#include <assert.h>

#include <string.h>

#include "cllazyfile/p21HeaderSectionReader.h"

#include "cllazyfile/headerSectionReader.h"

#include "cllazyfile/sectionReader.h"

#include "cllazyfile/lazyInstMgr.h"

#include "cllazyfile/judyL2Array.h"

void p21HeaderSectionReader::findSectionStart() {

_sectionStart = findNormalString( "HEADER", true );

assert( _file.is_open() && _file.good() );

}

p21HeaderSectionReader::p21HeaderSectionReader( lazyFileReader * parent, std::ifstream & file,

std::streampos start, sectionID sid ):

headerSectionReader( parent, file, start, sid ) {

findSectionStart();

findSectionEnd();

_file.seekg( _sectionStart );

namedLazyInstance nl;

while( nl = nextInstance(), ( nl.loc.begin > 0 ) ) {

std::streampos pos = _file.tellg();

_headerInstances->insert( nl.loc.instance, getRealInstance( _lazyFile->getInstMgr()->getHeaderRegistry(), nl.loc.begin, nl.loc.instance, nl.name, "", true ) );

_file.seekg( pos ); //reset stream position for next call to nextInstance()

}

_file.seekg( _sectionEnd );

}

// part of readdata1

const namedLazyInstance p21HeaderSectionReader::nextInstance() {

namedLazyInstance i;

static instanceID nextFreeInstance = 4; // 1-3 are reserved per 10303-21

i.refs = 0;

i.loc.begin = _file.tellg();

i.loc.section = _sectionID;

skipWS();

if( i.loc.begin <= 0 ) {

i.name = 0;

} else {

i.name = getDelimitedKeyword( ";( /\\" );

if( 0 == strcmp( "FILE_DESCRIPTION", i.name ) ) {

i.loc.instance = 1;

} else if( 0 == strcmp( "FILE_NAME", i.name ) ) {

i.loc.instance = 2;

} else if( 0 == strcmp( "FILE_SCHEMA", i.name ) ) {

i.loc.instance = 3;

} else {

i.loc.instance = nextFreeInstance++;

}

assert( strlen( i.name ) > 0 );

std::streampos end = seekInstanceEnd( 0 ); //no references in file header

if( ( (signed long int)end == -1 ) || ( end >= _sectionEnd ) ) {

//invalid instance, so clear everything

i.loc.begin = -1;

i.name = 0;

}

}

return i;

}