1 #ifndef DECOMPRESS_GENERIC_H
2 #define DECOMPRESS_GENERIC_H
3 
4 typedef int (*decompress_fn) (unsigned char *inbuf, int len,
5 			      int(*fill)(void*, unsigned int),
6 			      int(*flush)(void*, unsigned int),
7 			      unsigned char *outbuf,
8 			      int *posp,
9 			      void(*error)(char *x));
10 
11 /* inbuf   - input buffer
12  *len     - len of pre-read data in inbuf
13  *fill    - function to fill inbuf when empty
14  *flush   - function to write out outbuf
15  *outbuf  - output buffer
16  *posp    - if non-null, input position (number of bytes read) will be
17  *	  returned here
18  *
19  *If len != 0, inbuf should contain all the necessary input data, and fill
20  *should be NULL
21  *If len = 0, inbuf can be NULL, in which case the decompressor will allocate
22  *the input buffer.  If inbuf != NULL it must be at least XXX_IOBUF_SIZE bytes.
23  *fill will be called (repeatedly...) to read data, at most XXX_IOBUF_SIZE
24  *bytes should be read per call.  Replace XXX with the appropriate decompressor
25  *name, i.e. LZMA_IOBUF_SIZE.
26  *
27  *If flush = NULL, outbuf must be large enough to buffer all the expected
28  *output.  If flush != NULL, the output buffer will be allocated by the
29  *decompressor (outbuf = NULL), and the flush function will be called to
30  *flush the output buffer at the appropriate time (decompressor and stream
31  *dependent).
32  */
33 
34 
35 /* Utility routine to detect the decompression method */
36 decompress_fn decompress_method(const unsigned char *inbuf, int len,
37 				const char **name);
38 
39 #endif
40