2 ff3adf60 2004-04-14 devnull * THIS FILE IS NOT IDENTICAL TO THE ORIGINAL
3 ff3adf60 2004-04-14 devnull * FROM THE BZIP2 DISTRIBUTION.
5 ff3adf60 2004-04-14 devnull * It has been modified, mainly to break the library
6 ff3adf60 2004-04-14 devnull * into smaller pieces.
8 ff3adf60 2004-04-14 devnull * Russ Cox
9 ff3adf60 2004-04-14 devnull * rsc@plan9.bell-labs.com
10 ff3adf60 2004-04-14 devnull * July 2000
13 ff3adf60 2004-04-14 devnull /*-------------------------------------------------------------*/
14 ff3adf60 2004-04-14 devnull /*--- Library top-level functions. ---*/
15 ff3adf60 2004-04-14 devnull /*--- bzlib.c ---*/
16 ff3adf60 2004-04-14 devnull /*-------------------------------------------------------------*/
19 ff3adf60 2004-04-14 devnull This file is a part of bzip2 and/or libbzip2, a program and
20 ff3adf60 2004-04-14 devnull library for lossless, block-sorting data compression.
22 ff3adf60 2004-04-14 devnull Copyright (C) 1996-2000 Julian R Seward. All rights reserved.
24 ff3adf60 2004-04-14 devnull Redistribution and use in source and binary forms, with or without
25 ff3adf60 2004-04-14 devnull modification, are permitted provided that the following conditions
28 ff3adf60 2004-04-14 devnull 1. Redistributions of source code must retain the above copyright
29 ff3adf60 2004-04-14 devnull notice, this list of conditions and the following disclaimer.
31 ff3adf60 2004-04-14 devnull 2. The origin of this software must not be misrepresented; you must
32 ff3adf60 2004-04-14 devnull not claim that you wrote the original software. If you use this
33 ff3adf60 2004-04-14 devnull software in a product, an acknowledgment in the product
34 ff3adf60 2004-04-14 devnull documentation would be appreciated but is not required.
36 ff3adf60 2004-04-14 devnull 3. Altered source versions must be plainly marked as such, and must
37 ff3adf60 2004-04-14 devnull not be misrepresented as being the original software.
39 ff3adf60 2004-04-14 devnull 4. The name of the author may not be used to endorse or promote
40 ff3adf60 2004-04-14 devnull products derived from this software without specific prior written
41 ff3adf60 2004-04-14 devnull permission.
43 ff3adf60 2004-04-14 devnull THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
44 ff3adf60 2004-04-14 devnull OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
45 ff3adf60 2004-04-14 devnull WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46 ff3adf60 2004-04-14 devnull ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
47 ff3adf60 2004-04-14 devnull DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48 ff3adf60 2004-04-14 devnull DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
49 ff3adf60 2004-04-14 devnull GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
50 ff3adf60 2004-04-14 devnull INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
51 ff3adf60 2004-04-14 devnull WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
52 ff3adf60 2004-04-14 devnull NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
53 ff3adf60 2004-04-14 devnull SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
55 ff3adf60 2004-04-14 devnull Julian Seward, Cambridge, UK.
56 ff3adf60 2004-04-14 devnull jseward@acm.org
57 ff3adf60 2004-04-14 devnull bzip2/libbzip2 version 1.0 of 21 March 2000
59 ff3adf60 2004-04-14 devnull This program is based on (at least) the work of:
60 ff3adf60 2004-04-14 devnull Mike Burrows
61 ff3adf60 2004-04-14 devnull David Wheeler
62 ff3adf60 2004-04-14 devnull Peter Fenwick
63 ff3adf60 2004-04-14 devnull Alistair Moffat
64 ff3adf60 2004-04-14 devnull Radford Neal
65 ff3adf60 2004-04-14 devnull Ian H. Witten
66 ff3adf60 2004-04-14 devnull Robert Sedgewick
67 ff3adf60 2004-04-14 devnull Jon L. Bentley
69 ff3adf60 2004-04-14 devnull For more information on these sources, see the manual.
75 ff3adf60 2004-04-14 devnull 0.9.0 -- original version.
77 ff3adf60 2004-04-14 devnull 0.9.0a/b -- no changes in this file.
80 ff3adf60 2004-04-14 devnull * made zero-length BZ_FLUSH work correctly in bzCompress().
81 ff3adf60 2004-04-14 devnull * fixed bzWrite/bzRead to ignore zero-length requests.
82 ff3adf60 2004-04-14 devnull * fixed bzread to correctly handle read requests after EOF.
83 ff3adf60 2004-04-14 devnull * wrong parameter order in call to bzDecompressInit in
84 ff3adf60 2004-04-14 devnull bzBuffToBuffDecompress. Fixed.
87 ff3adf60 2004-04-14 devnull #include "os.h"
88 ff3adf60 2004-04-14 devnull #include "bzlib.h"
89 ff3adf60 2004-04-14 devnull #include "bzlib_private.h"
91 ff3adf60 2004-04-14 devnull /*---------------------------------------------------*/
92 ff3adf60 2004-04-14 devnull int BZ_API(BZ2_bzBuffToBuffDecompress)
93 ff3adf60 2004-04-14 devnull ( char* dest,
94 ff3adf60 2004-04-14 devnull unsigned int* destLen,
95 ff3adf60 2004-04-14 devnull char* source,
96 ff3adf60 2004-04-14 devnull unsigned int sourceLen,
97 ff3adf60 2004-04-14 devnull int small,
98 ff3adf60 2004-04-14 devnull int verbosity )
100 ff3adf60 2004-04-14 devnull bz_stream strm;
101 ff3adf60 2004-04-14 devnull int ret;
103 ff3adf60 2004-04-14 devnull if (dest == NULL || destLen == NULL ||
104 ff3adf60 2004-04-14 devnull source == NULL ||
105 ff3adf60 2004-04-14 devnull (small != 0 && small != 1) ||
106 ff3adf60 2004-04-14 devnull verbosity < 0 || verbosity > 4)
107 ff3adf60 2004-04-14 devnull return BZ_PARAM_ERROR;
109 ff3adf60 2004-04-14 devnull strm.bzalloc = NULL;
110 ff3adf60 2004-04-14 devnull strm.bzfree = NULL;
111 ff3adf60 2004-04-14 devnull strm.opaque = NULL;
112 ff3adf60 2004-04-14 devnull ret = BZ2_bzDecompressInit ( &strm, verbosity, small );
113 ff3adf60 2004-04-14 devnull if (ret != BZ_OK) return ret;
115 ff3adf60 2004-04-14 devnull strm.next_in = source;
116 ff3adf60 2004-04-14 devnull strm.next_out = dest;
117 ff3adf60 2004-04-14 devnull strm.avail_in = sourceLen;
118 ff3adf60 2004-04-14 devnull strm.avail_out = *destLen;
120 ff3adf60 2004-04-14 devnull ret = BZ2_bzDecompress ( &strm );
121 ff3adf60 2004-04-14 devnull if (ret == BZ_OK) goto output_overflow_or_eof;
122 ff3adf60 2004-04-14 devnull if (ret != BZ_STREAM_END) goto errhandler;
124 ff3adf60 2004-04-14 devnull /* normal termination */
125 ff3adf60 2004-04-14 devnull *destLen -= strm.avail_out;
126 ff3adf60 2004-04-14 devnull BZ2_bzDecompressEnd ( &strm );
127 ff3adf60 2004-04-14 devnull return BZ_OK;
129 ff3adf60 2004-04-14 devnull output_overflow_or_eof:
130 ff3adf60 2004-04-14 devnull if (strm.avail_out > 0) {
131 ff3adf60 2004-04-14 devnull BZ2_bzDecompressEnd ( &strm );
132 ff3adf60 2004-04-14 devnull return BZ_UNEXPECTED_EOF;
133 ff3adf60 2004-04-14 devnull } else {
134 ff3adf60 2004-04-14 devnull BZ2_bzDecompressEnd ( &strm );
135 ff3adf60 2004-04-14 devnull return BZ_OUTBUFF_FULL;
138 ff3adf60 2004-04-14 devnull errhandler:
139 ff3adf60 2004-04-14 devnull BZ2_bzDecompressEnd ( &strm );
140 ff3adf60 2004-04-14 devnull return ret;
