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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
#include "cmXMLParser.h"
#include <cmsys/FStream.hxx>
#include <cm_expat.h>
#include <ctype.h>
cmXMLParser::cmXMLParser()
{
this->Parser = 0;
this->ParseError = 0;
this->ReportCallback = 0;
this->ReportCallbackData = 0;
}
cmXMLParser::~cmXMLParser()
{
if ( this->Parser )
{
this->CleanupParser();
}
}
int cmXMLParser::Parse(const char* string)
{
return (int)this->InitializeParser() &&
this->ParseChunk(string, strlen(string)) &&
this->CleanupParser();
}
int cmXMLParser::ParseFile(const char* file)
{
if ( !file )
{
return 0;
}
cmsys::ifstream ifs(file);
if ( !ifs )
{
return 0;
}
std::ostringstream str;
str << ifs.rdbuf();
return this->Parse(str.str().c_str());
}
int cmXMLParser::InitializeParser()
{
if ( this->Parser )
{
std::cerr << "Parser already initialized" << std::endl;
this->ParseError = 1;
return 0;
}
// Create the expat XML parser.
this->Parser = XML_ParserCreate(0);
XML_SetElementHandler(static_cast<XML_Parser>(this->Parser),
&cmXMLParserStartElement,
&cmXMLParserEndElement);
XML_SetCharacterDataHandler(static_cast<XML_Parser>(this->Parser),
&cmXMLParserCharacterDataHandler);
XML_SetUserData(static_cast<XML_Parser>(this->Parser), this);
this->ParseError = 0;
return 1;
}
int cmXMLParser::ParseChunk(const char* inputString,
std::string::size_type length)
{
if ( !this->Parser )
{
std::cerr << "Parser not initialized" << std::endl;
this->ParseError = 1;
return 0;
}
int res;
res = this->ParseBuffer(inputString, length);
if ( res == 0 )
{
this->ParseError = 1;
}
return res;
}
int cmXMLParser::CleanupParser()
{
if ( !this->Parser )
{
std::cerr << "Parser not initialized" << std::endl;
this->ParseError = 1;
return 0;
}
int result = !this->ParseError;
if(result)
{
// Tell the expat XML parser about the end-of-input.
if(!XML_Parse(static_cast<XML_Parser>(this->Parser), "", 0, 1))
{
this->ReportXmlParseError();
result = 0;
}
}
// Clean up the parser.
XML_ParserFree(static_cast<XML_Parser>(this->Parser));
this->Parser = 0;
return result;
}
int cmXMLParser::ParseBuffer(const char* buffer, std::string::size_type count)
{
// Pass the buffer to the expat XML parser.
if(!XML_Parse(static_cast<XML_Parser>(this->Parser), buffer,
static_cast<int>(count), 0))
{
this->ReportXmlParseError();
return 0;
}
return 1;
}
int cmXMLParser::ParseBuffer(const char* buffer)
{
return this->ParseBuffer(buffer, static_cast<int>(strlen(buffer)));
}
int cmXMLParser::ParsingComplete()
{
// Default behavior is to parse to end of stream.
return 0;
}
void cmXMLParser::StartElement(const std::string& name,
const char ** /*atts*/)
{
std::cout << "Start element: " << name << std::endl;
}
void cmXMLParser::EndElement(const std::string& name)
{
std::cout << "End element: " << name << std::endl;
}
void cmXMLParser::CharacterDataHandler(const char* /*inData*/,
int /*inLength*/)
{
}
int cmXMLParser::IsSpace(char c)
{
return isspace(c);
}
const char* cmXMLParser::FindAttribute(const char** atts,
const char* attribute)
{
if(atts && attribute)
{
for(const char** a = atts; *a && *(a+1); a += 2)
{
if(strcmp(*a, attribute) == 0)
{
return *(a+1);
}
}
}
return 0;
}
void cmXMLParserStartElement(void* parser, const char *name,
const char **atts)
{
// Begin element handler that is registered with the XML_Parser.
// This just casts the user data to a cmXMLParser and calls
// StartElement.
static_cast<cmXMLParser*>(parser)->StartElement(name, atts);
}
void cmXMLParserEndElement(void* parser, const char *name)
{
// End element handler that is registered with the XML_Parser. This
// just casts the user data to a cmXMLParser and calls EndElement.
static_cast<cmXMLParser*>(parser)->EndElement(name);
}
void cmXMLParserCharacterDataHandler(void* parser, const char* data,
int length)
{
// Character data handler that is registered with the XML_Parser.
// This just casts the user data to a cmXMLParser and calls
// CharacterDataHandler.
static_cast<cmXMLParser*>(parser)->CharacterDataHandler(data, length);
}
void cmXMLParser::ReportXmlParseError()
{
XML_Parser parser = static_cast<XML_Parser>(this->Parser);
this->ReportError(XML_GetCurrentLineNumber(parser),
XML_GetCurrentColumnNumber(parser),
XML_ErrorString(XML_GetErrorCode(parser)));
}
void cmXMLParser::ReportError(int line, int, const char* msg)
{
if(this->ReportCallback)
{
this->ReportCallback(line, msg, this->ReportCallbackData);
}
else
{
std::cerr << "Error parsing XML in stream at line "
<< line << ": " << msg << std::endl;
}
}
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