1 /*
2 * THIS FILE IS NOT IDENTICAL TO THE ORIGINAL
3 * FROM THE BZIP2 DISTRIBUTION.
4 *
5 * It has been modified, mainly to break the library
6 * into smaller pieces.
7 *
8 * Russ Cox
9 * rsc@plan9.bell-labs.com
10 * July 2000
11 */
12
13 /*-------------------------------------------------------------*/
14 /*--- Library top-level functions. ---*/
15 /*--- bzlib.c ---*/
16 /*-------------------------------------------------------------*/
17
18 /*--
19 This file is a part of bzip2 and/or libbzip2, a program and
20 library for lossless, block-sorting data compression.
21
22 Copyright (C) 1996-2000 Julian R Seward. All rights reserved.
23
24 Redistribution and use in source and binary forms, with or without
25 modification, are permitted provided that the following conditions
26 are met:
27
28 1. Redistributions of source code must retain the above copyright
29 notice, this list of conditions and the following disclaimer.
30
31 2. The origin of this software must not be misrepresented; you must
32 not claim that you wrote the original software. If you use this
33 software in a product, an acknowledgment in the product
34 documentation would be appreciated but is not required.
35
36 3. Altered source versions must be plainly marked as such, and must
37 not be misrepresented as being the original software.
38
39 4. The name of the author may not be used to endorse or promote
40 products derived from this software without specific prior written
41 permission.
42
43 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
44 OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
45 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
47 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
49 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
50 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
51 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
52 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
53 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54
55 Julian Seward, Cambridge, UK.
56 jseward@acm.org
57 bzip2/libbzip2 version 1.0 of 21 March 2000
58
59 This program is based on (at least) the work of:
60 Mike Burrows
61 David Wheeler
62 Peter Fenwick
63 Alistair Moffat
64 Radford Neal
65 Ian H. Witten
66 Robert Sedgewick
67 Jon L. Bentley
68
69 For more information on these sources, see the manual.
70 --*/
71
72 /*--
73 CHANGES
74 ~~~~~~~
75 0.9.0 -- original version.
76
77 0.9.0a/b -- no changes in this file.
78
79 0.9.0c
80 * made zero-length BZ_FLUSH work correctly in bzCompress().
81 * fixed bzWrite/bzRead to ignore zero-length requests.
82 * fixed bzread to correctly handle read requests after EOF.
83 * wrong parameter order in call to bzDecompressInit in
84 bzBuffToBuffDecompress. Fixed.
85 --*/
86
87 #include "os.h"
88 #include "bzlib.h"
89 #include "bzlib_private.h"
90
91 /*---------------------------------------------------*/
bz_config_ok(void)92 int bz_config_ok ( void )
93 {
94 if (sizeof(int) != 4) return 0;
95 if (sizeof(short) != 2) return 0;
96 if (sizeof(char) != 1) return 0;
97 return 1;
98 }
99
100 /*---------------------------------------------------*/
default_bzalloc(void * opaque,Int32 items,Int32 size)101 void* default_bzalloc ( void* opaque, Int32 items, Int32 size )
102 {
103 void* v = malloc ( items * size );
104 return v;
105 }
106
default_bzfree(void * opaque,void * addr)107 void default_bzfree ( void* opaque, void* addr )
108 {
109 if (addr != NULL) free ( addr );
110 }
111
112 /* rsc added this: where did the original go? */
bz_internal_error(int errcode)113 void bz_internal_error( int errcode )
114 {
115 exit(1);
116 }
117