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unicodeobject.c
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unicodeobject.c
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/*
Unicode implementation based on original code by Fredrik Lundh,
modified by Marc-Andre Lemburg <[email protected]> according to the
Unicode Integration Proposal (see file Misc/unicode.txt).
Copyright (c) Corporation for National Research Initiatives.
Original header:
--------------------------------------------------------------------
* Yet another Unicode string type for Python. This type supports the
* 16-bit Basic Multilingual Plane (BMP) only.
*
* Note that this string class supports embedded NULL characters. End
* of string is given by the length attribute. However, the internal
* representation always stores a trailing NULL to make it easier to
* use unicode strings with standard APIs.
*
* History:
* 1999-01-23 fl Created
* 1999-01-24 fl Added split, join, capwords; basic UTF-8 support
* 1999-01-24 fl Basic UCS-2 support, buffer interface, etc.
* 1999-03-06 fl Moved declarations to separate file, etc.
* 1999-06-13 fl Changed join method semantics according to Tim's proposal
* 1999-08-10 fl Some minor tweaks
*
* Written by Fredrik Lundh, January 1999.
*
* Copyright (c) 1999 by Secret Labs AB.
* Copyright (c) 1999 by Fredrik Lundh.
*
* http://www.pythonware.com
*
* --------------------------------------------------------------------
* This Unicode String Type is
*
* Copyright (c) 1999 by Secret Labs AB
* Copyright (c) 1999 by Fredrik Lundh
*
* By obtaining, using, and/or copying this software and/or its
* associated documentation, you agree that you have read, understood,
* and will comply with the following terms and conditions:
*
* Permission to use, copy, modify, and distribute this software and its
* associated documentation for any purpose and without fee is hereby
* granted, provided that the above copyright notice appears in all
* copies, and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of Secret Labs
* AB or the author not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission.
*
* SECRET LABS AB AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS. IN NO EVENT SHALL SECRET LABS AB OR THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
* -------------------------------------------------------------------- */
#include "Python.h"
#include "unicodeobject.h"
#include "ucnhash.h"
#ifdef MS_WIN32
#include <windows.h>
#endif
/* Limit for the Unicode object free list */
#define MAX_UNICODE_FREELIST_SIZE 1024
/* Limit for the Unicode object free list stay alive optimization.
The implementation will keep allocated Unicode memory intact for
all objects on the free list having a size less than this
limit. This reduces malloc() overhead for small Unicode objects.
At worst this will result in MAX_UNICODE_FREELIST_SIZE *
(sizeof(PyUnicodeObject) + KEEPALIVE_SIZE_LIMIT +
malloc()-overhead) bytes of unused garbage.
Setting the limit to 0 effectively turns the feature off.
Note: This is an experimental feature ! If you get core dumps when
using Unicode objects, turn this feature off.
*/
#define KEEPALIVE_SIZE_LIMIT 9
/* Endianness switches; defaults to little endian */
#ifdef WORDS_BIGENDIAN
# define BYTEORDER_IS_BIG_ENDIAN
#else
# define BYTEORDER_IS_LITTLE_ENDIAN
#endif
/* --- Globals ------------------------------------------------------------
The globals are initialized by the _PyUnicode_Init() API and should
not be used before calling that API.
*/
/* The empty Unicode object */
static PyUnicodeObject *unicode_empty;
/* Free list for Unicode objects */
static PyUnicodeObject *unicode_freelist;
static int unicode_freelist_size;
/* Default encoding to use and assume when NULL is passed as encoding
parameter; it is initialized by _PyUnicode_Init().
Always use the PyUnicode_SetDefaultEncoding() and
PyUnicode_GetDefaultEncoding() APIs to access this global.
*/
static char unicode_default_encoding[100];
/* --- Unicode Object ----------------------------------------------------- */
static
int _PyUnicode_Resize(register PyUnicodeObject *unicode,
int length)
{
void *oldstr;
/* Shortcut if there's nothing much to do. */
if (unicode->length == length)
goto reset;
/* Resizing unicode_empty is not allowed. */
if (unicode == unicode_empty) {
PyErr_SetString(PyExc_SystemError,
"can't resize empty unicode object");
return -1;
}
/* We allocate one more byte to make sure the string is
Ux0000 terminated -- XXX is this needed ? */
oldstr = unicode->str;
PyMem_RESIZE(unicode->str, Py_UNICODE, length + 1);
if (!unicode->str) {
unicode->str = oldstr;
PyErr_NoMemory();
return -1;
}
unicode->str[length] = 0;
unicode->length = length;
reset:
/* Reset the object caches */
if (unicode->defenc) {
Py_DECREF(unicode->defenc);
unicode->defenc = NULL;
}
unicode->hash = -1;
return 0;
}
int PyUnicode_Resize(PyObject **unicode,
int length)
{
PyUnicodeObject *v;
if (unicode == NULL) {
PyErr_BadInternalCall();
return -1;
}
v = (PyUnicodeObject *)*unicode;
if (v == NULL || !PyUnicode_Check(v) || v->ob_refcnt != 1) {
PyErr_BadInternalCall();
return -1;
}
return _PyUnicode_Resize(v, length);
}
/* We allocate one more byte to make sure the string is
Ux0000 terminated -- XXX is this needed ?
XXX This allocator could further be enhanced by assuring that the
free list never reduces its size below 1.
*/
static
PyUnicodeObject *_PyUnicode_New(int length)
{
register PyUnicodeObject *unicode;
/* Optimization for empty strings */
if (length == 0 && unicode_empty != NULL) {
Py_INCREF(unicode_empty);
return unicode_empty;
}
/* Unicode freelist & memory allocation */
if (unicode_freelist) {
unicode = unicode_freelist;
unicode_freelist = *(PyUnicodeObject **)unicode;
unicode_freelist_size--;
if (unicode->str) {
/* Keep-Alive optimization: we only upsize the buffer,
never downsize it. */
if ((unicode->length < length) &&
_PyUnicode_Resize(unicode, length)) {
PyMem_DEL(unicode->str);
goto onError;
}
}
else {
unicode->str = PyMem_NEW(Py_UNICODE, length + 1);
}
PyObject_INIT(unicode, &PyUnicode_Type);
}
else {
unicode = PyObject_NEW(PyUnicodeObject, &PyUnicode_Type);
if (unicode == NULL)
return NULL;
unicode->str = PyMem_NEW(Py_UNICODE, length + 1);
}
if (!unicode->str) {
PyErr_NoMemory();
goto onError;
}
unicode->str[length] = 0;
unicode->length = length;
unicode->hash = -1;
unicode->defenc = NULL;
return unicode;
onError:
_Py_ForgetReference((PyObject *)unicode);
PyObject_DEL(unicode);
return NULL;
}
static
void _PyUnicode_Free(register PyUnicodeObject *unicode)
{
if (unicode_freelist_size < MAX_UNICODE_FREELIST_SIZE) {
/* Keep-Alive optimization */
if (unicode->length >= KEEPALIVE_SIZE_LIMIT) {
PyMem_DEL(unicode->str);
unicode->str = NULL;
unicode->length = 0;
}
if (unicode->defenc) {
Py_DECREF(unicode->defenc);
unicode->defenc = NULL;
}
/* Add to free list */
*(PyUnicodeObject **)unicode = unicode_freelist;
unicode_freelist = unicode;
unicode_freelist_size++;
}
else {
PyMem_DEL(unicode->str);
Py_XDECREF(unicode->defenc);
PyObject_DEL(unicode);
}
}
PyObject *PyUnicode_FromUnicode(const Py_UNICODE *u,
int size)
{
PyUnicodeObject *unicode;
unicode = _PyUnicode_New(size);
if (!unicode)
return NULL;
/* Copy the Unicode data into the new object */
if (u != NULL)
memcpy(unicode->str, u, size * sizeof(Py_UNICODE));
return (PyObject *)unicode;
}
#ifdef HAVE_WCHAR_H
PyObject *PyUnicode_FromWideChar(register const wchar_t *w,
int size)
{
PyUnicodeObject *unicode;
if (w == NULL) {
PyErr_BadInternalCall();
return NULL;
}
unicode = _PyUnicode_New(size);
if (!unicode)
return NULL;
/* Copy the wchar_t data into the new object */
#ifdef HAVE_USABLE_WCHAR_T
memcpy(unicode->str, w, size * sizeof(wchar_t));
#else
{
register Py_UNICODE *u;
register int i;
u = PyUnicode_AS_UNICODE(unicode);
for (i = size; i >= 0; i--)
*u++ = *w++;
}
#endif
return (PyObject *)unicode;
}
int PyUnicode_AsWideChar(PyUnicodeObject *unicode,
register wchar_t *w,
int size)
{
if (unicode == NULL) {
PyErr_BadInternalCall();
return -1;
}
if (size > PyUnicode_GET_SIZE(unicode))
size = PyUnicode_GET_SIZE(unicode);
#ifdef HAVE_USABLE_WCHAR_T
memcpy(w, unicode->str, size * sizeof(wchar_t));
#else
{
register Py_UNICODE *u;
register int i;
u = PyUnicode_AS_UNICODE(unicode);
for (i = size; i >= 0; i--)
*w++ = *u++;
}
#endif
return size;
}
#endif
PyObject *PyUnicode_FromObject(register PyObject *obj)
{
return PyUnicode_FromEncodedObject(obj, NULL, "strict");
}
PyObject *PyUnicode_FromEncodedObject(register PyObject *obj,
const char *encoding,
const char *errors)
{
const char *s;
int len;
int owned = 0;
PyObject *v;
if (obj == NULL) {
PyErr_BadInternalCall();
return NULL;
}
/* Coerce object */
if (PyInstance_Check(obj)) {
PyObject *func;
func = PyObject_GetAttrString(obj, "__str__");
if (func == NULL) {
PyErr_SetString(PyExc_TypeError,
"coercing to Unicode: instance doesn't define __str__");
return NULL;
}
obj = PyEval_CallObject(func, NULL);
Py_DECREF(func);
if (obj == NULL)
return NULL;
owned = 1;
}
if (PyUnicode_Check(obj)) {
Py_INCREF(obj);
v = obj;
if (encoding) {
PyErr_SetString(PyExc_TypeError,
"decoding Unicode is not supported");
return NULL;
}
goto done;
}
else if (PyString_Check(obj)) {
s = PyString_AS_STRING(obj);
len = PyString_GET_SIZE(obj);
}
else if (PyObject_AsCharBuffer(obj, &s, &len)) {
/* Overwrite the error message with something more useful in
case of a TypeError. */
if (PyErr_ExceptionMatches(PyExc_TypeError))
PyErr_Format(PyExc_TypeError,
"coercing to Unicode: need string or buffer, "
"%.80s found",
obj->ob_type->tp_name);
goto onError;
}
/* Convert to Unicode */
if (len == 0) {
Py_INCREF(unicode_empty);
v = (PyObject *)unicode_empty;
}
else
v = PyUnicode_Decode(s, len, encoding, errors);
done:
if (owned) {
Py_DECREF(obj);
}
return v;
onError:
if (owned) {
Py_DECREF(obj);
}
return NULL;
}
PyObject *PyUnicode_Decode(const char *s,
int size,
const char *encoding,
const char *errors)
{
PyObject *buffer = NULL, *unicode;
if (encoding == NULL)
encoding = PyUnicode_GetDefaultEncoding();
/* Shortcuts for common default encodings */
if (strcmp(encoding, "utf-8") == 0)
return PyUnicode_DecodeUTF8(s, size, errors);
else if (strcmp(encoding, "latin-1") == 0)
return PyUnicode_DecodeLatin1(s, size, errors);
else if (strcmp(encoding, "ascii") == 0)
return PyUnicode_DecodeASCII(s, size, errors);
/* Decode via the codec registry */
buffer = PyBuffer_FromMemory((void *)s, size);
if (buffer == NULL)
goto onError;
unicode = PyCodec_Decode(buffer, encoding, errors);
if (unicode == NULL)
goto onError;
if (!PyUnicode_Check(unicode)) {
PyErr_Format(PyExc_TypeError,
"decoder did not return an unicode object (type=%.400s)",
unicode->ob_type->tp_name);
Py_DECREF(unicode);
goto onError;
}
Py_DECREF(buffer);
return unicode;
onError:
Py_XDECREF(buffer);
return NULL;
}
PyObject *PyUnicode_Encode(const Py_UNICODE *s,
int size,
const char *encoding,
const char *errors)
{
PyObject *v, *unicode;
unicode = PyUnicode_FromUnicode(s, size);
if (unicode == NULL)
return NULL;
v = PyUnicode_AsEncodedString(unicode, encoding, errors);
Py_DECREF(unicode);
return v;
}
PyObject *PyUnicode_AsEncodedString(PyObject *unicode,
const char *encoding,
const char *errors)
{
PyObject *v;
if (!PyUnicode_Check(unicode)) {
PyErr_BadArgument();
goto onError;
}
if (encoding == NULL)
encoding = PyUnicode_GetDefaultEncoding();
/* Shortcuts for common default encodings */
if (errors == NULL) {
if (strcmp(encoding, "utf-8") == 0)
return PyUnicode_AsUTF8String(unicode);
else if (strcmp(encoding, "latin-1") == 0)
return PyUnicode_AsLatin1String(unicode);
else if (strcmp(encoding, "ascii") == 0)
return PyUnicode_AsASCIIString(unicode);
}
/* Encode via the codec registry */
v = PyCodec_Encode(unicode, encoding, errors);
if (v == NULL)
goto onError;
/* XXX Should we really enforce this ? */
if (!PyString_Check(v)) {
PyErr_Format(PyExc_TypeError,
"encoder did not return a string object (type=%.400s)",
v->ob_type->tp_name);
Py_DECREF(v);
goto onError;
}
return v;
onError:
return NULL;
}
/* Return a Python string holding the default encoded value of the
Unicode object.
The resulting string is cached in the Unicode object for subsequent
usage by this function. The cached version is needed to implement
the character buffer interface and will live (at least) as long as
the Unicode object itself.
The refcount of the string is *not* incremented.
*** Exported for internal use by the interpreter only !!! ***
*/
PyObject *_PyUnicode_AsDefaultEncodedString(PyObject *unicode,
const char *errors)
{
PyObject *v = ((PyUnicodeObject *)unicode)->defenc;
if (v)
return v;
v = PyUnicode_AsEncodedString(unicode, NULL, errors);
if (v && errors == NULL)
((PyUnicodeObject *)unicode)->defenc = v;
return v;
}
Py_UNICODE *PyUnicode_AsUnicode(PyObject *unicode)
{
if (!PyUnicode_Check(unicode)) {
PyErr_BadArgument();
goto onError;
}
return PyUnicode_AS_UNICODE(unicode);
onError:
return NULL;
}
int PyUnicode_GetSize(PyObject *unicode)
{
if (!PyUnicode_Check(unicode)) {
PyErr_BadArgument();
goto onError;
}
return PyUnicode_GET_SIZE(unicode);
onError:
return -1;
}
const char *PyUnicode_GetDefaultEncoding(void)
{
return unicode_default_encoding;
}
int PyUnicode_SetDefaultEncoding(const char *encoding)
{
PyObject *v;
/* Make sure the encoding is valid. As side effect, this also
loads the encoding into the codec registry cache. */
v = _PyCodec_Lookup(encoding);
if (v == NULL)
goto onError;
Py_DECREF(v);
strncpy(unicode_default_encoding,
encoding,
sizeof(unicode_default_encoding));
return 0;
onError:
return -1;
}
/* --- UTF-8 Codec -------------------------------------------------------- */
static
char utf8_code_length[256] = {
/* Map UTF-8 encoded prefix byte to sequence length. zero means
illegal prefix. see RFC 2279 for details */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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,
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,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 0, 0
};
static
int utf8_decoding_error(const char **source,
Py_UNICODE **dest,
const char *errors,
const char *details)
{
if ((errors == NULL) ||
(strcmp(errors,"strict") == 0)) {
PyErr_Format(PyExc_UnicodeError,
"UTF-8 decoding error: %.400s",
details);
return -1;
}
else if (strcmp(errors,"ignore") == 0) {
(*source)++;
return 0;
}
else if (strcmp(errors,"replace") == 0) {
(*source)++;
**dest = Py_UNICODE_REPLACEMENT_CHARACTER;
(*dest)++;
return 0;
}
else {
PyErr_Format(PyExc_ValueError,
"UTF-8 decoding error; unknown error handling code: %.400s",
errors);
return -1;
}
}
PyObject *PyUnicode_DecodeUTF8(const char *s,
int size,
const char *errors)
{
int n;
const char *e;
PyUnicodeObject *unicode;
Py_UNICODE *p;
const char *errmsg = "";
/* Note: size will always be longer than the resulting Unicode
character count */
unicode = _PyUnicode_New(size);
if (!unicode)
return NULL;
if (size == 0)
return (PyObject *)unicode;
/* Unpack UTF-8 encoded data */
p = unicode->str;
e = s + size;
while (s < e) {
Py_UCS4 ch = (unsigned char)*s;
if (ch < 0x80) {
*p++ = (Py_UNICODE)ch;
s++;
continue;
}
n = utf8_code_length[ch];
if (s + n > e) {
errmsg = "unexpected end of data";
goto utf8Error;
}
switch (n) {
case 0:
errmsg = "unexpected code byte";
goto utf8Error;
break;
case 1:
errmsg = "internal error";
goto utf8Error;
break;
case 2:
if ((s[1] & 0xc0) != 0x80) {
errmsg = "invalid data";
goto utf8Error;
}
ch = ((s[0] & 0x1f) << 6) + (s[1] & 0x3f);
if (ch < 0x80) {
errmsg = "illegal encoding";
goto utf8Error;
}
else
*p++ = (Py_UNICODE)ch;
break;
case 3:
if ((s[1] & 0xc0) != 0x80 ||
(s[2] & 0xc0) != 0x80) {
errmsg = "invalid data";
goto utf8Error;
}
ch = ((s[0] & 0x0f) << 12) + ((s[1] & 0x3f) << 6) + (s[2] & 0x3f);
if (ch < 0x800 || (ch >= 0xd800 && ch < 0xe000)) {
errmsg = "illegal encoding";
goto utf8Error;
}
else
*p++ = (Py_UNICODE)ch;
break;
case 4:
if ((s[1] & 0xc0) != 0x80 ||
(s[2] & 0xc0) != 0x80 ||
(s[3] & 0xc0) != 0x80) {
errmsg = "invalid data";
goto utf8Error;
}
ch = ((s[0] & 0x7) << 18) + ((s[1] & 0x3f) << 12) +
((s[2] & 0x3f) << 6) + (s[3] & 0x3f);
/* validate and convert to UTF-16 */
if ((ch < 0x10000) || /* minimum value allowed for 4
byte encoding */
(ch > 0x10ffff)) { /* maximum value allowed for
UTF-16 */
errmsg = "illegal encoding";
goto utf8Error;
}
/* compute and append the two surrogates: */
/* translate from 10000..10FFFF to 0..FFFF */
ch -= 0x10000;
/* high surrogate = top 10 bits added to D800 */
*p++ = (Py_UNICODE)(0xD800 + (ch >> 10));
/* low surrogate = bottom 10 bits added to DC00 */
*p++ = (Py_UNICODE)(0xDC00 + (ch & ~0xFC00));
break;
default:
/* Other sizes are only needed for UCS-4 */
errmsg = "unsupported Unicode code range";
goto utf8Error;
break;
}
s += n;
continue;
utf8Error:
if (utf8_decoding_error(&s, &p, errors, errmsg))
goto onError;
}
/* Adjust length */
if (_PyUnicode_Resize(unicode, p - unicode->str))
goto onError;
return (PyObject *)unicode;
onError:
Py_DECREF(unicode);
return NULL;
}
/* Not used anymore, now that the encoder supports UTF-16
surrogates. */
#if 0
static
int utf8_encoding_error(const Py_UNICODE **source,
char **dest,
const char *errors,
const char *details)
{
if ((errors == NULL) ||
(strcmp(errors,"strict") == 0)) {
PyErr_Format(PyExc_UnicodeError,
"UTF-8 encoding error: %.400s",
details);
return -1;
}
else if (strcmp(errors,"ignore") == 0) {
return 0;
}
else if (strcmp(errors,"replace") == 0) {
**dest = '?';
(*dest)++;
return 0;
}
else {
PyErr_Format(PyExc_ValueError,
"UTF-8 encoding error; "
"unknown error handling code: %.400s",
errors);
return -1;
}
}
#endif
PyObject *PyUnicode_EncodeUTF8(const Py_UNICODE *s,
int size,
const char *errors)
{
PyObject *v;
char *p;
char *q;
Py_UCS4 ch2;
unsigned int cbAllocated = 3 * size;
unsigned int cbWritten = 0;
int i = 0;
v = PyString_FromStringAndSize(NULL, cbAllocated);
if (v == NULL)
return NULL;
if (size == 0)
return v;
p = q = PyString_AS_STRING(v);
while (i < size) {
Py_UCS4 ch = s[i++];
if (ch < 0x80) {
*p++ = (char) ch;
cbWritten++;
}
else if (ch < 0x0800) {
*p++ = 0xc0 | (ch >> 6);
*p++ = 0x80 | (ch & 0x3f);
cbWritten += 2;
}
else {
/* Check for high surrogate */
if (0xD800 <= ch && ch <= 0xDBFF) {
if (i != size) {
ch2 = s[i];
if (0xDC00 <= ch2 && ch2 <= 0xDFFF) {
if (cbWritten >= (cbAllocated - 4)) {
/* Provide enough room for some more
surrogates */
cbAllocated += 4*10;
if (_PyString_Resize(&v, cbAllocated))
goto onError;
}
/* combine the two values */
ch = ((ch - 0xD800)<<10 | (ch2-0xDC00))+0x10000;
*p++ = (char)((ch >> 18) | 0xf0);
*p++ = (char)(0x80 | ((ch >> 12) & 0x3f));
i++;
cbWritten += 4;
}
}
}
else {
*p++ = (char)(0xe0 | (ch >> 12));
cbWritten += 3;
}
*p++ = (char)(0x80 | ((ch >> 6) & 0x3f));
*p++ = (char)(0x80 | (ch & 0x3f));
}
}
*p = '\0';
if (_PyString_Resize(&v, p - q))
goto onError;
return v;
onError:
Py_DECREF(v);
return NULL;
}
PyObject *PyUnicode_AsUTF8String(PyObject *unicode)
{
if (!PyUnicode_Check(unicode)) {
PyErr_BadArgument();
return NULL;
}
return PyUnicode_EncodeUTF8(PyUnicode_AS_UNICODE(unicode),
PyUnicode_GET_SIZE(unicode),
NULL);
}
/* --- UTF-16 Codec ------------------------------------------------------- */
static
int utf16_decoding_error(const Py_UNICODE **source,
Py_UNICODE **dest,
const char *errors,
const char *details)
{
if ((errors == NULL) ||
(strcmp(errors,"strict") == 0)) {
PyErr_Format(PyExc_UnicodeError,
"UTF-16 decoding error: %.400s",
details);
return -1;
}
else if (strcmp(errors,"ignore") == 0) {
return 0;
}
else if (strcmp(errors,"replace") == 0) {
if (dest) {
**dest = Py_UNICODE_REPLACEMENT_CHARACTER;
(*dest)++;
}
return 0;
}
else {
PyErr_Format(PyExc_ValueError,
"UTF-16 decoding error; "
"unknown error handling code: %.400s",
errors);
return -1;
}
}
PyObject *PyUnicode_DecodeUTF16(const char *s,
int size,
const char *errors,
int *byteorder)
{
PyUnicodeObject *unicode;
Py_UNICODE *p;
const Py_UNICODE *q, *e;
int bo = 0;
const char *errmsg = "";
/* size should be an even number */
if (size % sizeof(Py_UNICODE) != 0) {
if (utf16_decoding_error(NULL, NULL, errors, "truncated data"))
return NULL;
/* The remaining input chars are ignored if we fall through
here... */
}
/* Note: size will always be longer than the resulting Unicode
character count */
unicode = _PyUnicode_New(size);
if (!unicode)
return NULL;
if (size == 0)
return (PyObject *)unicode;
/* Unpack UTF-16 encoded data */
p = unicode->str;
q = (Py_UNICODE *)s;
e = q + (size / sizeof(Py_UNICODE));
if (byteorder)
bo = *byteorder;
while (q < e) {
register Py_UNICODE ch = *q++;
/* Check for BOM marks (U+FEFF) in the input and adjust
current byte order setting accordingly. Swap input
bytes if needed. (This assumes sizeof(Py_UNICODE) == 2
!) */
#ifdef BYTEORDER_IS_LITTLE_ENDIAN
if (ch == 0xFEFF) {
bo = -1;
continue;
} else if (ch == 0xFFFE) {
bo = 1;
continue;
}
if (bo == 1)
ch = (ch >> 8) | (ch << 8);
#else
if (ch == 0xFEFF) {
bo = 1;
continue;
} else if (ch == 0xFFFE) {
bo = -1;
continue;