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(*
* zlib pascal headers
* This file is part of Free Pascal, released under the LGPL.
*)
{$ifdef FPC}
{$ifndef NO_SMART_LINK}
{$smartlink on}
{$endif}
{$endif}
unit zlib;
interface
{$ifdef FPC}
{$mode objfpc} // Needed for array of const
{$H+} // use long strings
{$PACKRECORDS C}
{$endif}
uses
ctypes;
const
ZLIB_VERSION = '1.2.3';
{$ifdef MSWINDOWS}
libz = 'zlib1';
{$else}
libz = 'z';
{$IFDEF DARWIN}
{$linklib libz}
{$ENDIF}
{$endif}
type
{ Compatible with paszlib }
uInt = cuint;
uLong = culong;
uLongf = uLong; {FAR}
PuLongf = ^uLongf;
z_off_t = clong;
pbyte = ^byte;
bytef = byte; {FAR}
pbytef = ^byte;
voidpf = pointer;
TAllocfunc = function (opaque: voidpf; items: uInt; size: uInt): voidpf; cdecl;
TFreeFunc = procedure (opaque: voidpf; address: voidpf); cdecl;
TInternalState = record
end;
PInternalState = ^TInternalstate;
TZStream = record
next_in: pbytef;
avail_in: uInt;
total_in: uLong;
next_out: pbytef;
avail_out: uInt;
total_out: uLong;
msg: pchar;
state: PInternalState;
zalloc: TAllocFunc;
zfree: TFreeFunc;
opaque: voidpf;
data_type: cint;
adler: uLong;
reserved: uLong;
end;
TZStreamRec = TZStream;
PZstream = ^TZStream;
gzFile = pointer;
const
Z_NO_FLUSH = 0;
Z_PARTIAL_FLUSH = 1;
Z_SYNC_FLUSH = 2;
Z_FULL_FLUSH = 3;
Z_FINISH = 4;
Z_BLOCK = 5;
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 = Z_TEXT;
Z_UNKNOWN = 2;
Z_DEFLATED = 8;
Z_NULL = 0;
function zlibVersionpchar(): pchar; cdecl; external libz name 'zlibVersion';
function zlibVersion(): string;
function deflate(var strm: TZStream; flush: integer): integer; cdecl; external libz name 'deflate';
function deflateEnd(var strm: TZStream): integer; cdecl; external libz name 'deflateEnd';
function inflate(var strm: TZStream; flush: integer): integer; cdecl; external libz name 'inflate';
function inflateEnd(var strm: TZStream): integer; cdecl; external libz name 'inflateEnd';
function deflateSetDictionary(var strm: TZStream; dictionary: pbytef; dictLength: uInt): integer; cdecl; external libz name 'deflateSetDictionary';
function deflateCopy(var dest, source: TZstream): integer; cdecl; external libz name 'deflateCopy';
function deflateReset(var strm: TZStream): integer; cdecl; external libz name 'deflateReset';
function deflateParams(var strm: TZStream; level: integer; strategy: integer): integer; cdecl; external libz name 'deflateParams';
//...
function inflateSetDictionary(var strm: TZStream; dictionary: pbytef; dictLength: uInt): integer; cdecl; external libz name 'inflateSetDictionary';
function inflateSync(var strm: TZStream): integer; cdecl; external libz name 'inflateSync';
//...
function inflateReset(var strm: TZStream): integer; cdecl; external libz name 'inflateReset';
function compress(dest: pbytef; destLen: puLongf; source : pbytef; sourceLen: uLong): integer; cdecl; external libz name 'compress';
function compress2(dest: pbytef; destLen: puLongf; source : pbytef; sourceLen: uLong; level: integer): integer; cdecl; external libz name 'compress2';
function uncompress(dest: pbytef; destLen: puLongf; source : pbytef; sourceLen: uLong): integer; cdecl; external libz name 'uncompress';
function gzopen(path: pchar; mode: pchar): gzFile; cdecl; external libz name 'gzopen';
function gzdopen(fd: integer; mode: pchar): gzFile; cdecl; external libz name 'gzdopen';
function gzsetparams(thefile: gzFile; level: integer; strategy: integer): integer; cdecl; external libz name 'gzsetparams';
function gzread(thefile: gzFile; buf: pointer; len: cardinal): integer; cdecl; external libz name 'gzread';
function gzwrite(thefile: gzFile; buf: pointer; len: cardinal): integer; cdecl; external libz name 'gzwrite';
function gzprintf(thefile: gzFile; format: pbytef; args: array of const): integer; cdecl; external libz name 'gzprintf';
function gzputs(thefile: gzFile; s: pbytef): integer; cdecl; external libz name 'gzputs';
function gzgets(thefile: gzFile; buf: pbytef; len: integer): pchar; cdecl; external libz name 'gzgets';
function gzputc(thefile: gzFile; c: integer): integer; cdecl; external libz name 'gzputc';
function gzgetc(thefile: gzFile): integer; cdecl; external libz name 'gzgetc';
function gzflush(thefile: gzFile; flush: integer): integer; cdecl; external libz name 'gzflush';
function gzseek(thefile: gzFile; offset: z_off_t; whence: integer): z_off_t; cdecl; external libz name 'gzseek';
function gzrewind(thefile: gzFile): integer; cdecl; external libz name 'gzrewind';
function gztell(thefile: gzFile): z_off_t; cdecl; external libz name 'gztell';
function gzeof(thefile: gzFile): integer; cdecl; external libz name 'gzeof';
function gzclose(thefile: gzFile): integer; cdecl; external libz name 'gzclose';
function gzerror(thefile: gzFile; var errnum: integer): pchar; cdecl; external libz name 'gzerror';
function adler32(adler: uLong; buf: pbytef; len: uInt): uLong; cdecl; external libz name 'adler32';
function crc32(crc: uLong; buf: pbytef; len: uInt): uLong; cdecl; external libz name 'crc32';
function deflateInit_(var strm: TZStream; level: integer; version: pchar; stream_size: integer): integer; cdecl; external libz name 'deflateInit_';
function deflateInit(var strm: TZStream; level : integer) : integer;
function inflateInit_(var strm: TZStream; version: pchar; stream_size: integer): integer; cdecl; external libz name 'inflateInit_';
function inflateInit(var strm:TZStream) : integer;
function deflateInit2_(var strm: TZStream; level: integer; method: integer; windowBits: integer; memLevel: integer; strategy: integer; version: pchar; stream_size: integer): integer; cdecl; external libz name 'deflateInit2_';
function deflateInit2(var strm: TZStream; level, method, windowBits, memLevel, strategy: integer): integer;
function inflateInit2_(var strm: TZStream; windowBits: integer; version: pchar; stream_size: integer): integer; cdecl; external libz name 'inflateInit2_';
function inflateInit2(var strm: TZStream; windowBits: integer): integer;
function zErrorpchar(err: integer): pchar; cdecl; external libz name 'zError';
function zError(err: integer): string;
function inflateSyncPoint(z: PZstream): integer; cdecl; external libz name 'inflateSyncPoint';
function get_crc_table(): pointer; cdecl; external libz name 'get_crc_table';
function zlibAllocMem(AppData: Pointer; Items, Size: Integer): Pointer; cdecl;
procedure zlibFreeMem(AppData, Block: Pointer); cdecl;
implementation
function zlibversion(): string;
begin
zlibversion := string(zlibversionpchar);
end;
function deflateInit(var strm: TZStream; level: integer) : integer;
begin
deflateInit := deflateInit_(strm, level, ZLIB_VERSION, sizeof(TZStream));
end;
function inflateInit(var strm: TZStream): integer;
begin
inflateInit := inflateInit_(strm, ZLIB_VERSION, sizeof(TZStream));
end;
function deflateInit2(var strm: TZStream; level, method, windowBits, memLevel, strategy: integer) : integer;
begin
deflateInit2 := deflateInit2_(strm, level, method, windowBits, memLevel, strategy, ZLIB_VERSION, sizeof(TZStream));
end;
function inflateInit2(var strm: TZStream; windowBits: integer): integer;
begin
inflateInit2 := inflateInit2_(strm, windowBits, ZLIB_VERSION, sizeof(TZStream));
end;
function zError(err: integer): string;
begin
zerror := string(zErrorpchar(err));
end;
function zlibAllocMem(AppData: Pointer; Items, Size: Integer): Pointer; cdecl;
begin
Result := GetMemory(Items * Size);
end;
procedure zlibFreeMem(AppData, Block: Pointer); cdecl;
begin
FreeMem(Block);
end;
end.
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