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Comparing liblzf/lzf_d.c (file contents):
Revision 1.3 by pcg, Tue Dec 23 04:52:00 2003 UTC vs.
Revision 1.9 by root, Mon Nov 5 23:28:40 2007 UTC

1/* 1/*
2 * Copyright (c) 2000-2003 Marc Alexander Lehmann <pcg@goof.com> 2 * Copyright (c) 2000-2007 Marc Alexander Lehmann <schmorp@schmorp.de>
3 * 3 *
4 * Redistribution and use in source and binary forms, with or without modifica- 4 * Redistribution and use in source and binary forms, with or without modifica-
5 * tion, are permitted provided that the following conditions are met: 5 * tion, are permitted provided that the following conditions are met:
6 * 6 *
7 * 1. Redistributions of source code must retain the above copyright notice, 7 * 1. Redistributions of source code must retain the above copyright notice,
… …
9 * 9 *
10 * 2. Redistributions in binary form must reproduce the above copyright 10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the 11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution. 12 * documentation and/or other materials provided with the distribution.
13 * 13 *
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 15 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 16 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 17 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 18 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- 21 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 22 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE. 23 * OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 * Alternatively, the contents of this file may be used under the terms of
26 * the GNU General Public License ("GPL") version 2 or any later version,
27 * in which case the provisions of the GPL are applicable instead of
28 * the above. If you wish to allow the use of your version of this file
29 * only under the terms of the GPL and not to allow others to use your
30 * version of this file under the BSD license, indicate your decision
31 * by deleting the provisions above and replace them with the notice
32 * and other provisions required by the GPL. If you do not delete the
33 * provisions above, a recipient may use your version of this file under
34 * either the BSD or the GPL.
27 */ 35 */
28 36
29#include "lzfP.h" 37#include "lzfP.h"
30 38
31#if AVOID_ERRNO 39#if AVOID_ERRNO
32# define SET_ERRNO(n) 40# define SET_ERRNO(n)
33#else 41#else
34# include <errno.h> 42# include <errno.h>
35# define SET_ERRNO(n) errno = (n) 43# define SET_ERRNO(n) errno = (n)
44#endif
45
46#if (__i386 || __amd64) && __GNUC__ >= 3
47# define lzf_movsb(dst, src, len) \
48 asm ("rep movsb" \
49 : "=D" (dst), "=S" (src), "=c" (len) \
50 : "0" (dst), "1" (src), "2" (len));
36#endif 51#endif
37 52
38unsigned int 53unsigned int
39lzf_decompress (const void *const in_data, unsigned int in_len, 54lzf_decompress (const void *const in_data, unsigned int in_len,
40 void *out_data, unsigned int out_len) 55 void *out_data, unsigned int out_len)
… …
56 { 71 {
57 SET_ERRNO (E2BIG); 72 SET_ERRNO (E2BIG);
58 return 0; 73 return 0;
59 } 74 }
60 75
61#if USE_MEMCPY 76#if CHECK_INPUT
77 if (ip + ctrl > in_end)
78 {
79 SET_ERRNO (EINVAL);
80 return 0;
81 }
82#endif
83
84#ifdef lzf_movsb
62 memcpy (op, ip, ctrl); 85 lzf_movsb (op, ip, ctrl);
63 op += ctrl;
64 ip += ctrl;
65#else 86#else
66 do 87 do
67 *op++ = *ip++; 88 *op++ = *ip++;
68 while (--ctrl); 89 while (--ctrl);
69#endif 90#endif
… …
72 { 93 {
73 unsigned int len = ctrl >> 5; 94 unsigned int len = ctrl >> 5;
74 95
75 u8 *ref = op - ((ctrl & 0x1f) << 8) - 1; 96 u8 *ref = op - ((ctrl & 0x1f) << 8) - 1;
76 97
98#if CHECK_INPUT
99 if (ip >= in_end)
100 {
101 SET_ERRNO (EINVAL);
102 return 0;
103 }
104#endif
77 if (len == 7) 105 if (len == 7)
106 {
78 len += *ip++; 107 len += *ip++;
108#if CHECK_INPUT
109 if (ip >= in_end)
110 {
111 SET_ERRNO (EINVAL);
112 return 0;
113 }
114#endif
79 115 }
116
80 ref -= *ip++; 117 ref -= *ip++;
81 118
82 if (op + len + 2 > out_end) 119 if (op + len + 2 > out_end)
83 { 120 {
84 SET_ERRNO (E2BIG); 121 SET_ERRNO (E2BIG);
… …
89 { 126 {
90 SET_ERRNO (EINVAL); 127 SET_ERRNO (EINVAL);
91 return 0; 128 return 0;
92 } 129 }
93 130
131#ifdef lzf_movsb
132 len += 2;
133 lzf_movsb (op, ref, len);
134#else
94 *op++ = *ref++; 135 *op++ = *ref++;
95 *op++ = *ref++; 136 *op++ = *ref++;
96 137
97 do 138 do
98 *op++ = *ref++; 139 *op++ = *ref++;
99 while (--len); 140 while (--len);
141#endif
100 } 142 }
101 } 143 }
102 while (op < out_end && ip < in_end); 144 while (ip < in_end);
103 145
104 return op - (u8 *)out_data; 146 return op - (u8 *)out_data;
105} 147}
106 148

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