(* zlibpas -- Pascal interface to the zlib data compression library * * Copyright (C) 2003 Cosmin Truta. * Derived from original sources by Bob Dellaca. * For conditions of distribution and use, see copyright notice in readme.txt *) unit zlibpas; interface const ZLIB_VERSION = '1.3.0.1'; ZLIB_VERNUM = $12a0; type alloc_func = function(opaque: Pointer; items, size: Integer): Pointer; cdecl; free_func = procedure(opaque, address: Pointer); cdecl; in_func = function(opaque: Pointer; var buf: PByte): Integer; cdecl; out_func = function(opaque: Pointer; buf: PByte; size: Integer): Integer; cdecl; z_streamp = ^z_stream; z_stream = packed record next_in: PChar; (* next input byte *) avail_in: Integer; (* number of bytes available at next_in *) total_in: LongInt; (* total nb of input bytes read so far *) next_out: PChar; (* next output byte should be put there *) avail_out: Integer; (* remaining free space at next_out *) total_out: LongInt; (* total nb of bytes output so far *) msg: PChar; (* last error message, NULL if no error *) state: Pointer; (* not visible by applications *) zalloc: alloc_func; (* used to allocate the internal state *) zfree: free_func; (* used to free the internal state *) opaque: Pointer; (* private data object passed to zalloc and zfree *) data_type: Integer; (* best guess about the data type: ascii or binary *) adler: LongInt; (* adler32 value of the uncompressed data *) reserved: LongInt; (* reserved for future use *) end; gz_headerp = ^gz_header; gz_header = packed record text: Integer; (* true if compressed data believed to be text *) time: LongInt; (* modification time *) xflags: Integer; (* extra flags (not used when writing a gzip file) *) os: Integer; (* operating system *) extra: PChar; (* pointer to extra field or Z_NULL if none *) extra_len: Integer; (* extra field length (valid if extra != Z_NULL) *) extra_max: Integer; (* space at extra (only when reading header) *) name: PChar; (* pointer to zero-terminated file name or Z_NULL *) name_max: Integer; (* space at name (only when reading header) *) comment: PChar; (* pointer to zero-terminated comment or Z_NULL *) comm_max: Integer; (* space at comment (only when reading header) *) hcrc: Integer; (* true if there was or will be a header crc *) done: Integer; (* true when done reading gzip header *) end; (* constants *) const Z_NO_FLUSH = 0; Z_PARTIAL_FLUSH = 1; Z_SYNC_FLUSH = 2; Z_FULL_FLUSH = 3; Z_FINISH = 4; Z_BLOCK = 5; Z_TREES = 6; Z_OK = 0; Z_STREAM_END = 1; Z_NEED_DICT = 2; Z_ERRNO = -1; Z_STREAM_ERROR = -2; Z_DATA_ERROR = -3; Z_MEM_ERROR = -4; Z_BUF_ERROR = -5; Z_VERSION_ERROR = -6; Z_NO_COMPRESSION = 0; Z_BEST_SPEED = 1; Z_BEST_COMPRESSION = 9; Z_DEFAULT_COMPRESSION = -1; Z_FILTERED = 1; Z_HUFFMAN_ONLY = 2; Z_RLE = 3; Z_FIXED = 4; Z_DEFAULT_STRATEGY = 0; Z_BINARY = 0; Z_TEXT = 1; Z_ASCII = 1; Z_UNKNOWN = 2; Z_DEFLATED = 8; (* basic functions *) function zlibVersion: PChar; function deflateInit(var strm: z_stream; level: Integer): Integer; function deflate(var strm: z_stream; flush: Integer): Integer; function deflateEnd(var strm: z_stream): Integer; function inflateInit(var strm: z_stream): Integer; function inflate(var strm: z_stream; flush: Integer): Integer; function inflateEnd(var strm: z_stream): Integer; (* advanced functions *) function deflateInit2(var strm: z_stream; level, method, windowBits, memLevel, strategy: Integer): Integer; function deflateSetDictionary(var strm: z_stream; const dictionary: PChar; dictLength: Integer): Integer; function deflateCopy(var dest, source: z_stream): Integer; function deflateReset(var strm: z_stream): Integer; function deflateParams(var strm: z_stream; level, strategy: Integer): Integer; function deflateTune(var strm: z_stream; good_length, max_lazy, nice_length, max_chain: Integer): Integer; function deflateBound(var strm: z_stream; sourceLen: LongInt): LongInt; function deflatePending(var strm: z_stream; var pending: Integer; var bits: Integer): Integer; function deflatePrime(var strm: z_stream; bits, value: Integer): Integer; function deflateSetHeader(var strm: z_stream; head: gz_header): Integer; function inflateInit2(var strm: z_stream; windowBits: Integer): Integer; function inflateSetDictionary(var strm: z_stream; const dictionary: PChar; dictLength: Integer): Integer; function inflateSync(var strm: z_stream): Integer; function inflateCopy(var dest, source: z_stream): Integer; function inflateReset(var strm: z_stream): Integer; function inflateReset2(var strm: z_stream; windowBits: Integer): Integer; function inflatePrime(var strm: z_stream; bits, value: Integer): Integer; function inflateMark(var strm: z_stream): LongInt; function inflateGetHeader(var strm: z_stream; var head: gz_header): Integer; function inflateBackInit(var strm: z_stream; windowBits: Integer; window: PChar): Integer; function inflateBack(var strm: z_stream; in_fn: in_func; in_desc: Pointer; out_fn: out_func; out_desc: Pointer): Integer; function inflateBackEnd(var strm: z_stream): Integer; function zlibCompileFlags: LongInt; (* utility functions *) function compress(dest: PChar; var destLen: LongInt; const source: PChar; sourceLen: LongInt): Integer; function compress2(dest: PChar; var destLen: LongInt; const source: PChar; sourceLen: LongInt; level: Integer): Integer; function compressBound(sourceLen: LongInt): LongInt; function uncompress(dest: PChar; var destLen: LongInt; const source: PChar; sourceLen: LongInt): Integer; (* checksum functions *) function adler32(adler: LongInt; const buf: PChar; len: Integer): LongInt; function adler32_combine(adler1, adler2, len2: LongInt): LongInt; function crc32(crc: LongInt; const buf: PChar; len: Integer): LongInt; function crc32_combine(crc1, crc2, len2: LongInt): LongInt; (* various hacks, don't look :) *) function deflateInit_(var strm: z_stream; level: Integer; const version: PChar; stream_size: Integer): Integer; function inflateInit_(var strm: z_stream; const version: PChar; stream_size: Integer): Integer; function deflateInit2_(var strm: z_stream; level, method, windowBits, memLevel, strategy: Integer; const version: PChar; stream_size: Integer): Integer; function inflateInit2_(var strm: z_stream; windowBits: Integer; const version: PChar; stream_size: Integer): Integer; function inflateBackInit_(var strm: z_stream; windowBits: Integer; window: PChar; const version: PChar; stream_size: Integer): Integer; implementation {$L adler32.obj} {$L compress.obj} {$L crc32.obj} {$L deflate.obj} {$L infback.obj} {$L inffast.obj} {$L inflate.obj} {$L inftrees.obj} {$L trees.obj} {$L uncompr.obj} {$L zutil.obj} function adler32; external; function adler32_combine; external; function compress; external; function compress2; external; function compressBound; external; function crc32; external; function crc32_combine; external; function deflate; external; function deflateBound; external; function deflateCopy; external; function deflateEnd; external; function deflateInit_; external; function deflateInit2_; external; function deflateParams; external; function deflatePending; external; function deflatePrime; external; function deflateReset; external; function deflateSetDictionary; external; function deflateSetHeader; external; function deflateTune; external; function inflate; external; function inflateBack; external; function inflateBackEnd; external; function inflateBackInit_; external; function inflateCopy; external; function inflateEnd; external; function inflateGetHeader; external; function inflateInit_; external; function inflateInit2_; external; function inflateMark; external; function inflatePrime; external; function inflateReset; external; function inflateReset2; external; function inflateSetDictionary; external; function inflateSync; external; function uncompress; external; function zlibCompileFlags; external; function zlibVersion; external; function deflateInit(var strm: z_stream; level: Integer): Integer; begin Result := deflateInit_(strm, level, ZLIB_VERSION, sizeof(z_stream)); end; function deflateInit2(var strm: z_stream; level, method, windowBits, memLevel, strategy: Integer): Integer; begin Result := deflateInit2_(strm, level, method, windowBits, memLevel, strategy, ZLIB_VERSION, sizeof(z_stream)); end; function inflateInit(var strm: z_stream): Integer; begin Result := inflateInit_(strm, ZLIB_VERSION, sizeof(z_stream)); end; function inflateInit2(var strm: z_stream; windowBits: Integer): Integer; begin Result := inflateInit2_(strm, windowBits, ZLIB_VERSION, sizeof(z_stream)); end; function inflateBackInit(var strm: z_stream; windowBits: Integer; window: PChar): Integer; begin Result := inflateBackInit_(strm, windowBits, window, ZLIB_VERSION, sizeof(z_stream)); end; function _malloc(Size: Integer): Pointer; cdecl; begin GetMem(Result, Size); end; procedure _free(Block: Pointer); cdecl; begin FreeMem(Block); end; procedure _memset(P: Pointer; B: Byte; count: Integer); cdecl; begin FillChar(P^, count, B); end; procedure _memcpy(dest, source: Pointer; count: Integer); cdecl; begin Move(source^, dest^, count); end; end.