mirror of
https://github.com/python/cpython.git
synced 2025-10-22 17:33:55 +00:00
1049 lines
30 KiB
C
1049 lines
30 KiB
C
/* ------------------------------------------------------------------------
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Python Codec Registry and support functions
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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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#include <ctype.h>
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const char *Py_hexdigits = "0123456789abcdef";
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/* --- Codec Registry ----------------------------------------------------- */
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/* Import the standard encodings package which will register the first
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codec search function.
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This is done in a lazy way so that the Unicode implementation does
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not downgrade startup time of scripts not needing it.
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ImportErrors are silently ignored by this function. Only one try is
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made.
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*/
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static int _PyCodecRegistry_Init(void); /* Forward */
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int PyCodec_Register(PyObject *search_function)
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{
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PyInterpreterState *interp = PyThreadState_GET()->interp;
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if (interp->codec_search_path == NULL && _PyCodecRegistry_Init())
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goto onError;
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if (search_function == NULL) {
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PyErr_BadArgument();
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goto onError;
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}
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if (!PyCallable_Check(search_function)) {
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PyErr_SetString(PyExc_TypeError, "argument must be callable");
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goto onError;
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}
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return PyList_Append(interp->codec_search_path, search_function);
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onError:
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return -1;
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}
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/* Convert a string to a normalized Python string: all characters are
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converted to lower case, spaces are replaced with underscores. */
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static
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PyObject *normalizestring(const char *string)
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{
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register size_t i;
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size_t len = strlen(string);
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char *p;
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PyObject *v;
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if (len > PY_SSIZE_T_MAX) {
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PyErr_SetString(PyExc_OverflowError, "string is too large");
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return NULL;
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}
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p = PyMem_Malloc(len + 1);
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if (p == NULL)
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return NULL;
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for (i = 0; i < len; i++) {
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register char ch = string[i];
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if (ch == ' ')
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ch = '-';
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else
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ch = Py_TOLOWER(Py_CHARMASK(ch));
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p[i] = ch;
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}
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p[i] = '\0';
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v = PyUnicode_FromString(p);
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if (v == NULL)
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return NULL;
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PyMem_Free(p);
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return v;
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}
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/* Lookup the given encoding and return a tuple providing the codec
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facilities.
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The encoding string is looked up converted to all lower-case
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characters. This makes encodings looked up through this mechanism
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effectively case-insensitive.
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If no codec is found, a LookupError is set and NULL returned.
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As side effect, this tries to load the encodings package, if not
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yet done. This is part of the lazy load strategy for the encodings
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package.
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*/
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PyObject *_PyCodec_Lookup(const char *encoding)
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{
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PyInterpreterState *interp;
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PyObject *result, *args = NULL, *v;
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Py_ssize_t i, len;
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if (encoding == NULL) {
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PyErr_BadArgument();
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goto onError;
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}
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interp = PyThreadState_GET()->interp;
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if (interp->codec_search_path == NULL && _PyCodecRegistry_Init())
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goto onError;
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/* Convert the encoding to a normalized Python string: all
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characters are converted to lower case, spaces and hyphens are
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replaced with underscores. */
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v = normalizestring(encoding);
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if (v == NULL)
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goto onError;
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PyUnicode_InternInPlace(&v);
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/* First, try to lookup the name in the registry dictionary */
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result = PyDict_GetItem(interp->codec_search_cache, v);
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if (result != NULL) {
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Py_INCREF(result);
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Py_DECREF(v);
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return result;
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}
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/* Next, scan the search functions in order of registration */
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args = PyTuple_New(1);
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if (args == NULL)
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goto onError;
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PyTuple_SET_ITEM(args,0,v);
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len = PyList_Size(interp->codec_search_path);
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if (len < 0)
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goto onError;
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if (len == 0) {
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PyErr_SetString(PyExc_LookupError,
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"no codec search functions registered: "
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"can't find encoding");
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goto onError;
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}
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for (i = 0; i < len; i++) {
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PyObject *func;
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func = PyList_GetItem(interp->codec_search_path, i);
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if (func == NULL)
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goto onError;
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result = PyEval_CallObject(func, args);
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if (result == NULL)
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goto onError;
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if (result == Py_None) {
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Py_DECREF(result);
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continue;
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}
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if (!PyTuple_Check(result) || PyTuple_GET_SIZE(result) != 4) {
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PyErr_SetString(PyExc_TypeError,
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"codec search functions must return 4-tuples");
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Py_DECREF(result);
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goto onError;
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}
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break;
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}
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if (i == len) {
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/* XXX Perhaps we should cache misses too ? */
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PyErr_Format(PyExc_LookupError,
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"unknown encoding: %s", encoding);
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goto onError;
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}
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/* Cache and return the result */
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if (PyDict_SetItem(interp->codec_search_cache, v, result) < 0) {
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Py_DECREF(result);
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goto onError;
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}
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Py_DECREF(args);
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return result;
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onError:
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Py_XDECREF(args);
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return NULL;
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}
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/* Codec registry encoding check API. */
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int PyCodec_KnownEncoding(const char *encoding)
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{
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PyObject *codecs;
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codecs = _PyCodec_Lookup(encoding);
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if (!codecs) {
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PyErr_Clear();
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return 0;
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}
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else {
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Py_DECREF(codecs);
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return 1;
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}
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}
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static
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PyObject *args_tuple(PyObject *object,
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const char *errors)
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{
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PyObject *args;
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args = PyTuple_New(1 + (errors != NULL));
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if (args == NULL)
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return NULL;
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Py_INCREF(object);
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PyTuple_SET_ITEM(args,0,object);
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if (errors) {
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PyObject *v;
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v = PyUnicode_FromString(errors);
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if (v == NULL) {
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Py_DECREF(args);
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return NULL;
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}
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PyTuple_SET_ITEM(args, 1, v);
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}
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return args;
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}
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/* Helper function to get a codec item */
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static
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PyObject *codec_getitem(const char *encoding, int index)
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{
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PyObject *codecs;
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PyObject *v;
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codecs = _PyCodec_Lookup(encoding);
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if (codecs == NULL)
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return NULL;
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v = PyTuple_GET_ITEM(codecs, index);
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Py_DECREF(codecs);
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Py_INCREF(v);
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return v;
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}
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/* Helper function to create an incremental codec. */
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static
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PyObject *codec_getincrementalcodec(const char *encoding,
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const char *errors,
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const char *attrname)
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{
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PyObject *codecs, *ret, *inccodec;
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codecs = _PyCodec_Lookup(encoding);
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if (codecs == NULL)
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return NULL;
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inccodec = PyObject_GetAttrString(codecs, attrname);
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Py_DECREF(codecs);
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if (inccodec == NULL)
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return NULL;
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if (errors)
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ret = PyObject_CallFunction(inccodec, "s", errors);
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else
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ret = PyObject_CallFunction(inccodec, NULL);
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Py_DECREF(inccodec);
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return ret;
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}
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/* Helper function to create a stream codec. */
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static
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PyObject *codec_getstreamcodec(const char *encoding,
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PyObject *stream,
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const char *errors,
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const int index)
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{
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PyObject *codecs, *streamcodec, *codeccls;
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codecs = _PyCodec_Lookup(encoding);
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if (codecs == NULL)
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return NULL;
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codeccls = PyTuple_GET_ITEM(codecs, index);
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if (errors != NULL)
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streamcodec = PyObject_CallFunction(codeccls, "Os", stream, errors);
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else
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streamcodec = PyObject_CallFunction(codeccls, "O", stream);
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Py_DECREF(codecs);
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return streamcodec;
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}
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/* Convenience APIs to query the Codec registry.
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All APIs return a codec object with incremented refcount.
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*/
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PyObject *PyCodec_Encoder(const char *encoding)
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{
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return codec_getitem(encoding, 0);
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}
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PyObject *PyCodec_Decoder(const char *encoding)
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{
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return codec_getitem(encoding, 1);
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}
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PyObject *PyCodec_IncrementalEncoder(const char *encoding,
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const char *errors)
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{
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return codec_getincrementalcodec(encoding, errors, "incrementalencoder");
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}
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PyObject *PyCodec_IncrementalDecoder(const char *encoding,
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const char *errors)
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{
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return codec_getincrementalcodec(encoding, errors, "incrementaldecoder");
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}
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PyObject *PyCodec_StreamReader(const char *encoding,
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PyObject *stream,
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const char *errors)
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{
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return codec_getstreamcodec(encoding, stream, errors, 2);
|
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}
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PyObject *PyCodec_StreamWriter(const char *encoding,
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PyObject *stream,
|
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const char *errors)
|
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{
|
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return codec_getstreamcodec(encoding, stream, errors, 3);
|
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}
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|
|
/* Encode an object (e.g. an Unicode object) using the given encoding
|
|
and return the resulting encoded object (usually a Python string).
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|
|
|
errors is passed to the encoder factory as argument if non-NULL. */
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|
|
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PyObject *PyCodec_Encode(PyObject *object,
|
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const char *encoding,
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const char *errors)
|
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{
|
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PyObject *encoder = NULL;
|
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PyObject *args = NULL, *result = NULL;
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PyObject *v = NULL;
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encoder = PyCodec_Encoder(encoding);
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if (encoder == NULL)
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goto onError;
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args = args_tuple(object, errors);
|
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if (args == NULL)
|
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goto onError;
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|
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result = PyEval_CallObject(encoder, args);
|
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if (result == NULL)
|
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goto onError;
|
|
|
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if (!PyTuple_Check(result) ||
|
|
PyTuple_GET_SIZE(result) != 2) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"encoder must return a tuple (object, integer)");
|
|
goto onError;
|
|
}
|
|
v = PyTuple_GET_ITEM(result,0);
|
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Py_INCREF(v);
|
|
/* We don't check or use the second (integer) entry. */
|
|
|
|
Py_DECREF(args);
|
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Py_DECREF(encoder);
|
|
Py_DECREF(result);
|
|
return v;
|
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|
|
onError:
|
|
Py_XDECREF(result);
|
|
Py_XDECREF(args);
|
|
Py_XDECREF(encoder);
|
|
return NULL;
|
|
}
|
|
|
|
/* Decode an object (usually a Python string) using the given encoding
|
|
and return an equivalent object (e.g. an Unicode object).
|
|
|
|
errors is passed to the decoder factory as argument if non-NULL. */
|
|
|
|
PyObject *PyCodec_Decode(PyObject *object,
|
|
const char *encoding,
|
|
const char *errors)
|
|
{
|
|
PyObject *decoder = NULL;
|
|
PyObject *args = NULL, *result = NULL;
|
|
PyObject *v;
|
|
|
|
decoder = PyCodec_Decoder(encoding);
|
|
if (decoder == NULL)
|
|
goto onError;
|
|
|
|
args = args_tuple(object, errors);
|
|
if (args == NULL)
|
|
goto onError;
|
|
|
|
result = PyEval_CallObject(decoder,args);
|
|
if (result == NULL)
|
|
goto onError;
|
|
if (!PyTuple_Check(result) ||
|
|
PyTuple_GET_SIZE(result) != 2) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"decoder must return a tuple (object,integer)");
|
|
goto onError;
|
|
}
|
|
v = PyTuple_GET_ITEM(result,0);
|
|
Py_INCREF(v);
|
|
/* We don't check or use the second (integer) entry. */
|
|
|
|
Py_DECREF(args);
|
|
Py_DECREF(decoder);
|
|
Py_DECREF(result);
|
|
return v;
|
|
|
|
onError:
|
|
Py_XDECREF(args);
|
|
Py_XDECREF(decoder);
|
|
Py_XDECREF(result);
|
|
return NULL;
|
|
}
|
|
|
|
/* Register the error handling callback function error under the name
|
|
name. This function will be called by the codec when it encounters
|
|
an unencodable characters/undecodable bytes and doesn't know the
|
|
callback name, when name is specified as the error parameter
|
|
in the call to the encode/decode function.
|
|
Return 0 on success, -1 on error */
|
|
int PyCodec_RegisterError(const char *name, PyObject *error)
|
|
{
|
|
PyInterpreterState *interp = PyThreadState_GET()->interp;
|
|
if (interp->codec_search_path == NULL && _PyCodecRegistry_Init())
|
|
return -1;
|
|
if (!PyCallable_Check(error)) {
|
|
PyErr_SetString(PyExc_TypeError, "handler must be callable");
|
|
return -1;
|
|
}
|
|
return PyDict_SetItemString(interp->codec_error_registry,
|
|
(char *)name, error);
|
|
}
|
|
|
|
/* Lookup the error handling callback function registered under the
|
|
name error. As a special case NULL can be passed, in which case
|
|
the error handling callback for strict encoding will be returned. */
|
|
PyObject *PyCodec_LookupError(const char *name)
|
|
{
|
|
PyObject *handler = NULL;
|
|
|
|
PyInterpreterState *interp = PyThreadState_GET()->interp;
|
|
if (interp->codec_search_path == NULL && _PyCodecRegistry_Init())
|
|
return NULL;
|
|
|
|
if (name==NULL)
|
|
name = "strict";
|
|
handler = PyDict_GetItemString(interp->codec_error_registry, (char *)name);
|
|
if (!handler)
|
|
PyErr_Format(PyExc_LookupError, "unknown error handler name '%.400s'", name);
|
|
else
|
|
Py_INCREF(handler);
|
|
return handler;
|
|
}
|
|
|
|
static void wrong_exception_type(PyObject *exc)
|
|
{
|
|
_Py_IDENTIFIER(__class__);
|
|
_Py_IDENTIFIER(__name__);
|
|
PyObject *type = _PyObject_GetAttrId(exc, &PyId___class__);
|
|
if (type != NULL) {
|
|
PyObject *name = _PyObject_GetAttrId(type, &PyId___name__);
|
|
Py_DECREF(type);
|
|
if (name != NULL) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"don't know how to handle %S in error callback", name);
|
|
Py_DECREF(name);
|
|
}
|
|
}
|
|
}
|
|
|
|
PyObject *PyCodec_StrictErrors(PyObject *exc)
|
|
{
|
|
if (PyExceptionInstance_Check(exc))
|
|
PyErr_SetObject(PyExceptionInstance_Class(exc), exc);
|
|
else
|
|
PyErr_SetString(PyExc_TypeError, "codec must pass exception instance");
|
|
return NULL;
|
|
}
|
|
|
|
|
|
PyObject *PyCodec_IgnoreErrors(PyObject *exc)
|
|
{
|
|
Py_ssize_t end;
|
|
if (PyObject_IsInstance(exc, PyExc_UnicodeEncodeError)) {
|
|
if (PyUnicodeEncodeError_GetEnd(exc, &end))
|
|
return NULL;
|
|
}
|
|
else if (PyObject_IsInstance(exc, PyExc_UnicodeDecodeError)) {
|
|
if (PyUnicodeDecodeError_GetEnd(exc, &end))
|
|
return NULL;
|
|
}
|
|
else if (PyObject_IsInstance(exc, PyExc_UnicodeTranslateError)) {
|
|
if (PyUnicodeTranslateError_GetEnd(exc, &end))
|
|
return NULL;
|
|
}
|
|
else {
|
|
wrong_exception_type(exc);
|
|
return NULL;
|
|
}
|
|
return Py_BuildValue("(Nn)", PyUnicode_New(0, 0), end);
|
|
}
|
|
|
|
|
|
PyObject *PyCodec_ReplaceErrors(PyObject *exc)
|
|
{
|
|
Py_ssize_t start, end, i, len;
|
|
|
|
if (PyObject_IsInstance(exc, PyExc_UnicodeEncodeError)) {
|
|
PyObject *res;
|
|
int kind;
|
|
void *data;
|
|
if (PyUnicodeEncodeError_GetStart(exc, &start))
|
|
return NULL;
|
|
if (PyUnicodeEncodeError_GetEnd(exc, &end))
|
|
return NULL;
|
|
len = end - start;
|
|
res = PyUnicode_New(len, '?');
|
|
if (res == NULL)
|
|
return NULL;
|
|
kind = PyUnicode_KIND(res);
|
|
data = PyUnicode_DATA(res);
|
|
for (i = 0; i < len; ++i)
|
|
PyUnicode_WRITE(kind, data, i, '?');
|
|
return Py_BuildValue("(Nn)", res, end);
|
|
}
|
|
else if (PyObject_IsInstance(exc, PyExc_UnicodeDecodeError)) {
|
|
if (PyUnicodeDecodeError_GetEnd(exc, &end))
|
|
return NULL;
|
|
return Py_BuildValue("(Cn)",
|
|
(int)Py_UNICODE_REPLACEMENT_CHARACTER,
|
|
end);
|
|
}
|
|
else if (PyObject_IsInstance(exc, PyExc_UnicodeTranslateError)) {
|
|
PyObject *res;
|
|
int kind;
|
|
void *data;
|
|
if (PyUnicodeTranslateError_GetStart(exc, &start))
|
|
return NULL;
|
|
if (PyUnicodeTranslateError_GetEnd(exc, &end))
|
|
return NULL;
|
|
len = end - start;
|
|
res = PyUnicode_New(len, Py_UNICODE_REPLACEMENT_CHARACTER);
|
|
if (res == NULL)
|
|
return NULL;
|
|
kind = PyUnicode_KIND(res);
|
|
data = PyUnicode_DATA(res);
|
|
for (i=0; i < len; i++)
|
|
PyUnicode_WRITE(kind, data, i, Py_UNICODE_REPLACEMENT_CHARACTER);
|
|
return Py_BuildValue("(Nn)", res, end);
|
|
}
|
|
else {
|
|
wrong_exception_type(exc);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
PyObject *PyCodec_XMLCharRefReplaceErrors(PyObject *exc)
|
|
{
|
|
if (PyObject_IsInstance(exc, PyExc_UnicodeEncodeError)) {
|
|
PyObject *restuple;
|
|
PyObject *object;
|
|
Py_ssize_t i;
|
|
Py_ssize_t start;
|
|
Py_ssize_t end;
|
|
PyObject *res;
|
|
unsigned char *outp;
|
|
int ressize;
|
|
Py_UCS4 ch;
|
|
if (PyUnicodeEncodeError_GetStart(exc, &start))
|
|
return NULL;
|
|
if (PyUnicodeEncodeError_GetEnd(exc, &end))
|
|
return NULL;
|
|
if (!(object = PyUnicodeEncodeError_GetObject(exc)))
|
|
return NULL;
|
|
for (i = start, ressize = 0; i < end; ++i) {
|
|
/* object is guaranteed to be "ready" */
|
|
ch = PyUnicode_READ_CHAR(object, i);
|
|
if (ch<10)
|
|
ressize += 2+1+1;
|
|
else if (ch<100)
|
|
ressize += 2+2+1;
|
|
else if (ch<1000)
|
|
ressize += 2+3+1;
|
|
else if (ch<10000)
|
|
ressize += 2+4+1;
|
|
else if (ch<100000)
|
|
ressize += 2+5+1;
|
|
else if (ch<1000000)
|
|
ressize += 2+6+1;
|
|
else
|
|
ressize += 2+7+1;
|
|
}
|
|
/* allocate replacement */
|
|
res = PyUnicode_New(ressize, 127);
|
|
if (res == NULL) {
|
|
Py_DECREF(object);
|
|
return NULL;
|
|
}
|
|
outp = PyUnicode_1BYTE_DATA(res);
|
|
/* generate replacement */
|
|
for (i = start; i < end; ++i) {
|
|
int digits;
|
|
int base;
|
|
ch = PyUnicode_READ_CHAR(object, i);
|
|
*outp++ = '&';
|
|
*outp++ = '#';
|
|
if (ch<10) {
|
|
digits = 1;
|
|
base = 1;
|
|
}
|
|
else if (ch<100) {
|
|
digits = 2;
|
|
base = 10;
|
|
}
|
|
else if (ch<1000) {
|
|
digits = 3;
|
|
base = 100;
|
|
}
|
|
else if (ch<10000) {
|
|
digits = 4;
|
|
base = 1000;
|
|
}
|
|
else if (ch<100000) {
|
|
digits = 5;
|
|
base = 10000;
|
|
}
|
|
else if (ch<1000000) {
|
|
digits = 6;
|
|
base = 100000;
|
|
}
|
|
else {
|
|
digits = 7;
|
|
base = 1000000;
|
|
}
|
|
while (digits-->0) {
|
|
*outp++ = '0' + ch/base;
|
|
ch %= base;
|
|
base /= 10;
|
|
}
|
|
*outp++ = ';';
|
|
}
|
|
restuple = Py_BuildValue("(On)", res, end);
|
|
Py_DECREF(res);
|
|
Py_DECREF(object);
|
|
return restuple;
|
|
}
|
|
else {
|
|
wrong_exception_type(exc);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
PyObject *PyCodec_BackslashReplaceErrors(PyObject *exc)
|
|
{
|
|
if (PyObject_IsInstance(exc, PyExc_UnicodeEncodeError)) {
|
|
PyObject *restuple;
|
|
PyObject *object;
|
|
Py_ssize_t i;
|
|
Py_ssize_t start;
|
|
Py_ssize_t end;
|
|
PyObject *res;
|
|
unsigned char *outp;
|
|
int ressize;
|
|
Py_UCS4 c;
|
|
if (PyUnicodeEncodeError_GetStart(exc, &start))
|
|
return NULL;
|
|
if (PyUnicodeEncodeError_GetEnd(exc, &end))
|
|
return NULL;
|
|
if (!(object = PyUnicodeEncodeError_GetObject(exc)))
|
|
return NULL;
|
|
for (i = start, ressize = 0; i < end; ++i) {
|
|
/* object is guaranteed to be "ready" */
|
|
c = PyUnicode_READ_CHAR(object, i);
|
|
if (c >= 0x10000) {
|
|
ressize += 1+1+8;
|
|
}
|
|
else if (c >= 0x100) {
|
|
ressize += 1+1+4;
|
|
}
|
|
else
|
|
ressize += 1+1+2;
|
|
}
|
|
res = PyUnicode_New(ressize, 127);
|
|
if (res==NULL)
|
|
return NULL;
|
|
for (i = start, outp = PyUnicode_1BYTE_DATA(res);
|
|
i < end; ++i) {
|
|
c = PyUnicode_READ_CHAR(object, i);
|
|
*outp++ = '\\';
|
|
if (c >= 0x00010000) {
|
|
*outp++ = 'U';
|
|
*outp++ = Py_hexdigits[(c>>28)&0xf];
|
|
*outp++ = Py_hexdigits[(c>>24)&0xf];
|
|
*outp++ = Py_hexdigits[(c>>20)&0xf];
|
|
*outp++ = Py_hexdigits[(c>>16)&0xf];
|
|
*outp++ = Py_hexdigits[(c>>12)&0xf];
|
|
*outp++ = Py_hexdigits[(c>>8)&0xf];
|
|
}
|
|
else if (c >= 0x100) {
|
|
*outp++ = 'u';
|
|
*outp++ = Py_hexdigits[(c>>12)&0xf];
|
|
*outp++ = Py_hexdigits[(c>>8)&0xf];
|
|
}
|
|
else
|
|
*outp++ = 'x';
|
|
*outp++ = Py_hexdigits[(c>>4)&0xf];
|
|
*outp++ = Py_hexdigits[c&0xf];
|
|
}
|
|
|
|
restuple = Py_BuildValue("(On)", res, end);
|
|
Py_DECREF(res);
|
|
Py_DECREF(object);
|
|
return restuple;
|
|
}
|
|
else {
|
|
wrong_exception_type(exc);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* This handler is declared static until someone demonstrates
|
|
a need to call it directly. */
|
|
static PyObject *
|
|
PyCodec_SurrogatePassErrors(PyObject *exc)
|
|
{
|
|
PyObject *restuple;
|
|
PyObject *object;
|
|
Py_ssize_t i;
|
|
Py_ssize_t start;
|
|
Py_ssize_t end;
|
|
PyObject *res;
|
|
if (PyObject_IsInstance(exc, PyExc_UnicodeEncodeError)) {
|
|
char *outp;
|
|
if (PyUnicodeEncodeError_GetStart(exc, &start))
|
|
return NULL;
|
|
if (PyUnicodeEncodeError_GetEnd(exc, &end))
|
|
return NULL;
|
|
if (!(object = PyUnicodeEncodeError_GetObject(exc)))
|
|
return NULL;
|
|
res = PyBytes_FromStringAndSize(NULL, 3*(end-start));
|
|
if (!res) {
|
|
Py_DECREF(object);
|
|
return NULL;
|
|
}
|
|
outp = PyBytes_AsString(res);
|
|
for (i = start; i < end; i++) {
|
|
/* object is guaranteed to be "ready" */
|
|
Py_UCS4 ch = PyUnicode_READ_CHAR(object, i);
|
|
if (ch < 0xd800 || ch > 0xdfff) {
|
|
/* Not a surrogate, fail with original exception */
|
|
PyErr_SetObject(PyExceptionInstance_Class(exc), exc);
|
|
Py_DECREF(res);
|
|
Py_DECREF(object);
|
|
return NULL;
|
|
}
|
|
*outp++ = (char)(0xe0 | (ch >> 12));
|
|
*outp++ = (char)(0x80 | ((ch >> 6) & 0x3f));
|
|
*outp++ = (char)(0x80 | (ch & 0x3f));
|
|
}
|
|
restuple = Py_BuildValue("(On)", res, end);
|
|
Py_DECREF(res);
|
|
Py_DECREF(object);
|
|
return restuple;
|
|
}
|
|
else if (PyObject_IsInstance(exc, PyExc_UnicodeDecodeError)) {
|
|
unsigned char *p;
|
|
Py_UCS4 ch = 0;
|
|
if (PyUnicodeDecodeError_GetStart(exc, &start))
|
|
return NULL;
|
|
if (!(object = PyUnicodeDecodeError_GetObject(exc)))
|
|
return NULL;
|
|
if (!(p = (unsigned char*)PyBytes_AsString(object))) {
|
|
Py_DECREF(object);
|
|
return NULL;
|
|
}
|
|
/* Try decoding a single surrogate character. If
|
|
there are more, let the codec call us again. */
|
|
p += start;
|
|
if ((p[0] & 0xf0) == 0xe0 ||
|
|
(p[1] & 0xc0) == 0x80 ||
|
|
(p[2] & 0xc0) == 0x80) {
|
|
/* it's a three-byte code */
|
|
ch = ((p[0] & 0x0f) << 12) + ((p[1] & 0x3f) << 6) + (p[2] & 0x3f);
|
|
if (ch < 0xd800 || ch > 0xdfff)
|
|
/* it's not a surrogate - fail */
|
|
ch = 0;
|
|
}
|
|
Py_DECREF(object);
|
|
if (ch == 0) {
|
|
PyErr_SetObject(PyExceptionInstance_Class(exc), exc);
|
|
return NULL;
|
|
}
|
|
res = PyUnicode_FromOrdinal(ch);
|
|
if (res == NULL)
|
|
return NULL;
|
|
return Py_BuildValue("(Nn)", res, start+3);
|
|
}
|
|
else {
|
|
wrong_exception_type(exc);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static PyObject *
|
|
PyCodec_SurrogateEscapeErrors(PyObject *exc)
|
|
{
|
|
PyObject *restuple;
|
|
PyObject *object;
|
|
Py_ssize_t i;
|
|
Py_ssize_t start;
|
|
Py_ssize_t end;
|
|
PyObject *res;
|
|
if (PyObject_IsInstance(exc, PyExc_UnicodeEncodeError)) {
|
|
char *outp;
|
|
if (PyUnicodeEncodeError_GetStart(exc, &start))
|
|
return NULL;
|
|
if (PyUnicodeEncodeError_GetEnd(exc, &end))
|
|
return NULL;
|
|
if (!(object = PyUnicodeEncodeError_GetObject(exc)))
|
|
return NULL;
|
|
res = PyBytes_FromStringAndSize(NULL, end-start);
|
|
if (!res) {
|
|
Py_DECREF(object);
|
|
return NULL;
|
|
}
|
|
outp = PyBytes_AsString(res);
|
|
for (i = start; i < end; i++) {
|
|
/* object is guaranteed to be "ready" */
|
|
Py_UCS4 ch = PyUnicode_READ_CHAR(object, i);
|
|
if (ch < 0xdc80 || ch > 0xdcff) {
|
|
/* Not a UTF-8b surrogate, fail with original exception */
|
|
PyErr_SetObject(PyExceptionInstance_Class(exc), exc);
|
|
Py_DECREF(res);
|
|
Py_DECREF(object);
|
|
return NULL;
|
|
}
|
|
*outp++ = ch - 0xdc00;
|
|
}
|
|
restuple = Py_BuildValue("(On)", res, end);
|
|
Py_DECREF(res);
|
|
Py_DECREF(object);
|
|
return restuple;
|
|
}
|
|
else if (PyObject_IsInstance(exc, PyExc_UnicodeDecodeError)) {
|
|
PyObject *str;
|
|
unsigned char *p;
|
|
Py_UCS2 ch[4]; /* decode up to 4 bad bytes. */
|
|
int consumed = 0;
|
|
if (PyUnicodeDecodeError_GetStart(exc, &start))
|
|
return NULL;
|
|
if (PyUnicodeDecodeError_GetEnd(exc, &end))
|
|
return NULL;
|
|
if (!(object = PyUnicodeDecodeError_GetObject(exc)))
|
|
return NULL;
|
|
if (!(p = (unsigned char*)PyBytes_AsString(object))) {
|
|
Py_DECREF(object);
|
|
return NULL;
|
|
}
|
|
while (consumed < 4 && consumed < end-start) {
|
|
/* Refuse to escape ASCII bytes. */
|
|
if (p[start+consumed] < 128)
|
|
break;
|
|
ch[consumed] = 0xdc00 + p[start+consumed];
|
|
consumed++;
|
|
}
|
|
Py_DECREF(object);
|
|
if (!consumed) {
|
|
/* codec complained about ASCII byte. */
|
|
PyErr_SetObject(PyExceptionInstance_Class(exc), exc);
|
|
return NULL;
|
|
}
|
|
str = PyUnicode_FromKindAndData(PyUnicode_2BYTE_KIND, ch, consumed);
|
|
if (str == NULL)
|
|
return NULL;
|
|
return Py_BuildValue("(Nn)", str, start+consumed);
|
|
}
|
|
else {
|
|
wrong_exception_type(exc);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
|
|
static PyObject *strict_errors(PyObject *self, PyObject *exc)
|
|
{
|
|
return PyCodec_StrictErrors(exc);
|
|
}
|
|
|
|
|
|
static PyObject *ignore_errors(PyObject *self, PyObject *exc)
|
|
{
|
|
return PyCodec_IgnoreErrors(exc);
|
|
}
|
|
|
|
|
|
static PyObject *replace_errors(PyObject *self, PyObject *exc)
|
|
{
|
|
return PyCodec_ReplaceErrors(exc);
|
|
}
|
|
|
|
|
|
static PyObject *xmlcharrefreplace_errors(PyObject *self, PyObject *exc)
|
|
{
|
|
return PyCodec_XMLCharRefReplaceErrors(exc);
|
|
}
|
|
|
|
|
|
static PyObject *backslashreplace_errors(PyObject *self, PyObject *exc)
|
|
{
|
|
return PyCodec_BackslashReplaceErrors(exc);
|
|
}
|
|
|
|
static PyObject *surrogatepass_errors(PyObject *self, PyObject *exc)
|
|
{
|
|
return PyCodec_SurrogatePassErrors(exc);
|
|
}
|
|
|
|
static PyObject *surrogateescape_errors(PyObject *self, PyObject *exc)
|
|
{
|
|
return PyCodec_SurrogateEscapeErrors(exc);
|
|
}
|
|
|
|
static int _PyCodecRegistry_Init(void)
|
|
{
|
|
static struct {
|
|
char *name;
|
|
PyMethodDef def;
|
|
} methods[] =
|
|
{
|
|
{
|
|
"strict",
|
|
{
|
|
"strict_errors",
|
|
strict_errors,
|
|
METH_O,
|
|
PyDoc_STR("Implements the 'strict' error handling, which "
|
|
"raises a UnicodeError on coding errors.")
|
|
}
|
|
},
|
|
{
|
|
"ignore",
|
|
{
|
|
"ignore_errors",
|
|
ignore_errors,
|
|
METH_O,
|
|
PyDoc_STR("Implements the 'ignore' error handling, which "
|
|
"ignores malformed data and continues.")
|
|
}
|
|
},
|
|
{
|
|
"replace",
|
|
{
|
|
"replace_errors",
|
|
replace_errors,
|
|
METH_O,
|
|
PyDoc_STR("Implements the 'replace' error handling, which "
|
|
"replaces malformed data with a replacement marker.")
|
|
}
|
|
},
|
|
{
|
|
"xmlcharrefreplace",
|
|
{
|
|
"xmlcharrefreplace_errors",
|
|
xmlcharrefreplace_errors,
|
|
METH_O,
|
|
PyDoc_STR("Implements the 'xmlcharrefreplace' error handling, "
|
|
"which replaces an unencodable character with the "
|
|
"appropriate XML character reference.")
|
|
}
|
|
},
|
|
{
|
|
"backslashreplace",
|
|
{
|
|
"backslashreplace_errors",
|
|
backslashreplace_errors,
|
|
METH_O,
|
|
PyDoc_STR("Implements the 'backslashreplace' error handling, "
|
|
"which replaces an unencodable character with a "
|
|
"backslashed escape sequence.")
|
|
}
|
|
},
|
|
{
|
|
"surrogatepass",
|
|
{
|
|
"surrogatepass",
|
|
surrogatepass_errors,
|
|
METH_O
|
|
}
|
|
},
|
|
{
|
|
"surrogateescape",
|
|
{
|
|
"surrogateescape",
|
|
surrogateescape_errors,
|
|
METH_O
|
|
}
|
|
}
|
|
};
|
|
|
|
PyInterpreterState *interp = PyThreadState_GET()->interp;
|
|
PyObject *mod;
|
|
unsigned i;
|
|
|
|
if (interp->codec_search_path != NULL)
|
|
return 0;
|
|
|
|
interp->codec_search_path = PyList_New(0);
|
|
interp->codec_search_cache = PyDict_New();
|
|
interp->codec_error_registry = PyDict_New();
|
|
|
|
if (interp->codec_error_registry) {
|
|
for (i = 0; i < Py_ARRAY_LENGTH(methods); ++i) {
|
|
PyObject *func = PyCFunction_New(&methods[i].def, NULL);
|
|
int res;
|
|
if (!func)
|
|
Py_FatalError("can't initialize codec error registry");
|
|
res = PyCodec_RegisterError(methods[i].name, func);
|
|
Py_DECREF(func);
|
|
if (res)
|
|
Py_FatalError("can't initialize codec error registry");
|
|
}
|
|
}
|
|
|
|
if (interp->codec_search_path == NULL ||
|
|
interp->codec_search_cache == NULL ||
|
|
interp->codec_error_registry == NULL)
|
|
Py_FatalError("can't initialize codec registry");
|
|
|
|
mod = PyImport_ImportModuleNoBlock("encodings");
|
|
if (mod == NULL) {
|
|
return -1;
|
|
}
|
|
Py_DECREF(mod);
|
|
interp->codecs_initialized = 1;
|
|
return 0;
|
|
}
|