forked from Mirrors/wine-wine
131 lines
5.5 KiB
C
131 lines
5.5 KiB
C
/*
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* MSZIP decompression header (taken from cabinet.h of cabinet dll)
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*
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* Copyright 2002 Greg Turner
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* Copyright 2005 Gerold Jens Wucherpfennig
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* Copyright 2010 Christian Costa
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "fdi.h"
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typedef unsigned char cab_UBYTE; /* 8 bits */
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typedef UINT16 cab_UWORD; /* 16 bits */
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typedef UINT32 cab_ULONG; /* 32 bits */
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typedef INT32 cab_LONG; /* 32 bits */
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typedef struct {
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unsigned int FDI_Intmagic;
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PFNALLOC pfnalloc;
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PFNFREE pfnfree;
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PFNOPEN pfnopen;
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PFNREAD pfnread;
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PFNWRITE pfnwrite;
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PFNCLOSE pfnclose;
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PFNSEEK pfnseek;
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PERF perf;
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} FDI_Int, *PFDI_Int;
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/* cast an HFDI into a PFDI_Int */
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#define PFDI_INT(hfdi) ((PFDI_Int)(hfdi))
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#define PFDI_ALLOC(hfdi, size) ((*PFDI_INT(hfdi)->pfnalloc) (size))
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#define PFDI_FREE(hfdi, ptr) ((*PFDI_INT(hfdi)->pfnfree) (ptr))
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/* MSZIP stuff */
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#define ZIPWSIZE 0x8000 /* window size */
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#define ZIPLBITS 9 /* bits in base literal/length lookup table */
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#define ZIPDBITS 6 /* bits in base distance lookup table */
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#define ZIPBMAX 16 /* maximum bit length of any code */
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#define ZIPN_MAX 288 /* maximum number of codes in any set */
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struct Ziphuft {
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cab_UBYTE e; /* number of extra bits or operation */
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cab_UBYTE b; /* number of bits in this code or subcode */
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union {
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cab_UWORD n; /* literal, length base, or distance base */
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struct Ziphuft *t; /* pointer to next level of table */
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} v;
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};
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struct ZIPstate {
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cab_ULONG window_posn; /* current offset within the window */
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cab_ULONG bb; /* bit buffer */
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cab_ULONG bk; /* bits in bit buffer */
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cab_ULONG ll[288+32]; /* literal/length and distance code lengths */
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cab_ULONG c[ZIPBMAX+1]; /* bit length count table */
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cab_LONG lx[ZIPBMAX+1]; /* memory for l[-1..ZIPBMAX-1] */
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struct Ziphuft *u[ZIPBMAX]; /* table stack */
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cab_ULONG v[ZIPN_MAX]; /* values in order of bit length */
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cab_ULONG x[ZIPBMAX+1]; /* bit offsets, then code stack */
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cab_UBYTE *inpos;
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};
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#define CAB(x) (decomp_state->x)
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#define ZIP(x) (decomp_state->methods.zip.x)
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#define DECR_OK (0)
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#define DECR_DATAFORMAT (1)
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#define DECR_ILLEGALDATA (2)
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#define DECR_NOMEMORY (3)
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#define DECR_CHECKSUM (4)
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#define DECR_INPUT (5)
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#define DECR_OUTPUT (6)
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#define DECR_USERABORT (7)
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#define ZIPNEEDBITS(n) {while(k<(n)){cab_LONG c=*(ZIP(inpos)++);\
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b|=((cab_ULONG)c)<<k;k+=8;}}
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#define ZIPDUMPBITS(n) {b>>=(n);k-=(n);}
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/* CAB data blocks are <= 32768 bytes in uncompressed form. Uncompressed
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* blocks have zero growth. MSZIP guarantees that it won't grow above
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* uncompressed size by more than 12 bytes. LZX guarantees it won't grow
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* more than 6144 bytes.
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*/
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#define CAB_BLOCKMAX (32768)
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#define CAB_INPUTMAX (CAB_BLOCKMAX+6144)
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typedef struct fdi_cds_fwd {
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void *hfdi; /* the hfdi we are using */
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cab_UBYTE inbuf[CAB_INPUTMAX+2]; /* +2 for lzx bitbuffer overflows! */
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cab_UBYTE outbuf[CAB_BLOCKMAX];
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union {
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struct ZIPstate zip;
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} methods;
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} fdi_decomp_state;
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/* Tables for deflate from PKZIP's appnote.txt. */
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#define THOSE_ZIP_CONSTS \
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static const cab_UBYTE Zipborder[] = /* Order of the bit length code lengths */ \
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{ 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15}; \
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static const cab_UWORD Zipcplens[] = /* Copy lengths for literal codes 257..285 */ \
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{ 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, 35, 43, 51, \
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59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0}; \
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static const cab_UWORD Zipcplext[] = /* Extra bits for literal codes 257..285 */ \
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{ 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, \
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4, 5, 5, 5, 5, 0, 99, 99}; /* 99==invalid */ \
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static const cab_UWORD Zipcpdist[] = /* Copy offsets for distance codes 0..29 */ \
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{ 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, \
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513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577}; \
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static const cab_UWORD Zipcpdext[] = /* Extra bits for distance codes */ \
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{ 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, \
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10, 11, 11, 12, 12, 13, 13}; \
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/* And'ing with Zipmask[n] masks the lower n bits */ \
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static const cab_UWORD Zipmask[17] = { \
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0x0000, 0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff, \
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0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff \
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}
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