Usenet 1994 October/usenetsourcesnewsgroupsinfomagicoctober1994disk2.iso/misc/volume44/unzip/part09

Internet Message Format | 1994-09-19 | 71KB

From: [e-mail] (Info-ZIP group)
Newsgroups: comp.sources.misc
Subject: v44i074:  unzip - Info-ZIP portable UnZip, version 5.12, Part09/20
Date: 18 Sep 1994 23:15:32 -0500
Organization: Sterling Software
Sender: [e-mail]
Approved: [e-mail]
Message-ID: <35j394$[e-mail]>
X-Md4-Signature: 2460b5521dcd2142b00bedcf80f343dc

Submitted-by: [e-mail] (Info-ZIP group)
Posting-number: Volume 44, Issue 74
Archive-name: unzip/part09
Environment: UNIX, VMS, OS/2, MS-DOS, MACINTOSH, WIN-NT, LINUX, MINIX, COHERENT, AMIGA?, ATARI TOS, SGI, DEC, Cray, Convex, Amdahl, Sun
Supersedes: unzip50: Volume 31, Issue 104-117

#! /bin/sh
# This is a shell archive.  Remove anything before this line, then feed it
# into a shell via "sh file" or similar.  To overwrite existing files,
# type "sh file -c".
# Contents:  unzip-5.12/explode.c unzip-5.12/inflate.c
# Wrapped by kent@sparky on Sat Sep 17 23:33:40 1994
PATH=/bin:/usr/bin:/usr/ucb:/usr/local/bin:/usr/lbin:$PATH ; export PATH
echo If this archive is complete, you will see the following message:
echo '          "shar: End of archive 9 (of 20)."'
if test -f 'unzip-5.12/explode.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'unzip-5.12/explode.c'\"
else
  echo shar: Extracting \"'unzip-5.12/explode.c'\" \(28523 characters\)
  sed "s/^X//" >'unzip-5.12/explode.c' <<'END_OF_FILE'
X/* explode.c -- put in the public domain by Mark Adler
X   version c13, 25 August 1994 */
X
X
X/* You can do whatever you like with this source file, though I would
X   prefer that if you modify it and redistribute it that you include
X   comments to that effect with your name and the date.  Thank you.
X
X   History:
X   vers    date          who           what
X   ----  ---------  --------------  ------------------------------------
X    c1   30 Mar 92  M. Adler        explode that uses huft_build from inflate
X                                    (this gives over a 70% speed improvement
X                                    over the original unimplode.c, which
X                                    decoded a bit at a time)
X    c2    4 Apr 92  M. Adler        fixed bug for file sizes a multiple of 32k.
X    c3   10 Apr 92  M. Adler        added a little memory tracking if DEBUG
X    c4   11 Apr 92  M. Adler        added NOMEMCPY do kill use of memcpy()
X    c5   21 Apr 92  M. Adler        added the WSIZE #define to allow reducing
X                                    the 32K window size for specialized
X                                    applications.
X    c6   31 May 92  M. Adler        added typecasts to eliminate some warnings
X    c7   27 Jun 92  G. Roelofs      added more typecasts.
X    c8   17 Oct 92  G. Roelofs      changed ULONG/UWORD/byte to ulg/ush/uch.
X    c9   19 Jul 93  J. Bush         added more typecasts (to return values);
X                                    made l[256] array static for Amiga.
X    c10   8 Oct 93  G. Roelofs      added used_csize for diagnostics; added
X                                    buf and unshrink arguments to flush();
X                                    undef'd various macros at end for Turbo C;
X                                    removed NEXTBYTE macro (now in unzip.h)
X                                    and bytebuf variable (not used); changed
X                                    memset() to memzero().
X    c11   9 Jan 94  M. Adler        fixed incorrect used_csize calculation.
X    c12   9 Apr 94  G. Roelofs      fixed split comments on preprocessor lines
X                                    to avoid bug in Encore compiler.
X    c13  25 Aug 94  M. Adler        fixed distance-length comment (orig c9 fix)
X */
X
X
X/*
X   Explode imploded (PKZIP method 6 compressed) data.  This compression
X   method searches for as much of the current string of bytes (up to a length
X   of ~320) in the previous 4K or 8K bytes.  If it doesn't find any matches
X   (of at least length 2 or 3), it codes the next byte.  Otherwise, it codes
X   the length of the matched string and its distance backwards from the
X   current position.  Single bytes ("literals") are preceded by a one (a
X   single bit) and are either uncoded (the eight bits go directly into the
X   compressed stream for a total of nine bits) or Huffman coded with a
X   supplied literal code tree.  If literals are coded, then the minimum match
X   length is three, otherwise it is two.
X
X   There are therefore four kinds of imploded streams: 8K search with coded
X   literals (min match = 3), 4K search with coded literals (min match = 3),
X   8K with uncoded literals (min match = 2), and 4K with uncoded literals
X   (min match = 2).  The kind of stream is identified in two bits of a
X   general purpose bit flag that is outside of the compressed stream.
X
X   Distance-length pairs for matched strings are preceded by a zero bit (to
X   distinguish them from literals) and are always coded.  The distance comes
X   first and is either the low six (4K) or low seven (8K) bits of the
X   distance (uncoded), followed by the high six bits of the distance coded.
X   Then the length is six bits coded (0..63 + min match length), and if the
X   maximum such length is coded, then it's followed by another eight bits
X   (uncoded) to be added to the coded length.  This gives a match length
X   range of 2..320 or 3..321 bytes.
X
X   The literal, length, and distance codes are all represented in a slightly
X   compressed form themselves.  What is sent are the lengths of the codes for
X   each value, which is sufficient to construct the codes.  Each byte of the
X   code representation is the code length (the low four bits representing
X   1..16), and the number of values sequentially with that length (the high
X   four bits also representing 1..16).  There are 256 literal code values (if
X   literals are coded), 64 length code values, and 64 distance code values,
X   in that order at the beginning of the compressed stream.  Each set of code
X   values is preceded (redundantly) with a byte indicating how many bytes are
X   in the code description that follows, in the range 1..256.
X
X   The codes themselves are decoded using tables made by huft_build() from
X   the bit lengths.  That routine and its comments are in the inflate.c
X   module.
X */
X
X#include "unzip.h"      /* must supply slide[] (uch) array and NEXTBYTE macro */
X
X#ifndef WSIZE
X#  define WSIZE 0x8000  /* window size--must be a power of two, and */
X#endif                  /* at least 8K for zip's implode method */
X
X
Xstruct huft {
X  uch e;                /* number of extra bits or operation */
X  uch b;                /* number of bits in this code or subcode */
X  union {
X    ush n;              /* literal, length base, or distance base */
X    struct huft *t;     /* pointer to next level of table */
X  } v;
X};
X
X/* Function prototypes */
X/* routines from inflate.c */
Xextern unsigned hufts;
Xint huft_build OF((unsigned *, unsigned, unsigned, ush *, ush *,
X                   struct huft **, int *));
Xint huft_free OF((struct huft *));
X
X/* routines here */
Xint get_tree OF((unsigned *, unsigned));
Xint explode_lit8 OF((struct huft *, struct huft *, struct huft *,
X                     int, int, int));
Xint explode_lit4 OF((struct huft *, struct huft *, struct huft *,
X                     int, int, int));
Xint explode_nolit8 OF((struct huft *, struct huft *, int, int));
Xint explode_nolit4 OF((struct huft *, struct huft *, int, int));
Xint explode OF((void));
X
X
X/* The implode algorithm uses a sliding 4K or 8K byte window on the
X   uncompressed stream to find repeated byte strings.  This is implemented
X   here as a circular buffer.  The index is updated simply by incrementing
X   and then and'ing with 0x0fff (4K-1) or 0x1fff (8K-1).  Here, the 32K
X   buffer of inflate is used, and it works just as well to always have
X   a 32K circular buffer, so the index is anded with 0x7fff.  This is
X   done to allow the window to also be used as the output buffer. */
X/* This must be supplied in an external module useable like "uch slide[8192];"
X   or "uch *slide;", where the latter would be malloc'ed.  In unzip, slide[]
X   is actually a 32K area for use by inflate, which uses a 32K sliding window.
X */
X
X
X/* Tables for length and distance */
Xush cplen2[] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
X        18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34,
X        35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,
X        52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65};
Xush cplen3[] = {3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
X        19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
X        36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,
X        53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66};
Xush extra[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
X        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
X        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
X        8};
Xush cpdist4[] = {1, 65, 129, 193, 257, 321, 385, 449, 513, 577, 641, 705,
X        769, 833, 897, 961, 1025, 1089, 1153, 1217, 1281, 1345, 1409, 1473,
X        1537, 1601, 1665, 1729, 1793, 1857, 1921, 1985, 2049, 2113, 2177,
X        2241, 2305, 2369, 2433, 2497, 2561, 2625, 2689, 2753, 2817, 2881,
X        2945, 3009, 3073, 3137, 3201, 3265, 3329, 3393, 3457, 3521, 3585,
X        3649, 3713, 3777, 3841, 3905, 3969, 4033};
Xush cpdist8[] = {1, 129, 257, 385, 513, 641, 769, 897, 1025, 1153, 1281,
X        1409, 1537, 1665, 1793, 1921, 2049, 2177, 2305, 2433, 2561, 2689,
X        2817, 2945, 3073, 3201, 3329, 3457, 3585, 3713, 3841, 3969, 4097,
X        4225, 4353, 4481, 4609, 4737, 4865, 4993, 5121, 5249, 5377, 5505,
X        5633, 5761, 5889, 6017, 6145, 6273, 6401, 6529, 6657, 6785, 6913,
X        7041, 7169, 7297, 7425, 7553, 7681, 7809, 7937, 8065};
X
X
X/* Macros for inflate() bit peeking and grabbing.
X   The usage is:
X
X        NEEDBITS(j)
X        x = b & mask_bits[j];
X        DUMPBITS(j)
X
X   where NEEDBITS makes sure that b has at least j bits in it, and
X   DUMPBITS removes the bits from b.  The macros use the variable k
X   for the number of bits in b.  Normally, b and k are register
X   variables for speed.
X */
X
X#define NEEDBITS(n) {while(k<(n)){b|=((ulg)NEXTBYTE)<<k;k+=8;}}
X#define DUMPBITS(n) {b>>=(n);k-=(n);}
X
X
X
Xint get_tree(l, n)
Xunsigned *l;            /* bit lengths */
Xunsigned n;             /* number expected */
X/* Get the bit lengths for a code representation from the compressed
X   stream.  If get_tree() returns 4, then there is an error in the data.
X   Otherwise zero is returned. */
X{
X  unsigned i;           /* bytes remaining in list */
X  unsigned k;           /* lengths entered */
X  unsigned j;           /* number of codes */
X  unsigned b;           /* bit length for those codes */
X
X
X  /* get bit lengths */
X  i = NEXTBYTE + 1;                     /* length/count pairs to read */
X  k = 0;                                /* next code */
X  do {
X    b = ((j = NEXTBYTE) & 0xf) + 1;     /* bits in code (1..16) */
X    j = ((j & 0xf0) >> 4) + 1;          /* codes with those bits (1..16) */
X    if (k + j > n)
X      return 4;                         /* don't overflow l[] */
X    do {
X      l[k++] = b;
X    } while (--j);
X  } while (--i);
X  return k != n ? 4 : 0;                /* should have read n of them */
X}
X
X
X
Xint explode_lit8(tb, tl, td, bb, bl, bd)
Xstruct huft *tb, *tl, *td;      /* literal, length, and distance tables */
Xint bb, bl, bd;                 /* number of bits decoded by those */
X/* Decompress the imploded data using coded literals and an 8K sliding
X   window. */
X{
X  long s;               /* bytes to decompress */
X  register unsigned e;  /* table entry flag/number of extra bits */
X  unsigned n, d;        /* length and index for copy */
X  unsigned w;           /* current window position */
X  struct huft *t;       /* pointer to table entry */
X  unsigned mb, ml, md;  /* masks for bb, bl, and bd bits */
X  register ulg b;       /* bit buffer */
X  register unsigned k;  /* number of bits in bit buffer */
X  unsigned u;           /* true if unflushed */
X
X
X  /* explode the coded data */
X  b = k = w = 0;                /* initialize bit buffer, window */
X  u = 1;                        /* buffer unflushed */
X  mb = mask_bits[bb];           /* precompute masks for speed */
X  ml = mask_bits[bl];
X  md = mask_bits[bd];
X  s = ucsize;
X  while (s > 0)                 /* do until ucsize bytes uncompressed */
X  {
X    NEEDBITS(1)
X    if (b & 1)                  /* then literal--decode it */
X    {
X      DUMPBITS(1)
X      s--;
X      NEEDBITS((unsigned)bb)    /* get coded literal */
X      if ((e = (t = tb + ((~(unsigned)b) & mb))->e) > 16)
X        do {
X          if (e == 99)
X            return 1;
X          DUMPBITS(t->b)
X          e -= 16;
X          NEEDBITS(e)
X        } while ((e = (t = t->v.t + ((~(unsigned)b) & mask_bits[e]))->e) > 16);
X      DUMPBITS(t->b)
X      slide[w++] = (uch)t->v.n;
X      if (w == WSIZE)
X      {
X        flush(slide, w, 0);
X        w = u = 0;
X      }
X    }
X    else                        /* else distance/length */
X    {
X      DUMPBITS(1)
X      NEEDBITS(7)               /* get distance low bits */
X      d = (unsigned)b & 0x7f;
X      DUMPBITS(7)
X      NEEDBITS((unsigned)bd)    /* get coded distance high bits */
X      if ((e = (t = td + ((~(unsigned)b) & md))->e) > 16)
X        do {
X          if (e == 99)
X            return 1;
X          DUMPBITS(t->b)
X          e -= 16;
X          NEEDBITS(e)
X        } while ((e = (t = t->v.t + ((~(unsigned)b) & mask_bits[e]))->e) > 16);
X      DUMPBITS(t->b)
X      d = w - d - t->v.n;       /* construct offset */
X      NEEDBITS((unsigned)bl)    /* get coded length */
X      if ((e = (t = tl + ((~(unsigned)b) & ml))->e) > 16)
X        do {
X          if (e == 99)
X            return 1;
X          DUMPBITS(t->b)
X          e -= 16;
X          NEEDBITS(e)
X        } while ((e = (t = t->v.t + ((~(unsigned)b) & mask_bits[e]))->e) > 16);
X      DUMPBITS(t->b)
X      n = t->v.n;
X      if (e)                    /* get length extra bits */
X      {
X        NEEDBITS(8)
X        n += (unsigned)b & 0xff;
X        DUMPBITS(8)
X      }
X
X      /* do the copy */
X      s -= n;
X      do {
X        n -= (e = (e = WSIZE - ((d &= WSIZE-1) > w ? d : w)) > n ? n : e);
X        if (u && w <= d)
X        {
X          memzero(slide + w, e);
X          w += e;
X          d += e;
X        }
X        else
X#ifndef NOMEMCPY
X          if (w - d >= e)       /* (this test assumes unsigned comparison) */
X          {
X            memcpy(slide + w, slide + d, e);
X            w += e;
X            d += e;
X          }
X          else                  /* do it slow to avoid memcpy() overlap */
X#endif /* !NOMEMCPY */
X            do {
X              slide[w++] = slide[d++];
X            } while (--e);
X        if (w == WSIZE)
X        {
X          flush(slide, w, 0);
X          w = u = 0;
X        }
X      } while (n);
X    }
X  }
X
X  /* flush out slide */
X  flush(slide, w, 0);
X  if (csize + (k >> 3))   /* should have read csize bytes, but sometimes */
X  {                       /* read one too many:  k>>3 compensates */
X    used_csize = lrec.csize - csize - (k >> 3);
X    return 5;
X  }
X  return 0;
X}
X
X
X
Xint explode_lit4(tb, tl, td, bb, bl, bd)
Xstruct huft *tb, *tl, *td;      /* literal, length, and distance tables */
Xint bb, bl, bd;                 /* number of bits decoded by those */
X/* Decompress the imploded data using coded literals and a 4K sliding
X   window. */
X{
X  long s;               /* bytes to decompress */
X  register unsigned e;  /* table entry flag/number of extra bits */
X  unsigned n, d;        /* length and index for copy */
X  unsigned w;           /* current window position */
X  struct huft *t;       /* pointer to table entry */
X  unsigned mb, ml, md;  /* masks for bb, bl, and bd bits */
X  register ulg b;       /* bit buffer */
X  register unsigned k;  /* number of bits in bit buffer */
X  unsigned u;           /* true if unflushed */
X
X
X  /* explode the coded data */
X  b = k = w = 0;                /* initialize bit buffer, window */
X  u = 1;                        /* buffer unflushed */
X  mb = mask_bits[bb];           /* precompute masks for speed */
X  ml = mask_bits[bl];
X  md = mask_bits[bd];
X  s = ucsize;
X  while (s > 0)                 /* do until ucsize bytes uncompressed */
X  {
X    NEEDBITS(1)
X    if (b & 1)                  /* then literal--decode it */
X    {
X      DUMPBITS(1)
X      s--;
X      NEEDBITS((unsigned)bb)    /* get coded literal */
X      if ((e = (t = tb + ((~(unsigned)b) & mb))->e) > 16)
X        do {
X          if (e == 99)
X            return 1;
X          DUMPBITS(t->b)
X          e -= 16;
X          NEEDBITS(e)
X        } while ((e = (t = t->v.t + ((~(unsigned)b) & mask_bits[e]))->e) > 16);
X      DUMPBITS(t->b)
X      slide[w++] = (uch)t->v.n;
X      if (w == WSIZE)
X      {
X        flush(slide, w, 0);
X        w = u = 0;
X      }
X    }
X    else                        /* else distance/length */
X    {
X      DUMPBITS(1)
X      NEEDBITS(6)               /* get distance low bits */
X      d = (unsigned)b & 0x3f;
X      DUMPBITS(6)
X      NEEDBITS((unsigned)bd)    /* get coded distance high bits */
X      if ((e = (t = td + ((~(unsigned)b) & md))->e) > 16)
X        do {
X          if (e == 99)
X            return 1;
X          DUMPBITS(t->b)
X          e -= 16;
X          NEEDBITS(e)
X        } while ((e = (t = t->v.t + ((~(unsigned)b) & mask_bits[e]))->e) > 16);
X      DUMPBITS(t->b)
X      d = w - d - t->v.n;       /* construct offset */
X      NEEDBITS((unsigned)bl)    /* get coded length */
X      if ((e = (t = tl + ((~(unsigned)b) & ml))->e) > 16)
X        do {
X          if (e == 99)
X            return 1;
X          DUMPBITS(t->b)
X          e -= 16;
X          NEEDBITS(e)
X        } while ((e = (t = t->v.t + ((~(unsigned)b) & mask_bits[e]))->e) > 16);
X      DUMPBITS(t->b)
X      n = t->v.n;
X      if (e)                    /* get length extra bits */
X      {
X        NEEDBITS(8)
X        n += (unsigned)b & 0xff;
X        DUMPBITS(8)
X      }
X
X      /* do the copy */
X      s -= n;
X      do {
X        n -= (e = (e = WSIZE - ((d &= WSIZE-1) > w ? d : w)) > n ? n : e);
X        if (u && w <= d)
X        {
X          memzero(slide + w, e);
X          w += e;
X          d += e;
X        }
X        else
X#ifndef NOMEMCPY
X          if (w - d >= e)       /* (this test assumes unsigned comparison) */
X          {
X            memcpy(slide + w, slide + d, e);
X            w += e;
X            d += e;
X          }
X          else                  /* do it slow to avoid memcpy() overlap */
X#endif /* !NOMEMCPY */
X            do {
X              slide[w++] = slide[d++];
X            } while (--e);
X        if (w == WSIZE)
X        {
X          flush(slide, w, 0);
X          w = u = 0;
X        }
X      } while (n);
X    }
X  }
X
X  /* flush out slide */
X  flush(slide, w, 0);
X  if (csize + (k >> 3))   /* should have read csize bytes, but sometimes */
X  {                       /* read one too many:  k>>3 compensates */
X    used_csize = lrec.csize - csize - (k >> 3);
X    return 5;
X  }
X  return 0;
X}
X
X
X
Xint explode_nolit8(tl, td, bl, bd)
Xstruct huft *tl, *td;   /* length and distance decoder tables */
Xint bl, bd;             /* number of bits decoded by tl[] and td[] */
X/* Decompress the imploded data using uncoded literals and an 8K sliding
X   window. */
X{
X  long s;               /* bytes to decompress */
X  register unsigned e;  /* table entry flag/number of extra bits */
X  unsigned n, d;        /* length and index for copy */
X  unsigned w;           /* current window position */
X  struct huft *t;       /* pointer to table entry */
X  unsigned ml, md;      /* masks for bl and bd bits */
X  register ulg b;       /* bit buffer */
X  register unsigned k;  /* number of bits in bit buffer */
X  unsigned u;           /* true if unflushed */
X
X
X  /* explode the coded data */
X  b = k = w = 0;                /* initialize bit buffer, window */
X  u = 1;                        /* buffer unflushed */
X  ml = mask_bits[bl];           /* precompute masks for speed */
X  md = mask_bits[bd];
X  s = ucsize;
X  while (s > 0)                 /* do until ucsize bytes uncompressed */
X  {
X    NEEDBITS(1)
X    if (b & 1)                  /* then literal--get eight bits */
X    {
X      DUMPBITS(1)
X      s--;
X      NEEDBITS(8)
X      slide[w++] = (uch)b;
X      if (w == WSIZE)
X      {
X        flush(slide, w, 0);
X        w = u = 0;
X      }
X      DUMPBITS(8)
X    }
X    else                        /* else distance/length */
X    {
X      DUMPBITS(1)
X      NEEDBITS(7)               /* get distance low bits */
X      d = (unsigned)b & 0x7f;
X      DUMPBITS(7)
X      NEEDBITS((unsigned)bd)    /* get coded distance high bits */
X      if ((e = (t = td + ((~(unsigned)b) & md))->e) > 16)
X        do {
X          if (e == 99)
X            return 1;
X          DUMPBITS(t->b)
X          e -= 16;
X          NEEDBITS(e)
X        } while ((e = (t = t->v.t + ((~(unsigned)b) & mask_bits[e]))->e) > 16);
X      DUMPBITS(t->b)
X      d = w - d - t->v.n;       /* construct offset */
X      NEEDBITS((unsigned)bl)    /* get coded length */
X      if ((e = (t = tl + ((~(unsigned)b) & ml))->e) > 16)
X        do {
X          if (e == 99)
X            return 1;
X          DUMPBITS(t->b)
X          e -= 16;
X          NEEDBITS(e)
X        } while ((e = (t = t->v.t + ((~(unsigned)b) & mask_bits[e]))->e) > 16);
X      DUMPBITS(t->b)
X      n = t->v.n;
X      if (e)                    /* get length extra bits */
X      {
X        NEEDBITS(8)
X        n += (unsigned)b & 0xff;
X        DUMPBITS(8)
X      }
X
X      /* do the copy */
X      s -= n;
X      do {
X        n -= (e = (e = WSIZE - ((d &= WSIZE-1) > w ? d : w)) > n ? n : e);
X        if (u && w <= d)
X        {
X          memzero(slide + w, e);
X          w += e;
X          d += e;
X        }
X        else
X#ifndef NOMEMCPY
X          if (w - d >= e)       /* (this test assumes unsigned comparison) */
X          {
X            memcpy(slide + w, slide + d, e);
X            w += e;
X            d += e;
X          }
X          else                  /* do it slow to avoid memcpy() overlap */
X#endif /* !NOMEMCPY */
X            do {
X              slide[w++] = slide[d++];
X            } while (--e);
X        if (w == WSIZE)
X        {
X          flush(slide, w, 0);
X          w = u = 0;
X        }
X      } while (n);
X    }
X  }
X
X  /* flush out slide */
X  flush(slide, w, 0);
X  if (csize + (k >> 3))   /* should have read csize bytes, but sometimes */
X  {                       /* read one too many:  k>>3 compensates */
X    used_csize = lrec.csize - csize - (k >> 3);
X    return 5;
X  }
X  return 0;
X}
X
X
X
Xint explode_nolit4(tl, td, bl, bd)
Xstruct huft *tl, *td;   /* length and distance decoder tables */
Xint bl, bd;             /* number of bits decoded by tl[] and td[] */
X/* Decompress the imploded data using uncoded literals and a 4K sliding
X   window. */
X{
X  long s;               /* bytes to decompress */
X  register unsigned e;  /* table entry flag/number of extra bits */
X  unsigned n, d;        /* length and index for copy */
X  unsigned w;           /* current window position */
X  struct huft *t;       /* pointer to table entry */
X  unsigned ml, md;      /* masks for bl and bd bits */
X  register ulg b;       /* bit buffer */
X  register unsigned k;  /* number of bits in bit buffer */
X  unsigned u;           /* true if unflushed */
X
X
X  /* explode the coded data */
X  b = k = w = 0;                /* initialize bit buffer, window */
X  u = 1;                        /* buffer unflushed */
X  ml = mask_bits[bl];           /* precompute masks for speed */
X  md = mask_bits[bd];
X  s = ucsize;
X  while (s > 0)                 /* do until ucsize bytes uncompressed */
X  {
X    NEEDBITS(1)
X    if (b & 1)                  /* then literal--get eight bits */
X    {
X      DUMPBITS(1)
X      s--;
X      NEEDBITS(8)
X      slide[w++] = (uch)b;
X      if (w == WSIZE)
X      {
X        flush(slide, w, 0);
X        w = u = 0;
X      }
X      DUMPBITS(8)
X    }
X    else                        /* else distance/length */
X    {
X      DUMPBITS(1)
X      NEEDBITS(6)               /* get distance low bits */
X      d = (unsigned)b & 0x3f;
X      DUMPBITS(6)
X      NEEDBITS((unsigned)bd)    /* get coded distance high bits */
X      if ((e = (t = td + ((~(unsigned)b) & md))->e) > 16)
X        do {
X          if (e == 99)
X            return 1;
X          DUMPBITS(t->b)
X          e -= 16;
X          NEEDBITS(e)
X        } while ((e = (t = t->v.t + ((~(unsigned)b) & mask_bits[e]))->e) > 16);
X      DUMPBITS(t->b)
X      d = w - d - t->v.n;       /* construct offset */
X      NEEDBITS((unsigned)bl)    /* get coded length */
X      if ((e = (t = tl + ((~(unsigned)b) & ml))->e) > 16)
X        do {
X          if (e == 99)
X            return 1;
X          DUMPBITS(t->b)
X          e -= 16;
X          NEEDBITS(e)
X        } while ((e = (t = t->v.t + ((~(unsigned)b) & mask_bits[e]))->e) > 16);
X      DUMPBITS(t->b)
X      n = t->v.n;
X      if (e)                    /* get length extra bits */
X      {
X        NEEDBITS(8)
X        n += (unsigned)b & 0xff;
X        DUMPBITS(8)
X      }
X
X      /* do the copy */
X      s -= n;
X      do {
X        n -= (e = (e = WSIZE - ((d &= WSIZE-1) > w ? d : w)) > n ? n : e);
X        if (u && w <= d)
X        {
X          memzero(slide + w, e);
X          w += e;
X          d += e;
X        }
X        else
X#ifndef NOMEMCPY
X          if (w - d >= e)       /* (this test assumes unsigned comparison) */
X          {
X            memcpy(slide + w, slide + d, e);
X            w += e;
X            d += e;
X          }
X          else                  /* do it slow to avoid memcpy() overlap */
X#endif /* !NOMEMCPY */
X            do {
X              slide[w++] = slide[d++];
X            } while (--e);
X        if (w == WSIZE)
X        {
X          flush(slide, w, 0);
X          w = u = 0;
X        }
X      } while (n);
X    }
X  }
X
X  /* flush out slide */
X  flush(slide, w, 0);
X  if (csize + (k >> 3))   /* should have read csize bytes, but sometimes */
X  {                       /* read one too many:  k>>3 compensates */
X    used_csize = lrec.csize - csize - (k >> 3);
X    return 5;
X  }
X  return 0;
X}
X
X
X
Xint explode()
X/* Explode an imploded compressed stream.  Based on the general purpose
X   bit flag, decide on coded or uncoded literals, and an 8K or 4K sliding
X   window.  Construct the literal (if any), length, and distance codes and
X   the tables needed to decode them (using huft_build() from inflate.c),
X   and call the appropriate routine for the type of data in the remainder
X   of the stream.  The four routines are nearly identical, differing only
X   in whether the literal is decoded or simply read in, and in how many
X   bits are read in, uncoded, for the low distance bits. */
X{
X  unsigned r;           /* return codes */
X  struct huft *tb;      /* literal code table */
X  struct huft *tl;      /* length code table */
X  struct huft *td;      /* distance code table */
X  int bb;               /* bits for tb */
X  int bl;               /* bits for tl */
X  int bd;               /* bits for td */
X  static unsigned l[256]; /* bit lengths for codes */
X
X
X  /* Tune base table sizes.  Note: I thought that to truly optimize speed,
X     I would have to select different bl, bd, and bb values for different
X     compressed file sizes.  I was suprised to find out the the values of
X     7, 7, and 9 worked best over a very wide range of sizes, except that
X     bd = 8 worked marginally better for large compressed sizes. */
X  bl = 7;
X  bd = csize > 200000L ? 8 : 7;
X
X
X  /* With literal tree--minimum match length is 3 */
X  hufts = 0;                    /* initialize huft's malloc'ed */
X  if (lrec.general_purpose_bit_flag & 4)
X  {
X    bb = 9;                     /* base table size for literals */
X    if ((r = get_tree(l, 256)) != 0)
X      return (int)r;
X    if ((r = huft_build(l, 256, 256, NULL, NULL, &tb, &bb)) != 0)
X    {
X      if (r == 1)
X        huft_free(tb);
X      return (int)r;
X    }
X    if ((r = get_tree(l, 64)) != 0)
X      return (int)r;
X    if ((r = huft_build(l, 64, 0, cplen3, extra, &tl, &bl)) != 0)
X    {
X      if (r == 1)
X        huft_free(tl);
X      huft_free(tb);
X      return (int)r;
X    }
X    if ((r = get_tree(l, 64)) != 0)
X      return (int)r;
X    if (lrec.general_purpose_bit_flag & 2)      /* true if 8K */
X    {
X      if ((r = huft_build(l, 64, 0, cpdist8, extra, &td, &bd)) != 0)
X      {
X        if (r == 1)
X          huft_free(td);
X        huft_free(tl);
X        huft_free(tb);
X        return (int)r;
X      }
X      r = explode_lit8(tb, tl, td, bb, bl, bd);
X    }
X    else                                        /* else 4K */
X    {
X      if ((r = huft_build(l, 64, 0, cpdist4, extra, &td, &bd)) != 0)
X      {
X        if (r == 1)
X          huft_free(td);
X        huft_free(tl);
X        huft_free(tb);
X        return (int)r;
X      }
X      r = explode_lit4(tb, tl, td, bb, bl, bd);
X    }
X    huft_free(td);
X    huft_free(tl);
X    huft_free(tb);
X  }
X  else
X
X
X  /* No literal tree--minimum match length is 2 */
X  {
X    if ((r = get_tree(l, 64)) != 0)
X      return (int)r;
X    if ((r = huft_build(l, 64, 0, cplen2, extra, &tl, &bl)) != 0)
X    {
X      if (r == 1)
X        huft_free(tl);
X      return (int)r;
X    }
X    if ((r = get_tree(l, 64)) != 0)
X      return (int)r;
X    if (lrec.general_purpose_bit_flag & 2)      /* true if 8K */
X    {
X      if ((r = huft_build(l, 64, 0, cpdist8, extra, &td, &bd)) != 0)
X      {
X        if (r == 1)
X          huft_free(td);
X        huft_free(tl);
X        return (int)r;
X      }
X      r = explode_nolit8(tl, td, bl, bd);
X    }
X    else                                        /* else 4K */
X    {
X      if ((r = huft_build(l, 64, 0, cpdist4, extra, &td, &bd)) != 0)
X      {
X        if (r == 1)
X          huft_free(td);
X        huft_free(tl);
X        return (int)r;
X      }
X      r = explode_nolit4(tl, td, bl, bd);
X    }
X    huft_free(td);
X    huft_free(tl);
X  }
X#ifdef DEBUG
X  fprintf(stderr, "<%u > ", hufts);
X#endif /* DEBUG */
X  return (int)r;
X}
X
X/* so explode.c and inflate.c can be compiled together into one object: */
X#undef NEXTBYTE
X#undef NEEDBITS
X#undef DUMPBITS
END_OF_FILE
  if test 28523 -ne `wc -c <'unzip-5.12/explode.c'`; then
    echo shar: \"'unzip-5.12/explode.c'\" unpacked with wrong size!
  fi
  # end of 'unzip-5.12/explode.c'
fi
if test -f 'unzip-5.12/inflate.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'unzip-5.12/inflate.c'\"
else
  echo shar: Extracting \"'unzip-5.12/inflate.c'\" \(38275 characters\)
  sed "s/^X//" >'unzip-5.12/inflate.c' <<'END_OF_FILE'
X/* inflate.c -- put in the public domain by Mark Adler
X   version c14o, 23 August 1994 */
X
X
X/* You can do whatever you like with this source file, though I would
X   prefer that if you modify it and redistribute it that you include
X   comments to that effect with your name and the date.  Thank you.
X
X   History:
X   vers    date          who           what
X   ----  ---------  --------------  ------------------------------------
X    a    ~~ Feb 92  M. Adler        used full (large, one-step) lookup table
X    b1   21 Mar 92  M. Adler        first version with partial lookup tables
X    b2   21 Mar 92  M. Adler        fixed bug in fixed-code blocks
X    b3   22 Mar 92  M. Adler        sped up match copies, cleaned up some
X    b4   25 Mar 92  M. Adler        added prototypes; removed window[] (now
X                                    is the responsibility of unzip.h--also
X                                    changed name to slide[]), so needs diffs
X                                    for unzip.c and unzip.h (this allows
X                                    compiling in the small model on MSDOS);
X                                    fixed cast of q in huft_build();
X    b5   26 Mar 92  M. Adler        got rid of unintended macro recursion.
X    b6   27 Mar 92  M. Adler        got rid of nextbyte() routine.  fixed
X                                    bug in inflate_fixed().
X    c1   30 Mar 92  M. Adler        removed lbits, dbits environment variables.
X                                    changed BMAX to 16 for explode.  Removed
X                                    OUTB usage, and replaced it with flush()--
X                                    this was a 20% speed improvement!  Added
X                                    an explode.c (to replace unimplod.c) that
X                                    uses the huft routines here.  Removed
X                                    register union.
X    c2    4 Apr 92  M. Adler        fixed bug for file sizes a multiple of 32k.
X    c3   10 Apr 92  M. Adler        reduced memory of code tables made by
X                                    huft_build significantly (factor of two to
X                                    three).
X    c4   15 Apr 92  M. Adler        added NOMEMCPY do kill use of memcpy().
X                                    worked around a Turbo C optimization bug.
X    c5   21 Apr 92  M. Adler        added the WSIZE #define to allow reducing
X                                    the 32K window size for specialized
X                                    applications.
X    c6   31 May 92  M. Adler        added some typecasts to eliminate warnings
X    c7   27 Jun 92  G. Roelofs      added some more typecasts (444:  MSC bug).
X    c8    5 Oct 92  J-l. Gailly     added ifdef'd code to deal with PKZIP bug.
X    c9    9 Oct 92  M. Adler        removed a memory error message (~line 416).
X    c10  17 Oct 92  G. Roelofs      changed ULONG/UWORD/byte to ulg/ush/uch,
X                                    removed old inflate, renamed inflate_entry
X                                    to inflate, added Mark's fix to a comment.
X   c10.5 14 Dec 92  M. Adler        fix up error messages for incomplete trees.
X    c11   2 Jan 93  M. Adler        fixed bug in detection of incomplete
X                                    tables, and removed assumption that EOB is
X                                    the longest code (bad assumption).
X    c12   3 Jan 93  M. Adler        make tables for fixed blocks only once.
X    c13   5 Jan 93  M. Adler        allow all zero length codes (pkzip 2.04c
X                                    outputs one zero length code for an empty
X                                    distance tree).
X    c14  12 Mar 93  M. Adler        made inflate.c standalone with the
X                                    introduction of inflate.h.
X   c14b  16 Jul 93  G. Roelofs      added (unsigned) typecast to w at 470.
X   c14c  19 Jul 93  J. Bush         changed v[N_MAX], l[288], ll[28x+3x] arrays
X                                    to static for Amiga.
X   c14d  13 Aug 93  J-l. Gailly     de-complicatified Mark's c[*p++]++ thing.
X   c14e   8 Oct 93  G. Roelofs      changed memset() to memzero().
X   c14f  22 Oct 93  G. Roelofs      renamed quietflg to qflag; made Trace()
X                                    conditional; added inflate_free().
X   c14g  28 Oct 93  G. Roelofs      changed l/(lx+1) macro to pointer (Cray bug)
X   c14h   7 Dec 93  C. Ghisler      huft_build() optimizations.
X   c14i   9 Jan 94  A. Verheijen    set fixed_t{d,l} to NULL after freeing;
X                    G. Roelofs      check NEXTBYTE macro for EOF.
X   c14j  23 Jan 94  G. Roelofs      removed Ghisler "optimizations"; ifdef'd
X                                    EOF check.
X   c14k  27 Feb 94  G. Roelofs      added some typecasts to avoid warnings.
X   c14l   9 Apr 94  G. Roelofs      fixed split comments on preprocessor lines
X                                    to avoid bug in Encore compiler.
X   c14m   7 Jul 94  P. Kienitz      modified to allow assembler version of
X                                    inflate_codes() (define ASM_INFLATECODES)
X   c14n  22 Jul 94  G. Roelofs      changed fprintf to FPRINTF for DLL versions
X   c14o  23 Aug 94  C. Spieler      added a newline to a debug statement;
X                    G. Roelofs      added another typecast to avoid MSC warning
X */
X
X
X/*
X   Inflate deflated (PKZIP's method 8 compressed) data.  The compression
X   method searches for as much of the current string of bytes (up to a
X   length of 258) in the previous 32K bytes.  If it doesn't find any
X   matches (of at least length 3), it codes the next byte.  Otherwise, it
X   codes the length of the matched string and its distance backwards from
X   the current position.  There is a single Huffman code that codes both
X   single bytes (called "literals") and match lengths.  A second Huffman
X   code codes the distance information, which follows a length code.  Each
X   length or distance code actually represents a base value and a number
X   of "extra" (sometimes zero) bits to get to add to the base value.  At
X   the end of each deflated block is a special end-of-block (EOB) literal/
X   length code.  The decoding process is basically: get a literal/length
X   code; if EOB then done; if a literal, emit the decoded byte; if a
X   length then get the distance and emit the referred-to bytes from the
X   sliding window of previously emitted data.
X
X   There are (currently) three kinds of inflate blocks: stored, fixed, and
X   dynamic.  The compressor outputs a chunk of data at a time and decides
X   which method to use on a chunk-by-chunk basis.  A chunk might typically
X   be 32K to 64K, uncompressed.  If the chunk is uncompressible, then the
X   "stored" method is used.  In this case, the bytes are simply stored as
X   is, eight bits per byte, with none of the above coding.  The bytes are
X   preceded by a count, since there is no longer an EOB code.
X
X   If the data is compressible, then either the fixed or dynamic methods
X   are used.  In the dynamic method, the compressed data is preceded by
X   an encoding of the literal/length and distance Huffman codes that are
X   to be used to decode this block.  The representation is itself Huffman
X   coded, and so is preceded by a description of that code.  These code
X   descriptions take up a little space, and so for small blocks, there is
X   a predefined set of codes, called the fixed codes.  The fixed method is
X   used if the block ends up smaller that way (usually for quite small
X   chunks); otherwise the dynamic method is used.  In the latter case, the
X   codes are customized to the probabilities in the current block and so
X   can code it much better than the pre-determined fixed codes can.
X
X   The Huffman codes themselves are decoded using a mutli-level table
X   lookup, in order to maximize the speed of decoding plus the speed of
X   building the decoding tables.  See the comments below that precede the
X   lbits and dbits tuning parameters.
X */
X
X
X/*
X   Notes beyond the 1.93a appnote.txt:
X
X   1. Distance pointers never point before the beginning of the output
X      stream.
X   2. Distance pointers can point back across blocks, up to 32k away.
X   3. There is an implied maximum of 7 bits for the bit length table and
X      15 bits for the actual data.
X   4. If only one code exists, then it is encoded using one bit.  (Zero
X      would be more efficient, but perhaps a little confusing.)  If two
X      codes exist, they are coded using one bit each (0 and 1).
X   5. There is no way of sending zero distance codes--a dummy must be
X      sent if there are none.  (History: a pre 2.0 version of PKZIP would
X      store blocks with no distance codes, but this was discovered to be
X      too harsh a criterion.)  Valid only for 1.93a.  2.04c does allow
X      zero distance codes, which is sent as one code of zero bits in
X      length.
X   6. There are up to 286 literal/length codes.  Code 256 represents the
X      end-of-block.  Note however that the static length tree defines
X      288 codes just to fill out the Huffman codes.  Codes 286 and 287
X      cannot be used though, since there is no length base or extra bits
X      defined for them.  Similarily, there are up to 30 distance codes.
X      However, static trees define 32 codes (all 5 bits) to fill out the
X      Huffman codes, but the last two had better not show up in the data.
X   7. Unzip can check dynamic Huffman blocks for complete code sets.
X      The exception is that a single code would not be complete (see #4).
X   8. The five bits following the block type is really the number of
X      literal codes sent minus 257.
X   9. Length codes 8,16,16 are interpreted as 13 length codes of 8 bits
X      (1+6+6).  Therefore, to output three times the length, you output
X      three codes (1+1+1), whereas to output four times the same length,
X      you only need two codes (1+3).  Hmm.
X  10. In the tree reconstruction algorithm, Code = Code + Increment
X      only if BitLength(i) is not zero.  (Pretty obvious.)
X  11. Correction: 4 Bits: # of Bit Length codes - 4     (4 - 19)
X  12. Note: length code 284 can represent 227-258, but length code 285
X      really is 258.  The last length deserves its own, short code
X      since it gets used a lot in very redundant files.  The length
X      258 is special since 258 - 3 (the min match length) is 255.
X  13. The literal/length and distance code bit lengths are read as a
X      single stream of lengths.  It is possible (and advantageous) for
X      a repeat code (16, 17, or 18) to go across the boundary between
X      the two sets of lengths.
X */
X
X
X#define PKZIP_BUG_WORKAROUND    /* PKZIP 1.93a problem--live with it */
X
X/*
X    inflate.h must supply the uch slide[WSIZE] array and the NEXTBYTE,
X    FLUSH() and memzero macros.  If the window size is not 32K, it
X    should also define WSIZE.  If INFMOD is defined, it can include
X    compiled functions to support the NEXTBYTE and/or FLUSH() macros.
X    There are defaults for NEXTBYTE and FLUSH() below for use as
X    examples of what those functions need to do.  Normally, you would
X    also want FLUSH() to compute a crc on the data.  inflate.h also
X    needs to provide these typedefs:
X
X        typedef unsigned char uch;
X        typedef unsigned short ush;
X        typedef unsigned long ulg;
X
X    This module uses the external functions malloc() and free() (and
X    probably memset() or bzero() in the memzero() macro).  Their
X    prototypes are normally found in <string.h> and <stdlib.h>.
X */
X#define INFMOD          /* tell inflate.h to include code to be compiled */
X#include "inflate.h"
X
X#ifndef WSIZE           /* default is 32K */
X#  define WSIZE 0x8000  /* window size--must be a power of two, and at least */
X#endif                  /* 32K for zip's deflate method */
X
X#ifndef NEXTBYTE        /* default is to simply get a byte from stdin */
X#  define NEXTBYTE getchar()
X#endif
X
X#ifndef FPRINTF
X#  define FPRINTF fprintf
X#endif
X
X#ifndef FLUSH           /* default is to simply write the buffer to stdout */
X#  define FLUSH(n) fwrite(slide, 1, n, stdout)  /* return value not used */
X#endif
X/* Warning: the fwrite above might not work on 16-bit compilers, since
X   0x8000 might be interpreted as -32,768 by the library function. */
X
X#ifndef Trace
X#  ifdef DEBUG
X#    define Trace(x) fprintf x
X#  else
X#    define Trace(x)
X#  endif
X#endif
X
X
X/* Huffman code lookup table entry--this entry is four bytes for machines
X   that have 16-bit pointers (e.g. PC's in the small or medium model).
X   Valid extra bits are 0..13.  e == 15 is EOB (end of block), e == 16
X   means that v is a literal, 16 < e < 32 means that v is a pointer to
X   the next table, which codes e - 16 bits, and lastly e == 99 indicates
X   an unused code.  If a code with e == 99 is looked up, this implies an
X   error in the data. */
Xstruct huft {
X  uch e;                /* number of extra bits or operation */
X  uch b;                /* number of bits in this code or subcode */
X  union {
X    ush n;              /* literal, length base, or distance base */
X    struct huft *t;     /* pointer to next level of table */
X  } v;
X};
X
X
X/* Function prototypes */
X#ifndef OF
X#  ifdef __STDC__
X#    define OF(a) a
X#  else /* !__STDC__ */
X#    define OF(a) ()
X#  endif /* ?__STDC__ */
X#endif
Xint huft_build OF((unsigned *, unsigned, unsigned, ush *, ush *,
X                   struct huft **, int *));
Xint huft_free OF((struct huft *));
Xint inflate_codes OF((struct huft *, struct huft *, int, int));
Xint inflate_stored OF((void));
Xint inflate_fixed OF((void));
Xint inflate_dynamic OF((void));
Xint inflate_block OF((int *));
Xint inflate OF((void));
Xint inflate_free OF((void));
X
X
X/* The inflate algorithm uses a sliding 32K byte window on the uncompressed
X   stream to find repeated byte strings.  This is implemented here as a
X   circular buffer.  The index is updated simply by incrementing and then
X   and'ing with 0x7fff (32K-1). */
X/* It is left to other modules to supply the 32K area.  It is assumed
X   to be usable as if it were declared "uch slide[32768];" or as just
X   "uch *slide;" and then malloc'ed in the latter case.  The definition
X   must be in unzip.h, included above. */
Xunsigned wp;            /* current position in slide */
X
X
X/* Tables for deflate from PKZIP's appnote.txt. */
Xstatic unsigned border[] = {    /* Order of the bit length code lengths */
X        16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
Xstatic ush cplens[] = {         /* Copy lengths for literal codes 257..285 */
X        3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
X        35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
X        /* note: see note #13 above about the 258 in this list. */
Xstatic ush cplext[] = {         /* Extra bits for literal codes 257..285 */
X        0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2,
X        3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 99, 99}; /* 99==invalid */
Xstatic ush cpdist[] = {         /* Copy offsets for distance codes 0..29 */
X        1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
X        257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
X        8193, 12289, 16385, 24577};
Xstatic ush cpdext[] = {         /* Extra bits for distance codes */
X        0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
X        7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
X        12, 12, 13, 13};
X
X/* And'ing with mask[n] masks the lower n bits */
Xush mask[] = {
X    0x0000,
X    0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,
X    0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff
X};
X
X
X/* Macros for inflate() bit peeking and grabbing.
X   The usage is:
X
X        NEEDBITS(j)
X        x = b & mask[j];
X        DUMPBITS(j)
X
X   where NEEDBITS makes sure that b has at least j bits in it, and
X   DUMPBITS removes the bits from b.  The macros use the variable k
X   for the number of bits in b.  Normally, b and k are register
X   variables for speed, and are initialized at the begining of a
X   routine that uses these macros from a global bit buffer and count.
X
X   In order to not ask for more bits than there are in the compressed
X   stream, the Huffman tables are constructed to only ask for just
X   enough bits to make up the end-of-block code (value 256).  Then no
X   bytes need to be "returned" to the buffer at the end of the last
X   block.  See the huft_build() routine.
X */
X
Xulg bb;                         /* bit buffer */
Xunsigned bk;                    /* bits in bit buffer */
X
X#ifndef CHECK_EOF
X#  define NEEDBITS(n) {while(k<(n)){b|=((ulg)NEXTBYTE)<<k;k+=8;}}
X#else
X#  define NEEDBITS(n) {while(k<(n)){int c=NEXTBYTE;if(c==EOF)return 1;\
X    b|=((ulg)c)<<k;k+=8;}}
X#endif                      /* Piet Plomp:  change "return 1" to "break" */
X
X#define DUMPBITS(n) {b>>=(n);k-=(n);}
X
X
X/*
X   Huffman code decoding is performed using a multi-level table lookup.
X   The fastest way to decode is to simply build a lookup table whose
X   size is determined by the longest code.  However, the time it takes
X   to build this table can also be a factor if the data being decoded
X   is not very long.  The most common codes are necessarily the
X   shortest codes, so those codes dominate the decoding time, and hence
X   the speed.  The idea is you can have a shorter table that decodes the
X   shorter, more probable codes, and then point to subsidiary tables for
X   the longer codes.  The time it costs to decode the longer codes is
X   then traded against the time it takes to make longer tables.
X
X   This results of this trade are in the variables lbits and dbits
X   below.  lbits is the number of bits the first level table for literal/
X   length codes can decode in one step, and dbits is the same thing for
X   the distance codes.  Subsequent tables are also less than or equal to
X   those sizes.  These values may be adjusted either when all of the
X   codes are shorter than that, in which case the longest code length in
X   bits is used, or when the shortest code is *longer* than the requested
X   table size, in which case the length of the shortest code in bits is
X   used.
X
X   There are two different values for the two tables, since they code a
X   different number of possibilities each.  The literal/length table
X   codes 286 possible values, or in a flat code, a little over eight
X   bits.  The distance table codes 30 possible values, or a little less
X   than five bits, flat.  The optimum values for speed end up being
X   about one bit more than those, so lbits is 8+1 and dbits is 5+1.
X   The optimum values may differ though from machine to machine, and
X   possibly even between compilers.  Your mileage may vary.
X */
X
X
Xint lbits = 9;          /* bits in base literal/length lookup table */
Xint dbits = 6;          /* bits in base distance lookup table */
X
X
X/* If BMAX needs to be larger than 16, then h and x[] should be ulg. */
X#define BMAX 16         /* maximum bit length of any code (16 for explode) */
X#define N_MAX 288       /* maximum number of codes in any set */
X
X
Xunsigned hufts;         /* track memory usage */
X
X
Xint huft_build(b, n, s, d, e, t, m)
Xunsigned *b;            /* code lengths in bits (all assumed <= BMAX) */
Xunsigned n;             /* number of codes (assumed <= N_MAX) */
Xunsigned s;             /* number of simple-valued codes (0..s-1) */
Xush *d;                 /* list of base values for non-simple codes */
Xush *e;                 /* list of extra bits for non-simple codes */
Xstruct huft **t;        /* result: starting table */
Xint *m;                 /* maximum lookup bits, returns actual */
X/* Given a list of code lengths and a maximum table size, make a set of
X   tables to decode that set of codes.  Return zero on success, one if
X   the given code set is incomplete (the tables are still built in this
X   case), two if the input is invalid (all zero length codes or an
X   oversubscribed set of lengths), and three if not enough memory.
X   The code with value 256 is special, and the tables are constructed
X   so that no bits beyond that code are fetched when that code is
X   decoded. */
X{
X  unsigned a;                   /* counter for codes of length k */
X  unsigned c[BMAX+1];           /* bit length count table */
X  unsigned el;                  /* length of EOB code (value 256) */
X  unsigned f;                   /* i repeats in table every f entries */
X  int g;                        /* maximum code length */
X  int h;                        /* table level */
X  register unsigned i;          /* counter, current code */
X  register unsigned j;          /* counter */
X  register int k;               /* number of bits in current code */
X  int lx[BMAX+1];               /* memory for l[-1..BMAX-1] */
X  int *l = lx+1;                /* stack of bits per table */
X  register unsigned *p;         /* pointer into c[], b[], or v[] */
X  register struct huft *q;      /* points to current table */
X  struct huft r;                /* table entry for structure assignment */
X  struct huft *u[BMAX];         /* table stack */
X  static unsigned v[N_MAX];     /* values in order of bit length */
X  register int w;               /* bits before this table == (l * h) */
X  unsigned x[BMAX+1];           /* bit offsets, then code stack */
X  unsigned *xp;                 /* pointer into x */
X  int y;                        /* number of dummy codes added */
X  unsigned z;                   /* number of entries in current table */
X
X
X  /* Generate counts for each bit length */
X  el = n > 256 ? b[256] : BMAX; /* set length of EOB code, if any */
X  memzero((char *)c, sizeof(c));
X  p = b;  i = n;
X  do {
X    c[*p]++; p++;               /* assume all entries <= BMAX */
X  } while (--i);
X  if (c[0] == n)                /* null input--all zero length codes */
X  {
X    *t = (struct huft *)NULL;
X    *m = 0;
X    return 0;
X  }
X
X
X  /* Find minimum and maximum length, bound *m by those */
X  for (j = 1; j <= BMAX; j++)
X    if (c[j])
X      break;
X  k = j;                        /* minimum code length */
X  if ((unsigned)*m < j)
X    *m = j;
X  for (i = BMAX; i; i--)
X    if (c[i])
X      break;
X  g = i;                        /* maximum code length */
X  if ((unsigned)*m > i)
X    *m = i;
X
X
X  /* Adjust last length count to fill out codes, if needed */
X  for (y = 1 << j; j < i; j++, y <<= 1)
X    if ((y -= c[j]) < 0)
X      return 2;                 /* bad input: more codes than bits */
X  if ((y -= c[i]) < 0)
X    return 2;
X  c[i] += y;
X
X
X  /* Generate starting offsets into the value table for each length */
X  x[1] = j = 0;
X  p = c + 1;  xp = x + 2;
X  while (--i) {                 /* note that i == g from above */
X    *xp++ = (j += *p++);
X  }
X
X
X  /* Make a table of values in order of bit lengths */
X  p = b;  i = 0;
X  do {
X    if ((j = *p++) != 0)
X      v[x[j]++] = i;
X  } while (++i < n);
X
X
X  /* Generate the Huffman codes and for each, make the table entries */
X  x[0] = i = 0;                 /* first Huffman code is zero */
X  p = v;                        /* grab values in bit order */
X  h = -1;                       /* no tables yet--level -1 */
X  w = l[-1] = 0;                /* no bits decoded yet */
X  u[0] = (struct huft *)NULL;   /* just to keep compilers happy */
X  q = (struct huft *)NULL;      /* ditto */
X  z = 0;                        /* ditto */
X
X  /* go through the bit lengths (k already is bits in shortest code) */
X  for (; k <= g; k++)
X  {
X    a = c[k];
X    while (a--)
X    {
X      /* here i is the Huffman code of length k bits for value *p */
X      /* make tables up to required level */
X      while (k > w + l[h])
X      {
X        w += l[h++];            /* add bits already decoded */
X
X        /* compute minimum size table less than or equal to *m bits */
X        z = (z = g - w) > (unsigned)*m ? *m : z;        /* upper limit */
X        if ((f = 1 << (j = k - w)) > a + 1)     /* try a k-w bit table */
X        {                       /* too few codes for k-w bit table */
X          f -= a + 1;           /* deduct codes from patterns left */
X          xp = c + k;
X          while (++j < z)       /* try smaller tables up to z bits */
X          {
X            if ((f <<= 1) <= *++xp)
X              break;            /* enough codes to use up j bits */
X            f -= *xp;           /* else deduct codes from patterns */
X          }
X        }
X        if ((unsigned)w + j > el && (unsigned)w < el)
X          j = el - w;           /* make EOB code end at table */
X        z = 1 << j;             /* table entries for j-bit table */
X        l[h] = j;               /* set table size in stack */
X
X        /* allocate and link in new table */
X        if ((q = (struct huft *)malloc((z + 1)*sizeof(struct huft))) ==
X            (struct huft *)NULL)
X        {
X          if (h)
X            huft_free(u[0]);
X          return 3;             /* not enough memory */
X        }
X        hufts += z + 1;         /* track memory usage */
X        *t = q + 1;             /* link to list for huft_free() */
X        *(t = &(q->v.t)) = (struct huft *)NULL;
X        u[h] = ++q;             /* table starts after link */
X
X        /* connect to last table, if there is one */
X        if (h)
X        {
X          x[h] = i;             /* save pattern for backing up */
X          r.b = (uch)l[h-1];    /* bits to dump before this table */
X          r.e = (uch)(16 + j);  /* bits in this table */
X          r.v.t = q;            /* pointer to this table */
X          j = (i & ((1 << w) - 1)) >> (w - l[h-1]);
X          u[h-1][j] = r;        /* connect to last table */
X        }
X      }
X
X      /* set up table entry in r */
X      r.b = (uch)(k - w);
X      if (p >= v + n)
X        r.e = 99;               /* out of values--invalid code */
X      else if (*p < s)
X      {
X        r.e = (uch)(*p < 256 ? 16 : 15);    /* 256 is end-of-block code */
X        r.v.n = *p++;           /* simple code is just the value */
X      }
X      else
X      {
X        r.e = (uch)e[*p - s];   /* non-simple--look up in lists */
X        r.v.n = d[*p++ - s];
X      }
X
X      /* fill code-like entries with r */
X      f = 1 << (k - w);
X      for (j = i >> w; j < z; j += f)
X        q[j] = r;
X
X      /* backwards increment the k-bit code i */
X      for (j = 1 << (k - 1); i & j; j >>= 1)
X        i ^= j;
X      i ^= j;
X
X      /* backup over finished tables */
X      while ((i & ((1 << w) - 1)) != x[h])
X        w -= l[--h];            /* don't need to update q */
X    }
X  }
X
X
X  /* return actual size of base table */
X  *m = l[0];
X
X
X  /* Return true (1) if we were given an incomplete table */
X  return y != 0 && g != 1;
X}
X
X
X
Xint huft_free(t)
Xstruct huft *t;         /* table to free */
X/* Free the malloc'ed tables built by huft_build(), which makes a linked
X   list of the tables it made, with the links in a dummy first entry of
X   each table. */
X{
X  register struct huft *p, *q;
X
X
X  /* Go through linked list, freeing from the malloced (t[-1]) address. */
X  p = t;
X  while (p != (struct huft *)NULL)
X  {
X    q = (--p)->v.t;
X    free(p);
X    p = q;
X  }
X  return 0;
X}
X
X
X
X#ifdef ASM_INFLATECODES
X#  define inflate_codes(tl,td,bl,bd)  flate_codes(tl,td,bl,bd,(uch *)slide)
X   int flate_codes OF((struct huft *, struct huft *, int, int, uch *));
X
X#else
X
Xint inflate_codes(tl, td, bl, bd)
Xstruct huft *tl, *td;   /* literal/length and distance decoder tables */
Xint bl, bd;             /* number of bits decoded by tl[] and td[] */
X/* inflate (decompress) the codes in a deflated (compressed) block.
X   Return an error code or zero if it all goes ok. */
X{
X  register unsigned e;  /* table entry flag/number of extra bits */
X  unsigned n, d;        /* length and index for copy */
X  unsigned w;           /* current window position */
X  struct huft *t;       /* pointer to table entry */
X  unsigned ml, md;      /* masks for bl and bd bits */
X  register ulg b;       /* bit buffer */
X  register unsigned k;  /* number of bits in bit buffer */
X
X
X  /* make local copies of globals */
X  b = bb;                       /* initialize bit buffer */
X  k = bk;
X  w = wp;                       /* initialize window position */
X
X
X  /* inflate the coded data */
X  ml = mask[bl];           /* precompute masks for speed */
X  md = mask[bd];
X  while (1)                     /* do until end of block */
X  {
X    NEEDBITS((unsigned)bl)
X    if ((e = (t = tl + ((unsigned)b & ml))->e) > 16)
X      do {
X        if (e == 99)
X          return 1;
X        DUMPBITS(t->b)
X        e -= 16;
X        NEEDBITS(e)
X      } while ((e = (t = t->v.t + ((unsigned)b & mask[e]))->e) > 16);
X    DUMPBITS(t->b)
X    if (e == 16)                /* then it's a literal */
X    {
X      slide[w++] = (uch)t->v.n;
X      if (w == WSIZE)
X      {
X        FLUSH(w);
X        w = 0;
X      }
X    }
X    else                        /* it's an EOB or a length */
X    {
X      /* exit if end of block */
X      if (e == 15)
X        break;
X
X      /* get length of block to copy */
X      NEEDBITS(e)
X      n = t->v.n + ((unsigned)b & mask[e]);
X      DUMPBITS(e);
X
X      /* decode distance of block to copy */
X      NEEDBITS((unsigned)bd)
X      if ((e = (t = td + ((unsigned)b & md))->e) > 16)
X        do {
X          if (e == 99)
X            return 1;
X          DUMPBITS(t->b)
X          e -= 16;
X          NEEDBITS(e)
X        } while ((e = (t = t->v.t + ((unsigned)b & mask[e]))->e) > 16);
X      DUMPBITS(t->b)
X      NEEDBITS(e)
X      d = w - t->v.n - ((unsigned)b & mask[e]);
X      DUMPBITS(e)
X
X      /* do the copy */
X      do {
X        n -= (e = (e = WSIZE - ((d &= WSIZE-1) > w ? d : w)) > n ? n : e);
X#ifndef NOMEMCPY
X        if (w - d >= e)         /* (this test assumes unsigned comparison) */
X        {
X          memcpy(slide + w, slide + d, e);
X          w += e;
X          d += e;
X        }
X        else                      /* do it slow to avoid memcpy() overlap */
X#endif /* !NOMEMCPY */
X          do {
X            slide[w++] = slide[d++];
X          } while (--e);
X        if (w == WSIZE)
X        {
X          FLUSH(w);
X          w = 0;
X        }
X      } while (n);
X    }
X  }
X
X
X  /* restore the globals from the locals */
X  wp = w;                       /* restore global window pointer */
X  bb = b;                       /* restore global bit buffer */
X  bk = k;
X
X
X  /* done */
X  return 0;
X}
X
X#endif /* ASM_INFLATECODES */
X
X
X
Xint inflate_stored()
X/* "decompress" an inflated type 0 (stored) block. */
X{
X  unsigned n;           /* number of bytes in block */
X  unsigned w;           /* current window position */
X  register ulg b;       /* bit buffer */
X  register unsigned k;  /* number of bits in bit buffer */
X
X
X  /* make local copies of globals */
X  Trace((stderr, "\nstored block"));
X  b = bb;                       /* initialize bit buffer */
X  k = bk;
X  w = wp;                       /* initialize window position */
X
X
X  /* go to byte boundary */
X  n = k & 7;
X  DUMPBITS(n);
X
X
X  /* get the length and its complement */
X  NEEDBITS(16)
X  n = ((unsigned)b & 0xffff);
X  DUMPBITS(16)
X  NEEDBITS(16)
X  if (n != (unsigned)((~b) & 0xffff))
X    return 1;                   /* error in compressed data */
X  DUMPBITS(16)
X
X
X  /* read and output the compressed data */
X  while (n--)
X  {
X    NEEDBITS(8)
X    slide[w++] = (uch)b;
X    if (w == WSIZE)
X    {
X      FLUSH(w);
X      w = 0;
X    }
X    DUMPBITS(8)
X  }
X
X
X  /* restore the globals from the locals */
X  wp = w;                       /* restore global window pointer */
X  bb = b;                       /* restore global bit buffer */
X  bk = k;
X  return 0;
X}
X
X
X/* Globals for literal tables (built once) */
Xstruct huft *fixed_tl = (struct huft *)NULL;
Xstruct huft *fixed_td;
Xint fixed_bl, fixed_bd;
X
Xint inflate_fixed()
X/* decompress an inflated type 1 (fixed Huffman codes) block.  We should
X   either replace this with a custom decoder, or at least precompute the
X   Huffman tables. */
X{
X  /* if first time, set up tables for fixed blocks */
X  Trace((stderr, "\nliteral block"));
X  if (fixed_tl == (struct huft *)NULL)
X  {
X    int i;                /* temporary variable */
X    static unsigned l[288]; /* length list for huft_build */
X
X    /* literal table */
X    for (i = 0; i < 144; i++)
X      l[i] = 8;
X    for (; i < 256; i++)
X      l[i] = 9;
X    for (; i < 280; i++)
X      l[i] = 7;
X    for (; i < 288; i++)          /* make a complete, but wrong code set */
X      l[i] = 8;
X    fixed_bl = 7;
X    if ((i = huft_build(l, 288, 257, cplens, cplext,
X                        &fixed_tl, &fixed_bl)) != 0)
X    {
X      fixed_tl = (struct huft *)NULL;
X      return i;
X    }
X
X    /* distance table */
X    for (i = 0; i < 30; i++)      /* make an incomplete code set */
X      l[i] = 5;
X    fixed_bd = 5;
X    if ((i = huft_build(l, 30, 0, cpdist, cpdext, &fixed_td, &fixed_bd)) > 1)
X    {
X      huft_free(fixed_tl);
X      fixed_tl = (struct huft *)NULL;
X      return i;
X    }
X  }
X
X
X  /* decompress until an end-of-block code */
X  return inflate_codes(fixed_tl, fixed_td, fixed_bl, fixed_bd) != 0;
X}
X
X
X
Xint inflate_dynamic()
X/* decompress an inflated type 2 (dynamic Huffman codes) block. */
X{
X  int i;                /* temporary variables */
X  unsigned j;
X  unsigned l;           /* last length */
X  unsigned m;           /* mask for bit lengths table */
X  unsigned n;           /* number of lengths to get */
X  struct huft *tl;      /* literal/length code table */
X  struct huft *td;      /* distance code table */
X  int bl;               /* lookup bits for tl */
X  int bd;               /* lookup bits for td */
X  unsigned nb;          /* number of bit length codes */
X  unsigned nl;          /* number of literal/length codes */
X  unsigned nd;          /* number of distance codes */
X#ifdef PKZIP_BUG_WORKAROUND
X  static unsigned ll[288+32]; /* literal/length and distance code lengths */
X#else
X  static unsigned ll[286+30]; /* literal/length and distance code lengths */
X#endif
X  register ulg b;       /* bit buffer */
X  register unsigned k;  /* number of bits in bit buffer */
X
X
X  /* make local bit buffer */
X  Trace((stderr, "\ndynamic block"));
X  b = bb;
X  k = bk;
X
X
X  /* read in table lengths */
X  NEEDBITS(5)
X  nl = 257 + ((unsigned)b & 0x1f);      /* number of literal/length codes */
X  DUMPBITS(5)
X  NEEDBITS(5)
X  nd = 1 + ((unsigned)b & 0x1f);        /* number of distance codes */
X  DUMPBITS(5)
X  NEEDBITS(4)
X  nb = 4 + ((unsigned)b & 0xf);         /* number of bit length codes */
X  DUMPBITS(4)
X#ifdef PKZIP_BUG_WORKAROUND
X  if (nl > 288 || nd > 32)
X#else
X  if (nl > 286 || nd > 30)
X#endif
X    return 1;                   /* bad lengths */
X
X
X  /* read in bit-length-code lengths */
X  for (j = 0; j < nb; j++)
X  {
X    NEEDBITS(3)
X    ll[border[j]] = (unsigned)b & 7;
X    DUMPBITS(3)
X  }
X  for (; j < 19; j++)
X    ll[border[j]] = 0;
X
X
X  /* build decoding table for trees--single level, 7 bit lookup */
X  bl = 7;
X  if ((i = huft_build(ll, 19, 19, NULL, NULL, &tl, &bl)) != 0)
X  {
X    if (i == 1)
X      huft_free(tl);
X    return i;                   /* incomplete code set */
X  }
X
X
X  /* read in literal and distance code lengths */
X  n = nl + nd;
X  m = mask[bl];
X  i = l = 0;
X  while ((unsigned)i < n)
X  {
X    NEEDBITS((unsigned)bl)
X    j = (td = tl + ((unsigned)b & m))->b;
X    DUMPBITS(j)
X    j = td->v.n;
X    if (j < 16)                 /* length of code in bits (0..15) */
X      ll[i++] = l = j;          /* save last length in l */
X    else if (j == 16)           /* repeat last length 3 to 6 times */
X    {
X      NEEDBITS(2)
X      j = 3 + ((unsigned)b & 3);
X      DUMPBITS(2)
X      if ((unsigned)i + j > n)
X        return 1;
X      while (j--)
X        ll[i++] = l;
X    }
X    else if (j == 17)           /* 3 to 10 zero length codes */
X    {
X      NEEDBITS(3)
X      j = 3 + ((unsigned)b & 7);
X      DUMPBITS(3)
X      if ((unsigned)i + j > n)
X        return 1;
X      while (j--)
X        ll[i++] = 0;
X      l = 0;
X    }
X    else                        /* j == 18: 11 to 138 zero length codes */
X    {
X      NEEDBITS(7)
X      j = 11 + ((unsigned)b & 0x7f);
X      DUMPBITS(7)
X      if ((unsigned)i + j > n)
X        return 1;
X      while (j--)
X        ll[i++] = 0;
X      l = 0;
X    }
X  }
X
X
X  /* free decoding table for trees */
X  huft_free(tl);
X
X
X  /* restore the global bit buffer */
X  bb = b;
X  bk = k;
X
X
X  /* build the decoding tables for literal/length and distance codes */
X  bl = lbits;
X  if ((i = huft_build(ll, nl, 257, cplens, cplext, &tl, &bl)) != 0)
X  {
X    if (i == 1 && !qflag) {
X      FPRINTF(stderr, "(incomplete l-tree)  ");
X      huft_free(tl);
X    }
X    return i;                   /* incomplete code set */
X  }
X  bd = dbits;
X  if ((i = huft_build(ll + nl, nd, 0, cpdist, cpdext, &td, &bd)) != 0)
X  {
X    if (i == 1 && !qflag) {
X      FPRINTF(stderr, "(incomplete d-tree)  ");
X#ifdef PKZIP_BUG_WORKAROUND
X      i = 0;
X    }
X#else
X      huft_free(td);
X    }
X    huft_free(tl);
X    return i;                   /* incomplete code set */
X#endif
X  }
X
X
X  /* decompress until an end-of-block code */
X  if (inflate_codes(tl, td, bl, bd))
X    return 1;
X
X
X  /* free the decoding tables, return */
X  huft_free(tl);
X  huft_free(td);
X  return 0;
X}
X
X
X
Xint inflate_block(e)
Xint *e;                 /* last block flag */
X/* decompress an inflated block */
X{
X  unsigned t;           /* block type */
X  register ulg b;       /* bit buffer */
X  register unsigned k;  /* number of bits in bit buffer */
X
X
X  /* make local bit buffer */
X  b = bb;
X  k = bk;
X
X
X  /* read in last block bit */
X  NEEDBITS(1)
X  *e = (int)b & 1;
X  DUMPBITS(1)
X
X
X  /* read in block type */
X  NEEDBITS(2)
X  t = (unsigned)b & 3;
X  DUMPBITS(2)
X
X
X  /* restore the global bit buffer */
X  bb = b;
X  bk = k;
X
X
X  /* inflate that block type */
X  if (t == 2)
X    return inflate_dynamic();
X  if (t == 0)
X    return inflate_stored();
X  if (t == 1)
X    return inflate_fixed();
X
X
X  /* bad block type */
X  return 2;
X}
X
X
X
Xint inflate()
X/* decompress an inflated entry */
X{
X  int e;                /* last block flag */
X  int r;                /* result code */
X  unsigned h;           /* maximum struct huft's malloc'ed */
X
X
X  /* initialize window, bit buffer */
X  wp = 0;
X  bk = 0;
X  bb = 0;
X
X
X  /* decompress until the last block */
X  h = 0;
X  do {
X    hufts = 0;
X    if ((r = inflate_block(&e)) != 0)
X      return r;
X    if (hufts > h)
X      h = hufts;
X  } while (!e);
X
X
X  /* flush out slide */
X  FLUSH(wp);
X
X
X  /* return success */
X  Trace((stderr, "\n%u bytes in Huffman tables (%d/entry)\n",
X         h * sizeof(struct huft), sizeof(struct huft)));
X  return 0;
X}
X
X
X
Xint inflate_free()
X{
X  if (fixed_tl != (struct huft *)NULL)
X  {
X    huft_free(fixed_td);
X    huft_free(fixed_tl);
X    fixed_td = fixed_tl = (struct huft *)NULL;
X  }
X  return 0;
X}
END_OF_FILE
  if test 38275 -ne `wc -c <'unzip-5.12/inflate.c'`; then
    echo shar: \"'unzip-5.12/inflate.c'\" unpacked with wrong size!
  fi
  # end of 'unzip-5.12/inflate.c'
fi
echo shar: End of archive 9 \(of 20\).
cp /dev/null ark9isdone
MISSING=""
for I in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ; do
    if test ! -f ark${I}isdone ; then
    MISSING="${MISSING} ${I}"
    fi
done
if test "${MISSING}" = "" ; then
    echo You have unpacked all 20 archives.
    rm -f ark[1-9]isdone ark[1-9][0-9]isdone
else
    echo You still must unpack the following archives:
    echo "        " ${MISSING}
fi
exit 0
exit 0 # Just in case...