1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/ossrv/compressionlibs/ziplib/test/oldezlib/EZLib/infutil.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,87 @@
     1.4 +/* inflate_util.c -- data and routines common to blocks and codes
     1.5 + * Copyright (C) 1995-1998 Mark Adler
     1.6 + * For conditions of distribution and use, see copyright notice in zlib.h 
     1.7 + */
     1.8 +
     1.9 +#include "zutil.h"
    1.10 +#include "infblock.h"
    1.11 +#include "inftrees.h"
    1.12 +#include "infcodes.h"
    1.13 +#include "infutil.h"
    1.14 +
    1.15 +struct inflate_codes_state {int dummy;}; /* for buggy compilers */
    1.16 +
    1.17 +/* And'ing with mask[n] masks the lower n bits */
    1.18 +const uInt inflate_mask[17] = {
    1.19 +    0x0000,
    1.20 +    0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,
    1.21 +    0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff
    1.22 +};
    1.23 +
    1.24 +
    1.25 +/* copy as much as possible from the sliding window to the output area */
    1.26 +int inflate_flush(
    1.27 +inflate_blocks_statef *s,
    1.28 +z_streamp z,
    1.29 +int r)
    1.30 +{
    1.31 +  uInt n;
    1.32 +  Bytef *p;
    1.33 +  Bytef *q;
    1.34 +
    1.35 +  /* local copies of source and destination pointers */
    1.36 +  p = z->next_out;
    1.37 +  q = s->read;
    1.38 +
    1.39 +  /* compute number of bytes to copy as far as end of window */
    1.40 +  n = (uInt)((q <= s->write ? s->write : s->end) - q);
    1.41 +  if (n > z->avail_out) n = z->avail_out;
    1.42 +  if (n && r == Z_BUF_ERROR) r = Z_OK;
    1.43 +
    1.44 +  /* update counters */
    1.45 +  z->avail_out -= n;
    1.46 +  z->total_out += n;
    1.47 +
    1.48 +  /* update check information */
    1.49 +  if (s->checkfn != Z_NULL)
    1.50 +    z->adler = s->check = (*s->checkfn)(s->check, q, n);
    1.51 +
    1.52 +  /* copy as far as end of window */
    1.53 +  zmemcpy(p, q, n);
    1.54 +  p += n;
    1.55 +  q += n;
    1.56 +
    1.57 +  /* see if more to copy at beginning of window */
    1.58 +  if (q == s->end)
    1.59 +  {
    1.60 +    /* wrap pointers */
    1.61 +    q = s->window;
    1.62 +    if (s->write == s->end)
    1.63 +      s->write = s->window;
    1.64 +
    1.65 +    /* compute bytes to copy */
    1.66 +    n = (uInt)(s->write - q);
    1.67 +    if (n > z->avail_out) n = z->avail_out;
    1.68 +    if (n && r == Z_BUF_ERROR) r = Z_OK;
    1.69 +
    1.70 +    /* update counters */
    1.71 +    z->avail_out -= n;
    1.72 +    z->total_out += n;
    1.73 +
    1.74 +    /* update check information */
    1.75 +    if (s->checkfn != Z_NULL)
    1.76 +      z->adler = s->check = (*s->checkfn)(s->check, q, n);
    1.77 +
    1.78 +    /* copy */
    1.79 +    zmemcpy(p, q, n);
    1.80 +    p += n;
    1.81 +    q += n;
    1.82 +  }
    1.83 +
    1.84 +  /* update pointers */
    1.85 +  z->next_out = p;
    1.86 +  s->read = q;
    1.87 +
    1.88 +  /* done */
    1.89 +  return r;
    1.90 +}