1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef DECOMPRESS_GENERIC_H 3#define DECOMPRESS_GENERIC_H 4 5typedef int (*decompress_fn) (unsigned char *inbuf, long len, 6 long (*fill)(void*, unsigned long), 7 long (*flush)(void*, unsigned long), 8 unsigned char *outbuf, 9 long *posp, 10 void(*error)(char *x)); 11 12/* inbuf - input buffer 13 *len - len of pre-read data in inbuf 14 *fill - function to fill inbuf when empty 15 *flush - function to write out outbuf 16 *outbuf - output buffer 17 *posp - if non-null, input position (number of bytes read) will be 18 * returned here 19 * 20 *If len != 0, inbuf should contain all the necessary input data, and fill 21 *should be NULL 22 *If len = 0, inbuf can be NULL, in which case the decompressor will allocate 23 *the input buffer. If inbuf != NULL it must be at least XXX_IOBUF_SIZE bytes. 24 *fill will be called (repeatedly...) to read data, at most XXX_IOBUF_SIZE 25 *bytes should be read per call. Replace XXX with the appropriate decompressor 26 *name, i.e. LZMA_IOBUF_SIZE. 27 * 28 *If flush = NULL, outbuf must be large enough to buffer all the expected 29 *output. If flush != NULL, the output buffer will be allocated by the 30 *decompressor (outbuf = NULL), and the flush function will be called to 31 *flush the output buffer at the appropriate time (decompressor and stream 32 *dependent). 33 */ 34 35 36/* Utility routine to detect the decompression method */ 37decompress_fn decompress_method(const unsigned char *inbuf, long len, 38 const char **name); 39 40#endif 41