ret);
 
  fail:
-	Py_DECREF(ret);
-	Py_XDECREF(bslice);
-	return NULL;
+    Py_DECREF(ret);
+    Py_XDECREF(bslice);
+    return NULL;
 }
 
 static PyObject *
 long_mul(PyLongObject *a, PyLongObject *b)
 {
-	PyLongObject *z;
+    PyLongObject *z;
 
-	CHECK_BINOP(a, b);
+    CHECK_BINOP(a, b);
 
-	/* fast path for single-digit multiplication */
-	if (ABS(Py_SIZE(a)) <= 1 && ABS(Py_SIZE(b)) <= 1) {
-		stwodigits v = (stwodigits)(MEDIUM_VALUE(a)) * MEDIUM_VALUE(b);
+    /* fast path for single-digit multiplication */
+    if (ABS(Py_SIZE(a)) <= 1 && ABS(Py_SIZE(b)) <= 1) {
+        stwodigits v = (stwodigits)(MEDIUM_VALUE(a)) * MEDIUM_VALUE(b);
 #ifdef HAVE_LONG_LONG
-		return PyLong_FromLongLong((PY_LONG_LONG)v);
+        return PyLong_FromLongLong((PY_LONG_LONG)v);
 #else
-		/* if we don't have long long then we're almost certainly
-		   using 15-bit digits, so v will fit in a long.  In the
-		   unlikely event that we're using 30-bit digits on a platform
-		   without long long, a large v will just cause us to fall
-		   through to the general multiplication code below. */
-		if (v >= LONG_MIN && v <= LONG_MAX)
-			return PyLong_FromLong((long)v);
+        /* if we don't have long long then we're almost certainly
+           using 15-bit digits, so v will fit in a long.  In the
+           unlikely event that we're using 30-bit digits on a platform
+           without long long, a large v will just cause us to fall
+           through to the general multiplication code below. */
+        if (v >= LONG_MIN && v <= LONG_MAX)
+            return PyLong_FromLong((long)v);
 #endif
-	}
+    }
 
-	z = k_mul(a, b);
-	/* Negate if exactly one of the inputs is negative. */
-	if (((Py_SIZE(a) ^ Py_SIZE(b)) < 0) && z)
-		NEGATE(z);
-	return (PyObject *)z;
+    z = k_mul(a, b);
+    /* Negate if exactly one of the inputs is negative. */
+    if (((Py_SIZE(a) ^ Py_SIZE(b)) < 0) && z)
+        NEGATE(z);
+    return (PyObject *)z;
 }
 
 /* The / and % operators are now defined in terms of divmod().
@@ -3173,11 +3173,11 @@ long_mul(PyLongObject *a, PyLongObject *b)
    |a| by |b|, with the sign of a.  This is also expressed
    as a - b*trunc(a/b), if trunc truncates towards zero.
    Some examples:
-   	 a	 b	a rem b		a mod b
-   	 13	 10	 3		 3
-   	-13	 10	-3		 7
-   	 13	-10	 3		-7
-   	-13	-10	-3		-3
+     a           b      a rem b         a mod b
+     13          10      3               3
+    -13          10     -3               7
+     13         -10      3              -7
+    -13         -10     -3              -3
    So, to get from rem to mod, we have to add b if a and b
    have different signs.  We then subtract one from the 'div'
    part of the outcome to keep the invariant intact. */
@@ -3190,57 +3190,57 @@ long_mul(PyLongObject *a, PyLongObject *b)
  */
 static int
 l_divmod(PyLongObject *v, PyLongObject *w,
-	 PyLongObject **pdiv, PyLongObject **pmod)
+         PyLongObject **pdiv, PyLongObject **pmod)
 {
-	PyLongObject *div, *mod;
-
-	if (long_divrem(v, w, &div, &mod) < 0)
-		return -1;
-	if ((Py_SIZE(mod) < 0 && Py_SIZE(w) > 0) ||
-	    (Py_SIZE(mod) > 0 && Py_SIZE(w) < 0)) {
-		PyLongObject *temp;
-		PyLongObject *one;
-		temp = (PyLongObject *) long_add(mod, w);
-		Py_DECREF(mod);
-		mod = temp;
-		if (mod == NULL) {
-			Py_DECREF(div);
-			return -1;
-		}
-		one = (PyLongObject *) PyLong_FromLong(1L);
-		if (one == NULL ||
-		    (temp = (PyLongObject *) long_sub(div, one)) == NULL) {
-			Py_DECREF(mod);
-			Py_DECREF(div);
-			Py_XDECREF(one);
-			return -1;
-		}
-		Py_DECREF(one);
-		Py_DECREF(div);
-		div = temp;
-	}
-	if (pdiv != NULL)
-		*pdiv = div;
-	else
-		Py_DECREF(div);
-
-	if (pmod != NULL)
-		*pmod = mod;
-	else
-		Py_DECREF(mod);
-
-	return 0;
+    PyLongObject *div, *mod;
+
+    if (long_divrem(v, w, &div, &mod) < 0)
+        return -1;
+    if ((Py_SIZE(mod) < 0 && Py_SIZE(w) > 0) ||
+        (Py_SIZE(mod) > 0 && Py_SIZE(w) < 0)) {
+        PyLongObject *temp;
+        PyLongObject *one;
+        temp = (PyLongObject *) long_add(mod, w);
+        Py_DECREF(mod);
+        mod = temp;
+        if (mod == NULL) {
+            Py_DECREF(div);
+            return -1;
+        }
+        one = (PyLongObject *) PyLong_FromLong(1L);
+        if (one == NULL ||
+            (temp = (PyLongObject *) long_sub(div, one)) == NULL) {
+            Py_DECREF(mod);
+            Py_DECREF(div);
+            Py_XDECREF(one);
+            return -1;
+        }
+        Py_DECREF(one);
+        Py_DECREF(div);
+        div = temp;
+    }
+    if (pdiv != NULL)
+        *pdiv = div;
+    else
+        Py_DECREF(div);
+
+    if (pmod != NULL)
+        *pmod = mod;
+    else
+        Py_DECREF(mod);
+
+    return 0;
 }
 
 static PyObject *
 long_div(PyObject *a, PyObject *b)
 {
-	PyLongObject *div;
+    PyLongObject *div;
 
-	CHECK_BINOP(a, b);
-	if (l_divmod((PyLongObject*)a, (PyLongObject*)b, &div, NULL) < 0)
-		div = NULL;
-	return (PyObject *)div;
+    CHECK_BINOP(a, b);
+    if (l_divmod((PyLongObject*)a, (PyLongObject*)b, &div, NULL) < 0)
+        div = NULL;
+    return (PyObject *)div;
 }
 
 /* PyLong/PyLong -> float, with correctly rounded result. */
@@ -3251,631 +3251,631 @@ long_div(PyObject *a, PyObject *b)
 static PyObject *
 long_true_divide(PyObject *v, PyObject *w)
 {
-	PyLongObject *a, *b, *x;
-	Py_ssize_t a_size, b_size, shift, extra_bits, diff, x_size, x_bits;
-	digit mask, low;
-	int inexact, negate, a_is_small, b_is_small;
-	double dx, result;
-
-	CHECK_BINOP(v, w);
-	a = (PyLongObject *)v;
-	b = (PyLongObject *)w;
-
-	/*
-	   Method in a nutshell:
-
-	     0. reduce to case a, b > 0; filter out obvious underflow/overflow
-	     1. choose a suitable integer 'shift'
-	     2. use integer arithmetic to compute x = floor(2**-shift*a/b)
-	     3. adjust x for correct rounding
-	     4. convert x to a double dx with the same value
-	     5. return ldexp(dx, shift).
-
-	   In more detail:
-
-	   0. For any a, a/0 raises ZeroDivisionError; for nonzero b, 0/b
-	   returns either 0.0 or -0.0, depending on the sign of b.  For a and
-	   b both nonzero, ignore signs of a and b, and add the sign back in
-	   at the end.  Now write a_bits and b_bits for the bit lengths of a
-	   and b respectively (that is, a_bits = 1 + floor(log_2(a)); likewise
-	   for b).  Then
-
-	      2**(a_bits - b_bits - 1) < a/b < 2**(a_bits - b_bits + 1).
-
-	   So if a_bits - b_bits > DBL_MAX_EXP then a/b > 2**DBL_MAX_EXP and
-	   so overflows.  Similarly, if a_bits - b_bits < DBL_MIN_EXP -
-	   DBL_MANT_DIG - 1 then a/b underflows to 0.  With these cases out of
-	   the way, we can assume that
-
-	      DBL_MIN_EXP - DBL_MANT_DIG - 1 <= a_bits - b_bits <= DBL_MAX_EXP.
-
-	   1. The integer 'shift' is chosen so that x has the right number of
-	   bits for a double, plus two or three extra bits that will be used
-	   in the rounding decisions.  Writing a_bits and b_bits for the
-	   number of significant bits in a and b respectively, a
-	   straightforward formula for shift is:
-
-	      shift = a_bits - b_bits - DBL_MANT_DIG - 2
-
-	   This is fine in the usual case, but if a/b is smaller than the
-	   smallest normal float then it can lead to double rounding on an
-	   IEEE 754 platform, giving incorrectly rounded results.  So we
-	   adjust the formula slightly.  The actual formula used is:
-
-	       shift = MAX(a_bits - b_bits, DBL_MIN_EXP) - DBL_MANT_DIG - 2
-
-	   2. The quantity x is computed by first shifting a (left -shift bits
-	   if shift <= 0, right shift bits if shift > 0) and then dividing by
-	   b.  For both the shift and the division, we keep track of whether
-	   the result is inexact, in a flag 'inexact'; this information is
-	   needed at the rounding stage.
-
-	   With the choice of shift above, together with our assumption that
-	   a_bits - b_bits >= DBL_MIN_EXP - DBL_MANT_DIG - 1, it follows
-	   that x >= 1.
-
-	   3. Now x * 2**shift <= a/b < (x+1) * 2**shift.  We want to replace
-	   this with an exactly representable float of the form
-
-	      round(x/2**extra_bits) * 2**(extra_bits+shift).
-
-	   For float representability, we need x/2**extra_bits <
-	   2**DBL_MANT_DIG and extra_bits + shift >= DBL_MIN_EXP -
-	   DBL_MANT_DIG.  This translates to the condition:
-
-	      extra_bits >= MAX(x_bits, DBL_MIN_EXP - shift) - DBL_MANT_DIG
-
-	   To round, we just modify the bottom digit of x in-place; this can
-	   end up giving a digit with value > PyLONG_MASK, but that's not a
-	   problem since digits can hold values up to 2*PyLONG_MASK+1.
-
-	   With the original choices for shift above, extra_bits will always
-	   be 2 or 3.  Then rounding under the round-half-to-even rule, we
-	   round up iff the most significant of the extra bits is 1, and
-	   either: (a) the computation of x in step 2 had an inexact result,
-	   or (b) at least one other of the extra bits is 1, or (c) the least
-	   significant bit of x (above those to be rounded) is 1.
-
-	   4. Conversion to a double is straightforward; all floating-point
-	   operations involved in the conversion are exact, so there's no
-	   danger of rounding errors.
-
-	   5. Use ldexp(x, shift) to compute x*2**shift, the final result.
-	   The result will always be exactly representable as a double, except
-	   in the case that it overflows.  To avoid dependence on the exact
-	   behaviour of ldexp on overflow, we check for overflow before
-	   applying ldexp.  The result of ldexp is adjusted for sign before
-	   returning.
-	*/
-
-	/* Reduce to case where a and b are both positive. */
-	a_size = ABS(Py_SIZE(a));
-	b_size = ABS(Py_SIZE(b));
-	negate = (Py_SIZE(a) < 0) ^ (Py_SIZE(b) < 0);
-	if (b_size == 0) {
-		PyErr_SetString(PyExc_ZeroDivisionError,
-				"division by zero");
-		goto error;
-	}
-	if (a_size == 0)
-		goto underflow_or_zero;
-
-	/* Fast path for a and b small (exactly representable in a double).
-	   Relies on floating-point division being correctly rounded; results
-	   may be subject to double rounding on x86 machines that operate with
-	   the x87 FPU set to 64-bit precision. */
-	a_is_small = a_size <= MANT_DIG_DIGITS ||
-		(a_size == MANT_DIG_DIGITS+1 &&
-		 a->ob_digit[MANT_DIG_DIGITS] >> MANT_DIG_BITS == 0);
-	b_is_small = b_size <= MANT_DIG_DIGITS ||
-		(b_size == MANT_DIG_DIGITS+1 &&
-		 b->ob_digit[MANT_DIG_DIGITS] >> MANT_DIG_BITS == 0);
-	if (a_is_small && b_is_small) {
-		double da, db;
-		da = a->ob_digit[--a_size];
-		while (a_size > 0)
-			da = da * PyLong_BASE + a->ob_digit[--a_size];
-		db = b->ob_digit[--b_size];
-		while (b_size > 0)
-			db = db * PyLong_BASE + b->ob_digit[--b_size];
-		result = da / db;
-		goto success;
-	}
-
-	/* Catch obvious cases of underflow and overflow */
-	diff = a_size - b_size;
-	if (diff > PY_SSIZE_T_MAX/PyLong_SHIFT - 1)
-		/* Extreme overflow */
-		goto overflow;
-	else if (diff < 1 - PY_SSIZE_T_MAX/PyLong_SHIFT)
-		/* Extreme underflow */
-		goto underflow_or_zero;
-	/* Next line is now safe from overflowing a Py_ssize_t */
-	diff = diff * PyLong_SHIFT + bits_in_digit(a->ob_digit[a_size - 1]) -
-		bits_in_digit(b->ob_digit[b_size - 1]);
-	/* Now diff = a_bits - b_bits. */
-	if (diff > DBL_MAX_EXP)
-		goto overflow;
-	else if (diff < DBL_MIN_EXP - DBL_MANT_DIG - 1)
-		goto underflow_or_zero;
-
-	/* Choose value for shift; see comments for step 1 above. */
-	shift = MAX(diff, DBL_MIN_EXP) - DBL_MANT_DIG - 2;
-
-	inexact = 0;
-
-	/* x = abs(a * 2**-shift) */
-	if (shift <= 0) {
-		Py_ssize_t i, shift_digits = -shift / PyLong_SHIFT;
-		digit rem;
-		/* x = a << -shift */
-		if (a_size >= PY_SSIZE_T_MAX - 1 - shift_digits) {
-			/* In practice, it's probably impossible to end up
-			   here.  Both a and b would have to be enormous,
-			   using close to SIZE_T_MAX bytes of memory each. */
-			PyErr_SetString(PyExc_OverflowError,
-				    "intermediate overflow during division");
-			goto error;
-		}
-		x = _PyLong_New(a_size + shift_digits + 1);
-		if (x == NULL)
-			goto error;
-		for (i = 0; i < shift_digits; i++)
-			x->ob_digit[i] = 0;
-		rem = v_lshift(x->ob_digit + shift_digits, a->ob_digit,
-			       a_size, -shift % PyLong_SHIFT);
-		x->ob_digit[a_size + shift_digits] = rem;
-	}
-	else {
-		Py_ssize_t shift_digits = shift / PyLong_SHIFT;
-		digit rem;
-		/* x = a >> shift */
-		assert(a_size >= shift_digits);
-		x = _PyLong_New(a_size - shift_digits);
-		if (x == NULL)
-			goto error;
-		rem = v_rshift(x->ob_digit, a->ob_digit + shift_digits,
-			       a_size - shift_digits, shift % PyLong_SHIFT);
-		/* set inexact if any of the bits shifted out is nonzero */
-		if (rem)
-			inexact = 1;
-		while (!inexact && shift_digits > 0)
-			if (a->ob_digit[--shift_digits])
-				inexact = 1;
-	}
-	long_normalize(x);
-	x_size = Py_SIZE(x);
-
-	/* x //= b. If the remainder is nonzero, set inexact.  We own the only
-	   reference to x, so it's safe to modify it in-place. */
-	if (b_size == 1) {
-		digit rem = inplace_divrem1(x->ob_digit, x->ob_digit, x_size,
-				      b->ob_digit[0]);
-		long_normalize(x);
-		if (rem)
-			inexact = 1;
-	}
-	else {
-		PyLongObject *div, *rem;
-		div = x_divrem(x, b, &rem);
-		Py_DECREF(x);
-		x = div;
-		if (x == NULL)
-			goto error;
-		if (Py_SIZE(rem))
-			inexact = 1;
-		Py_DECREF(rem);
-	}
-	x_size = ABS(Py_SIZE(x));
-	assert(x_size > 0); /* result of division is never zero */
-	x_bits = (x_size-1)*PyLong_SHIFT+bits_in_digit(x->ob_digit[x_size-1]);
-
-	/* The number of extra bits that have to be rounded away. */
-	extra_bits = MAX(x_bits, DBL_MIN_EXP - shift) - DBL_MANT_DIG;
-	assert(extra_bits == 2 || extra_bits == 3);
-
-	/* Round by directly modifying the low digit of x. */
-	mask = (digit)1 << (extra_bits - 1);
-	low = x->ob_digit[0] | inexact;
-	if (low & mask && low & (3*mask-1))
-		low += mask;
-	x->ob_digit[0] = low & ~(mask-1U);
-
-	/* Convert x to a double dx; the conversion is exact. */
-	dx = x->ob_digit[--x_size];
-	while (x_size > 0)
-		dx = dx * PyLong_BASE + x->ob_digit[--x_size];
-	Py_DECREF(x);
-
-	/* Check whether ldexp result will overflow a double. */
-	if (shift + x_bits >= DBL_MAX_EXP &&
-	    (shift + x_bits > DBL_MAX_EXP || dx == ldexp(1.0, (int)x_bits)))
-		goto overflow;
-	result = ldexp(dx, (int)shift);
+    PyLongObject *a, *b, *x;
+    Py_ssize_t a_size, b_size, shift, extra_bits, diff, x_size, x_bits;
+    digit mask, low;
+    int inexact, negate, a_is_small, b_is_small;
+    double dx, result;
+
+    CHECK_BINOP(v, w);
+    a = (PyLongObject *)v;
+    b = (PyLongObject *)w;
+
+    /*
+       Method in a nutshell:
+
+         0. reduce to case a, b > 0; filter out obvious underflow/overflow
+         1. choose a suitable integer 'shift'
+         2. use integer arithmetic to compute x = floor(2**-shift*a/b)
+         3. adjust x for correct rounding
+         4. convert x to a double dx with the same value
+         5. return ldexp(dx, shift).
+
+       In more detail:
+
+       0. For any a, a/0 raises ZeroDivisionError; for nonzero b, 0/b
+       returns either 0.0 or -0.0, depending on the sign of b.  For a and
+       b both nonzero, ignore signs of a and b, and add the sign back in
+       at the end.  Now write a_bits and b_bits for the bit lengths of a
+       and b respectively (that is, a_bits = 1 + floor(log_2(a)); likewise
+       for b).  Then
+
+          2**(a_bits - b_bits - 1) < a/b < 2**(a_bits - b_bits + 1).
+
+       So if a_bits - b_bits > DBL_MAX_EXP then a/b > 2**DBL_MAX_EXP and
+       so overflows.  Similarly, if a_bits - b_bits < DBL_MIN_EXP -
+       DBL_MANT_DIG - 1 then a/b underflows to 0.  With these cases out of
+       the way, we can assume that
+
+          DBL_MIN_EXP - DBL_MANT_DIG - 1 <= a_bits - b_bits <= DBL_MAX_EXP.
+
+       1. The integer 'shift' is chosen so that x has the right number of
+       bits for a double, plus two or three extra bits that will be used
+       in the rounding decisions.  Writing a_bits and b_bits for the
+       number of significant bits in a and b respectively, a
+       straightforward formula for shift is:
+
+          shift = a_bits - b_bits - DBL_MANT_DIG - 2
+
+       This is fine in the usual case, but if a/b is smaller than the
+       smallest normal float then it can lead to double rounding on an
+       IEEE 754 platform, giving incorrectly rounded results.  So we
+       adjust the formula slightly.  The actual formula used is:
+
+           shift = MAX(a_bits - b_bits, DBL_MIN_EXP) - DBL_MANT_DIG - 2
+
+       2. The quantity x is computed by first shifting a (left -shift bits
+       if shift <= 0, right shift bits if shift > 0) and then dividing by
+       b.  For both the shift and the division, we keep track of whether
+       the result is inexact, in a flag 'inexact'; this information is
+       needed at the rounding stage.
+
+       With the choice of shift above, together with our assumption that
+       a_bits - b_bits >= DBL_MIN_EXP - DBL_MANT_DIG - 1, it follows
+       that x >= 1.
+
+       3. Now x * 2**shift <= a/b < (x+1) * 2**shift.  We want to replace
+       this with an exactly representable float of the form
+
+          round(x/2**extra_bits) * 2**(extra_bits+shift).
+
+       For float representability, we need x/2**extra_bits <
+       2**DBL_MANT_DIG and extra_bits + shift >= DBL_MIN_EXP -
+       DBL_MANT_DIG.  This translates to the condition:
+
+          extra_bits >= MAX(x_bits, DBL_MIN_EXP - shift) - DBL_MANT_DIG
+
+       To round, we just modify the bottom digit of x in-place; this can
+       end up giving a digit with value > PyLONG_MASK, but that's not a
+       problem since digits can hold values up to 2*PyLONG_MASK+1.
+
+       With the original choices for shift above, extra_bits will always
+       be 2 or 3.  Then rounding under the round-half-to-even rule, we
+       round up iff the most significant of the extra bits is 1, and
+       either: (a) the computation of x in step 2 had an inexact result,
+       or (b) at least one other of the extra bits is 1, or (c) the least
+       significant bit of x (above those to be rounded) is 1.
+
+       4. Conversion to a double is straightforward; all floating-point
+       operations involved in the conversion are exact, so there's no
+       danger of rounding errors.
+
+       5. Use ldexp(x, shift) to compute x*2**shift, the final result.
+       The result will always be exactly representable as a double, except
+       in the case that it overflows.  To avoid dependence on the exact
+       behaviour of ldexp on overflow, we check for overflow before
+       applying ldexp.  The result of ldexp is adjusted for sign before
+       returning.
+    */
+
+    /* Reduce to case where a and b are both positive. */
+    a_size = ABS(Py_SIZE(a));
+    b_size = ABS(Py_SIZE(b));
+    negate = (Py_SIZE(a) < 0) ^ (Py_SIZE(b) < 0);
+    if (b_size == 0) {
+        PyErr_SetString(PyExc_ZeroDivisionError,
+                        "division by zero");
+        goto error;
+    }
+    if (a_size == 0)
+        goto underflow_or_zero;
+
+    /* Fast path for a and b small (exactly representable in a double).
+       Relies on floating-point division being correctly rounded; results
+       may be subject to double rounding on x86 machines that operate with
+       the x87 FPU set to 64-bit precision. */
+    a_is_small = a_size <= MANT_DIG_DIGITS ||
+        (a_size == MANT_DIG_DIGITS+1 &&
+         a->ob_digit[MANT_DIG_DIGITS] >> MANT_DIG_BITS == 0);
+    b_is_small = b_size <= MANT_DIG_DIGITS ||
+        (b_size == MANT_DIG_DIGITS+1 &&
+         b->ob_digit[MANT_DIG_DIGITS] >> MANT_DIG_BITS == 0);
+    if (a_is_small && b_is_small) {
+        double da, db;
+        da = a->ob_digit[--a_size];
+        while (a_size > 0)
+            da = da * PyLong_BASE + a->ob_digit[--a_size];
+        db = b->ob_digit[--b_size];
+        while (b_size > 0)
+            db = db * PyLong_BASE + b->ob_digit[--b_size];
+        result = da / db;
+        goto success;
+    }
+
+    /* Catch obvious cases of underflow and overflow */
+    diff = a_size - b_size;
+    if (diff > PY_SSIZE_T_MAX/PyLong_SHIFT - 1)
+        /* Extreme overflow */
+        goto overflow;
+    else if (diff < 1 - PY_SSIZE_T_MAX/PyLong_SHIFT)
+        /* Extreme underflow */
+        goto underflow_or_zero;
+    /* Next line is now safe from overflowing a Py_ssize_t */
+    diff = diff * PyLong_SHIFT + bits_in_digit(a->ob_digit[a_size - 1]) -
+        bits_in_digit(b->ob_digit[b_size - 1]);
+    /* Now diff = a_bits - b_bits. */
+    if (diff > DBL_MAX_EXP)
+        goto overflow;
+    else if (diff < DBL_MIN_EXP - DBL_MANT_DIG - 1)
+        goto underflow_or_zero;
+
+    /* Choose value for shift; see comments for step 1 above. */
+    shift = MAX(diff, DBL_MIN_EXP) - DBL_MANT_DIG - 2;
+
+    inexact = 0;
+
+    /* x = abs(a * 2**-shift) */
+    if (shift <= 0) {
+        Py_ssize_t i, shift_digits = -shift / PyLong_SHIFT;
+        digit rem;
+        /* x = a << -shift */
+        if (a_size >= PY_SSIZE_T_MAX - 1 - shift_digits) {
+            /* In practice, it's probably impossible to end up
+               here.  Both a and b would have to be enormous,
+               using close to SIZE_T_MAX bytes of memory each. */
+            PyErr_SetString(PyExc_OverflowError,
+                        "intermediate overflow during division");
+            goto error;
+        }
+        x = _PyLong_New(a_size + shift_digits + 1);
+        if (x == NULL)
+            goto error;
+        for (i = 0; i < shift_digits; i++)
+            x->ob_digit[i] = 0;
+        rem = v_lshift(x->ob_digit + shift_digits, a->ob_digit,
+                       a_size, -shift % PyLong_SHIFT);
+        x->ob_digit[a_size + shift_digits] = rem;
+    }
+    else {
+        Py_ssize_t shift_digits = shift / PyLong_SHIFT;
+        digit rem;
+        /* x = a >> shift */
+        assert(a_size >= shift_digits);
+        x = _PyLong_New(a_size - shift_digits);
+        if (x == NULL)
+            goto error;
+        rem = v_rshift(x->ob_digit, a->ob_digit + shift_digits,
+                       a_size - shift_digits, shift % PyLong_SHIFT);
+        /* set inexact if any of the bits shifted out is nonzero */
+        if (rem)
+            inexact = 1;
+        while (!inexact && shift_digits > 0)
+            if (a->ob_digit[--shift_digits])
+                inexact = 1;
+    }
+    long_normalize(x);
+    x_size = Py_SIZE(x);
+
+    /* x //= b. If the remainder is nonzero, set inexact.  We own the only
+       reference to x, so it's safe to modify it in-place. */
+    if (b_size == 1) {
+        digit rem = inplace_divrem1(x->ob_digit, x->ob_digit, x_size,
+                              b->ob_digit[0]);
+        long_normalize(x);
+        if (rem)
+            inexact = 1;
+    }
+    else {
+        PyLongObject *div, *rem;
+        div = x_divrem(x, b, &rem);
+        Py_DECREF(x);
+        x = div;
+        if (x == NULL)
+            goto error;
+        if (Py_SIZE(rem))
+            inexact = 1;
+        Py_DECREF(rem);
+    }
+    x_size = ABS(Py_SIZE(x));
+    assert(x_size > 0); /* result of division is never zero */
+    x_bits = (x_size-1)*PyLong_SHIFT+bits_in_digit(x->ob_digit[x_size-1]);
+
+    /* The number of extra bits that have to be rounded away. */
+    extra_bits = MAX(x_bits, DBL_MIN_EXP - shift) - DBL_MANT_DIG;
+    assert(extra_bits == 2 || extra_bits == 3);
+
+    /* Round by directly modifying the low digit of x. */
+    mask = (digit)1 << (extra_bits - 1);
+    low = x->ob_digit[0] | inexact;
+    if (low & mask && low & (3*mask-1))
+        low += mask;
+    x->ob_digit[0] = low & ~(mask-1U);
+
+    /* Convert x to a double dx; the conversion is exact. */
+    dx = x->ob_digit[--x_size];
+    while (x_size > 0)
+        dx = dx * PyLong_BASE + x->ob_digit[--x_size];
+    Py_DECREF(x);
+
+    /* Check whether ldexp result will overflow a double. */
+    if (shift + x_bits >= DBL_MAX_EXP &&
+        (shift + x_bits > DBL_MAX_EXP || dx == ldexp(1.0, (int)x_bits)))
+        goto overflow;
+    result = ldexp(dx, (int)shift);
 
   success:
-	return PyFloat_FromDouble(negate ? -result : result);
+    return PyFloat_FromDouble(negate ? -result : result);
 
   underflow_or_zero:
-	return PyFloat_FromDouble(negate ? -0.0 : 0.0);
+    return PyFloat_FromDouble(negate ? -0.0 : 0.0);
 
   overflow:
-	PyErr_SetString(PyExc_OverflowError,
-			"integer division result too large for a float");
+    PyErr_SetString(PyExc_OverflowError,
+                    "integer division result too large for a float");
   error:
-	return NULL;
+    return NULL;
 }
 
 static PyObject *
 long_mod(PyObject *a, PyObject *b)
 {
-	PyLongObject *mod;
-	
-	CHECK_BINOP(a, b);
+    PyLongObject *mod;
+
+    CHECK_BINOP(a, b);
 
-	if (l_divmod((PyLongObject*)a, (PyLongObject*)b, NULL, &mod) < 0)
-		mod = NULL;
-	return (PyObject *)mod;
+    if (l_divmod((PyLongObject*)a, (PyLongObject*)b, NULL, &mod) < 0)
+        mod = NULL;
+    return (PyObject *)mod;
 }
 
 static PyObject *
 long_divmod(PyObject *a, PyObject *b)
 {
-	PyLongObject *div, *mod;
-	PyObject *z;
-
-	CHECK_BINOP(a, b);
-
-	if (l_divmod((PyLongObject*)a, (PyLongObject*)b, &div, &mod) < 0) {
-		return NULL;
-	}
-	z = PyTuple_New(2);
-	if (z != NULL) {
-		PyTuple_SetItem(z, 0, (PyObject *) div);
-		PyTuple_SetItem(z, 1, (PyObject *) mod);
-	}
-	else {
-		Py_DECREF(div);
-		Py_DECREF(mod);
-	}
-	return z;
+    PyLongObject *div, *mod;
+    PyObject *z;
+
+    CHECK_BINOP(a, b);
+
+    if (l_divmod((PyLongObject*)a, (PyLongObject*)b, &div, &mod) < 0) {
+        return NULL;
+    }
+    z = PyTuple_New(2);
+    if (z != NULL) {
+        PyTuple_SetItem(z, 0, (PyObject *) div);
+        PyTuple_SetItem(z, 1, (PyObject *) mod);
+    }
+    else {
+        Py_DECREF(div);
+        Py_DECREF(mod);
+    }
+    return z;
 }
 
 /* pow(v, w, x) */
 static PyObject *
 long_pow(PyObject *v, PyObject *w, PyObject *x)
 {
-	PyLongObject *a, *b, *c; /* a,b,c = v,w,x */
-	int negativeOutput = 0;  /* if x<0 return negative output */
-
-	PyLongObject *z = NULL;  /* accumulated result */
-	Py_ssize_t i, j, k;             /* counters */
-	PyLongObject *temp = NULL;
-
-	/* 5-ary values.  If the exponent is large enough, table is
-	 * precomputed so that table[i] == a**i % c for i in range(32).
-	 */
-	PyLongObject *table[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-				   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
-
-	/* a, b, c = v, w, x */
-	CHECK_BINOP(v, w);
-	a = (PyLongObject*)v; Py_INCREF(a);
-	b = (PyLongObject*)w; Py_INCREF(b);
-	if (PyLong_Check(x)) {
-		c = (PyLongObject *)x;
-		Py_INCREF(x);
-	}
-	else if (x == Py_None)
-		c = NULL;
-	else {
-		Py_DECREF(a);
-		Py_DECREF(b);
-		Py_INCREF(Py_NotImplemented);
-		return Py_NotImplemented;
-	}
-
-	if (Py_SIZE(b) < 0) {  /* if exponent is negative */
-		if (c) {
-			PyErr_SetString(PyExc_TypeError, "pow() 2nd argument "
-			    "cannot be negative when 3rd argument specified");
-			goto Error;
-		}
-		else {
-			/* else return a float.  This works because we know
-			   that this calls float_pow() which converts its
-			   arguments to double. */
-			Py_DECREF(a);
-			Py_DECREF(b);
-			return PyFloat_Type.tp_as_number->nb_power(v, w, x);
-		}
-	}
-
-	if (c) {
-		/* if modulus == 0:
-		       raise ValueError() */
-		if (Py_SIZE(c) == 0) {
-			PyErr_SetString(PyExc_ValueError,
-					"pow() 3rd argument cannot be 0");
-			goto Error;
-		}
-
-		/* if modulus < 0:
-		       negativeOutput = True
-		       modulus = -modulus */
-		if (Py_SIZE(c) < 0) {
-			negativeOutput = 1;
-			temp = (PyLongObject *)_PyLong_Copy(c);
-			if (temp == NULL)
-				goto Error;
-			Py_DECREF(c);
-			c = temp;
-			temp = NULL;
-			NEGATE(c);
-		}
-
-		/* if modulus == 1:
-		       return 0 */
-		if ((Py_SIZE(c) == 1) && (c->ob_digit[0] == 1)) {
-			z = (PyLongObject *)PyLong_FromLong(0L);
-			goto Done;
-		}
-
-		/* if base < 0:
-		       base = base % modulus
-		   Having the base positive just makes things easier. */
-		if (Py_SIZE(a) < 0) {
-			if (l_divmod(a, c, NULL, &temp) < 0)
-				goto Error;
-			Py_DECREF(a);
-			a = temp;
-			temp = NULL;
-		}
-	}
-
-	/* At this point a, b, and c are guaranteed non-negative UNLESS
-	   c is NULL, in which case a may be negative. */
-
-	z = (PyLongObject *)PyLong_FromLong(1L);
-	if (z == NULL)
-		goto Error;
-
-	/* Perform a modular reduction, X = X % c, but leave X alone if c
-	 * is NULL.
-	 */
-#define REDUCE(X)					\
-	if (c != NULL) {				\
-		if (l_divmod(X, c, NULL, &temp) < 0)	\
-			goto Error;			\
-		Py_XDECREF(X);				\
-		X = temp;				\
-		temp = NULL;				\
-	}
-
-	/* Multiply two values, then reduce the result:
-	   result = X*Y % c.  If c is NULL, skip the mod. */
-#define MULT(X, Y, result)				\
-{							\
-	temp = (PyLongObject *)long_mul(X, Y);		\
-	if (temp == NULL)				\
-		goto Error;				\
-	Py_XDECREF(result);				\
-	result = temp;					\
-	temp = NULL;					\
-	REDUCE(result)					\
+    PyLongObject *a, *b, *c; /* a,b,c = v,w,x */
+    int negativeOutput = 0;  /* if x<0 return negative output */
+
+    PyLongObject *z = NULL;  /* accumulated result */
+    Py_ssize_t i, j, k;             /* counters */
+    PyLongObject *temp = NULL;
+
+    /* 5-ary values.  If the exponent is large enough, table is
+     * precomputed so that table[i] == a**i % c for i in range(32).
+     */
+    PyLongObject *table[32] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+                               0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+
+    /* a, b, c = v, w, x */
+    CHECK_BINOP(v, w);
+    a = (PyLongObject*)v; Py_INCREF(a);
+    b = (PyLongObject*)w; Py_INCREF(b);
+    if (PyLong_Check(x)) {
+        c = (PyLongObject *)x;
+        Py_INCREF(x);
+    }
+    else if (x == Py_None)
+        c = NULL;
+    else {
+        Py_DECREF(a);
+        Py_DECREF(b);
+        Py_INCREF(Py_NotImplemented);
+        return Py_NotImplemented;
+    }
+
+    if (Py_SIZE(b) < 0) {  /* if exponent is negative */
+        if (c) {
+            PyErr_SetString(PyExc_TypeError, "pow() 2nd argument "
+                "cannot be negative when 3rd argument specified");
+            goto Error;
+        }
+        else {
+            /* else return a float.  This works because we know
+               that this calls float_pow() which converts its
+               arguments to double. */
+            Py_DECREF(a);
+            Py_DECREF(b);
+            return PyFloat_Type.tp_as_number->nb_power(v, w, x);
+        }
+    }
+
+    if (c) {
+        /* if modulus == 0:
+               raise ValueError() */
+        if (Py_SIZE(c) == 0) {
+            PyErr_SetString(PyExc_ValueError,
+                            "pow() 3rd argument cannot be 0");
+            goto Error;
+        }
+
+        /* if modulus < 0:
+               negativeOutput = True
+               modulus = -modulus */
+        if (Py_SIZE(c) < 0) {
+            negativeOutput = 1;
+            temp = (PyLongObject *)_PyLong_Copy(c);
+            if (temp == NULL)
+                goto Error;
+            Py_DECREF(c);
+            c = temp;
+            temp = NULL;
+            NEGATE(c);
+        }
+
+        /* if modulus == 1:
+               return 0 */
+        if ((Py_SIZE(c) == 1) && (c->ob_digit[0] == 1)) {
+            z = (PyLongObject *)PyLong_FromLong(0L);
+            goto Done;
+        }
+
+        /* if base < 0:
+               base = base % modulus
+           Having the base positive just makes things easier. */
+        if (Py_SIZE(a) < 0) {
+            if (l_divmod(a, c, NULL, &temp) < 0)
+                goto Error;
+            Py_DECREF(a);
+            a = temp;
+            temp = NULL;
+        }
+    }
+
+    /* At this point a, b, and c are guaranteed non-negative UNLESS
+       c is NULL, in which case a may be negative. */
+
+    z = (PyLongObject *)PyLong_FromLong(1L);
+    if (z == NULL)
+        goto Error;
+
+    /* Perform a modular reduction, X = X % c, but leave X alone if c
+     * is NULL.
+     */
+#define REDUCE(X)                                       \
+    if (c != NULL) {                                    \
+        if (l_divmod(X, c, NULL, &temp) < 0)            \
+            goto Error;                                 \
+        Py_XDECREF(X);                                  \
+        X = temp;                                       \
+        temp = NULL;                                    \
+    }
+
+    /* Multiply two values, then reduce the result:
+       result = X*Y % c.  If c is NULL, skip the mod. */
+#define MULT(X, Y, result)                              \
+{                                                       \
+    temp = (PyLongObject *)long_mul(X, Y);              \
+    if (temp == NULL)                                   \
+        goto Error;                                     \
+    Py_XDECREF(result);                                 \
+    result = temp;                                      \
+    temp = NULL;                                        \
+    REDUCE(result)                                      \
 }
 
-	if (Py_SIZE(b) <= FIVEARY_CUTOFF) {
-		/* Left-to-right binary exponentiation (HAC Algorithm 14.79) */
-		/* http://www.cacr.math.uwaterloo.ca/hac/about/chap14.pdf    */
-		for (i = Py_SIZE(b) - 1; i >= 0; --i) {
-			digit bi = b->ob_digit[i];
-
-			for (j = (digit)1 << (PyLong_SHIFT-1); j != 0; j >>= 1) {
-				MULT(z, z, z)
-				if (bi & j)
-					MULT(z, a, z)
-			}
-		}
-	}
-	else {
-		/* Left-to-right 5-ary exponentiation (HAC Algorithm 14.82) */
-		Py_INCREF(z);	/* still holds 1L */
-		table[0] = z;
-		for (i = 1; i < 32; ++i)
-			MULT(table[i-1], a, table[i])
-
-		for (i = Py_SIZE(b) - 1; i >= 0; --i) {
-			const digit bi = b->ob_digit[i];
-
-			for (j = PyLong_SHIFT - 5; j >= 0; j -= 5) {
-				const int index = (bi >> j) & 0x1f;
-				for (k = 0; k < 5; ++k)
-					MULT(z, z, z)
-				if (index)
-					MULT(z, table[index], z)
-			}
-		}
-	}
-
-	if (negativeOutput && (Py_SIZE(z) != 0)) {
-		temp = (PyLongObject *)long_sub(z, c);
-		if (temp == NULL)
-			goto Error;
-		Py_DECREF(z);
-		z = temp;
-		temp = NULL;
-	}
-	goto Done;
+    if (Py_SIZE(b) <= FIVEARY_CUTOFF) {
+        /* Left-to-right binary exponentiation (HAC Algorithm 14.79) */
+        /* http://www.cacr.math.uwaterloo.ca/hac/about/chap14.pdf    */
+        for (i = Py_SIZE(b) - 1; i >= 0; --i) {
+            digit bi = b->ob_digit[i];
+
+            for (j = (digit)1 << (PyLong_SHIFT-1); j != 0; j >>= 1) {
+                MULT(z, z, z)
+                if (bi & j)
+                    MULT(z, a, z)
+            }
+        }
+    }
+    else {
+        /* Left-to-right 5-ary exponentiation (HAC Algorithm 14.82) */
+        Py_INCREF(z);           /* still holds 1L */
+        table[0] = z;
+        for (i = 1; i < 32; ++i)
+            MULT(table[i-1], a, table[i])
+
+        for (i = Py_SIZE(b) - 1; i >= 0; --i) {
+            const digit bi = b->ob_digit[i];
+
+            for (j = PyLong_SHIFT - 5; j >= 0; j -= 5) {
+                const int index = (bi >> j) & 0x1f;
+                for (k = 0; k < 5; ++k)
+                    MULT(z, z, z)
+                if (index)
+                    MULT(z, table[index], z)
+            }
+        }
+    }
+
+    if (negativeOutput && (Py_SIZE(z) != 0)) {
+        temp = (PyLongObject *)long_sub(z, c);
+        if (temp == NULL)
+            goto Error;
+        Py_DECREF(z);
+        z = temp;
+        temp = NULL;
+    }
+    goto Done;
 
  Error:
- 	if (z != NULL) {
- 		Py_DECREF(z);
- 		z = NULL;
- 	}
-	/* fall through */
+    if (z != NULL) {
+        Py_DECREF(z);
+        z = NULL;
+    }
+    /* fall through */
  Done:
-	if (Py_SIZE(b) > FIVEARY_CUTOFF) {
-		for (i = 0; i < 32; ++i)
-			Py_XDECREF(table[i]);
-	}
-	Py_DECREF(a);
-	Py_DECREF(b);
-	Py_XDECREF(c);
-	Py_XDECREF(temp);
-	return (PyObject *)z;
+    if (Py_SIZE(b) > FIVEARY_CUTOFF) {
+        for (i = 0; i < 32; ++i)
+            Py_XDECREF(table[i]);
+    }
+    Py_DECREF(a);
+    Py_DECREF(b);
+    Py_XDECREF(c);
+    Py_XDECREF(temp);
+    return (PyObject *)z;
 }
 
 static PyObject *
 long_invert(PyLongObject *v)
 {
-	/* Implement ~x as -(x+1) */
-	PyLongObject *x;
-	PyLongObject *w;
-	if (ABS(Py_SIZE(v)) <=1)
-		return PyLong_FromLong(-(MEDIUM_VALUE(v)+1));
-	w = (PyLongObject *)PyLong_FromLong(1L);
-	if (w == NULL)
-		return NULL;
-	x = (PyLongObject *) long_add(v, w);
-	Py_DECREF(w);
-	if (x == NULL)
-		return NULL;
-	Py_SIZE(x) = -(Py_SIZE(x));
-	return (PyObject *)maybe_small_long(x);
+    /* Implement ~x as -(x+1) */
+    PyLongObject *x;
+    PyLongObject *w;
+    if (ABS(Py_SIZE(v)) <=1)
+        return PyLong_FromLong(-(MEDIUM_VALUE(v)+1));
+    w = (PyLongObject *)PyLong_FromLong(1L);
+    if (w == NULL)
+        return NULL;
+    x = (PyLongObject *) long_add(v, w);
+    Py_DECREF(w);
+    if (x == NULL)
+        return NULL;
+    Py_SIZE(x) = -(Py_SIZE(x));
+    return (PyObject *)maybe_small_long(x);
 }
 
 static PyObject *
 long_neg(PyLongObject *v)
 {
-	PyLongObject *z;
-	if (ABS(Py_SIZE(v)) <= 1)
-		return PyLong_FromLong(-MEDIUM_VALUE(v));
-	z = (PyLongObject *)_PyLong_Copy(v);
-	if (z != NULL)
-		Py_SIZE(z) = -(Py_SIZE(v));
-	return (PyObject *)z;
+    PyLongObject *z;
+    if (ABS(Py_SIZE(v)) <= 1)
+        return PyLong_FromLong(-MEDIUM_VALUE(v));
+    z = (PyLongObject *)_PyLong_Copy(v);
+    if (z != NULL)
+        Py_SIZE(z) = -(Py_SIZE(v));
+    return (PyObject *)z;
 }
 
 static PyObject *
 long_abs(PyLongObject *v)
 {
-	if (Py_SIZE(v) < 0)
-		return long_neg(v);
-	else
-		return long_long((PyObject *)v);
+    if (Py_SIZE(v) < 0)
+        return long_neg(v);
+    else
+        return long_long((PyObject *)v);
 }
 
 static int
 long_bool(PyLongObject *v)
 {
-	return Py_SIZE(v) != 0;
+    return Py_SIZE(v) != 0;
 }
 
 static PyObject *
 long_rshift(PyLongObject *a, PyLongObject *b)
 {
-	PyLongObject *z = NULL;
-	Py_ssize_t shiftby, newsize, wordshift, loshift, hishift, i, j;
-	digit lomask, himask;
-
-	CHECK_BINOP(a, b);
-
-	if (Py_SIZE(a) < 0) {
-		/* Right shifting negative numbers is harder */
-		PyLongObject *a1, *a2;
-		a1 = (PyLongObject *) long_invert(a);
-		if (a1 == NULL)
-			goto rshift_error;
-		a2 = (PyLongObject *) long_rshift(a1, b);
-		Py_DECREF(a1);
-		if (a2 == NULL)
-			goto rshift_error;
-		z = (PyLongObject *) long_invert(a2);
-		Py_DECREF(a2);
-	}
-	else {
-		shiftby = PyLong_AsSsize_t((PyObject *)b);
-		if (shiftby == -1L && PyErr_Occurred())
-			goto rshift_error;
-		if (shiftby < 0) {
-			PyErr_SetString(PyExc_ValueError,
-					"negative shift count");
-			goto rshift_error;
-		}
-		wordshift = shiftby / PyLong_SHIFT;
-		newsize = ABS(Py_SIZE(a)) - wordshift;
-		if (newsize <= 0)
-		        return PyLong_FromLong(0);
-		loshift = shiftby % PyLong_SHIFT;
-		hishift = PyLong_SHIFT - loshift;
-		lomask = ((digit)1 << hishift) - 1;
-		himask = PyLong_MASK ^ lomask;
-		z = _PyLong_New(newsize);
-		if (z == NULL)
-			goto rshift_error;
-		if (Py_SIZE(a) < 0)
-			Py_SIZE(z) = -(Py_SIZE(z));
-		for (i = 0, j = wordshift; i < newsize; i++, j++) {
-			z->ob_digit[i] = (a->ob_digit[j] >> loshift) & lomask;
-			if (i+1 < newsize)
-				z->ob_digit[i] |=
-				  (a->ob_digit[j+1] << hishift) & himask;
-		}
-		z = long_normalize(z);
-	}
+    PyLongObject *z = NULL;
+    Py_ssize_t shiftby, newsize, wordshift, loshift, hishift, i, j;
+    digit lomask, himask;
+
+    CHECK_BINOP(a, b);
+
+    if (Py_SIZE(a) < 0) {
+        /* Right shifting negative numbers is harder */
+        PyLongObject *a1, *a2;
+        a1 = (PyLongObject *) long_invert(a);
+        if (a1 == NULL)
+            goto rshift_error;
+        a2 = (PyLongObject *) long_rshift(a1, b);
+        Py_DECREF(a1);
+        if (a2 == NULL)
+            goto rshift_error;
+        z = (PyLongObject *) long_invert(a2);
+        Py_DECREF(a2);
+    }
+    else {
+        shiftby = PyLong_AsSsize_t((PyObject *)b);
+        if (shiftby == -1L && PyErr_Occurred())
+            goto rshift_error;
+        if (shiftby < 0) {
+            PyErr_SetString(PyExc_ValueError,
+                            "negative shift count");
+            goto rshift_error;
+        }
+        wordshift = shiftby / PyLong_SHIFT;
+        newsize = ABS(Py_SIZE(a)) - wordshift;
+        if (newsize <= 0)
+            return PyLong_FromLong(0);
+        loshift = shiftby % PyLong_SHIFT;
+        hishift = PyLong_SHIFT - loshift;
+        lomask = ((digit)1 << hishift) - 1;
+        himask = PyLong_MASK ^ lomask;
+        z = _PyLong_New(newsize);
+        if (z == NULL)
+            goto rshift_error;
+        if (Py_SIZE(a) < 0)
+            Py_SIZE(z) = -(Py_SIZE(z));
+        for (i = 0, j = wordshift; i < newsize; i++, j++) {
+            z->ob_digit[i] = (a->ob_digit[j] >> loshift) & lomask;
+            if (i+1 < newsize)
+                z->ob_digit[i] |=
+                  (a->ob_digit[j+1] << hishift) & himask;
+        }
+        z = long_normalize(z);
+    }
 rshift_error:
-	return (PyObject *) maybe_small_long(z);
+    return (PyObject *) maybe_small_long(z);
 
 }
 
 static PyObject *
 long_lshift(PyObject *v, PyObject *w)
 {
-	/* This version due to Tim Peters */
-	PyLongObject *a = (PyLongObject*)v;
-	PyLongObject *b = (PyLongObject*)w;
-	PyLongObject *z = NULL;
-	Py_ssize_t shiftby, oldsize, newsize, wordshift, remshift, i, j;
-	twodigits accum;
-
-	CHECK_BINOP(a, b);
-
-	shiftby = PyLong_AsSsize_t((PyObject *)b);
-	if (shiftby == -1L && PyErr_Occurred())
-		goto lshift_error;
-	if (shiftby < 0) {
-		PyErr_SetString(PyExc_ValueError, "negative shift count");
-		goto lshift_error;
-	}
-	/* wordshift, remshift = divmod(shiftby, PyLong_SHIFT) */
-	wordshift = shiftby / PyLong_SHIFT;
-	remshift  = shiftby - wordshift * PyLong_SHIFT;
-
-	oldsize = ABS(Py_SIZE(a));
-	newsize = oldsize + wordshift;
-	if (remshift)
-		++newsize;
-	z = _PyLong_New(newsize);
-	if (z == NULL)
-		goto lshift_error;
-	if (Py_SIZE(a) < 0)
-		NEGATE(z);
-	for (i = 0; i < wordshift; i++)
-		z->ob_digit[i] = 0;
-	accum = 0;
-	for (i = wordshift, j = 0; j < oldsize; i++, j++) {
-		accum |= (twodigits)a->ob_digit[j] << remshift;
-		z->ob_digit[i] = (digit)(accum & PyLong_MASK);
-		accum >>= PyLong_SHIFT;
-	}
-	if (remshift)
-		z->ob_digit[newsize-1] = (digit)accum;
-	else
-		assert(!accum);
-	z = long_normalize(z);
+    /* This version due to Tim Peters */
+    PyLongObject *a = (PyLongObject*)v;
+    PyLongObject *b = (PyLongObject*)w;
+    PyLongObject *z = NULL;
+    Py_ssize_t shiftby, oldsize, newsize, wordshift, remshift, i, j;
+    twodigits accum;
+
+    CHECK_BINOP(a, b);
+
+    shiftby = PyLong_AsSsize_t((PyObject *)b);
+    if (shiftby == -1L && PyErr_Occurred())
+        goto lshift_error;
+    if (shiftby < 0) {
+        PyErr_SetString(PyExc_ValueError, "negative shift count");
+        goto lshift_error;
+    }
+    /* wordshift, remshift = divmod(shiftby, PyLong_SHIFT) */
+    wordshift = shiftby / PyLong_SHIFT;
+    remshift  = shiftby - wordshift * PyLong_SHIFT;
+
+    oldsize = ABS(Py_SIZE(a));
+    newsize = oldsize + wordshift;
+    if (remshift)
+        ++newsize;
+    z = _PyLong_New(newsize);
+    if (z == NULL)
+        goto lshift_error;
+    if (Py_SIZE(a) < 0)
+        NEGATE(z);
+    for (i = 0; i < wordshift; i++)
+        z->ob_digit[i] = 0;
+    accum = 0;
+    for (i = wordshift, j = 0; j < oldsize; i++, j++) {
+        accum |= (twodigits)a->ob_digit[j] << remshift;
+        z->ob_digit[i] = (digit)(accum & PyLong_MASK);
+        accum >>= PyLong_SHIFT;
+    }
+    if (remshift)
+        z->ob_digit[newsize-1] = (digit)accum;
+    else
+        assert(!accum);
+    z = long_normalize(z);
 lshift_error:
-	return (PyObject *) maybe_small_long(z);
+    return (PyObject *) maybe_small_long(z);
 }
 
 /* Compute two's complement of digit vector a[0:m], writing result to
@@ -3885,186 +3885,186 @@ lshift_error:
 static void
 v_complement(digit *z, digit *a, Py_ssize_t m)
 {
-	Py_ssize_t i;
-	digit carry = 1;
-	for (i = 0; i < m; ++i) {
-		carry += a[i] ^ PyLong_MASK;
-		z[i] = carry & PyLong_MASK;
-		carry >>= PyLong_SHIFT;
-	}
-	assert(carry == 0);
+    Py_ssize_t i;
+    digit carry = 1;
+    for (i = 0; i < m; ++i) {
+        carry += a[i] ^ PyLong_MASK;
+        z[i] = carry & PyLong_MASK;
+        carry >>= PyLong_SHIFT;
+    }
+    assert(carry == 0);
 }
 
 /* Bitwise and/xor/or operations */
 
 static PyObject *
 long_bitwise(PyLongObject *a,
-	     int op,  /* '&', '|', '^' */
-	     PyLongObject *b)
+             int op,  /* '&', '|', '^' */
+         PyLongObject *b)
 {
-	int nega, negb, negz;
-	Py_ssize_t size_a, size_b, size_z, i;
-	PyLongObject *z;
-
-	/* Bitwise operations for negative numbers operate as though
-	   on a two's complement representation.  So convert arguments
-	   from sign-magnitude to two's complement, and convert the
-	   result back to sign-magnitude at the end. */
-
-	/* If a is negative, replace it by its two's complement. */
-	size_a = ABS(Py_SIZE(a));
-	nega = Py_SIZE(a) < 0;
-	if (nega) {
-		z = _PyLong_New(size_a);
-		if (z == NULL)
-			return NULL;
-		v_complement(z->ob_digit, a->ob_digit, size_a);
-		a = z;
-	}
-	else
-		/* Keep reference count consistent. */
-		Py_INCREF(a);
-
-	/* Same for b. */
-	size_b = ABS(Py_SIZE(b));
-	negb = Py_SIZE(b) < 0;
-	if (negb) {
-		z = _PyLong_New(size_b);
-		if (z == NULL) {
-			Py_DECREF(a);
-			return NULL;
-		}
-		v_complement(z->ob_digit, b->ob_digit, size_b);
-		b = z;
-	}
-	else
-		Py_INCREF(b);
-
-	/* Swap a and b if necessary to ensure size_a >= size_b. */
-	if (size_a < size_b) {
-		z = a; a = b; b = z;
-		size_z = size_a; size_a = size_b; size_b = size_z;
-		negz = nega; nega = negb; negb = negz;
-	}
-
-	/* JRH: The original logic here was to allocate the result value (z)
-	   as the longer of the two operands.  However, there are some cases
-	   where the result is guaranteed to be shorter than that: AND of two
-	   positives, OR of two negatives: use the shorter number.  AND with
-	   mixed signs: use the positive number.  OR with mixed signs: use the
-	   negative number.
-	*/
-	switch (op) {
-	case '^':
-		negz = nega ^ negb;
-		size_z = size_a;
-		break;
-	case '&':
-		negz = nega & negb;
-		size_z = negb ? size_a : size_b;
-		break;
-	case '|':
-		negz = nega | negb;
-		size_z = negb ? size_b : size_a;
-		break;
-	default:
-		PyErr_BadArgument();
-		return NULL;
-	}
-
-	/* We allow an extra digit if z is negative, to make sure that
-	   the final two's complement of z doesn't overflow. */
-	z = _PyLong_New(size_z + negz);
-	if (z == NULL) {
-		Py_DECREF(a);
-		Py_DECREF(b);
-		return NULL;
-	}
-
-	/* Compute digits for overlap of a and b. */
-	switch(op) {
-	case '&':
-		for (i = 0; i < size_b; ++i)
-			z->ob_digit[i] = a->ob_digit[i] & b->ob_digit[i];
-		break;
-	case '|':
-		for (i = 0; i < size_b; ++i)
-			z->ob_digit[i] = a->ob_digit[i] | b->ob_digit[i];
-		break;
-	case '^':
-		for (i = 0; i < size_b; ++i)
-			z->ob_digit[i] = a->ob_digit[i] ^ b->ob_digit[i];
-		break;
-	default:
-		PyErr_BadArgument();
-		return NULL;
-	}
-
-	/* Copy any remaining digits of a, inverting if necessary. */
-	if (op == '^' && negb)
-		for (; i < size_z; ++i)
-			z->ob_digit[i] = a->ob_digit[i] ^ PyLong_MASK;
-	else if (i < size_z)
-		memcpy(&z->ob_digit[i], &a->ob_digit[i],
-		       (size_z-i)*sizeof(digit));
-
-	/* Complement result if negative. */
-	if (negz) {
-		Py_SIZE(z) = -(Py_SIZE(z));
-		z->ob_digit[size_z] = PyLong_MASK;
-		v_complement(z->ob_digit, z->ob_digit, size_z+1);
-	}
-
-	Py_DECREF(a);
-	Py_DECREF(b);
-	return (PyObject *)maybe_small_long(long_normalize(z));
+    int nega, negb, negz;
+    Py_ssize_t size_a, size_b, size_z, i;
+    PyLongObject *z;
+
+    /* Bitwise operations for negative numbers operate as though
+       on a two's complement representation.  So convert arguments
+       from sign-magnitude to two's complement, and convert the
+       result back to sign-magnitude at the end. */
+
+    /* If a is negative, replace it by its two's complement. */
+    size_a = ABS(Py_SIZE(a));
+    nega = Py_SIZE(a) < 0;
+    if (nega) {
+        z = _PyLong_New(size_a);
+        if (z == NULL)
+            return NULL;
+        v_complement(z->ob_digit, a->ob_digit, size_a);
+        a = z;
+    }
+    else
+        /* Keep reference count consistent. */
+        Py_INCREF(a);
+
+    /* Same for b. */
+    size_b = ABS(Py_SIZE(b));
+    negb = Py_SIZE(b) < 0;
+    if (negb) {
+        z = _PyLong_New(size_b);
+        if (z == NULL) {
+            Py_DECREF(a);
+            return NULL;
+        }
+        v_complement(z->ob_digit, b->ob_digit, size_b);
+        b = z;
+    }
+    else
+        Py_INCREF(b);
+
+    /* Swap a and b if necessary to ensure size_a >= size_b. */
+    if (size_a < size_b) {
+        z = a; a = b; b = z;
+        size_z = size_a; size_a = size_b; size_b = size_z;
+        negz = nega; nega = negb; negb = negz;
+    }
+
+    /* JRH: The original logic here was to allocate the result value (z)
+       as the longer of the two operands.  However, there are some cases
+       where the result is guaranteed to be shorter than that: AND of two
+       positives, OR of two negatives: use the shorter number.  AND with
+       mixed signs: use the positive number.  OR with mixed signs: use the
+       negative number.
+    */
+    switch (op) {
+    case '^':
+        negz = nega ^ negb;
+        size_z = size_a;
+        break;
+    case '&':
+        negz = nega & negb;
+        size_z = negb ? size_a : size_b;
+        break;
+    case '|':
+        negz = nega | negb;
+        size_z = negb ? size_b : size_a;
+        break;
+    default:
+        PyErr_BadArgument();
+        return NULL;
+    }
+
+    /* We allow an extra digit if z is negative, to make sure that
+       the final two's complement of z doesn't overflow. */
+    z = _PyLong_New(size_z + negz);
+    if (z == NULL) {
+        Py_DECREF(a);
+        Py_DECREF(b);
+        return NULL;
+    }
+
+    /* Compute digits for overlap of a and b. */
+    switch(op) {
+    case '&':
+        for (i = 0; i < size_b; ++i)
+            z->ob_digit[i] = a->ob_digit[i] & b->ob_digit[i];
+        break;
+    case '|':
+        for (i = 0; i < size_b; ++i)
+            z->ob_digit[i] = a->ob_digit[i] | b->ob_digit[i];
+        break;
+    case '^':
+        for (i = 0; i < size_b; ++i)
+            z->ob_digit[i] = a->ob_digit[i] ^ b->ob_digit[i];
+        break;
+    default:
+        PyErr_BadArgument();
+        return NULL;
+    }
+
+    /* Copy any remaining digits of a, inverting if necessary. */
+    if (op == '^' && negb)
+        for (; i < size_z; ++i)
+            z->ob_digit[i] = a->ob_digit[i] ^ PyLong_MASK;
+    else if (i < size_z)
+        memcpy(&z->ob_digit[i], &a->ob_digit[i],
+               (size_z-i)*sizeof(digit));
+
+    /* Complement result if negative. */
+    if (negz) {
+        Py_SIZE(z) = -(Py_SIZE(z));
+        z->ob_digit[size_z] = PyLong_MASK;
+        v_complement(z->ob_digit, z->ob_digit, size_z+1);
+    }
+
+    Py_DECREF(a);
+    Py_DECREF(b);
+    return (PyObject *)maybe_small_long(long_normalize(z));
 }
 
 static PyObject *
 long_and(PyObject *a, PyObject *b)
 {
-	PyObject *c;
-	CHECK_BINOP(a, b);
-	c = long_bitwise((PyLongObject*)a, '&', (PyLongObject*)b);
-	return c;
+    PyObject *c;
+    CHECK_BINOP(a, b);
+    c = long_bitwise((PyLongObject*)a, '&', (PyLongObject*)b);
+    return c;
 }
 
 static PyObject *
 long_xor(PyObject *a, PyObject *b)
 {
-	PyObject *c;
-	CHECK_BINOP(a, b);
-	c = long_bitwise((PyLongObject*)a, '^', (PyLongObject*)b);
-	return c;
+    PyObject *c;
+    CHECK_BINOP(a, b);
+    c = long_bitwise((PyLongObject*)a, '^', (PyLongObject*)b);
+    return c;
 }
 
 static PyObject *
 long_or(PyObject *a, PyObject *b)
 {
-	PyObject *c;
-	CHECK_BINOP(a, b);
-	c = long_bitwise((PyLongObject*)a, '|', (PyLongObject*)b);
-	return c;
+    PyObject *c;
+    CHECK_BINOP(a, b);
+    c = long_bitwise((PyLongObject*)a, '|', (PyLongObject*)b);
+    return c;
 }
 
 static PyObject *
 long_long(PyObject *v)
 {
-	if (PyLong_CheckExact(v))
-		Py_INCREF(v);
-	else
-		v = _PyLong_Copy((PyLongObject *)v);
-	return v;
+    if (PyLong_CheckExact(v))
+        Py_INCREF(v);
+    else
+        v = _PyLong_Copy((PyLongObject *)v);
+    return v;
 }
 
 static PyObject *
 long_float(PyObject *v)
 {
-	double result;
-	result = PyLong_AsDouble(v);
-	if (result == -1.0 && PyErr_Occurred())
-		return NULL;
-	return PyFloat_FromDouble(result);
+    double result;
+    result = PyLong_AsDouble(v);
+    if (result == -1.0 && PyErr_Occurred())
+        return NULL;
+    return PyFloat_FromDouble(result);
 }
 
 static PyObject *
@@ -4073,47 +4073,47 @@ long_subtype_new(PyTypeObject *type, PyObject *args, PyObject *kwds);
 static PyObject *
 long_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 {
-	PyObject *x = NULL;
-	int base = -909;		     /* unlikely! */
-	static char *kwlist[] = {"x", "base", 0};
-
-	if (type != &PyLong_Type)
-		return long_subtype_new(type, args, kwds); /* Wimp out */
-	if (!PyArg_ParseTupleAndKeywords(args, kwds, "|Oi:int", kwlist,
-					 &x, &base))
-		return NULL;
-	if (x == NULL)
-		return PyLong_FromLong(0L);
-	if (base == -909)
-		return PyNumber_Long(x);
-	else if (PyUnicode_Check(x))
-		return PyLong_FromUnicode(PyUnicode_AS_UNICODE(x),
-					  PyUnicode_GET_SIZE(x),
-					  base);
-	else if (PyByteArray_Check(x) || PyBytes_Check(x)) {
-		/* Since PyLong_FromString doesn't have a length parameter,
-		 * check here for possible NULs in the string. */
-		char *string;
-		Py_ssize_t size = Py_SIZE(x);
-		if (PyByteArray_Check(x))
-			string = PyByteArray_AS_STRING(x);
-		else
-			string = PyBytes_AS_STRING(x);
-		if (strlen(string) != (size_t)size) {
-			/* We only see this if there's a null byte in x,
-			   x is a bytes or buffer, *and* a base is given. */
-			PyErr_Format(PyExc_ValueError,
-			    "invalid literal for int() with base %d: %R",
-			    base, x);
-			return NULL;
-		}
-		return PyLong_FromString(string, NULL, base);
-	}
-	else {
-		PyErr_SetString(PyExc_TypeError,
-			"int() can't convert non-string with explicit base");
-		return NULL;
-	}
+    PyObject *x = NULL;
+    int base = -909;                         /* unlikely! */
+    static char *kwlist[] = {"x", "base", 0};
+
+    if (type != &PyLong_Type)
+        return long_subtype_new(type, args, kwds); /* Wimp out */
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "|Oi:int", kwlist,
+                                     &x, &base))
+        return NULL;
+    if (x == NULL)
+        return PyLong_FromLong(0L);
+    if (base == -909)
+        return PyNumber_Long(x);
+    else if (PyUnicode_Check(x))
+        return PyLong_FromUnicode(PyUnicode_AS_UNICODE(x),
+                                  PyUnicode_GET_SIZE(x),
+                                  base);
+    else if (PyByteArray_Check(x) || PyBytes_Check(x)) {
+        /* Since PyLong_FromString doesn't have a length parameter,
+         * check here for possible NULs in the string. */
+        char *string;
+        Py_ssize_t size = Py_SIZE(x);
+        if (PyByteArray_Check(x))
+            string = PyByteArray_AS_STRING(x);
+        else
+            string = PyBytes_AS_STRING(x);
+        if (strlen(string) != (size_t)size) {
+            /* We only see this if there's a null byte in x,
+               x is a bytes or buffer, *and* a base is given. */
+            PyErr_Format(PyExc_ValueError,
+                "invalid literal for int() with base %d: %R",
+                base, x);
+            return NULL;
+        }
+        return PyLong_FromString(string, NULL, base);
+    }
+    else {
+        PyErr_SetString(PyExc_TypeError,
+            "int() can't convert non-string with explicit base");
+        return NULL;
+    }
 }
 
 /* Wimpy, slow approach to tp_new calls for subtypes of long:
@@ -4124,256 +4124,256 @@ long_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 static PyObject *
 long_subtype_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 {
-	PyLongObject *tmp, *newobj;
-	Py_ssize_t i, n;
-
-	assert(PyType_IsSubtype(type, &PyLong_Type));
-	tmp = (PyLongObject *)long_new(&PyLong_Type, args, kwds);
-	if (tmp == NULL)
-		return NULL;
-	assert(PyLong_CheckExact(tmp));
-	n = Py_SIZE(tmp);
-	if (n < 0)
-		n = -n;
-	newobj = (PyLongObject *)type->tp_alloc(type, n);
-	if (newobj == NULL) {
-		Py_DECREF(tmp);
-		return NULL;
-	}
-	assert(PyLong_Check(newobj));
-	Py_SIZE(newobj) = Py_SIZE(tmp);
-	for (i = 0; i < n; i++)
-		newobj->ob_digit[i] = tmp->ob_digit[i];
-	Py_DECREF(tmp);
-	return (PyObject *)newobj;
+    PyLongObject *tmp, *newobj;
+    Py_ssize_t i, n;
+
+    assert(PyType_IsSubtype(type, &PyLong_Type));
+    tmp = (PyLongObject *)long_new(&PyLong_Type, args, kwds);
+    if (tmp == NULL)
+        return NULL;
+    assert(PyLong_CheckExact(tmp));
+    n = Py_SIZE(tmp);
+    if (n < 0)
+        n = -n;
+    newobj = (PyLongObject *)type->tp_alloc(type, n);
+    if (newobj == NULL) {
+        Py_DECREF(tmp);
+        return NULL;
+    }
+    assert(PyLong_Check(newobj));
+    Py_SIZE(newobj) = Py_SIZE(tmp);
+    for (i = 0; i < n; i++)
+        newobj->ob_digit[i] = tmp->ob_digit[i];
+    Py_DECREF(tmp);
+    return (PyObject *)newobj;
 }
 
 static PyObject *
 long_getnewargs(PyLongObject *v)
 {
-	return Py_BuildValue("(N)", _PyLong_Copy(v));
+    return Py_BuildValue("(N)", _PyLong_Copy(v));
 }
 
 static PyObject *
 long_get0(PyLongObject *v, void *context) {
-	return PyLong_FromLong(0L);
+    return PyLong_FromLong(0L);
 }
 
 static PyObject *
 long_get1(PyLongObject *v, void *context) {
-	return PyLong_FromLong(1L);
+    return PyLong_FromLong(1L);
 }
 
 static PyObject *
 long__format__(PyObject *self, PyObject *args)
 {
-	PyObject *format_spec;
+    PyObject *format_spec;
 
-	if (!PyArg_ParseTuple(args, "U:__format__", &format_spec))
-		return NULL;
-	return _PyLong_FormatAdvanced(self,
-				      PyUnicode_AS_UNICODE(format_spec),
-				      PyUnicode_GET_SIZE(format_spec));
+    if (!PyArg_ParseTuple(args, "U:__format__", &format_spec))
+        return NULL;
+    return _PyLong_FormatAdvanced(self,
+                                  PyUnicode_AS_UNICODE(format_spec),
+                                  PyUnicode_GET_SIZE(format_spec));
 }
 
 static PyObject *
 long_round(PyObject *self, PyObject *args)
 {
-	PyObject *o_ndigits=NULL, *temp;
-	PyLongObject *pow=NULL, *q=NULL, *r=NULL, *ndigits=NULL, *one;
-	int errcode;
-	digit q_mod_4;
-
-	/* Notes on the algorithm: to round to the nearest 10**n (n positive),
-	   the straightforward method is:
-
-	      (1) divide by 10**n
-	      (2) round to nearest integer (round to even in case of tie)
-	      (3) multiply result by 10**n.
-
-	   But the rounding step involves examining the fractional part of the
-	   quotient to see whether it's greater than 0.5 or not.  Since we
-	   want to do the whole calculation in integer arithmetic, it's
-	   simpler to do:
-
-	      (1) divide by (10**n)/2
-	      (2) round to nearest multiple of 2 (multiple of 4 in case of tie)
-	      (3) multiply result by (10**n)/2.
-
-	   Then all we need to know about the fractional part of the quotient
-	   arising in step (2) is whether it's zero or not.
-
-	   Doing both a multiplication and division is wasteful, and is easily
-	   avoided if we just figure out how much to adjust the original input
-	   by to do the rounding.
-
-	   Here's the whole algorithm expressed in Python.
-
-	    def round(self, ndigits = None):
-	        """round(int, int) -> int"""
-	        if ndigits is None or ndigits >= 0:
-	            return self
-	        pow = 10**-ndigits >> 1
-	        q, r = divmod(self, pow)
-	        self -= r
-	        if (q & 1 != 0):
-	            if (q & 2 == r == 0):
-	                self -= pow
-	            else:
-	                self += pow
-	        return self
-
-	*/
-	if (!PyArg_ParseTuple(args, "|O", &o_ndigits))
-		return NULL;
-	if (o_ndigits == NULL)
-		return long_long(self);
-
-	ndigits = (PyLongObject *)PyNumber_Index(o_ndigits);
-	if (ndigits == NULL)
-		return NULL;
-
-	if (Py_SIZE(ndigits) >= 0) {
-		Py_DECREF(ndigits);
-		return long_long(self);
-	}
-
-	Py_INCREF(self); /* to keep refcounting simple */
-	/* we now own references to self, ndigits */
-
-	/* pow = 10 ** -ndigits >> 1 */
-	pow = (PyLongObject *)PyLong_FromLong(10L);
-	if (pow == NULL)
-		goto error;
-	temp = long_neg(ndigits);
-	Py_DECREF(ndigits);
-	ndigits = (PyLongObject *)temp;
-	if (ndigits == NULL)
-		goto error;
-	temp = long_pow((PyObject *)pow, (PyObject *)ndigits, Py_None);
-	Py_DECREF(pow);
-	pow = (PyLongObject *)temp;
-	if (pow == NULL)
-		goto error;
-	assert(PyLong_Check(pow)); /* check long_pow returned a long */
-	one = (PyLongObject *)PyLong_FromLong(1L);
-	if (one == NULL)
-		goto error;
-	temp = long_rshift(pow, one);
-	Py_DECREF(one);
-	Py_DECREF(pow);
-	pow = (PyLongObject *)temp;
-	if (pow == NULL)
-		goto error;
-
-	/* q, r = divmod(self, pow) */
-	errcode = l_divmod((PyLongObject *)self, pow, &q, &r);
-	if (errcode == -1)
-		goto error;
-
-	/* self -= r */
-	temp = long_sub((PyLongObject *)self, r);
-	Py_DECREF(self);
-	self = temp;
-	if (self == NULL)
-		goto error;
-
-	/* get value of quotient modulo 4 */
-	if (Py_SIZE(q) == 0)
-		q_mod_4 = 0;
-	else if (Py_SIZE(q) > 0)
-		q_mod_4 = q->ob_digit[0] & 3;
-	else
-		q_mod_4 = (PyLong_BASE-q->ob_digit[0]) & 3;
-
-	if ((q_mod_4 & 1) == 1) {
-		/* q is odd; round self up or down by adding or subtracting pow */
-		if (q_mod_4 == 1 && Py_SIZE(r) == 0)
-			temp = (PyObject *)long_sub((PyLongObject *)self, pow);
-		else
-			temp = (PyObject *)long_add((PyLongObject *)self, pow);
-		Py_DECREF(self);
-		self = temp;
-		if (self == NULL)
-			goto error;
-	}
-	Py_DECREF(q);
-	Py_DECREF(r);
-	Py_DECREF(pow);
-	Py_DECREF(ndigits);
-	return self;
+    PyObject *o_ndigits=NULL, *temp;
+    PyLongObject *pow=NULL, *q=NULL, *r=NULL, *ndigits=NULL, *one;
+    int errcode;
+    digit q_mod_4;
+
+    /* Notes on the algorithm: to round to the nearest 10**n (n positive),
+       the straightforward method is:
+
+          (1) divide by 10**n
+          (2) round to nearest integer (round to even in case of tie)
+          (3) multiply result by 10**n.
+
+       But the rounding step involves examining the fractional part of the
+       quotient to see whether it's greater than 0.5 or not.  Since we
+       want to do the whole calculation in integer arithmetic, it's
+       simpler to do:
+
+          (1) divide by (10**n)/2
+          (2) round to nearest multiple of 2 (multiple of 4 in case of tie)
+          (3) multiply result by (10**n)/2.
+
+       Then all we need to know about the fractional part of the quotient
+       arising in step (2) is whether it's zero or not.
+
+       Doing both a multiplication and division is wasteful, and is easily
+       avoided if we just figure out how much to adjust the original input
+       by to do the rounding.
+
+       Here's the whole algorithm expressed in Python.
+
+        def round(self, ndigits = None):
+        """round(int, int) -> int"""
+        if ndigits is None or ndigits >= 0:
+            return self
+        pow = 10**-ndigits >> 1
+        q, r = divmod(self, pow)
+        self -= r
+        if (q & 1 != 0):
+            if (q & 2 == r == 0):
+            self -= pow
+            else:
+            self += pow
+        return self
+
+    */
+    if (!PyArg_ParseTuple(args, "|O", &o_ndigits))
+        return NULL;
+    if (o_ndigits == NULL)
+        return long_long(self);
+
+    ndigits = (PyLongObject *)PyNumber_Index(o_ndigits);
+    if (ndigits == NULL)
+        return NULL;
+
+    if (Py_SIZE(ndigits) >= 0) {
+        Py_DECREF(ndigits);
+        return long_long(self);
+    }
+
+    Py_INCREF(self); /* to keep refcounting simple */
+    /* we now own references to self, ndigits */
+
+    /* pow = 10 ** -ndigits >> 1 */
+    pow = (PyLongObject *)PyLong_FromLong(10L);
+    if (pow == NULL)
+        goto error;
+    temp = long_neg(ndigits);
+    Py_DECREF(ndigits);
+    ndigits = (PyLongObject *)temp;
+    if (ndigits == NULL)
+        goto error;
+    temp = long_pow((PyObject *)pow, (PyObject *)ndigits, Py_None);
+    Py_DECREF(pow);
+    pow = (PyLongObject *)temp;
+    if (pow == NULL)
+        goto error;
+    assert(PyLong_Check(pow)); /* check long_pow returned a long */
+    one = (PyLongObject *)PyLong_FromLong(1L);
+    if (one == NULL)
+        goto error;
+    temp = long_rshift(pow, one);
+    Py_DECREF(one);
+    Py_DECREF(pow);
+    pow = (PyLongObject *)temp;
+    if (pow == NULL)
+        goto error;
+
+    /* q, r = divmod(self, pow) */
+    errcode = l_divmod((PyLongObject *)self, pow, &q, &r);
+    if (errcode == -1)
+        goto error;
+
+    /* self -= r */
+    temp = long_sub((PyLongObject *)self, r);
+    Py_DECREF(self);
+    self = temp;
+    if (self == NULL)
+        goto error;
+
+    /* get value of quotient modulo 4 */
+    if (Py_SIZE(q) == 0)
+        q_mod_4 = 0;
+    else if (Py_SIZE(q) > 0)
+        q_mod_4 = q->ob_digit[0] & 3;
+    else
+        q_mod_4 = (PyLong_BASE-q->ob_digit[0]) & 3;
+
+    if ((q_mod_4 & 1) == 1) {
+        /* q is odd; round self up or down by adding or subtracting pow */
+        if (q_mod_4 == 1 && Py_SIZE(r) == 0)
+            temp = (PyObject *)long_sub((PyLongObject *)self, pow);
+        else
+            temp = (PyObject *)long_add((PyLongObject *)self, pow);
+        Py_DECREF(self);
+        self = temp;
+        if (self == NULL)
+            goto error;
+    }
+    Py_DECREF(q);
+    Py_DECREF(r);
+    Py_DECREF(pow);
+    Py_DECREF(ndigits);
+    return self;
 
   error:
-	Py_XDECREF(q);
-	Py_XDECREF(r);
-	Py_XDECREF(pow);
-	Py_XDECREF(self);
-	Py_XDECREF(ndigits);
-	return NULL;
+    Py_XDECREF(q);
+    Py_XDECREF(r);
+    Py_XDECREF(pow);
+    Py_XDECREF(self);
+    Py_XDECREF(ndigits);
+    return NULL;
 }
 
 static PyObject *
 long_sizeof(PyLongObject *v)
 {
-	Py_ssize_t res;
+    Py_ssize_t res;
 
-	res = offsetof(PyLongObject, ob_digit) + ABS(Py_SIZE(v))*sizeof(digit);
-	return PyLong_FromSsize_t(res);
+    res = offsetof(PyLongObject, ob_digit) + ABS(Py_SIZE(v))*sizeof(digit);
+    return PyLong_FromSsize_t(res);
 }
 
 static PyObject *
 long_bit_length(PyLongObject *v)
 {
-	PyLongObject *result, *x, *y;
-	Py_ssize_t ndigits, msd_bits = 0;
-	digit msd;
-
-	assert(v != NULL);
-	assert(PyLong_Check(v));
-
-	ndigits = ABS(Py_SIZE(v));
-	if (ndigits == 0)
-		return PyLong_FromLong(0);
-
-	msd = v->ob_digit[ndigits-1];
-	while (msd >= 32) {
-		msd_bits += 6;
-		msd >>= 6;
-	}
-	msd_bits += (long)(BitLengthTable[msd]);
-
-	if (ndigits <= PY_SSIZE_T_MAX/PyLong_SHIFT)
-		return PyLong_FromSsize_t((ndigits-1)*PyLong_SHIFT + msd_bits);
-
-	/* expression above may overflow; use Python integers instead */
-	result = (PyLongObject *)PyLong_FromSsize_t(ndigits - 1);
-	if (result == NULL)
-		return NULL;
-	x = (PyLongObject *)PyLong_FromLong(PyLong_SHIFT);
-	if (x == NULL)
-		goto error;
-	y = (PyLongObject *)long_mul(result, x);
-	Py_DECREF(x);
-	if (y == NULL)
-		goto error;
-	Py_DECREF(result);
-	result = y;
-
-	x = (PyLongObject *)PyLong_FromLong((long)msd_bits);
-	if (x == NULL)
-		goto error;
-	y = (PyLongObject *)long_add(result, x);
-	Py_DECREF(x);
-	if (y == NULL)
-		goto error;
-	Py_DECREF(result);
-	result = y;
-
-	return (PyObject *)result;
+    PyLongObject *result, *x, *y;
+    Py_ssize_t ndigits, msd_bits = 0;
+    digit msd;
+
+    assert(v != NULL);
+    assert(PyLong_Check(v));
+
+    ndigits = ABS(Py_SIZE(v));
+    if (ndigits == 0)
+        return PyLong_FromLong(0);
+
+    msd = v->ob_digit[ndigits-1];
+    while (msd >= 32) {
+        msd_bits += 6;
+        msd >>= 6;
+    }
+    msd_bits += (long)(BitLengthTable[msd]);
+
+    if (ndigits <= PY_SSIZE_T_MAX/PyLong_SHIFT)
+        return PyLong_FromSsize_t((ndigits-1)*PyLong_SHIFT + msd_bits);
+
+    /* expression above may overflow; use Python integers instead */
+    result = (PyLongObject *)PyLong_FromSsize_t(ndigits - 1);
+    if (result == NULL)
+        return NULL;
+    x = (PyLongObject *)PyLong_FromLong(PyLong_SHIFT);
+    if (x == NULL)
+        goto error;
+    y = (PyLongObject *)long_mul(result, x);
+    Py_DECREF(x);
+    if (y == NULL)
+        goto error;
+    Py_DECREF(result);
+    result = y;
+
+    x = (PyLongObject *)PyLong_FromLong((long)msd_bits);
+    if (x == NULL)
+        goto error;
+    y = (PyLongObject *)long_add(result, x);
+    Py_DECREF(x);
+    if (y == NULL)
+        goto error;
+    Py_DECREF(result);
+    result = y;
+
+    return (PyObject *)result;
 
 error:
-	Py_DECREF(result);
-	return NULL;
+    Py_DECREF(result);
+    return NULL;
 }
 
 PyDoc_STRVAR(long_bit_length_doc,
@@ -4389,7 +4389,7 @@ Number of bits necessary to represent self in binary.\n\
 static PyObject *
 long_is_finite(PyObject *v)
 {
-	Py_RETURN_TRUE;
+    Py_RETURN_TRUE;
 }
 #endif
 
@@ -4397,64 +4397,64 @@ long_is_finite(PyObject *v)
 static PyObject *
 long_to_bytes(PyLongObject *v, PyObject *args, PyObject *kwds)
 {
-	PyObject *byteorder_str;
-	PyObject *is_signed_obj = NULL;
-	Py_ssize_t length;
-	int little_endian;
-	int is_signed;
-	PyObject *bytes;
-	static char *kwlist[] = {"length", "byteorder", "signed", NULL};
-
-	if (!PyArg_ParseTupleAndKeywords(args, kwds, "nU|O:to_bytes", kwlist,
-					 &length, &byteorder_str,
-					 &is_signed_obj))
-		return NULL;
-
-	if (args != NULL && Py_SIZE(args) > 2) {
-		PyErr_SetString(PyExc_TypeError,
-			"'signed' is a keyword-only argument");
-		return NULL;
-	}
-
-	if (!PyUnicode_CompareWithASCIIString(byteorder_str, "little"))
-		little_endian = 1;
-	else if (!PyUnicode_CompareWithASCIIString(byteorder_str, "big"))
-		little_endian = 0;
-	else {
-		PyErr_SetString(PyExc_ValueError,
-			"byteorder must be either 'little' or 'big'");
-		return NULL;
-	}
-
-	if (is_signed_obj != NULL) {
-		int cmp = PyObject_IsTrue(is_signed_obj);
-		if (cmp < 0)
-			return NULL;
-		is_signed = cmp ? 1 : 0;
-	}
-	else {
-		/* If the signed argument was omitted, use False as the
-		   default. */
-		is_signed = 0;
-	}
-
-	if (length < 0) {
-		PyErr_SetString(PyExc_ValueError, 
-				"length argument must be non-negative");
-		return NULL;
-	}
-
-	bytes = PyBytes_FromStringAndSize(NULL, length);
-	if (bytes == NULL)
-		return NULL;
-
-	if (_PyLong_AsByteArray(v, (unsigned char *)PyBytes_AS_STRING(bytes),
-				length, little_endian, is_signed) < 0) {
-		Py_DECREF(bytes);
-		return NULL;
-	}
-
-	return bytes;
+    PyObject *byteorder_str;
+    PyObject *is_signed_obj = NULL;
+    Py_ssize_t length;
+    int little_endian;
+    int is_signed;
+    PyObject *bytes;
+    static char *kwlist[] = {"length", "byteorder", "signed", NULL};
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "nU|O:to_bytes", kwlist,
+                                     &length, &byteorder_str,
+                                     &is_signed_obj))
+        return NULL;
+
+    if (args != NULL && Py_SIZE(args) > 2) {
+        PyErr_SetString(PyExc_TypeError,
+            "'signed' is a keyword-only argument");
+        return NULL;
+    }
+
+    if (!PyUnicode_CompareWithASCIIString(byteorder_str, "little"))
+        little_endian = 1;
+    else if (!PyUnicode_CompareWithASCIIString(byteorder_str, "big"))
+        little_endian = 0;
+    else {
+        PyErr_SetString(PyExc_ValueError,
+            "byteorder must be either 'little' or 'big'");
+        return NULL;
+    }
+
+    if (is_signed_obj != NULL) {
+        int cmp = PyObject_IsTrue(is_signed_obj);
+        if (cmp < 0)
+            return NULL;
+        is_signed = cmp ? 1 : 0;
+    }
+    else {
+        /* If the signed argument was omitted, use False as the
+           default. */
+        is_signed = 0;
+    }
+
+    if (length < 0) {
+        PyErr_SetString(PyExc_ValueError,
+                        "length argument must be non-negative");
+        return NULL;
+    }
+
+    bytes = PyBytes_FromStringAndSize(NULL, length);
+    if (bytes == NULL)
+        return NULL;
+
+    if (_PyLong_AsByteArray(v, (unsigned char *)PyBytes_AS_STRING(bytes),
+                            length, little_endian, is_signed) < 0) {
+        Py_DECREF(bytes);
+        return NULL;
+    }
+
+    return bytes;
 }
 
 PyDoc_STRVAR(long_to_bytes_doc,
@@ -4462,7 +4462,7 @@ PyDoc_STRVAR(long_to_bytes_doc,
 \n\
 Return an array of bytes representing an integer.\n\
 \n\
-The integer is represented using length bytes.	An OverflowError is\n\
+The integer is represented using length bytes.  An OverflowError is\n\
 raised if the integer is not representable with the given number of\n\
 bytes.\n\
 \n\
@@ -4473,87 +4473,87 @@ significant byte is at the end of the byte array.  To request the native\n\
 byte order of the host system, use `sys.byteorder' as the byte order value.\n\
 \n\
 The signed keyword-only argument determines whether two's complement is\n\
-used to represent the integer.	If signed is False and a negative integer\n\
+used to represent the integer.  If signed is False and a negative integer\n\
 is given, an OverflowError is raised.");
 
 static PyObject *
 long_from_bytes(PyTypeObject *type, PyObject *args, PyObject *kwds)
 {
-	PyObject *byteorder_str;
-	PyObject *is_signed_obj = NULL;
-	int little_endian;
-	int is_signed;
-	PyObject *obj;
-	PyObject *bytes;
-	PyObject *long_obj;
-	static char *kwlist[] = {"bytes", "byteorder", "signed", NULL};
-
-	if (!PyArg_ParseTupleAndKeywords(args, kwds, "OU|O:from_bytes", kwlist,
-					 &obj, &byteorder_str,
-					 &is_signed_obj))
-		return NULL;
-
-	if (args != NULL && Py_SIZE(args) > 2) {
-		PyErr_SetString(PyExc_TypeError,
-			"'signed' is a keyword-only argument");
-		return NULL;
-	}
-
-	if (!PyUnicode_CompareWithASCIIString(byteorder_str, "little"))
-		little_endian = 1;
-	else if (!PyUnicode_CompareWithASCIIString(byteorder_str, "big"))
-		little_endian = 0;
-	else {
-		PyErr_SetString(PyExc_ValueError,
-			"byteorder must be either 'little' or 'big'");
-		return NULL;
-	}
-
-	if (is_signed_obj != NULL) {
-		int cmp = PyObject_IsTrue(is_signed_obj);
-		if (cmp < 0)
-			return NULL;
-		is_signed = cmp ? 1 : 0;
-	}
-	else {
-		/* If the signed argument was omitted, use False as the
-		   default. */
-		is_signed = 0;
-	}
-
-	bytes = PyObject_Bytes(obj);
-	if (bytes == NULL)
-		return NULL;
-
-	long_obj = _PyLong_FromByteArray(
-		(unsigned char *)PyBytes_AS_STRING(bytes), Py_SIZE(bytes),
-		little_endian, is_signed);
-	Py_DECREF(bytes);
-
-	/* If from_bytes() was used on subclass, allocate new subclass
-	 * instance, initialize it with decoded long value and return it.
-	 */
-	if (type != &PyLong_Type && PyType_IsSubtype(type, &PyLong_Type)) {
-		PyLongObject *newobj;
-		int i;
-		Py_ssize_t n = ABS(Py_SIZE(long_obj));
-
-		newobj = (PyLongObject *)type->tp_alloc(type, n);
-		if (newobj == NULL) {
-			Py_DECREF(long_obj);
-			return NULL;
-		}
-		assert(PyLong_Check(newobj));
-		Py_SIZE(newobj) = Py_SIZE(long_obj);
-		for (i = 0; i < n; i++) {
-			newobj->ob_digit[i] = 
-				((PyLongObject *)long_obj)->ob_digit[i];
-		}
-		Py_DECREF(long_obj);
-		return (PyObject *)newobj;
-	}
-
-	return long_obj;
+    PyObject *byteorder_str;
+    PyObject *is_signed_obj = NULL;
+    int little_endian;
+    int is_signed;
+    PyObject *obj;
+    PyObject *bytes;
+    PyObject *long_obj;
+    static char *kwlist[] = {"bytes", "byteorder", "signed", NULL};
+
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "OU|O:from_bytes", kwlist,
+                                     &obj, &byteorder_str,
+                                     &is_signed_obj))
+        return NULL;
+
+    if (args != NULL && Py_SIZE(args) > 2) {
+        PyErr_SetString(PyExc_TypeError,
+            "'signed' is a keyword-only argument");
+        return NULL;
+    }
+
+    if (!PyUnicode_CompareWithASCIIString(byteorder_str, "little"))
+        little_endian = 1;
+    else if (!PyUnicode_CompareWithASCIIString(byteorder_str, "big"))
+        little_endian = 0;
+    else {
+        PyErr_SetString(PyExc_ValueError,
+            "byteorder must be either 'little' or 'big'");
+        return NULL;
+    }
+
+    if (is_signed_obj != NULL) {
+        int cmp = PyObject_IsTrue(is_signed_obj);
+        if (cmp < 0)
+            return NULL;
+        is_signed = cmp ? 1 : 0;
+    }
+    else {
+        /* If the signed argument was omitted, use False as the
+           default. */
+        is_signed = 0;
+    }
+
+    bytes = PyObject_Bytes(obj);
+    if (bytes == NULL)
+        return NULL;
+
+    long_obj = _PyLong_FromByteArray(
+        (unsigned char *)PyBytes_AS_STRING(bytes), Py_SIZE(bytes),
+        little_endian, is_signed);
+    Py_DECREF(bytes);
+
+    /* If from_bytes() was used on subclass, allocate new subclass
+     * instance, initialize it with decoded long value and return it.
+     */
+    if (type != &PyLong_Type && PyType_IsSubtype(type, &PyLong_Type)) {
+        PyLongObject *newobj;
+        int i;
+        Py_ssize_t n = ABS(Py_SIZE(long_obj));
+
+        newobj = (PyLongObject *)type->tp_alloc(type, n);
+        if (newobj == NULL) {
+            Py_DECREF(long_obj);
+            return NULL;
+        }
+        assert(PyLong_Check(newobj));
+        Py_SIZE(newobj) = Py_SIZE(long_obj);
+        for (i = 0; i < n; i++) {
+            newobj->ob_digit[i] =
+                ((PyLongObject *)long_obj)->ob_digit[i];
+        }
+        Py_DECREF(long_obj);
+        return (PyObject *)newobj;
+    }
+
+    return long_obj;
 }
 
 PyDoc_STRVAR(long_from_bytes_doc,
@@ -4575,32 +4575,32 @@ The signed keyword-only argument indicates whether two's complement is\n\
 used to represent the integer.");
 
 static PyMethodDef long_methods[] = {
-	{"conjugate",	(PyCFunction)long_long,	METH_NOARGS,
-	 "Returns self, the complex conjugate of any int."},
-	{"bit_length",	(PyCFunction)long_bit_length, METH_NOARGS,
-	 long_bit_length_doc},
+    {"conjugate",       (PyCFunction)long_long, METH_NOARGS,
+     "Returns self, the complex conjugate of any int."},
+    {"bit_length",      (PyCFunction)long_bit_length, METH_NOARGS,
+     long_bit_length_doc},
 #if 0
-	{"is_finite",	(PyCFunction)long_is_finite,	METH_NOARGS,
-	 "Returns always True."},
+    {"is_finite",       (PyCFunction)long_is_finite,    METH_NOARGS,
+     "Returns always True."},
 #endif
-	{"to_bytes",	(PyCFunction)long_to_bytes,
-	 METH_VARARGS|METH_KEYWORDS, long_to_bytes_doc},
-	{"from_bytes",	(PyCFunction)long_from_bytes,
-	 METH_VARARGS|METH_KEYWORDS|METH_CLASS, long_from_bytes_doc},
-	{"__trunc__",	(PyCFunction)long_long,	METH_NOARGS,
-         "Truncating an Integral returns itself."},
-	{"__floor__",	(PyCFunction)long_long,	METH_NOARGS,
-         "Flooring an Integral returns itself."},
-	{"__ceil__",	(PyCFunction)long_long,	METH_NOARGS,
-         "Ceiling of an Integral returns itself."},
-	{"__round__",	(PyCFunction)long_round, METH_VARARGS,
-	 "Rounding an Integral returns itself.\n"
-	 "Rounding with an ndigits argument also returns an integer."},
-	{"__getnewargs__",	(PyCFunction)long_getnewargs,	METH_NOARGS},
-        {"__format__", (PyCFunction)long__format__, METH_VARARGS},
-	{"__sizeof__",	(PyCFunction)long_sizeof, METH_NOARGS,
-	 "Returns size in memory, in bytes"},
-	{NULL,		NULL}		/* sentinel */
+    {"to_bytes",        (PyCFunction)long_to_bytes,
+     METH_VARARGS|METH_KEYWORDS, long_to_bytes_doc},
+    {"from_bytes",      (PyCFunction)long_from_bytes,
+     METH_VARARGS|METH_KEYWORDS|METH_CLASS, long_from_bytes_doc},
+    {"__trunc__",       (PyCFunction)long_long, METH_NOARGS,
+     "Truncating an Integral returns itself."},
+    {"__floor__",       (PyCFunction)long_long, METH_NOARGS,
+     "Flooring an Integral returns itself."},
+    {"__ceil__",        (PyCFunction)long_long, METH_NOARGS,
+     "Ceiling of an Integral returns itself."},
+    {"__round__",       (PyCFunction)long_round, METH_VARARGS,
+     "Rounding an Integral returns itself.\n"
+     "Rounding with an ndigits argument also returns an integer."},
+    {"__getnewargs__",          (PyCFunction)long_getnewargs,   METH_NOARGS},
+    {"__format__", (PyCFunction)long__format__, METH_VARARGS},
+    {"__sizeof__",      (PyCFunction)long_sizeof, METH_NOARGS,
+     "Returns size in memory, in bytes"},
+    {NULL,              NULL}           /* sentinel */
 };
 
 static PyGetSetDef long_getset[] = {
@@ -4633,83 +4633,83 @@ string, use the optional base.  It is an error to supply a base when\n\
 converting a non-string.");
 
 static PyNumberMethods long_as_number = {
-	(binaryfunc)	long_add,	/*nb_add*/
-	(binaryfunc)	long_sub,	/*nb_subtract*/
-	(binaryfunc)	long_mul,	/*nb_multiply*/
-			long_mod,	/*nb_remainder*/
-			long_divmod,	/*nb_divmod*/
-			long_pow,	/*nb_power*/
-	(unaryfunc) 	long_neg,	/*nb_negative*/
-	(unaryfunc) 	long_long,	/*tp_positive*/
-	(unaryfunc) 	long_abs,	/*tp_absolute*/
-	(inquiry)	long_bool,	/*tp_bool*/
-	(unaryfunc)	long_invert,	/*nb_invert*/
-			long_lshift,	/*nb_lshift*/
-	(binaryfunc)	long_rshift,	/*nb_rshift*/
-			long_and,	/*nb_and*/
-			long_xor,	/*nb_xor*/
-			long_or,	/*nb_or*/
-			long_long,	/*nb_int*/
-	0,				/*nb_reserved*/
-			long_float,	/*nb_float*/
-	0,				/* nb_inplace_add */
-	0,				/* nb_inplace_subtract */
-	0,				/* nb_inplace_multiply */
-	0,				/* nb_inplace_remainder */
-	0,				/* nb_inplace_power */
-	0,				/* nb_inplace_lshift */
-	0,				/* nb_inplace_rshift */
-	0,				/* nb_inplace_and */
-	0,				/* nb_inplace_xor */
-	0,				/* nb_inplace_or */
-	long_div,			/* nb_floor_divide */
-	long_true_divide,		/* nb_true_divide */
-	0,				/* nb_inplace_floor_divide */
-	0,				/* nb_inplace_true_divide */
-	long_long,			/* nb_index */
+    (binaryfunc)        long_add,       /*nb_add*/
+    (binaryfunc)        long_sub,       /*nb_subtract*/
+    (binaryfunc)        long_mul,       /*nb_multiply*/
+            long_mod,                   /*nb_remainder*/
+            long_divmod,                /*nb_divmod*/
+            long_pow,                   /*nb_power*/
+    (unaryfunc)         long_neg,       /*nb_negative*/
+    (unaryfunc)         long_long,      /*tp_positive*/
+    (unaryfunc)         long_abs,       /*tp_absolute*/
+    (inquiry)           long_bool,      /*tp_bool*/
+    (unaryfunc)         long_invert,    /*nb_invert*/
+            long_lshift,                /*nb_lshift*/
+    (binaryfunc)        long_rshift,    /*nb_rshift*/
+            long_and,                   /*nb_and*/
+            long_xor,                   /*nb_xor*/
+            long_or,                    /*nb_or*/
+            long_long,                  /*nb_int*/
+    0,                                  /*nb_reserved*/
+            long_float,                 /*nb_float*/
+    0,                                  /* nb_inplace_add */
+    0,                                  /* nb_inplace_subtract */
+    0,                                  /* nb_inplace_multiply */
+    0,                                  /* nb_inplace_remainder */
+    0,                                  /* nb_inplace_power */
+    0,                                  /* nb_inplace_lshift */
+    0,                                  /* nb_inplace_rshift */
+    0,                                  /* nb_inplace_and */
+    0,                                  /* nb_inplace_xor */
+    0,                                  /* nb_inplace_or */
+    long_div,                           /* nb_floor_divide */
+    long_true_divide,                   /* nb_true_divide */
+    0,                                  /* nb_inplace_floor_divide */
+    0,                                  /* nb_inplace_true_divide */
+    long_long,                          /* nb_index */
 };
 
 PyTypeObject PyLong_Type = {
-	PyVarObject_HEAD_INIT(&PyType_Type, 0)
-	"int",					/* tp_name */
-	offsetof(PyLongObject, ob_digit),	/* tp_basicsize */
-	sizeof(digit),				/* tp_itemsize */
-	long_dealloc,				/* tp_dealloc */
-	0,					/* tp_print */
-	0,					/* tp_getattr */
-	0,					/* tp_setattr */
-	0,					/* tp_reserved */
-	long_to_decimal_string,			/* tp_repr */
-	&long_as_number,			/* tp_as_number */
-	0,					/* tp_as_sequence */
-	0,					/* tp_as_mapping */
-	(hashfunc)long_hash,			/* tp_hash */
-	0,					/* tp_call */
-	long_to_decimal_string,			/* tp_str */
-	PyObject_GenericGetAttr,		/* tp_getattro */
-	0,					/* tp_setattro */
-	0,					/* tp_as_buffer */
-	Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
-		Py_TPFLAGS_LONG_SUBCLASS,	/* tp_flags */
-	long_doc,				/* tp_doc */
-	0,					/* tp_traverse */
-	0,					/* tp_clear */
-	long_richcompare,			/* tp_richcompare */
-	0,					/* tp_weaklistoffset */
-	0,					/* tp_iter */
-	0,					/* tp_iternext */
-	long_methods,				/* tp_methods */
-	0,					/* tp_members */
-	long_getset,				/* tp_getset */
-	0,					/* tp_base */
-	0,					/* tp_dict */
-	0,					/* tp_descr_get */
-	0,					/* tp_descr_set */
-	0,					/* tp_dictoffset */
-	0,					/* tp_init */
-	0,					/* tp_alloc */
-	long_new,				/* tp_new */
-	PyObject_Del,				/* tp_free */
+    PyVarObject_HEAD_INIT(&PyType_Type, 0)
+    "int",                                      /* tp_name */
+    offsetof(PyLongObject, ob_digit),           /* tp_basicsize */
+    sizeof(digit),                              /* tp_itemsize */
+    long_dealloc,                               /* tp_dealloc */
+    0,                                          /* tp_print */
+    0,                                          /* tp_getattr */
+    0,                                          /* tp_setattr */
+    0,                                          /* tp_reserved */
+    long_to_decimal_string,                     /* tp_repr */
+    &long_as_number,                            /* tp_as_number */
+    0,                                          /* tp_as_sequence */
+    0,                                          /* tp_as_mapping */
+    (hashfunc)long_hash,                        /* tp_hash */
+    0,                                          /* tp_call */
+    long_to_decimal_string,                     /* tp_str */
+    PyObject_GenericGetAttr,                    /* tp_getattro */
+    0,                                          /* tp_setattro */
+    0,                                          /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
+        Py_TPFLAGS_LONG_SUBCLASS,               /* tp_flags */
+    long_doc,                                   /* tp_doc */
+    0,                                          /* tp_traverse */
+    0,                                          /* tp_clear */
+    long_richcompare,                           /* tp_richcompare */
+    0,                                          /* tp_weaklistoffset */
+    0,                                          /* tp_iter */
+    0,                                          /* tp_iternext */
+    long_methods,                               /* tp_methods */
+    0,                                          /* tp_members */
+    long_getset,                                /* tp_getset */
+    0,                                          /* tp_base */
+    0,                                          /* tp_dict */
+    0,                                          /* tp_descr_get */
+    0,                                          /* tp_descr_set */
+    0,                                          /* tp_dictoffset */
+    0,                                          /* tp_init */
+    0,                                          /* tp_alloc */
+    long_new,                                   /* tp_new */
+    PyObject_Del,                               /* tp_free */
 };
 
 static PyTypeObject Int_InfoType;
@@ -4721,89 +4721,89 @@ A struct sequence that holds information about Python's\n\
 internal representation of integers.  The attributes are read only.");
 
 static PyStructSequence_Field int_info_fields[] = {
-	{"bits_per_digit", "size of a digit in bits"},
-	{"sizeof_digit", "size in bytes of the C type used to "
-	                 "represent a digit"},
-	{NULL, NULL}
+    {"bits_per_digit", "size of a digit in bits"},
+    {"sizeof_digit", "size in bytes of the C type used to "
+                     "represent a digit"},
+    {NULL, NULL}
 };
 
 static PyStructSequence_Desc int_info_desc = {
-	"sys.int_info",   /* name */
-	int_info__doc__,  /* doc */
-	int_info_fields,  /* fields */
-	2                 /* number of fields */
+    "sys.int_info",   /* name */
+    int_info__doc__,  /* doc */
+    int_info_fields,  /* fields */
+    2                 /* number of fields */
 };
 
 PyObject *
 PyLong_GetInfo(void)
 {
-	PyObject* int_info;
-	int field = 0;
-	int_info = PyStructSequence_New(&Int_InfoType);
-	if (int_info == NULL)
-		return NULL;
-	PyStructSequence_SET_ITEM(int_info, field++,
-				  PyLong_FromLong(PyLong_SHIFT));
-	PyStructSequence_SET_ITEM(int_info, field++,
-				  PyLong_FromLong(sizeof(digit)));
-	if (PyErr_Occurred()) {
-		Py_CLEAR(int_info);
-		return NULL;
-	}
-	return int_info;
+    PyObject* int_info;
+    int field = 0;
+    int_info = PyStructSequence_New(&Int_InfoType);
+    if (int_info == NULL)
+        return NULL;
+    PyStructSequence_SET_ITEM(int_info, field++,
+                              PyLong_FromLong(PyLong_SHIFT));
+    PyStructSequence_SET_ITEM(int_info, field++,
+                              PyLong_FromLong(sizeof(digit)));
+    if (PyErr_Occurred()) {
+        Py_CLEAR(int_info);
+        return NULL;
+    }
+    return int_info;
 }
 
 int
 _PyLong_Init(void)
 {
 #if NSMALLNEGINTS + NSMALLPOSINTS > 0
-	int ival, size;
-	PyLongObject *v = small_ints;
-
-	for (ival = -NSMALLNEGINTS; ival <  NSMALLPOSINTS; ival++, v++) {
-		size = (ival < 0) ? -1 : ((ival == 0) ? 0 : 1);
-		if (Py_TYPE(v) == &PyLong_Type) {
-			/* The element is already initialized, most likely
-			 * the Python interpreter was initialized before.
-			 */
-			Py_ssize_t refcnt;
-			PyObject* op = (PyObject*)v;
-
-			refcnt = Py_REFCNT(op) < 0 ? 0 : Py_REFCNT(op);
-			_Py_NewReference(op);
-			/* _Py_NewReference sets the ref count to 1 but
-			 * the ref count might be larger. Set the refcnt
-			 * to the original refcnt + 1 */	 
-			Py_REFCNT(op) = refcnt + 1;
-			assert(Py_SIZE(op) == size);
-			assert(v->ob_digit[0] == abs(ival));
-		}
-		else {
-			PyObject_INIT(v, &PyLong_Type);
-		}
-		Py_SIZE(v) = size;
-		v->ob_digit[0] = abs(ival);
-	}
+    int ival, size;
+    PyLongObject *v = small_ints;
+
+    for (ival = -NSMALLNEGINTS; ival <  NSMALLPOSINTS; ival++, v++) {
+        size = (ival < 0) ? -1 : ((ival == 0) ? 0 : 1);
+        if (Py_TYPE(v) == &PyLong_Type) {
+            /* The element is already initialized, most likely
+             * the Python interpreter was initialized before.
+             */
+            Py_ssize_t refcnt;
+            PyObject* op = (PyObject*)v;
+
+            refcnt = Py_REFCNT(op) < 0 ? 0 : Py_REFCNT(op);
+            _Py_NewReference(op);
+            /* _Py_NewReference sets the ref count to 1 but
+             * the ref count might be larger. Set the refcnt
+             * to the original refcnt + 1 */
+            Py_REFCNT(op) = refcnt + 1;
+            assert(Py_SIZE(op) == size);
+            assert(v->ob_digit[0] == abs(ival));
+        }
+        else {
+            PyObject_INIT(v, &PyLong_Type);
+        }
+        Py_SIZE(v) = size;
+        v->ob_digit[0] = abs(ival);
+    }
 #endif
-	/* initialize int_info */
-	if (Int_InfoType.tp_name == 0)
-		PyStructSequence_InitType(&Int_InfoType, &int_info_desc);
+    /* initialize int_info */
+    if (Int_InfoType.tp_name == 0)
+        PyStructSequence_InitType(&Int_InfoType, &int_info_desc);
 
-	return 1;
+    return 1;
 }
 
 void
 PyLong_Fini(void)
 {
-	/* Integers are currently statically allocated. Py_DECREF is not
-	   needed, but Python must forget about the reference or multiple
-	   reinitializations will fail. */
+    /* Integers are currently statically allocated. Py_DECREF is not
+       needed, but Python must forget about the reference or multiple
+       reinitializations will fail. */
 #if NSMALLNEGINTS + NSMALLPOSINTS > 0
-	int i;
-	PyLongObject *v = small_ints;
-	for (i = 0; i < NSMALLNEGINTS + NSMALLPOSINTS; i++, v++) {
-		_Py_DEC_REFTOTAL;
-		_Py_ForgetReference((PyObject*)v);
-	}
+    int i;
+    PyLongObject *v = small_ints;
+    for (i = 0; i < NSMALLNEGINTS + NSMALLPOSINTS; i++, v++) {
+        _Py_DEC_REFTOTAL;
+        _Py_ForgetReference((PyObject*)v);
+    }
 #endif
 }