/*
================
idDemoFile::OpenForWriting
================
*/
bool idDemoFile::OpenForWriting( const char *fileName )
{
Close();
f = fileSystem->OpenFileWrite( fileName );
if( f == NULL )
{
return false;
}
if( com_logDemos.GetBool() )
{
fLog = fileSystem->OpenFileWrite( "demowrite.log" );
}
writing = true;
f->Write( DEMO_MAGIC, sizeof( DEMO_MAGIC ) );
f->WriteInt( com_compressDemos.GetInteger() );
f->Flush();
compressor = AllocCompressor( com_compressDemos.GetInteger() );
compressor->Init( f, true, 8 );
return true;
}
/*
================
idDemoFile::OpenForReading
================
*/
bool idDemoFile::OpenForReading( const char *fileName ) {
static const int magicLen = sizeof( DEMO_MAGIC ) / sizeof( DEMO_MAGIC[0] );
char magicBuffer[magicLen];
int compression;
int fileLength;
Close();
f = fileSystem->OpenFileRead( fileName );
if( !f ) {
return false;
}
fileLength = f->Length();
if( com_preloadDemos.GetBool() ) {
fileImage = ( byte * )Mem_Alloc( fileLength );
f->Read( fileImage, fileLength );
fileSystem->CloseFile( f );
f = new idFile_Memory( va( "preloaded(%s)", fileName ), ( const char * )fileImage, fileLength );
}
if( com_logDemos.GetBool() ) {
fLog = fileSystem->OpenFileWrite( "demoread.log" );
}
writing = false;
f->Read( magicBuffer, magicLen );
if( memcmp( magicBuffer, DEMO_MAGIC, magicLen ) == 0 ) {
f->ReadInt( compression );
} else {
// Ideally we would error out if the magic string isn't there,
// but for backwards compatibility we are going to assume it's just an uncompressed demo file
compression = 0;
f->Rewind();
}
compressor = AllocCompressor( compression );
compressor->Init( f, false, 8 );
return true;
}