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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef DECOMPRESS_GENERIC_H
#define DECOMPRESS_GENERIC_H
typedef int (*decompress_fn) (unsigned char *inbuf, long len,
long (*fill)(void*, unsigned long),
long (*flush)(void*, unsigned long),
unsigned char *outbuf,
long *posp,
void(*error)(char *x));
/* inbuf - input buffer
*len - len of pre-read data in inbuf
*fill - function to fill inbuf when empty
*flush - function to write out outbuf
*outbuf - output buffer
*posp - if non-null, input position (number of bytes read) will be
* returned here
*
*If len != 0, inbuf should contain all the necessary input data, and fill
*should be NULL
*If len = 0, inbuf can be NULL, in which case the decompressor will allocate
*the input buffer. If inbuf != NULL it must be at least XXX_IOBUF_SIZE bytes.
*fill will be called (repeatedly...) to read data, at most XXX_IOBUF_SIZE
*bytes should be read per call. Replace XXX with the appropriate decompressor
*name, i.e. LZMA_IOBUF_SIZE.
*
*If flush = NULL, outbuf must be large enough to buffer all the expected
*output. If flush != NULL, the output buffer will be allocated by the
*decompressor (outbuf = NULL), and the flush function will be called to
*flush the output buffer at the appropriate time (decompressor and stream
*dependent).
*/
/* Utility routine to detect the decompression method */
decompress_fn decompress_method(const unsigned char *inbuf, long len,
const char **name);
#endif
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