llxmlparser.h

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#ifndef LL_LLXMLPARSER_H
#define LL_LLXMLPARSER_H

#define XML_STATIC
#ifdef LL_STANDALONE
#include <expat.h>
#else
#include "expat/expat.h"
#endif

class LLXmlParser
{
public:
        LLXmlParser();
        virtual ~LLXmlParser();

        // Parses entire file
        BOOL parseFile(const std::string &path);

        //      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 parse( const char* buf, int len, int isFinal );

        const char* getErrorString();
        
        S32 getCurrentLineNumber();

        S32 getCurrentColumnNumber();

        S32 getDepth() { return mDepth; }

protected:
        // atts is array of name/value pairs, terminated by 0;
        // names and values are 0 terminated.
        virtual void startElement(const char *name, const char **atts) {}

        virtual void endElement(const char *name) {}

        // s is not 0 terminated.
        virtual void characterData(const char *s, int len) {}
        
        // target and data are 0 terminated
        virtual void processingInstruction(const char *target, const char *data) {}

        // data is 0 terminated 
        virtual void comment(const char *data) {}

        virtual void startCdataSection() {}

        virtual void endCdataSection() {}

        //      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.
        virtual void defaultData(const char *s, int 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.
        virtual void unparsedEntityDecl(
                const char *entityName,
                const char *base,
                const char *systemId,
                const char *publicId,
                const char *notationName) {}

public:
        // Pseudo-private methods.  These are only used by internal callbacks.
        
        static void startElementHandler(void *userData, const XML_Char *name, const XML_Char **atts);
        static void endElementHandler(void *userData, const XML_Char *name);
        static void characterDataHandler(void *userData, const XML_Char *s, int len);
        static void processingInstructionHandler(void *userData, const XML_Char *target, const XML_Char *data);
        static void commentHandler(void *userData, const XML_Char *data);
        static void startCdataSectionHandler(void *userData);
        static void endCdataSectionHandler(void *userData);
        static void defaultDataHandler( void *userData, const XML_Char *s, int len);
        static void unparsedEntityDeclHandler(
                void *userData,
                const XML_Char *entityName,
                const XML_Char *base,
                const XML_Char *systemId,
                const XML_Char *publicId,
                const XML_Char *notationName);


protected:
        XML_Parser              mParser;
        int                             mDepth;
        char                    mAuxErrorString[1024];          /*Flawfinder: ignore*/
};

#endif  // LL_LLXMLPARSER_H

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