--- /dev/null
+(* example.c -- usage example of the zlib compression library
+ * Copyright (C) 1995-2003 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ *
+ * Pascal translation
+ * Copyright (C) 1998 by Jacques Nomssi Nzali.
+ * For conditions of distribution and use, see copyright notice in readme.txt
+ *
+ * Adaptation to the zlibpas interface
+ * Copyright (C) 2003 by Cosmin Truta.
+ * For conditions of distribution and use, see copyright notice in readme.txt
+ *)
+
+program example;
+
+{$DEFINE TEST_COMPRESS}
+{DO NOT $DEFINE TEST_GZIO}
+{$DEFINE TEST_DEFLATE}
+{$DEFINE TEST_INFLATE}
+{$DEFINE TEST_FLUSH}
+{$DEFINE TEST_SYNC}
+{$DEFINE TEST_DICT}
+
+uses SysUtils, zlibpas;
+
+const TESTFILE = 'foo.gz';
+
+(* "hello world" would be more standard, but the repeated "hello"
+ * stresses the compression code better, sorry...
+ *)
+const hello: PChar = 'hello, hello!';
+
+const dictionary: PChar = 'hello';
+
+var dictId: LongInt; (* Adler32 value of the dictionary *)
+
+procedure CHECK_ERR(err: Integer; msg: String);
+begin
+ if err <> Z_OK then
+ begin
+ WriteLn(msg, ' error: ', err);
+ Halt(1);
+ end;
+end;
+
+procedure EXIT_ERR(const msg: String);
+begin
+ WriteLn('Error: ', msg);
+ Halt(1);
+end;
+
+(* ===========================================================================
+ * Test compress and uncompress
+ *)
+{$IFDEF TEST_COMPRESS}
+procedure test_compress(compr: Pointer; comprLen: LongInt;
+ uncompr: Pointer; uncomprLen: LongInt);
+var err: Integer;
+ len: LongInt;
+begin
+ len := StrLen(hello)+1;
+
+ err := compress(compr, comprLen, hello, len);
+ CHECK_ERR(err, 'compress');
+
+ StrCopy(PChar(uncompr), 'garbage');
+
+ err := uncompress(uncompr, uncomprLen, compr, comprLen);
+ CHECK_ERR(err, 'uncompress');
+
+ if StrComp(PChar(uncompr), hello) <> 0 then
+ EXIT_ERR('bad uncompress')
+ else
+ WriteLn('uncompress(): ', PChar(uncompr));
+end;
+{$ENDIF}
+
+(* ===========================================================================
+ * Test read/write of .gz files
+ *)
+{$IFDEF TEST_GZIO}
+procedure test_gzio(const fname: PChar; (* compressed file name *)
+ uncompr: Pointer;
+ uncomprLen: LongInt);
+var err: Integer;
+ len: Integer;
+ zfile: gzFile;
+ pos: LongInt;
+begin
+ len := StrLen(hello)+1;
+
+ zfile := gzopen(fname, 'wb');
+ if zfile = NIL then
+ begin
+ WriteLn('gzopen error');
+ Halt(1);
+ end;
+ gzputc(zfile, 'h');
+ if gzputs(zfile, 'ello') <> 4 then
+ begin
+ WriteLn('gzputs err: ', gzerror(zfile, err));
+ Halt(1);
+ end;
+ {$IFDEF GZ_FORMAT_STRING}
+ if gzprintf(zfile, ', %s!', 'hello') <> 8 then
+ begin
+ WriteLn('gzprintf err: ', gzerror(zfile, err));
+ Halt(1);
+ end;
+ {$ELSE}
+ if gzputs(zfile, ', hello!') <> 8 then
+ begin
+ WriteLn('gzputs err: ', gzerror(zfile, err));
+ Halt(1);
+ end;
+ {$ENDIF}
+ gzseek(zfile, 1, SEEK_CUR); (* add one zero byte *)
+ gzclose(zfile);
+
+ zfile := gzopen(fname, 'rb');
+ if zfile = NIL then
+ begin
+ WriteLn('gzopen error');
+ Halt(1);
+ end;
+
+ StrCopy(PChar(uncompr), 'garbage');
+
+ if gzread(zfile, uncompr, uncomprLen) <> len then
+ begin
+ WriteLn('gzread err: ', gzerror(zfile, err));
+ Halt(1);
+ end;
+ if StrComp(PChar(uncompr), hello) <> 0 then
+ begin
+ WriteLn('bad gzread: ', PChar(uncompr));
+ Halt(1);
+ end
+ else
+ WriteLn('gzread(): ', PChar(uncompr));
+
+ pos := gzseek(zfile, -8, SEEK_CUR);
+ if (pos <> 6) or (gztell(zfile) <> pos) then
+ begin
+ WriteLn('gzseek error, pos=', pos, ', gztell=', gztell(zfile));
+ Halt(1);
+ end;
+
+ if gzgetc(zfile) <> ' ' then
+ begin
+ WriteLn('gzgetc error');
+ Halt(1);
+ end;
+
+ if gzungetc(' ', zfile) <> ' ' then
+ begin
+ WriteLn('gzungetc error');
+ Halt(1);
+ end;
+
+ gzgets(zfile, PChar(uncompr), uncomprLen);
+ uncomprLen := StrLen(PChar(uncompr));
+ if uncomprLen <> 7 then (* " hello!" *)
+ begin
+ WriteLn('gzgets err after gzseek: ', gzerror(zfile, err));
+ Halt(1);
+ end;
+ if StrComp(PChar(uncompr), hello + 6) <> 0 then
+ begin
+ WriteLn('bad gzgets after gzseek');
+ Halt(1);
+ end
+ else
+ WriteLn('gzgets() after gzseek: ', PChar(uncompr));
+
+ gzclose(zfile);
+end;
+{$ENDIF}
+
+(* ===========================================================================
+ * Test deflate with small buffers
+ *)
+{$IFDEF TEST_DEFLATE}
+procedure test_deflate(compr: Pointer; comprLen: LongInt);
+var c_stream: z_stream; (* compression stream *)
+ err: Integer;
+ len: LongInt;
+begin
+ len := StrLen(hello)+1;
+
+ c_stream.zalloc := NIL;
+ c_stream.zfree := NIL;
+ c_stream.opaque := NIL;
+
+ err := deflateInit(c_stream, Z_DEFAULT_COMPRESSION);
+ CHECK_ERR(err, 'deflateInit');
+
+ c_stream.next_in := hello;
+ c_stream.next_out := compr;
+
+ while (c_stream.total_in <> len) and
+ (c_stream.total_out < comprLen) do
+ begin
+ c_stream.avail_out := 1; { force small buffers }
+ c_stream.avail_in := 1;
+ err := deflate(c_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, 'deflate');
+ end;
+
+ (* Finish the stream, still forcing small buffers: *)
+ while TRUE do
+ begin
+ c_stream.avail_out := 1;
+ err := deflate(c_stream, Z_FINISH);
+ if err = Z_STREAM_END then
+ break;
+ CHECK_ERR(err, 'deflate');
+ end;
+
+ err := deflateEnd(c_stream);
+ CHECK_ERR(err, 'deflateEnd');
+end;
+{$ENDIF}
+
+(* ===========================================================================
+ * Test inflate with small buffers
+ *)
+{$IFDEF TEST_INFLATE}
+procedure test_inflate(compr: Pointer; comprLen : LongInt;
+ uncompr: Pointer; uncomprLen : LongInt);
+var err: Integer;
+ d_stream: z_stream; (* decompression stream *)
+begin
+ StrCopy(PChar(uncompr), 'garbage');
+
+ d_stream.zalloc := NIL;
+ d_stream.zfree := NIL;
+ d_stream.opaque := NIL;
+
+ d_stream.next_in := compr;
+ d_stream.avail_in := 0;
+ d_stream.next_out := uncompr;
+
+ err := inflateInit(d_stream);
+ CHECK_ERR(err, 'inflateInit');
+
+ while (d_stream.total_out < uncomprLen) and
+ (d_stream.total_in < comprLen) do
+ begin
+ d_stream.avail_out := 1; (* force small buffers *)
+ d_stream.avail_in := 1;
+ err := inflate(d_stream, Z_NO_FLUSH);
+ if err = Z_STREAM_END then
+ break;
+ CHECK_ERR(err, 'inflate');
+ end;
+
+ err := inflateEnd(d_stream);
+ CHECK_ERR(err, 'inflateEnd');
+
+ if StrComp(PChar(uncompr), hello) <> 0 then
+ EXIT_ERR('bad inflate')
+ else
+ WriteLn('inflate(): ', PChar(uncompr));
+end;
+{$ENDIF}
+
+(* ===========================================================================
+ * Test deflate with large buffers and dynamic change of compression level
+ *)
+{$IFDEF TEST_DEFLATE}
+procedure test_large_deflate(compr: Pointer; comprLen: LongInt;
+ uncompr: Pointer; uncomprLen: LongInt);
+var c_stream: z_stream; (* compression stream *)
+ err: Integer;
+begin
+ c_stream.zalloc := NIL;
+ c_stream.zfree := NIL;
+ c_stream.opaque := NIL;
+
+ err := deflateInit(c_stream, Z_BEST_SPEED);
+ CHECK_ERR(err, 'deflateInit');
+
+ c_stream.next_out := compr;
+ c_stream.avail_out := Integer(comprLen);
+
+ (* At this point, uncompr is still mostly zeroes, so it should compress
+ * very well:
+ *)
+ c_stream.next_in := uncompr;
+ c_stream.avail_in := Integer(uncomprLen);
+ err := deflate(c_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, 'deflate');
+ if c_stream.avail_in <> 0 then
+ EXIT_ERR('deflate not greedy');
+
+ (* Feed in already compressed data and switch to no compression: *)
+ deflateParams(c_stream, Z_NO_COMPRESSION, Z_DEFAULT_STRATEGY);
+ c_stream.next_in := compr;
+ c_stream.avail_in := Integer(comprLen div 2);
+ err := deflate(c_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, 'deflate');
+
+ (* Switch back to compressing mode: *)
+ deflateParams(c_stream, Z_BEST_COMPRESSION, Z_FILTERED);
+ c_stream.next_in := uncompr;
+ c_stream.avail_in := Integer(uncomprLen);
+ err := deflate(c_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, 'deflate');
+
+ err := deflate(c_stream, Z_FINISH);
+ if err <> Z_STREAM_END then
+ EXIT_ERR('deflate should report Z_STREAM_END');
+
+ err := deflateEnd(c_stream);
+ CHECK_ERR(err, 'deflateEnd');
+end;
+{$ENDIF}
+
+(* ===========================================================================
+ * Test inflate with large buffers
+ *)
+{$IFDEF TEST_INFLATE}
+procedure test_large_inflate(compr: Pointer; comprLen: LongInt;
+ uncompr: Pointer; uncomprLen: LongInt);
+var err: Integer;
+ d_stream: z_stream; (* decompression stream *)
+begin
+ StrCopy(PChar(uncompr), 'garbage');
+
+ d_stream.zalloc := NIL;
+ d_stream.zfree := NIL;
+ d_stream.opaque := NIL;
+
+ d_stream.next_in := compr;
+ d_stream.avail_in := Integer(comprLen);
+
+ err := inflateInit(d_stream);
+ CHECK_ERR(err, 'inflateInit');
+
+ while TRUE do
+ begin
+ d_stream.next_out := uncompr; (* discard the output *)
+ d_stream.avail_out := Integer(uncomprLen);
+ err := inflate(d_stream, Z_NO_FLUSH);
+ if err = Z_STREAM_END then
+ break;
+ CHECK_ERR(err, 'large inflate');
+ end;
+
+ err := inflateEnd(d_stream);
+ CHECK_ERR(err, 'inflateEnd');
+
+ if d_stream.total_out <> 2 * uncomprLen + comprLen div 2 then
+ begin
+ WriteLn('bad large inflate: ', d_stream.total_out);
+ Halt(1);
+ end
+ else
+ WriteLn('large_inflate(): OK');
+end;
+{$ENDIF}
+
+(* ===========================================================================
+ * Test deflate with full flush
+ *)
+{$IFDEF TEST_FLUSH}
+procedure test_flush(compr: Pointer; var comprLen : LongInt);
+var c_stream: z_stream; (* compression stream *)
+ err: Integer;
+ len: Integer;
+begin
+ len := StrLen(hello)+1;
+
+ c_stream.zalloc := NIL;
+ c_stream.zfree := NIL;
+ c_stream.opaque := NIL;
+
+ err := deflateInit(c_stream, Z_DEFAULT_COMPRESSION);
+ CHECK_ERR(err, 'deflateInit');
+
+ c_stream.next_in := hello;
+ c_stream.next_out := compr;
+ c_stream.avail_in := 3;
+ c_stream.avail_out := Integer(comprLen);
+ err := deflate(c_stream, Z_FULL_FLUSH);
+ CHECK_ERR(err, 'deflate');
+
+ Inc(PByteArray(compr)^[3]); (* force an error in first compressed block *)
+ c_stream.avail_in := len - 3;
+
+ err := deflate(c_stream, Z_FINISH);
+ if err <> Z_STREAM_END then
+ CHECK_ERR(err, 'deflate');
+
+ err := deflateEnd(c_stream);
+ CHECK_ERR(err, 'deflateEnd');
+
+ comprLen := c_stream.total_out;
+end;
+{$ENDIF}
+
+(* ===========================================================================
+ * Test inflateSync()
+ *)
+{$IFDEF TEST_SYNC}
+procedure test_sync(compr: Pointer; comprLen: LongInt;
+ uncompr: Pointer; uncomprLen : LongInt);
+var err: Integer;
+ d_stream: z_stream; (* decompression stream *)
+begin
+ StrCopy(PChar(uncompr), 'garbage');
+
+ d_stream.zalloc := NIL;
+ d_stream.zfree := NIL;
+ d_stream.opaque := NIL;
+
+ d_stream.next_in := compr;
+ d_stream.avail_in := 2; (* just read the zlib header *)
+
+ err := inflateInit(d_stream);
+ CHECK_ERR(err, 'inflateInit');
+
+ d_stream.next_out := uncompr;
+ d_stream.avail_out := Integer(uncomprLen);
+
+ inflate(d_stream, Z_NO_FLUSH);
+ CHECK_ERR(err, 'inflate');
+
+ d_stream.avail_in := Integer(comprLen-2); (* read all compressed data *)
+ err := inflateSync(d_stream); (* but skip the damaged part *)
+ CHECK_ERR(err, 'inflateSync');
+
+ err := inflate(d_stream, Z_FINISH);
+ if err <> Z_DATA_ERROR then
+ EXIT_ERR('inflate should report DATA_ERROR');
+ (* Because of incorrect adler32 *)
+
+ err := inflateEnd(d_stream);
+ CHECK_ERR(err, 'inflateEnd');
+
+ WriteLn('after inflateSync(): hel', PChar(uncompr));
+end;
+{$ENDIF}
+
+(* ===========================================================================
+ * Test deflate with preset dictionary
+ *)
+{$IFDEF TEST_DICT}
+procedure test_dict_deflate(compr: Pointer; comprLen: LongInt);
+var c_stream: z_stream; (* compression stream *)
+ err: Integer;
+begin
+ c_stream.zalloc := NIL;
+ c_stream.zfree := NIL;
+ c_stream.opaque := NIL;
+
+ err := deflateInit(c_stream, Z_BEST_COMPRESSION);
+ CHECK_ERR(err, 'deflateInit');
+
+ err := deflateSetDictionary(c_stream, dictionary, StrLen(dictionary));
+ CHECK_ERR(err, 'deflateSetDictionary');
+
+ dictId := c_stream.adler;
+ c_stream.next_out := compr;
+ c_stream.avail_out := Integer(comprLen);
+
+ c_stream.next_in := hello;
+ c_stream.avail_in := StrLen(hello)+1;
+
+ err := deflate(c_stream, Z_FINISH);
+ if err <> Z_STREAM_END then
+ EXIT_ERR('deflate should report Z_STREAM_END');
+
+ err := deflateEnd(c_stream);
+ CHECK_ERR(err, 'deflateEnd');
+end;
+{$ENDIF}
+
+(* ===========================================================================
+ * Test inflate with a preset dictionary
+ *)
+{$IFDEF TEST_DICT}
+procedure test_dict_inflate(compr: Pointer; comprLen: LongInt;
+ uncompr: Pointer; uncomprLen: LongInt);
+var err: Integer;
+ d_stream: z_stream; (* decompression stream *)
+begin
+ StrCopy(PChar(uncompr), 'garbage');
+
+ d_stream.zalloc := NIL;
+ d_stream.zfree := NIL;
+ d_stream.opaque := NIL;
+
+ d_stream.next_in := compr;
+ d_stream.avail_in := Integer(comprLen);
+
+ err := inflateInit(d_stream);
+ CHECK_ERR(err, 'inflateInit');
+
+ d_stream.next_out := uncompr;
+ d_stream.avail_out := Integer(uncomprLen);
+
+ while TRUE do
+ begin
+ err := inflate(d_stream, Z_NO_FLUSH);
+ if err = Z_STREAM_END then
+ break;
+ if err = Z_NEED_DICT then
+ begin
+ if d_stream.adler <> dictId then
+ EXIT_ERR('unexpected dictionary');
+ err := inflateSetDictionary(d_stream, dictionary, StrLen(dictionary));
+ end;
+ CHECK_ERR(err, 'inflate with dict');
+ end;
+
+ err := inflateEnd(d_stream);
+ CHECK_ERR(err, 'inflateEnd');
+
+ if StrComp(PChar(uncompr), hello) <> 0 then
+ EXIT_ERR('bad inflate with dict')
+ else
+ WriteLn('inflate with dictionary: ', PChar(uncompr));
+end;
+{$ENDIF}
+
+var compr, uncompr: Pointer;
+ comprLen, uncomprLen: LongInt;
+
+begin
+ if zlibVersion^ <> ZLIB_VERSION[1] then
+ EXIT_ERR('Incompatible zlib version');
+
+ WriteLn('zlib version: ', zlibVersion);
+ WriteLn('zlib compile flags: ', Format('0x%x', [zlibCompileFlags]));
+
+ comprLen := 10000 * SizeOf(Integer); (* don't overflow on MSDOS *)
+ uncomprLen := comprLen;
+ GetMem(compr, comprLen);
+ GetMem(uncompr, uncomprLen);
+ if (compr = NIL) or (uncompr = NIL) then
+ EXIT_ERR('Out of memory');
+ (* compr and uncompr are cleared to avoid reading uninitialized
+ * data and to ensure that uncompr compresses well.
+ *)
+ FillChar(compr^, comprLen, 0);
+ FillChar(uncompr^, uncomprLen, 0);
+
+ {$IFDEF TEST_COMPRESS}
+ WriteLn('** Testing compress');
+ test_compress(compr, comprLen, uncompr, uncomprLen);
+ {$ENDIF}
+
+ {$IFDEF TEST_GZIO}
+ WriteLn('** Testing gzio');
+ if ParamCount >= 1 then
+ test_gzio(ParamStr(1), uncompr, uncomprLen)
+ else
+ test_gzio(TESTFILE, uncompr, uncomprLen);
+ {$ENDIF}
+
+ {$IFDEF TEST_DEFLATE}
+ WriteLn('** Testing deflate with small buffers');
+ test_deflate(compr, comprLen);
+ {$ENDIF}
+ {$IFDEF TEST_INFLATE}
+ WriteLn('** Testing inflate with small buffers');
+ test_inflate(compr, comprLen, uncompr, uncomprLen);
+ {$ENDIF}
+
+ {$IFDEF TEST_DEFLATE}
+ WriteLn('** Testing deflate with large buffers');
+ test_large_deflate(compr, comprLen, uncompr, uncomprLen);
+ {$ENDIF}
+ {$IFDEF TEST_INFLATE}
+ WriteLn('** Testing inflate with large buffers');
+ test_large_inflate(compr, comprLen, uncompr, uncomprLen);
+ {$ENDIF}
+
+ {$IFDEF TEST_FLUSH}
+ WriteLn('** Testing deflate with full flush');
+ test_flush(compr, comprLen);
+ {$ENDIF}
+ {$IFDEF TEST_SYNC}
+ WriteLn('** Testing inflateSync');
+ test_sync(compr, comprLen, uncompr, uncomprLen);
+ {$ENDIF}
+ comprLen := uncomprLen;
+
+ {$IFDEF TEST_DICT}
+ WriteLn('** Testing deflate and inflate with preset dictionary');
+ test_dict_deflate(compr, comprLen);
+ test_dict_inflate(compr, comprLen, uncompr, uncomprLen);
+ {$ENDIF}
+
+ FreeMem(compr, comprLen);
+ FreeMem(uncompr, uncomprLen);
+end.
projects / ossec-hids.git / blobdiff