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filesystem: zip: remove 'big' block

pull/2/head
Mr0maks 5 years ago
parent
b42f020ad5
commit
01a33dcf7e
1 changed files with 77 additions and 78 deletions
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  1. 155
      engine/common/filesystem.c

155
engine/common/filesystem.c
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@ -830,119 +830,118 @@ static byte *Zip_LoadFile( const char *path, fs_offset_t *sizeptr, qboolean game
search = FS_FindFile( path, &index, gamedironly ); search = FS_FindFile( path, &index, gamedironly );
if( search && search->zip ) if( !search || !search->zip )
{ return NULL;
file = &search->zip->files[index]; file = &search->zip->files[index];
FS_Seek( search->zip->handle, file->offset, SEEK_SET ); FS_Seek( search->zip->handle, file->offset, SEEK_SET );
FS_Read( search->zip->handle, (void*)&header, sizeof( header ) ); FS_Read( search->zip->handle, (void*)&header, sizeof( header ) );
if( header.signature != ZIP_HEADER_LF ) if( header.signature != ZIP_HEADER_LF )
{ {
Con_Reportf( S_ERROR "Zip_LoadFile: %s signature error\n", file->name ); Con_Reportf( S_ERROR "Zip_LoadFile: %s signature error\n", file->name );
return NULL; return NULL;
} }
if( header.compression_flags == ZIP_COMPRESSION_NO_COMPRESSION ) if( header.compression_flags == ZIP_COMPRESSION_NO_COMPRESSION )
{ {
if( header.filename_len ) if( header.filename_len )
FS_Seek( search->zip->handle, header.filename_len, SEEK_CUR ); FS_Seek( search->zip->handle, header.filename_len, SEEK_CUR );
if( header.extrafield_len ) if( header.extrafield_len )
FS_Seek( search->zip->handle, header.extrafield_len, SEEK_CUR ); FS_Seek( search->zip->handle, header.extrafield_len, SEEK_CUR );
decompressed_buffer = Mem_Malloc( search->zip->mempool, file->size + 1 ); decompressed_buffer = Mem_Malloc( search->zip->mempool, file->size + 1 );
decompressed_buffer[file->size] = '\0'; decompressed_buffer[file->size] = '\0';
FS_Read( search->zip->handle, decompressed_buffer, file->size ); FS_Read( search->zip->handle, decompressed_buffer, file->size );
CRC32_Init( &test_crc ); CRC32_Init( &test_crc );
CRC32_ProcessBuffer( &test_crc, decompressed_buffer, file->size ); CRC32_ProcessBuffer( &test_crc, decompressed_buffer, file->size );
final_crc = CRC32_Final( test_crc ); final_crc = CRC32_Final( test_crc );
if( final_crc != header.crc32 ) if( final_crc != header.crc32 )
{
Con_Reportf( S_ERROR "Zip_LoadFile: %s file crc32 mismatch\n", file->name );
Mem_Free( decompressed_buffer );
return NULL;
}
if( sizeptr ) *sizeptr = file->size;
return decompressed_buffer;
}
else if( header.compression_flags == ZIP_COMPRESSION_DEFLATED )
{ {
if( header.filename_len ) Con_Reportf( S_ERROR "Zip_LoadFile: %s file crc32 mismatch\n", file->name );
FS_Seek( search->zip->handle, header.filename_len, SEEK_CUR ); Mem_Free( decompressed_buffer );
return NULL;
}
if( header.extrafield_len ) if( sizeptr ) *sizeptr = file->size;
FS_Seek( search->zip->handle, header.extrafield_len, SEEK_CUR );
compressed_buffer = Mem_Malloc( search->zip->mempool, file->compressed_size + 1 ); return decompressed_buffer;
decompressed_buffer = Mem_Malloc( search->zip->mempool, file->size + 1 ); }
decompressed_buffer[file->size] = '\0'; else if( header.compression_flags == ZIP_COMPRESSION_DEFLATED )
{
if( header.filename_len )
FS_Seek( search->zip->handle, header.filename_len, SEEK_CUR );
FS_Read( search->zip->handle, compressed_buffer, file->compressed_size ); if( header.extrafield_len )
FS_Seek( search->zip->handle, header.extrafield_len, SEEK_CUR );
memset( &decompress_stream, 0, sizeof( decompress_stream ) ); compressed_buffer = Mem_Malloc( search->zip->mempool, file->compressed_size + 1 );
decompressed_buffer = Mem_Malloc( search->zip->mempool, file->size + 1 );
decompressed_buffer[file->size] = '\0';
decompress_stream.total_in = decompress_stream.avail_in = file->compressed_size; FS_Read( search->zip->handle, compressed_buffer, file->compressed_size );
decompress_stream.next_in = (Bytef *)compressed_buffer;
decompress_stream.total_out = decompress_stream.avail_out = file->size;
decompress_stream.next_out = (Bytef *)decompressed_buffer;
decompress_stream.zalloc = Z_NULL; memset( &decompress_stream, 0, sizeof( decompress_stream ) );
decompress_stream.zfree = Z_NULL;
decompress_stream.opaque = Z_NULL;
if( inflateInit2( &decompress_stream, -MAX_WBITS ) != Z_OK ) decompress_stream.total_in = decompress_stream.avail_in = file->compressed_size;
{ decompress_stream.next_in = (Bytef *)compressed_buffer;
Con_Printf( S_ERROR "Zip_LoadFile: inflateInit2 failed\n" ); decompress_stream.total_out = decompress_stream.avail_out = file->size;
Mem_Free( compressed_buffer ); decompress_stream.next_out = (Bytef *)decompressed_buffer;
Mem_Free( decompressed_buffer );
return NULL;
}
zlib_result = inflate( &decompress_stream, Z_NO_FLUSH ); decompress_stream.zalloc = Z_NULL;
inflateEnd( &decompress_stream ); decompress_stream.zfree = Z_NULL;
decompress_stream.opaque = Z_NULL;
if( zlib_result == Z_OK || zlib_result == Z_STREAM_END ) if( inflateInit2( &decompress_stream, -MAX_WBITS ) != Z_OK )
{ {
Mem_Free( compressed_buffer ); // finaly free compressed buffer Con_Printf( S_ERROR "Zip_LoadFile: inflateInit2 failed\n" );
Mem_Free( compressed_buffer );
Mem_Free( decompressed_buffer );
return NULL;
}
CRC32_Init( &test_crc ); zlib_result = inflate( &decompress_stream, Z_NO_FLUSH );
CRC32_ProcessBuffer( &test_crc, decompressed_buffer, file->size ); inflateEnd( &decompress_stream );
final_crc = CRC32_Final( test_crc ); if( zlib_result == Z_OK || zlib_result == Z_STREAM_END )
{
Mem_Free( compressed_buffer ); // finaly free compressed buffer
if( final_crc != header.crc32 ) CRC32_Init( &test_crc );
{ CRC32_ProcessBuffer( &test_crc, decompressed_buffer, file->size );
Con_Reportf( S_ERROR "Zip_LoadFile: %s file crc32 mismatch\n", file->name );
Mem_Free( decompressed_buffer );
return NULL;
}
if( sizeptr ) *sizeptr = file->size; final_crc = CRC32_Final( test_crc );
return decompressed_buffer; if( final_crc != header.crc32 )
}
else
{ {
Con_Reportf( S_ERROR "Zip_LoadFile: %s : error while file decompressing. Zlib return code %d.\n", file->name, zlib_result ); Con_Reportf( S_ERROR "Zip_LoadFile: %s file crc32 mismatch\n", file->name );
Mem_Free( compressed_buffer );
Mem_Free( decompressed_buffer ); Mem_Free( decompressed_buffer );
return NULL; return NULL;
} }
if( sizeptr ) *sizeptr = file->size;
return decompressed_buffer;
} }
else else
{ {
Con_Reportf( S_ERROR "Zip_LoadFile: %s : file compressed with unknown algorithm.\n", file->name ); Con_Reportf( S_ERROR "Zip_LoadFile: %s : error while file decompressing. Zlib return code %d.\n", file->name, zlib_result );
Mem_Free( compressed_buffer );
Mem_Free( decompressed_buffer );
return NULL; return NULL;
} }
}
else
{
Con_Reportf( S_ERROR "Zip_LoadFile: %s : file compressed with unknown algorithm.\n", file->name );
return NULL;
} }
return NULL; return NULL;

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