mirror of
https://github.com/python/cpython.git
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755 lines
18 KiB
C
755 lines
18 KiB
C
/* ------------------------------------------------------------------------
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_codecs -- Provides access to the codec registry and the builtin
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codecs.
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This module should never be imported directly. The standard library
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module "codecs" wraps this builtin module for use within Python.
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The codec registry is accessible via:
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register(search_function) -> None
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lookup(encoding) -> (encoder, decoder, stream_reader, stream_writer)
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The builtin Unicode codecs use the following interface:
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<encoding>_encode(Unicode_object[,errors='strict']) ->
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(string object, bytes consumed)
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<encoding>_decode(char_buffer_obj[,errors='strict']) ->
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(Unicode object, bytes consumed)
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<encoding>_encode() interfaces also accept non-Unicode object as
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input. The objects are then converted to Unicode using
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PyUnicode_FromObject() prior to applying the conversion.
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These <encoding>s are available: utf_8, unicode_escape,
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raw_unicode_escape, unicode_internal, latin_1, ascii (7-bit),
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mbcs (on win32).
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Written by Marc-Andre Lemburg (mal@lemburg.com).
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Copyright (c) Corporation for National Research Initiatives.
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------------------------------------------------------------------------ */
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#include "Python.h"
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/* --- Registry ----------------------------------------------------------- */
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static
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PyObject *codecregister(PyObject *self, PyObject *args)
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{
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PyObject *search_function;
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if (!PyArg_ParseTuple(args, "O:register", &search_function))
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goto onError;
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if (PyCodec_Register(search_function))
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goto onError;
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Py_INCREF(Py_None);
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return Py_None;
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onError:
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return NULL;
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}
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static
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PyObject *codeclookup(PyObject *self, PyObject *args)
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{
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char *encoding;
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if (!PyArg_ParseTuple(args, "s:lookup", &encoding))
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goto onError;
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return _PyCodec_Lookup(encoding);
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onError:
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return NULL;
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}
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/* --- Helpers ------------------------------------------------------------ */
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static
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PyObject *codec_tuple(PyObject *unicode,
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int len)
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{
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PyObject *v,*w;
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if (unicode == NULL)
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return NULL;
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v = PyTuple_New(2);
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if (v == NULL) {
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Py_DECREF(unicode);
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return NULL;
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}
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PyTuple_SET_ITEM(v,0,unicode);
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w = PyInt_FromLong(len);
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if (w == NULL) {
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Py_DECREF(v);
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return NULL;
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}
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PyTuple_SET_ITEM(v,1,w);
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return v;
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}
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/* --- String codecs ------------------------------------------------------ */
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static PyObject *
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escape_decode(PyObject *self,
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PyObject *args)
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{
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const char *errors = NULL;
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const char *data;
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int size;
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if (!PyArg_ParseTuple(args, "s#|z:escape_decode",
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&data, &size, &errors))
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return NULL;
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return codec_tuple(PyString_DecodeEscape(data, size, errors, 0, NULL),
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size);
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}
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static PyObject *
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escape_encode(PyObject *self,
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PyObject *args)
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{
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PyObject *str;
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const char *errors = NULL;
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char *buf;
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int len;
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if (!PyArg_ParseTuple(args, "O!|z:escape_encode",
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&PyString_Type, &str, &errors))
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return NULL;
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str = PyString_Repr(str, 0);
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if (!str)
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return NULL;
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/* The string will be quoted. Unquote, similar to unicode-escape. */
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buf = PyString_AS_STRING (str);
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len = PyString_GET_SIZE (str);
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memmove(buf, buf+1, len-2);
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_PyString_Resize(&str, len-2);
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return codec_tuple(str, PyString_Size(str));
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}
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#ifdef Py_USING_UNICODE
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/* --- Decoder ------------------------------------------------------------ */
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static PyObject *
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unicode_internal_decode(PyObject *self,
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PyObject *args)
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{
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PyObject *obj;
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const char *errors = NULL;
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const char *data;
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int size;
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if (!PyArg_ParseTuple(args, "O|z:unicode_internal_decode",
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&obj, &errors))
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return NULL;
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if (PyUnicode_Check(obj))
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return codec_tuple(obj, PyUnicode_GET_SIZE(obj));
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else {
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if (PyObject_AsReadBuffer(obj, (const void **)&data, &size))
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return NULL;
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return codec_tuple(PyUnicode_FromUnicode((Py_UNICODE *)data,
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size / sizeof(Py_UNICODE)),
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size);
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}
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}
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static PyObject *
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utf_7_decode(PyObject *self,
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PyObject *args)
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{
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const char *data;
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int size;
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const char *errors = NULL;
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if (!PyArg_ParseTuple(args, "t#|z:utf_7_decode",
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&data, &size, &errors))
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return NULL;
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return codec_tuple(PyUnicode_DecodeUTF7(data, size, errors),
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size);
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}
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static PyObject *
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utf_8_decode(PyObject *self,
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PyObject *args)
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{
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const char *data;
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int size;
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const char *errors = NULL;
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if (!PyArg_ParseTuple(args, "t#|z:utf_8_decode",
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&data, &size, &errors))
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return NULL;
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return codec_tuple(PyUnicode_DecodeUTF8(data, size, errors),
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size);
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}
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static PyObject *
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utf_16_decode(PyObject *self,
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PyObject *args)
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{
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const char *data;
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int size;
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const char *errors = NULL;
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int byteorder = 0;
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if (!PyArg_ParseTuple(args, "t#|z:utf_16_decode",
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&data, &size, &errors))
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return NULL;
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return codec_tuple(PyUnicode_DecodeUTF16(data, size, errors, &byteorder),
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size);
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}
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static PyObject *
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utf_16_le_decode(PyObject *self,
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PyObject *args)
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{
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const char *data;
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int size;
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const char *errors = NULL;
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int byteorder = -1;
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if (!PyArg_ParseTuple(args, "t#|z:utf_16_le_decode",
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&data, &size, &errors))
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return NULL;
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return codec_tuple(PyUnicode_DecodeUTF16(data, size, errors, &byteorder),
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size);
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}
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static PyObject *
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utf_16_be_decode(PyObject *self,
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PyObject *args)
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{
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const char *data;
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int size;
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const char *errors = NULL;
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int byteorder = 1;
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if (!PyArg_ParseTuple(args, "t#|z:utf_16_be_decode",
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&data, &size, &errors))
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return NULL;
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return codec_tuple(PyUnicode_DecodeUTF16(data, size, errors, &byteorder),
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size);
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}
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/* This non-standard version also provides access to the byteorder
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parameter of the builtin UTF-16 codec.
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It returns a tuple (unicode, bytesread, byteorder) with byteorder
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being the value in effect at the end of data.
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*/
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static PyObject *
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utf_16_ex_decode(PyObject *self,
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PyObject *args)
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{
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const char *data;
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int size;
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const char *errors = NULL;
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int byteorder = 0;
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PyObject *unicode, *tuple;
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if (!PyArg_ParseTuple(args, "t#|zi:utf_16_ex_decode",
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&data, &size, &errors, &byteorder))
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return NULL;
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unicode = PyUnicode_DecodeUTF16(data, size, errors, &byteorder);
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if (unicode == NULL)
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return NULL;
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tuple = Py_BuildValue("Oii", unicode, size, byteorder);
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Py_DECREF(unicode);
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return tuple;
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}
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static PyObject *
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unicode_escape_decode(PyObject *self,
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PyObject *args)
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{
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const char *data;
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int size;
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const char *errors = NULL;
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if (!PyArg_ParseTuple(args, "t#|z:unicode_escape_decode",
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&data, &size, &errors))
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return NULL;
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return codec_tuple(PyUnicode_DecodeUnicodeEscape(data, size, errors),
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size);
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}
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static PyObject *
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raw_unicode_escape_decode(PyObject *self,
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PyObject *args)
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{
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const char *data;
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int size;
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const char *errors = NULL;
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if (!PyArg_ParseTuple(args, "t#|z:raw_unicode_escape_decode",
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&data, &size, &errors))
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return NULL;
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return codec_tuple(PyUnicode_DecodeRawUnicodeEscape(data, size, errors),
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size);
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}
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static PyObject *
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latin_1_decode(PyObject *self,
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PyObject *args)
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{
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const char *data;
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int size;
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const char *errors = NULL;
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if (!PyArg_ParseTuple(args, "t#|z:latin_1_decode",
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&data, &size, &errors))
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return NULL;
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return codec_tuple(PyUnicode_DecodeLatin1(data, size, errors),
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size);
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}
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static PyObject *
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ascii_decode(PyObject *self,
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PyObject *args)
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{
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const char *data;
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int size;
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const char *errors = NULL;
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if (!PyArg_ParseTuple(args, "t#|z:ascii_decode",
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&data, &size, &errors))
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return NULL;
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return codec_tuple(PyUnicode_DecodeASCII(data, size, errors),
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size);
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}
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static PyObject *
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charmap_decode(PyObject *self,
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PyObject *args)
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{
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const char *data;
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int size;
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const char *errors = NULL;
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PyObject *mapping = NULL;
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if (!PyArg_ParseTuple(args, "t#|zO:charmap_decode",
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&data, &size, &errors, &mapping))
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return NULL;
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if (mapping == Py_None)
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mapping = NULL;
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return codec_tuple(PyUnicode_DecodeCharmap(data, size, mapping, errors),
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size);
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}
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#if defined(MS_WINDOWS) && defined(HAVE_USABLE_WCHAR_T)
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static PyObject *
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mbcs_decode(PyObject *self,
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PyObject *args)
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{
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const char *data;
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int size;
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const char *errors = NULL;
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if (!PyArg_ParseTuple(args, "t#|z:mbcs_decode",
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&data, &size, &errors))
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return NULL;
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return codec_tuple(PyUnicode_DecodeMBCS(data, size, errors),
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size);
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}
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#endif /* MS_WINDOWS */
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/* --- Encoder ------------------------------------------------------------ */
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static PyObject *
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readbuffer_encode(PyObject *self,
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PyObject *args)
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{
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const char *data;
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int size;
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const char *errors = NULL;
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if (!PyArg_ParseTuple(args, "s#|z:readbuffer_encode",
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&data, &size, &errors))
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return NULL;
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return codec_tuple(PyString_FromStringAndSize(data, size),
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size);
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}
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static PyObject *
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charbuffer_encode(PyObject *self,
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PyObject *args)
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{
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const char *data;
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int size;
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const char *errors = NULL;
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if (!PyArg_ParseTuple(args, "t#|z:charbuffer_encode",
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&data, &size, &errors))
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return NULL;
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return codec_tuple(PyString_FromStringAndSize(data, size),
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size);
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}
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static PyObject *
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unicode_internal_encode(PyObject *self,
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PyObject *args)
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{
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PyObject *obj;
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const char *errors = NULL;
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const char *data;
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int size;
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if (!PyArg_ParseTuple(args, "O|z:unicode_internal_encode",
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&obj, &errors))
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return NULL;
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if (PyUnicode_Check(obj)) {
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data = PyUnicode_AS_DATA(obj);
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size = PyUnicode_GET_DATA_SIZE(obj);
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return codec_tuple(PyString_FromStringAndSize(data, size),
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size);
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}
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else {
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if (PyObject_AsReadBuffer(obj, (const void **)&data, &size))
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return NULL;
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return codec_tuple(PyString_FromStringAndSize(data, size),
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size);
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}
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}
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static PyObject *
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utf_7_encode(PyObject *self,
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PyObject *args)
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{
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PyObject *str, *v;
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const char *errors = NULL;
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if (!PyArg_ParseTuple(args, "O|z:utf_7_encode",
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&str, &errors))
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return NULL;
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str = PyUnicode_FromObject(str);
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if (str == NULL)
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return NULL;
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v = codec_tuple(PyUnicode_EncodeUTF7(PyUnicode_AS_UNICODE(str),
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PyUnicode_GET_SIZE(str),
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0,
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0,
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errors),
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PyUnicode_GET_SIZE(str));
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Py_DECREF(str);
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return v;
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}
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static PyObject *
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utf_8_encode(PyObject *self,
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PyObject *args)
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{
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PyObject *str, *v;
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const char *errors = NULL;
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if (!PyArg_ParseTuple(args, "O|z:utf_8_encode",
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&str, &errors))
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return NULL;
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str = PyUnicode_FromObject(str);
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if (str == NULL)
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return NULL;
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v = codec_tuple(PyUnicode_EncodeUTF8(PyUnicode_AS_UNICODE(str),
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PyUnicode_GET_SIZE(str),
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errors),
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PyUnicode_GET_SIZE(str));
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Py_DECREF(str);
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return v;
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}
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/* This version provides access to the byteorder parameter of the
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builtin UTF-16 codecs as optional third argument. It defaults to 0
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which means: use the native byte order and prepend the data with a
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BOM mark.
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*/
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static PyObject *
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utf_16_encode(PyObject *self,
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PyObject *args)
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{
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PyObject *str, *v;
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const char *errors = NULL;
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int byteorder = 0;
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if (!PyArg_ParseTuple(args, "O|zi:utf_16_encode",
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&str, &errors, &byteorder))
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return NULL;
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str = PyUnicode_FromObject(str);
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if (str == NULL)
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return NULL;
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v = codec_tuple(PyUnicode_EncodeUTF16(PyUnicode_AS_UNICODE(str),
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PyUnicode_GET_SIZE(str),
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errors,
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byteorder),
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PyUnicode_GET_SIZE(str));
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Py_DECREF(str);
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return v;
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}
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static PyObject *
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utf_16_le_encode(PyObject *self,
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PyObject *args)
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{
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PyObject *str, *v;
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const char *errors = NULL;
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if (!PyArg_ParseTuple(args, "O|z:utf_16_le_encode",
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&str, &errors))
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return NULL;
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str = PyUnicode_FromObject(str);
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if (str == NULL)
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return NULL;
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v = codec_tuple(PyUnicode_EncodeUTF16(PyUnicode_AS_UNICODE(str),
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PyUnicode_GET_SIZE(str),
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errors,
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-1),
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PyUnicode_GET_SIZE(str));
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Py_DECREF(str);
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return v;
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}
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static PyObject *
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utf_16_be_encode(PyObject *self,
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PyObject *args)
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{
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PyObject *str, *v;
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const char *errors = NULL;
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if (!PyArg_ParseTuple(args, "O|z:utf_16_be_encode",
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&str, &errors))
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return NULL;
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str = PyUnicode_FromObject(str);
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if (str == NULL)
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return NULL;
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v = codec_tuple(PyUnicode_EncodeUTF16(PyUnicode_AS_UNICODE(str),
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PyUnicode_GET_SIZE(str),
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errors,
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+1),
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PyUnicode_GET_SIZE(str));
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Py_DECREF(str);
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return v;
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}
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static PyObject *
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unicode_escape_encode(PyObject *self,
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PyObject *args)
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{
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PyObject *str, *v;
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const char *errors = NULL;
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if (!PyArg_ParseTuple(args, "O|z:unicode_escape_encode",
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&str, &errors))
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return NULL;
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str = PyUnicode_FromObject(str);
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if (str == NULL)
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return NULL;
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v = codec_tuple(PyUnicode_EncodeUnicodeEscape(PyUnicode_AS_UNICODE(str),
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PyUnicode_GET_SIZE(str)),
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PyUnicode_GET_SIZE(str));
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Py_DECREF(str);
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return v;
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}
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static PyObject *
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raw_unicode_escape_encode(PyObject *self,
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PyObject *args)
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|
{
|
|
PyObject *str, *v;
|
|
const char *errors = NULL;
|
|
|
|
if (!PyArg_ParseTuple(args, "O|z:raw_unicode_escape_encode",
|
|
&str, &errors))
|
|
return NULL;
|
|
|
|
str = PyUnicode_FromObject(str);
|
|
if (str == NULL)
|
|
return NULL;
|
|
v = codec_tuple(PyUnicode_EncodeRawUnicodeEscape(
|
|
PyUnicode_AS_UNICODE(str),
|
|
PyUnicode_GET_SIZE(str)),
|
|
PyUnicode_GET_SIZE(str));
|
|
Py_DECREF(str);
|
|
return v;
|
|
}
|
|
|
|
static PyObject *
|
|
latin_1_encode(PyObject *self,
|
|
PyObject *args)
|
|
{
|
|
PyObject *str, *v;
|
|
const char *errors = NULL;
|
|
|
|
if (!PyArg_ParseTuple(args, "O|z:latin_1_encode",
|
|
&str, &errors))
|
|
return NULL;
|
|
|
|
str = PyUnicode_FromObject(str);
|
|
if (str == NULL)
|
|
return NULL;
|
|
v = codec_tuple(PyUnicode_EncodeLatin1(
|
|
PyUnicode_AS_UNICODE(str),
|
|
PyUnicode_GET_SIZE(str),
|
|
errors),
|
|
PyUnicode_GET_SIZE(str));
|
|
Py_DECREF(str);
|
|
return v;
|
|
}
|
|
|
|
static PyObject *
|
|
ascii_encode(PyObject *self,
|
|
PyObject *args)
|
|
{
|
|
PyObject *str, *v;
|
|
const char *errors = NULL;
|
|
|
|
if (!PyArg_ParseTuple(args, "O|z:ascii_encode",
|
|
&str, &errors))
|
|
return NULL;
|
|
|
|
str = PyUnicode_FromObject(str);
|
|
if (str == NULL)
|
|
return NULL;
|
|
v = codec_tuple(PyUnicode_EncodeASCII(
|
|
PyUnicode_AS_UNICODE(str),
|
|
PyUnicode_GET_SIZE(str),
|
|
errors),
|
|
PyUnicode_GET_SIZE(str));
|
|
Py_DECREF(str);
|
|
return v;
|
|
}
|
|
|
|
static PyObject *
|
|
charmap_encode(PyObject *self,
|
|
PyObject *args)
|
|
{
|
|
PyObject *str, *v;
|
|
const char *errors = NULL;
|
|
PyObject *mapping = NULL;
|
|
|
|
if (!PyArg_ParseTuple(args, "O|zO:charmap_encode",
|
|
&str, &errors, &mapping))
|
|
return NULL;
|
|
if (mapping == Py_None)
|
|
mapping = NULL;
|
|
|
|
str = PyUnicode_FromObject(str);
|
|
if (str == NULL)
|
|
return NULL;
|
|
v = codec_tuple(PyUnicode_EncodeCharmap(
|
|
PyUnicode_AS_UNICODE(str),
|
|
PyUnicode_GET_SIZE(str),
|
|
mapping,
|
|
errors),
|
|
PyUnicode_GET_SIZE(str));
|
|
Py_DECREF(str);
|
|
return v;
|
|
}
|
|
|
|
#if defined(MS_WINDOWS) && defined(HAVE_USABLE_WCHAR_T)
|
|
|
|
static PyObject *
|
|
mbcs_encode(PyObject *self,
|
|
PyObject *args)
|
|
{
|
|
PyObject *str, *v;
|
|
const char *errors = NULL;
|
|
|
|
if (!PyArg_ParseTuple(args, "O|z:mbcs_encode",
|
|
&str, &errors))
|
|
return NULL;
|
|
|
|
str = PyUnicode_FromObject(str);
|
|
if (str == NULL)
|
|
return NULL;
|
|
v = codec_tuple(PyUnicode_EncodeMBCS(
|
|
PyUnicode_AS_UNICODE(str),
|
|
PyUnicode_GET_SIZE(str),
|
|
errors),
|
|
PyUnicode_GET_SIZE(str));
|
|
Py_DECREF(str);
|
|
return v;
|
|
}
|
|
|
|
#endif /* MS_WINDOWS */
|
|
#endif /* Py_USING_UNICODE */
|
|
|
|
/* --- Module API --------------------------------------------------------- */
|
|
|
|
static PyMethodDef _codecs_functions[] = {
|
|
{"register", codecregister, METH_VARARGS},
|
|
{"lookup", codeclookup, METH_VARARGS},
|
|
{"escape_encode", escape_encode, METH_VARARGS},
|
|
{"escape_decode", escape_decode, METH_VARARGS},
|
|
#ifdef Py_USING_UNICODE
|
|
{"utf_8_encode", utf_8_encode, METH_VARARGS},
|
|
{"utf_8_decode", utf_8_decode, METH_VARARGS},
|
|
{"utf_7_encode", utf_7_encode, METH_VARARGS},
|
|
{"utf_7_decode", utf_7_decode, METH_VARARGS},
|
|
{"utf_16_encode", utf_16_encode, METH_VARARGS},
|
|
{"utf_16_le_encode", utf_16_le_encode, METH_VARARGS},
|
|
{"utf_16_be_encode", utf_16_be_encode, METH_VARARGS},
|
|
{"utf_16_decode", utf_16_decode, METH_VARARGS},
|
|
{"utf_16_le_decode", utf_16_le_decode, METH_VARARGS},
|
|
{"utf_16_be_decode", utf_16_be_decode, METH_VARARGS},
|
|
{"utf_16_ex_decode", utf_16_ex_decode, METH_VARARGS},
|
|
{"unicode_escape_encode", unicode_escape_encode, METH_VARARGS},
|
|
{"unicode_escape_decode", unicode_escape_decode, METH_VARARGS},
|
|
{"unicode_internal_encode", unicode_internal_encode, METH_VARARGS},
|
|
{"unicode_internal_decode", unicode_internal_decode, METH_VARARGS},
|
|
{"raw_unicode_escape_encode", raw_unicode_escape_encode, METH_VARARGS},
|
|
{"raw_unicode_escape_decode", raw_unicode_escape_decode, METH_VARARGS},
|
|
{"latin_1_encode", latin_1_encode, METH_VARARGS},
|
|
{"latin_1_decode", latin_1_decode, METH_VARARGS},
|
|
{"ascii_encode", ascii_encode, METH_VARARGS},
|
|
{"ascii_decode", ascii_decode, METH_VARARGS},
|
|
{"charmap_encode", charmap_encode, METH_VARARGS},
|
|
{"charmap_decode", charmap_decode, METH_VARARGS},
|
|
{"readbuffer_encode", readbuffer_encode, METH_VARARGS},
|
|
{"charbuffer_encode", charbuffer_encode, METH_VARARGS},
|
|
#if defined(MS_WINDOWS) && defined(HAVE_USABLE_WCHAR_T)
|
|
{"mbcs_encode", mbcs_encode, METH_VARARGS},
|
|
{"mbcs_decode", mbcs_decode, METH_VARARGS},
|
|
#endif
|
|
#endif /* Py_USING_UNICODE */
|
|
{NULL, NULL} /* sentinel */
|
|
};
|
|
|
|
PyMODINIT_FUNC
|
|
init_codecs(void)
|
|
{
|
|
Py_InitModule("_codecs", _codecs_functions);
|
|
}
|