reactos/lib/cabinet/cabinet.h

   1 /*
   2  * cabinet.h
   3  *
   4  * Copyright 2002 Greg Turner
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20 #ifndef __WINE_CABINET_H
  21 #define __WINE_CABINET_H
  22
  23 #include <stdarg.h>
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "winnt.h"
  28 #include "fdi.h"
  29 #include "fci.h"
  30
  31 /* from msvcrt/sys/stat.h */
  32 #define _S_IWRITE 0x0080
  33 #define _S_IREAD  0x0100
  34
  35 #define CAB_SPLITMAX (10)
  36
  37 #define CAB_SEARCH_SIZE (32*1024)
  38
  39 typedef unsigned char cab_UBYTE; /* 8 bits  */
  40 typedef UINT16        cab_UWORD; /* 16 bits */
  41 typedef UINT32        cab_ULONG; /* 32 bits */
  42 typedef INT32         cab_LONG;  /* 32 bits */
  43
  44 typedef UINT32        cab_off_t;
  45
  46 /* number of bits in a ULONG */
  47 #ifndef CHAR_BIT
  48 # define CHAR_BIT (8)
  49 #endif
  50 #define CAB_ULONG_BITS (sizeof(cab_ULONG) * CHAR_BIT)
  51
  52 /* structure offsets */
  53 #define cfhead_Signature         (0x00)
  54 #define cfhead_CabinetSize       (0x08)
  55 #define cfhead_FileOffset        (0x10)
  56 #define cfhead_MinorVersion      (0x18)
  57 #define cfhead_MajorVersion      (0x19)
  58 #define cfhead_NumFolders        (0x1A)
  59 #define cfhead_NumFiles          (0x1C)
  60 #define cfhead_Flags             (0x1E)
  61 #define cfhead_SetID             (0x20)
  62 #define cfhead_CabinetIndex      (0x22)
  63 #define cfhead_SIZEOF            (0x24)
  64 #define cfheadext_HeaderReserved (0x00)
  65 #define cfheadext_FolderReserved (0x02)
  66 #define cfheadext_DataReserved   (0x03)
  67 #define cfheadext_SIZEOF         (0x04)
  68 #define cffold_DataOffset        (0x00)
  69 #define cffold_NumBlocks         (0x04)
  70 #define cffold_CompType          (0x06)
  71 #define cffold_SIZEOF            (0x08)
  72 #define cffile_UncompressedSize  (0x00)
  73 #define cffile_FolderOffset      (0x04)
  74 #define cffile_FolderIndex       (0x08)
  75 #define cffile_Date              (0x0A)
  76 #define cffile_Time              (0x0C)
  77 #define cffile_Attribs           (0x0E)
  78 #define cffile_SIZEOF            (0x10)
  79 #define cfdata_CheckSum          (0x00)
  80 #define cfdata_CompressedSize    (0x04)
  81 #define cfdata_UncompressedSize  (0x06)
  82 #define cfdata_SIZEOF            (0x08)
  83
  84 /* flags */
  85 #define cffoldCOMPTYPE_MASK            (0x000f)
  86 #define cffoldCOMPTYPE_NONE            (0x0000)
  87 #define cffoldCOMPTYPE_MSZIP           (0x0001)
  88 #define cffoldCOMPTYPE_QUANTUM         (0x0002)
  89 #define cffoldCOMPTYPE_LZX             (0x0003)
  90 #define cfheadPREV_CABINET             (0x0001)
  91 #define cfheadNEXT_CABINET             (0x0002)
  92 #define cfheadRESERVE_PRESENT          (0x0004)
  93 #define cffileCONTINUED_FROM_PREV      (0xFFFD)
  94 #define cffileCONTINUED_TO_NEXT        (0xFFFE)
  95 #define cffileCONTINUED_PREV_AND_NEXT  (0xFFFF)
  96 #define cffile_A_RDONLY                (0x01)
  97 #define cffile_A_HIDDEN                (0x02)
  98 #define cffile_A_SYSTEM                (0x04)
  99 #define cffile_A_ARCH                  (0x20)
 100 #define cffile_A_EXEC                  (0x40)
 101 #define cffile_A_NAME_IS_UTF           (0x80)
 102
 103 /****************************************************************************/
 104 /* our archiver information / state */
 105
 106 /* MSZIP stuff */
 107 #define ZIPWSIZE        0x8000  /* window size */
 108 #define ZIPLBITS        9       /* bits in base literal/length lookup table */
 109 #define ZIPDBITS        6       /* bits in base distance lookup table */
 110 #define ZIPBMAX         16      /* maximum bit length of any code */
 111 #define ZIPN_MAX        288     /* maximum number of codes in any set */
 112
 113 struct Ziphuft {
 114   cab_UBYTE e;                /* number of extra bits or operation */
 115   cab_UBYTE b;                /* number of bits in this code or subcode */
 116   union {
 117     cab_UWORD n;              /* literal, length base, or distance base */
 118     struct Ziphuft *t;        /* pointer to next level of table */
 119   } v;
 120 };
 121
 122 struct ZIPstate {
 123     cab_ULONG window_posn;      /* current offset within the window        */
 124     cab_ULONG bb;               /* bit buffer */
 125     cab_ULONG bk;               /* bits in bit buffer */
 126     cab_ULONG ll[288+32];       /* literal/length and distance code lengths */
 127     cab_ULONG c[ZIPBMAX+1];     /* bit length count table */
 128     cab_LONG  lx[ZIPBMAX+1];    /* memory for l[-1..ZIPBMAX-1] */
 129     struct Ziphuft *u[ZIPBMAX]; /* table stack */
 130     cab_ULONG v[ZIPN_MAX];      /* values in order of bit length */
 131     cab_ULONG x[ZIPBMAX+1];     /* bit offsets, then code stack */
 132     cab_UBYTE *inpos;
 133 };
 134
 135 /* Quantum stuff */
 136
 137 struct QTMmodelsym {
 138   cab_UWORD sym, cumfreq;
 139 };
 140
 141 struct QTMmodel {
 142   int shiftsleft, entries;
 143   struct QTMmodelsym *syms;
 144   cab_UWORD tabloc[256];
 145 };
 146
 147 struct QTMstate {
 148     cab_UBYTE *window;         /* the actual decoding window              */
 149     cab_ULONG window_size;     /* window size (1Kb through 2Mb)           */
 150     cab_ULONG actual_size;     /* window size when it was first allocated */
 151     cab_ULONG window_posn;     /* current offset within the window        */
 152
 153     struct QTMmodel model7;
 154     struct QTMmodelsym m7sym[7+1];
 155
 156     struct QTMmodel model4, model5, model6pos, model6len;
 157     struct QTMmodelsym m4sym[0x18 + 1];
 158     struct QTMmodelsym m5sym[0x24 + 1];
 159     struct QTMmodelsym m6psym[0x2a + 1], m6lsym[0x1b + 1];
 160
 161     struct QTMmodel model00, model40, model80, modelC0;
 162     struct QTMmodelsym m00sym[0x40 + 1], m40sym[0x40 + 1];
 163     struct QTMmodelsym m80sym[0x40 + 1], mC0sym[0x40 + 1];
 164 };
 165
 166 /* LZX stuff */
 167
 168 /* some constants defined by the LZX specification */
 169 #define LZX_MIN_MATCH                (2)
 170 #define LZX_MAX_MATCH                (257)
 171 #define LZX_NUM_CHARS                (256)
 172 #define LZX_BLOCKTYPE_INVALID        (0)   /* also blocktypes 4-7 invalid */
 173 #define LZX_BLOCKTYPE_VERBATIM       (1)
 174 #define LZX_BLOCKTYPE_ALIGNED        (2)
 175 #define LZX_BLOCKTYPE_UNCOMPRESSED   (3)
 176 #define LZX_PRETREE_NUM_ELEMENTS     (20)
 177 #define LZX_ALIGNED_NUM_ELEMENTS     (8)   /* aligned offset tree #elements */
 178 #define LZX_NUM_PRIMARY_LENGTHS      (7)   /* this one missing from spec! */
 179 #define LZX_NUM_SECONDARY_LENGTHS    (249) /* length tree #elements */
 180
 181 /* LZX huffman defines: tweak tablebits as desired */
 182 #define LZX_PRETREE_MAXSYMBOLS  (LZX_PRETREE_NUM_ELEMENTS)
 183 #define LZX_PRETREE_TABLEBITS   (6)
 184 #define LZX_MAINTREE_MAXSYMBOLS (LZX_NUM_CHARS + 50*8)
 185 #define LZX_MAINTREE_TABLEBITS  (12)
 186 #define LZX_LENGTH_MAXSYMBOLS   (LZX_NUM_SECONDARY_LENGTHS+1)
 187 #define LZX_LENGTH_TABLEBITS    (12)
 188 #define LZX_ALIGNED_MAXSYMBOLS  (LZX_ALIGNED_NUM_ELEMENTS)
 189 #define LZX_ALIGNED_TABLEBITS   (7)
 190
 191 #define LZX_LENTABLE_SAFETY (64) /* we allow length table decoding overruns */
 192
 193 #define LZX_DECLARE_TABLE(tbl) \
 194   cab_UWORD tbl##_table[(1<<LZX_##tbl##_TABLEBITS) + (LZX_##tbl##_MAXSYMBOLS<<1)];\
 195   cab_UBYTE tbl##_len  [LZX_##tbl##_MAXSYMBOLS + LZX_LENTABLE_SAFETY]
 196
 197 struct LZXstate {
 198     cab_UBYTE *window;         /* the actual decoding window              */
 199     cab_ULONG window_size;     /* window size (32Kb through 2Mb)          */
 200     cab_ULONG actual_size;     /* window size when it was first allocated */
 201     cab_ULONG window_posn;     /* current offset within the window        */
 202     cab_ULONG R0, R1, R2;      /* for the LRU offset system               */
 203     cab_UWORD main_elements;   /* number of main tree elements            */
 204     int   header_read;         /* have we started decoding at all yet?    */
 205     cab_UWORD block_type;      /* type of this block                      */
 206     cab_ULONG block_length;    /* uncompressed length of this block       */
 207     cab_ULONG block_remaining; /* uncompressed bytes still left to decode */
 208     cab_ULONG frames_read;     /* the number of CFDATA blocks processed   */
 209     cab_LONG  intel_filesize;  /* magic header value used for transform   */
 210     cab_LONG  intel_curpos;    /* current offset in transform space       */
 211     int   intel_started;       /* have we seen any translatable data yet? */
 212
 213     LZX_DECLARE_TABLE(PRETREE);
 214     LZX_DECLARE_TABLE(MAINTREE);
 215     LZX_DECLARE_TABLE(LENGTH);
 216     LZX_DECLARE_TABLE(ALIGNED);
 217 };
 218
 219 struct lzx_bits {
 220   cab_ULONG bb;
 221   int bl;
 222   cab_UBYTE *ip;
 223 };
 224
 225 /* CAB data blocks are <= 32768 bytes in uncompressed form. Uncompressed
 226  * blocks have zero growth. MSZIP guarantees that it won't grow above
 227  * uncompressed size by more than 12 bytes. LZX guarantees it won't grow
 228  * more than 6144 bytes.
 229  */
 230 #define CAB_BLOCKMAX (32768)
 231 #define CAB_INPUTMAX (CAB_BLOCKMAX+6144)
 232
 233 struct cab_file {
 234   struct cab_file *next;               /* next file in sequence          */
 235   struct cab_folder *folder;           /* folder that contains this file */
 236   LPCSTR filename;                     /* output name of file            */
 237   HANDLE fh;                           /* open file handle or NULL       */
 238   cab_ULONG length;                    /* uncompressed length of file    */
 239   cab_ULONG offset;                    /* uncompressed offset in folder  */
 240   cab_UWORD index;                     /* magic index number of folder   */
 241   cab_UWORD time, date, attribs;       /* MS-DOS time/date/attributes    */
 242 };
 243
 244
 245 struct cab_folder {
 246   struct cab_folder *next;
 247   struct cabinet *cab[CAB_SPLITMAX];   /* cabinet(s) this folder spans   */
 248   cab_off_t offset[CAB_SPLITMAX];      /* offset to data blocks          */
 249   cab_UWORD comp_type;                 /* compression format/window size */
 250   cab_ULONG comp_size;                 /* compressed size of folder      */
 251   cab_UBYTE num_splits;                /* number of split blocks + 1     */
 252   cab_UWORD num_blocks;                /* total number of blocks         */
 253   struct cab_file *contfile;           /* the first split file           */
 254 };
 255
 256 struct cabinet {
 257   struct cabinet *next;                /* for making a list of cabinets  */
 258   LPCSTR filename;                     /* input name of cabinet          */
 259   HANDLE *fh;                          /* open file handle or NULL       */
 260   cab_off_t filelen;                   /* length of cabinet file         */
 261   cab_off_t blocks_off;                /* offset to data blocks in file  */
 262   struct cabinet *prevcab, *nextcab;   /* multipart cabinet chains       */
 263   char *prevname, *nextname;           /* and their filenames            */
 264   char *previnfo, *nextinfo;           /* and their visible names        */
 265   struct cab_folder *folders;          /* first folder in this cabinet   */
 266   struct cab_file *files;              /* first file in this cabinet     */
 267   cab_UBYTE block_resv;                /* reserved space in datablocks   */
 268   cab_UBYTE flags;                     /* header flags                   */
 269 };
 270
 271 typedef struct cds_forward {
 272   struct cab_folder *current;      /* current folder we're extracting from  */
 273   cab_ULONG offset;                /* uncompressed offset within folder     */
 274   cab_UBYTE *outpos;               /* (high level) start of data to use up  */
 275   cab_UWORD outlen;                /* (high level) amount of data to use up */
 276   cab_UWORD split;                 /* at which split in current folder?     */
 277   int (*decompress)(int, int, struct cds_forward *); /* chosen compress fn  */
 278   cab_UBYTE inbuf[CAB_INPUTMAX+2]; /* +2 for lzx bitbuffer overflows!       */
 279   cab_UBYTE outbuf[CAB_BLOCKMAX];
 280   cab_UBYTE q_length_base[27], q_length_extra[27], q_extra_bits[42];
 281   cab_ULONG q_position_base[42];
 282   cab_ULONG lzx_position_base[51];
 283   cab_UBYTE extra_bits[51];
 284   union {
 285     struct ZIPstate zip;
 286     struct QTMstate qtm;
 287     struct LZXstate lzx;
 288   } methods;
 289 } cab_decomp_state;
 290
 291 /* _Int as in "Internal" fyi */
 292
 293 typedef struct {
 294   unsigned int     FCI_Intmagic;
 295 } FCI_Int, *PFCI_Int;
 296
 297 typedef struct {
 298   unsigned int FDI_Intmagic;
 299   PFNALLOC pfnalloc;
 300   PFNFREE  pfnfree;
 301   PFNOPEN  pfnopen;
 302   PFNREAD  pfnread;
 303   PFNWRITE pfnwrite;
 304   PFNCLOSE pfnclose;
 305   PFNSEEK  pfnseek;
 306   PERF     perf;
 307 } FDI_Int, *PFDI_Int;
 308
 309 /* cast an HFCI into a PFCI_Int */
 310 #define PFCI_INT(hfci) ((PFDI_Int)(hfci))
 311
 312 /* cast an HFDI into a PFDI_Int */
 313 #define PFDI_INT(hfdi) ((PFDI_Int)(hfdi))
 314
 315 /* quickie pfdi method invokers */
 316 #define PFDI_ALLOC(hfdi, size)            ((*PFDI_INT(hfdi)->pfnalloc) (size))
 317 #define PFDI_FREE(hfdi, ptr)              ((*PFDI_INT(hfdi)->pfnfree)  (ptr))
 318 #define PFDI_OPEN(hfdi, file, flag, mode) ((*PFDI_INT(hfdi)->pfnopen)  (file, flag, mode))
 319 #define PFDI_READ(hfdi, hf, pv, cb)       ((*PFDI_INT(hfdi)->pfnread)  (hf, pv, cb))
 320 #define PFDI_WRITE(hfdi, hf, pv, cb)      ((*PFDI_INT(hfdi)->pfnwrite) (hf, pv, cb))
 321 #define PFDI_CLOSE(hfdi, hf)              ((*PFDI_INT(hfdi)->pfnclose) (hf))
 322 #define PFDI_SEEK(hfdi, hf, dist, type)   ((*PFDI_INT(hfdi)->pfnseek)  (hf, dist, type))
 323
 324 #define FCI_INT_MAGIC 0xfcfcfc05
 325 #define FDI_INT_MAGIC 0xfdfdfd05
 326
 327 #define REALLY_IS_FCI(hfci) ( \
 328   (((void *) hfci) != NULL) && \
 329   (PFCI_INT(hfci)->FCI_Intmagic == FCI_INT_MAGIC) )
 330
 331 #define REALLY_IS_FDI(hfdi) ( \
 332   (((void *) hfdi) != NULL) && \
 333   (PFDI_INT(hfdi)->FDI_Intmagic == FDI_INT_MAGIC) )
 334
 335 /*
 336  * the rest of these are somewhat kludgy macros which are shared between fdi.c
 337  * and cabextract.c.
 338  */
 339
 340 #define ZIPNEEDBITS(n) {while(k<(n)){cab_LONG c=*(ZIP(inpos)++);\
 341     b|=((cab_ULONG)c)<<k;k+=8;}}
 342 #define ZIPDUMPBITS(n) {b>>=(n);k-=(n);}
 343
 344 /* endian-neutral reading of little-endian data */
 345 #define EndGetI32(a)  ((((a)[3])<<24)|(((a)[2])<<16)|(((a)[1])<<8)|((a)[0]))
 346 #define EndGetI16(a)  ((((a)[1])<<8)|((a)[0]))
 347
 348 #define CAB(x) (decomp_state->x)
 349 #define ZIP(x) (decomp_state->methods.zip.x)
 350 #define QTM(x) (decomp_state->methods.qtm.x)
 351 #define LZX(x) (decomp_state->methods.lzx.x)
 352 #define DECR_OK           (0)
 353 #define DECR_DATAFORMAT   (1)
 354 #define DECR_ILLEGALDATA  (2)
 355 #define DECR_NOMEMORY     (3)
 356 #define DECR_CHECKSUM     (4)
 357 #define DECR_INPUT        (5)
 358 #define DECR_OUTPUT       (6)
 359 #define DECR_USERABORT    (7)
 360
 361 /* Bitstream reading macros (Quantum / normal byte order)
 362  *
 363  * Q_INIT_BITSTREAM    should be used first to set up the system
 364  * Q_READ_BITS(var,n)  takes N bits from the buffer and puts them in var.
 365  *                     unlike LZX, this can loop several times to get the
 366  *                     requisite number of bits.
 367  * Q_FILL_BUFFER       adds more data to the bit buffer, if there is room
 368  *                     for another 16 bits.
 369  * Q_PEEK_BITS(n)      extracts (without removing) N bits from the bit
 370  *                     buffer
 371  * Q_REMOVE_BITS(n)    removes N bits from the bit buffer
 372  *
 373  * These bit access routines work by using the area beyond the MSB and the
 374  * LSB as a free source of zeroes. This avoids having to mask any bits.
 375  * So we have to know the bit width of the bitbuffer variable. This is
 376  * defined as ULONG_BITS.
 377  *
 378  * ULONG_BITS should be at least 16 bits. Unlike LZX's Huffman decoding,
 379  * Quantum's arithmetic decoding only needs 1 bit at a time, it doesn't
 380  * need an assured number. Retrieving larger bitstrings can be done with
 381  * multiple reads and fills of the bitbuffer. The code should work fine
 382  * for machines where ULONG >= 32 bits.
 383  *
 384  * Also note that Quantum reads bytes in normal order; LZX is in
 385  * little-endian order.
 386  */
 387
 388 #define Q_INIT_BITSTREAM do { bitsleft = 0; bitbuf = 0; } while (0)
 389
 390 #define Q_FILL_BUFFER do {                                                  \
 391   if (bitsleft <= (CAB_ULONG_BITS - 16)) {                                  \
 392     bitbuf |= ((inpos[0]<<8)|inpos[1]) << (CAB_ULONG_BITS-16 - bitsleft);   \
 393     bitsleft += 16; inpos += 2;                                             \
 394   }                                                                         \
 395 } while (0)
 396
 397 #define Q_PEEK_BITS(n)   (bitbuf >> (CAB_ULONG_BITS - (n)))
 398 #define Q_REMOVE_BITS(n) ((bitbuf <<= (n)), (bitsleft -= (n)))
 399
 400 #define Q_READ_BITS(v,n) do {                                           \
 401   (v) = 0;                                                              \
 402   for (bitsneed = (n); bitsneed; bitsneed -= bitrun) {                  \
 403     Q_FILL_BUFFER;                                                      \
 404     bitrun = (bitsneed > bitsleft) ? bitsleft : bitsneed;               \
 405     (v) = ((v) << bitrun) | Q_PEEK_BITS(bitrun);                        \
 406     Q_REMOVE_BITS(bitrun);                                              \
 407   }                                                                     \
 408 } while (0)
 409
 410 #define Q_MENTRIES(model) (QTM(model).entries)
 411 #define Q_MSYM(model,symidx) (QTM(model).syms[(symidx)].sym)
 412 #define Q_MSYMFREQ(model,symidx) (QTM(model).syms[(symidx)].cumfreq)
 413
 414 /* GET_SYMBOL(model, var) fetches the next symbol from the stated model
 415  * and puts it in var. it may need to read the bitstream to do this.
 416  */
 417 #define GET_SYMBOL(m, var) do {                                         \
 418   range =  ((H - L) & 0xFFFF) + 1;                                      \
 419   symf = ((((C - L + 1) * Q_MSYMFREQ(m,0)) - 1) / range) & 0xFFFF;      \
 420                                                                         \
 421   for (i=1; i < Q_MENTRIES(m); i++) {                                   \
 422     if (Q_MSYMFREQ(m,i) <= symf) break;                                 \
 423   }                                                                     \
 424   (var) = Q_MSYM(m,i-1);                                                \
 425                                                                         \
 426   range = (H - L) + 1;                                                  \
 427   H = L + ((Q_MSYMFREQ(m,i-1) * range) / Q_MSYMFREQ(m,0)) - 1;          \
 428   L = L + ((Q_MSYMFREQ(m,i)   * range) / Q_MSYMFREQ(m,0));              \
 429   while (1) {                                                           \
 430     if ((L & 0x8000) != (H & 0x8000)) {                                 \
 431       if ((L & 0x4000) && !(H & 0x4000)) {                              \
 432         /* underflow case */                                            \
 433         C ^= 0x4000; L &= 0x3FFF; H |= 0x4000;                          \
 434       }                                                                 \
 435       else break;                                                       \
 436     }                                                                   \
 437     L <<= 1; H = (H << 1) | 1;                                          \
 438     Q_FILL_BUFFER;                                                      \
 439     C  = (C << 1) | Q_PEEK_BITS(1);                                     \
 440     Q_REMOVE_BITS(1);                                                   \
 441   }                                                                     \
 442                                                                         \
 443   QTMupdatemodel(&(QTM(m)), i);                                         \
 444 } while (0)
 445
 446 /* Bitstream reading macros (LZX / intel little-endian byte order)
 447  *
 448  * INIT_BITSTREAM    should be used first to set up the system
 449  * READ_BITS(var,n)  takes N bits from the buffer and puts them in var
 450  *
 451  * ENSURE_BITS(n)    ensures there are at least N bits in the bit buffer.
 452  *                   it can guarantee up to 17 bits (i.e. it can read in
 453  *                   16 new bits when there is down to 1 bit in the buffer,
 454  *                   and it can read 32 bits when there are 0 bits in the
 455  *                   buffer).
 456  * PEEK_BITS(n)      extracts (without removing) N bits from the bit buffer
 457  * REMOVE_BITS(n)    removes N bits from the bit buffer
 458  *
 459  * These bit access routines work by using the area beyond the MSB and the
 460  * LSB as a free source of zeroes. This avoids having to mask any bits.
 461  * So we have to know the bit width of the bitbuffer variable.
 462  */
 463
 464 #define INIT_BITSTREAM do { bitsleft = 0; bitbuf = 0; } while (0)
 465
 466 /* Quantum reads bytes in normal order; LZX is little-endian order */
 467 #define ENSURE_BITS(n)                                                    \
 468   while (bitsleft < (n)) {                                                \
 469     bitbuf |= ((inpos[1]<<8)|inpos[0]) << (CAB_ULONG_BITS-16 - bitsleft); \
 470     bitsleft += 16; inpos+=2;                                             \
 471   }
 472
 473 #define PEEK_BITS(n)   (bitbuf >> (CAB_ULONG_BITS - (n)))
 474 #define REMOVE_BITS(n) ((bitbuf <<= (n)), (bitsleft -= (n)))
 475
 476 #define READ_BITS(v,n) do {                                             \
 477   if (n) {                                                              \
 478     ENSURE_BITS(n);                                                     \
 479     (v) = PEEK_BITS(n);                                                 \
 480     REMOVE_BITS(n);                                                     \
 481   }                                                                     \
 482   else {                                                                \
 483     (v) = 0;                                                            \
 484   }                                                                     \
 485 } while (0)
 486
 487 /* Huffman macros */
 488
 489 #define TABLEBITS(tbl)   (LZX_##tbl##_TABLEBITS)
 490 #define MAXSYMBOLS(tbl)  (LZX_##tbl##_MAXSYMBOLS)
 491 #define SYMTABLE(tbl)    (LZX(tbl##_table))
 492 #define LENTABLE(tbl)    (LZX(tbl##_len))
 493
 494 /* BUILD_TABLE(tablename) builds a huffman lookup table from code lengths.
 495  * In reality, it just calls make_decode_table() with the appropriate
 496  * values - they're all fixed by some #defines anyway, so there's no point
 497  * writing each call out in full by hand.
 498  */
 499 #define BUILD_TABLE(tbl)                                                \
 500   if (make_decode_table(                                                \
 501     MAXSYMBOLS(tbl), TABLEBITS(tbl), LENTABLE(tbl), SYMTABLE(tbl)       \
 502   )) { return DECR_ILLEGALDATA; }
 503
 504 /* READ_HUFFSYM(tablename, var) decodes one huffman symbol from the
 505  * bitstream using the stated table and puts it in var.
 506  */
 507 #define READ_HUFFSYM(tbl,var) do {                                      \
 508   ENSURE_BITS(16);                                                      \
 509   hufftbl = SYMTABLE(tbl);                                              \
 510   if ((i = hufftbl[PEEK_BITS(TABLEBITS(tbl))]) >= MAXSYMBOLS(tbl)) {    \
 511     j = 1 << (CAB_ULONG_BITS - TABLEBITS(tbl));                         \
 512     do {                                                                \
 513       j >>= 1; i <<= 1; i |= (bitbuf & j) ? 1 : 0;                      \
 514       if (!j) { return DECR_ILLEGALDATA; }                              \
 515     } while ((i = hufftbl[i]) >= MAXSYMBOLS(tbl));                      \
 516   }                                                                     \
 517   j = LENTABLE(tbl)[(var) = i];                                         \
 518   REMOVE_BITS(j);                                                       \
 519 } while (0)
 520
 521 /* READ_LENGTHS(tablename, first, last) reads in code lengths for symbols
 522  * first to last in the given table. The code lengths are stored in their
 523  * own special LZX way.
 524  */
 525 #define READ_LENGTHS(tbl,first,last,fn) do { \
 526   lb.bb = bitbuf; lb.bl = bitsleft; lb.ip = inpos; \
 527   if (fn(LENTABLE(tbl),(first),(last),&lb,decomp_state)) { \
 528     return DECR_ILLEGALDATA; \
 529   } \
 530   bitbuf = lb.bb; bitsleft = lb.bl; inpos = lb.ip; \
 531 } while (0)
 532
 533 /* Tables for deflate from PKZIP's appnote.txt. */
 534
 535 #define THOSE_ZIP_CONSTS                                                           \
 536 static const cab_UBYTE Zipborder[] = /* Order of the bit length code lengths */    \
 537 { 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};               \
 538 static const cab_UWORD Zipcplens[] = /* Copy lengths for literal codes 257..285 */ \
 539 { 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, 35, 43, 51,             \
 540  59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};                              \
 541 static const cab_UWORD Zipcplext[] = /* Extra bits for literal codes 257..285 */   \
 542 { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4,             \
 543   4, 5, 5, 5, 5, 0, 99, 99}; /* 99==invalid */                                     \
 544 static const cab_UWORD Zipcpdist[] = /* Copy offsets for distance codes 0..29 */   \
 545 { 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385,             \
 546 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577};          \
 547 static const cab_UWORD Zipcpdext[] = /* Extra bits for distance codes */           \
 548 { 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10,            \
 549 10, 11, 11, 12, 12, 13, 13};                                                       \
 550 /* And'ing with Zipmask[n] masks the lower n bits */                               \
 551 static const cab_UWORD Zipmask[17] = {                                             \
 552  0x0000, 0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,           \
 553  0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff                    \
 554 }
 555
 556 struct ExtractFileList {
 557         LPSTR  filename;
 558         struct ExtractFileList *next;
 559         BOOL   unknown;  /* always 1L */
 560 } ;
 561
 562 /* the first parameter of the function extract */
 563 typedef struct {
 564         long  result1;          /* 0x000 */
 565         long  unknown1[3];      /* 0x004 */
 566         struct ExtractFileList *filelist; /* 0x010 */
 567         long  filecount;        /* 0x014 */
 568         long  unknown2;         /* 0x018 */
 569         char  directory[0x104]; /* 0x01c */
 570         char  lastfile[0x20c];  /* 0x120 */
 571 } EXTRACTdest;
 572
 573
 574 /* from cabextract.c */
 575 BOOL process_cabinet(LPCSTR cabname, LPCSTR dir, BOOL fix, BOOL lower, EXTRACTdest *dest);
 576 void QTMupdatemodel(struct QTMmodel *model, int sym);
 577 int make_decode_table(cab_ULONG nsyms, cab_ULONG nbits, cab_UBYTE *length, cab_UWORD *table);
 578 cab_ULONG checksum(cab_UBYTE *data, cab_UWORD bytes, cab_ULONG csum);
 579
 580 #endif /* __WINE_CABINET_H */