kopia lustrzana https://github.com/micropython/micropython
103 wiersze
2.8 KiB
C
103 wiersze
2.8 KiB
C
/*
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* uzlib - tiny deflate/inflate library (deflate, gzip, zlib)
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*
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* Copyright (c) 2003 by Joergen Ibsen / Jibz
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* All Rights Reserved
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* http://www.ibsensoftware.com/
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*
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* Copyright (c) 2014 by Paul Sokolovsky
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*/
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#ifndef TINF_H_INCLUDED
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#define TINF_H_INCLUDED
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#include <stdint.h>
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/* calling convention */
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#ifndef TINFCC
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#ifdef __WATCOMC__
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#define TINFCC __cdecl
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#else
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#define TINFCC
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#endif
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define TINF_OK 0
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#define TINF_DATA_ERROR (-3)
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#define TINF_DEST_OVERFLOW (-4)
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/* data structures */
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typedef struct {
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unsigned short table[16]; /* table of code length counts */
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unsigned short trans[288]; /* code -> symbol translation table */
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} TINF_TREE;
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struct TINF_DATA;
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typedef struct TINF_DATA {
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const unsigned char *source;
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unsigned int tag;
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unsigned int bitcount;
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/* Buffer start */
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unsigned char *destStart;
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/* Buffer total size */
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unsigned int destSize;
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/* Current pointer in buffer */
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unsigned char *dest;
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/* Remaining bytes in buffer */
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unsigned int destRemaining;
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/* Argument is the allocation size which didn't fit into buffer. Note that
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exact mimumum size to grow buffer by is lastAlloc - destRemaining. But
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growing by this exact size is ineficient, as the next allocation will
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fail again. */
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int (*destGrow)(struct TINF_DATA *data, unsigned int lastAlloc);
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TINF_TREE ltree; /* dynamic length/symbol tree */
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TINF_TREE dtree; /* dynamic distance tree */
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} TINF_DATA;
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/* low-level API */
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/* Step 1: Allocate TINF_DATA structure */
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/* Step 2: Set destStart, destSize, and destGrow fields */
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/* Step 3: Set source field */
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/* Step 4: Call tinf_uncompress_dyn() */
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/* Step 5: In response to destGrow callback, update destStart and destSize fields */
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/* Step 6: When tinf_uncompress_dyn() returns, buf.dest points to a byte past last uncompressed byte */
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int TINFCC tinf_uncompress_dyn(TINF_DATA *d);
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int TINFCC tinf_zlib_uncompress_dyn(TINF_DATA *d, unsigned int sourceLen);
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/* high-level API */
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void TINFCC tinf_init(void);
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int TINFCC tinf_uncompress(void *dest, unsigned int *destLen,
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const void *source, unsigned int sourceLen);
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int TINFCC tinf_gzip_uncompress(void *dest, unsigned int *destLen,
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const void *source, unsigned int sourceLen);
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int TINFCC tinf_zlib_uncompress(void *dest, unsigned int *destLen,
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const void *source, unsigned int sourceLen);
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unsigned int TINFCC tinf_adler32(const void *data, unsigned int length);
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unsigned int TINFCC tinf_crc32(const void *data, unsigned int length);
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/* compression API */
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void TINFCC tinf_compress(void *data, const uint8_t *src, unsigned slen);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* TINF_H_INCLUDED */
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