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Update zlib-ng to 2.2.1 #26113 Release: https://github.com/zlib-ng/zlib-ng/releases/tag/2.2.1 ARM diagnostics patch: https://github.com/zlib-ng/zlib-ng/pull/1774 ### Pull Request Readiness Checklist See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [x] I agree to contribute to the project under Apache 2 License. - [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV - [x] The PR is proposed to the proper branch - [ ] There is a reference to the original bug report and related work - [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name. - [ ] The feature is well documented and sample code can be built with the project CMake
158 lines
7.4 KiB
C
158 lines
7.4 KiB
C
/* inflate.h -- internal inflate state definition
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* Copyright (C) 1995-2019 Mark Adler
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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/* WARNING: this file should *not* be used by applications. It is
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part of the implementation of the compression library and is
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subject to change. Applications should only use zlib.h.
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*/
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#ifndef INFLATE_H_
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#define INFLATE_H_
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#include "crc32.h"
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#ifdef S390_DFLTCC_INFLATE
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# include "arch/s390/dfltcc_common.h"
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# define HAVE_ARCH_INFLATE_STATE
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#endif
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/* define NO_GZIP when compiling if you want to disable gzip header and trailer decoding by inflate().
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NO_GZIP would be used to avoid linking in the crc code when it is not needed.
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For shared libraries, gzip decoding should be left enabled. */
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#ifndef NO_GZIP
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# define GUNZIP
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#endif
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/* Possible inflate modes between inflate() calls */
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typedef enum {
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HEAD = 16180, /* i: waiting for magic header */
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FLAGS, /* i: waiting for method and flags (gzip) */
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TIME, /* i: waiting for modification time (gzip) */
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OS, /* i: waiting for extra flags and operating system (gzip) */
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EXLEN, /* i: waiting for extra length (gzip) */
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EXTRA, /* i: waiting for extra bytes (gzip) */
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NAME, /* i: waiting for end of file name (gzip) */
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COMMENT, /* i: waiting for end of comment (gzip) */
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HCRC, /* i: waiting for header crc (gzip) */
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DICTID, /* i: waiting for dictionary check value */
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DICT, /* waiting for inflateSetDictionary() call */
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TYPE, /* i: waiting for type bits, including last-flag bit */
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TYPEDO, /* i: same, but skip check to exit inflate on new block */
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STORED, /* i: waiting for stored size (length and complement) */
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COPY_, /* i/o: same as COPY below, but only first time in */
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COPY, /* i/o: waiting for input or output to copy stored block */
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TABLE, /* i: waiting for dynamic block table lengths */
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LENLENS, /* i: waiting for code length code lengths */
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CODELENS, /* i: waiting for length/lit and distance code lengths */
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LEN_, /* i: same as LEN below, but only first time in */
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LEN, /* i: waiting for length/lit/eob code */
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LENEXT, /* i: waiting for length extra bits */
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DIST, /* i: waiting for distance code */
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DISTEXT, /* i: waiting for distance extra bits */
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MATCH, /* o: waiting for output space to copy string */
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LIT, /* o: waiting for output space to write literal */
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CHECK, /* i: waiting for 32-bit check value */
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LENGTH, /* i: waiting for 32-bit length (gzip) */
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DONE, /* finished check, done -- remain here until reset */
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BAD, /* got a data error -- remain here until reset */
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SYNC /* looking for synchronization bytes to restart inflate() */
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} inflate_mode;
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/*
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State transitions between above modes -
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(most modes can go to BAD on error -- not shown for clarity)
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Process header:
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HEAD -> (gzip) or (zlib) or (raw)
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(gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME -> COMMENT ->
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HCRC -> TYPE
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(zlib) -> DICTID or TYPE
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DICTID -> DICT -> TYPE
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(raw) -> TYPEDO
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Read deflate blocks:
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TYPE -> TYPEDO -> STORED or TABLE or LEN_ or CHECK
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STORED -> COPY_ -> COPY -> TYPE
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TABLE -> LENLENS -> CODELENS -> LEN_
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LEN_ -> LEN
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Read deflate codes in fixed or dynamic block:
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LEN -> LENEXT or LIT or TYPE
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LENEXT -> DIST -> DISTEXT -> MATCH -> LEN
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LIT -> LEN
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Process trailer:
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CHECK -> LENGTH -> DONE
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*/
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typedef struct inflate_state inflate_state;
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/* Struct for memory allocation handling */
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typedef struct inflate_allocs_s {
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char *buf_start;
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free_func zfree;
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inflate_state *state;
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unsigned char *window;
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} inflate_allocs;
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/* State maintained between inflate() calls -- approximately 7K bytes, not
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including the allocated sliding window, which is up to 32K bytes. */
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struct ALIGNED_(64) inflate_state {
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PREFIX3(stream) *strm; /* pointer back to this zlib stream */
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inflate_mode mode; /* current inflate mode */
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int last; /* true if processing last block */
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int wrap; /* bit 0 true for zlib, bit 1 true for gzip,
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bit 2 true to validate check value */
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int havedict; /* true if dictionary provided */
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int flags; /* gzip header method and flags, 0 if zlib, or
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-1 if raw or no header yet */
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unsigned dmax; /* zlib header max distance (INFLATE_STRICT) */
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unsigned long check; /* protected copy of check value */
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unsigned long total; /* protected copy of output count */
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PREFIX(gz_headerp) head; /* where to save gzip header information */
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/* sliding window */
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unsigned wbits; /* log base 2 of requested window size */
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uint32_t wsize; /* window size or zero if not using window */
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uint32_t whave; /* valid bytes in the window */
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uint32_t wnext; /* window write index */
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unsigned char *window; /* allocated sliding window, if needed */
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struct crc32_fold_s ALIGNED_(16) crc_fold;
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/* bit accumulator */
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uint32_t hold; /* input bit accumulator */
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unsigned bits; /* number of bits in "in" */
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/* for string and stored block copying */
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uint32_t length; /* literal or length of data to copy */
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unsigned offset; /* distance back to copy string from */
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/* for table and code decoding */
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unsigned extra; /* extra bits needed */
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/* fixed and dynamic code tables */
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code const *lencode; /* starting table for length/literal codes */
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code const *distcode; /* starting table for distance codes */
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unsigned lenbits; /* index bits for lencode */
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unsigned distbits; /* index bits for distcode */
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/* dynamic table building */
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unsigned ncode; /* number of code length code lengths */
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unsigned nlen; /* number of length code lengths */
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unsigned ndist; /* number of distance code lengths */
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uint32_t have; /* number of code lengths in lens[] */
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code *next; /* next available space in codes[] */
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uint16_t lens[320]; /* temporary storage for code lengths */
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uint16_t work[288]; /* work area for code table building */
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code codes[ENOUGH]; /* space for code tables */
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int sane; /* if false, allow invalid distance too far */
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int back; /* bits back of last unprocessed length/lit */
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unsigned was; /* initial length of match */
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uint32_t chunksize; /* size of memory copying chunk */
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inflate_allocs *alloc_bufs; /* struct for handling memory allocations */
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#ifdef HAVE_ARCH_INFLATE_STATE
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arch_inflate_state arch; /* architecture-specific extensions */
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#endif
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};
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void Z_INTERNAL PREFIX(fixedtables)(struct inflate_state *state);
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Z_INTERNAL inflate_allocs* alloc_inflate(PREFIX3(stream) *strm);
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Z_INTERNAL void free_inflate(PREFIX3(stream) *strm);
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#endif /* INFLATE_H_ */
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