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zlib 0.92

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This commit is contained in:
Mark Adler
2011-09-09 23:08:07 -07:00
parent 1c71d8b13b
commit bdde4e09d2
25 changed files with 884 additions and 910 deletions
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264
infblock.c
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@@ -12,7 +12,7 @@
struct inflate_codes_state {int dummy;}; /* for buggy compilers */
/* Table for deflate from PKZIP's appnote.txt. */
local uInt border[] = { /* Order of the bit length code lengths */
local uInt border[] = { /* Order of the bit length code lengths */
16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
/*
@@ -111,13 +111,13 @@ struct inflate_blocks_state *s;
z_stream *z;
int r;
{
uInt t; /* temporary storage */
uLong b; /* bit buffer */
uInt k; /* bits in bit buffer */
Byte *p; /* input data pointer */
uInt n; /* bytes available there */
Byte *q; /* output window write pointer */
uInt m; /* bytes to end of window or read pointer */
uInt t; /* temporary storage */
uLong b; /* bit buffer */
uInt k; /* bits in bit buffer */
Byte *p; /* input data pointer */
uInt n; /* bytes available there */
Byte *q; /* output window write pointer */
uInt m; /* bytes to end of window or read pointer */
/* copy input/output information to locals (UPDATE macro restores) */
LOAD
@@ -131,44 +131,44 @@ int r;
s->last = t & 1;
switch (t >> 1)
{
case 0: /* stored */
Trace((stderr, "inflate: stored block%s\n",
s->last ? " (last)" : ""));
DUMPBITS(3)
t = k & 7; /* go to byte boundary */
DUMPBITS(t)
s->mode = LENS; /* get length of stored block */
break;
case 1: /* fixed */
Trace((stderr, "inflate: fixed codes block%s\n",
s->last ? " (last)" : ""));
{
uInt bl, bd;
inflate_huft *tl, *td;
case 0: /* stored */
Trace((stderr, "inflate: stored block%s\n",
s->last ? " (last)" : ""));
DUMPBITS(3)
t = k & 7; /* go to byte boundary */
DUMPBITS(t)
s->mode = LENS; /* get length of stored block */
break;
case 1: /* fixed */
Trace((stderr, "inflate: fixed codes block%s\n",
s->last ? " (last)" : ""));
{
uInt bl, bd;
inflate_huft *tl, *td;
inflate_trees_fixed(&bl, &bd, &tl, &td);
s->sub.codes = inflate_codes_new(bl, bd, tl, td, z);
if (s->sub.codes == Z_NULL)
{
r = Z_MEM_ERROR;
LEAVE
}
}
DUMPBITS(3)
s->mode = CODES;
break;
case 2: /* dynamic */
Trace((stderr, "inflate: dynamic codes block%s\n",
s->last ? " (last)" : ""));
DUMPBITS(3)
s->mode = TABLE;
break;
case 3: /* illegal */
DUMPBITS(3)
s->mode = BAD;
z->msg = "invalid block type";
r = Z_DATA_ERROR;
LEAVE
inflate_trees_fixed(&bl, &bd, &tl, &td);
s->sub.codes = inflate_codes_new(bl, bd, tl, td, z);
if (s->sub.codes == Z_NULL)
{
r = Z_MEM_ERROR;
LEAVE
}
}
DUMPBITS(3)
s->mode = CODES;
break;
case 2: /* dynamic */
Trace((stderr, "inflate: dynamic codes block%s\n",
s->last ? " (last)" : ""));
DUMPBITS(3)
s->mode = TABLE;
break;
case 3: /* illegal */
DUMPBITS(3)
s->mode = BAD;
z->msg = "invalid block type";
r = Z_DATA_ERROR;
LEAVE
}
break;
case LENS:
@@ -176,24 +176,30 @@ int r;
if ((~b) >> 16 != (b & 0xffff))
{
s->mode = BAD;
z->msg = "invalid stored block lengths";
r = Z_DATA_ERROR;
LEAVE
z->msg = "invalid stored block lengths";
r = Z_DATA_ERROR;
LEAVE
}
k = 0; /* dump bits */
s->sub.left = (uInt)b & 0xffff;
k = b = 0; /* dump bits */
Tracev((stderr, "inflate: stored length %u\n", s->sub.left));
s->mode = s->sub.left ? STORED : TYPE;
break;
case STORED:
do {
NEEDBYTE
NEEDOUT
OUTBYTE(NEXTBYTE)
} while (--s->sub.left);
if (n == 0)
LEAVE
NEEDOUT
t = s->sub.left;
if (t > n) t = n;
if (t > m) t = m;
zmemcpy(q, p, t);
p += t; n -= t;
q += t; m -= t;
if ((s->sub.left -= t) != 0)
break;
Tracev((stderr, "inflate: stored end, %lu total out\n",
z->total_out + (q >= s->read ? q - s->read :
(s->end - s->read) + (q - s->window))));
z->total_out + (q >= s->read ? q - s->read :
(s->end - s->read) + (q - s->window))));
s->mode = s->last ? DRY : TYPE;
break;
case TABLE:
@@ -204,8 +210,8 @@ int r;
{
s->mode = BAD;
z->msg = "too many length or distance symbols";
r = Z_DATA_ERROR;
LEAVE
r = Z_DATA_ERROR;
LEAVE
}
#endif
t = 258 + (t & 0x1f) + ((t >> 5) & 0x1f);
@@ -214,7 +220,7 @@ int r;
if ((s->sub.trees.blens = (uInt*)ZALLOC(z, t, sizeof(uInt))) == Z_NULL)
{
r = Z_MEM_ERROR;
LEAVE
LEAVE
}
DUMPBITS(14)
s->sub.trees.index = 0;
@@ -224,118 +230,118 @@ int r;
while (s->sub.trees.index < 4 + (s->sub.trees.table >> 10))
{
NEEDBITS(3)
s->sub.trees.blens[border[s->sub.trees.index++]] = (uInt)b & 7;
DUMPBITS(3)
s->sub.trees.blens[border[s->sub.trees.index++]] = (uInt)b & 7;
DUMPBITS(3)
}
while (s->sub.trees.index < 19)
s->sub.trees.blens[border[s->sub.trees.index++]] = 0;
s->sub.trees.bb = 7;
t = inflate_trees_bits(s->sub.trees.blens, &s->sub.trees.bb,
&s->sub.trees.tb, z);
&s->sub.trees.tb, z);
if (t != Z_OK)
{
r = t;
if (r == Z_DATA_ERROR)
s->mode = BAD;
LEAVE
if (r == Z_DATA_ERROR)
s->mode = BAD;
LEAVE
}
s->sub.trees.index = 0;
Tracev((stderr, "inflate: bits tree ok\n"));
s->mode = DTREE;
case DTREE:
while (t = s->sub.trees.table,
s->sub.trees.index < 258 + (t & 0x1f) + ((t >> 5) & 0x1f))
s->sub.trees.index < 258 + (t & 0x1f) + ((t >> 5) & 0x1f))
{
inflate_huft *h;
uInt i, j, c;
uInt i, j, c;
t = s->sub.trees.bb;
NEEDBITS(t)
h = s->sub.trees.tb + ((uInt)b & inflate_mask[t]);
t = h->word.what.Bits;
c = h->more.Base;
if (c < 16)
{
DUMPBITS(t)
s->sub.trees.blens[s->sub.trees.index++] = c;
}
else /* c == 16..18 */
{
i = c == 18 ? 7 : c - 14;
j = c == 18 ? 11 : 3;
NEEDBITS(t + i)
DUMPBITS(t)
j += (uInt)b & inflate_mask[i];
DUMPBITS(i)
i = s->sub.trees.index;
t = s->sub.trees.table;
if (i + j > 258 + (t & 0x1f) + ((t >> 5) & 0x1f) ||
(c == 16 && i < 1))
{
s->mode = BAD;
z->msg = "invalid bit length repeat";
r = Z_DATA_ERROR;
LEAVE
}
c = c == 16 ? s->sub.trees.blens[i - 1] : 0;
do {
s->sub.trees.blens[i++] = c;
} while (--j);
s->sub.trees.index = i;
}
h = s->sub.trees.tb + ((uInt)b & inflate_mask[t]);
t = h->word.what.Bits;
c = h->more.Base;
if (c < 16)
{
DUMPBITS(t)
s->sub.trees.blens[s->sub.trees.index++] = c;
}
else /* c == 16..18 */
{
i = c == 18 ? 7 : c - 14;
j = c == 18 ? 11 : 3;
NEEDBITS(t + i)
DUMPBITS(t)
j += (uInt)b & inflate_mask[i];
DUMPBITS(i)
i = s->sub.trees.index;
t = s->sub.trees.table;
if (i + j > 258 + (t & 0x1f) + ((t >> 5) & 0x1f) ||
(c == 16 && i < 1))
{
s->mode = BAD;
z->msg = "invalid bit length repeat";
r = Z_DATA_ERROR;
LEAVE
}
c = c == 16 ? s->sub.trees.blens[i - 1] : 0;
do {
s->sub.trees.blens[i++] = c;
} while (--j);
s->sub.trees.index = i;
}
}
inflate_trees_free(s->sub.trees.tb, z);
s->sub.trees.tb = Z_NULL;
{
uInt bl, bd;
inflate_huft *tl, *td;
struct inflate_codes_state *c;
uInt bl, bd;
inflate_huft *tl, *td;
struct inflate_codes_state *c;
bl = 9;
bd = 6;
t = s->sub.trees.table;
t = inflate_trees_dynamic(257 + (t & 0x1f), 1 + ((t >> 5) & 0x1f),
s->sub.trees.blens, &bl, &bd, &tl, &td, z);
if (t != Z_OK)
{
if (t == (uInt)Z_DATA_ERROR)
s->mode = BAD;
r = t;
LEAVE
}
bl = 9;
bd = 6;
t = s->sub.trees.table;
t = inflate_trees_dynamic(257 + (t & 0x1f), 1 + ((t >> 5) & 0x1f),
s->sub.trees.blens, &bl, &bd, &tl, &td, z);
if (t != Z_OK)
{
if (t == (uInt)Z_DATA_ERROR)
s->mode = BAD;
r = t;
LEAVE
}
Tracev((stderr, "inflate: trees ok\n"));
if ((c = inflate_codes_new(bl, bd, tl, td, z)) == Z_NULL)
{
inflate_trees_free(td, z);
inflate_trees_free(tl, z);
r = Z_MEM_ERROR;
LEAVE
}
ZFREE(z, s->sub.trees.blens);
s->sub.codes = c;
if ((c = inflate_codes_new(bl, bd, tl, td, z)) == Z_NULL)
{
inflate_trees_free(td, z);
inflate_trees_free(tl, z);
r = Z_MEM_ERROR;
LEAVE
}
ZFREE(z, s->sub.trees.blens);
s->sub.codes = c;
}
s->mode = CODES;
case CODES:
UPDATE
if ((r = inflate_codes(s, z, r)) != Z_STREAM_END)
return inflate_flush(s, z, r);
return inflate_flush(s, z, r);
r = Z_OK;
inflate_codes_free(s->sub.codes, z);
LOAD
Tracev((stderr, "inflate: codes end, %lu total out\n",
z->total_out + (q >= s->read ? q - s->read :
(s->end - s->read) + (q - s->window))));
z->total_out + (q >= s->read ? q - s->read :
(s->end - s->read) + (q - s->window))));
if (!s->last)
{
s->mode = TYPE;
break;
break;
}
if (k > 7) /* return unused byte, if any */
{
Assert(k < 16, "inflate_codes grabbed too many bytes")
k -= 8;
n++;
p--; /* can always return one */
n++;
p--; /* can always return one */
}
s->mode = DRY;
case DRY: