| 1 | /* |
1 | /* |
| 2 | * Copyright (c) 2000-2008 Marc Alexander Lehmann <schmorp@schmorp.de> |
2 | * Copyright (c) 2000-2008 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 | * |
13 | * |
| 14 | * 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 |
| 15 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
15 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
| 16 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
16 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| 17 | * 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- |
| 18 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
18 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| … | |
… | |
| 53 | * in_data and write the result to out_data, up to a maximum length |
53 | * in_data and write the result to out_data, up to a maximum length |
| 54 | * of out_len bytes. |
54 | * of out_len bytes. |
| 55 | * |
55 | * |
| 56 | * If the output buffer is not large enough or any error occurs return 0, |
56 | * If the output buffer is not large enough or any error occurs return 0, |
| 57 | * otherwise return the number of bytes used, which might be considerably |
57 | * otherwise return the number of bytes used, which might be considerably |
| 58 | * more than in_len (but less than 104% of the original size), so it |
58 | * more than in_len (but less than 1 + 104% of the original size), so it |
| 59 | * makes sense to always use out_len == in_len - 1), to ensure _some_ |
59 | * makes sense to always use out_len == in_len - 1), to ensure _some_ |
| 60 | * compression, and store the data uncompressed otherwise (with a flag, of |
60 | * compression, and store the data uncompressed otherwise (with a flag, of |
| 61 | * course. |
61 | * course. |
| 62 | * |
62 | * |
| 63 | * lzf_compress might use different algorithms on different systems and |
63 | * lzf_compress might use different algorithms on different systems and |
| … | |
… | |
| 71 | * If the option LZF_STATE_ARG is enabled, an extra argument must be |
71 | * If the option LZF_STATE_ARG is enabled, an extra argument must be |
| 72 | * supplied which is not reflected in this header file. Refer to lzfP.h |
72 | * supplied which is not reflected in this header file. Refer to lzfP.h |
| 73 | * and lzf_c.c. |
73 | * and lzf_c.c. |
| 74 | * |
74 | * |
| 75 | */ |
75 | */ |
| 76 | unsigned int |
76 | unsigned int |
| 77 | lzf_compress (const void *const in_data, unsigned int in_len, |
77 | lzf_compress (const void *const in_data, unsigned int in_len, |
| 78 | void *out_data, unsigned int out_len); |
78 | void *out_data, unsigned int out_len); |
| 79 | |
79 | |
| 80 | /* |
80 | /* |
| 81 | * Decompress data compressed with some version of the lzf_compress |
81 | * Decompress data compressed with some version of the lzf_compress |
| … | |
… | |
| 90 | * If an error in the compressed data is detected, a zero is returned and |
90 | * If an error in the compressed data is detected, a zero is returned and |
| 91 | * errno is set to EINVAL. |
91 | * errno is set to EINVAL. |
| 92 | * |
92 | * |
| 93 | * This function is very fast, about as fast as a copying loop. |
93 | * This function is very fast, about as fast as a copying loop. |
| 94 | */ |
94 | */ |
| 95 | unsigned int |
95 | unsigned int |
| 96 | lzf_decompress (const void *const in_data, unsigned int in_len, |
96 | lzf_decompress (const void *const in_data, unsigned int in_len, |
| 97 | void *out_data, unsigned int out_len); |
97 | void *out_data, unsigned int out_len); |
| 98 | |
98 | |
| 99 | #endif |
99 | #endif |
| 100 | |
100 | |
