1
2/*-----------------------------------------------------------*/
3/*--- A block-sorting, lossless compressor bzip2.c ---*/
4/*-----------------------------------------------------------*/
5
6/*--
7 This file is a part of bzip2 and/or libbzip2, a program and
8 library for lossless, block-sorting data compression.
9
10 Copyright (C) 1996-2005 Julian R Seward. All rights reserved.
11
12 Redistribution and use in source and binary forms, with or without
13 modification, are permitted provided that the following conditions
14 are met:
15
16 1. Redistributions of source code must retain the above copyright
17 notice, this list of conditions and the following disclaimer.
18

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36 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
37 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
38 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
39 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
40 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
41 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42
43 Julian Seward, Cambridge, UK.
44 jseward@bzip.org
45 bzip2/libbzip2 version 1.0 of 21 March 2000
46
47 This program is based on (at least) the work of:
48 Mike Burrows
49 David Wheeler
50 Peter Fenwick
51 Alistair Moffat
52 Radford Neal

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520static
521Bool uncompressStream ( FILE *zStream, FILE *stream )
522{
523 BZFILE* bzf = NULL;
524 Int32 bzerr, bzerr_dummy, ret, nread, streamNo, i;
525 UChar obuf[5000];
526 UChar unused[BZ_MAX_UNUSED];
527 Int32 nUnused;
528 void* unusedTmpV;
529 UChar* unusedTmp;
530
531 nUnused = 0;
532 streamNo = 0;
533
534 SET_BINARY_MODE(stream);
535 SET_BINARY_MODE(zStream);
536

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550 nread = BZ2_bzRead ( &bzerr, bzf, obuf, 5000 );
551 if (bzerr == BZ_DATA_ERROR_MAGIC) goto trycat;
552 if ((bzerr == BZ_OK || bzerr == BZ_STREAM_END) && nread > 0)
553 fwrite ( obuf, sizeof(UChar), nread, stream );
554 if (ferror(stream)) goto errhandler_io;
555 }
556 if (bzerr != BZ_STREAM_END) goto errhandler;
557
558 BZ2_bzReadGetUnused ( &bzerr, bzf, &unusedTmpV, &nUnused );
559 if (bzerr != BZ_OK) panic ( "decompress:bzReadGetUnused" );
560
561 unusedTmp = (UChar*)unusedTmpV;
562 for (i = 0; i < nUnused; i++) unused[i] = unusedTmp[i];
563
564 BZ2_bzReadClose ( &bzerr, bzf );
565 if (bzerr != BZ_OK) panic ( "decompress:bzReadGetUnused" );
566
567 if (nUnused == 0 && myfeof(zStream)) break;
568 }
569

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636static
637Bool testStream ( FILE *zStream )
638{
639 BZFILE* bzf = NULL;
640 Int32 bzerr, bzerr_dummy, ret, nread, streamNo, i;
641 UChar obuf[5000];
642 UChar unused[BZ_MAX_UNUSED];
643 Int32 nUnused;
644 void* unusedTmpV;
645 UChar* unusedTmp;
646
647 nUnused = 0;
648 streamNo = 0;
649
650 SET_BINARY_MODE(zStream);
651 if (ferror(zStream)) goto errhandler_io;
652

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660 streamNo++;
661
662 while (bzerr == BZ_OK) {
663 nread = BZ2_bzRead ( &bzerr, bzf, obuf, 5000 );
664 if (bzerr == BZ_DATA_ERROR_MAGIC) goto errhandler;
665 }
666 if (bzerr != BZ_STREAM_END) goto errhandler;
667
668 BZ2_bzReadGetUnused ( &bzerr, bzf, &unusedTmpV, &nUnused );
669 if (bzerr != BZ_OK) panic ( "test:bzReadGetUnused" );
670
671 unusedTmp = (UChar*)unusedTmpV;
672 for (i = 0; i < nUnused; i++) unused[i] = unusedTmp[i];
673
674 BZ2_bzReadClose ( &bzerr, bzf );
675 if (bzerr != BZ_OK) panic ( "test:bzReadGetUnused" );
676 if (nUnused == 0 && myfeof(zStream)) break;
677
678 }
679

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827/*---------------------------------------------*/
828static
829void panic ( Char* s )
830{
831 fprintf ( stderr,
832 "\n%s: PANIC -- internal consistency error:\n"
833 "\t%s\n"
834 "\tThis is a BUG. Please report it to me at:\n"
835 "\tjseward@bzip.org\n",
836 progName, s );
837 showFileNames();
838 cleanUpAndFail( 3 );
839}
840
841
842/*---------------------------------------------*/
843static

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907 " (1) This computer has unreliable memory or cache hardware\n"
908 " (a surprisingly common problem; try a different machine.)\n"
909 " (2) A bug in the compiler used to create this executable\n"
910 " (unlikely, if you didn't compile bzip2 yourself.)\n"
911 " (3) A real bug in bzip2 -- I hope this should never be the case.\n"
912 " The user's manual, Section 4.3, has more info on (1) and (2).\n"
913 " \n"
914 " If you suspect this is a bug in bzip2, or are unsure about (1)\n"
915 " or (2), feel free to report it to me at: jseward@bzip.org.\n"
916 " Section 4.3 of the user's manual describes the info a useful\n"
917 " bug report should have. If the manual is available on your\n"
918 " system, please try and read it before mailing me. If you don't\n"
919 " have the manual or can't be bothered to read it, mail me anyway.\n"
920 "\n",
921 progName );
922 else
923 fprintf (

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930 " (2) This computer has unreliable memory or cache hardware\n"
931 " (a surprisingly common problem; try a different machine.)\n"
932 " (3) A bug in the compiler used to create this executable\n"
933 " (unlikely, if you didn't compile bzip2 yourself.)\n"
934 " (4) A real bug in bzip2 -- I hope this should never be the case.\n"
935 " The user's manual, Section 4.3, has more info on (2) and (3).\n"
936 " \n"
937 " If you suspect this is a bug in bzip2, or are unsure about (2)\n"
938 " or (3), feel free to report it to me at: jseward@bzip.org.\n"
939 " Section 4.3 of the user's manual describes the info a useful\n"
940 " bug report should have. If the manual is available on your\n"
941 " system, please try and read it before mailing me. If you don't\n"
942 " have the manual or can't be bothered to read it, mail me anyway.\n"
943 "\n",
944 progName );
945
946 showFileNames();

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1673static
1674void license ( void )
1675{
1676 fprintf ( stderr,
1677
1678 "bzip2, a block-sorting file compressor. "
1679 "Version %s.\n"
1680 " \n"
1681 " Copyright (C) 1996-2005 by Julian Seward.\n"
1682 " \n"
1683 " This program is free software; you can redistribute it and/or modify\n"
1684 " it under the terms set out in the LICENSE file, which is included\n"
1685 " in the bzip2-1.0 source distribution.\n"
1686 " \n"
1687 " This program is distributed in the hope that it will be useful,\n"
1688 " but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
1689 " MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"

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