/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /*************************************************************************** * saxparser.cc * * Mon Mar 24 14:40:15 CET 2008 * Copyright 2008 Bent Bisballe Nyeng * deva@aasimon.org ****************************************************************************/ /* * This file is part of Pracro. * * Pracro is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * Pracro is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Pracro; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include "saxparser.h" #include "debug.h" #include static void character_hndl(void *p, const XML_Char *s, int len) { SAXParser *parser = (SAXParser*)XML_GetUserData(p); std::string chars; chars.append(s, len); parser->characterData(chars); } static void start_hndl(void *p, const char *el, const char **attr) { SAXParser *parser = (SAXParser*)XML_GetUserData(p); // Convert to comfy C++ values... std::string name = el; std::map< std::string, std::string > attributes; while(*attr) { std::string at_name = *attr; attr++; std::string at_value = *attr; attr++; attributes.insert(make_pair(at_name, at_value)); } if(parser->outertag == "") parser->outertag = name; parser->startTag(name, attributes); } static void end_hndl(void *p, const char *el) { SAXParser *parser = (SAXParser*)XML_GetUserData(p); std::string name = el; if(name == parser->outertag) parser->done = true; parser->endTag(name); } SAXParser::SAXParser() { p = XML_ParserCreate(NULL); if(!p) { PRACRO_ERR_LOG(sax, "Couldn't allocate memory for parser\n"); // throw Exception(...); return; } XML_SetUserData(p, this); XML_UseParserAsHandlerArg(p); XML_SetElementHandler(p, start_hndl, end_hndl); XML_SetCharacterDataHandler(p, character_hndl); bufferbytes = 0; totalbytes = 0; done = false; } SAXParser::~SAXParser() { XML_ParserFree(p); } int SAXParser::parse() { char buf[32]; int len; do { len = readData(buf, sizeof(buf) - 1); if (! XML_Parse(p, buf, len, len == 0)) { parseError(buf, len, XML_ErrorString(XML_GetErrorCode(p)), (int)XML_GetCurrentLineNumber(p)); return 1; } memset(buf, 0, sizeof(buf)); } while(len); return 0; } bool SAXParser::parse(char *data, size_t size) { PRACRO_DEBUG(sax, "parse %d bytes\n", size); bufferbytes = size; totalbytes += bufferbytes; if(! XML_Parse(p, data, size, false) ) { if(XML_GetErrorCode(p) == XML_ERROR_JUNK_AFTER_DOC_ELEMENT) return true; parseError(data, size, XML_ErrorString(XML_GetErrorCode(p)), (int)XML_GetCurrentLineNumber(p)); return false; } if(done) { if(! XML_Parse(p, data, 0, true) ) { if(XML_GetErrorCode(p) == XML_ERROR_JUNK_AFTER_DOC_ELEMENT) return true; parseError(data, 0, XML_ErrorString(XML_GetErrorCode(p)), (int)XML_GetCurrentLineNumber(p)); return false; } } if(done) PRACRO_DEBUG(sax, "Got END_OF_DOCUMENT [%s] at %ld\n", outertag.c_str(), XML_GetCurrentByteIndex(p)); return done; } void SAXParser::parseError(char *buf, size_t len, std::string error, int lineno) { fprintf(stderr, "SAXParser error at line %d: %s\n", lineno, error.c_str()); fprintf(stderr, "\tBuffer %u bytes: [", len); if(fwrite(buf, len, 1, stderr) != len) {} fprintf(stderr, "]\n"); fflush(stderr); } unsigned int SAXParser::usedBytes() { return bufferbytes + (XML_GetCurrentByteIndex(p) - totalbytes); } #ifdef TEST_SAXPARSER /** * Compile with: g++ -DTEST_SAXPARSER sax_parser.cc -lexpat -otext_saxparser * Run with: ./test_saxparser [xmlfile] */ #include #include #include class MyParser :public SAXParser { public: MyParser(char *file) { fd = open(file, O_RDONLY); } int readData(char *data, size_t size) { return read(fd, data, size); } void startTag(std::string name, std::map< std::string, std::string> attributes) { printf("<%s>\n", name.c_str()); } private: int fd; }; int main(int argc, char *argv[]) { if(argc < 2) return 1; MyParser parser(argv[1]); parser.parse(); } #endif/*TEST_SAXPARSER*/