| /* zlib.h -- interface of the 'zlib' general purpose compression library |
| version 1.1.3, July 9th, 1998 |
| |
| Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| |
| Jean-loup Gailly Mark Adler |
| jloup@gzip.org madler@alumni.caltech.edu |
| |
| |
| */ |
| |
| #ifndef _NSIS_ZLIB_H |
| #define _NSIS_ZLIB_H |
| |
| #include "nsis_zconf.h" |
| #include "nsis_zutil.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| |
| typedef struct inflate_huft_s FAR inflate_huft; |
| |
| |
| |
| typedef enum { /* waiting for "i:"=input, "o:"=output, "x:"=nothing */ |
| CODES_START, /* x: set up for LEN */ |
| CODES_LEN, /* i: get length/literal/eob next */ |
| CODES_LENEXT, /* i: getting length extra (have base) */ |
| CODES_DIST, /* i: get distance next */ |
| CODES_DISTEXT, /* i: getting distance extra */ |
| CODES_COPY, /* o: copying bytes in window, waiting for space */ |
| CODES_LIT, /* o: got literal, waiting for output space */ |
| CODES_WASH, /* o: got eob, possibly still output waiting */ |
| /* CODES_END, x: got eob and all data flushed */ |
| /* CODES_BADCODE, x: got error */ |
| |
| TYPE, /* get type bits (3, including end bit) */ |
| LENS, /* get lengths for stored */ |
| STORED, /* processing stored block */ |
| TABLE, /* get table lengths */ |
| BTREE, /* get bit lengths tree for a dynamic block */ |
| DTREE, /* get length, distance trees for a dynamic block */ |
| CODES, /* processing fixed or dynamic block */ |
| DRY, /* output remaining window bytes */ |
| DONE, /* finished last block, done */ |
| NZ_BAD /* got a data error--stuck here */ |
| } inflate_mode; |
| |
| /* inflate codes private state */ |
| struct inflate_codes_state { |
| |
| /* mode */ |
| /* inflate_mode mode; current inflate_codes mode */ |
| |
| /* mode dependent information */ |
| uInt len; |
| union { |
| struct { |
| inflate_huft *tree; /* pointer into tree */ |
| uInt need; /* bits needed */ |
| } code; /* if LEN or DIST, where in tree */ |
| uInt lit; /* if LIT, literal */ |
| struct { |
| uInt get; /* bits to get for extra */ |
| uInt dist; /* distance back to copy from */ |
| } copy; /* if EXT or COPY, where and how much */ |
| } sub; /* submode */ |
| |
| /* mode independent information */ |
| Byte lbits; /* ltree bits decoded per branch */ |
| Byte dbits; /* dtree bits decoder per branch */ |
| inflate_huft *ltree; /* literal/length/eob tree */ |
| inflate_huft *dtree; /* distance tree */ |
| |
| }; |
| |
| struct inflate_huft_s { |
| union { |
| struct { |
| Byte Exop; /* number of extra bits or operation */ |
| Byte Bits; /* number of bits in this code or subcode */ |
| } what; |
| } word; |
| unsigned short base; /* literal, length base, distance base, |
| or table offset */ |
| }; |
| |
| #define MANY 1440 |
| |
| typedef struct inflate_codes_state inflate_codes_statef; |
| |
| struct inflate_blocks_state { |
| |
| /* mode */ |
| inflate_mode mode; /* current inflate_block mode */ |
| |
| /* mode dependent information */ |
| union { |
| uInt left; /* if STORED, bytes left to copy */ |
| struct { |
| uInt table; /* table lengths (14 bits) */ |
| uInt index; /* index into blens (or border) */ |
| uIntf t_blens[258+31+31]; /* bit lengths of codes */ |
| uInt bb; /* bit length tree depth */ |
| inflate_huft *tb; /* bit length decoding tree */ |
| } trees; /* if DTREE, decoding info for trees */ |
| struct { |
| inflate_codes_statef t_codes; |
| } decode; /* if CODES, current state */ |
| } sub; /* submode */ |
| |
| uInt last; /* DRY if this block is the last block, TYPE otherwise */ |
| |
| /* mode independent information */ |
| uInt bitk; /* bits in bit buffer */ |
| uLong bitb; /* bit buffer */ |
| inflate_huft hufts[MANY]; /* single malloc for tree space */ |
| Bytef window[1 << MAX_WBITS]; /* sliding window */ |
| Bytef *end; /* one byte after sliding window */ |
| Bytef *read; /* window read pointer */ |
| Bytef *write; /* window write pointer */ |
| uLong check; /* check on output */ |
| |
| }; |
| |
| typedef struct nsis_z_stream_s { |
| Bytef *next_in; /* next input byte */ |
| uInt avail_in; /* number of bytes available at next_in */ |
| uLong total_in; /* total nb of input bytes read so far */ |
| |
| Bytef *next_out; /* next output byte should be put there */ |
| uInt avail_out; /* remaining free space at next_out */ |
| |
| /* char *msg; last error message, NULL if no error */ |
| /* struct internal_state FAR *state; not visible by applications */ |
| struct inflate_blocks_state blocks; |
| |
| } nsis_z_stream; |
| |
| typedef nsis_z_stream FAR *nsis_z_streamp; |
| |
| |
| #define Z_NO_FLUSH 0 |
| #define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */ |
| #define Z_SYNC_FLUSH 2 |
| #define Z_FULL_FLUSH 3 |
| #define Z_FINISH 4 |
| /* Allowed flush values; see deflate() below for details */ |
| |
| #define Z_OK 0 |
| #define Z_STREAM_END 1 |
| #define Z_NEED_DICT 2 |
| #define Z_ERRNO (-1) |
| |
| /* EXEHEAD doesn't need a specific return code, just < 0 */ |
| #define Z_STREAM_ERROR (-2) |
| #define Z_DATA_ERROR (-3) |
| #define Z_MEM_ERROR (-4) |
| #define Z_BUF_ERROR (-5) |
| #define Z_VERSION_ERROR (-6) |
| |
| /* Return codes for the compression/decompression functions. Negative |
| * values are errors, positive values are used for special but normal events. |
| */ |
| |
| #define Z_NO_COMPRESSION 0 |
| #define Z_BEST_SPEED 1 |
| #define Z_BEST_COMPRESSION 9 |
| #define Z_DEFAULT_COMPRESSION (-1) |
| /* compression levels */ |
| |
| #define Z_FILTERED 1 |
| #define Z_HUFFMAN_ONLY 2 |
| #define Z_DEFAULT_STRATEGY 0 |
| /* compression strategy; see deflateInit2() below for details */ |
| |
| #define Z_BINARY 0 |
| #define Z_ASCII 1 |
| #define Z_UNKNOWN 2 |
| /* Possible values of the data_type field */ |
| |
| #define Z_DEFLATED 8 |
| /* The deflate compression method (the only one supported in this version) */ |
| |
| #define Z_NULL 0 /* for initializing zalloc, zfree, opaque */ |
| |
| |
| #define nsis_inflateInit(x) inflateReset(x) |
| int ZEXPORT nsis_inflate(nsis_z_streamp z); |
| #define inflateReset(z) \ |
| { \ |
| (z)->blocks.mode = TYPE; \ |
| (z)->blocks.bitk = (z)->blocks.bitb = 0; \ |
| (z)->blocks.read = (z)->blocks.write = (z)->blocks.window; \ |
| (z)->blocks.end = (z)->blocks.window + (1 << DEF_WBITS); \ |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _ZLIB_H */ |
