| 1 | /* |
1 | /* |
| 2 | * Copyright (c) 2000-2003 Marc Alexander Lehmann <pcg@goof.com> |
2 | * Copyright (c) 2000-2005 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, |
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| 22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
24 | * 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 |
25 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | * |
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28 | * Alternatively, the contents of this file may be used under the terms of |
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29 | * the GNU General Public License version 2 (the "GPL"), in which case the |
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30 | * provisions of the GPL are applicable instead of the above. If you wish to |
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31 | * allow the use of your version of this file only under the terms of the |
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32 | * GPL and not to allow others to use your version of this file under the |
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33 | * BSD license, indicate your decision by deleting the provisions above and |
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34 | * replace them with the notice and other provisions required by the GPL. If |
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35 | * you do not delete the provisions above, a recipient may use your version |
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36 | * of this file under either the BSD or the GPL. |
| 27 | */ |
37 | */ |
| 28 | |
38 | |
| 29 | #include "lzfP.h" |
39 | #include "lzfP.h" |
| 30 | |
40 | |
| 31 | #if AVOID_ERRNO |
41 | #if AVOID_ERRNO |
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| 56 | { |
66 | { |
| 57 | SET_ERRNO (E2BIG); |
67 | SET_ERRNO (E2BIG); |
| 58 | return 0; |
68 | return 0; |
| 59 | } |
69 | } |
| 60 | |
70 | |
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71 | #if CHECK_INPUT |
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72 | if (ip + ctrl > in_end) |
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73 | { |
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74 | SET_ERRNO (EINVAL); |
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75 | return 0; |
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76 | } |
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77 | #endif |
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78 | |
| 61 | #if USE_MEMCPY |
79 | #if USE_MEMCPY |
| 62 | memcpy (op, ip, ctrl); |
80 | memcpy (op, ip, ctrl); |
| 63 | op += ctrl; |
81 | op += ctrl; |
| 64 | ip += ctrl; |
82 | ip += ctrl; |
| 65 | #else |
83 | #else |
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| 72 | { |
90 | { |
| 73 | unsigned int len = ctrl >> 5; |
91 | unsigned int len = ctrl >> 5; |
| 74 | |
92 | |
| 75 | u8 *ref = op - ((ctrl & 0x1f) << 8) - 1; |
93 | u8 *ref = op - ((ctrl & 0x1f) << 8) - 1; |
| 76 | |
94 | |
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95 | #if CHECK_INPUT |
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96 | if (ip >= in_end) |
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97 | { |
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98 | SET_ERRNO (EINVAL); |
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99 | return 0; |
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100 | } |
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101 | #endif |
| 77 | if (len == 7) |
102 | if (len == 7) |
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103 | { |
| 78 | len += *ip++; |
104 | len += *ip++; |
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105 | #if CHECK_INPUT |
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106 | if (ip >= in_end) |
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107 | { |
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108 | SET_ERRNO (EINVAL); |
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109 | return 0; |
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110 | } |
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111 | #endif |
| 79 | |
112 | } |
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113 | |
| 80 | ref -= *ip++; |
114 | ref -= *ip++; |
| 81 | |
115 | |
| 82 | if (op + len + 2 > out_end) |
116 | if (op + len + 2 > out_end) |
| 83 | { |
117 | { |
| 84 | SET_ERRNO (E2BIG); |
118 | SET_ERRNO (E2BIG); |
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| 97 | do |
131 | do |
| 98 | *op++ = *ref++; |
132 | *op++ = *ref++; |
| 99 | while (--len); |
133 | while (--len); |
| 100 | } |
134 | } |
| 101 | } |
135 | } |
| 102 | while (op < out_end && ip < in_end); |
136 | while (ip < in_end); |
| 103 | |
137 | |
| 104 | return op - (u8 *)out_data; |
138 | return op - (u8 *)out_data; |
| 105 | } |
139 | } |
| 106 | |
140 | |
