Backout f8409b3d6449: the PEP 410 is not accepted yet

1 files changed, 18 insertions, 325 deletions

diff --git a/Python/pytime.c b/Python/pytime.c
index 8679bcc..bec1c71 100644
--- a/Python/pytime.c
+++ b/Python/pytime.c
@@ -18,36 +18,24 @@
 extern int ftime(struct timeb *);
 #endif
 
-#define MICROSECONDS    1000000
-
 void
-_PyTime_get(_PyTime_t *ts)
+_PyTime_gettimeofday(_PyTime_timeval *tp)
 {
 #ifdef MS_WINDOWS
     FILETIME system_time;
     ULARGE_INTEGER large;
-    ULONGLONG value;
+    ULONGLONG microseconds;
 
     GetSystemTimeAsFileTime(&system_time);
     large.u.LowPart = system_time.dwLowDateTime;
     large.u.HighPart = system_time.dwHighDateTime;
-    /* 116,444,736,000,000,000: number of 100 ns between
+    /* 11,644,473,600,000,000: number of microseconds between
        the 1st january 1601 and the 1st january 1970 (369 years + 89 leap
        days). */
-    value = large.QuadPart - 116444736000000000;
-    ts->seconds = 0;
-    ts->numerator = value;
-    ts->denominator = (_PyTime_fraction_t)10000000;
+    microseconds = large.QuadPart / 10 - 11644473600000000;
+    tp->tv_sec = microseconds / 1000000;
+    tp->tv_usec = microseconds % 1000000;
 #else
-
-#ifdef HAVE_GETTIMEOFDAY
-    struct timeval tv;
-    int err;
-#endif
-#if defined(HAVE_FTIME)
-    struct timeb t;
-#endif
-
     /* There are three ways to get the time:
       (1) gettimeofday() -- resolution in microseconds
       (2) ftime() -- resolution in milliseconds
@@ -59,325 +47,30 @@ _PyTime_get(_PyTime_t *ts)
 
 #ifdef HAVE_GETTIMEOFDAY
 #ifdef GETTIMEOFDAY_NO_TZ
-    err = gettimeofday(&tv);
+    if (gettimeofday(tp) == 0)
+        return;
 #else /* !GETTIMEOFDAY_NO_TZ */
-    err = gettimeofday(&tv, (struct timezone *)NULL);
-#endif /* !GETTIMEOFDAY_NO_TZ */
-    if (err == 0)
-    {
-        ts->seconds = tv.tv_sec;
-        ts->numerator = tv.tv_usec;
-        ts->denominator = MICROSECONDS;
+    if (gettimeofday(tp, (struct timezone *)NULL) == 0)
         return;
-    }
+#endif /* !GETTIMEOFDAY_NO_TZ */
 #endif /* !HAVE_GETTIMEOFDAY */
 
 #if defined(HAVE_FTIME)
-    ftime(&t);
-    ts->seconds = t.time;
-    ts->numerator = t.millitm;
-    ts->denominator = 1000;
+    {
+        struct timeb t;
+        ftime(&t);
+        tp->tv_sec = t.time;
+        tp->tv_usec = t.millitm * 1000;
+    }
 #else /* !HAVE_FTIME */
-    ts->seconds = time(NULL);
-    ts->numerator = 0;
-    ts->denominator = 1;
+    tp->tv_sec = time(NULL);
+    tp->tv_usec = 0;
 #endif /* !HAVE_FTIME */
 
 #endif /* MS_WINDOWS */
 }
 
 void
-_PyTime_gettimeofday(_PyTime_timeval *tv)
-{
-    _PyTime_t ts;
-    _PyTime_fraction_t k;
-    time_t sec;
-
-    _PyTime_get(&ts);
-    tv->tv_sec = ts.seconds;
-    if (ts.numerator) {
-        if (ts.numerator > ts.denominator) {
-            sec = Py_SAFE_DOWNCAST(ts.numerator / ts.denominator,
-                                   _PyTime_fraction_t, time_t);
-            /* ignore integer overflow because _PyTime_gettimeofday() has
-               no return value */
-            tv->tv_sec += sec;
-            ts.numerator = ts.numerator % ts.denominator;
-        }
-        if (MICROSECONDS >= ts.denominator) {
-            k = (_PyTime_fraction_t)MICROSECONDS / ts.denominator;
-            tv->tv_usec = (long)(ts.numerator * k);
-        }
-        else {
-            k = ts.denominator / (_PyTime_fraction_t)MICROSECONDS;
-            tv->tv_usec = (long)(ts.numerator / k);
-        }
-    }
-    else {
-        tv->tv_usec = 0;
-    }
-}
-
-static PyObject*
-_PyLong_FromTime_t(time_t value)
-{
-#if SIZEOF_TIME_T <= SIZEOF_LONG
-    return PyLong_FromLong(value);
-#else
-    assert(sizeof(time_t) <= sizeof(PY_LONG_LONG));
-    return PyLong_FromLongLong(value);
-#endif
-}
-
-#if defined(HAVE_LONG_LONG)
-#  define _PyLong_FromTimeFraction_t PyLong_FromLongLong
-#else
-#  define _PyLong_FromTimeFraction_t PyLong_FromSize_t
-#endif
-
-/* Convert a timestamp to a PyFloat object */
-static PyObject*
-_PyTime_AsFloat(_PyTime_t *ts)
-{
-    double d;
-    d = (double)ts->seconds;
-    d += (double)ts->numerator / (double)ts->denominator;
-    return PyFloat_FromDouble(d);
-}
-
-/* Convert a timestamp to a PyLong object */
-static PyObject*
-_PyTime_AsLong(_PyTime_t *ts)
-{
-    PyObject *a, *b, *c;
-
-    a = _PyLong_FromTime_t(ts->seconds);
-    if (a == NULL)
-        return NULL;
-    b = _PyLong_FromTimeFraction_t(ts->numerator / ts->denominator);
-    if (b == NULL)
-    {
-        Py_DECREF(a);
-        return NULL;
-    }
-    c = PyNumber_Add(a, b);
-    Py_DECREF(a);
-    Py_DECREF(b);
-    return c;
-}
-
-/* Convert a timestamp to a decimal.Decimal object */
-static PyObject*
-_PyTime_AsDecimal(_PyTime_t *ts)
-{
-    static PyObject* module = NULL;
-    static PyObject* decimal = NULL;
-    static PyObject* exponent_context = NULL;
-    static PyObject* context = NULL;
-    /* exponent cache, dictionary of:
-       int (denominator) => Decimal (1/denominator) */
-    static PyObject* exponent_cache = NULL;
-    PyObject *t = NULL;
-    PyObject *key, *exponent, *quantized;
-    _Py_IDENTIFIER(quantize);
-    _Py_IDENTIFIER(__truediv__);
-
-    if (!module) {
-        module = PyImport_ImportModuleNoBlock("decimal");
-        if (module == NULL)
-            return NULL;
-    }
-
-    if (!decimal) {
-        decimal = PyObject_GetAttrString(module, "Decimal");
-        if (decimal == NULL)
-            return NULL;
-    }
-
-    if (context == NULL)
-    {
-        /* Use 12 decimal digits to store 10,000 years in seconds + 9
-           decimal digits for the floating part in nanoseconds + 1 decimal
-           digit to round correctly.
-
-           context = decimal.Context(22, rounding=decimal.ROUND_HALF_EVEN)
-           exponent_context = decimal.Context(1, rounding=decimal.ROUND_HALF_EVEN)
-        */
-        PyObject *context_class, *rounding;
-        context_class = PyObject_GetAttrString(module, "Context");
-        if (context_class == NULL)
-            return NULL;
-        rounding = PyObject_GetAttrString(module, "ROUND_HALF_EVEN");
-        if (rounding == NULL)
-        {
-            Py_DECREF(context_class);
-            return NULL;
-        }
-        context = PyObject_CallFunction(context_class, "iO", 22, rounding);
-        if (context == NULL)
-        {
-            Py_DECREF(context_class);
-            Py_DECREF(rounding);
-            return NULL;
-        }
-
-        exponent_context = PyObject_CallFunction(context_class, "iO", 1, rounding);
-        Py_DECREF(context_class);
-        Py_DECREF(rounding);
-        if (exponent_context == NULL)
-        {
-            Py_CLEAR(context);
-            return NULL;
-        }
-    }
-
-    /* t = decimal.Decimal(value) */
-    if (ts->seconds) {
-        PyObject *f = _PyLong_FromTime_t(ts->seconds);
-        t = PyObject_CallFunction(decimal, "O", f);
-        Py_CLEAR(f);
-    }
-    else {
-        t = PyObject_CallFunction(decimal, "iO", 0, context);
-    }
-    if (t == NULL)
-        return NULL;
-
-    if (ts->numerator)
-    {
-        /* t += decimal.Decimal(numerator, ctx) / decimal.Decimal(denominator, ctx) */
-        PyObject *a, *b, *c, *d, *x;
-
-        x = _PyLong_FromTimeFraction_t(ts->numerator);
-        if (x == NULL)
-            goto error;
-        a = PyObject_CallFunction(decimal, "OO", x, context);
-        Py_CLEAR(x);
-        if (a == NULL)
-            goto error;
-
-        x = _PyLong_FromTimeFraction_t(ts->denominator);
-        if (x == NULL)
-        {
-            Py_DECREF(a);
-            goto error;
-        }
-        b = PyObject_CallFunction(decimal, "OO", x, context);
-        Py_CLEAR(x);
-        if (b == NULL)
-        {
-            Py_DECREF(a);
-            goto error;
-        }
-
-        c = _PyObject_CallMethodId(a, &PyId___truediv__, "OO",
-                                   b, context);
-        Py_DECREF(a);
-        Py_DECREF(b);
-        if (c == NULL)
-            goto error;
-
-        d = PyNumber_Add(t, c);
-        Py_DECREF(c);
-        if (d == NULL)
-            goto error;
-        Py_DECREF(t);
-        t = d;
-    }
-
-    if (exponent_cache == NULL) {
-        exponent_cache = PyDict_New();
-        if (exponent_cache == NULL)
-            goto error;
-    }
-
-    key = _PyLong_FromTimeFraction_t(ts->denominator);
-    if (key == NULL)
-        goto error;
-    exponent = PyDict_GetItem(exponent_cache, key);
-    if (exponent == NULL) {
-        /* exponent = decimal.Decimal(1) / decimal.Decimal(resolution) */
-        PyObject *one, *denominator;
-
-        one = PyObject_CallFunction(decimal, "i", 1);
-        if (one == NULL) {
-            Py_DECREF(key);
-            goto error;
-        }
-
-        denominator = PyObject_CallFunction(decimal, "O", key);
-        if (denominator == NULL) {
-            Py_DECREF(key);
-            Py_DECREF(one);
-            goto error;
-        }
-
-        exponent = _PyObject_CallMethodId(one, &PyId___truediv__, "OO",
-                                          denominator, exponent_context);
-        Py_DECREF(one);
-        Py_DECREF(denominator);
-        if (exponent == NULL) {
-            Py_DECREF(key);
-            goto error;
-        }
-
-        if (PyDict_SetItem(exponent_cache, key, exponent) < 0) {
-            Py_DECREF(key);
-            Py_DECREF(exponent);
-            goto error;
-        }
-        Py_DECREF(key);
-    }
-
-    /* t = t.quantize(exponent, None, context) */
-    quantized = _PyObject_CallMethodId(t, &PyId_quantize, "OOO",
-                                       exponent, Py_None, context);
-    if (quantized == NULL)
-        goto error;
-    Py_DECREF(t);
-    t = quantized;
-
-    return t;
-
-error:
-    Py_XDECREF(t);
-    return NULL;
-}
-
-PyObject*
-_PyTime_Convert(_PyTime_t *ts, PyObject *format)
-{
-    assert(ts->denominator != 0);
-
-    if (format == NULL || (PyTypeObject *)format == &PyFloat_Type)
-        return _PyTime_AsFloat(ts);
-    if ((PyTypeObject *)format == &PyLong_Type)
-        return _PyTime_AsLong(ts);
-
-    if (PyType_Check(format))
-    {
-        PyObject *module, *name;
-        _Py_IDENTIFIER(__name__);
-        _Py_IDENTIFIER(__module__);
-
-        module = _PyObject_GetAttrId(format, &PyId___module__);
-        name = _PyObject_GetAttrId(format, &PyId___name__);
-        if (module != NULL && PyUnicode_Check(module)
-            && name != NULL && PyUnicode_Check(name))
-        {
-            if (PyUnicode_CompareWithASCIIString(module, "decimal") == 0
-                && PyUnicode_CompareWithASCIIString(name, "Decimal") == 0)
-                return _PyTime_AsDecimal(ts);
-        }
-        else
-            PyErr_Clear();
-    }
-
-    PyErr_Format(PyExc_ValueError, "Unknown timestamp format: %R", format);
-    return NULL;
-}
-
-void
 _PyTime_Init()
 {
     /* Do nothing.  Needed to force linking. */