1 | /* |
1 | /* |
2 | * Copyright (c) 2000-2005 Marc Alexander Lehmann <schmorp@schmorp.de> |
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, |
8 | * this list of conditions and the following disclaimer. |
8 | * this list of conditions and the following disclaimer. |
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 | * |
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14 | * 3. The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
13 | * |
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- |
… | |
… | |
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. |
27 | * |
24 | * |
28 | * Alternatively, the contents of this file may be used under the terms of |
25 | * Alternatively, the contents of this file may be used under the terms of |
29 | * the GNU General Public License version 2 (the "GPL"), in which case the |
26 | * the GNU General Public License ("GPL") version 2 or any later version, |
30 | * provisions of the GPL are applicable instead of the above. If you wish to |
27 | * in which case the provisions of the GPL are applicable instead of |
31 | * allow the use of your version of this file only under the terms of the |
28 | * the above. If you wish to allow the use of your version of this file |
32 | * GPL and not to allow others to use your version of this file under the |
29 | * only under the terms of the GPL and not to allow others to use your |
33 | * BSD license, indicate your decision by deleting the provisions above and |
30 | * version of this file under the BSD license, indicate your decision |
34 | * replace them with the notice and other provisions required by the GPL. If |
31 | * by deleting the provisions above and replace them with the notice |
35 | * you do not delete the provisions above, a recipient may use your version |
32 | * and other provisions required by the GPL. If you do not delete the |
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33 | * provisions above, a recipient may use your version of this file under |
36 | * of this file under either the BSD or the GPL. |
34 | * either the BSD or the GPL. |
37 | */ |
35 | */ |
38 | |
36 | |
39 | #include "lzfP.h" |
37 | #include "lzfP.h" |
40 | |
38 | |
41 | #if AVOID_ERRNO |
39 | #if AVOID_ERRNO |
42 | # define SET_ERRNO(n) |
40 | # define SET_ERRNO(n) |
43 | #else |
41 | #else |
44 | # include <errno.h> |
42 | # include <errno.h> |
45 | # define SET_ERRNO(n) errno = (n) |
43 | # define SET_ERRNO(n) errno = (n) |
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44 | #endif |
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45 | |
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46 | #if (__i386 || __amd64) && __GNUC__ >= 3 |
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47 | # define lzf_movsb(dst, src, len) \ |
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48 | asm ("rep movsb" \ |
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49 | : "=D" (dst), "=S" (src), "=c" (len) \ |
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50 | : "0" (dst), "1" (src), "2" (len)); |
46 | #endif |
51 | #endif |
47 | |
52 | |
48 | unsigned int |
53 | unsigned int |
49 | lzf_decompress (const void *const in_data, unsigned int in_len, |
54 | lzf_decompress (const void *const in_data, unsigned int in_len, |
50 | void *out_data, unsigned int out_len) |
55 | void *out_data, unsigned int out_len) |
… | |
… | |
66 | { |
71 | { |
67 | SET_ERRNO (E2BIG); |
72 | SET_ERRNO (E2BIG); |
68 | return 0; |
73 | return 0; |
69 | } |
74 | } |
70 | |
75 | |
71 | #if USE_MEMCPY |
76 | #if CHECK_INPUT |
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77 | if (ip + ctrl > in_end) |
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78 | { |
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79 | SET_ERRNO (EINVAL); |
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80 | return 0; |
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81 | } |
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82 | #endif |
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83 | |
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84 | #ifdef lzf_movsb |
72 | memcpy (op, ip, ctrl); |
85 | lzf_movsb (op, ip, ctrl); |
73 | op += ctrl; |
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74 | ip += ctrl; |
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75 | #else |
86 | #else |
76 | do |
87 | do |
77 | *op++ = *ip++; |
88 | *op++ = *ip++; |
78 | while (--ctrl); |
89 | while (--ctrl); |
79 | #endif |
90 | #endif |
… | |
… | |
82 | { |
93 | { |
83 | unsigned int len = ctrl >> 5; |
94 | unsigned int len = ctrl >> 5; |
84 | |
95 | |
85 | u8 *ref = op - ((ctrl & 0x1f) << 8) - 1; |
96 | u8 *ref = op - ((ctrl & 0x1f) << 8) - 1; |
86 | |
97 | |
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98 | #if CHECK_INPUT |
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99 | if (ip >= in_end) |
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100 | { |
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101 | SET_ERRNO (EINVAL); |
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102 | return 0; |
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103 | } |
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104 | #endif |
87 | if (len == 7) |
105 | if (len == 7) |
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106 | { |
88 | len += *ip++; |
107 | len += *ip++; |
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108 | #if CHECK_INPUT |
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109 | if (ip >= in_end) |
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110 | { |
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111 | SET_ERRNO (EINVAL); |
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112 | return 0; |
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113 | } |
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114 | #endif |
89 | |
115 | } |
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116 | |
90 | ref -= *ip++; |
117 | ref -= *ip++; |
91 | |
118 | |
92 | if (op + len + 2 > out_end) |
119 | if (op + len + 2 > out_end) |
93 | { |
120 | { |
94 | SET_ERRNO (E2BIG); |
121 | SET_ERRNO (E2BIG); |
… | |
… | |
99 | { |
126 | { |
100 | SET_ERRNO (EINVAL); |
127 | SET_ERRNO (EINVAL); |
101 | return 0; |
128 | return 0; |
102 | } |
129 | } |
103 | |
130 | |
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131 | #ifdef lzf_movsb |
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132 | len += 2; |
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133 | lzf_movsb (op, ref, len); |
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134 | #else |
104 | *op++ = *ref++; |
135 | *op++ = *ref++; |
105 | *op++ = *ref++; |
136 | *op++ = *ref++; |
106 | |
137 | |
107 | do |
138 | do |
108 | *op++ = *ref++; |
139 | *op++ = *ref++; |
109 | while (--len); |
140 | while (--len); |
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141 | #endif |
110 | } |
142 | } |
111 | } |
143 | } |
112 | while (op < out_end && ip < in_end); |
144 | while (ip < in_end); |
113 | |
145 | |
114 | return op - (u8 *)out_data; |
146 | return op - (u8 *)out_data; |
115 | } |
147 | } |
116 | |
148 | |