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- /*
- * Copyright 2004 The WebRTC Project Authors. All rights reserved.
- *
- * Use of this source code is governed by a BSD-style license
- * that can be found in the LICENSE file in the root of the source
- * tree. An additional intellectual property rights grant can be found
- * in the file PATENTS. All contributing project authors may
- * be found in the AUTHORS file in the root of the source tree.
- */
- #include "third_party/libjingle_xmpp/xmllite/xmlparser.h"
- #include <string>
- #include <vector>
- #include "third_party/libjingle_xmpp/xmllite/xmlconstants.h"
- #include "third_party/libjingle_xmpp/xmllite/xmlelement.h"
- #include "third_party/libjingle_xmpp/xmllite/xmlnsstack.h"
- #include "third_party/libjingle_xmpp/xmllite/xmlnsstack.h"
- namespace jingle_xmpp {
- static void
- StartElementCallback(void * userData, const char *name, const char **atts) {
- (static_cast<XmlParser *>(userData))->ExpatStartElement(name, atts);
- }
- static void
- EndElementCallback(void * userData, const char *name) {
- (static_cast<XmlParser *>(userData))->ExpatEndElement(name);
- }
- static void
- CharacterDataCallback(void * userData, const char *text, int len) {
- (static_cast<XmlParser *>(userData))->ExpatCharacterData(text, len);
- }
- static void
- XmlDeclCallback(void * userData, const char * ver, const char * enc, int st) {
- (static_cast<XmlParser *>(userData))->ExpatXmlDecl(ver, enc, st);
- }
- XmlParser::XmlParser(XmlParseHandler *pxph) :
- pxph_(pxph), sentError_(false) {
- expat_ = XML_ParserCreate(NULL);
- XML_SetUserData(expat_, this);
- XML_SetElementHandler(expat_, StartElementCallback, EndElementCallback);
- XML_SetCharacterDataHandler(expat_, CharacterDataCallback);
- XML_SetXmlDeclHandler(expat_, XmlDeclCallback);
- }
- void
- XmlParser::Reset() {
- if (!XML_ParserReset(expat_, NULL)) {
- XML_ParserFree(expat_);
- expat_ = XML_ParserCreate(NULL);
- }
- XML_SetUserData(expat_, this);
- XML_SetElementHandler(expat_, StartElementCallback, EndElementCallback);
- XML_SetCharacterDataHandler(expat_, CharacterDataCallback);
- XML_SetXmlDeclHandler(expat_, XmlDeclCallback);
- context_.Reset();
- sentError_ = false;
- }
- static bool
- XmlParser_StartsWithXmlns(const char *name) {
- return name[0] == 'x' &&
- name[1] == 'm' &&
- name[2] == 'l' &&
- name[3] == 'n' &&
- name[4] == 's';
- }
- void
- XmlParser::ExpatStartElement(const char *name, const char **atts) {
- if (context_.RaisedError() != XML_ERROR_NONE)
- return;
- const char **att;
- context_.StartElement();
- for (att = atts; *att; att += 2) {
- if (XmlParser_StartsWithXmlns(*att)) {
- if ((*att)[5] == '\0') {
- context_.StartNamespace("", *(att + 1));
- }
- else if ((*att)[5] == ':') {
- if (**(att + 1) == '\0') {
- // In XML 1.0 empty namespace illegal with prefix (not in 1.1)
- context_.RaiseError(XML_ERROR_SYNTAX);
- return;
- }
- context_.StartNamespace((*att) + 6, *(att + 1));
- }
- }
- }
- context_.SetPosition(XML_GetCurrentLineNumber(expat_),
- XML_GetCurrentColumnNumber(expat_),
- XML_GetCurrentByteIndex(expat_));
- pxph_->StartElement(&context_, name, atts);
- }
- void
- XmlParser::ExpatEndElement(const char *name) {
- if (context_.RaisedError() != XML_ERROR_NONE)
- return;
- context_.EndElement();
- context_.SetPosition(XML_GetCurrentLineNumber(expat_),
- XML_GetCurrentColumnNumber(expat_),
- XML_GetCurrentByteIndex(expat_));
- pxph_->EndElement(&context_, name);
- }
- void
- XmlParser::ExpatCharacterData(const char *text, int len) {
- if (context_.RaisedError() != XML_ERROR_NONE)
- return;
- context_.SetPosition(XML_GetCurrentLineNumber(expat_),
- XML_GetCurrentColumnNumber(expat_),
- XML_GetCurrentByteIndex(expat_));
- pxph_->CharacterData(&context_, text, len);
- }
- void
- XmlParser::ExpatXmlDecl(const char * ver, const char * enc, int standalone) {
- if (context_.RaisedError() != XML_ERROR_NONE)
- return;
- if (ver && std::string("1.0") != ver) {
- context_.RaiseError(XML_ERROR_SYNTAX);
- return;
- }
- if (standalone == 0) {
- context_.RaiseError(XML_ERROR_SYNTAX);
- return;
- }
- if (enc && !((enc[0] == 'U' || enc[0] == 'u') &&
- (enc[1] == 'T' || enc[1] == 't') &&
- (enc[2] == 'F' || enc[2] == 'f') &&
- enc[3] == '-' && enc[4] =='8')) {
- context_.RaiseError(XML_ERROR_INCORRECT_ENCODING);
- return;
- }
- }
- bool
- XmlParser::Parse(const char *data, size_t len, bool isFinal) {
- if (sentError_)
- return false;
- if (XML_Parse(expat_, data, static_cast<int>(len), isFinal) !=
- XML_STATUS_OK) {
- context_.SetPosition(XML_GetCurrentLineNumber(expat_),
- XML_GetCurrentColumnNumber(expat_),
- XML_GetCurrentByteIndex(expat_));
- context_.RaiseError(XML_GetErrorCode(expat_));
- }
- if (context_.RaisedError() != XML_ERROR_NONE) {
- sentError_ = true;
- pxph_->Error(&context_, context_.RaisedError());
- return false;
- }
- return true;
- }
- XmlParser::~XmlParser() {
- XML_ParserFree(expat_);
- }
- void
- XmlParser::ParseXml(XmlParseHandler *pxph, std::string text) {
- XmlParser parser(pxph);
- parser.Parse(text.c_str(), text.length(), true);
- }
- XmlParser::ParseContext::ParseContext() :
- xmlnsstack_(),
- raised_(XML_ERROR_NONE),
- line_number_(0),
- column_number_(0),
- byte_index_(0) {
- }
- void
- XmlParser::ParseContext::StartNamespace(const char *prefix, const char *ns) {
- xmlnsstack_.AddXmlns(*prefix ? prefix : STR_EMPTY, ns);
- }
- void
- XmlParser::ParseContext::StartElement() {
- xmlnsstack_.PushFrame();
- }
- void
- XmlParser::ParseContext::EndElement() {
- xmlnsstack_.PopFrame();
- }
- QName
- XmlParser::ParseContext::ResolveQName(const char* qname, bool isAttr) {
- const char *c;
- for (c = qname; *c; ++c) {
- if (*c == ':') {
- const std::pair<std::string, bool> result =
- xmlnsstack_.NsForPrefix(std::string(qname, c - qname));
- if (!result.second)
- return QName();
- return QName(result.first, c + 1);
- }
- }
- if (isAttr)
- return QName(STR_EMPTY, qname);
- std::pair<std::string, bool> result = xmlnsstack_.NsForPrefix(STR_EMPTY);
- if (!result.second)
- return QName();
- return QName(result.first, qname);
- }
- void
- XmlParser::ParseContext::Reset() {
- xmlnsstack_.Reset();
- raised_ = XML_ERROR_NONE;
- }
- void
- XmlParser::ParseContext::SetPosition(int line, int column,
- long byte_index) {
- line_number_ = line;
- column_number_ = column;
- byte_index_ = byte_index;
- }
- void
- XmlParser::ParseContext::GetPosition(unsigned long * line,
- unsigned long * column,
- unsigned long * byte_index) {
- if (line != NULL) {
- *line = static_cast<unsigned long>(line_number_);
- }
- if (column != NULL) {
- *column = static_cast<unsigned long>(column_number_);
- }
- if (byte_index != NULL) {
- *byte_index = static_cast<unsigned long>(byte_index_);
- }
- }
- XmlParser::ParseContext::~ParseContext() {
- }
- } // namespace jingle_xmpp
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