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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