1 |
root |
1.1 |
/* |
2 |
root |
1.11 |
* Copyright (c) 2000-2007 Marc Alexander Lehmann <schmorp@schmorp.de> |
3 |
root |
1.1 |
* |
4 |
|
|
* Redistribution and use in source and binary forms, with or without modifica- |
5 |
|
|
* tion, are permitted provided that the following conditions are met: |
6 |
|
|
* |
7 |
|
|
* 1. Redistributions of source code must retain the above copyright notice, |
8 |
|
|
* this list of conditions and the following disclaimer. |
9 |
|
|
* |
10 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright |
11 |
|
|
* notice, this list of conditions and the following disclaimer in the |
12 |
|
|
* documentation and/or other materials provided with the distribution. |
13 |
|
|
* |
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- |
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- |
18 |
|
|
* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
19 |
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
20 |
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
21 |
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
22 |
|
|
* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
23 |
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE. |
24 |
pcg |
1.7 |
* |
25 |
|
|
* Alternatively, the contents of this file may be used under the terms of |
26 |
root |
1.12 |
* 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. |
35 |
root |
1.1 |
*/ |
36 |
|
|
|
37 |
|
|
#ifndef LZF_H |
38 |
|
|
#define LZF_H |
39 |
|
|
|
40 |
|
|
/*********************************************************************** |
41 |
|
|
** |
42 |
|
|
** lzf -- an extremely fast/free compression/decompression-method |
43 |
|
|
** http://liblzf.plan9.de/ |
44 |
|
|
** |
45 |
|
|
** This algorithm is believed to be patent-free. |
46 |
|
|
** |
47 |
|
|
***********************************************************************/ |
48 |
|
|
|
49 |
root |
1.10 |
#define LZF_VERSION 0x0105 /* 1.5 */ |
50 |
|
|
|
51 |
root |
1.1 |
/* |
52 |
|
|
* Compress in_len bytes stored at the memory block starting at |
53 |
|
|
* in_data and write the result to out_data, up to a maximum length |
54 |
|
|
* of out_len bytes. |
55 |
|
|
* |
56 |
|
|
* If the output buffer is not large enough or any error occurs |
57 |
|
|
* return 0, otherwise return the number of bytes used (which might |
58 |
|
|
* be considerably larger than in_len, so it makes sense to always |
59 |
root |
1.8 |
* use out_len == in_len - 1), to ensure _some_ compression, and store |
60 |
|
|
* the data uncompressed otherwise. |
61 |
root |
1.1 |
* |
62 |
|
|
* lzf_compress might use different algorithms on different systems and |
63 |
root |
1.13 |
* even different runs, thus might result in different compressed strings |
64 |
root |
1.10 |
* depending on the phase of the moon or similar factors. However, all |
65 |
|
|
* these strings are architecture-independent and will result in the |
66 |
|
|
* original data when decompressed using lzf_decompress. |
67 |
root |
1.1 |
* |
68 |
|
|
* The buffers must not be overlapping. |
69 |
|
|
* |
70 |
pcg |
1.6 |
* If the option LZF_STATE_ARG is enabled, an extra argument must be |
71 |
root |
1.10 |
* supplied which is not reflected in this header file. Refer to lzfP.h |
72 |
|
|
* and lzf_c.c. |
73 |
pcg |
1.5 |
* |
74 |
root |
1.1 |
*/ |
75 |
|
|
unsigned int |
76 |
|
|
lzf_compress (const void *const in_data, unsigned int in_len, |
77 |
|
|
void *out_data, unsigned int out_len); |
78 |
|
|
|
79 |
|
|
/* |
80 |
|
|
* Decompress data compressed with some version of the lzf_compress |
81 |
|
|
* function and stored at location in_data and length in_len. The result |
82 |
|
|
* will be stored at out_data up to a maximum of out_len characters. |
83 |
|
|
* |
84 |
root |
1.3 |
* If the output buffer is not large enough to hold the decompressed |
85 |
root |
1.1 |
* data, a 0 is returned and errno is set to E2BIG. Otherwise the number |
86 |
|
|
* of decompressed bytes (i.e. the original length of the data) is |
87 |
|
|
* returned. |
88 |
|
|
* |
89 |
|
|
* If an error in the compressed data is detected, a zero is returned and |
90 |
|
|
* errno is set to EINVAL. |
91 |
|
|
* |
92 |
|
|
* This function is very fast, about as fast as a copying loop. |
93 |
|
|
*/ |
94 |
|
|
unsigned int |
95 |
|
|
lzf_decompress (const void *const in_data, unsigned int in_len, |
96 |
|
|
void *out_data, unsigned int out_len); |
97 |
|
|
|
98 |
|
|
#endif |
99 |
|
|
|