#include <string>
#include <vector>
#include <stdexcept>
#include <expat.h>
#include "xmlutf8reader.h"

XmlUtf8Reader::XmlUtf8Reader (
    bool parseDeclaration,
    bool expandInternalEntities,
    size_t size ) :
        d ( new UtfData() )
{
    d->buffer.reserve ( size );
    XML_SetUserData ( p, d.get() );

    // parse declaration?
    if ( parseDeclaration )
        XML_SetXmlDeclHandler ( p, xmldeclhandler );

    // internal entities
    if ( expandInternalEntities )
        XML_SetDefaultHandlerExpand ( p, defaulthandler );
    else
        XML_SetDefaultHandler ( p, defaulthandler );
}

XmlUtf8Reader::~XmlUtf8Reader()
{}

void XMLCALL XmlUtf8Reader::xmldeclhandler (
    void *data,
    const XML_Char *version,
    const XML_Char *encoding,
    int standalone )
{
    UtfData *d;
    d = ( UtfData * ) data;

    d->encoding = ( encoding ) ? encoding : "UTF-8";

    d->buffer.append ( "<?xml version=\"" );
    d->buffer.append ( version );
    d->buffer.append ( "\" encoding=\"" );
    d->buffer.append ( d->encoding );
    d->buffer.append ( "\"" );

    if ( standalone != -1 )
    {
        d->buffer.append ( " standalone=\"" );
        d->buffer.append ( ( standalone == 1 ) ? "yes" : "no" );
        d->buffer.append ( "\"" );
    }
    d->buffer.append ( "?>" );
}

void XMLCALL XmlUtf8Reader::defaulthandler (
    void *data,
    const XML_Char *s,
    int len )
{
    UtfData *d;
    d = ( UtfData * ) data;
    d->buffer.append ( s, len );
}