void OGRDXFWriterDS::ScanForEntities( const char *pszFilename,
const char *pszTarget )
{
OGRDXFReader oReader;
VSILFILE *fp;
/* -------------------------------------------------------------------- */
/* Open the file and setup a reader. */
/* -------------------------------------------------------------------- */
fp = VSIFOpenL( pszFilename, "r" );
if( fp == NULL )
return;
oReader.Initialize( fp );
/* -------------------------------------------------------------------- */
/* Add every code "5" line to our entities list. */
/* -------------------------------------------------------------------- */
char szLineBuf[257];
int nCode;
const char *pszPortion = "HEADER";
while( (nCode = oReader.ReadValue( szLineBuf, sizeof(szLineBuf) )) != -1 )
{
if( (nCode == 5 || nCode == 105) && EQUAL(pszTarget,pszPortion) )
{
CPLString osEntity( szLineBuf );
if( CheckEntityID( osEntity ) )
CPLDebug( "DXF", "Encounted entity '%s' multiple times.",
osEntity.c_str() );
else
aosUsedEntities.insert( osEntity );
}
if( nCode == 0 && EQUAL(szLineBuf,"SECTION") )
{
nCode = oReader.ReadValue( szLineBuf, sizeof(szLineBuf) );
if( nCode == 2 && EQUAL(szLineBuf,"ENTITIES") )
pszPortion = "BODY";
if( nCode == 2 && EQUAL(szLineBuf,"OBJECTS") )
pszPortion = "TRAILER";
}
}
VSIFCloseL( fp );
}
bool OGRDXFWriterDS::TransferUpdateTrailer( VSILFILE *fpOut )
{
/* -------------------------------------------------------------------- */
/* Open the file and setup a reader. */
/* -------------------------------------------------------------------- */
VSILFILE *l_fp = VSIFOpenL( osTrailerFile, "r" );
if( l_fp == NULL )
return false;
OGRDXFReader oReader;
oReader.Initialize( l_fp );
/* -------------------------------------------------------------------- */
/* Scan ahead to find the OBJECTS section. */
/* -------------------------------------------------------------------- */
char szLineBuf[257];
int nCode = 0;
while( (nCode = oReader.ReadValue( szLineBuf, sizeof(szLineBuf) )) != -1 )
{
if( nCode == 0 && EQUAL(szLineBuf,"SECTION") )
{
nCode = oReader.ReadValue( szLineBuf, sizeof(szLineBuf) );
if( nCode == 2 && EQUAL(szLineBuf,"OBJECTS") )
break;
}
}
if( nCode == -1 )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Failed to find OBJECTS section in trailer file '%s'.",
osTrailerFile.c_str() );
return false;
}
/* -------------------------------------------------------------------- */
/* Insert the "end of section" for ENTITIES, and the start of */
/* the OBJECTS section. */
/* -------------------------------------------------------------------- */
WriteValue( fpOut, 0, "ENDSEC" );
WriteValue( fpOut, 0, "SECTION" );
WriteValue( fpOut, 2, "OBJECTS" );
/* -------------------------------------------------------------------- */
/* Copy the remainder of the file. */
/* -------------------------------------------------------------------- */
while( (nCode = oReader.ReadValue( szLineBuf, sizeof(szLineBuf) )) != -1 )
{
if( !WriteValue( fpOut, nCode, szLineBuf ) )
{
VSIFCloseL( fp );
return false;
}
}
VSIFCloseL( l_fp );
return true;
}