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Diffstat (limited to 'zlib/contrib/pascal/zlibpas.pas')
| -rw-r--r-- | zlib/contrib/pascal/zlibpas.pas | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/zlib/contrib/pascal/zlibpas.pas b/zlib/contrib/pascal/zlibpas.pas new file mode 100644 index 000000000..836848c2b --- /dev/null +++ b/zlib/contrib/pascal/zlibpas.pas @@ -0,0 +1,236 @@ +(* 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 = '1.2.3'; + +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; + +(* constants *) +const + Z_NO_FLUSH = 0; + Z_PARTIAL_FLUSH = 1; + Z_SYNC_FLUSH = 2; + Z_FULL_FLUSH = 3; + Z_FINISH = 4; + + 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_DEFAULT_STRATEGY = 0; + + Z_BINARY = 0; + 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 deflateBound(var strm: z_stream; sourceLen: LongInt): LongInt; +function deflatePrime(var strm: z_stream; bits, value: Integer): 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 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 crc32(crc: LongInt; const buf: PChar; len: Integer): 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 compress; external; +function compress2; external; +function compressBound; external; +function crc32; external; +function deflate; external; +function deflateBound; external; +function deflateCopy; external; +function deflateEnd; external; +function deflateInit_; external; +function deflateInit2_; external; +function deflateParams; external; +function deflatePrime; external; +function deflateReset; external; +function deflateSetDictionary; external; +function inflate; external; +function inflateBack; external; +function inflateBackEnd; external; +function inflateBackInit_; external; +function inflateCopy; external; +function inflateEnd; external; +function inflateInit_; external; +function inflateInit2_; external; +function inflateReset; 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. |