Merge with 1.25 of PyXML:
Participate in garbage collection if available. Potentially decref handlers in clear_handlers. Partially reindent. Put synthetic frame object on the stack to support better error output. Expose Python codecs to pyexpat. Add new Expat 1.2 handlers and API. Fix memory leak: release self->handlers. Do not expect PyModule_AddObject and PyModule_AddStringConstant in 2.0b1. Raise exception in ParseFile.
This commit is contained in:
Martin v. Löwis
parent
172c40b20a
commit
0078f6cc80
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@ -1,10 +1,28 @@
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#include "Python.h"
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#include "compile.h"
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#include "frameobject.h"
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#ifdef HAVE_EXPAT_H
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#include "expat.h"
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#else
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#include "xmlparse.h"
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#endif
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#ifdef XML_MAJOR_VERSION
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#define EXPAT_VERSION (0x10000*XML_MAJOR_VERSION+0x100*XML_MINOR_VERSION+XML_MINOR_VERSION)
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#else
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#ifndef EXPAT_VERSION
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/* Assume Expat 1.1 unless told otherwise */
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#define EXPAT_VERSION 0x010100
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#endif
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#endif
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#ifndef PyGC_HEAD_SIZE
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#define PyGC_HEAD_SIZE 0
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#define PyObject_GC_Init(x)
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#define PyObject_GC_Fini(m)
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#define Py_TPFLAGS_GC 0
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#endif
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enum HandlerTypes {
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StartElement,
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EndElement,
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@ -20,7 +38,11 @@ enum HandlerTypes {
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Default,
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DefaultHandlerExpand,
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NotStandalone,
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ExternalEntityRef
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ExternalEntityRef,
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StartDoctypeDecl,
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EndDoctypeDecl,
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ExternalParsedEntityDecl,
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InternalParsedEntityDecl
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};
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static PyObject *ErrorObject;
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@ -47,6 +69,7 @@ struct HandlerInfo {
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const char *name;
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xmlhandlersetter setter;
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xmlhandler handler;
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PyCodeObject *tb_code;
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};
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staticforward struct HandlerInfo handler_info[64];
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@ -198,12 +221,82 @@ conv_string_len_to_utf8(const XML_Char *str, int len)
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/* Callback routines */
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static void clear_handlers(xmlparseobject *self);
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static void clear_handlers(xmlparseobject *self, int decref);
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static void
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flag_error(xmlparseobject *self)
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{
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clear_handlers(self);
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clear_handlers(self, 1);
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}
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static PyCodeObject*
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getcode(enum HandlerTypes slot, char* func_name, int lineno)
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{
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PyObject *code = NULL;
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PyObject *name = NULL;
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PyObject *nulltuple = NULL;
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PyObject *filename = NULL;
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if (handler_info[slot].tb_code == NULL) {
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code = PyString_FromString("");
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if (code == NULL)
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goto failed;
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name = PyString_FromString(func_name);
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if (name == NULL)
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goto failed;
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nulltuple = PyTuple_New(0);
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if (nulltuple == NULL)
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goto failed;
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filename = PyString_FromString("pyexpat.c");
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handler_info[slot].tb_code = PyCode_New(
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0, /* argcount */
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0, /* nlocals */
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0, /* stacksize */
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0, /* flags */
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code, /* code */
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nulltuple, /* consts */
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nulltuple, /* names */
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nulltuple, /* varnames */
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filename, /* filename */
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name, /* name */
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lineno, /* firstlineno */
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code /* lnotab */
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);
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if (handler_info[slot].tb_code == NULL)
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goto failed;
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Py_DECREF(code);
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Py_DECREF(nulltuple);
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Py_DECREF(filename);
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Py_DECREF(name);
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}
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return handler_info[slot].tb_code;
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failed:
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Py_XDECREF(code);
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Py_XDECREF(name);
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return NULL;
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}
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static PyObject*
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call_with_frame(PyCodeObject *c, PyObject* func, PyObject* args)
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{
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PyThreadState *tstate = PyThreadState_GET();
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PyFrameObject *f;
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PyObject *res;
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if (c == NULL)
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return NULL;
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f = PyFrame_New(
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tstate, /*back*/
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c, /*code*/
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tstate->frame->f_globals, /*globals*/
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NULL); /*locals*/
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if (f == NULL)
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return NULL;
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tstate->frame = f;
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res = PyEval_CallObject(func, args);
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if (res == NULL && tstate->curexc_traceback == NULL)
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PyTraceBack_Here(f);
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tstate->frame = f->f_back;
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Py_DECREF(f);
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return res;
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}
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#define RC_HANDLER(RC, NAME, PARAMS, INIT, PARAM_FORMAT, CONVERSION, \
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@ -219,7 +312,7 @@ static RC my_##NAME##Handler PARAMS {\
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&& self->handlers[NAME] != Py_None) { \
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args = Py_BuildValue PARAM_FORMAT ;\
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if (!args) return RETURN; \
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rv = PyEval_CallObject(self->handlers[NAME], args); \
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rv = call_with_frame(getcode(NAME,#NAME,__LINE__),self->handlers[NAME], args); \
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Py_DECREF(args); \
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if (rv == NULL) { \
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flag_error(self); \
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@ -369,7 +462,31 @@ RC_HANDLER(int, ExternalEntityRef,
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rc = PyInt_AsLong(rv);, rc,
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XML_GetUserData(parser))
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/* XXX UnknownEncodingHandler */
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#if EXPAT_VERSION >= 0x010200
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VOID_HANDLER(StartDoctypeDecl,
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(void *userData, const XML_Char *doctypeName),
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("(O&)", STRING_CONV_FUNC, doctypeName))
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VOID_HANDLER(EndDoctypeDecl, (void *userData), ("()"))
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VOID_HANDLER(ExternalParsedEntityDecl,
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(void *userData, const XML_Char *entityName,
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const XML_Char *base, const XML_Char *systemId,
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const XML_Char *publicId),
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("(O&O&O&O&)", STRING_CONV_FUNC, entityName,
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STRING_CONV_FUNC, base, STRING_CONV_FUNC, systemId,
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STRING_CONV_FUNC, publicId))
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VOID_HANDLER(InternalParsedEntityDecl,
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(void *userData, const XML_Char *entityName,
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const XML_Char *replacementText, int replacementTextLength),
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("(O&O&i)", STRING_CONV_FUNC, entityName,
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STRING_CONV_FUNC, replacementText, replacementTextLength))
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#endif /* EXPAT_VERSION >= 0x010200 */
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/* ---------------------------------------------------------------- */
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@ -500,6 +617,13 @@ xmlparse_ParseFile(xmlparseobject *self, PyObject *args)
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if (!rv || bytes_read == 0)
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break;
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}
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if (rv == 0) {
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PyErr_Format(ErrorObject, "%.200s: line %i, column %i",
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XML_ErrorString(XML_GetErrorCode(self->itself)),
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XML_GetErrorLineNumber(self->itself),
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XML_GetErrorColumnNumber(self->itself));
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return NULL;
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}
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return Py_BuildValue("i", rv);
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}
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@ -569,7 +693,10 @@ xmlparse_ExternalEntityParserCreate(xmlparseobject *self, PyObject *args)
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new_parser->itself = XML_ExternalEntityParserCreate(self->itself, context,
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encoding);
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if (!new_parser) {
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new_parser->handlers = 0;
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PyObject_GC_Init(new_parser);
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if (!new_parser->itself) {
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Py_DECREF(new_parser);
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return PyErr_NoMemory();
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}
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@ -581,7 +708,11 @@ xmlparse_ExternalEntityParserCreate(xmlparseobject *self, PyObject *args)
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/* do nothing */;
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new_parser->handlers = malloc(sizeof(PyObject *)*i);
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clear_handlers(new_parser);
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if (!new_parser->handlers) {
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Py_DECREF(new_parser);
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return PyErr_NoMemory();
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}
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clear_handlers(new_parser, 0);
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/* then copy handlers from self */
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for (i = 0; handler_info[i].name != NULL; i++) {
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@ -596,7 +727,28 @@ xmlparse_ExternalEntityParserCreate(xmlparseobject *self, PyObject *args)
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return (PyObject *)new_parser;
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}
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#if EXPAT_VERSION >= 0x010200
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static char xmlparse_SetParamEntityParsing__doc__[] =
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"SetParamEntityParsing(flag) -> success\n\
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Controls parsing of parameter entities (including the external DTD\n\
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subset). Possible flag values are XML_PARAM_ENTITY_PARSING_NEVER,\n\
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XML_PARAM_ENTITY_PARSING_UNLESS_STANDALONE and\n\
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XML_PARAM_ENTITY_PARSING_ALWAYS. Returns true if setting the flag\n\
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was successful.";
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static PyObject*
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xmlparse_SetParamEntityParsing(PyObject *p, PyObject* args)
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{
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int flag;
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if (!PyArg_ParseTuple(args, "i", &flag))
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return NULL;
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flag = XML_SetParamEntityParsing(((xmlparseobject*)p)->itself,
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flag);
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return PyInt_FromLong(flag);
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}
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#endif /* EXPAT_VERSION >= 0x010200 */
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static struct PyMethodDef xmlparse_methods[] = {
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{"Parse", (PyCFunction)xmlparse_Parse,
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@ -609,13 +761,72 @@ static struct PyMethodDef xmlparse_methods[] = {
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METH_VARARGS, xmlparse_GetBase__doc__},
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{"ExternalEntityParserCreate", (PyCFunction)xmlparse_ExternalEntityParserCreate,
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METH_VARARGS, xmlparse_ExternalEntityParserCreate__doc__},
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#if EXPAT_VERSION >= 0x010200
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{"SetParamEntityParsing", xmlparse_SetParamEntityParsing,
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METH_VARARGS, xmlparse_SetParamEntityParsing__doc__},
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#endif
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{NULL, NULL} /* sentinel */
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};
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/* ---------- */
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static xmlparseobject *
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#if !(PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6)
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/*
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pyexpat international encoding support.
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Make it as simple as possible.
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*/
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static char template_buffer[256];
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PyObject * template_string=NULL;
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static void
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init_template_buffer(void)
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{
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int i;
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for (i=0;i<256;i++) {
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template_buffer[i]=i;
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};
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template_buffer[256]=0;
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};
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int
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PyUnknownEncodingHandler(void *encodingHandlerData,
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const XML_Char *name,
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XML_Encoding * info)
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{
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PyUnicodeObject * _u_string=NULL;
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int result=0;
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int i;
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_u_string=(PyUnicodeObject *) PyUnicode_Decode(template_buffer, 256, name, "replace"); // Yes, supports only 8bit encodings
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if (_u_string==NULL) {
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return result;
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};
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for (i=0; i<256; i++) {
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Py_UNICODE c = _u_string->str[i] ; // Stupid to access directly, but fast
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if (c==Py_UNICODE_REPLACEMENT_CHARACTER) {
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info->map[i] = -1;
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} else {
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info->map[i] = c;
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};
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};
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info->data = NULL;
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info->convert = NULL;
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info->release = NULL;
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result=1;
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Py_DECREF(_u_string);
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return result;
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}
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#endif
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static PyObject *
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newxmlparseobject(char *encoding, char *namespace_separator)
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{
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int i;
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@ -635,12 +846,14 @@ newxmlparseobject(char *encoding, char *namespace_separator)
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self->returns_unicode = 1;
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#endif
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self->handlers = NULL;
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if (namespace_separator) {
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self->itself = XML_ParserCreateNS(encoding, *namespace_separator);
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}
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else{
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self->itself = XML_ParserCreate(encoding);
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}
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PyObject_GC_Init(self);
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if (self->itself == NULL) {
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PyErr_SetString(PyExc_RuntimeError,
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"XML_ParserCreate failed");
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@ -648,14 +861,22 @@ newxmlparseobject(char *encoding, char *namespace_separator)
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return NULL;
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}
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XML_SetUserData(self->itself, (void *)self);
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#if PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6
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#else
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XML_SetUnknownEncodingHandler(self->itself, (XML_UnknownEncodingHandler) PyUnknownEncodingHandler, NULL);
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#endif
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for(i = 0; handler_info[i].name != NULL; i++)
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/* do nothing */;
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self->handlers = malloc(sizeof(PyObject *)*i);
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clear_handlers(self);
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if (!self->handlers){
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Py_DECREF(self);
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return PyErr_NoMemory();
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}
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clear_handlers(self, 0);
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return self;
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return (PyObject*)self;
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}
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@ -663,13 +884,17 @@ static void
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xmlparse_dealloc(xmlparseobject *self)
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{
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int i;
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PyObject_GC_Fini(self);
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if (self->itself)
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XML_ParserFree(self->itself);
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self->itself = NULL;
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|
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if(self->handlers){
|
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for (i=0; handler_info[i].name != NULL; i++) {
|
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Py_XDECREF(self->handlers[i]);
|
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}
|
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free (self->handlers);
|
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}
|
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#if PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6
|
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/* Code for versions before 1.6 */
|
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free(self);
|
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|
|
@ -781,6 +1006,29 @@ xmlparse_setattr(xmlparseobject *self, char *name, PyObject *v)
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return -1;
|
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}
|
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|
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#ifdef WITH_CYCLE_GC
|
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static int
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xmlparse_traverse(xmlparseobject *op, visitproc visit, void *arg)
|
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{
|
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int i, err;
|
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for (i = 0; handler_info[i].name != NULL; i++) {
|
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if (!op->handlers[i])
|
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continue;
|
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err = visit(op->handlers[i], arg);
|
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if (err)
|
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return err;
|
||||
}
|
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return 0;
|
||||
}
|
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|
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static int
|
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xmlparse_clear(xmlparseobject *op)
|
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{
|
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clear_handlers(op, 1);
|
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return 0;
|
||||
}
|
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#endif
|
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|
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static char Xmlparsetype__doc__[] =
|
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"XML parser";
|
||||
|
||||
|
|
@ -788,7 +1036,7 @@ static PyTypeObject Xmlparsetype = {
|
|||
PyObject_HEAD_INIT(NULL)
|
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0, /*ob_size*/
|
||||
"xmlparser", /*tp_name*/
|
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sizeof(xmlparseobject), /*tp_basicsize*/
|
||||
sizeof(xmlparseobject) + PyGC_HEAD_SIZE,/*tp_basicsize*/
|
||||
0, /*tp_itemsize*/
|
||||
/* methods */
|
||||
(destructor)xmlparse_dealloc, /*tp_dealloc*/
|
||||
|
|
@ -803,16 +1051,22 @@ static PyTypeObject Xmlparsetype = {
|
|||
(hashfunc)0, /*tp_hash*/
|
||||
(ternaryfunc)0, /*tp_call*/
|
||||
(reprfunc)0, /*tp_str*/
|
||||
|
||||
/* Space for future expansion */
|
||||
0L,0L,0L,0L,
|
||||
Xmlparsetype__doc__ /* Documentation string */
|
||||
0, /* tp_getattro */
|
||||
0, /* tp_setattro */
|
||||
0, /* tp_as_buffer */
|
||||
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_GC, /*tp_flags*/
|
||||
Xmlparsetype__doc__, /* Documentation string */
|
||||
#ifdef WITH_CYCLE_GC
|
||||
(traverseproc)xmlparse_traverse, /* tp_traverse */
|
||||
(inquiry)xmlparse_clear /* tp_clear */
|
||||
#else
|
||||
0, 0
|
||||
#endif
|
||||
};
|
||||
|
||||
/* End of code for xmlparser objects */
|
||||
/* -------------------------------------------------------- */
|
||||
|
||||
|
||||
static char pyexpat_ParserCreate__doc__[] =
|
||||
"ParserCreate([encoding[, namespace_separator]]) -> parser\n\
|
||||
Return a new XML parser object.";
|
||||
|
|
@ -834,7 +1088,7 @@ pyexpat_ParserCreate(PyObject *notused, PyObject *args, PyObject *kw)
|
|||
" omitted, or None");
|
||||
return NULL;
|
||||
}
|
||||
return (PyObject *)newxmlparseobject(encoding, namespace_separator);
|
||||
return newxmlparseobject(encoding, namespace_separator);
|
||||
}
|
||||
|
||||
static char pyexpat_ErrorString__doc__[] =
|
||||
|
|
@ -871,7 +1125,7 @@ static char pyexpat_module_documentation[] =
|
|||
|
||||
void initpyexpat(void); /* avoid compiler warnings */
|
||||
|
||||
#if PY_VERSION_HEX < 0x2000000
|
||||
#if PY_VERSION_HEX < 0x20000F0
|
||||
|
||||
/* 1.5 compatibility: PyModule_AddObject */
|
||||
static int
|
||||
|
|
@ -889,6 +1143,12 @@ PyModule_AddObject(PyObject *m, char *name, PyObject *o)
|
|||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
PyModule_AddIntConstant(PyObject *m, char *name, long value)
|
||||
{
|
||||
return PyModule_AddObject(m, name, PyInt_FromLong(value));
|
||||
}
|
||||
|
||||
static int
|
||||
PyModule_AddStringConstant(PyObject *m, char *name, char *value)
|
||||
{
|
||||
|
|
@ -934,6 +1194,10 @@ initpyexpat(void)
|
|||
XML_MINOR_VERSION, XML_MICRO_VERSION));
|
||||
#endif
|
||||
|
||||
#if PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6
|
||||
#else
|
||||
init_template_buffer();
|
||||
#endif
|
||||
/* XXX When Expat supports some way of figuring out how it was
|
||||
compiled, this should check and set native_encoding
|
||||
appropriately.
|
||||
|
|
@ -981,15 +1245,32 @@ initpyexpat(void)
|
|||
MYCONST(XML_ERROR_MISPLACED_XML_PI);
|
||||
MYCONST(XML_ERROR_UNKNOWN_ENCODING);
|
||||
MYCONST(XML_ERROR_INCORRECT_ENCODING);
|
||||
MYCONST(XML_ERROR_UNCLOSED_CDATA_SECTION);
|
||||
MYCONST(XML_ERROR_EXTERNAL_ENTITY_HANDLING);
|
||||
MYCONST(XML_ERROR_NOT_STANDALONE);
|
||||
|
||||
#undef MYCONST
|
||||
#define MYCONST(c) PyModule_AddIntConstant(m, #c, c)
|
||||
|
||||
#if EXPAT_VERSION >= 0x010200
|
||||
MYCONST(XML_PARAM_ENTITY_PARSING_NEVER);
|
||||
MYCONST(XML_PARAM_ENTITY_PARSING_UNLESS_STANDALONE);
|
||||
MYCONST(XML_PARAM_ENTITY_PARSING_ALWAYS);
|
||||
#endif
|
||||
|
||||
#undef MYCONST
|
||||
|
||||
}
|
||||
|
||||
static void
|
||||
clear_handlers(xmlparseobject *self)
|
||||
clear_handlers(xmlparseobject *self, int decref)
|
||||
{
|
||||
int i = 0;
|
||||
|
||||
for (; handler_info[i].name!=NULL; i++) {
|
||||
if (decref){
|
||||
Py_XDECREF(self->handlers[i]);
|
||||
}
|
||||
self->handlers[i]=NULL;
|
||||
handler_info[i].setter(self->itself, NULL);
|
||||
}
|
||||
|
|
@ -1065,6 +1346,26 @@ pyxml_SetEndCdataSection(XML_Parser *parser, void *junk)
|
|||
(pairsetter)XML_SetCdataSectionHandler);
|
||||
}
|
||||
|
||||
#if EXPAT_VERSION >= 0x010200
|
||||
|
||||
static void
|
||||
pyxml_SetStartDoctypeDeclHandler(XML_Parser *parser, void *junk)
|
||||
{
|
||||
pyxml_UpdatePairedHandlers((xmlparseobject *)XML_GetUserData(parser),
|
||||
StartDoctypeDecl, EndDoctypeDecl,
|
||||
(pairsetter)XML_SetDoctypeDeclHandler);
|
||||
}
|
||||
|
||||
static void
|
||||
pyxml_SetEndDoctypeDeclHandler(XML_Parser *parser, void *junk)
|
||||
{
|
||||
pyxml_UpdatePairedHandlers((xmlparseobject *)XML_GetUserData(parser),
|
||||
StartDoctypeDecl, EndDoctypeDecl,
|
||||
(pairsetter)XML_SetDoctypeDeclHandler);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
statichere struct HandlerInfo handler_info[] = {
|
||||
{"StartElementHandler",
|
||||
pyxml_SetStartElementHandler,
|
||||
|
|
@ -1111,6 +1412,20 @@ statichere struct HandlerInfo handler_info[] = {
|
|||
{"ExternalEntityRefHandler",
|
||||
(xmlhandlersetter)XML_SetExternalEntityRefHandler,
|
||||
(xmlhandler)my_ExternalEntityRefHandler },
|
||||
#if EXPAT_VERSION >= 0x010200
|
||||
{"StartDoctypeDeclHandler",
|
||||
pyxml_SetStartDoctypeDeclHandler,
|
||||
(xmlhandler)my_StartDoctypeDeclHandler},
|
||||
{"EndDoctypeDeclHandler",
|
||||
pyxml_SetEndDoctypeDeclHandler,
|
||||
(xmlhandler)my_EndDoctypeDeclHandler},
|
||||
{"ExternalParsedEntityDeclHandler",
|
||||
(xmlhandlersetter)XML_SetExternalParsedEntityDeclHandler,
|
||||
(xmlhandler)my_ExternalParsedEntityDeclHandler},
|
||||
{"InternalParsedEntityDeclHandler",
|
||||
(xmlhandlersetter)XML_SetInternalParsedEntityDeclHandler,
|
||||
(xmlhandler)my_InternalParsedEntityDeclHandler},
|
||||
#endif /* EXPAT_VERSION >=0x010200 */
|
||||
|
||||
{NULL, NULL, NULL} /* sentinel */
|
||||
};
|
||||
|
|
|
|||
Loading…
Reference in New Issue