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