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cpython/Modules/pyexpat.c

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#include "Python.h"
#include "compile.h"
#include "frameobject.h"
#ifdef HAVE_EXPAT_H
#include "expat.h"
#else
#include "xmlparse.h"
#endif
#ifdef XML_MAJOR_VERSION
#define EXPAT_VERSION (0x10000*XML_MAJOR_VERSION+0x100*XML_MINOR_VERSION+XML_MICRO_VERSION)
#else
#ifndef EXPAT_VERSION
/* Assume Expat 1.1 unless told otherwise */
#define EXPAT_VERSION 0x010100
#endif
#endif
#ifndef PyGC_HEAD_SIZE
#define PyGC_HEAD_SIZE 0
#define PyObject_GC_Init(x)
#define PyObject_GC_Fini(m)
#define Py_TPFLAGS_GC 0
#endif
enum HandlerTypes {
StartElement,
EndElement,
ProcessingInstruction,
CharacterData,
UnparsedEntityDecl,
NotationDecl,
StartNamespaceDecl,
EndNamespaceDecl,
Comment,
StartCdataSection,
EndCdataSection,
Default,
DefaultHandlerExpand,
NotStandalone,
ExternalEntityRef,
StartDoctypeDecl,
EndDoctypeDecl,
ExternalParsedEntityDecl,
InternalParsedEntityDecl
};
static PyObject *ErrorObject;
/* ----------------------------------------------------- */
/* Declarations for objects of type xmlparser */
typedef struct {
PyObject_HEAD
XML_Parser itself;
int returns_unicode; /* True if Unicode strings are returned;
if false, UTF-8 strings are returned */
PyObject **handlers;
} xmlparseobject;
staticforward PyTypeObject Xmlparsetype;
typedef void (*xmlhandlersetter)(XML_Parser *self, void *meth);
typedef void* xmlhandler;
struct HandlerInfo {
const char *name;
xmlhandlersetter setter;
xmlhandler handler;
PyCodeObject *tb_code;
};
staticforward struct HandlerInfo handler_info[64];
/* Convert an array of attributes and their values into a Python dict */
static PyObject *
conv_atts_using_string(XML_Char **atts)
{
PyObject *attrs_obj = NULL;
XML_Char **attrs_p, **attrs_k = NULL;
int attrs_len;
PyObject *rv;
if ((attrs_obj = PyDict_New()) == NULL)
goto finally;
for (attrs_len = 0, attrs_p = atts;
*attrs_p;
attrs_p++, attrs_len++) {
if (attrs_len % 2) {
rv = PyString_FromString(*attrs_p);
if (!rv) {
Py_DECREF(attrs_obj);
attrs_obj = NULL;
goto finally;
}
if (PyDict_SetItemString(attrs_obj,
(char*)*attrs_k, rv) < 0) {
Py_DECREF(rv);
Py_DECREF(attrs_obj);
attrs_obj = NULL;
goto finally;
}
Py_DECREF(rv);
}
else
attrs_k = attrs_p;
}
finally:
return attrs_obj;
}
#if !(PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6)
static PyObject *
conv_atts_using_unicode(XML_Char **atts)
{
PyObject *attrs_obj;
XML_Char **attrs_p, **attrs_k = NULL;
int attrs_len;
if ((attrs_obj = PyDict_New()) == NULL)
goto finally;
for (attrs_len = 0, attrs_p = atts;
*attrs_p;
attrs_p++, attrs_len++) {
if (attrs_len % 2) {
PyObject *attr_str, *value_str;
const char *p = (const char *) (*attrs_k);
attr_str = PyUnicode_DecodeUTF8(p, strlen(p), "strict");
if (!attr_str) {
Py_DECREF(attrs_obj);
attrs_obj = NULL;
goto finally;
}
p = (const char *) *attrs_p;
value_str = PyUnicode_DecodeUTF8(p, strlen(p), "strict");
if (!value_str) {
Py_DECREF(attrs_obj);
Py_DECREF(attr_str);
attrs_obj = NULL;
goto finally;
}
if (PyDict_SetItem(attrs_obj, attr_str, value_str) < 0) {
Py_DECREF(attrs_obj);
Py_DECREF(attr_str);
Py_DECREF(value_str);
attrs_obj = NULL;
goto finally;
}
Py_DECREF(attr_str);
Py_DECREF(value_str);
}
else
attrs_k = attrs_p;
}
finally:
return attrs_obj;
}
/* Convert a string of XML_Chars into a Unicode string.
Returns None if str is a null pointer. */
static PyObject *
conv_string_to_unicode(XML_Char *str)
{
/* XXX currently this code assumes that XML_Char is 8-bit,
and hence in UTF-8. */
/* UTF-8 from Expat, Unicode desired */
if (str == NULL) {
Py_INCREF(Py_None);
return Py_None;
}
return PyUnicode_DecodeUTF8((const char *)str,
strlen((const char *)str),
"strict");
}
static PyObject *
conv_string_len_to_unicode(const XML_Char *str, int len)
{
/* XXX currently this code assumes that XML_Char is 8-bit,
and hence in UTF-8. */
/* UTF-8 from Expat, Unicode desired */
if (str == NULL) {
Py_INCREF(Py_None);
return Py_None;
}
return PyUnicode_DecodeUTF8((const char *)str, len, "strict");
}
#endif
/* Convert a string of XML_Chars into an 8-bit Python string.
Returns None if str is a null pointer. */
static PyObject *
conv_string_to_utf8(XML_Char *str)
{
/* XXX currently this code assumes that XML_Char is 8-bit,
and hence in UTF-8. */
/* UTF-8 from Expat, UTF-8 desired */
if (str == NULL) {
Py_INCREF(Py_None);
return Py_None;
}
return PyString_FromString((const char *)str);
}
static PyObject *
conv_string_len_to_utf8(const XML_Char *str, int len)
{
/* XXX currently this code assumes that XML_Char is 8-bit,
and hence in UTF-8. */
/* UTF-8 from Expat, UTF-8 desired */
if (str == NULL) {
Py_INCREF(Py_None);
return Py_None;
}
return PyString_FromStringAndSize((const char *)str, len);
}
/* Callback routines */
static void clear_handlers(xmlparseobject *self, int decref);
static void
flag_error(xmlparseobject *self)
{
clear_handlers(self, 1);
}
static PyCodeObject*
getcode(enum HandlerTypes slot, char* func_name, int lineno)
{
PyObject *code = NULL;
PyObject *name = NULL;
PyObject *nulltuple = NULL;
PyObject *filename = NULL;
if (handler_info[slot].tb_code == NULL) {
code = PyString_FromString("");
if (code == NULL)
goto failed;
name = PyString_FromString(func_name);
if (name == NULL)
goto failed;
nulltuple = PyTuple_New(0);
if (nulltuple == NULL)
goto failed;
filename = PyString_FromString("pyexpat.c");
handler_info[slot].tb_code = PyCode_New(
0, /* argcount */
0, /* nlocals */
0, /* stacksize */
0, /* flags */
code, /* code */
nulltuple, /* consts */
nulltuple, /* names */
nulltuple, /* varnames */
nulltuple, /* freevars */
nulltuple, /* cellvars */
filename, /* filename */
name, /* name */
lineno, /* firstlineno */
code /* lnotab */
);
if (handler_info[slot].tb_code == NULL)
goto failed;
Py_DECREF(code);
Py_DECREF(nulltuple);
Py_DECREF(filename);
Py_DECREF(name);
}
return handler_info[slot].tb_code;
failed:
Py_XDECREF(code);
Py_XDECREF(name);
return NULL;
}
static PyObject*
call_with_frame(PyCodeObject *c, PyObject* func, PyObject* args)
{
PyThreadState *tstate = PyThreadState_GET();
PyFrameObject *f;
PyObject *res;
if (c == NULL)
return NULL;
f = PyFrame_New(
tstate, /*back*/
c, /*code*/
tstate->frame->f_globals, /*globals*/
NULL, /*locals*/
0,
NULL); /* closure */
if (f == NULL)
return NULL;
tstate->frame = f;
res = PyEval_CallObject(func, args);
if (res == NULL && tstate->curexc_traceback == NULL)
PyTraceBack_Here(f);
tstate->frame = f->f_back;
Py_DECREF(f);
return res;
}
#define RC_HANDLER(RC, NAME, PARAMS, INIT, PARAM_FORMAT, CONVERSION, \
RETURN, GETUSERDATA) \
\
static RC my_##NAME##Handler PARAMS {\
xmlparseobject *self = GETUSERDATA ; \
PyObject *args=NULL; \
PyObject *rv=NULL; \
INIT \
\
if (self->handlers[NAME] \
&& self->handlers[NAME] != Py_None) { \
args = Py_BuildValue PARAM_FORMAT ;\
if (!args) return RETURN; \
rv = call_with_frame(getcode(NAME,#NAME,__LINE__),self->handlers[NAME], args); \
Py_DECREF(args); \
if (rv == NULL) { \
flag_error(self); \
return RETURN; \
} \
CONVERSION \
Py_DECREF(rv); \
} \
return RETURN; \
}
#if PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6
#define STRING_CONV_FUNC conv_string_to_utf8
#else
/* Python 1.6 and later versions */
#define STRING_CONV_FUNC (self->returns_unicode \
? conv_string_to_unicode : conv_string_to_utf8)
#endif
#define VOID_HANDLER(NAME, PARAMS, PARAM_FORMAT) \
RC_HANDLER(void, NAME, PARAMS, ;, PARAM_FORMAT, ;, ;,\
(xmlparseobject *)userData)
#define INT_HANDLER(NAME, PARAMS, PARAM_FORMAT)\
RC_HANDLER(int, NAME, PARAMS, int rc=0;, PARAM_FORMAT, \
rc = PyInt_AsLong(rv);, rc, \
(xmlparseobject *)userData)
#if PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6
VOID_HANDLER(StartElement,
(void *userData, const XML_Char *name, const XML_Char **atts),
("(O&O&)", STRING_CONV_FUNC, name,
conv_atts_using_string, atts ) )
#else
/* Python 1.6 and later */
VOID_HANDLER(StartElement,
(void *userData, const XML_Char *name, const XML_Char **atts),
("(O&O&)", STRING_CONV_FUNC, name,
(self->returns_unicode
? conv_atts_using_unicode
: conv_atts_using_string), atts))
#endif
VOID_HANDLER(EndElement,
(void *userData, const XML_Char *name),
("(O&)", STRING_CONV_FUNC, name))
VOID_HANDLER(ProcessingInstruction,
(void *userData,
const XML_Char *target,
const XML_Char *data),
("(O&O&)",STRING_CONV_FUNC,target, STRING_CONV_FUNC,data))
#if PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6
VOID_HANDLER(CharacterData,
(void *userData, const XML_Char *data, int len),
("(N)", conv_string_len_to_utf8(data,len)))
#else
VOID_HANDLER(CharacterData,
(void *userData, const XML_Char *data, int len),
("(N)", (self->returns_unicode
? conv_string_len_to_unicode(data,len)
: conv_string_len_to_utf8(data,len))))
#endif
VOID_HANDLER(UnparsedEntityDecl,
(void *userData,
const XML_Char *entityName,
const XML_Char *base,
const XML_Char *systemId,
const XML_Char *publicId,
const XML_Char *notationName),
("(O&O&O&O&O&)",
STRING_CONV_FUNC,entityName, STRING_CONV_FUNC,base,
STRING_CONV_FUNC,systemId, STRING_CONV_FUNC,publicId,
STRING_CONV_FUNC,notationName))
VOID_HANDLER(NotationDecl,
(void *userData,
const XML_Char *notationName,
const XML_Char *base,
const XML_Char *systemId,
const XML_Char *publicId),
("(O&O&O&O&)",
STRING_CONV_FUNC,notationName, STRING_CONV_FUNC,base,
STRING_CONV_FUNC,systemId, STRING_CONV_FUNC,publicId))
VOID_HANDLER(StartNamespaceDecl,
(void *userData,
const XML_Char *prefix,
const XML_Char *uri),
("(O&O&)", STRING_CONV_FUNC,prefix, STRING_CONV_FUNC,uri))
VOID_HANDLER(EndNamespaceDecl,
(void *userData,
const XML_Char *prefix),
("(O&)", STRING_CONV_FUNC,prefix))
VOID_HANDLER(Comment,
(void *userData, const XML_Char *prefix),
("(O&)", STRING_CONV_FUNC,prefix))
VOID_HANDLER(StartCdataSection,
(void *userData),
("()"))
VOID_HANDLER(EndCdataSection,
(void *userData),
("()"))
#if PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6
VOID_HANDLER(Default,
(void *userData, const XML_Char *s, int len),
("(N)", conv_string_len_to_utf8(s,len)))
VOID_HANDLER(DefaultHandlerExpand,
(void *userData, const XML_Char *s, int len),
("(N)", conv_string_len_to_utf8(s,len)))
#else
VOID_HANDLER(Default,
(void *userData, const XML_Char *s, int len),
("(N)", (self->returns_unicode
? conv_string_len_to_unicode(s,len)
: conv_string_len_to_utf8(s,len))))
VOID_HANDLER(DefaultHandlerExpand,
(void *userData, const XML_Char *s, int len),
("(N)", (self->returns_unicode
? conv_string_len_to_unicode(s,len)
: conv_string_len_to_utf8(s,len))))
#endif
INT_HANDLER(NotStandalone,
(void *userData),
("()"))
RC_HANDLER(int, ExternalEntityRef,
(XML_Parser parser,
const XML_Char *context,
const XML_Char *base,
const XML_Char *systemId,
const XML_Char *publicId),
int rc=0;,
("(O&O&O&O&)",
STRING_CONV_FUNC,context, STRING_CONV_FUNC,base,
STRING_CONV_FUNC,systemId, STRING_CONV_FUNC,publicId),
rc = PyInt_AsLong(rv);, rc,
XML_GetUserData(parser))
/* XXX UnknownEncodingHandler */
#if EXPAT_VERSION >= 0x010200
VOID_HANDLER(StartDoctypeDecl,
(void *userData, const XML_Char *doctypeName),
("(O&)", STRING_CONV_FUNC, doctypeName))
VOID_HANDLER(EndDoctypeDecl, (void *userData), ("()"))
VOID_HANDLER(ExternalParsedEntityDecl,
(void *userData, const XML_Char *entityName,
const XML_Char *base, const XML_Char *systemId,
const XML_Char *publicId),
("(O&O&O&O&)", STRING_CONV_FUNC, entityName,
STRING_CONV_FUNC, base, STRING_CONV_FUNC, systemId,
STRING_CONV_FUNC, publicId))
VOID_HANDLER(InternalParsedEntityDecl,
(void *userData, const XML_Char *entityName,
const XML_Char *replacementText, int replacementTextLength),
("(O&O&i)", STRING_CONV_FUNC, entityName,
STRING_CONV_FUNC, replacementText, replacementTextLength))
#endif /* EXPAT_VERSION >= 0x010200 */
/* ---------------------------------------------------------------- */
static char xmlparse_Parse__doc__[] =
"Parse(data[, isfinal])\n\
Parse XML data. `isfinal' should be true at end of input.";
static PyObject *
xmlparse_Parse(xmlparseobject *self, PyObject *args)
{
char *s;
int slen;
int isFinal = 0;
int rv;
if (!PyArg_ParseTuple(args, "s#|i:Parse", &s, &slen, &isFinal))
return NULL;
rv = XML_Parse(self->itself, s, slen, isFinal);
if (PyErr_Occurred()) {
return NULL;
}
else if (rv == 0) {
PyErr_Format(ErrorObject, "%.200s: line %i, column %i",
XML_ErrorString(XML_GetErrorCode(self->itself)),
XML_GetErrorLineNumber(self->itself),
XML_GetErrorColumnNumber(self->itself));
return NULL;
}
return PyInt_FromLong(rv);
}
/* File reading copied from cPickle */
#define BUF_SIZE 2048
static int
readinst(char *buf, int buf_size, PyObject *meth)
{
PyObject *arg = NULL;
PyObject *bytes = NULL;
PyObject *str = NULL;
int len = -1;
if ((bytes = PyInt_FromLong(buf_size)) == NULL)
goto finally;
if ((arg = PyTuple_New(1)) == NULL)
goto finally;
PyTuple_SET_ITEM(arg, 0, bytes);
if ((str = PyObject_CallObject(meth, arg)) == NULL)
goto finally;
/* XXX what to do if it returns a Unicode string? */
if (!PyString_Check(str)) {
PyErr_Format(PyExc_TypeError,
"read() did not return a string object (type=%.400s)",
str->ob_type->tp_name);
goto finally;
}
len = PyString_GET_SIZE(str);
if (len > buf_size) {
PyErr_Format(PyExc_ValueError,
"read() returned too much data: "
"%i bytes requested, %i returned",
buf_size, len);
Py_DECREF(str);
goto finally;
}
memcpy(buf, PyString_AsString(str), len);
finally:
Py_XDECREF(arg);
Py_XDECREF(str);
return len;
}
static char xmlparse_ParseFile__doc__[] =
"ParseFile(file)\n\
Parse XML data from file-like object.";
static PyObject *
xmlparse_ParseFile(xmlparseobject *self, PyObject *args)
{
int rv = 1;
PyObject *f;
FILE *fp;
PyObject *readmethod = NULL;
if (!PyArg_ParseTuple(args, "O:ParseFile", &f))
return NULL;
if (PyFile_Check(f)) {
fp = PyFile_AsFile(f);
}
else{
fp = NULL;
readmethod = PyObject_GetAttrString(f, "read");
if (readmethod == NULL) {
PyErr_Clear();
PyErr_SetString(PyExc_TypeError,
"argument must have 'read' attribute");
return 0;
}
}
for (;;) {
int bytes_read;
void *buf = XML_GetBuffer(self->itself, BUF_SIZE);
if (buf == NULL)
return PyErr_NoMemory();
if (fp) {
bytes_read = fread(buf, sizeof(char), BUF_SIZE, fp);
if (bytes_read < 0) {
PyErr_SetFromErrno(PyExc_IOError);
return NULL;
}
}
else {
bytes_read = readinst(buf, BUF_SIZE, readmethod);
if (bytes_read < 0)
return NULL;
}
rv = XML_ParseBuffer(self->itself, bytes_read, bytes_read == 0);
if (PyErr_Occurred())
return NULL;
if (!rv || bytes_read == 0)
break;
}
if (rv == 0) {
PyErr_Format(ErrorObject, "%.200s: line %i, column %i",
XML_ErrorString(XML_GetErrorCode(self->itself)),
XML_GetErrorLineNumber(self->itself),
XML_GetErrorColumnNumber(self->itself));
return NULL;
}
return Py_BuildValue("i", rv);
}
static char xmlparse_SetBase__doc__[] =
"SetBase(base_url)\n\
Set the base URL for the parser.";
static PyObject *
xmlparse_SetBase(xmlparseobject *self, PyObject *args)
{
char *base;
if (!PyArg_ParseTuple(args, "s:SetBase", &base))
return NULL;
if (!XML_SetBase(self->itself, base)) {
return PyErr_NoMemory();
}
Py_INCREF(Py_None);
return Py_None;
}
static char xmlparse_GetBase__doc__[] =
"GetBase() -> url\n\
Return base URL string for the parser.";
static PyObject *
xmlparse_GetBase(xmlparseobject *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":GetBase"))
return NULL;
return Py_BuildValue("z", XML_GetBase(self->itself));
}
static char xmlparse_ExternalEntityParserCreate__doc__[] =
"ExternalEntityParserCreate(context[, encoding])\n\
Create a parser for parsing an external entity based on the\n\
information passed to the ExternalEntityRefHandler.";
static PyObject *
xmlparse_ExternalEntityParserCreate(xmlparseobject *self, PyObject *args)
{
char *context;
char *encoding = NULL;
xmlparseobject *new_parser;
int i;
if (!PyArg_ParseTuple(args, "s|s:ExternalEntityParserCreate", &context,
&encoding)) {
return NULL;
}
#if PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6
new_parser = PyObject_NEW(xmlparseobject, &Xmlparsetype);
if (new_parser == NULL)
return NULL;
new_parser->returns_unicode = 0;
#else
/* Code for versions 1.6 and later */
new_parser = PyObject_New(xmlparseobject, &Xmlparsetype);
if (new_parser == NULL)
return NULL;
new_parser->returns_unicode = 1;
#endif
new_parser->itself = XML_ExternalEntityParserCreate(self->itself, context,
encoding);
new_parser->handlers = 0;
PyObject_GC_Init(new_parser);
if (!new_parser->itself) {
Py_DECREF(new_parser);
return PyErr_NoMemory();
}
XML_SetUserData(new_parser->itself, (void *)new_parser);
/* allocate and clear handlers first */
for(i = 0; handler_info[i].name != NULL; i++)
/* do nothing */;
new_parser->handlers = malloc(sizeof(PyObject *)*i);
if (!new_parser->handlers) {
Py_DECREF(new_parser);
return PyErr_NoMemory();
}
clear_handlers(new_parser, 0);
/* then copy handlers from self */
for (i = 0; handler_info[i].name != NULL; i++) {
if (self->handlers[i]) {
Py_INCREF(self->handlers[i]);
new_parser->handlers[i] = self->handlers[i];
handler_info[i].setter(new_parser->itself,
handler_info[i].handler);
}
}
return (PyObject *)new_parser;
}
#if EXPAT_VERSION >= 0x010200
static char xmlparse_SetParamEntityParsing__doc__[] =
"SetParamEntityParsing(flag) -> success\n\
Controls parsing of parameter entities (including the external DTD\n\
subset). Possible flag values are XML_PARAM_ENTITY_PARSING_NEVER,\n\
XML_PARAM_ENTITY_PARSING_UNLESS_STANDALONE and\n\
XML_PARAM_ENTITY_PARSING_ALWAYS. Returns true if setting the flag\n\
was successful.";
static PyObject*
xmlparse_SetParamEntityParsing(PyObject *p, PyObject* args)
{
int flag;
if (!PyArg_ParseTuple(args, "i", &flag))
return NULL;
flag = XML_SetParamEntityParsing(((xmlparseobject*)p)->itself,
flag);
return PyInt_FromLong(flag);
}
#endif /* EXPAT_VERSION >= 0x010200 */
static struct PyMethodDef xmlparse_methods[] = {
{"Parse", (PyCFunction)xmlparse_Parse,
METH_VARARGS, xmlparse_Parse__doc__},
{"ParseFile", (PyCFunction)xmlparse_ParseFile,
METH_VARARGS, xmlparse_ParseFile__doc__},
{"SetBase", (PyCFunction)xmlparse_SetBase,
METH_VARARGS, xmlparse_SetBase__doc__},
{"GetBase", (PyCFunction)xmlparse_GetBase,
METH_VARARGS, xmlparse_GetBase__doc__},
{"ExternalEntityParserCreate", (PyCFunction)xmlparse_ExternalEntityParserCreate,
METH_VARARGS, xmlparse_ExternalEntityParserCreate__doc__},
#if EXPAT_VERSION >= 0x010200
{"SetParamEntityParsing", xmlparse_SetParamEntityParsing,
METH_VARARGS, xmlparse_SetParamEntityParsing__doc__},
#endif
{NULL, NULL} /* sentinel */
};
/* ---------- */
#if !(PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6)
/*
pyexpat international encoding support.
Make it as simple as possible.
*/
static char template_buffer[257];
PyObject * template_string=NULL;
static void
init_template_buffer(void)
{
int i;
for (i=0;i<256;i++) {
template_buffer[i]=i;
};
template_buffer[256]=0;
};
int
PyUnknownEncodingHandler(void *encodingHandlerData,
const XML_Char *name,
XML_Encoding * info)
{
PyUnicodeObject * _u_string=NULL;
int result=0;
int i;
_u_string=(PyUnicodeObject *) PyUnicode_Decode(template_buffer, 256, name, "replace"); // Yes, supports only 8bit encodings
if (_u_string==NULL) {
return result;
};
for (i=0; i<256; i++) {
Py_UNICODE c = _u_string->str[i] ; // Stupid to access directly, but fast
if (c==Py_UNICODE_REPLACEMENT_CHARACTER) {
info->map[i] = -1;
} else {
info->map[i] = c;
};
};
info->data = NULL;
info->convert = NULL;
info->release = NULL;
result=1;
Py_DECREF(_u_string);
return result;
}
#endif
static PyObject *
newxmlparseobject(char *encoding, char *namespace_separator)
{
int i;
xmlparseobject *self;
#if PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6
self = PyObject_NEW(xmlparseobject, &Xmlparsetype);
if (self == NULL)
return NULL;
self->returns_unicode = 0;
#else
/* Code for versions 1.6 and later */
self = PyObject_New(xmlparseobject, &Xmlparsetype);
if (self == NULL)
return NULL;
self->returns_unicode = 1;
#endif
self->handlers = NULL;
if (namespace_separator) {
self->itself = XML_ParserCreateNS(encoding, *namespace_separator);
}
else{
self->itself = XML_ParserCreate(encoding);
}
PyObject_GC_Init(self);
if (self->itself == NULL) {
PyErr_SetString(PyExc_RuntimeError,
"XML_ParserCreate failed");
Py_DECREF(self);
return NULL;
}
XML_SetUserData(self->itself, (void *)self);
#if PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6
#else
XML_SetUnknownEncodingHandler(self->itself, (XML_UnknownEncodingHandler) PyUnknownEncodingHandler, NULL);
#endif
for(i = 0; handler_info[i].name != NULL; i++)
/* do nothing */;
self->handlers = malloc(sizeof(PyObject *)*i);
if (!self->handlers){
Py_DECREF(self);
return PyErr_NoMemory();
}
clear_handlers(self, 0);
return (PyObject*)self;
}
static void
xmlparse_dealloc(xmlparseobject *self)
{
int i;
PyObject_GC_Fini(self);
if (self->itself)
XML_ParserFree(self->itself);
self->itself = NULL;
if(self->handlers){
for (i=0; handler_info[i].name != NULL; i++) {
Py_XDECREF(self->handlers[i]);
}
free (self->handlers);
}
#if PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6
/* Code for versions before 1.6 */
free(self);
#else
/* Code for versions 1.6 and later */
PyObject_Del(self);
#endif
}
static int
handlername2int(const char *name)
{
int i;
for (i=0; handler_info[i].name != NULL; i++) {
if (strcmp(name, handler_info[i].name) == 0) {
return i;
}
}
return -1;
}
static PyObject *
xmlparse_getattr(xmlparseobject *self, char *name)
{
int handlernum;
if (strcmp(name, "ErrorCode") == 0)
return Py_BuildValue("l",
(long)XML_GetErrorCode(self->itself));
if (strcmp(name, "ErrorLineNumber") == 0)
return Py_BuildValue("l",
(long)XML_GetErrorLineNumber(self->itself));
if (strcmp(name, "ErrorColumnNumber") == 0)
return Py_BuildValue("l",
(long)XML_GetErrorColumnNumber(self->itself));
if (strcmp(name, "ErrorByteIndex") == 0)
return Py_BuildValue("l",
XML_GetErrorByteIndex(self->itself));
if (strcmp(name, "returns_unicode") == 0)
return Py_BuildValue("i", self->returns_unicode);
handlernum = handlername2int(name);
if (handlernum != -1 && self->handlers[handlernum] != NULL) {
Py_INCREF(self->handlers[handlernum]);
return self->handlers[handlernum];
}
if (strcmp(name, "__members__") == 0) {
int i;
PyObject *rc = PyList_New(0);
for(i = 0; handler_info[i].name != NULL; i++) {
PyList_Append(rc,
PyString_FromString(handler_info[i].name));
}
PyList_Append(rc, PyString_FromString("ErrorCode"));
PyList_Append(rc, PyString_FromString("ErrorLineNumber"));
PyList_Append(rc, PyString_FromString("ErrorColumnNumber"));
PyList_Append(rc, PyString_FromString("ErrorByteIndex"));
PyList_Append(rc, PyString_FromString("returns_unicode"));
return rc;
}
return Py_FindMethod(xmlparse_methods, (PyObject *)self, name);
}
static int
sethandler(xmlparseobject *self, const char *name, PyObject* v)
{
int handlernum = handlername2int(name);
if (handlernum != -1) {
Py_INCREF(v);
Py_XDECREF(self->handlers[handlernum]);
self->handlers[handlernum] = v;
handler_info[handlernum].setter(self->itself,
handler_info[handlernum].handler);
return 1;
}
return 0;
}
static int
xmlparse_setattr(xmlparseobject *self, char *name, PyObject *v)
{
/* Set attribute 'name' to value 'v'. v==NULL means delete */
if (v==NULL) {
PyErr_SetString(PyExc_RuntimeError, "Cannot delete attribute");
return -1;
}
if (strcmp(name, "returns_unicode") == 0) {
PyObject *intobj = PyNumber_Int(v);
if (intobj == NULL) return -1;
if (PyInt_AsLong(intobj)) {
#if PY_MAJOR_VERSION == 1 && PY_MINOR_VERSION < 6
PyErr_SetString(PyExc_ValueError,
"Cannot return Unicode strings in Python 1.5");
return -1;
#else
self->returns_unicode = 1;
#endif
}
else
self->returns_unicode = 0;
Py_DECREF(intobj);
return 0;
}
if (sethandler(self, name, v)) {
return 0;
}
PyErr_SetString(PyExc_AttributeError, name);
return -1;
}
#ifdef WITH_CYCLE_GC
static int
xmlparse_traverse(xmlparseobject *op, visitproc visit, void *arg)
{
int i, err;
for (i = 0; handler_info[i].name != NULL; i++) {
if (!op->handlers[i])
continue;
err = visit(op->handlers[i], arg);
if (err)
return err;
}
return 0;
}
static int
xmlparse_clear(xmlparseobject *op)
{
clear_handlers(op, 1);
return 0;
}
#endif
static char Xmlparsetype__doc__[] =
"XML parser";
static PyTypeObject Xmlparsetype = {
PyObject_HEAD_INIT(NULL)
0, /*ob_size*/
"xmlparser", /*tp_name*/
sizeof(xmlparseobject) + PyGC_HEAD_SIZE,/*tp_basicsize*/
0, /*tp_itemsize*/
/* methods */
(destructor)xmlparse_dealloc, /*tp_dealloc*/
(printfunc)0, /*tp_print*/
(getattrfunc)xmlparse_getattr, /*tp_getattr*/
(setattrfunc)xmlparse_setattr, /*tp_setattr*/
(cmpfunc)0, /*tp_compare*/
(reprfunc)0, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
(hashfunc)0, /*tp_hash*/
(ternaryfunc)0, /*tp_call*/
(reprfunc)0, /*tp_str*/
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.";
static PyObject *
pyexpat_ParserCreate(PyObject *notused, PyObject *args, PyObject *kw)
{
char *encoding = NULL;
char *namespace_separator = NULL;
static char *kwlist[] = {"encoding", "namespace_separator", NULL};
if (!PyArg_ParseTupleAndKeywords(args, kw, "|zz:ParserCreate", kwlist,
&encoding, &namespace_separator))
return NULL;
if (namespace_separator != NULL
&& strlen(namespace_separator) != 1) {
PyErr_SetString(PyExc_ValueError,
"namespace_separator must be one character,"
" omitted, or None");
return NULL;
}
return newxmlparseobject(encoding, namespace_separator);
}
static char pyexpat_ErrorString__doc__[] =
"ErrorString(errno) -> string\n\
Returns string error for given number.";
static PyObject *
pyexpat_ErrorString(PyObject *self, PyObject *args)
{
long code = 0;
if (!PyArg_ParseTuple(args, "l:ErrorString", &code))
return NULL;
return Py_BuildValue("z", XML_ErrorString((int)code));
}
/* List of methods defined in the module */
static struct PyMethodDef pyexpat_methods[] = {
{"ParserCreate", (PyCFunction)pyexpat_ParserCreate,
METH_VARARGS|METH_KEYWORDS, pyexpat_ParserCreate__doc__},
{"ErrorString", (PyCFunction)pyexpat_ErrorString,
METH_VARARGS, pyexpat_ErrorString__doc__},
{NULL, (PyCFunction)NULL, 0, NULL} /* sentinel */
};
/* Module docstring */
static char pyexpat_module_documentation[] =
"Python wrapper for Expat parser.";
/* Initialization function for the module */
void initpyexpat(void); /* avoid compiler warnings */
#if PY_VERSION_HEX < 0x20000F0
/* 1.5 compatibility: PyModule_AddObject */
static int
PyModule_AddObject(PyObject *m, char *name, PyObject *o)
{
PyObject *dict;
if (!PyModule_Check(m) || o == NULL)
return -1;
dict = PyModule_GetDict(m);
if (dict == NULL)
return -1;
if (PyDict_SetItemString(dict, name, o))
return -1;
Py_DECREF(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)
{
return PyModule_AddObject(m, name, PyString_FromString(value));
}
#endif
DL_EXPORT(void)
initpyexpat(void)
{
PyObject *m, *d;
char *rev = "$Revision$";
PyObject *errmod_name = PyString_FromString("pyexpat.errors");
PyObject *errors_module, *errors_dict;
PyObject *sys_modules;
if (errmod_name == NULL)
return;
Xmlparsetype.ob_type = &PyType_Type;
/* Create the module and add the functions */
m = Py_InitModule4("pyexpat", pyexpat_methods,
pyexpat_module_documentation,
(PyObject*)NULL, PYTHON_API_VERSION);
/* Add some symbolic constants to the module */
if (ErrorObject == NULL)
ErrorObject = PyErr_NewException("xml.parsers.expat.error",
NULL, NULL);
PyModule_AddObject(m, "error", ErrorObject);
Py_INCREF(&Xmlparsetype);
PyModule_AddObject(m, "XMLParserType", (PyObject *) &Xmlparsetype);
PyModule_AddObject(m, "__version__",
PyString_FromStringAndSize(rev+11, strlen(rev+11)-2));
#ifdef XML_MAJOR_VERSION
PyModule_AddStringConstant(m, "EXPAT_VERSION",
(char *) XML_ExpatVersion());
PyModule_AddObject(m, "version_info",
Py_BuildValue("(iii)", XML_MAJOR_VERSION,
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.
*/
PyModule_AddStringConstant(m, "native_encoding", "UTF-8");
d = PyModule_GetDict(m);
errors_module = PyDict_GetItem(d, errmod_name);
if (errors_module == NULL) {
errors_module = PyModule_New("pyexpat.errors");
if (errors_module != NULL) {
sys_modules = PySys_GetObject("modules");
PyDict_SetItem(sys_modules, errmod_name, errors_module);
/* gives away the reference to errors_module */
PyModule_AddObject(m, "errors", errors_module);
}
}
Py_DECREF(errmod_name);
if (errors_module == NULL)
/* Don't code dump later! */
return;
errors_dict = PyModule_GetDict(errors_module);
#define MYCONST(name) \
PyModule_AddStringConstant(errors_module, #name, \
(char*)XML_ErrorString(name))
MYCONST(XML_ERROR_NO_MEMORY);
MYCONST(XML_ERROR_SYNTAX);
MYCONST(XML_ERROR_NO_ELEMENTS);
MYCONST(XML_ERROR_INVALID_TOKEN);
MYCONST(XML_ERROR_UNCLOSED_TOKEN);
MYCONST(XML_ERROR_PARTIAL_CHAR);
MYCONST(XML_ERROR_TAG_MISMATCH);
MYCONST(XML_ERROR_DUPLICATE_ATTRIBUTE);
MYCONST(XML_ERROR_JUNK_AFTER_DOC_ELEMENT);
MYCONST(XML_ERROR_PARAM_ENTITY_REF);
MYCONST(XML_ERROR_UNDEFINED_ENTITY);
MYCONST(XML_ERROR_RECURSIVE_ENTITY_REF);
MYCONST(XML_ERROR_ASYNC_ENTITY);
MYCONST(XML_ERROR_BAD_CHAR_REF);
MYCONST(XML_ERROR_BINARY_ENTITY_REF);
MYCONST(XML_ERROR_ATTRIBUTE_EXTERNAL_ENTITY_REF);
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, 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);
}
}
typedef void (*pairsetter)(XML_Parser, void *handler1, void *handler2);
static void
pyxml_UpdatePairedHandlers(xmlparseobject *self,
int startHandler,
int endHandler,
pairsetter setter)
{
void *start_handler=NULL;
void *end_handler=NULL;
if (self->handlers[startHandler]
&& self->handlers[endHandler]!=Py_None) {
start_handler=handler_info[startHandler].handler;
}
if (self->handlers[EndElement]
&& self->handlers[EndElement] !=Py_None) {
end_handler=handler_info[endHandler].handler;
}
setter(self->itself, start_handler, end_handler);
}
static void
pyxml_SetStartElementHandler(XML_Parser *parser, void *junk)
{
pyxml_UpdatePairedHandlers((xmlparseobject *)XML_GetUserData(parser),
StartElement, EndElement,
(pairsetter)XML_SetElementHandler);
}
static void
pyxml_SetEndElementHandler(XML_Parser *parser, void *junk)
{
pyxml_UpdatePairedHandlers((xmlparseobject *)XML_GetUserData(parser),
StartElement, EndElement,
(pairsetter)XML_SetElementHandler);
}
static void
pyxml_SetStartNamespaceDeclHandler(XML_Parser *parser, void *junk)
{
pyxml_UpdatePairedHandlers((xmlparseobject *)XML_GetUserData(parser),
StartNamespaceDecl, EndNamespaceDecl,
(pairsetter)XML_SetNamespaceDeclHandler);
}
static void
pyxml_SetEndNamespaceDeclHandler(XML_Parser *parser, void *junk)
{
pyxml_UpdatePairedHandlers((xmlparseobject *)XML_GetUserData(parser),
StartNamespaceDecl, EndNamespaceDecl,
(pairsetter)XML_SetNamespaceDeclHandler);
}
static void
pyxml_SetStartCdataSection(XML_Parser *parser, void *junk)
{
pyxml_UpdatePairedHandlers((xmlparseobject *)XML_GetUserData(parser),
StartCdataSection, EndCdataSection,
(pairsetter)XML_SetCdataSectionHandler);
}
static void
pyxml_SetEndCdataSection(XML_Parser *parser, void *junk)
{
pyxml_UpdatePairedHandlers((xmlparseobject *)XML_GetUserData(parser),
StartCdataSection, EndCdataSection,
(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,
(xmlhandler)my_StartElementHandler},
{"EndElementHandler",
pyxml_SetEndElementHandler,
(xmlhandler)my_EndElementHandler},
{"ProcessingInstructionHandler",
(xmlhandlersetter)XML_SetProcessingInstructionHandler,
(xmlhandler)my_ProcessingInstructionHandler},
{"CharacterDataHandler",
(xmlhandlersetter)XML_SetCharacterDataHandler,
(xmlhandler)my_CharacterDataHandler},
{"UnparsedEntityDeclHandler",
(xmlhandlersetter)XML_SetUnparsedEntityDeclHandler,
(xmlhandler)my_UnparsedEntityDeclHandler },
{"NotationDeclHandler",
(xmlhandlersetter)XML_SetNotationDeclHandler,
(xmlhandler)my_NotationDeclHandler },
{"StartNamespaceDeclHandler",
pyxml_SetStartNamespaceDeclHandler,
(xmlhandler)my_StartNamespaceDeclHandler },
{"EndNamespaceDeclHandler",
pyxml_SetEndNamespaceDeclHandler,
(xmlhandler)my_EndNamespaceDeclHandler },
{"CommentHandler",
(xmlhandlersetter)XML_SetCommentHandler,
(xmlhandler)my_CommentHandler},
{"StartCdataSectionHandler",
pyxml_SetStartCdataSection,
(xmlhandler)my_StartCdataSectionHandler},
{"EndCdataSectionHandler",
pyxml_SetEndCdataSection,
(xmlhandler)my_EndCdataSectionHandler},
{"DefaultHandler",
(xmlhandlersetter)XML_SetDefaultHandler,
(xmlhandler)my_DefaultHandler},
{"DefaultHandlerExpand",
(xmlhandlersetter)XML_SetDefaultHandlerExpand,
(xmlhandler)my_DefaultHandlerExpandHandler},
{"NotStandaloneHandler",
(xmlhandlersetter)XML_SetNotStandaloneHandler,
(xmlhandler)my_NotStandaloneHandler},
{"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 */
};
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