Add functions PyUnicode_Append() and PyUnicode_AppendAndDel() that mirror

PyString_Concat() and PyString_ConcatAndDel() (the name PyUnicode_Concat()
was already taken).

Change PyObject_Repr() to always return a unicode object.

Update all repr implementations to return unicode objects.

Add a function PyObject_ReprStr8() that calls PyObject_Repr() and converts
the result to an 8bit string.

Use PyObject_ReprStr8() where using PyObject_Repr() can't be done
straightforward.

49 files changed, 385 insertions, 255 deletions

diff --git a/Include/object.h b/Include/object.h
index f50ffe6..fbeb915 100644
--- a/Include/object.h
+++ b/Include/object.h
@@ -372,6 +372,7 @@ PyAPI_FUNC(int) PyObject_Print(PyObject *, FILE *, int);
 PyAPI_FUNC(void) _Py_BreakPoint(void);
 PyAPI_FUNC(void) _PyObject_Dump(PyObject *);
 PyAPI_FUNC(PyObject *) PyObject_Repr(PyObject *);
+PyAPI_FUNC(PyObject *) PyObject_ReprStr8(PyObject *);
 PyAPI_FUNC(PyObject *) _PyObject_Str(PyObject *);
 PyAPI_FUNC(PyObject *) PyObject_Str(PyObject *);
 PyAPI_FUNC(PyObject *) PyObject_Unicode(PyObject *);
@@ -418,7 +419,7 @@ PyAPI_FUNC(long) _Py_HashDouble(double);
 PyAPI_FUNC(long) _Py_HashPointer(void*);
 
 /* Helper for passing objects to printf and the like */
-#define PyObject_REPR(obj) PyString_AS_STRING(PyObject_Repr(obj))
+#define PyObject_REPR(obj) PyString_AS_STRING(PyObject_ReprStr8(obj))
 
 /* Flag bits for printing: */
 #define Py_PRINT_RAW	1	/* No string quotes etc. */
diff --git a/Include/unicodeobject.h b/Include/unicodeobject.h
index 9b498ee..131278d 100644
--- a/Include/unicodeobject.h
+++ b/Include/unicodeobject.h
@@ -145,6 +145,8 @@ typedef PY_UNICODE_TYPE Py_UNICODE;
 # define PyUnicode_AsWideChar PyUnicodeUCS2_AsWideChar
 # define PyUnicode_Compare PyUnicodeUCS2_Compare
 # define PyUnicode_Concat PyUnicodeUCS2_Concat
+# define PyUnicode_Append PyUnicodeUCS2_Append
+# define PyUnicode_AppendAndDel PyUnicodeUCS2_AppendAndDel
 # define PyUnicode_Contains PyUnicodeUCS2_Contains
 # define PyUnicode_Count PyUnicodeUCS2_Count
 # define PyUnicode_Decode PyUnicodeUCS2_Decode
@@ -227,6 +229,8 @@ typedef PY_UNICODE_TYPE Py_UNICODE;
 # define PyUnicode_AsWideChar PyUnicodeUCS4_AsWideChar
 # define PyUnicode_Compare PyUnicodeUCS4_Compare
 # define PyUnicode_Concat PyUnicodeUCS4_Concat
+# define PyUnicode_Append PyUnicodeUCS4_Append
+# define PyUnicode_AppendAndDel PyUnicodeUCS4_AppendAndDel
 # define PyUnicode_Contains PyUnicodeUCS4_Contains
 # define PyUnicode_Count PyUnicodeUCS4_Count
 # define PyUnicode_Decode PyUnicodeUCS4_Decode
@@ -1020,6 +1024,22 @@ PyAPI_FUNC(PyObject*) PyUnicode_Concat(
     PyObject *right	 	/* Right string */
     );
 
+/* Concat two strings and put the result in *pleft
+   (sets *pleft to NULL on error) */
+
+PyAPI_FUNC(void) PyUnicode_Append(
+    PyObject **pleft,	 	/* Pointer to left string */
+    PyObject *right	 	/* Right string */
+    );
+
+/* Concat two strings, put the result in *pleft and drop the right object
+   (sets *pleft to NULL on error) */
+
+PyAPI_FUNC(void) PyUnicode_AppendAndDel(
+    PyObject **pleft,	 	/* Pointer to left string */
+    PyObject *right	 	/* Right string */
+    );
+
 /* Split a string giving a list of Unicode strings.
 
    If sep is NULL, splitting will be done at all whitespace
diff --git a/Mac/Modules/cf/_CFmodule.c b/Mac/Modules/cf/_CFmodule.c
index 3f4d4f2..8d78022 100644
--- a/Mac/Modules/cf/_CFmodule.c
+++ b/Mac/Modules/cf/_CFmodule.c
@@ -392,7 +392,7 @@ static PyObject * CFTypeRefObj_repr(CFTypeRefObject *self)
 {
 	char buf[100];
 	sprintf(buf, "<CFTypeRef type-%d object at 0x%8.8x for 0x%8.8x>", (int)CFGetTypeID(self->ob_itself), (unsigned)self, (unsigned)self->ob_itself);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static int CFTypeRefObj_hash(CFTypeRefObject *self)
@@ -596,7 +596,7 @@ static PyObject * CFArrayRefObj_repr(CFArrayRefObject *self)
 {
 	char buf[100];
 	sprintf(buf, "<CFArrayRef object at 0x%8.8x for 0x%8.8x>", (unsigned)self, (unsigned)self->ob_itself);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static int CFArrayRefObj_hash(CFArrayRefObject *self)
@@ -836,7 +836,7 @@ static PyObject * CFMutableArrayRefObj_repr(CFMutableArrayRefObject *self)
 {
 	char buf[100];
 	sprintf(buf, "<CFMutableArrayRef object at 0x%8.8x for 0x%8.8x>", (unsigned)self, (unsigned)self->ob_itself);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static int CFMutableArrayRefObj_hash(CFMutableArrayRefObject *self)
@@ -1029,7 +1029,7 @@ static PyObject * CFDictionaryRefObj_repr(CFDictionaryRefObject *self)
 {
 	char buf[100];
 	sprintf(buf, "<CFDictionaryRef object at 0x%8.8x for 0x%8.8x>", (unsigned)self, (unsigned)self->ob_itself);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static int CFDictionaryRefObj_hash(CFDictionaryRefObject *self)
@@ -1206,7 +1206,7 @@ static PyObject * CFMutableDictionaryRefObj_repr(CFMutableDictionaryRefObject *s
 {
 	char buf[100];
 	sprintf(buf, "<CFMutableDictionaryRef object at 0x%8.8x for 0x%8.8x>", (unsigned)self, (unsigned)self->ob_itself);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static int CFMutableDictionaryRefObj_hash(CFMutableDictionaryRefObject *self)
@@ -1437,7 +1437,7 @@ static PyObject * CFDataRefObj_repr(CFDataRefObject *self)
 {
 	char buf[100];
 	sprintf(buf, "<CFDataRef object at 0x%8.8x for 0x%8.8x>", (unsigned)self, (unsigned)self->ob_itself);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static int CFDataRefObj_hash(CFDataRefObject *self)
@@ -1702,7 +1702,7 @@ static PyObject * CFMutableDataRefObj_repr(CFMutableDataRefObject *self)
 {
 	char buf[100];
 	sprintf(buf, "<CFMutableDataRef object at 0x%8.8x for 0x%8.8x>", (unsigned)self, (unsigned)self->ob_itself);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static int CFMutableDataRefObj_hash(CFMutableDataRefObject *self)
@@ -2444,7 +2444,7 @@ static PyObject * CFStringRefObj_repr(CFStringRefObject *self)
 {
 	char buf[100];
 	sprintf(buf, "<CFStringRef object at 0x%8.8x for 0x%8.8x>", (unsigned)self, (unsigned)self->ob_itself);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static int CFStringRefObj_hash(CFStringRefObject *self)
@@ -2832,7 +2832,7 @@ static PyObject * CFMutableStringRefObj_repr(CFMutableStringRefObject *self)
 {
 	char buf[100];
 	sprintf(buf, "<CFMutableStringRef object at 0x%8.8x for 0x%8.8x>", (unsigned)self, (unsigned)self->ob_itself);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static int CFMutableStringRefObj_hash(CFMutableStringRefObject *self)
@@ -3484,7 +3484,7 @@ static PyObject * CFURLRefObj_repr(CFURLRefObject *self)
 {
 	char buf[100];
 	sprintf(buf, "<CFURL object at 0x%8.8x for 0x%8.8x>", (unsigned)self, (unsigned)self->ob_itself);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static int CFURLRefObj_hash(CFURLRefObject *self)
diff --git a/Mac/Modules/file/_Filemodule.c b/Mac/Modules/file/_Filemodule.c
index 07bd341..768f1a2 100644
--- a/Mac/Modules/file/_Filemodule.c
+++ b/Mac/Modules/file/_Filemodule.c
@@ -1393,7 +1393,7 @@ static PyObject * FSSpec_repr(FSSpecObject *self)
 	        self->ob_itself.vRefNum,
 	        self->ob_itself.parID,
 	        self->ob_itself.name[0], self->ob_itself.name+1);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 #define FSSpec_hash NULL
diff --git a/Mac/Modules/win/_Winmodule.c b/Mac/Modules/win/_Winmodule.c
index fa8c52d..3841775 100644
--- a/Mac/Modules/win/_Winmodule.c
+++ b/Mac/Modules/win/_Winmodule.c
@@ -2580,7 +2580,7 @@ static PyObject * WinObj_repr(WindowObject *self)
 {
 	char buf[100];
 	sprintf(buf, "<Window object at 0x%8.8x for 0x%8.8x>", (unsigned)self, (unsigned)self->ob_itself);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static int WinObj_hash(WindowObject *self)
diff --git a/Modules/_codecsmodule.c b/Modules/_codecsmodule.c
index b165f97..cd766c3 100644
--- a/Modules/_codecsmodule.c
+++ b/Modules/_codecsmodule.c
@@ -161,27 +161,63 @@ static PyObject *
 escape_encode(PyObject *self,
 	      PyObject *args)
 {
+	static const char *hexdigits = "0123456789abcdef";
 	PyObject *str;
+	Py_ssize_t size;
+	Py_ssize_t newsize;
 	const char *errors = NULL;
-	char *buf;
-	Py_ssize_t len;
+	PyObject *v;
 
 	if (!PyArg_ParseTuple(args, "O!|z:escape_encode",
 			      &PyString_Type, &str, &errors))
 		return NULL;
 
-	str = PyString_Repr(str, 0);
-	if (!str)
-		return NULL;
+	size = PyUnicode_GET_SIZE(str);
+	newsize = 4*size;
+	if (newsize > PY_SSIZE_T_MAX || newsize / 4 != size) {
+		PyErr_SetString(PyExc_OverflowError,
+			"string is too large to encode");
+			return NULL;
+	}
+	v = PyBytes_FromStringAndSize(NULL, newsize);
 
-	/* The string will be quoted. Unquote, similar to unicode-escape. */
-	buf = PyString_AS_STRING (str);
-	len = PyString_GET_SIZE (str);
-	memmove(buf, buf+1, len-2);
-	if (_PyString_Resize(&str, len-2) < 0)
+	if (v == NULL) {
 		return NULL;
+	}
+	else {
+		register Py_ssize_t i;
+		register char c;
+		register char *p = PyBytes_AS_STRING(v);
+
+		for (i = 0; i < size; i++) {
+			/* There's at least enough room for a hex escape */
+			assert(newsize - (p - PyBytes_AS_STRING(v)) >= 4);
+			c = PyString_AS_STRING(str)[i];
+			if (c == '\'' || c == '\\')
+				*p++ = '\\', *p++ = c;
+			else if (c == '\t')
+				*p++ = '\\', *p++ = 't';
+			else if (c == '\n')
+				*p++ = '\\', *p++ = 'n';
+			else if (c == '\r')
+				*p++ = '\\', *p++ = 'r';
+			else if (c < ' ' || c >= 0x7f) {
+				*p++ = '\\';
+				*p++ = 'x';
+				*p++ = hexdigits[(c & 0xf0) >> 4];
+				*p++ = hexdigits[c & 0xf];
+			}
+			else
+				*p++ = c;
+		}
+		*p = '\0';
+		if (PyBytes_Resize(v, (p - PyBytes_AS_STRING(v)))) {
+			Py_DECREF(v);
+			return NULL;
+		}
+	}
 	
-	return codec_tuple(str, PyString_Size(str));
+	return codec_tuple(v, PyBytes_Size(v));
 }
 
 /* --- Decoder ------------------------------------------------------------ */
diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c
index 2960665..1311d4d 100644
--- a/Modules/_collectionsmodule.c
+++ b/Modules/_collectionsmodule.c
@@ -611,14 +611,14 @@ PyDoc_STRVAR(reduce_doc, "Return state information for pickling.");
 static PyObject *
 deque_repr(PyObject *deque)
 {
-	PyObject *aslist, *result, *fmt;
+	PyObject *aslist, *result;
 	int i;
 
 	i = Py_ReprEnter(deque);
 	if (i != 0) {
 		if (i < 0)
 			return NULL;
-		return PyString_FromString("[...]");
+		return PyUnicode_FromString("[...]");
 	}
 
 	aslist = PySequence_List(deque);
@@ -627,14 +627,14 @@ deque_repr(PyObject *deque)
 		return NULL;
 	}
 
-	fmt = PyString_FromString("deque(%r)");
-	if (fmt == NULL) {
+	result = PyUnicode_FromString("deque(");
+	if (result == NULL) {
 		Py_DECREF(aslist);
 		Py_ReprLeave(deque);
 		return NULL;
 	}
-	result = PyString_Format(fmt, aslist);
-	Py_DECREF(fmt);
+	PyUnicode_AppendAndDel(&result, PyObject_Repr(aslist));
+	PyUnicode_AppendAndDel(&result, PyUnicode_FromString(")"));
 	Py_DECREF(aslist);
 	Py_ReprLeave(deque);
 	return result;
@@ -1215,18 +1215,18 @@ defdict_repr(defdictobject *dd)
 	if (baserepr == NULL)
 		return NULL;
 	if (dd->default_factory == NULL)
-		defrepr = PyString_FromString("None");
+		defrepr = PyUnicode_FromString("None");
 	else
 		defrepr = PyObject_Repr(dd->default_factory);
 	if (defrepr == NULL) {
 		Py_DECREF(baserepr);
 		return NULL;
 	}
-	result = PyString_FromFormat("defaultdict(%s, %s)",
-				     PyString_AS_STRING(defrepr),
-				     PyString_AS_STRING(baserepr));
-	Py_DECREF(defrepr);
-	Py_DECREF(baserepr);
+	result = PyUnicode_FromString("defaultdict(");
+	PyUnicode_AppendAndDel(&result, defrepr);
+	PyUnicode_AppendAndDel(&result, PyUnicode_FromString(", "));
+	PyUnicode_AppendAndDel(&result, baserepr);
+	PyUnicode_AppendAndDel(&result, PyUnicode_FromString(")"));
 	return result;
 }
 
diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c
index e7effbe..55ef0b7 100644
--- a/Modules/_ctypes/_ctypes.c
+++ b/Modules/_ctypes/_ctypes.c
@@ -3446,12 +3446,12 @@ CFuncPtr_repr(CFuncPtrObject *self)
 {
 #ifdef MS_WIN32
 	if (self->index)
-		return PyString_FromFormat("<COM method offset %d: %s at %p>",
+		return PyUnicode_FromFormat("<COM method offset %d: %s at %p>",
 					   self->index - 0x1000,
 					   self->ob_type->tp_name,
 					   self);
 #endif
-	return PyString_FromFormat("<%s object at %p>",
+	return PyUnicode_FromFormat("<%s object at %p>",
 				   self->ob_type->tp_name,
 				   self);
 }
@@ -4081,12 +4081,12 @@ Simple_repr(CDataObject *self)
 	static PyObject *format;
 
 	if (self->ob_type->tp_base != &Simple_Type) {
-		return PyString_FromFormat("<%s object at %p>",
+		return PyUnicode_FromFormat("<%s object at %p>",
 					   self->ob_type->tp_name, self);
 	}
 
 	if (format == NULL) {
-		format = PyString_FromString("%s(%r)");
+		format = PyUnicode_FromString("%s(%r)");
 		if (format == NULL)
 			return NULL;
 	}
@@ -4095,7 +4095,7 @@ Simple_repr(CDataObject *self)
 	if (val == NULL)
 		return NULL;
 
-	name = PyString_FromString(self->ob_type->tp_name);
+	name = PyUnicode_FromString(self->ob_type->tp_name);
 	if (name == NULL) {
 		Py_DECREF(val);
 		return NULL;
@@ -4107,7 +4107,7 @@ Simple_repr(CDataObject *self)
 	if (args == NULL)
 		return NULL;
 
-	result = PyString_Format(format, args);
+	result = PyUnicode_Format(format, args);
 	Py_DECREF(args);
 	return result;
 }
diff --git a/Modules/_ctypes/callproc.c b/Modules/_ctypes/callproc.c
index 94cd6f7..ba1629d 100644
--- a/Modules/_ctypes/callproc.c
+++ b/Modules/_ctypes/callproc.c
@@ -370,7 +370,7 @@ PyCArg_repr(PyCArgObject *self)
 			self->tag, (long)self);
 		break;
 	}
-	return PyString_FromString(buffer);
+	return PyUnicode_FromString(buffer);
 }
 
 static PyMemberDef PyCArgType_members[] = {
diff --git a/Modules/_ctypes/cfield.c b/Modules/_ctypes/cfield.c
index 6b0a526..5874f52 100644
--- a/Modules/_ctypes/cfield.c
+++ b/Modules/_ctypes/cfield.c
@@ -275,7 +275,7 @@ CField_repr(CFieldObject *self)
 	name = ((PyTypeObject *)self->proto)->tp_name;
 
 	if (bits)
-		result = PyString_FromFormat(
+		result = PyUnicode_FromFormat(
 #if (PY_VERSION_HEX < 0x02050000)
 			"<Field type=%s, ofs=%d:%d, bits=%d>",
 #else
@@ -283,7 +283,7 @@ CField_repr(CFieldObject *self)
 #endif
 			name, self->offset, size, bits);
 	else
-		result = PyString_FromFormat(
+		result = PyUnicode_FromFormat(
 #if (PY_VERSION_HEX < 0x02050000)
 			"<Field type=%s, ofs=%d, size=%d>",
 #else
diff --git a/Modules/_elementtree.c b/Modules/_elementtree.c
index b2bbbcf..442ab83 100644
--- a/Modules/_elementtree.c
+++ b/Modules/_elementtree.c
@@ -1121,12 +1121,12 @@ element_repr(ElementObject* self)
     PyObject* repr;
     char buffer[100];
     
-    repr = PyString_FromString("<Element ");
+    repr = PyUnicode_FromString("<Element ");
 
-    PyString_ConcatAndDel(&repr, PyObject_Repr(self->tag));
+    PyUnicode_AppendAndDel(&repr, PyObject_Repr(self->tag));
 
     sprintf(buffer, " at %p>", self);
-    PyString_ConcatAndDel(&repr, PyString_FromString(buffer));
+    PyUnicode_AppendAndDel(&repr, PyUnicode_FromString(buffer));
 
     return repr;
 }
diff --git a/Modules/_fileio.c b/Modules/_fileio.c
index d524aa7..2bda155 100644
--- a/Modules/_fileio.c
+++ b/Modules/_fileio.c
@@ -580,9 +580,9 @@ static PyObject *
 fileio_repr(PyFileIOObject *self)
 {
         if (self->fd < 0)
-		return PyString_FromFormat("_fileio._FileIO(-1)");
+		return PyUnicode_FromFormat("_fileio._FileIO(-1)");
 
-	return PyString_FromFormat("_fileio._FileIO(%d, '%s')",
+	return PyUnicode_FromFormat("_fileio._FileIO(%d, '%s')",
 				   self->fd, mode_string(self));
 }
 
diff --git a/Modules/_hashopenssl.c b/Modules/_hashopenssl.c
index 859644f..98c91d1 100644
--- a/Modules/_hashopenssl.c
+++ b/Modules/_hashopenssl.c
@@ -221,7 +221,7 @@ EVP_repr(PyObject *self)
     char buf[100];
     PyOS_snprintf(buf, sizeof(buf), "<%s HASH object @ %p>",
             PyString_AsString(((EVPobject *)self)->name), self);
-    return PyString_FromString(buf);
+    return PyUnicode_FromString(buf);
 }
 
 #if HASH_OBJ_CONSTRUCTOR
diff --git a/Modules/_tkinter.c b/Modules/_tkinter.c
index f879a05..fe568fa 100644
--- a/Modules/_tkinter.c
+++ b/Modules/_tkinter.c
@@ -812,7 +812,7 @@ PyTclObject_repr(PyTclObject *self)
 	char buf[50];
 	PyOS_snprintf(buf, 50, "<%s object at %p>",
 		      self->value->typePtr->name, self->value);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static int
@@ -2375,7 +2375,7 @@ Tktt_Repr(PyObject *self)
 
 	PyOS_snprintf(buf, sizeof(buf), "<tktimertoken at %p%s>", v,
 	                v->func == NULL ? ", handler deleted" : "");
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static PyObject *
diff --git a/Modules/arraymodule.c b/Modules/arraymodule.c
index a5fd503..d61b1ae 100644
--- a/Modules/arraymodule.c
+++ b/Modules/arraymodule.c
@@ -1574,7 +1574,7 @@ array_repr(arrayobject *a)
 	typecode = a->ob_descr->typecode;
 	if (len == 0) {
 		PyOS_snprintf(buf, sizeof(buf), "array('%c')", typecode);
-		return PyString_FromString(buf);
+		return PyUnicode_FromString(buf);
 	}
 		
 	if (typecode == 'c')
@@ -1587,9 +1587,9 @@ array_repr(arrayobject *a)
 	Py_XDECREF(v);
 
 	PyOS_snprintf(buf, sizeof(buf), "array('%c', ", typecode);
-	s = PyString_FromString(buf);
-	PyString_ConcatAndDel(&s, t);
-	PyString_ConcatAndDel(&s, PyString_FromString(")"));
+	s = PyUnicode_FromString(buf);
+	PyUnicode_AppendAndDel(&s, t);
+	PyUnicode_AppendAndDel(&s, PyUnicode_FromString(")"));
 	return s;
 }
 
diff --git a/Modules/cPickle.c b/Modules/cPickle.c
index 9adcbde..68990c9 100644
--- a/Modules/cPickle.c
+++ b/Modules/cPickle.c
@@ -1122,7 +1122,7 @@ save_long(Picklerobject *self, PyObject *args)
 	/* proto < 2:  write the repr and newline.  This is quadratic-time
 	 * (in the number of digits), in both directions.
 	 */
-	if (!( repr = PyObject_Repr(args)))
+	if (!( repr = PyObject_ReprStr8(args)))
 		goto finally;
 
 	if ((size = PyString_Size(repr)) < 0)
@@ -1189,7 +1189,7 @@ save_string(Picklerobject *self, PyObject *args, int doput)
 
 		static char string = STRING;
 
-		if (!( repr = PyObject_Repr(args)))
+		if (!( repr = PyObject_ReprStr8(args)))
 			return -1;
 
 		if ((len = PyString_Size(repr)) < 0)
diff --git a/Modules/datetimemodule.c b/Modules/datetimemodule.c
index c31d8e6..5d3c679 100644
--- a/Modules/datetimemodule.c
+++ b/Modules/datetimemodule.c
@@ -1044,27 +1044,27 @@ append_keyword_tzinfo(PyObject *repr, PyObject *tzinfo)
 {
 	PyObject *temp;
 
-	assert(PyString_Check(repr));
+	assert(PyUnicode_Check(repr));
 	assert(tzinfo);
 	if (tzinfo == Py_None)
 		return repr;
 	/* Get rid of the trailing ')'. */
-	assert(PyString_AsString(repr)[PyString_Size(repr)-1] == ')');
-	temp = PyString_FromStringAndSize(PyString_AsString(repr),
-					  PyString_Size(repr) - 1);
+	assert(PyUnicode_AS_UNICODE(repr)[PyUnicode_GET_SIZE(repr)-1] == ')');
+	temp = PyUnicode_FromUnicode(PyUnicode_AS_UNICODE(repr),
+					  PyUnicode_GET_SIZE(repr) - 1);
 	Py_DECREF(repr);
 	if (temp == NULL)
 		return NULL;
 	repr = temp;
 
 	/* Append ", tzinfo=". */
-	PyString_ConcatAndDel(&repr, PyString_FromString(", tzinfo="));
+	PyUnicode_AppendAndDel(&repr, PyUnicode_FromString(", tzinfo="));
 
 	/* Append repr(tzinfo). */
-	PyString_ConcatAndDel(&repr, PyObject_Repr(tzinfo));
+	PyUnicode_AppendAndDel(&repr, PyObject_Repr(tzinfo));
 
 	/* Add a closing paren. */
-	PyString_ConcatAndDel(&repr, PyString_FromString(")"));
+	PyUnicode_AppendAndDel(&repr, PyUnicode_FromString(")"));
 	return repr;
 }
 
@@ -1972,18 +1972,18 @@ static PyObject *
 delta_repr(PyDateTime_Delta *self)
 {
 	if (GET_TD_MICROSECONDS(self) != 0)
-		return PyString_FromFormat("%s(%d, %d, %d)",
+		return PyUnicode_FromFormat("%s(%d, %d, %d)",
 					   self->ob_type->tp_name,
 					   GET_TD_DAYS(self),
 					   GET_TD_SECONDS(self),
 					   GET_TD_MICROSECONDS(self));
 	if (GET_TD_SECONDS(self) != 0)
-		return PyString_FromFormat("%s(%d, %d)",
+		return PyUnicode_FromFormat("%s(%d, %d)",
 					   self->ob_type->tp_name,
 					   GET_TD_DAYS(self),
 					   GET_TD_SECONDS(self));
 
-	return PyString_FromFormat("%s(%d)",
+	return PyUnicode_FromFormat("%s(%d)",
 				   self->ob_type->tp_name,
 				   GET_TD_DAYS(self));
 }
@@ -2410,7 +2410,7 @@ date_repr(PyDateTime_Date *self)
 		      type_name,
 		      GET_YEAR(self), GET_MONTH(self), GET_DAY(self));
 
-	return PyString_FromString(buffer);
+	return PyUnicode_FromString(buffer);
 }
 
 static PyObject *
@@ -3131,7 +3131,7 @@ time_repr(PyDateTime_Time *self)
 	else
 		PyOS_snprintf(buffer, sizeof(buffer),
 			      "%s(%d, %d)", type_name, h, m);
-	result = PyString_FromString(buffer);
+	result = PyUnicode_FromString(buffer);
 	if (result != NULL && HASTZINFO(self))
 		result = append_keyword_tzinfo(result, self->tzinfo);
 	return result;
@@ -4043,7 +4043,7 @@ datetime_repr(PyDateTime_DateTime *self)
 			      GET_YEAR(self), GET_MONTH(self), GET_DAY(self),
 			      DATE_GET_HOUR(self), DATE_GET_MINUTE(self));
 	}
-	baserepr = PyString_FromString(buffer);
+	baserepr = PyUnicode_FromString(buffer);
 	if (baserepr == NULL || ! HASTZINFO(self))
 		return baserepr;
 	return append_keyword_tzinfo(baserepr, self->tzinfo);
diff --git a/Modules/itertoolsmodule.c b/Modules/itertoolsmodule.c
index eb73f07..c3f198e 100644
--- a/Modules/itertoolsmodule.c
+++ b/Modules/itertoolsmodule.c
@@ -2084,7 +2084,7 @@ count_next(countobject *lz)
 static PyObject *
 count_repr(countobject *lz)
 {
-	return PyString_FromFormat("count(%zd)", lz->cnt);
+	return PyUnicode_FromFormat("count(%zd)", lz->cnt);
 }
 
 PyDoc_STRVAR(count_doc,
@@ -2396,11 +2396,11 @@ repeat_repr(repeatobject *ro)
 		return NULL;
 
 	if (ro->cnt == -1)
-		result = PyString_FromFormat("repeat(%s)",
-			PyString_AS_STRING(objrepr));
+		result = PyUnicode_FromFormat("repeat(%U)",
+			objrepr);
 	else
-		result = PyString_FromFormat("repeat(%s, %zd)",
-			PyString_AS_STRING(objrepr), ro->cnt);
+		result = PyUnicode_FromFormat("repeat(%U, %zd)",
+			objrepr, ro->cnt);
 	Py_DECREF(objrepr);
 	return result;
 }	
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 38ffba7..4e62316 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -2865,7 +2865,7 @@ sock_repr(PySocketSockObject *s)
 		(long)s->sock_fd, s->sock_family,
 		s->sock_type,
 		s->sock_proto);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 
diff --git a/Modules/zipimport.c b/Modules/zipimport.c
index 69b2881..fd139f2 100644
--- a/Modules/zipimport.c
+++ b/Modules/zipimport.c
@@ -203,7 +203,7 @@ zipimporter_repr(ZipImporter *self)
 		PyOS_snprintf(buf, sizeof(buf),
 			      "<zipimporter object \"%.300s\">",
 			      archive);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 /* return fullname.split(".")[-1] */
diff --git a/Objects/boolobject.c b/Objects/boolobject.c
index f98af9f..0a9f958 100644
--- a/Objects/boolobject.c
+++ b/Objects/boolobject.c
@@ -24,10 +24,10 @@ bool_repr(PyObject *self)
 
 	if (self == Py_True)
 		s = true_str ? true_str :
-			(true_str = PyString_InternFromString("True"));
+			(true_str = PyUnicode_FromString("True"));
 	else
 		s = false_str ? false_str :
-			(false_str = PyString_InternFromString("False"));
+			(false_str = PyUnicode_FromString("False"));
 	Py_XINCREF(s);
 	return s;
 }
diff --git a/Objects/bufferobject.c b/Objects/bufferobject.c
index eb02e32..dd25668 100644
--- a/Objects/bufferobject.c
+++ b/Objects/bufferobject.c
@@ -319,13 +319,13 @@ buffer_repr(PyBufferObject *self)
 	const char *status = self->b_readonly ? "read-only" : "read-write";
 
 	if ( self->b_base == NULL )
-		return PyString_FromFormat("<%s buffer ptr %p, size %zd at %p>",
+		return PyUnicode_FromFormat("<%s buffer ptr %p, size %zd at %p>",
 					   status,
 					   self->b_ptr,
 					   self->b_size,
 					   self);
 	else
-		return PyString_FromFormat(
+		return PyUnicode_FromFormat(
 			"<%s buffer for %p, size %zd, offset %zd at %p>",
 			status,
 			self->b_base,
diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index 2cdaf37..2a1dbcb 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -815,6 +815,7 @@ bytes_init(PyBytesObject *self, PyObject *args, PyObject *kwds)
 static PyObject *
 bytes_repr(PyBytesObject *self)
 {
+    static const char *hexdigits = "0123456789abcdef";
     size_t newsize = 3 + 4 * self->ob_size;
     PyObject *v;
     if (newsize > PY_SSIZE_T_MAX || newsize / 4 != self->ob_size) {
@@ -822,23 +823,23 @@ bytes_repr(PyBytesObject *self)
             "bytes object is too large to make repr");
         return NULL;
     }
-    v = PyString_FromStringAndSize((char *)NULL, newsize);
+    v = PyUnicode_FromUnicode(NULL, newsize);
     if (v == NULL) {
         return NULL;
     }
     else {
         register Py_ssize_t i;
-        register char c;
-        register char *p;
+        register Py_UNICODE c;
+        register Py_UNICODE *p;
         int quote = '\'';
 
-        p = PyString_AS_STRING(v);
+        p = PyUnicode_AS_UNICODE(v);
         *p++ = 'b';
         *p++ = quote;
         for (i = 0; i < self->ob_size; i++) {
             /* There's at least enough room for a hex escape
                and a closing quote. */
-            assert(newsize - (p - PyString_AS_STRING(v)) >= 5);
+            assert(newsize - (p - PyUnicode_AS_UNICODE(v)) >= 5);
             c = self->ob_bytes[i];
             if (c == quote || c == '\\')
                 *p++ = '\\', *p++ = c;
@@ -851,20 +852,21 @@ bytes_repr(PyBytesObject *self)
             else if (c == 0)
                 *p++ = '\\', *p++ = 'x', *p++ = '0', *p++ = '0';
             else if (c < ' ' || c >= 0x7f) {
-                /* For performance, we don't want to call
-                   PyOS_snprintf here (extra layers of
-                   function call). */
-                sprintf(p, "\\x%02x", c & 0xff);
-                                p += 4;
+                *p++ = '\\';
+                *p++ = 'x';
+                *p++ = hexdigits[(c & 0xf0) >> 4];
+                *p++ = hexdigits[c & 0xf];
             }
             else
                 *p++ = c;
         }
-        assert(newsize - (p - PyString_AS_STRING(v)) >= 1);
+        assert(newsize - (p - PyUnicode_AS_UNICODE(v)) >= 1);
         *p++ = quote;
         *p = '\0';
-        _PyString_Resize(
-            &v, (p - PyString_AS_STRING(v)));
+        if (PyUnicode_Resize(&v, (p - PyUnicode_AS_UNICODE(v)))) {
+            Py_DECREF(v);
+            return NULL;
+        }
         return v;
     }
 }
diff --git a/Objects/cellobject.c b/Objects/cellobject.c
index 74fa247..1a19c6a 100644
--- a/Objects/cellobject.c
+++ b/Objects/cellobject.c
@@ -53,9 +53,9 @@ static PyObject *
 cell_repr(PyCellObject *op)
 {
 	if (op->ob_ref == NULL)
-		return PyString_FromFormat("<cell at %p: empty>", op);
+		return PyUnicode_FromFormat("<cell at %p: empty>", op);
 
-	return PyString_FromFormat("<cell at %p: %.80s object at %p>",
+	return PyUnicode_FromFormat("<cell at %p: %.80s object at %p>",
 				   op, op->ob_ref->ob_type->tp_name,
 				   op->ob_ref);
 }
diff --git a/Objects/classobject.c b/Objects/classobject.c
index 85826a9..e4687a3 100644
--- a/Objects/classobject.c
+++ b/Objects/classobject.c
@@ -258,23 +258,15 @@ method_repr(PyMethodObject *a)
 			sklassname = PyString_AS_STRING(klassname);
 	}
 	if (self == NULL)
-		result = PyString_FromFormat("<unbound method %s.%s>",
+		result = PyUnicode_FromFormat("<unbound method %s.%s>",
 					     sklassname, sfuncname);
 	else {
+		result = PyUnicode_FromFormat("<bound method %s.%s of ",
+		                              sklassname, sfuncname);
 		/* XXX Shouldn't use repr() here! */
-		PyObject *selfrepr = PyObject_Repr(self);
-		if (selfrepr == NULL)
-			goto fail;
-		if (!PyString_Check(selfrepr)) {
-			Py_DECREF(selfrepr);
-			goto fail;
-		}
-		result = PyString_FromFormat("<bound method %s.%s of %s>",
-					     sklassname, sfuncname,
-					     PyString_AS_STRING(selfrepr));
-		Py_DECREF(selfrepr);
+		PyUnicode_AppendAndDel(&result, PyObject_Repr(self));
+		PyUnicode_AppendAndDel(&result, PyUnicode_FromString(">"));
 	}
-  fail:
 	Py_XDECREF(funcname);
 	Py_XDECREF(klassname);
 	return result;
diff --git a/Objects/codeobject.c b/Objects/codeobject.c
index 6d5daa8..fc7a7db 100644
--- a/Objects/codeobject.c
+++ b/Objects/codeobject.c
@@ -300,7 +300,7 @@ code_repr(PyCodeObject *co)
 	PyOS_snprintf(buf, sizeof(buf),
 		      "<code object %.100s at %p, file \"%.300s\", line %d>",
 		      name, co, filename, lineno);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static PyObject *
diff --git a/Objects/complexobject.c b/Objects/complexobject.c
index b65a982..0d4b755 100644
--- a/Objects/complexobject.c
+++ b/Objects/complexobject.c
@@ -342,7 +342,7 @@ complex_repr(PyComplexObject *v)
 {
 	char buf[100];
 	complex_to_buf(buf, sizeof(buf), v, PREC_REPR);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static PyObject *
diff --git a/Objects/descrobject.c b/Objects/descrobject.c
index d6b789d..e9ccefa 100644
--- a/Objects/descrobject.c
+++ b/Objects/descrobject.c
@@ -24,35 +24,35 @@ descr_name(PyDescrObject *descr)
 static PyObject *
 descr_repr(PyDescrObject *descr, char *format)
 {
-	return PyString_FromFormat(format, descr_name(descr),
+	return PyUnicode_FromFormat(format, descr_name(descr),
 				   descr->d_type->tp_name);
 }
 
 static PyObject *
 method_repr(PyMethodDescrObject *descr)
 {
-	return descr_repr((PyDescrObject *)descr, 
+	return descr_repr((PyDescrObject *)descr,
 			  "<method '%s' of '%s' objects>");
 }
 
 static PyObject *
 member_repr(PyMemberDescrObject *descr)
 {
-	return descr_repr((PyDescrObject *)descr, 
+	return descr_repr((PyDescrObject *)descr,
 			  "<member '%s' of '%s' objects>");
 }
 
 static PyObject *
 getset_repr(PyGetSetDescrObject *descr)
 {
-	return descr_repr((PyDescrObject *)descr, 
+	return descr_repr((PyDescrObject *)descr,
 			  "<attribute '%s' of '%s' objects>");
 }
 
 static PyObject *
 wrapperdescr_repr(PyWrapperDescrObject *descr)
 {
-	return descr_repr((PyDescrObject *)descr, 
+	return descr_repr((PyDescrObject *)descr,
 			  "<slot wrapper '%s' of '%s' objects>");
 }
 
@@ -917,7 +917,7 @@ wrapper_hash(wrapperobject *wp)
 static PyObject *
 wrapper_repr(wrapperobject *wp)
 {
-	return PyString_FromFormat("<method-wrapper '%s' of %s object at %p>",
+	return PyUnicode_FromFormat("<method-wrapper '%s' of %s object at %p>",
 				   wp->descr->d_base->name,
 				   wp->self->ob_type->tp_name,
 				   wp->self);
diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index 1da24f4..b45a664 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -941,11 +941,11 @@ dict_repr(dictobject *mp)
 
 	i = Py_ReprEnter((PyObject *)mp);
 	if (i != 0) {
-		return i > 0 ? PyString_FromString("{...}") : NULL;
+		return i > 0 ? PyUnicode_FromString("{...}") : NULL;
 	}
 
 	if (mp->ma_used == 0) {
-		result = PyString_FromString("{}");
+		result = PyUnicode_FromString("{}");
 		goto Done;
 	}
 
@@ -953,7 +953,7 @@ dict_repr(dictobject *mp)
 	if (pieces == NULL)
 		goto Done;
 
-	colon = PyString_FromString(": ");
+	colon = PyUnicode_FromString(": ");
 	if (colon == NULL)
 		goto Done;
 
@@ -965,8 +965,8 @@ dict_repr(dictobject *mp)
 		/* Prevent repr from deleting value during key format. */
 		Py_INCREF(value);
 		s = PyObject_Repr(key);
-		PyString_Concat(&s, colon);
-		PyString_ConcatAndDel(&s, PyObject_Repr(value));
+		PyUnicode_Append(&s, colon);
+		PyUnicode_AppendAndDel(&s, PyObject_Repr(value));
 		Py_DECREF(value);
 		if (s == NULL)
 			goto Done;
@@ -978,29 +978,29 @@ dict_repr(dictobject *mp)
 
 	/* Add "{}" decorations to the first and last items. */
 	assert(PyList_GET_SIZE(pieces) > 0);
-	s = PyString_FromString("{");
+	s = PyUnicode_FromString("{");
 	if (s == NULL)
 		goto Done;
 	temp = PyList_GET_ITEM(pieces, 0);
-	PyString_ConcatAndDel(&s, temp);
+	PyUnicode_AppendAndDel(&s, temp);
 	PyList_SET_ITEM(pieces, 0, s);
 	if (s == NULL)
 		goto Done;
 
-	s = PyString_FromString("}");
+	s = PyUnicode_FromString("}");
 	if (s == NULL)
 		goto Done;
 	temp = PyList_GET_ITEM(pieces, PyList_GET_SIZE(pieces) - 1);
-	PyString_ConcatAndDel(&temp, s);
+	PyUnicode_AppendAndDel(&temp, s);
 	PyList_SET_ITEM(pieces, PyList_GET_SIZE(pieces) - 1, temp);
 	if (temp == NULL)
 		goto Done;
 
 	/* Paste them all together with ", " between. */
-	s = PyString_FromString(", ");
+	s = PyUnicode_FromString(", ");
 	if (s == NULL)
 		goto Done;
-	result = _PyString_Join(s, pieces);
+	result = PyUnicode_Join(s, pieces);
 	Py_DECREF(s);
 
 Done:
diff --git a/Objects/exceptions.c b/Objects/exceptions.c
index 36e3795..f4c265a 100644
--- a/Objects/exceptions.c
+++ b/Objects/exceptions.c
@@ -111,13 +111,13 @@ BaseException_repr(PyBaseExceptionObject *self)
     dot = strrchr(name, '.');
     if (dot != NULL) name = dot+1;
 
-    repr = PyString_FromString(name);
+    repr = PyUnicode_FromString(name);
     if (!repr) {
         Py_DECREF(repr_suffix);
         return NULL;
     }
 
-    PyString_ConcatAndDel(&repr, repr_suffix);
+    PyUnicode_AppendAndDel(&repr, repr_suffix);
     return repr;
 }
 
@@ -529,7 +529,7 @@ EnvironmentError_str(PyEnvironmentErrorObject *self)
         if (!fmt)
             return NULL;
 
-        repr = PyObject_Repr(self->filename);
+        repr = PyObject_ReprStr8(self->filename);
         if (!repr) {
             Py_DECREF(fmt);
             return NULL;
@@ -760,7 +760,7 @@ WindowsError_str(PyWindowsErrorObject *self)
         if (!fmt)
             return NULL;
 
-        repr = PyObject_Repr(self->filename);
+        repr = PyObject_ReprStr8(self->filename);
         if (!repr) {
             Py_DECREF(fmt);
             return NULL;
@@ -1134,7 +1134,7 @@ KeyError_str(PyBaseExceptionObject *self)
        If args is anything else, use the default BaseException__str__().
     */
     if (PyTuple_GET_SIZE(self->args) == 1) {
-        return PyObject_Repr(PyTuple_GET_ITEM(self->args, 0));
+        return PyObject_ReprStr8(PyTuple_GET_ITEM(self->args, 0));
     }
     return BaseException_str(self);
 }
diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index e195450..7c8e2b2 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -406,7 +406,7 @@ file_repr(PyFileObject *f)
 		PyObject *ret = NULL;
 		PyObject *name = PyUnicode_AsUnicodeEscapeString(f->f_name);
 		const char *name_str = name ? PyString_AsString(name) : "?";
-		ret = PyString_FromFormat("<%s file u'%s', mode '%s' at %p>",
+		ret = PyUnicode_FromFormat("<%s file u'%s', mode '%s' at %p>",
 				   f->f_fp == NULL ? "closed" : "open",
 				   name_str,
 				   PyString_AsString(f->f_mode),
@@ -414,7 +414,7 @@ file_repr(PyFileObject *f)
 		Py_XDECREF(name);
 		return ret;
 	} else {
-		return PyString_FromFormat("<%s file '%s', mode '%s' at %p>",
+		return PyUnicode_FromFormat("<%s file '%s', mode '%s' at %p>",
 				   f->f_fp == NULL ? "closed" : "open",
 				   PyString_AsString(f->f_name),
 				   PyString_AsString(f->f_mode),
@@ -2142,7 +2142,7 @@ PyFile_WriteObject(PyObject *v, PyObject *f, int flags)
                         value = PyObject_Str(v);
 	}
         else
-		value = PyObject_Repr(v);
+		value = PyObject_ReprStr8(v);
 	if (value == NULL) {
 		Py_DECREF(writer);
 		return -1;
diff --git a/Objects/floatobject.c b/Objects/floatobject.c
index fc6bedf..679e93e 100644
--- a/Objects/floatobject.c
+++ b/Objects/floatobject.c
@@ -302,7 +302,7 @@ float_repr(PyFloatObject *v)
 {
 	char buf[100];
 	format_float(buf, sizeof(buf), v, PREC_REPR);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static PyObject *
diff --git a/Objects/funcobject.c b/Objects/funcobject.c
index 0069fc1..6f17e7a 100644
--- a/Objects/funcobject.c
+++ b/Objects/funcobject.c
@@ -574,7 +574,7 @@ func_dealloc(PyFunctionObject *op)
 static PyObject*
 func_repr(PyFunctionObject *op)
 {
-	return PyString_FromFormat("<function %s at %p>",
+	return PyUnicode_FromFormat("<function %s at %p>",
 				   PyString_AsString(op->func_name),
 				   op);
 }
diff --git a/Objects/intobject.c b/Objects/intobject.c
index 5556c20..6c9745a 100644
--- a/Objects/intobject.c
+++ b/Objects/intobject.c
@@ -369,7 +369,7 @@ PyInt_FromString(char *s, char **pend, int base)
 		sobj = PyString_FromStringAndSize(s, slen);
 		if (sobj == NULL)
 			return NULL;
-		srepr = PyObject_Repr(sobj);
+		srepr = PyObject_ReprStr8(sobj);
 		Py_DECREF(sobj);
 		if (srepr == NULL)
 			return NULL;
@@ -433,7 +433,7 @@ int_repr(PyIntObject *v)
 {
 	char buf[64];
 	PyOS_snprintf(buf, sizeof(buf), "%ld", v->ob_ival);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static int
@@ -972,7 +972,7 @@ int_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 			/* create a repr() of the input string,
 			 * just like PyInt_FromString does */
 			PyObject *srepr;
-			srepr = PyObject_Repr(x);
+			srepr = PyObject_ReprStr8(x);
 			if (srepr == NULL)
 				return NULL;
 			PyErr_Format(PyExc_ValueError,
diff --git a/Objects/listobject.c b/Objects/listobject.c
index 0cb1a85..0180e89 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -308,11 +308,11 @@ list_repr(PyListObject *v)
 
 	i = Py_ReprEnter((PyObject*)v);
 	if (i != 0) {
-		return i > 0 ? PyString_FromString("[...]") : NULL;
+		return i > 0 ? PyUnicode_FromString("[...]") : NULL;
 	}
 
 	if (v->ob_size == 0) {
-		result = PyString_FromString("[]");
+		result = PyUnicode_FromString("[]");
 		goto Done;
 	}
 
@@ -335,29 +335,29 @@ list_repr(PyListObject *v)
 
 	/* Add "[]" decorations to the first and last items. */
 	assert(PyList_GET_SIZE(pieces) > 0);
-	s = PyString_FromString("[");
+	s = PyUnicode_FromString("[");
 	if (s == NULL)
 		goto Done;
 	temp = PyList_GET_ITEM(pieces, 0);
-	PyString_ConcatAndDel(&s, temp);
+	PyUnicode_AppendAndDel(&s, temp);
 	PyList_SET_ITEM(pieces, 0, s);
 	if (s == NULL)
 		goto Done;
 
-	s = PyString_FromString("]");
+	s = PyUnicode_FromString("]");
 	if (s == NULL)
 		goto Done;
 	temp = PyList_GET_ITEM(pieces, PyList_GET_SIZE(pieces) - 1);
-	PyString_ConcatAndDel(&temp, s);
+	PyUnicode_AppendAndDel(&temp, s);
 	PyList_SET_ITEM(pieces, PyList_GET_SIZE(pieces) - 1, temp);
 	if (temp == NULL)
 		goto Done;
 
 	/* Paste them all together with ", " between. */
-	s = PyString_FromString(", ");
+	s = PyUnicode_FromString(", ");
 	if (s == NULL)
 		goto Done;
-	result = _PyString_Join(s, pieces);
+	result = PyUnicode_Join(s, pieces);
 	Py_DECREF(s);
 
 Done:
diff --git a/Objects/longobject.c b/Objects/longobject.c
index 61e5bed..d325b8e 100644
--- a/Objects/longobject.c
+++ b/Objects/longobject.c
@@ -1430,10 +1430,10 @@ static PyObject *
 long_format(PyObject *aa, int base)
 {
 	register PyLongObject *a = (PyLongObject *)aa;
-	PyStringObject *str;
+	PyObject *str;
 	Py_ssize_t i, j, sz;
 	Py_ssize_t size_a;
-	char *p;
+	Py_UNICODE *p;
 	int bits;
 	char sign = '\0';
 
@@ -1459,10 +1459,10 @@ long_format(PyObject *aa, int base)
 				"int is too large to format");
 		return NULL;
 	}
-	str = (PyStringObject *) PyString_FromStringAndSize((char *)0, sz);
+	str = PyUnicode_FromUnicode(NULL, sz);
 	if (str == NULL)
 		return NULL;
-	p = PyString_AS_STRING(str) + sz;
+	p = PyUnicode_AS_UNICODE(str) + sz;
 	*p = '\0';
 	if (a->ob_size < 0)
 		sign = '-';
@@ -1486,7 +1486,7 @@ long_format(PyObject *aa, int base)
 			do {
 				char cdigit = (char)(accum & (base - 1));
 				cdigit += (cdigit < 10) ? '0' : 'a'-10;
-				assert(p > PyString_AS_STRING(str));
+				assert(p > PyUnicode_AS_UNICODE(str));
 				*--p = cdigit;
 				accumbits -= basebits;
 				accum >>= basebits;
@@ -1538,7 +1538,7 @@ long_format(PyObject *aa, int base)
 			do {
 				digit nextrem = (digit)(rem / base);
 				char c = (char)(rem - nextrem * base);
-				assert(p > PyString_AS_STRING(str));
+				assert(p > PyUnicode_AS_UNICODE(str));
 				c += (c < 10) ? '0' : 'a'-10;
 				*--p = c;
 				rem = nextrem;
@@ -1567,14 +1567,16 @@ long_format(PyObject *aa, int base)
 	}
 	if (sign)
 		*--p = sign;
-	if (p != PyString_AS_STRING(str)) {
-		char *q = PyString_AS_STRING(str);
+	if (p != PyUnicode_AS_UNICODE(str)) {
+		Py_UNICODE *q = PyUnicode_AS_UNICODE(str);
 		assert(p > q);
 		do {
 		} while ((*q++ = *p++) != '\0');
 		q--;
-		_PyString_Resize((PyObject **)&str,
-				 (Py_ssize_t) (q - PyString_AS_STRING(str)));
+		if (PyUnicode_Resize(&str, (Py_ssize_t) (q - PyUnicode_AS_UNICODE(str)))) {
+			Py_DECREF(str);
+			return NULL;
+		}
 	}
 	return (PyObject *)str;
 }
@@ -1928,7 +1930,7 @@ digit beyond the first.
 	strobj = PyString_FromStringAndSize(orig_str, slen);
 	if (strobj == NULL)
 		return NULL;
-	strrepr = PyObject_Repr(strobj);
+	strrepr = PyObject_ReprStr8(strobj);
 	Py_DECREF(strobj);
 	if (strrepr == NULL)
 		return NULL;
@@ -3525,7 +3527,7 @@ long_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 			/* create a repr() of the input string,
 			 * just like PyLong_FromString does. */
 			PyObject *srepr;
-			srepr = PyObject_Repr(x);
+			srepr = PyObject_ReprStr8(x);
 			if (srepr == NULL)
 				return NULL;
 			PyErr_Format(PyExc_ValueError,
diff --git a/Objects/methodobject.c b/Objects/methodobject.c
index 4204db7..6199805 100644
--- a/Objects/methodobject.c
+++ b/Objects/methodobject.c
@@ -184,9 +184,9 @@ static PyObject *
 meth_repr(PyCFunctionObject *m)
 {
 	if (m->m_self == NULL)
-		return PyString_FromFormat("<built-in function %s>",
+		return PyUnicode_FromFormat("<built-in function %s>",
 					   m->m_ml->ml_name);
-	return PyString_FromFormat("<built-in method %s of %s object at %p>",
+	return PyUnicode_FromFormat("<built-in method %s of %s object at %p>",
 				   m->m_ml->ml_name,
 				   m->m_self->ob_type->tp_name,
 				   m->m_self);
diff --git a/Objects/moduleobject.c b/Objects/moduleobject.c
index f188515..daf24eb 100644
--- a/Objects/moduleobject.c
+++ b/Objects/moduleobject.c
@@ -198,9 +198,9 @@ module_repr(PyModuleObject *m)
 	filename = PyModule_GetFilename((PyObject *)m);
 	if (filename == NULL) {
 		PyErr_Clear();
-		return PyString_FromFormat("<module '%s' (built-in)>", name);
+		return PyUnicode_FromFormat("<module '%s' (built-in)>", name);
 	}
-	return PyString_FromFormat("<module '%s' from '%s'>", name, filename);
+	return PyUnicode_FromFormat("<module '%s' from '%s'>", name, filename);
 }
 
 /* We only need a traverse function, no clear function: If the module
diff --git a/Objects/object.c b/Objects/object.c
index 4b210f1..be7d501 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -284,7 +284,7 @@ internal_print(PyObject *op, FILE *fp, int flags, int nesting)
 			if (flags & Py_PRINT_RAW)
 				s = PyObject_Str(op);
 			else
-				s = PyObject_Repr(op);
+				s = PyObject_ReprStr8(op);
 			if (s == NULL)
 				ret = -1;
 			else {
@@ -343,6 +343,7 @@ _PyObject_Dump(PyObject* op)
 PyObject *
 PyObject_Repr(PyObject *v)
 {
+	PyObject *ress, *resu;
 	if (PyErr_CheckSignals())
 		return NULL;
 #ifdef USE_STACKCHECK
@@ -352,29 +353,48 @@ PyObject_Repr(PyObject *v)
 	}
 #endif
 	if (v == NULL)
-		return PyString_FromString("<NULL>");
+		return PyUnicode_FromString("<NULL>");
 	else if (v->ob_type->tp_repr == NULL)
-		return PyString_FromFormat("<%s object at %p>",
-					   v->ob_type->tp_name, v);
+		return PyUnicode_FromFormat("<%s object at %p>", v->ob_type->tp_name, v);
 	else {
-		PyObject *res;
-		res = (*v->ob_type->tp_repr)(v);
-		if (res == NULL)
+		ress = (*v->ob_type->tp_repr)(v);
+		if (!ress)
 			return NULL;
-		if (PyUnicode_Check(res))
-			return res;
-		if (!PyString_Check(res)) {
+		if (PyUnicode_Check(ress))
+			return ress;
+		if (!PyString_Check(ress)) {
 			PyErr_Format(PyExc_TypeError,
 				     "__repr__ returned non-string (type %.200s)",
-				     res->ob_type->tp_name);
-			Py_DECREF(res);
+				     ress->ob_type->tp_name);
+			Py_DECREF(ress);
 			return NULL;
 		}
-		return res;
+		resu = PyUnicode_FromObject(ress);
+		Py_DECREF(ress);
+		return resu;
 	}
 }
 
 PyObject *
+PyObject_ReprStr8(PyObject *v)
+{
+	PyObject *resu = PyObject_Repr(v);
+	if (resu) {
+		PyObject *resb = PyUnicode_AsEncodedString(resu, NULL, NULL);
+		Py_DECREF(resu);
+		if (resb) {
+			PyObject *ress = PyString_FromStringAndSize(
+				PyBytes_AS_STRING(resb),
+				PyBytes_GET_SIZE(resb)
+			);
+			Py_DECREF(resb);
+			return ress;
+		}
+	}
+	return NULL;
+}
+
+PyObject *
 _PyObject_Str(PyObject *v)
 {
 	PyObject *res;
@@ -1509,7 +1529,7 @@ so there is exactly one (which is indestructible, by the way).
 static PyObject *
 none_repr(PyObject *op)
 {
-	return PyString_FromString("None");
+	return PyUnicode_FromString("None");
 }
 
 /* ARGUSED */
@@ -1551,7 +1571,7 @@ PyObject _Py_NoneStruct = {
 static PyObject *
 NotImplemented_repr(PyObject *op)
 {
-	return PyString_FromString("NotImplemented");
+	return PyUnicode_FromString("NotImplemented");
 }
 
 static PyTypeObject PyNotImplemented_Type = {
diff --git a/Objects/rangeobject.c b/Objects/rangeobject.c
index 8d71a90..c5355df 100644
--- a/Objects/rangeobject.c
+++ b/Objects/rangeobject.c
@@ -261,19 +261,19 @@ range_repr(rangeobject *r)
     }
 
     if (istart == 0 && istep == 1)
-        result = PyString_FromFormat("range(%s)",
-                                     PyString_AS_STRING(stop_str));
+        result = PyUnicode_FromFormat("range(%s)",
+                                      PyString_AS_STRING(stop_str));
     else if (istep == 1) {
         if (start_str)
-            result = PyString_FromFormat("range(%s, %s)",
-                                         PyString_AS_STRING(start_str),
-                                         PyString_AS_STRING(stop_str));
+            result = PyUnicode_FromFormat("range(%s, %s)",
+                                          PyString_AS_STRING(start_str),
+                                          PyString_AS_STRING(stop_str));
     }
     else if (start_str && step_str)
-        result = PyString_FromFormat("range(%s, %s, %s)",
-                                     PyString_AS_STRING(start_str),
-                                     PyString_AS_STRING(stop_str),
-                                     PyString_AS_STRING(step_str));
+        result = PyUnicode_FromFormat("range(%s, %s, %s)",
+                                      PyString_AS_STRING(start_str),
+                                      PyString_AS_STRING(stop_str),
+                                      PyString_AS_STRING(step_str));
     /* else result is NULL and an error should already be set. */
 
     Py_XDECREF(start_str);
diff --git a/Objects/setobject.c b/Objects/setobject.c
index 91f44d5..795efc5 100644
--- a/Objects/setobject.c
+++ b/Objects/setobject.c
@@ -613,18 +613,21 @@ static PyObject *
 set_repr(PySetObject *so)
 {
 	PyObject *keys, *result=NULL, *listrepr;
+	int newsize;
+	Py_UNICODE *u;
+	const char *s;
 	int status = Py_ReprEnter((PyObject*)so);
 
 	if (status != 0) {
 		if (status < 0)
 			return NULL;
-		return PyString_FromFormat("%s(...)", so->ob_type->tp_name);
+		return PyUnicode_FromFormat("%s(...)", so->ob_type->tp_name);
 	}
 
 	/* shortcut for the empty set */
 	if (!so->used) {
 		Py_ReprLeave((PyObject*)so);
-		return PyString_FromFormat("%s()", so->ob_type->tp_name);
+		return PyUnicode_FromFormat("%s()", so->ob_type->tp_name);
 	}
 
 	keys = PySequence_List((PyObject *)so);
@@ -635,14 +638,28 @@ set_repr(PySetObject *so)
 	if (listrepr == NULL)
 		goto done;
 
-	if (so->ob_type == &PySet_Type) {
-		char *s = PyString_AS_STRING(listrepr);
-		s += 1;
-		s[strlen(s)-1] = 0;
-		result = PyString_FromFormat("{%s}", s);
-	} else {
-		result = PyString_FromFormat("%s(%s)", so->ob_type->tp_name,
-			 	PyString_AS_STRING(listrepr));
+	newsize = PyUnicode_GET_SIZE(listrepr);
+	if (so->ob_type != &PySet_Type)
+		newsize += strlen(so->ob_type->tp_name)+2;
+	result = PyUnicode_FromUnicode(NULL, newsize);
+	if (result) {
+		u = PyUnicode_AS_UNICODE(result);
+		if (so->ob_type != &PySet_Type) {
+			for (s = so->ob_type->tp_name; *s;)
+				*u++ = *s++;
+			*u++ = '(';
+			Py_UNICODE_COPY(u, PyUnicode_AS_UNICODE(listrepr),
+									 PyUnicode_GET_SIZE(listrepr));
+			u += PyUnicode_GET_SIZE(listrepr);
+			*u++ = ')';
+		} else {
+			*u++ = '{';
+			/* Omit the brackets from the listrepr */
+			Py_UNICODE_COPY(u, PyUnicode_AS_UNICODE(listrepr)+1,
+									 PyUnicode_GET_SIZE(listrepr)-2);
+			u += PyUnicode_GET_SIZE(listrepr)-2;
+			*u++ = '}';
+		}
 	}
 	Py_DECREF(listrepr);
 done:
diff --git a/Objects/sliceobject.c b/Objects/sliceobject.c
index d56d69b..d526a07 100644
--- a/Objects/sliceobject.c
+++ b/Objects/sliceobject.c
@@ -19,7 +19,7 @@ this type and there is exactly one in existence.
 static PyObject *
 ellipsis_repr(PyObject *op)
 {
-	return PyString_FromString("Ellipsis");
+	return PyUnicode_FromString("Ellipsis");
 }
 
 static PyTypeObject PyEllipsis_Type = {
@@ -228,14 +228,14 @@ slice_repr(PySliceObject *r)
 {
 	PyObject *s, *comma;
 
-	s = PyString_FromString("slice(");
-	comma = PyString_FromString(", ");
-	PyString_ConcatAndDel(&s, PyObject_Repr(r->start));
-	PyString_Concat(&s, comma);
-	PyString_ConcatAndDel(&s, PyObject_Repr(r->stop));
-	PyString_Concat(&s, comma);
-	PyString_ConcatAndDel(&s, PyObject_Repr(r->step));
-	PyString_ConcatAndDel(&s, PyString_FromString(")"));
+	s = PyUnicode_FromString("slice(");
+	comma = PyUnicode_FromString(", ");
+	PyUnicode_AppendAndDel(&s, PyObject_Repr(r->start));
+	PyUnicode_Append(&s, comma);
+	PyUnicode_AppendAndDel(&s, PyObject_Repr(r->stop));
+	PyUnicode_Append(&s, comma);
+	PyUnicode_AppendAndDel(&s, PyObject_Repr(r->step));
+	PyUnicode_AppendAndDel(&s, PyUnicode_FromString(")"));
 	Py_DECREF(comma);
 	return s;
 }
diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index 4fbb1a9..98fb0bd 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -822,36 +822,46 @@ string_print(PyStringObject *op, FILE *fp, int flags)
 PyObject *
 PyString_Repr(PyObject *obj, int smartquotes)
 {
+	static const char *hexdigits = "0123456789abcdef";
 	register PyStringObject* op = (PyStringObject*) obj;
+	Py_ssize_t length = PyUnicode_GET_SIZE(op);
 	size_t newsize = 2 + 4 * op->ob_size;
 	PyObject *v;
 	if (newsize > PY_SSIZE_T_MAX || newsize / 4 != op->ob_size) {
 		PyErr_SetString(PyExc_OverflowError,
 			"string is too large to make repr");
 	}
-	v = PyString_FromStringAndSize((char *)NULL, newsize);
+	v = PyUnicode_FromUnicode(NULL, newsize);
 	if (v == NULL) {
 		return NULL;
 	}
 	else {
 		register Py_ssize_t i;
-		register char c;
-		register char *p;
+		register Py_UNICODE c;
+		register Py_UNICODE *p = PyUnicode_AS_UNICODE(v);
 		int quote;
 
 		/* figure out which quote to use; single is preferred */
 		quote = '\'';
-		if (smartquotes &&
-		    memchr(op->ob_sval, '\'', op->ob_size) &&
-		    !memchr(op->ob_sval, '"', op->ob_size))
-			quote = '"';
+		if (smartquotes) {
+			Py_UNICODE *test;
+			for (test = p; test < p+length; ++test) {
+				if (*test == '"') {
+					quote = '\''; /* switch back to single quote */
+					goto decided;
+				}
+				else if (*test == '\'')
+					quote = '"';
+			}
+			decided:
+			;
+		}
 
-		p = PyString_AS_STRING(v);
 		*p++ = quote;
 		for (i = 0; i < op->ob_size; i++) {
 			/* There's at least enough room for a hex escape
 			   and a closing quote. */
-			assert(newsize - (p - PyString_AS_STRING(v)) >= 5);
+			assert(newsize - (p - PyUnicode_AS_UNICODE(v)) >= 5);
 			c = op->ob_sval[i];
 			if (c == quote || c == '\\')
 				*p++ = '\\', *p++ = c;
@@ -862,20 +872,21 @@ PyString_Repr(PyObject *obj, int smartquotes)
 			else if (c == '\r')
 				*p++ = '\\', *p++ = 'r';
 			else if (c < ' ' || c >= 0x7f) {
-				/* For performance, we don't want to call
-				   PyOS_snprintf here (extra layers of
-				   function call). */
-				sprintf(p, "\\x%02x", c & 0xff);
-                                p += 4;
+				*p++ = '\\';
+				*p++ = 'x';
+				*p++ = hexdigits[(c & 0xf0) >> 4];
+				*p++ = hexdigits[c & 0xf];
 			}
 			else
 				*p++ = c;
 		}
-		assert(newsize - (p - PyString_AS_STRING(v)) >= 1);
+		assert(newsize - (p - PyUnicode_AS_UNICODE(v)) >= 1);
 		*p++ = quote;
 		*p = '\0';
-		_PyString_Resize(
-			&v, (p - PyString_AS_STRING(v)));
+		if (PyUnicode_Resize(&v, (p - PyUnicode_AS_UNICODE(v)))) {
+			Py_DECREF(v);
+			return NULL;
+		}
 		return v;
 	}
 }
@@ -4613,7 +4624,7 @@ PyString_Format(PyObject *format, PyObject *args)
 				/* Fall through */
 			case 'r':
 				if (c == 'r')
-					temp = PyObject_Repr(v);
+					temp = PyObject_ReprStr8(v);
 				if (temp == NULL)
 					goto error;
 				if (!PyString_Check(temp)) {
diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index dacc3ee..fb5c246 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -210,7 +210,7 @@ tuplerepr(PyTupleObject *v)
 
 	n = v->ob_size;
 	if (n == 0)
-		return PyString_FromString("()");
+		return PyUnicode_FromString("()");
 
 	pieces = PyTuple_New(n);
 	if (pieces == NULL)
@@ -226,29 +226,29 @@ tuplerepr(PyTupleObject *v)
 
 	/* Add "()" decorations to the first and last items. */
 	assert(n > 0);
-	s = PyString_FromString("(");
+	s = PyUnicode_FromString("(");
 	if (s == NULL)
 		goto Done;
 	temp = PyTuple_GET_ITEM(pieces, 0);
-	PyString_ConcatAndDel(&s, temp);
+	PyUnicode_AppendAndDel(&s, temp);
 	PyTuple_SET_ITEM(pieces, 0, s);
 	if (s == NULL)
 		goto Done;
 
-	s = PyString_FromString(n == 1 ? ",)" : ")");
+	s = PyUnicode_FromString(n == 1 ? ",)" : ")");
 	if (s == NULL)
 		goto Done;
 	temp = PyTuple_GET_ITEM(pieces, n-1);
-	PyString_ConcatAndDel(&temp, s);
+	PyUnicode_AppendAndDel(&temp, s);
 	PyTuple_SET_ITEM(pieces, n-1, temp);
 	if (temp == NULL)
 		goto Done;
 
 	/* Paste them all together with ", " between. */
-	s = PyString_FromString(", ");
+	s = PyUnicode_FromString(", ");
 	if (s == NULL)
 		goto Done;
-	result = _PyString_Join(s, pieces);
+	result = PyUnicode_Join(s, pieces);
 	Py_DECREF(s);	
 
 Done:
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index f6ae69b..bc8f9bd 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -385,13 +385,13 @@ type_repr(PyTypeObject *type)
 		kind = "type";
 
 	if (mod != NULL && strcmp(PyString_AS_STRING(mod), "__builtin__")) {
-		rtn = PyString_FromFormat("<%s '%s.%s'>",
+		rtn = PyUnicode_FromFormat("<%s '%s.%s'>",
 					  kind,
 					  PyString_AS_STRING(mod),
 					  PyString_AS_STRING(name));
 	}
 	else
-		rtn = PyString_FromFormat("<%s '%s'>", kind, type->tp_name);
+		rtn = PyUnicode_FromFormat("<%s '%s'>", kind, type->tp_name);
 
 	Py_XDECREF(mod);
 	Py_DECREF(name);
@@ -1006,7 +1006,7 @@ class_name(PyObject *cls)
 	if (name == NULL) {
 		PyErr_Clear();
 		Py_XDECREF(name);
-		name = PyObject_Repr(cls);
+		name = PyObject_ReprStr8(cls);
 	}
 	if (name == NULL)
 		return NULL;
@@ -2481,12 +2481,12 @@ object_repr(PyObject *self)
 	if (name == NULL)
 		return NULL;
 	if (mod != NULL && strcmp(PyString_AS_STRING(mod), "__builtin__"))
-		rtn = PyString_FromFormat("<%s.%s object at %p>",
+		rtn = PyUnicode_FromFormat("<%s.%s object at %p>",
 					  PyString_AS_STRING(mod),
 					  PyString_AS_STRING(name),
 					  self);
 	else
-		rtn = PyString_FromFormat("<%s object at %p>",
+		rtn = PyUnicode_FromFormat("<%s object at %p>",
 					  type->tp_name, self);
 	Py_XDECREF(mod);
 	Py_DECREF(name);
@@ -4645,7 +4645,7 @@ slot_tp_repr(PyObject *self)
 		return res;
 	}
 	PyErr_Clear();
-	return PyString_FromFormat("<%s object at %p>",
+	return PyUnicode_FromFormat("<%s object at %p>",
 				   self->ob_type->tp_name, self);
 }
 
@@ -4662,8 +4662,14 @@ slot_tp_str(PyObject *self)
 		return res;
 	}
 	else {
+		PyObject *ress;
 		PyErr_Clear();
-		return slot_tp_repr(self);
+		res = slot_tp_repr(self);
+		if (!res)
+			return NULL;
+		ress = _PyUnicode_AsDefaultEncodedString(res, NULL);
+		Py_DECREF(res);
+		return ress;
 	}
 }
 
@@ -5692,12 +5698,12 @@ super_repr(PyObject *self)
 	superobject *su = (superobject *)self;
 
 	if (su->obj_type)
-		return PyString_FromFormat(
+		return PyUnicode_FromFormat(
 			"<super: <class '%s'>, <%s object>>",
 			su->type ? su->type->tp_name : "NULL",
 			su->obj_type->tp_name);
 	else
-		return PyString_FromFormat(
+		return PyUnicode_FromFormat(
 			"<super: <class '%s'>, NULL>",
 			su->type ? su->type->tp_name : "NULL");
 }
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index e77b65d..b46093e 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -5854,6 +5854,29 @@ onError:
     return NULL;
 }
 
+void
+PyUnicode_Append(PyObject **pleft, PyObject *right)
+{
+	PyObject *new;
+	if (*pleft == NULL)
+		return;
+	if (right == NULL || !PyUnicode_Check(*pleft)) {
+		Py_DECREF(*pleft);
+		*pleft = NULL;
+		return;
+	}
+	new = PyUnicode_Concat(*pleft, right);
+	Py_DECREF(*pleft);
+	*pleft = new;
+}
+
+void
+PyUnicode_AppendAndDel(PyObject **pleft, PyObject *right)
+{
+	PyUnicode_Append(pleft, right);
+	Py_XDECREF(right);
+}
+
 PyDoc_STRVAR(count__doc__,
 "S.count(sub[, start[, end]]) -> int\n\
 \n\
@@ -6749,7 +6772,7 @@ static
 PyObject *unicode_repr(PyObject *unicode)
 {
     PyObject *repr;
-    char *p;
+    Py_UNICODE *p;
     Py_UNICODE *s = PyUnicode_AS_UNICODE(unicode);
     Py_ssize_t size = PyUnicode_GET_SIZE(unicode);
 
@@ -6771,7 +6794,7 @@ PyObject *unicode_repr(PyObject *unicode)
        escape.
     */
 
-    repr = PyString_FromStringAndSize(NULL,
+    repr = PyUnicode_FromUnicode(NULL,
         2 /* quotes */
 #ifdef Py_UNICODE_WIDE
         + 10*size
@@ -6782,7 +6805,7 @@ PyObject *unicode_repr(PyObject *unicode)
     if (repr == NULL)
         return NULL;
 
-    p = PyString_AS_STRING(repr);
+    p = PyUnicode_AS_UNICODE(repr);
 
     /* Add quote */
     *p++ = (findchar(s, size, '\'') &&
@@ -6791,9 +6814,9 @@ PyObject *unicode_repr(PyObject *unicode)
         Py_UNICODE ch = *s++;
 
         /* Escape quotes and backslashes */
-        if ((ch == (Py_UNICODE) PyString_AS_STRING(repr)[0]) || (ch == '\\')) {
+        if ((ch == PyUnicode_AS_UNICODE(repr)[0]) || (ch == '\\')) {
             *p++ = '\\';
-            *p++ = (char) ch;
+            *p++ = ch;
             continue;
         }
 
@@ -6877,10 +6900,10 @@ PyObject *unicode_repr(PyObject *unicode)
             *p++ = (char) ch;
     }
     /* Add quote */
-    *p++ = PyString_AS_STRING(repr)[0];
+    *p++ = PyUnicode_AS_UNICODE(repr)[0];
 
     *p = '\0';
-    _PyString_Resize(&repr, p - PyString_AS_STRING(repr));
+    _PyUnicode_Resize(&repr, p - PyUnicode_AS_UNICODE(repr));
     return repr;
 }
 
diff --git a/Objects/weakrefobject.c b/Objects/weakrefobject.c
index 7b5b561..d30b90f 100644
--- a/Objects/weakrefobject.c
+++ b/Objects/weakrefobject.c
@@ -177,7 +177,7 @@ weakref_repr(PyWeakReference *self)
 		      name);
 	Py_XDECREF(nameobj);
     }
-    return PyString_FromString(buffer);
+    return PyUnicode_FromString(buffer);
 }
 
 /* Weak references only support equality, not ordering. Two weak references
@@ -451,7 +451,7 @@ proxy_repr(PyWeakReference *proxy)
 		  "<weakproxy at %p to %.100s at %p>", proxy,
 		  PyWeakref_GET_OBJECT(proxy)->ob_type->tp_name,
 		  PyWeakref_GET_OBJECT(proxy));
-    return PyString_FromString(buf);
+    return PyUnicode_FromString(buf);
 }
 
 
diff --git a/Python/errors.c b/Python/errors.c
index 443235a..4ef491f 100644
--- a/Python/errors.c
+++ b/Python/errors.c
@@ -54,7 +54,7 @@ PyErr_SetObject(PyObject *exception, PyObject *value)
 {
 	if (exception != NULL &&
 	    !PyExceptionClass_Check(exception)) {
-		PyObject *excstr = PyObject_Repr(exception);
+		PyObject *excstr = PyObject_ReprStr8(exception);
 		PyErr_Format(PyExc_SystemError,
 			     "exception %s not a BaseException subclass",
 			     PyString_AS_STRING(excstr));
diff --git a/Python/symtable.c b/Python/symtable.c
index 89c7914..58f673e 100644
--- a/Python/symtable.c
+++ b/Python/symtable.c
@@ -94,7 +94,7 @@ ste_repr(PySTEntryObject *ste)
 		      "<symtable entry %.100s(%ld), line %d>",
 		      PyString_AS_STRING(ste->ste_name),
 		      PyInt_AS_LONG(ste->ste_id), ste->ste_lineno);
-	return PyString_FromString(buf);
+	return PyUnicode_FromString(buf);
 }
 
 static void