#include <assert.h>

#include "cllazyfile/lazyFileReader.h"

#include "cllazyfile/lazyDataSectionReader.h"

#include "cllazyfile/headerSectionReader.h"

#include "cllazyfile/lazyInstMgr.h"

void lazyFileReader::initP21() {

_header = new p21HeaderSectionReader( this, _file, 0, -1 );

for( ;; ) {

lazyDataSectionReader * r;

r = new lazyP21DataSectionReader( this, _file, _file.tellg(), _parent->countDataSections() );

if( !r->success() ) {

delete r; //last read attempt failed

std::cerr << "Corrupted data section" << std::endl;

break;

}

_parent->registerDataSection( r );

//check for new data section (DATA) or end of file (END-ISO-10303-21;)

while( isspace( _file.peek() ) && _file.good() ) {

_file.ignore( 1 );

}

if( needKW( "END-ISO-10303-21;" ) ) {

break;

} else if( !needKW( "DATA" ) ) {

std::cerr << "Corrupted file - did not find new data section (\"DATA\") or end of file (\"END-ISO-10303-21;\") at offset " << _file.tellg() << std::endl;

break;

}

}

}

bool lazyFileReader::needKW( const char * kw ) {

const char * c = kw;

bool found = true;

while( *c ) {

if( *c != _file.get() ) {

found = false;

break;

}

c++;

}

return found;

}

instancesLoaded_t * lazyFileReader::getHeaderInstances() {

return _header->getInstances();

}

lazyFileReader::lazyFileReader( std::string fname, lazyInstMgr * i, fileID fid ): _fileName( fname ), _parent( i ), _fileID( fid ) {

_file.open( _fileName.c_str(), std::ios::binary );

_file.imbue( std::locale::classic() );

_file.unsetf( std::ios_base::skipws );

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

detectType();

switch( _fileType ) {

case Part21:

initP21();

break;

case Part28:

//initP28();

//break;

default:

std::cerr << "Reached default case, " << __FILE__ << ":" << __LINE__ << std::endl;

abort();

}

}

lazyFileReader::~lazyFileReader() {

delete _header;

}