llxmlparser.cpp
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- /**
- * @file llxmlparser.cpp
- * @brief LLXmlParser implementation
- *
- * $LicenseInfo:firstyear=2002&license=viewergpl$
- *
- * Copyright (c) 2002-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- // llxmlparser.cpp
- //
- // copyright 2002, linden research inc
- #include "linden_common.h"
- #include "llxmlparser.h"
- #include "llerror.h"
- LLXmlParser::LLXmlParser()
- :
- mParser( NULL ),
- mDepth( 0 )
- {
- mAuxErrorString = "no error";
- // Override the document's declared encoding.
- mParser = XML_ParserCreate(NULL);
- XML_SetUserData(mParser, this);
- XML_SetElementHandler( mParser, startElementHandler, endElementHandler);
- XML_SetCharacterDataHandler( mParser, characterDataHandler);
- XML_SetProcessingInstructionHandler( mParser, processingInstructionHandler);
- XML_SetCommentHandler( mParser, commentHandler);
- XML_SetCdataSectionHandler( mParser, startCdataSectionHandler, endCdataSectionHandler);
- // This sets the default handler but does not inhibit expansion of internal entities.
- // The entity reference will not be passed to the default handler.
- XML_SetDefaultHandlerExpand( mParser, defaultDataHandler);
-
- XML_SetUnparsedEntityDeclHandler( mParser, unparsedEntityDeclHandler);
- }
- LLXmlParser::~LLXmlParser()
- {
- XML_ParserFree( mParser );
- }
- BOOL LLXmlParser::parseFile(const std::string &path)
- {
- llassert( !mDepth );
-
- BOOL success = TRUE;
- LLFILE* file = LLFile::fopen(path, "rb"); /* Flawfinder: ignore */
- if( !file )
- {
- mAuxErrorString = llformat( "Couldn't open file %s", path.c_str());
- success = FALSE;
- }
- else
- {
- S32 bytes_read = 0;
-
- fseek(file, 0L, SEEK_END);
- S32 buffer_size = ftell(file);
- fseek(file, 0L, SEEK_SET);
- void* buffer = XML_GetBuffer(mParser, buffer_size);
- if( !buffer )
- {
- mAuxErrorString = llformat( "Unable to allocate XML buffer while reading file %s", path.c_str() );
- success = FALSE;
- goto exit_label;
- }
-
- bytes_read = (S32)fread(buffer, 1, buffer_size, file);
- if( bytes_read <= 0 )
- {
- mAuxErrorString = llformat( "Error while reading file %s", path.c_str() );
- success = FALSE;
- goto exit_label;
- }
-
- if( !XML_ParseBuffer(mParser, bytes_read, TRUE ) )
- {
- mAuxErrorString = llformat( "Error while parsing file %s", path.c_str() );
- success = FALSE;
- }
- exit_label:
- fclose( file );
- }
- if( success )
- {
- llassert( !mDepth );
- }
- mDepth = 0;
- if( !success )
- {
- llwarns << mAuxErrorString << llendl;
- }
- return success;
- }
- // Parses some input. Returns 0 if a fatal error is detected.
- // The last call must have isFinal true;
- // len may be zero for this call (or any other).
- S32 LLXmlParser::parse( const char* buf, int len, int isFinal )
- {
- return XML_Parse(mParser, buf, len, isFinal);
- }
- const char* LLXmlParser::getErrorString()
- {
- const char* error_string = XML_ErrorString(XML_GetErrorCode( mParser ));
- if( !error_string )
- {
- error_string = mAuxErrorString.c_str();
- }
- return error_string;
- }
- S32 LLXmlParser::getCurrentLineNumber()
- {
- return XML_GetCurrentLineNumber( mParser );
- }
- S32 LLXmlParser::getCurrentColumnNumber()
- {
- return XML_GetCurrentColumnNumber(mParser);
- }
- ///////////////////////////////////////////////////////////////////////////////
- // Pseudo-private methods. These are only used by internal callbacks.
- // static
- void LLXmlParser::startElementHandler(
- void *userData,
- const XML_Char *name,
- const XML_Char **atts)
- {
- LLXmlParser* self = (LLXmlParser*) userData;
- self->startElement( name, atts );
- self->mDepth++;
- }
- // static
- void LLXmlParser::endElementHandler(
- void *userData,
- const XML_Char *name)
- {
- LLXmlParser* self = (LLXmlParser*) userData;
- self->mDepth--;
- self->endElement( name );
- }
- // s is not 0 terminated.
- // static
- void LLXmlParser::characterDataHandler(
- void *userData,
- const XML_Char *s,
- int len)
- {
- LLXmlParser* self = (LLXmlParser*) userData;
- self->characterData( s, len );
- }
- // target and data are 0 terminated
- // static
- void LLXmlParser::processingInstructionHandler(
- void *userData,
- const XML_Char *target,
- const XML_Char *data)
- {
- LLXmlParser* self = (LLXmlParser*) userData;
- self->processingInstruction( target, data );
- }
- // data is 0 terminated
- // static
- void LLXmlParser::commentHandler(void *userData, const XML_Char *data)
- {
- LLXmlParser* self = (LLXmlParser*) userData;
- self->comment( data );
- }
- // static
- void LLXmlParser::startCdataSectionHandler(void *userData)
- {
- LLXmlParser* self = (LLXmlParser*) userData;
- self->mDepth++;
- self->startCdataSection();
- }
- // static
- void LLXmlParser::endCdataSectionHandler(void *userData)
- {
- LLXmlParser* self = (LLXmlParser*) userData;
- self->endCdataSection();
- self->mDepth++;
- }
- // This is called for any characters in the XML document for
- // which there is no applicable handler. This includes both
- // characters that are part of markup which is of a kind that is
- // not reported (comments, markup declarations), or characters
- // that are part of a construct which could be reported but
- // for which no handler has been supplied. The characters are passed
- // exactly as they were in the XML document except that
- // they will be encoded in UTF-8. Line boundaries are not normalized.
- // Note that a byte order mark character is not passed to the default handler.
- // There are no guarantees about how characters are divided between calls
- // to the default handler: for example, a comment might be split between
- // multiple calls.
- // static
- void LLXmlParser::defaultDataHandler(
- void *userData,
- const XML_Char *s,
- int len)
- {
- LLXmlParser* self = (LLXmlParser*) userData;
- self->defaultData( s, len );
- }
- // This is called for a declaration of an unparsed (NDATA)
- // entity. The base argument is whatever was set by XML_SetBase.
- // The entityName, systemId and notationName arguments will never be null.
- // The other arguments may be.
- // static
- void LLXmlParser::unparsedEntityDeclHandler(
- void *userData,
- const XML_Char *entityName,
- const XML_Char *base,
- const XML_Char *systemId,
- const XML_Char *publicId,
- const XML_Char *notationName)
- {
- LLXmlParser* self = (LLXmlParser*) userData;
- self->unparsedEntityDecl( entityName, base, systemId, publicId, notationName );
- }
- ////////////////////////////////////////////////////////////////////
- // Test code.
- /*
- class LLXmlDOMParser : public LLXmlParser
- {
- public:
- LLXmlDOMParser() {}
- virtual ~LLXmlDOMParser() {}
- void tabs()
- {
- for ( int i = 0; i < getDepth(); i++)
- {
- putchar(' ');
- }
- }
- virtual void startElement(const char *name, const char **atts)
- {
- tabs();
- printf("startElement %sn", name);
-
- S32 i = 0;
- while( atts[i] && atts[i+1] )
- {
- tabs();
- printf( "t%s=%sn", atts[i], atts[i+1] );
- i += 2;
- }
- if( atts[i] )
- {
- tabs();
- printf( "ttrailing attribute: %sn", atts[i] );
- }
- }
- virtual void endElement(const char *name)
- {
- tabs();
- printf("endElement %sn", name);
- }
- virtual void characterData(const char *s, int len)
- {
- tabs();
- char* str = new char[len+1];
- strncpy( str, s, len );
- str[len] = ' ';
- printf("CharacterData %sn", str);
- delete str;
- }
- virtual void processingInstruction(const char *target, const char *data)
- {
- tabs();
- printf("processingInstruction %sn", data);
- }
- virtual void comment(const char *data)
- {
- tabs();
- printf("comment %sn", data);
- }
- virtual void startCdataSection()
- {
- tabs();
- printf("startCdataSectionn");
- }
- virtual void endCdataSection()
- {
- tabs();
- printf("endCdataSectionn");
- }
- virtual void defaultData(const char *s, int len)
- {
- tabs();
- char* str = new char[len+1];
- strncpy( str, s, len );
- str[len] = ' ';
- printf("defaultData %sn", str);
- delete str;
- }
- virtual void unparsedEntityDecl(
- const char *entityName,
- const char *base,
- const char *systemId,
- const char *publicId,
- const char *notationName)
- {
- tabs();
- printf(
- "unparsed entity:n"
- "tentityName %sn"
- "tbase %sn"
- "tsystemId %sn"
- "tpublicId %sn"
- "tnotationName %sn",
- entityName,
- base,
- systemId,
- publicId,
- notationName );
- }
- };
- int main()
- {
- char buf[1024];
- LLFILE* file = LLFile::fopen("test.xml", "rb");
- if( !file )
- {
- return 1;
- }
- LLXmlDOMParser parser;
- int done;
- do {
- size_t len = fread(buf, 1, sizeof(buf), file);
- done = len < sizeof(buf);
- if( 0 == parser.parse( buf, len, done) )
- {
- fprintf(stderr,
- "%s at line %dn",
- parser.getErrorString(),
- parser.getCurrentLineNumber() );
- return 1;
- }
- } while (!done);
- fclose( file );
- return 0;
- }
- */