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- Updated ZDBSP to zlib 1.2.7.

Browse source 
SVN r3984 (trunk)
This commit is contained in:
Randy Heit 2012-12-08 02:45:23 +00:00
parent 8e785ba3b1
commit b53fe459f9
13 changed files with 1779 additions and 946 deletions
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1
zlib/CMakeLists.txt
View file

@ -13,6 +13,7 @@ add_library( z
zutil.c zutil.c
crc32.h crc32.h
deflate.h deflate.h
gzguts.h
trees.h trees.h
zconf.h zconf.h
zlib.h zlib.h

102
zlib/adler32.c
View file

@ -1,14 +1,17 @@
/* adler32.c -- compute the Adler-32 checksum of a data stream /* adler32.c -- compute the Adler-32 checksum of a data stream
* Copyright (C) 1995-2004 Mark Adler * Copyright (C) 1995-2011 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
/* @(#) $Id$ */ /* @(#) $Id$ */
#define ZLIB_INTERNAL #include "zutil.h"
#include "zlib.h"
#define BASE 65521UL /* largest prime smaller than 65536 */ #define local static
local uLong adler32_combine_ OF((uLong adler1, uLong adler2, z_off64_t len2));
#define BASE 65521 /* largest prime smaller than 65536 */
#define NMAX 5552 #define NMAX 5552
/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */ /* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
@ -18,39 +21,44 @@
#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4); #define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
#define DO16(buf) DO8(buf,0); DO8(buf,8); #define DO16(buf) DO8(buf,0); DO8(buf,8);
/* use NO_DIVIDE if your processor does not do division in hardware */ /* use NO_DIVIDE if your processor does not do division in hardware --
try it both ways to see which is faster */
#ifdef NO_DIVIDE #ifdef NO_DIVIDE
# define MOD(a) \ /* note that this assumes BASE is 65521, where 65536 % 65521 == 15
(thank you to John Reiser for pointing this out) */
# define CHOP(a) \
do { \ do { \
if (a >= (BASE << 16)) a -= (BASE << 16); \ unsigned long tmp = a >> 16; \
if (a >= (BASE << 15)) a -= (BASE << 15); \ a &= 0xffffUL; \
if (a >= (BASE << 14)) a -= (BASE << 14); \ a += (tmp << 4) - tmp; \
if (a >= (BASE << 13)) a -= (BASE << 13); \ } while (0)
if (a >= (BASE << 12)) a -= (BASE << 12); \ # define MOD28(a) \
if (a >= (BASE << 11)) a -= (BASE << 11); \ do { \
if (a >= (BASE << 10)) a -= (BASE << 10); \ CHOP(a); \
if (a >= (BASE << 9)) a -= (BASE << 9); \
if (a >= (BASE << 8)) a -= (BASE << 8); \
if (a >= (BASE << 7)) a -= (BASE << 7); \
if (a >= (BASE << 6)) a -= (BASE << 6); \
if (a >= (BASE << 5)) a -= (BASE << 5); \
if (a >= (BASE << 4)) a -= (BASE << 4); \
if (a >= (BASE << 3)) a -= (BASE << 3); \
if (a >= (BASE << 2)) a -= (BASE << 2); \
if (a >= (BASE << 1)) a -= (BASE << 1); \
if (a >= BASE) a -= BASE; \ if (a >= BASE) a -= BASE; \
} while (0) } while (0)
# define MOD4(a) \ # define MOD(a) \
do { \ do { \
if (a >= (BASE << 4)) a -= (BASE << 4); \ CHOP(a); \
if (a >= (BASE << 3)) a -= (BASE << 3); \ MOD28(a); \
if (a >= (BASE << 2)) a -= (BASE << 2); \ } while (0)
if (a >= (BASE << 1)) a -= (BASE << 1); \ # define MOD63(a) \
do { /* this assumes a is not negative */ \
z_off64_t tmp = a >> 32; \
a &= 0xffffffffL; \
a += (tmp << 8) - (tmp << 5) + tmp; \
tmp = a >> 16; \
a &= 0xffffL; \
a += (tmp << 4) - tmp; \
tmp = a >> 16; \
a &= 0xffffL; \
a += (tmp << 4) - tmp; \
if (a >= BASE) a -= BASE; \ if (a >= BASE) a -= BASE; \
} while (0) } while (0)
#else #else
# define MOD(a) a %= BASE # define MOD(a) a %= BASE
# define MOD4(a) a %= BASE # define MOD28(a) a %= BASE
# define MOD63(a) a %= BASE
#endif #endif
/* ========================================================================= */ /* ========================================================================= */
@ -89,7 +97,7 @@ uLong ZEXPORT adler32(adler, buf, len)
} }
if (adler >= BASE) if (adler >= BASE)
adler -= BASE; adler -= BASE;
MOD4(sum2); /* only added so many BASE's */ MOD28(sum2); /* only added so many BASE's */
return adler | (sum2 << 16); return adler | (sum2 << 16);
} }
@ -125,25 +133,47 @@ uLong ZEXPORT adler32(adler, buf, len)
} }
/* ========================================================================= */ /* ========================================================================= */
uLong ZEXPORT adler32_combine(adler1, adler2, len2) local uLong adler32_combine_(adler1, adler2, len2)
uLong adler1; uLong adler1;
uLong adler2; uLong adler2;
z_off_t len2; z_off64_t len2;
{ {
unsigned long sum1; unsigned long sum1;
unsigned long sum2; unsigned long sum2;
unsigned rem; unsigned rem;
/* for negative len, return invalid adler32 as a clue for debugging */
if (len2 < 0)
return 0xffffffffUL;
/* the derivation of this formula is left as an exercise for the reader */ /* the derivation of this formula is left as an exercise for the reader */
rem = (unsigned)(len2 % BASE); MOD63(len2); /* assumes len2 >= 0 */
rem = (unsigned)len2;
sum1 = adler1 & 0xffff; sum1 = adler1 & 0xffff;
sum2 = rem * sum1; sum2 = rem * sum1;
MOD(sum2); MOD(sum2);
sum1 += (adler2 & 0xffff) + BASE - 1; sum1 += (adler2 & 0xffff) + BASE - 1;
sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem; sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem;
if (sum1 > BASE) sum1 -= BASE; if (sum1 >= BASE) sum1 -= BASE;
if (sum1 > BASE) sum1 -= BASE; if (sum1 >= BASE) sum1 -= BASE;
if (sum2 > (BASE << 1)) sum2 -= (BASE << 1); if (sum2 >= (BASE << 1)) sum2 -= (BASE << 1);
if (sum2 > BASE) sum2 -= BASE; if (sum2 >= BASE) sum2 -= BASE;
return sum1 | (sum2 << 16); return sum1 | (sum2 << 16);
} }
/* ========================================================================= */
uLong ZEXPORT adler32_combine(adler1, adler2, len2)
uLong adler1;
uLong adler2;
z_off_t len2;
{
return adler32_combine_(adler1, adler2, len2);
}
uLong ZEXPORT adler32_combine64(adler1, adler2, len2)
uLong adler1;
uLong adler2;
z_off64_t len2;
{
return adler32_combine_(adler1, adler2, len2);
}

5
zlib/compress.c
View file

@ -1,5 +1,5 @@
/* compress.c -- compress a memory buffer /* compress.c -- compress a memory buffer
* Copyright (C) 1995-2003 Jean-loup Gailly. * Copyright (C) 1995-2005 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -75,5 +75,6 @@ int ZEXPORT compress (dest, destLen, source, sourceLen)
uLong ZEXPORT compressBound (sourceLen) uLong ZEXPORT compressBound (sourceLen)
uLong sourceLen; uLong sourceLen;
{ {
return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + 11; return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) +
(sourceLen >> 25) + 13;
} }

112
zlib/crc32.c
View file

@ -1,5 +1,5 @@
/* crc32.c -- compute the CRC-32 of a data stream /* crc32.c -- compute the CRC-32 of a data stream
* Copyright (C) 1995-2005 Mark Adler * Copyright (C) 1995-2006, 2010, 2011, 2012 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
* *
* Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster * Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
@ -17,6 +17,8 @@
of the crc tables. Therefore, if you #define DYNAMIC_CRC_TABLE, you should of the crc tables. Therefore, if you #define DYNAMIC_CRC_TABLE, you should
first call get_crc_table() to initialize the tables before allowing more than first call get_crc_table() to initialize the tables before allowing more than
one thread to use crc32(). one thread to use crc32().
DYNAMIC_CRC_TABLE and MAKECRCH can be #defined to write out crc32.h.
*/ */
#ifdef MAKECRCH #ifdef MAKECRCH
@ -30,31 +32,11 @@
#define local static #define local static
/* Find a four-byte integer type for crc32_little() and crc32_big(). */
#ifndef NOBYFOUR
# ifdef STDC /* need ANSI C limits.h to determine sizes */
# include <limits.h>
# define BYFOUR
# if (UINT_MAX == 0xffffffffUL)
typedef unsigned int u4;
# else
# if (ULONG_MAX == 0xffffffffUL)
typedef unsigned long u4;
# else
# if (USHRT_MAX == 0xffffffffUL)
typedef unsigned short u4;
# else
# undef BYFOUR /* can't find a four-byte integer type! */
# endif
# endif
# endif
# endif /* STDC */
#endif /* !NOBYFOUR */
/* Definitions for doing the crc four data bytes at a time. */ /* Definitions for doing the crc four data bytes at a time. */
#if !defined(NOBYFOUR) && defined(Z_U4)
# define BYFOUR
#endif
#ifdef BYFOUR #ifdef BYFOUR
# define REV(w) (((w)>>24)+(((w)>>8)&0xff00)+ \
(((w)&0xff00)<<8)+(((w)&0xff)<<24))
local unsigned long crc32_little OF((unsigned long, local unsigned long crc32_little OF((unsigned long,
const unsigned char FAR *, unsigned)); const unsigned char FAR *, unsigned));
local unsigned long crc32_big OF((unsigned long, local unsigned long crc32_big OF((unsigned long,
@ -68,14 +50,16 @@
local unsigned long gf2_matrix_times OF((unsigned long *mat, local unsigned long gf2_matrix_times OF((unsigned long *mat,
unsigned long vec)); unsigned long vec));
local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat)); local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat));
local uLong crc32_combine_ OF((uLong crc1, uLong crc2, z_off64_t len2));
#ifdef DYNAMIC_CRC_TABLE #ifdef DYNAMIC_CRC_TABLE
local volatile int crc_table_empty = 1; local volatile int crc_table_empty = 1;
local unsigned long FAR crc_table[TBLS][256]; local z_crc_t FAR crc_table[TBLS][256];
local void make_crc_table OF((void)); local void make_crc_table OF((void));
#ifdef MAKECRCH #ifdef MAKECRCH
local void write_table OF((FILE *, const unsigned long FAR *)); local void write_table OF((FILE *, const z_crc_t FAR *));
#endif /* MAKECRCH */ #endif /* MAKECRCH */
/* /*
Generate tables for a byte-wise 32-bit CRC calculation on the polynomial: Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
@ -105,9 +89,9 @@ local void make_crc_table OF((void));
*/ */
local void make_crc_table() local void make_crc_table()
{ {
unsigned long c; z_crc_t c;
int n, k; int n, k;
unsigned long poly; /* polynomial exclusive-or pattern */ z_crc_t poly; /* polynomial exclusive-or pattern */
/* terms of polynomial defining this crc (except x^32): */ /* terms of polynomial defining this crc (except x^32): */
static volatile int first = 1; /* flag to limit concurrent making */ static volatile int first = 1; /* flag to limit concurrent making */
static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26}; static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
@ -119,13 +103,13 @@ local void make_crc_table()
first = 0; first = 0;
/* make exclusive-or pattern from polynomial (0xedb88320UL) */ /* make exclusive-or pattern from polynomial (0xedb88320UL) */
poly = 0UL; poly = 0;
for (n = 0; n < sizeof(p)/sizeof(unsigned char); n++) for (n = 0; n < (int)(sizeof(p)/sizeof(unsigned char)); n++)
poly |= 1UL << (31 - p[n]); poly |= (z_crc_t)1 << (31 - p[n]);
/* generate a crc for every 8-bit value */ /* generate a crc for every 8-bit value */
for (n = 0; n < 256; n++) { for (n = 0; n < 256; n++) {
c = (unsigned long)n; c = (z_crc_t)n;
for (k = 0; k < 8; k++) for (k = 0; k < 8; k++)
c = c & 1 ? poly ^ (c >> 1) : c >> 1; c = c & 1 ? poly ^ (c >> 1) : c >> 1;
crc_table[0][n] = c; crc_table[0][n] = c;
@ -136,11 +120,11 @@ local void make_crc_table()
and then the byte reversal of those as well as the first table */ and then the byte reversal of those as well as the first table */
for (n = 0; n < 256; n++) { for (n = 0; n < 256; n++) {
c = crc_table[0][n]; c = crc_table[0][n];
crc_table[4][n] = REV(c); crc_table[4][n] = ZSWAP32(c);
for (k = 1; k < 4; k++) { for (k = 1; k < 4; k++) {
c = crc_table[0][c & 0xff] ^ (c >> 8); c = crc_table[0][c & 0xff] ^ (c >> 8);
crc_table[k][n] = c; crc_table[k][n] = c;
crc_table[k + 4][n] = REV(c); crc_table[k + 4][n] = ZSWAP32(c);
} }
} }
#endif /* BYFOUR */ #endif /* BYFOUR */
@ -162,7 +146,7 @@ local void make_crc_table()
if (out == NULL) return; if (out == NULL) return;
fprintf(out, "/* crc32.h -- tables for rapid CRC calculation\n"); fprintf(out, "/* crc32.h -- tables for rapid CRC calculation\n");
fprintf(out, " * Generated automatically by crc32.c\n */\n\n"); fprintf(out, " * Generated automatically by crc32.c\n */\n\n");
fprintf(out, "local const unsigned long FAR "); fprintf(out, "local const z_crc_t FAR ");
fprintf(out, "crc_table[TBLS][256] =\n{\n {\n"); fprintf(out, "crc_table[TBLS][256] =\n{\n {\n");
write_table(out, crc_table[0]); write_table(out, crc_table[0]);
# ifdef BYFOUR # ifdef BYFOUR
@ -182,12 +166,13 @@ local void make_crc_table()
#ifdef MAKECRCH #ifdef MAKECRCH
local void write_table(out, table) local void write_table(out, table)
FILE *out; FILE *out;
const unsigned long FAR *table; const z_crc_t FAR *table;
{ {
int n; int n;
for (n = 0; n < 256; n++) for (n = 0; n < 256; n++)
fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : " ", table[n], fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : " ",
(unsigned long)(table[n]),
n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", ")); n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", "));
} }
#endif /* MAKECRCH */ #endif /* MAKECRCH */
@ -202,13 +187,13 @@ local void write_table(out, table)
/* ========================================================================= /* =========================================================================
* This function can be used by asm versions of crc32() * This function can be used by asm versions of crc32()
*/ */
const unsigned long FAR * ZEXPORT get_crc_table() const z_crc_t FAR * ZEXPORT get_crc_table()
{ {
#ifdef DYNAMIC_CRC_TABLE #ifdef DYNAMIC_CRC_TABLE
if (crc_table_empty) if (crc_table_empty)
make_crc_table(); make_crc_table();
#endif /* DYNAMIC_CRC_TABLE */ #endif /* DYNAMIC_CRC_TABLE */
return (const unsigned long FAR *)crc_table; return (const z_crc_t FAR *)crc_table;
} }
/* ========================================================================= */ /* ========================================================================= */
@ -219,7 +204,7 @@ const unsigned long FAR * ZEXPORT get_crc_table()
unsigned long ZEXPORT crc32(crc, buf, len) unsigned long ZEXPORT crc32(crc, buf, len)
unsigned long crc; unsigned long crc;
const unsigned char FAR *buf; const unsigned char FAR *buf;
unsigned len; uInt len;
{ {
if (buf == Z_NULL) return 0UL; if (buf == Z_NULL) return 0UL;
@ -230,7 +215,7 @@ unsigned long ZEXPORT crc32(crc, buf, len)
#ifdef BYFOUR #ifdef BYFOUR
if (sizeof(void *) == sizeof(ptrdiff_t)) { if (sizeof(void *) == sizeof(ptrdiff_t)) {
u4 endian; z_crc_t endian;
endian = 1; endian = 1;
if (*((unsigned char *)(&endian))) if (*((unsigned char *)(&endian)))
@ -264,17 +249,17 @@ local unsigned long crc32_little(crc, buf, len)
const unsigned char FAR *buf; const unsigned char FAR *buf;
unsigned len; unsigned len;
{ {
register u4 c; register z_crc_t c;
register const u4 FAR *buf4; register const z_crc_t FAR *buf4;
c = (u4)crc; c = (z_crc_t)crc;
c = ~c; c = ~c;
while (len && ((ptrdiff_t)buf & 3)) { while (len && ((ptrdiff_t)buf & 3)) {
c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8); c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
len--; len--;
} }
buf4 = (const u4 FAR *)(const void FAR *)buf; buf4 = (const z_crc_t FAR *)(const void FAR *)buf;
while (len >= 32) { while (len >= 32) {
DOLIT32; DOLIT32;
len -= 32; len -= 32;
@ -304,17 +289,17 @@ local unsigned long crc32_big(crc, buf, len)
const unsigned char FAR *buf; const unsigned char FAR *buf;
unsigned len; unsigned len;
{ {
register u4 c; register z_crc_t c;
register const u4 FAR *buf4; register const z_crc_t FAR *buf4;
c = REV((u4)crc); c = ZSWAP32((z_crc_t)crc);
c = ~c; c = ~c;
while (len && ((ptrdiff_t)buf & 3)) { while (len && ((ptrdiff_t)buf & 3)) {
c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8); c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
len--; len--;
} }
buf4 = (const u4 FAR *)(const void FAR *)buf; buf4 = (const z_crc_t FAR *)(const void FAR *)buf;
buf4--; buf4--;
while (len >= 32) { while (len >= 32) {
DOBIG32; DOBIG32;
@ -331,7 +316,7 @@ local unsigned long crc32_big(crc, buf, len)
c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8); c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
} while (--len); } while (--len);
c = ~c; c = ~c;
return (unsigned long)(REV(c)); return (unsigned long)(ZSWAP32(c));
} }
#endif /* BYFOUR */ #endif /* BYFOUR */
@ -367,22 +352,22 @@ local void gf2_matrix_square(square, mat)
} }
/* ========================================================================= */ /* ========================================================================= */
uLong ZEXPORT crc32_combine(crc1, crc2, len2) local uLong crc32_combine_(crc1, crc2, len2)
uLong crc1; uLong crc1;
uLong crc2; uLong crc2;
z_off_t len2; z_off64_t len2;
{ {
int n; int n;
unsigned long row; unsigned long row;
unsigned long even[GF2_DIM]; /* even-power-of-two zeros operator */ unsigned long even[GF2_DIM]; /* even-power-of-two zeros operator */
unsigned long odd[GF2_DIM]; /* odd-power-of-two zeros operator */ unsigned long odd[GF2_DIM]; /* odd-power-of-two zeros operator */
/* degenerate case */ /* degenerate case (also disallow negative lengths) */
if (len2 == 0) if (len2 <= 0)
return crc1; return crc1;
/* put operator for one zero bit in odd */ /* put operator for one zero bit in odd */
odd[0] = 0xedb88320L; /* CRC-32 polynomial */ odd[0] = 0xedb88320UL; /* CRC-32 polynomial */
row = 1; row = 1;
for (n = 1; n < GF2_DIM; n++) { for (n = 1; n < GF2_DIM; n++) {
odd[n] = row; odd[n] = row;
@ -421,3 +406,20 @@ uLong ZEXPORT crc32_combine(crc1, crc2, len2)
crc1 ^= crc2; crc1 ^= crc2;
return crc1; return crc1;
} }
/* ========================================================================= */
uLong ZEXPORT crc32_combine(crc1, crc2, len2)
uLong crc1;
uLong crc2;
z_off_t len2;
{
return crc32_combine_(crc1, crc2, len2);
}
uLong ZEXPORT crc32_combine64(crc1, crc2, len2)
uLong crc1;
uLong crc2;
z_off64_t len2;
{
return crc32_combine_(crc1, crc2, len2);
}

2
zlib/crc32.h
View file

@ -2,7 +2,7 @@
* Generated automatically by crc32.c * Generated automatically by crc32.c
*/ */
local const unsigned long FAR crc_table[TBLS][256] = local const z_crc_t FAR crc_table[TBLS][256] =
{ {
{ {
0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL, 0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,

513
zlib/deflate.c
View file

@ -1,5 +1,5 @@
/* deflate.c -- compress data using the deflation algorithm /* deflate.c -- compress data using the deflation algorithm
* Copyright (C) 1995-2005 Jean-loup Gailly. * Copyright (C) 1995-2012 Jean-loup Gailly and Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -37,7 +37,7 @@
* REFERENCES * REFERENCES
* *
* Deutsch, L.P.,"DEFLATE Compressed Data Format Specification". * Deutsch, L.P.,"DEFLATE Compressed Data Format Specification".
* Available in http://www.ietf.org/rfc/rfc1951.txt * Available in http://tools.ietf.org/html/rfc1951
* *
* A description of the Rabin and Karp algorithm is given in the book * A description of the Rabin and Karp algorithm is given in the book
* "Algorithms" by R. Sedgewick, Addison-Wesley, p252. * "Algorithms" by R. Sedgewick, Addison-Wesley, p252.
@ -52,7 +52,7 @@
#include "deflate.h" #include "deflate.h"
const char deflate_copyright[] = const char deflate_copyright[] =
" deflate 1.2.3 Copyright 1995-2005 Jean-loup Gailly "; " deflate 1.2.7 Copyright 1995-2012 Jean-loup Gailly and Mark Adler ";
/* /*
If you use the zlib library in a product, an acknowledgment is welcome If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot in the documentation of your product. If for some reason you cannot
@ -79,19 +79,18 @@ local block_state deflate_fast OF((deflate_state *s, int flush));
#ifndef FASTEST #ifndef FASTEST
local block_state deflate_slow OF((deflate_state *s, int flush)); local block_state deflate_slow OF((deflate_state *s, int flush));
#endif #endif
local block_state deflate_rle OF((deflate_state *s, int flush));
local block_state deflate_huff OF((deflate_state *s, int flush));
local void lm_init OF((deflate_state *s)); local void lm_init OF((deflate_state *s));
local void putShortMSB OF((deflate_state *s, uInt b)); local void putShortMSB OF((deflate_state *s, uInt b));
local void flush_pending OF((z_streamp strm)); local void flush_pending OF((z_streamp strm));
local int read_buf OF((z_streamp strm, Bytef *buf, unsigned size)); local int read_buf OF((z_streamp strm, Bytef *buf, unsigned size));
#ifndef FASTEST
#ifdef ASMV #ifdef ASMV
void match_init OF((void)); /* asm code initialization */ void match_init OF((void)); /* asm code initialization */
uInt longest_match OF((deflate_state *s, IPos cur_match)); uInt longest_match OF((deflate_state *s, IPos cur_match));
#else #else
local uInt longest_match OF((deflate_state *s, IPos cur_match)); local uInt longest_match OF((deflate_state *s, IPos cur_match));
#endif #endif
#endif
local uInt longest_match_fast OF((deflate_state *s, IPos cur_match));
#ifdef DEBUG #ifdef DEBUG
local void check_match OF((deflate_state *s, IPos start, IPos match, local void check_match OF((deflate_state *s, IPos start, IPos match,
@ -110,11 +109,6 @@ local void check_match OF((deflate_state *s, IPos start, IPos match,
#endif #endif
/* Matches of length 3 are discarded if their distance exceeds TOO_FAR */ /* Matches of length 3 are discarded if their distance exceeds TOO_FAR */
#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
/* Minimum amount of lookahead, except at the end of the input file.
* See deflate.c for comments about the MIN_MATCH+1.
*/
/* Values for max_lazy_match, good_match and max_chain_length, depending on /* Values for max_lazy_match, good_match and max_chain_length, depending on
* the desired pack level (0..9). The values given below have been tuned to * the desired pack level (0..9). The values given below have been tuned to
* exclude worst case performance for pathological files. Better values may be * exclude worst case performance for pathological files. Better values may be
@ -161,6 +155,9 @@ local const config configuration_table[10] = {
struct static_tree_desc_s {int dummy;}; /* for buggy compilers */ struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
#endif #endif
/* rank Z_BLOCK between Z_NO_FLUSH and Z_PARTIAL_FLUSH */
#define RANK(f) (((f) << 1) - ((f) > 4 ? 9 : 0))
/* =========================================================================== /* ===========================================================================
* Update a hash value with the given input byte * Update a hash value with the given input byte
* IN assertion: all calls to to UPDATE_HASH are made with consecutive * IN assertion: all calls to to UPDATE_HASH are made with consecutive
@ -241,10 +238,19 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
strm->msg = Z_NULL; strm->msg = Z_NULL;
if (strm->zalloc == (alloc_func)0) { if (strm->zalloc == (alloc_func)0) {
#ifdef Z_SOLO
return Z_STREAM_ERROR;
#else
strm->zalloc = zcalloc; strm->zalloc = zcalloc;
strm->opaque = (voidpf)0; strm->opaque = (voidpf)0;
#endif
} }
if (strm->zfree == (free_func)0) strm->zfree = zcfree; if (strm->zfree == (free_func)0)
#ifdef Z_SOLO
return Z_STREAM_ERROR;
#else
strm->zfree = zcfree;
#endif
#ifdef FASTEST #ifdef FASTEST
if (level != 0) level = 1; if (level != 0) level = 1;
@ -288,6 +294,8 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
s->prev = (Posf *) ZALLOC(strm, s->w_size, sizeof(Pos)); s->prev = (Posf *) ZALLOC(strm, s->w_size, sizeof(Pos));
s->head = (Posf *) ZALLOC(strm, s->hash_size, sizeof(Pos)); s->head = (Posf *) ZALLOC(strm, s->hash_size, sizeof(Pos));
s->high_water = 0; /* nothing written to s->window yet */
s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */ s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */
overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2); overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);
@ -318,43 +326,70 @@ int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
uInt dictLength; uInt dictLength;
{ {
deflate_state *s; deflate_state *s;
uInt length = dictLength; uInt str, n;
uInt n; int wrap;
IPos hash_head = 0; unsigned avail;
unsigned char *next;
if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL || if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL)
strm->state->wrap == 2 || return Z_STREAM_ERROR;
(strm->state->wrap == 1 && strm->state->status != INIT_STATE)) s = strm->state;
wrap = s->wrap;
if (wrap == 2 || (wrap == 1 && s->status != INIT_STATE) || s->lookahead)
return Z_STREAM_ERROR; return Z_STREAM_ERROR;
s = strm->state; /* when using zlib wrappers, compute Adler-32 for provided dictionary */
if (s->wrap) if (wrap == 1)
strm->adler = adler32(strm->adler, dictionary, dictLength); strm->adler = adler32(strm->adler, dictionary, dictLength);
s->wrap = 0; /* avoid computing Adler-32 in read_buf */
if (length < MIN_MATCH) return Z_OK; /* if dictionary would fill window, just replace the history */
if (length > MAX_DIST(s)) { if (dictLength >= s->w_size) {
length = MAX_DIST(s); if (wrap == 0) { /* already empty otherwise */
dictionary += dictLength - length; /* use the tail of the dictionary */ CLEAR_HASH(s);
s->strstart = 0;
s->block_start = 0L;
s->insert = 0;
}
dictionary += dictLength - s->w_size; /* use the tail */
dictLength = s->w_size;
} }
zmemcpy(s->window, dictionary, length);
s->strstart = length;
s->block_start = (long)length;
/* Insert all strings in the hash table (except for the last two bytes). /* insert dictionary into window and hash */
* s->lookahead stays null, so s->ins_h will be recomputed at the next avail = strm->avail_in;
* call of fill_window. next = strm->next_in;
*/ strm->avail_in = dictLength;
s->ins_h = s->window[0]; strm->next_in = (Bytef *)dictionary;
UPDATE_HASH(s, s->ins_h, s->window[1]); fill_window(s);
for (n = 0; n <= length - MIN_MATCH; n++) { while (s->lookahead >= MIN_MATCH) {
INSERT_STRING(s, n, hash_head); str = s->strstart;
n = s->lookahead - (MIN_MATCH-1);
do {
UPDATE_HASH(s, s->ins_h, s->window[str + MIN_MATCH-1]);
#ifndef FASTEST
s->prev[str & s->w_mask] = s->head[s->ins_h];
#endif
s->head[s->ins_h] = (Pos)str;
str++;
} while (--n);
s->strstart = str;
s->lookahead = MIN_MATCH-1;
fill_window(s);
} }
if (hash_head) hash_head = 0; /* to make compiler happy */ s->strstart += s->lookahead;
s->block_start = (long)s->strstart;
s->insert = s->lookahead;
s->lookahead = 0;
s->match_length = s->prev_length = MIN_MATCH-1;
s->match_available = 0;
strm->next_in = next;
strm->avail_in = avail;
s->wrap = wrap;
return Z_OK; return Z_OK;
} }
/* ========================================================================= */ /* ========================================================================= */
int ZEXPORT deflateReset (strm) int ZEXPORT deflateResetKeep (strm)
z_streamp strm; z_streamp strm;
{ {
deflate_state *s; deflate_state *s;
@ -384,11 +419,22 @@ int ZEXPORT deflateReset (strm)
s->last_flush = Z_NO_FLUSH; s->last_flush = Z_NO_FLUSH;
_tr_init(s); _tr_init(s);
lm_init(s);
return Z_OK; return Z_OK;
} }
/* ========================================================================= */
int ZEXPORT deflateReset (strm)
z_streamp strm;
{
int ret;
ret = deflateResetKeep(strm);
if (ret == Z_OK)
lm_init(strm->state);
return ret;
}
/* ========================================================================= */ /* ========================================================================= */
int ZEXPORT deflateSetHeader (strm, head) int ZEXPORT deflateSetHeader (strm, head)
z_streamp strm; z_streamp strm;
@ -400,15 +446,43 @@ int ZEXPORT deflateSetHeader (strm, head)
return Z_OK; return Z_OK;
} }
/* ========================================================================= */
int ZEXPORT deflatePending (strm, pending, bits)
unsigned *pending;
int *bits;
z_streamp strm;
{
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
if (pending != Z_NULL)
*pending = strm->state->pending;
if (bits != Z_NULL)
*bits = strm->state->bi_valid;
return Z_OK;
}
/* ========================================================================= */ /* ========================================================================= */
int ZEXPORT deflatePrime (strm, bits, value) int ZEXPORT deflatePrime (strm, bits, value)
z_streamp strm; z_streamp strm;
int bits; int bits;
int value; int value;
{ {
deflate_state *s;
int put;
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
strm->state->bi_valid = bits; s = strm->state;
strm->state->bi_buf = (ush)(value & ((1 << bits) - 1)); if ((Bytef *)(s->d_buf) < s->pending_out + ((Buf_size + 7) >> 3))
return Z_BUF_ERROR;
do {
put = Buf_size - s->bi_valid;
if (put > bits)
put = bits;
s->bi_buf |= (ush)((value & ((1 << put) - 1)) << s->bi_valid);
s->bi_valid += put;
_tr_flush_bits(s);
value >>= put;
bits -= put;
} while (bits);
return Z_OK; return Z_OK;
} }
@ -435,9 +509,10 @@ int ZEXPORT deflateParams(strm, level, strategy)
} }
func = configuration_table[s->level].func; func = configuration_table[s->level].func;
if (func != configuration_table[level].func && strm->total_in != 0) { if ((strategy != s->strategy || func != configuration_table[level].func) &&
strm->total_in != 0) {
/* Flush the last buffer: */ /* Flush the last buffer: */
err = deflate(strm, Z_PARTIAL_FLUSH); err = deflate(strm, Z_BLOCK);
} }
if (s->level != level) { if (s->level != level) {
s->level = level; s->level = level;
@ -481,33 +556,66 @@ int ZEXPORT deflateTune(strm, good_length, max_lazy, nice_length, max_chain)
* resulting from using fixed blocks instead of stored blocks, which deflate * resulting from using fixed blocks instead of stored blocks, which deflate
* can emit on compressed data for some combinations of the parameters. * can emit on compressed data for some combinations of the parameters.
* *
* This function could be more sophisticated to provide closer upper bounds * This function could be more sophisticated to provide closer upper bounds for
* for every combination of windowBits and memLevel, as well as wrap. * every combination of windowBits and memLevel. But even the conservative
* But even the conservative upper bound of about 14% expansion does not * upper bound of about 14% expansion does not seem onerous for output buffer
* seem onerous for output buffer allocation. * allocation.
*/ */
uLong ZEXPORT deflateBound(strm, sourceLen) uLong ZEXPORT deflateBound(strm, sourceLen)
z_streamp strm; z_streamp strm;
uLong sourceLen; uLong sourceLen;
{ {
deflate_state *s; deflate_state *s;
uLong destLen; uLong complen, wraplen;
Bytef *str;
/* conservative upper bound */ /* conservative upper bound for compressed data */
destLen = sourceLen + complen = sourceLen +
((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 11; ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 5;
/* if can't get parameters, return conservative bound */ /* if can't get parameters, return conservative bound plus zlib wrapper */
if (strm == Z_NULL || strm->state == Z_NULL) if (strm == Z_NULL || strm->state == Z_NULL)
return destLen; return complen + 6;
/* compute wrapper length */
s = strm->state;
switch (s->wrap) {
case 0: /* raw deflate */
wraplen = 0;
break;
case 1: /* zlib wrapper */
wraplen = 6 + (s->strstart ? 4 : 0);
break;
case 2: /* gzip wrapper */
wraplen = 18;
if (s->gzhead != Z_NULL) { /* user-supplied gzip header */
if (s->gzhead->extra != Z_NULL)
wraplen += 2 + s->gzhead->extra_len;
str = s->gzhead->name;
if (str != Z_NULL)
do {
wraplen++;
} while (*str++);
str = s->gzhead->comment;
if (str != Z_NULL)
do {
wraplen++;
} while (*str++);
if (s->gzhead->hcrc)
wraplen += 2;
}
break;
default: /* for compiler happiness */
wraplen = 6;
}
/* if not default parameters, return conservative bound */ /* if not default parameters, return conservative bound */
s = strm->state;
if (s->w_bits != 15 || s->hash_bits != 8 + 7) if (s->w_bits != 15 || s->hash_bits != 8 + 7)
return destLen; return complen + wraplen;
/* default settings: return tight bound for that case */ /* default settings: return tight bound for that case */
return compressBound(sourceLen); return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) +
(sourceLen >> 25) + 13 - 6 + wraplen;
} }
/* ========================================================================= /* =========================================================================
@ -532,19 +640,22 @@ local void putShortMSB (s, b)
local void flush_pending(strm) local void flush_pending(strm)
z_streamp strm; z_streamp strm;
{ {
unsigned len = strm->state->pending; unsigned len;
deflate_state *s = strm->state;
_tr_flush_bits(s);
len = s->pending;
if (len > strm->avail_out) len = strm->avail_out; if (len > strm->avail_out) len = strm->avail_out;
if (len == 0) return; if (len == 0) return;
zmemcpy(strm->next_out, strm->state->pending_out, len); zmemcpy(strm->next_out, s->pending_out, len);
strm->next_out += len; strm->next_out += len;
strm->state->pending_out += len; s->pending_out += len;
strm->total_out += len; strm->total_out += len;
strm->avail_out -= len; strm->avail_out -= len;
strm->state->pending -= len; s->pending -= len;
if (strm->state->pending == 0) { if (s->pending == 0) {
strm->state->pending_out = strm->state->pending_buf; s->pending_out = s->pending_buf;
} }
} }
@ -557,7 +668,7 @@ int ZEXPORT deflate (strm, flush)
deflate_state *s; deflate_state *s;
if (strm == Z_NULL || strm->state == Z_NULL || if (strm == Z_NULL || strm->state == Z_NULL ||
flush > Z_FINISH || flush < 0) { flush > Z_BLOCK || flush < 0) {
return Z_STREAM_ERROR; return Z_STREAM_ERROR;
} }
s = strm->state; s = strm->state;
@ -581,7 +692,7 @@ int ZEXPORT deflate (strm, flush)
put_byte(s, 31); put_byte(s, 31);
put_byte(s, 139); put_byte(s, 139);
put_byte(s, 8); put_byte(s, 8);
if (s->gzhead == NULL) { if (s->gzhead == Z_NULL) {
put_byte(s, 0); put_byte(s, 0);
put_byte(s, 0); put_byte(s, 0);
put_byte(s, 0); put_byte(s, 0);
@ -608,7 +719,7 @@ int ZEXPORT deflate (strm, flush)
(s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ? (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
4 : 0)); 4 : 0));
put_byte(s, s->gzhead->os & 0xff); put_byte(s, s->gzhead->os & 0xff);
if (s->gzhead->extra != NULL) { if (s->gzhead->extra != Z_NULL) {
put_byte(s, s->gzhead->extra_len & 0xff); put_byte(s, s->gzhead->extra_len & 0xff);
put_byte(s, (s->gzhead->extra_len >> 8) & 0xff); put_byte(s, (s->gzhead->extra_len >> 8) & 0xff);
} }
@ -650,7 +761,7 @@ int ZEXPORT deflate (strm, flush)
} }
#ifdef GZIP #ifdef GZIP
if (s->status == EXTRA_STATE) { if (s->status == EXTRA_STATE) {
if (s->gzhead->extra != NULL) { if (s->gzhead->extra != Z_NULL) {
uInt beg = s->pending; /* start of bytes to update crc */ uInt beg = s->pending; /* start of bytes to update crc */
while (s->gzindex < (s->gzhead->extra_len & 0xffff)) { while (s->gzindex < (s->gzhead->extra_len & 0xffff)) {
@ -678,7 +789,7 @@ int ZEXPORT deflate (strm, flush)
s->status = NAME_STATE; s->status = NAME_STATE;
} }
if (s->status == NAME_STATE) { if (s->status == NAME_STATE) {
if (s->gzhead->name != NULL) { if (s->gzhead->name != Z_NULL) {
uInt beg = s->pending; /* start of bytes to update crc */ uInt beg = s->pending; /* start of bytes to update crc */
int val; int val;
@ -709,7 +820,7 @@ int ZEXPORT deflate (strm, flush)
s->status = COMMENT_STATE; s->status = COMMENT_STATE;
} }
if (s->status == COMMENT_STATE) { if (s->status == COMMENT_STATE) {
if (s->gzhead->comment != NULL) { if (s->gzhead->comment != Z_NULL) {
uInt beg = s->pending; /* start of bytes to update crc */ uInt beg = s->pending; /* start of bytes to update crc */
int val; int val;
@ -771,7 +882,7 @@ int ZEXPORT deflate (strm, flush)
* flushes. For repeated and useless calls with Z_FINISH, we keep * flushes. For repeated and useless calls with Z_FINISH, we keep
* returning Z_STREAM_END instead of Z_BUF_ERROR. * returning Z_STREAM_END instead of Z_BUF_ERROR.
*/ */
} else if (strm->avail_in == 0 && flush <= old_flush && } else if (strm->avail_in == 0 && RANK(flush) <= RANK(old_flush) &&
flush != Z_FINISH) { flush != Z_FINISH) {
ERR_RETURN(strm, Z_BUF_ERROR); ERR_RETURN(strm, Z_BUF_ERROR);
} }
@ -787,7 +898,9 @@ int ZEXPORT deflate (strm, flush)
(flush != Z_NO_FLUSH && s->status != FINISH_STATE)) { (flush != Z_NO_FLUSH && s->status != FINISH_STATE)) {
block_state bstate; block_state bstate;
bstate = (*(configuration_table[s->level].func))(s, flush); bstate = s->strategy == Z_HUFFMAN_ONLY ? deflate_huff(s, flush) :
(s->strategy == Z_RLE ? deflate_rle(s, flush) :
(*(configuration_table[s->level].func))(s, flush));
if (bstate == finish_started || bstate == finish_done) { if (bstate == finish_started || bstate == finish_done) {
s->status = FINISH_STATE; s->status = FINISH_STATE;
@ -808,13 +921,18 @@ int ZEXPORT deflate (strm, flush)
if (bstate == block_done) { if (bstate == block_done) {
if (flush == Z_PARTIAL_FLUSH) { if (flush == Z_PARTIAL_FLUSH) {
_tr_align(s); _tr_align(s);
} else { /* FULL_FLUSH or SYNC_FLUSH */ } else if (flush != Z_BLOCK) { /* FULL_FLUSH or SYNC_FLUSH */
_tr_stored_block(s, (char*)0, 0L, 0); _tr_stored_block(s, (char*)0, 0L, 0);
/* For a full flush, this empty block will be recognized /* For a full flush, this empty block will be recognized
* as a special marker by inflate_sync(). * as a special marker by inflate_sync().
*/ */
if (flush == Z_FULL_FLUSH) { if (flush == Z_FULL_FLUSH) {
CLEAR_HASH(s); /* forget history */ CLEAR_HASH(s); /* forget history */
if (s->lookahead == 0) {
s->strstart = 0;
s->block_start = 0L;
s->insert = 0;
}
} }
} }
flush_pending(strm); flush_pending(strm);
@ -909,12 +1027,12 @@ int ZEXPORT deflateCopy (dest, source)
ss = source->state; ss = source->state;
zmemcpy(dest, source, sizeof(z_stream)); zmemcpy((voidpf)dest, (voidpf)source, sizeof(z_stream));
ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state)); ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state));
if (ds == Z_NULL) return Z_MEM_ERROR; if (ds == Z_NULL) return Z_MEM_ERROR;
dest->state = (struct internal_state FAR *) ds; dest->state = (struct internal_state FAR *) ds;
zmemcpy(ds, ss, sizeof(deflate_state)); zmemcpy((voidpf)ds, (voidpf)ss, sizeof(deflate_state));
ds->strm = dest; ds->strm = dest;
ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte)); ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));
@ -930,8 +1048,8 @@ int ZEXPORT deflateCopy (dest, source)
} }
/* following zmemcpy do not work for 16-bit MSDOS */ /* following zmemcpy do not work for 16-bit MSDOS */
zmemcpy(ds->window, ss->window, ds->w_size * 2 * sizeof(Byte)); zmemcpy(ds->window, ss->window, ds->w_size * 2 * sizeof(Byte));
zmemcpy(ds->prev, ss->prev, ds->w_size * sizeof(Pos)); zmemcpy((voidpf)ds->prev, (voidpf)ss->prev, ds->w_size * sizeof(Pos));
zmemcpy(ds->head, ss->head, ds->hash_size * sizeof(Pos)); zmemcpy((voidpf)ds->head, (voidpf)ss->head, ds->hash_size * sizeof(Pos));
zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size); zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size);
ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf); ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf);
@ -965,15 +1083,15 @@ local int read_buf(strm, buf, size)
strm->avail_in -= len; strm->avail_in -= len;
zmemcpy(buf, strm->next_in, len);
if (strm->state->wrap == 1) { if (strm->state->wrap == 1) {
strm->adler = adler32(strm->adler, strm->next_in, len); strm->adler = adler32(strm->adler, buf, len);
} }
#ifdef GZIP #ifdef GZIP
else if (strm->state->wrap == 2) { else if (strm->state->wrap == 2) {
strm->adler = crc32(strm->adler, strm->next_in, len); strm->adler = crc32(strm->adler, buf, len);
} }
#endif #endif
zmemcpy(buf, strm->next_in, len);
strm->next_in += len; strm->next_in += len;
strm->total_in += len; strm->total_in += len;
@ -1000,6 +1118,7 @@ local void lm_init (s)
s->strstart = 0; s->strstart = 0;
s->block_start = 0L; s->block_start = 0L;
s->lookahead = 0; s->lookahead = 0;
s->insert = 0;
s->match_length = s->prev_length = MIN_MATCH-1; s->match_length = s->prev_length = MIN_MATCH-1;
s->match_available = 0; s->match_available = 0;
s->ins_h = 0; s->ins_h = 0;
@ -1167,12 +1286,13 @@ local uInt longest_match(s, cur_match)
return s->lookahead; return s->lookahead;
} }
#endif /* ASMV */ #endif /* ASMV */
#endif /* FASTEST */
#else /* FASTEST */
/* --------------------------------------------------------------------------- /* ---------------------------------------------------------------------------
* Optimized version for level == 1 or strategy == Z_RLE only * Optimized version for FASTEST only
*/ */
local uInt longest_match_fast(s, cur_match) local uInt longest_match(s, cur_match)
deflate_state *s; deflate_state *s;
IPos cur_match; /* current match */ IPos cur_match; /* current match */
{ {
@ -1225,6 +1345,8 @@ local uInt longest_match_fast(s, cur_match)
return (uInt)len <= s->lookahead ? (uInt)len : s->lookahead; return (uInt)len <= s->lookahead ? (uInt)len : s->lookahead;
} }
#endif /* FASTEST */
#ifdef DEBUG #ifdef DEBUG
/* =========================================================================== /* ===========================================================================
* Check that the match at match_start is indeed a match. * Check that the match at match_start is indeed a match.
@ -1271,6 +1393,8 @@ local void fill_window(s)
unsigned more; /* Amount of free space at the end of the window. */ unsigned more; /* Amount of free space at the end of the window. */
uInt wsize = s->w_size; uInt wsize = s->w_size;
Assert(s->lookahead < MIN_LOOKAHEAD, "already enough lookahead");
do { do {
more = (unsigned)(s->window_size -(ulg)s->lookahead -(ulg)s->strstart); more = (unsigned)(s->window_size -(ulg)s->lookahead -(ulg)s->strstart);
@ -1303,7 +1427,6 @@ local void fill_window(s)
later. (Using level 0 permanently is not an optimal usage of later. (Using level 0 permanently is not an optimal usage of
zlib, so we don't care about this pathological case.) zlib, so we don't care about this pathological case.)
*/ */
/* %%% avoid this when Z_RLE */
n = s->hash_size; n = s->hash_size;
p = &s->head[n]; p = &s->head[n];
do { do {
@ -1324,7 +1447,7 @@ local void fill_window(s)
#endif #endif
more += wsize; more += wsize;
} }
if (s->strm->avail_in == 0) return; if (s->strm->avail_in == 0) break;
/* If there was no sliding: /* If there was no sliding:
* strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 && * strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&
@ -1343,39 +1466,88 @@ local void fill_window(s)
s->lookahead += n; s->lookahead += n;
/* Initialize the hash value now that we have some input: */ /* Initialize the hash value now that we have some input: */
if (s->lookahead >= MIN_MATCH) { if (s->lookahead + s->insert >= MIN_MATCH) {
s->ins_h = s->window[s->strstart]; uInt str = s->strstart - s->insert;
UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]); s->ins_h = s->window[str];
UPDATE_HASH(s, s->ins_h, s->window[str + 1]);
#if MIN_MATCH != 3 #if MIN_MATCH != 3
Call UPDATE_HASH() MIN_MATCH-3 more times Call UPDATE_HASH() MIN_MATCH-3 more times
#endif #endif
while (s->insert) {
UPDATE_HASH(s, s->ins_h, s->window[str + MIN_MATCH-1]);
#ifndef FASTEST
s->prev[str & s->w_mask] = s->head[s->ins_h];
#endif
s->head[s->ins_h] = (Pos)str;
str++;
s->insert--;
if (s->lookahead + s->insert < MIN_MATCH)
break;
}
} }
/* If the whole input has less than MIN_MATCH bytes, ins_h is garbage, /* If the whole input has less than MIN_MATCH bytes, ins_h is garbage,
* but this is not important since only literal bytes will be emitted. * but this is not important since only literal bytes will be emitted.
*/ */
} while (s->lookahead < MIN_LOOKAHEAD && s->strm->avail_in != 0); } while (s->lookahead < MIN_LOOKAHEAD && s->strm->avail_in != 0);
/* If the WIN_INIT bytes after the end of the current data have never been
* written, then zero those bytes in order to avoid memory check reports of
* the use of uninitialized (or uninitialised as Julian writes) bytes by
* the longest match routines. Update the high water mark for the next
* time through here. WIN_INIT is set to MAX_MATCH since the longest match
* routines allow scanning to strstart + MAX_MATCH, ignoring lookahead.
*/
if (s->high_water < s->window_size) {
ulg curr = s->strstart + (ulg)(s->lookahead);
ulg init;
if (s->high_water < curr) {
/* Previous high water mark below current data -- zero WIN_INIT
* bytes or up to end of window, whichever is less.
*/
init = s->window_size - curr;
if (init > WIN_INIT)
init = WIN_INIT;
zmemzero(s->window + curr, (unsigned)init);
s->high_water = curr + init;
}
else if (s->high_water < (ulg)curr + WIN_INIT) {
/* High water mark at or above current data, but below current data
* plus WIN_INIT -- zero out to current data plus WIN_INIT, or up
* to end of window, whichever is less.
*/
init = (ulg)curr + WIN_INIT - s->high_water;
if (init > s->window_size - s->high_water)
init = s->window_size - s->high_water;
zmemzero(s->window + s->high_water, (unsigned)init);
s->high_water += init;
}
}
Assert((ulg)s->strstart <= s->window_size - MIN_LOOKAHEAD,
"not enough room for search");
} }
/* =========================================================================== /* ===========================================================================
* Flush the current block, with given end-of-file flag. * Flush the current block, with given end-of-file flag.
* IN assertion: strstart is set to the end of the current match. * IN assertion: strstart is set to the end of the current match.
*/ */
#define FLUSH_BLOCK_ONLY(s, eof) { \ #define FLUSH_BLOCK_ONLY(s, last) { \
_tr_flush_block(s, (s->block_start >= 0L ? \ _tr_flush_block(s, (s->block_start >= 0L ? \
(charf *)&s->window[(unsigned)s->block_start] : \ (charf *)&s->window[(unsigned)s->block_start] : \
(charf *)Z_NULL), \ (charf *)Z_NULL), \
(ulg)((long)s->strstart - s->block_start), \ (ulg)((long)s->strstart - s->block_start), \
(eof)); \ (last)); \
s->block_start = s->strstart; \ s->block_start = s->strstart; \
flush_pending(s->strm); \ flush_pending(s->strm); \
Tracev((stderr,"[FLUSH]")); \ Tracev((stderr,"[FLUSH]")); \
} }
/* Same but force premature exit if necessary. */ /* Same but force premature exit if necessary. */
#define FLUSH_BLOCK(s, eof) { \ #define FLUSH_BLOCK(s, last) { \
FLUSH_BLOCK_ONLY(s, eof); \ FLUSH_BLOCK_ONLY(s, last); \
if (s->strm->avail_out == 0) return (eof) ? finish_started : need_more; \ if (s->strm->avail_out == 0) return (last) ? finish_started : need_more; \
} }
/* =========================================================================== /* ===========================================================================
@ -1434,8 +1606,14 @@ local block_state deflate_stored(s, flush)
FLUSH_BLOCK(s, 0); FLUSH_BLOCK(s, 0);
} }
} }
FLUSH_BLOCK(s, flush == Z_FINISH); s->insert = 0;
return flush == Z_FINISH ? finish_done : block_done; if (flush == Z_FINISH) {
FLUSH_BLOCK(s, 1);
return finish_done;
}
if ((long)s->strstart > s->block_start)
FLUSH_BLOCK(s, 0);
return block_done;
} }
/* =========================================================================== /* ===========================================================================
@ -1449,7 +1627,7 @@ local block_state deflate_fast(s, flush)
deflate_state *s; deflate_state *s;
int flush; int flush;
{ {
IPos hash_head = NIL; /* head of the hash chain */ IPos hash_head; /* head of the hash chain */
int bflush; /* set if current block must be flushed */ int bflush; /* set if current block must be flushed */
for (;;) { for (;;) {
@ -1469,6 +1647,7 @@ local block_state deflate_fast(s, flush)
/* Insert the string window[strstart .. strstart+2] in the /* Insert the string window[strstart .. strstart+2] in the
* dictionary, and set hash_head to the head of the hash chain: * dictionary, and set hash_head to the head of the hash chain:
*/ */
hash_head = NIL;
if (s->lookahead >= MIN_MATCH) { if (s->lookahead >= MIN_MATCH) {
INSERT_STRING(s, s->strstart, hash_head); INSERT_STRING(s, s->strstart, hash_head);
} }
@ -1481,19 +1660,8 @@ local block_state deflate_fast(s, flush)
* of window index 0 (in particular we have to avoid a match * of window index 0 (in particular we have to avoid a match
* of the string with itself at the start of the input file). * of the string with itself at the start of the input file).
*/ */
#ifdef FASTEST s->match_length = longest_match (s, hash_head);
if ((s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) || /* longest_match() sets match_start */
(s->strategy == Z_RLE && s->strstart - hash_head == 1)) {
s->match_length = longest_match_fast (s, hash_head);
}
#else
if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) {
s->match_length = longest_match (s, hash_head);
} else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
s->match_length = longest_match_fast (s, hash_head);
}
#endif
/* longest_match() or longest_match_fast() sets match_start */
} }
if (s->match_length >= MIN_MATCH) { if (s->match_length >= MIN_MATCH) {
check_match(s, s->strstart, s->match_start, s->match_length); check_match(s, s->strstart, s->match_start, s->match_length);
@ -1541,8 +1709,14 @@ local block_state deflate_fast(s, flush)
} }
if (bflush) FLUSH_BLOCK(s, 0); if (bflush) FLUSH_BLOCK(s, 0);
} }
FLUSH_BLOCK(s, flush == Z_FINISH); s->insert = s->strstart < MIN_MATCH-1 ? s->strstart : MIN_MATCH-1;
return flush == Z_FINISH ? finish_done : block_done; if (flush == Z_FINISH) {
FLUSH_BLOCK(s, 1);
return finish_done;
}
if (s->last_lit)
FLUSH_BLOCK(s, 0);
return block_done;
} }
#ifndef FASTEST #ifndef FASTEST
@ -1555,7 +1729,7 @@ local block_state deflate_slow(s, flush)
deflate_state *s; deflate_state *s;
int flush; int flush;
{ {
IPos hash_head = NIL; /* head of hash chain */ IPos hash_head; /* head of hash chain */
int bflush; /* set if current block must be flushed */ int bflush; /* set if current block must be flushed */
/* Process the input block. */ /* Process the input block. */
@ -1576,6 +1750,7 @@ local block_state deflate_slow(s, flush)
/* Insert the string window[strstart .. strstart+2] in the /* Insert the string window[strstart .. strstart+2] in the
* dictionary, and set hash_head to the head of the hash chain: * dictionary, and set hash_head to the head of the hash chain:
*/ */
hash_head = NIL;
if (s->lookahead >= MIN_MATCH) { if (s->lookahead >= MIN_MATCH) {
INSERT_STRING(s, s->strstart, hash_head); INSERT_STRING(s, s->strstart, hash_head);
} }
@ -1591,12 +1766,8 @@ local block_state deflate_slow(s, flush)
* of window index 0 (in particular we have to avoid a match * of window index 0 (in particular we have to avoid a match
* of the string with itself at the start of the input file). * of the string with itself at the start of the input file).
*/ */
if (s->strategy != Z_HUFFMAN_ONLY && s->strategy != Z_RLE) { s->match_length = longest_match (s, hash_head);
s->match_length = longest_match (s, hash_head); /* longest_match() sets match_start */
} else if (s->strategy == Z_RLE && s->strstart - hash_head == 1) {
s->match_length = longest_match_fast (s, hash_head);
}
/* longest_match() or longest_match_fast() sets match_start */
if (s->match_length <= 5 && (s->strategy == Z_FILTERED if (s->match_length <= 5 && (s->strategy == Z_FILTERED
#if TOO_FAR <= 32767 #if TOO_FAR <= 32767
@ -1669,12 +1840,17 @@ local block_state deflate_slow(s, flush)
_tr_tally_lit(s, s->window[s->strstart-1], bflush); _tr_tally_lit(s, s->window[s->strstart-1], bflush);
s->match_available = 0; s->match_available = 0;
} }
FLUSH_BLOCK(s, flush == Z_FINISH); s->insert = s->strstart < MIN_MATCH-1 ? s->strstart : MIN_MATCH-1;
return flush == Z_FINISH ? finish_done : block_done; if (flush == Z_FINISH) {
FLUSH_BLOCK(s, 1);
return finish_done;
}
if (s->last_lit)
FLUSH_BLOCK(s, 0);
return block_done;
} }
#endif /* FASTEST */ #endif /* FASTEST */
#if 0
/* =========================================================================== /* ===========================================================================
* For Z_RLE, simply look for runs of bytes, generate matches only of distance * For Z_RLE, simply look for runs of bytes, generate matches only of distance
* one. Do not maintain a hash table. (It will be regenerated if this run of * one. Do not maintain a hash table. (It will be regenerated if this run of
@ -1684,43 +1860,52 @@ local block_state deflate_rle(s, flush)
deflate_state *s; deflate_state *s;
int flush; int flush;
{ {
int bflush; /* set if current block must be flushed */ int bflush; /* set if current block must be flushed */
uInt run; /* length of run */ uInt prev; /* byte at distance one to match */
uInt max; /* maximum length of run */ Bytef *scan, *strend; /* scan goes up to strend for length of run */
uInt prev; /* byte at distance one to match */
Bytef *scan; /* scan for end of run */
for (;;) { for (;;) {
/* Make sure that we always have enough lookahead, except /* Make sure that we always have enough lookahead, except
* at the end of the input file. We need MAX_MATCH bytes * at the end of the input file. We need MAX_MATCH bytes
* for the longest encodable run. * for the longest run, plus one for the unrolled loop.
*/ */
if (s->lookahead < MAX_MATCH) { if (s->lookahead <= MAX_MATCH) {
fill_window(s); fill_window(s);
if (s->lookahead < MAX_MATCH && flush == Z_NO_FLUSH) { if (s->lookahead <= MAX_MATCH && flush == Z_NO_FLUSH) {
return need_more; return need_more;
} }
if (s->lookahead == 0) break; /* flush the current block */ if (s->lookahead == 0) break; /* flush the current block */
} }
/* See how many times the previous byte repeats */ /* See how many times the previous byte repeats */
run = 0; s->match_length = 0;
if (s->strstart > 0) { /* if there is a previous byte, that is */ if (s->lookahead >= MIN_MATCH && s->strstart > 0) {
max = s->lookahead < MAX_MATCH ? s->lookahead : MAX_MATCH;
scan = s->window + s->strstart - 1; scan = s->window + s->strstart - 1;
prev = *scan++; prev = *scan;
do { if (prev == *++scan && prev == *++scan && prev == *++scan) {
if (*scan++ != prev) strend = s->window + s->strstart + MAX_MATCH;
break; do {
} while (++run < max); } while (prev == *++scan && prev == *++scan &&
prev == *++scan && prev == *++scan &&
prev == *++scan && prev == *++scan &&
prev == *++scan && prev == *++scan &&
scan < strend);
s->match_length = MAX_MATCH - (int)(strend - scan);
if (s->match_length > s->lookahead)
s->match_length = s->lookahead;
}
Assert(scan <= s->window+(uInt)(s->window_size-1), "wild scan");
} }
/* Emit match if have run of MIN_MATCH or longer, else emit literal */ /* Emit match if have run of MIN_MATCH or longer, else emit literal */
if (run >= MIN_MATCH) { if (s->match_length >= MIN_MATCH) {
check_match(s, s->strstart, s->strstart - 1, run); check_match(s, s->strstart, s->strstart - 1, s->match_length);
_tr_tally_dist(s, 1, run - MIN_MATCH, bflush);
s->lookahead -= run; _tr_tally_dist(s, 1, s->match_length - MIN_MATCH, bflush);
s->strstart += run;
s->lookahead -= s->match_length;
s->strstart += s->match_length;
s->match_length = 0;
} else { } else {
/* No match, output a literal byte */ /* No match, output a literal byte */
Tracevv((stderr,"%c", s->window[s->strstart])); Tracevv((stderr,"%c", s->window[s->strstart]));
@ -1730,7 +1915,51 @@ local block_state deflate_rle(s, flush)
} }
if (bflush) FLUSH_BLOCK(s, 0); if (bflush) FLUSH_BLOCK(s, 0);
} }
FLUSH_BLOCK(s, flush == Z_FINISH); s->insert = 0;
return flush == Z_FINISH ? finish_done : block_done; if (flush == Z_FINISH) {
FLUSH_BLOCK(s, 1);
return finish_done;
}
if (s->last_lit)
FLUSH_BLOCK(s, 0);
return block_done;
}
/* ===========================================================================
* For Z_HUFFMAN_ONLY, do not look for matches. Do not maintain a hash table.
* (It will be regenerated if this run of deflate switches away from Huffman.)
*/
local block_state deflate_huff(s, flush)
deflate_state *s;
int flush;
{
int bflush; /* set if current block must be flushed */
for (;;) {
/* Make sure that we have a literal to write. */
if (s->lookahead == 0) {
fill_window(s);
if (s->lookahead == 0) {
if (flush == Z_NO_FLUSH)
return need_more;
break; /* flush the current block */
}
}
/* Output a literal byte */
s->match_length = 0;
Tracevv((stderr,"%c", s->window[s->strstart]));
_tr_tally_lit (s, s->window[s->strstart], bflush);
s->lookahead--;
s->strstart++;
if (bflush) FLUSH_BLOCK(s, 0);
}
s->insert = 0;
if (flush == Z_FINISH) {
FLUSH_BLOCK(s, 1);
return finish_done;
}
if (s->last_lit)
FLUSH_BLOCK(s, 0);
return block_done;
} }
#endif

43
zlib/deflate.h
View file

@ -1,5 +1,5 @@
/* deflate.h -- internal compression state /* deflate.h -- internal compression state
* Copyright (C) 1995-2004 Jean-loup Gailly * Copyright (C) 1995-2012 Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -48,6 +48,9 @@
#define MAX_BITS 15 #define MAX_BITS 15
/* All codes must not exceed MAX_BITS bits */ /* All codes must not exceed MAX_BITS bits */
#define Buf_size 16
/* size of bit buffer in bi_buf */
#define INIT_STATE 42 #define INIT_STATE 42
#define EXTRA_STATE 69 #define EXTRA_STATE 69
#define NAME_STATE 73 #define NAME_STATE 73
@ -188,7 +191,7 @@ typedef struct internal_state {
int nice_match; /* Stop searching when current match exceeds this */ int nice_match; /* Stop searching when current match exceeds this */
/* used by trees.c: */ /* used by trees.c: */
/* Didn't use ct_data typedef below to supress compiler warning */ /* Didn't use ct_data typedef below to suppress compiler warning */
struct ct_data_s dyn_ltree[HEAP_SIZE]; /* literal and length tree */ struct ct_data_s dyn_ltree[HEAP_SIZE]; /* literal and length tree */
struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */ struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */
struct ct_data_s bl_tree[2*BL_CODES+1]; /* Huffman tree for bit lengths */ struct ct_data_s bl_tree[2*BL_CODES+1]; /* Huffman tree for bit lengths */
@ -244,7 +247,7 @@ typedef struct internal_state {
ulg opt_len; /* bit length of current block with optimal trees */ ulg opt_len; /* bit length of current block with optimal trees */
ulg static_len; /* bit length of current block with static trees */ ulg static_len; /* bit length of current block with static trees */
uInt matches; /* number of string matches in current block */ uInt matches; /* number of string matches in current block */
int last_eob_len; /* bit length of EOB code for last block */ uInt insert; /* bytes at end of window left to insert */
#ifdef DEBUG #ifdef DEBUG
ulg compressed_len; /* total bit length of compressed file mod 2^32 */ ulg compressed_len; /* total bit length of compressed file mod 2^32 */
@ -260,6 +263,13 @@ typedef struct internal_state {
* are always zero. * are always zero.
*/ */
ulg high_water;
/* High water mark offset in window for initialized bytes -- bytes above
* this are set to zero in order to avoid memory check warnings when
* longest match routines access bytes past the input. This is then
* updated to the new high water mark.
*/
} FAR deflate_state; } FAR deflate_state;
/* Output a byte on the stream. /* Output a byte on the stream.
@ -278,14 +288,19 @@ typedef struct internal_state {
* distances are limited to MAX_DIST instead of WSIZE. * distances are limited to MAX_DIST instead of WSIZE.
*/ */
#define WIN_INIT MAX_MATCH
/* Number of bytes after end of data in window to initialize in order to avoid
memory checker errors from longest match routines */
/* in trees.c */ /* in trees.c */
void _tr_init OF((deflate_state *s)); void ZLIB_INTERNAL _tr_init OF((deflate_state *s));
int _tr_tally OF((deflate_state *s, unsigned dist, unsigned lc)); int ZLIB_INTERNAL _tr_tally OF((deflate_state *s, unsigned dist, unsigned lc));
void _tr_flush_block OF((deflate_state *s, charf *buf, ulg stored_len, void ZLIB_INTERNAL _tr_flush_block OF((deflate_state *s, charf *buf,
int eof)); ulg stored_len, int last));
void _tr_align OF((deflate_state *s)); void ZLIB_INTERNAL _tr_flush_bits OF((deflate_state *s));
void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len, void ZLIB_INTERNAL _tr_align OF((deflate_state *s));
int eof)); void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf,
ulg stored_len, int last));
#define d_code(dist) \ #define d_code(dist) \
((dist) < 256 ? _dist_code[dist] : _dist_code[256+((dist)>>7)]) ((dist) < 256 ? _dist_code[dist] : _dist_code[256+((dist)>>7)])
@ -298,11 +313,11 @@ void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len,
/* Inline versions of _tr_tally for speed: */ /* Inline versions of _tr_tally for speed: */
#if defined(GEN_TREES_H) || !defined(STDC) #if defined(GEN_TREES_H) || !defined(STDC)
extern uch _length_code[]; extern uch ZLIB_INTERNAL _length_code[];
extern uch _dist_code[]; extern uch ZLIB_INTERNAL _dist_code[];
#else #else
extern const uch _length_code[]; extern const uch ZLIB_INTERNAL _length_code[];
extern const uch _dist_code[]; extern const uch ZLIB_INTERNAL _dist_code[];
#endif #endif
# define _tr_tally_lit(s, c, flush) \ # define _tr_tally_lit(s, c, flush) \

131
zlib/trees.c
View file

@ -1,5 +1,6 @@
/* trees.c -- output deflated data using Huffman coding /* trees.c -- output deflated data using Huffman coding
* Copyright (C) 1995-2005 Jean-loup Gailly * Copyright (C) 1995-2012 Jean-loup Gailly
* detect_data_type() function provided freely by Cosmin Truta, 2006
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -73,11 +74,6 @@ local const uch bl_order[BL_CODES]
* probability, to avoid transmitting the lengths for unused bit length codes. * probability, to avoid transmitting the lengths for unused bit length codes.
*/ */
#define Buf_size (8 * 2*sizeof(char))
/* Number of bits used within bi_buf. (bi_buf might be implemented on
* more than 16 bits on some systems.)
*/
/* =========================================================================== /* ===========================================================================
* Local data. These are initialized only once. * Local data. These are initialized only once.
*/ */
@ -152,7 +148,7 @@ local void send_all_trees OF((deflate_state *s, int lcodes, int dcodes,
int blcodes)); int blcodes));
local void compress_block OF((deflate_state *s, ct_data *ltree, local void compress_block OF((deflate_state *s, ct_data *ltree,
ct_data *dtree)); ct_data *dtree));
local void set_data_type OF((deflate_state *s)); local int detect_data_type OF((deflate_state *s));
local unsigned bi_reverse OF((unsigned value, int length)); local unsigned bi_reverse OF((unsigned value, int length));
local void bi_windup OF((deflate_state *s)); local void bi_windup OF((deflate_state *s));
local void bi_flush OF((deflate_state *s)); local void bi_flush OF((deflate_state *s));
@ -203,12 +199,12 @@ local void send_bits(s, value, length)
* unused bits in value. * unused bits in value.
*/ */
if (s->bi_valid > (int)Buf_size - length) { if (s->bi_valid > (int)Buf_size - length) {
s->bi_buf |= (value << s->bi_valid); s->bi_buf |= (ush)value << s->bi_valid;
put_short(s, s->bi_buf); put_short(s, s->bi_buf);
s->bi_buf = (ush)value >> (Buf_size - s->bi_valid); s->bi_buf = (ush)value >> (Buf_size - s->bi_valid);
s->bi_valid += length - Buf_size; s->bi_valid += length - Buf_size;
} else { } else {
s->bi_buf |= value << s->bi_valid; s->bi_buf |= (ush)value << s->bi_valid;
s->bi_valid += length; s->bi_valid += length;
} }
} }
@ -218,12 +214,12 @@ local void send_bits(s, value, length)
{ int len = length;\ { int len = length;\
if (s->bi_valid > (int)Buf_size - len) {\ if (s->bi_valid > (int)Buf_size - len) {\
int val = value;\ int val = value;\
s->bi_buf |= (val << s->bi_valid);\ s->bi_buf |= (ush)val << s->bi_valid;\
put_short(s, s->bi_buf);\ put_short(s, s->bi_buf);\
s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\ s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\
s->bi_valid += len - Buf_size;\ s->bi_valid += len - Buf_size;\
} else {\ } else {\
s->bi_buf |= (value) << s->bi_valid;\ s->bi_buf |= (ush)(value) << s->bi_valid;\
s->bi_valid += len;\ s->bi_valid += len;\
}\ }\
} }
@ -250,11 +246,13 @@ local void tr_static_init()
if (static_init_done) return; if (static_init_done) return;
/* For some embedded targets, global variables are not initialized: */ /* For some embedded targets, global variables are not initialized: */
#ifdef NO_INIT_GLOBAL_POINTERS
static_l_desc.static_tree = static_ltree; static_l_desc.static_tree = static_ltree;
static_l_desc.extra_bits = extra_lbits; static_l_desc.extra_bits = extra_lbits;
static_d_desc.static_tree = static_dtree; static_d_desc.static_tree = static_dtree;
static_d_desc.extra_bits = extra_dbits; static_d_desc.extra_bits = extra_dbits;
static_bl_desc.extra_bits = extra_blbits; static_bl_desc.extra_bits = extra_blbits;
#endif
/* Initialize the mapping length (0..255) -> length code (0..28) */ /* Initialize the mapping length (0..255) -> length code (0..28) */
length = 0; length = 0;
@ -348,13 +346,14 @@ void gen_trees_header()
static_dtree[i].Len, SEPARATOR(i, D_CODES-1, 5)); static_dtree[i].Len, SEPARATOR(i, D_CODES-1, 5));
} }
fprintf(header, "const uch _dist_code[DIST_CODE_LEN] = {\n"); fprintf(header, "const uch ZLIB_INTERNAL _dist_code[DIST_CODE_LEN] = {\n");
for (i = 0; i < DIST_CODE_LEN; i++) { for (i = 0; i < DIST_CODE_LEN; i++) {
fprintf(header, "%2u%s", _dist_code[i], fprintf(header, "%2u%s", _dist_code[i],
SEPARATOR(i, DIST_CODE_LEN-1, 20)); SEPARATOR(i, DIST_CODE_LEN-1, 20));
} }
fprintf(header, "const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {\n"); fprintf(header,
"const uch ZLIB_INTERNAL _length_code[MAX_MATCH-MIN_MATCH+1]= {\n");
for (i = 0; i < MAX_MATCH-MIN_MATCH+1; i++) { for (i = 0; i < MAX_MATCH-MIN_MATCH+1; i++) {
fprintf(header, "%2u%s", _length_code[i], fprintf(header, "%2u%s", _length_code[i],
SEPARATOR(i, MAX_MATCH-MIN_MATCH, 20)); SEPARATOR(i, MAX_MATCH-MIN_MATCH, 20));
@ -379,7 +378,7 @@ void gen_trees_header()
/* =========================================================================== /* ===========================================================================
* Initialize the tree data structures for a new zlib stream. * Initialize the tree data structures for a new zlib stream.
*/ */
void _tr_init(s) void ZLIB_INTERNAL _tr_init(s)
deflate_state *s; deflate_state *s;
{ {
tr_static_init(); tr_static_init();
@ -395,7 +394,6 @@ void _tr_init(s)
s->bi_buf = 0; s->bi_buf = 0;
s->bi_valid = 0; s->bi_valid = 0;
s->last_eob_len = 8; /* enough lookahead for inflate */
#ifdef DEBUG #ifdef DEBUG
s->compressed_len = 0L; s->compressed_len = 0L;
s->bits_sent = 0L; s->bits_sent = 0L;
@ -864,13 +862,13 @@ local void send_all_trees(s, lcodes, dcodes, blcodes)
/* =========================================================================== /* ===========================================================================
* Send a stored block * Send a stored block
*/ */
void _tr_stored_block(s, buf, stored_len, eof) void ZLIB_INTERNAL _tr_stored_block(s, buf, stored_len, last)
deflate_state *s; deflate_state *s;
charf *buf; /* input block */ charf *buf; /* input block */
ulg stored_len; /* length of input block */ ulg stored_len; /* length of input block */
int eof; /* true if this is the last block for a file */ int last; /* one if this is the last block for a file */
{ {
send_bits(s, (STORED_BLOCK<<1)+eof, 3); /* send block type */ send_bits(s, (STORED_BLOCK<<1)+last, 3); /* send block type */
#ifdef DEBUG #ifdef DEBUG
s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L; s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L;
s->compressed_len += (stored_len + 4) << 3; s->compressed_len += (stored_len + 4) << 3;
@ -878,18 +876,20 @@ void _tr_stored_block(s, buf, stored_len, eof)
copy_block(s, buf, (unsigned)stored_len, 1); /* with header */ copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
} }
/* ===========================================================================
* Flush the bits in the bit buffer to pending output (leaves at most 7 bits)
*/
void ZLIB_INTERNAL _tr_flush_bits(s)
deflate_state *s;
{
bi_flush(s);
}
/* =========================================================================== /* ===========================================================================
* Send one empty static block to give enough lookahead for inflate. * Send one empty static block to give enough lookahead for inflate.
* This takes 10 bits, of which 7 may remain in the bit buffer. * This takes 10 bits, of which 7 may remain in the bit buffer.
* The current inflate code requires 9 bits of lookahead. If the
* last two codes for the previous block (real code plus EOB) were coded
* on 5 bits or less, inflate may have only 5+3 bits of lookahead to decode
* the last real code. In this case we send two empty static blocks instead
* of one. (There are no problems if the previous block is stored or fixed.)
* To simplify the code, we assume the worst case of last real code encoded
* on one bit only.
*/ */
void _tr_align(s) void ZLIB_INTERNAL _tr_align(s)
deflate_state *s; deflate_state *s;
{ {
send_bits(s, STATIC_TREES<<1, 3); send_bits(s, STATIC_TREES<<1, 3);
@ -898,31 +898,17 @@ void _tr_align(s)
s->compressed_len += 10L; /* 3 for block type, 7 for EOB */ s->compressed_len += 10L; /* 3 for block type, 7 for EOB */
#endif #endif
bi_flush(s); bi_flush(s);
/* Of the 10 bits for the empty block, we have already sent
* (10 - bi_valid) bits. The lookahead for the last real code (before
* the EOB of the previous block) was thus at least one plus the length
* of the EOB plus what we have just sent of the empty static block.
*/
if (1 + s->last_eob_len + 10 - s->bi_valid < 9) {
send_bits(s, STATIC_TREES<<1, 3);
send_code(s, END_BLOCK, static_ltree);
#ifdef DEBUG
s->compressed_len += 10L;
#endif
bi_flush(s);
}
s->last_eob_len = 7;
} }
/* =========================================================================== /* ===========================================================================
* Determine the best encoding for the current block: dynamic trees, static * Determine the best encoding for the current block: dynamic trees, static
* trees or store, and output the encoded block to the zip file. * trees or store, and output the encoded block to the zip file.
*/ */
void _tr_flush_block(s, buf, stored_len, eof) void ZLIB_INTERNAL _tr_flush_block(s, buf, stored_len, last)
deflate_state *s; deflate_state *s;
charf *buf; /* input block, or NULL if too old */ charf *buf; /* input block, or NULL if too old */
ulg stored_len; /* length of input block */ ulg stored_len; /* length of input block */
int eof; /* true if this is the last block for a file */ int last; /* one if this is the last block for a file */
{ {
ulg opt_lenb, static_lenb; /* opt_len and static_len in bytes */ ulg opt_lenb, static_lenb; /* opt_len and static_len in bytes */
int max_blindex = 0; /* index of last bit length code of non zero freq */ int max_blindex = 0; /* index of last bit length code of non zero freq */
@ -931,8 +917,8 @@ void _tr_flush_block(s, buf, stored_len, eof)
if (s->level > 0) { if (s->level > 0) {
/* Check if the file is binary or text */ /* Check if the file is binary or text */
if (stored_len > 0 && s->strm->data_type == Z_UNKNOWN) if (s->strm->data_type == Z_UNKNOWN)
set_data_type(s); s->strm->data_type = detect_data_type(s);
/* Construct the literal and distance trees */ /* Construct the literal and distance trees */
build_tree(s, (tree_desc *)(&(s->l_desc))); build_tree(s, (tree_desc *)(&(s->l_desc)));
@ -978,20 +964,20 @@ void _tr_flush_block(s, buf, stored_len, eof)
* successful. If LIT_BUFSIZE <= WSIZE, it is never too late to * successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
* transform a block into a stored block. * transform a block into a stored block.
*/ */
_tr_stored_block(s, buf, stored_len, eof); _tr_stored_block(s, buf, stored_len, last);
#ifdef FORCE_STATIC #ifdef FORCE_STATIC
} else if (static_lenb >= 0) { /* force static trees */ } else if (static_lenb >= 0) { /* force static trees */
#else #else
} else if (s->strategy == Z_FIXED || static_lenb == opt_lenb) { } else if (s->strategy == Z_FIXED || static_lenb == opt_lenb) {
#endif #endif
send_bits(s, (STATIC_TREES<<1)+eof, 3); send_bits(s, (STATIC_TREES<<1)+last, 3);
compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree); compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree);
#ifdef DEBUG #ifdef DEBUG
s->compressed_len += 3 + s->static_len; s->compressed_len += 3 + s->static_len;
#endif #endif
} else { } else {
send_bits(s, (DYN_TREES<<1)+eof, 3); send_bits(s, (DYN_TREES<<1)+last, 3);
send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1, send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1,
max_blindex+1); max_blindex+1);
compress_block(s, (ct_data *)s->dyn_ltree, (ct_data *)s->dyn_dtree); compress_block(s, (ct_data *)s->dyn_ltree, (ct_data *)s->dyn_dtree);
@ -1005,21 +991,21 @@ void _tr_flush_block(s, buf, stored_len, eof)
*/ */
init_block(s); init_block(s);
if (eof) { if (last) {
bi_windup(s); bi_windup(s);
#ifdef DEBUG #ifdef DEBUG
s->compressed_len += 7; /* align on byte boundary */ s->compressed_len += 7; /* align on byte boundary */
#endif #endif
} }
Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3, Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3,
s->compressed_len-7*eof)); s->compressed_len-7*last));
} }
/* =========================================================================== /* ===========================================================================
* Save the match info and tally the frequency counts. Return true if * Save the match info and tally the frequency counts. Return true if
* the current block must be flushed. * the current block must be flushed.
*/ */
int _tr_tally (s, dist, lc) int ZLIB_INTERNAL _tr_tally (s, dist, lc)
deflate_state *s; deflate_state *s;
unsigned dist; /* distance of matched string */ unsigned dist; /* distance of matched string */
unsigned lc; /* match length-MIN_MATCH or unmatched char (if dist==0) */ unsigned lc; /* match length-MIN_MATCH or unmatched char (if dist==0) */
@ -1114,28 +1100,48 @@ local void compress_block(s, ltree, dtree)
} while (lx < s->last_lit); } while (lx < s->last_lit);
send_code(s, END_BLOCK, ltree); send_code(s, END_BLOCK, ltree);
s->last_eob_len = ltree[END_BLOCK].Len;
} }
/* =========================================================================== /* ===========================================================================
* Set the data type to BINARY or TEXT, using a crude approximation: * Check if the data type is TEXT or BINARY, using the following algorithm:
* set it to Z_TEXT if all symbols are either printable characters (33 to 255) * - TEXT if the two conditions below are satisfied:
* or white spaces (9 to 13, or 32); or set it to Z_BINARY otherwise. * a) There are no non-portable control characters belonging to the
* "black list" (0..6, 14..25, 28..31).
* b) There is at least one printable character belonging to the
* "white list" (9 {TAB}, 10 {LF}, 13 {CR}, 32..255).
* - BINARY otherwise.
* - The following partially-portable control characters form a
* "gray list" that is ignored in this detection algorithm:
* (7 {BEL}, 8 {BS}, 11 {VT}, 12 {FF}, 26 {SUB}, 27 {ESC}).
* IN assertion: the fields Freq of dyn_ltree are set. * IN assertion: the fields Freq of dyn_ltree are set.
*/ */
local void set_data_type(s) local int detect_data_type(s)
deflate_state *s; deflate_state *s;
{ {
/* black_mask is the bit mask of black-listed bytes
* set bits 0..6, 14..25, and 28..31
* 0xf3ffc07f = binary 11110011111111111100000001111111
*/
unsigned long black_mask = 0xf3ffc07fUL;
int n; int n;
for (n = 0; n < 9; n++) /* Check for non-textual ("black-listed") bytes. */
for (n = 0; n <= 31; n++, black_mask >>= 1)
if ((black_mask & 1) && (s->dyn_ltree[n].Freq != 0))
return Z_BINARY;
/* Check for textual ("white-listed") bytes. */
if (s->dyn_ltree[9].Freq != 0 || s->dyn_ltree[10].Freq != 0
|| s->dyn_ltree[13].Freq != 0)
return Z_TEXT;
for (n = 32; n < LITERALS; n++)
if (s->dyn_ltree[n].Freq != 0) if (s->dyn_ltree[n].Freq != 0)
break; return Z_TEXT;
if (n == 9)
for (n = 14; n < 32; n++) /* There are no "black-listed" or "white-listed" bytes:
if (s->dyn_ltree[n].Freq != 0) * this stream either is empty or has tolerated ("gray-listed") bytes only.
break; */
s->strm->data_type = (n == 32) ? Z_TEXT : Z_BINARY; return Z_BINARY;
} }
/* =========================================================================== /* ===========================================================================
@ -1201,7 +1207,6 @@ local void copy_block(s, buf, len, header)
int header; /* true if block header must be written */ int header; /* true if block header must be written */
{ {
bi_windup(s); /* align on byte boundary */ bi_windup(s); /* align on byte boundary */
s->last_eob_len = 8; /* enough lookahead for inflate */
if (header) { if (header) {
put_short(s, (ush)len); put_short(s, (ush)len);

4
zlib/trees.h
View file

@ -70,7 +70,7 @@ local const ct_data static_dtree[D_CODES] = {
{{19},{ 5}}, {{11},{ 5}}, {{27},{ 5}}, {{ 7},{ 5}}, {{23},{ 5}} {{19},{ 5}}, {{11},{ 5}}, {{27},{ 5}}, {{ 7},{ 5}}, {{23},{ 5}}
}; };
const uch _dist_code[DIST_CODE_LEN] = { const uch ZLIB_INTERNAL _dist_code[DIST_CODE_LEN] = {
0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8,
8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10,
10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
@ -99,7 +99,7 @@ const uch _dist_code[DIST_CODE_LEN] = {
29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29
}; };
const uch _length_code[MAX_MATCH-MIN_MATCH+1]= { const uch ZLIB_INTERNAL _length_code[MAX_MATCH-MIN_MATCH+1]= {
0, 1, 2, 3, 4, 5, 6, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 12, 12, 0, 1, 2, 3, 4, 5, 6, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 12, 12,
13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16,
17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19,

290
zlib/zconf.h
View file

@ -1,5 +1,5 @@
/* zconf.h -- configuration of the zlib compression library /* zconf.h -- configuration of the zlib compression library
* Copyright (C) 1995-2005 Jean-loup Gailly. * Copyright (C) 1995-2012 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -11,52 +11,142 @@
/* /*
* If you *really* need a unique prefix for all types and library functions, * If you *really* need a unique prefix for all types and library functions,
* compile with -DZ_PREFIX. The "standard" zlib should be compiled without it. * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
* Even better than compiling with -DZ_PREFIX would be to use configure to set
* this permanently in zconf.h using "./configure --zprefix".
*/ */
#ifdef Z_PREFIX #ifdef Z_PREFIX /* may be set to #if 1 by ./configure */
# define deflateInit_ z_deflateInit_ # define Z_PREFIX_SET
/* all linked symbols */
# define _dist_code z__dist_code
# define _length_code z__length_code
# define _tr_align z__tr_align
# define _tr_flush_block z__tr_flush_block
# define _tr_init z__tr_init
# define _tr_stored_block z__tr_stored_block
# define _tr_tally z__tr_tally
# define adler32 z_adler32
# define adler32_combine z_adler32_combine
# define adler32_combine64 z_adler32_combine64
# ifndef Z_SOLO
# define compress z_compress
# define compress2 z_compress2
# define compressBound z_compressBound
# endif
# define crc32 z_crc32
# define crc32_combine z_crc32_combine
# define crc32_combine64 z_crc32_combine64
# define deflate z_deflate # define deflate z_deflate
# define deflateEnd z_deflateEnd
# define inflateInit_ z_inflateInit_
# define inflate z_inflate
# define inflateEnd z_inflateEnd
# define deflateInit2_ z_deflateInit2_
# define deflateSetDictionary z_deflateSetDictionary
# define deflateCopy z_deflateCopy
# define deflateReset z_deflateReset
# define deflateParams z_deflateParams
# define deflateBound z_deflateBound # define deflateBound z_deflateBound
# define deflateCopy z_deflateCopy
# define deflateEnd z_deflateEnd
# define deflateInit2_ z_deflateInit2_
# define deflateInit_ z_deflateInit_
# define deflateParams z_deflateParams
# define deflatePending z_deflatePending
# define deflatePrime z_deflatePrime # define deflatePrime z_deflatePrime
# define deflateReset z_deflateReset
# define deflateResetKeep z_deflateResetKeep
# define deflateSetDictionary z_deflateSetDictionary
# define deflateSetHeader z_deflateSetHeader
# define deflateTune z_deflateTune
# define deflate_copyright z_deflate_copyright
# define get_crc_table z_get_crc_table
# ifndef Z_SOLO
# define gz_error z_gz_error
# define gz_intmax z_gz_intmax
# define gz_strwinerror z_gz_strwinerror
# define gzbuffer z_gzbuffer
# define gzclearerr z_gzclearerr
# define gzclose z_gzclose
# define gzclose_r z_gzclose_r
# define gzclose_w z_gzclose_w
# define gzdirect z_gzdirect
# define gzdopen z_gzdopen
# define gzeof z_gzeof
# define gzerror z_gzerror
# define gzflush z_gzflush
# define gzgetc z_gzgetc
# define gzgetc_ z_gzgetc_
# define gzgets z_gzgets
# define gzoffset z_gzoffset
# define gzoffset64 z_gzoffset64
# define gzopen z_gzopen
# define gzopen64 z_gzopen64
# ifdef _WIN32
# define gzopen_w z_gzopen_w
# endif
# define gzprintf z_gzprintf
# define gzputc z_gzputc
# define gzputs z_gzputs
# define gzread z_gzread
# define gzrewind z_gzrewind
# define gzseek z_gzseek
# define gzseek64 z_gzseek64
# define gzsetparams z_gzsetparams
# define gztell z_gztell
# define gztell64 z_gztell64
# define gzungetc z_gzungetc
# define gzwrite z_gzwrite
# endif
# define inflate z_inflate
# define inflateBack z_inflateBack
# define inflateBackEnd z_inflateBackEnd
# define inflateBackInit_ z_inflateBackInit_
# define inflateCopy z_inflateCopy
# define inflateEnd z_inflateEnd
# define inflateGetHeader z_inflateGetHeader
# define inflateInit2_ z_inflateInit2_ # define inflateInit2_ z_inflateInit2_
# define inflateInit_ z_inflateInit_
# define inflateMark z_inflateMark
# define inflatePrime z_inflatePrime
# define inflateReset z_inflateReset
# define inflateReset2 z_inflateReset2
# define inflateSetDictionary z_inflateSetDictionary # define inflateSetDictionary z_inflateSetDictionary
# define inflateSync z_inflateSync # define inflateSync z_inflateSync
# define inflateSyncPoint z_inflateSyncPoint # define inflateSyncPoint z_inflateSyncPoint
# define inflateCopy z_inflateCopy # define inflateUndermine z_inflateUndermine
# define inflateReset z_inflateReset # define inflateResetKeep z_inflateResetKeep
# define inflateBack z_inflateBack # define inflate_copyright z_inflate_copyright
# define inflateBackEnd z_inflateBackEnd # define inflate_fast z_inflate_fast
# define compress z_compress # define inflate_table z_inflate_table
# define compress2 z_compress2 # ifndef Z_SOLO
# define compressBound z_compressBound # define uncompress z_uncompress
# define uncompress z_uncompress # endif
# define adler32 z_adler32
# define crc32 z_crc32
# define get_crc_table z_get_crc_table
# define zError z_zError # define zError z_zError
# ifndef Z_SOLO
# define zcalloc z_zcalloc
# define zcfree z_zcfree
# endif
# define zlibCompileFlags z_zlibCompileFlags
# define zlibVersion z_zlibVersion
# define alloc_func z_alloc_func /* all zlib typedefs in zlib.h and zconf.h */
# define free_func z_free_func
# define in_func z_in_func
# define out_func z_out_func
# define Byte z_Byte # define Byte z_Byte
# define uInt z_uInt
# define uLong z_uLong
# define Bytef z_Bytef # define Bytef z_Bytef
# define alloc_func z_alloc_func
# define charf z_charf # define charf z_charf
# define free_func z_free_func
# ifndef Z_SOLO
# define gzFile z_gzFile
# endif
# define gz_header z_gz_header
# define gz_headerp z_gz_headerp
# define in_func z_in_func
# define intf z_intf # define intf z_intf
# define out_func z_out_func
# define uInt z_uInt
# define uIntf z_uIntf # define uIntf z_uIntf
# define uLong z_uLong
# define uLongf z_uLongf # define uLongf z_uLongf
# define voidpf z_voidpf
# define voidp z_voidp # define voidp z_voidp
# define voidpc z_voidpc
# define voidpf z_voidpf
/* all zlib structs in zlib.h and zconf.h */
# define gz_header_s z_gz_header_s
# define internal_state z_internal_state
#endif #endif
#if defined(__MSDOS__) && !defined(MSDOS) #if defined(__MSDOS__) && !defined(MSDOS)
@ -125,6 +215,12 @@
# endif # endif
#endif #endif
#if defined(ZLIB_CONST) && !defined(z_const)
# define z_const const
#else
# define z_const
#endif
/* Some Mac compilers merge all .h files incorrectly: */ /* Some Mac compilers merge all .h files incorrectly: */
#if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__) #if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__)
# define NO_DUMMY_DECL # define NO_DUMMY_DECL
@ -171,6 +267,14 @@
# endif # endif
#endif #endif
#ifndef Z_ARG /* function prototypes for stdarg */
# if defined(STDC) || defined(Z_HAVE_STDARG_H)
# define Z_ARG(args) args
# else
# define Z_ARG(args) ()
# endif
#endif
/* The following definitions for FAR are needed only for MSDOS mixed /* The following definitions for FAR are needed only for MSDOS mixed
* model programming (small or medium model with some far allocations). * model programming (small or medium model with some far allocations).
* This was tested only with MSC; for other MSDOS compilers you may have * This was tested only with MSC; for other MSDOS compilers you may have
@ -284,49 +388,119 @@ typedef uLong FAR uLongf;
typedef Byte *voidp; typedef Byte *voidp;
#endif #endif
#if 0 /* HAVE_UNISTD_H -- this line is updated by ./configure */ /* ./configure may #define Z_U4 here */
# include <sys/types.h> /* for off_t */
# include <unistd.h> /* for SEEK_* and off_t */ #if !defined(Z_U4) && !defined(Z_SOLO) && defined(STDC)
# ifdef VMS # include <limits.h>
# include <unixio.h> /* for off_t */ # if (UINT_MAX == 0xffffffffUL)
# define Z_U4 unsigned
# else
# if (ULONG_MAX == 0xffffffffUL)
# define Z_U4 unsigned long
# else
# if (USHRT_MAX == 0xffffffffUL)
# define Z_U4 unsigned short
# endif
# endif
# endif # endif
# define z_off_t off_t
#endif #endif
#ifndef SEEK_SET
#ifdef Z_U4
typedef Z_U4 z_crc_t;
#else
typedef unsigned long z_crc_t;
#endif
#ifdef HAVE_UNISTD_H /* may be set to #if 1 by ./configure */
# define Z_HAVE_UNISTD_H
#endif
#ifdef HAVE_STDARG_H /* may be set to #if 1 by ./configure */
# define Z_HAVE_STDARG_H
#endif
#ifdef STDC
# ifndef Z_SOLO
# include <sys/types.h> /* for off_t */
# endif
#endif
#ifdef _WIN32
# include <stddef.h> /* for wchar_t */
#endif
/* a little trick to accommodate both "#define _LARGEFILE64_SOURCE" and
* "#define _LARGEFILE64_SOURCE 1" as requesting 64-bit operations, (even
* though the former does not conform to the LFS document), but considering
* both "#undef _LARGEFILE64_SOURCE" and "#define _LARGEFILE64_SOURCE 0" as
* equivalently requesting no 64-bit operations
*/
#if defined(LARGEFILE64_SOURCE) && -_LARGEFILE64_SOURCE - -1 == 1
# undef _LARGEFILE64_SOURCE
#endif
#if defined(__WATCOMC__) && !defined(Z_HAVE_UNISTD_H)
# define Z_HAVE_UNISTD_H
#endif
#ifndef Z_SOLO
# if defined(Z_HAVE_UNISTD_H) || defined(LARGEFILE64_SOURCE)
# include <unistd.h> /* for SEEK_*, off_t, and _LFS64_LARGEFILE */
# ifdef VMS
# include <unixio.h> /* for off_t */
# endif
# ifndef z_off_t
# define z_off_t off_t
# endif
# endif
#endif
#if defined(_LFS64_LARGEFILE) && _LFS64_LARGEFILE-0
# define Z_LFS64
#endif
#if defined(_LARGEFILE64_SOURCE) && defined(Z_LFS64)
# define Z_LARGE64
#endif
#if defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS-0 == 64 && defined(Z_LFS64)
# define Z_WANT64
#endif
#if !defined(SEEK_SET) && !defined(Z_SOLO)
# define SEEK_SET 0 /* Seek from beginning of file. */ # define SEEK_SET 0 /* Seek from beginning of file. */
# define SEEK_CUR 1 /* Seek from current position. */ # define SEEK_CUR 1 /* Seek from current position. */
# define SEEK_END 2 /* Set file pointer to EOF plus "offset" */ # define SEEK_END 2 /* Set file pointer to EOF plus "offset" */
#endif #endif
#ifndef z_off_t #ifndef z_off_t
# define z_off_t long # define z_off_t long
#endif #endif
#if defined(__OS400__) #if !defined(_WIN32) && defined(Z_LARGE64)
# define NO_vsnprintf # define z_off64_t off64_t
#endif #else
# if defined(_WIN32) && !defined(__GNUC__) && !defined(Z_SOLO)
#if defined(__MVS__) # define z_off64_t __int64
# define NO_vsnprintf # else
# ifdef FAR # define z_off64_t z_off_t
# undef FAR
# endif # endif
#endif #endif
/* MVS linker does not support external names larger than 8 bytes */ /* MVS linker does not support external names larger than 8 bytes */
#if defined(__MVS__) #if defined(__MVS__)
# pragma map(deflateInit_,"DEIN") #pragma map(deflateInit_,"DEIN")
# pragma map(deflateInit2_,"DEIN2") #pragma map(deflateInit2_,"DEIN2")
# pragma map(deflateEnd,"DEEND") #pragma map(deflateEnd,"DEEND")
# pragma map(deflateBound,"DEBND") #pragma map(deflateBound,"DEBND")
# pragma map(inflateInit_,"ININ") #pragma map(inflateInit_,"ININ")
# pragma map(inflateInit2_,"ININ2") #pragma map(inflateInit2_,"ININ2")
# pragma map(inflateEnd,"INEND") #pragma map(inflateEnd,"INEND")
# pragma map(inflateSync,"INSY") #pragma map(inflateSync,"INSY")
# pragma map(inflateSetDictionary,"INSEDI") #pragma map(inflateSetDictionary,"INSEDI")
# pragma map(compressBound,"CMBND") #pragma map(compressBound,"CMBND")
# pragma map(inflate_table,"INTABL") #pragma map(inflate_table,"INTABL")
# pragma map(inflate_fast,"INFA") #pragma map(inflate_fast,"INFA")
# pragma map(inflate_copyright,"INCOPY") #pragma map(inflate_copyright,"INCOPY")
#endif #endif
#endif /* ZCONF_H */ #endif /* ZCONF_H */

1331
zlib/zlib.h
View file

File diff suppressed because it is too large Load diff

54
zlib/zutil.c
View file

@ -1,11 +1,14 @@
/* zutil.c -- target dependent utility functions for the compression library /* zutil.c -- target dependent utility functions for the compression library
* Copyright (C) 1995-2005 Jean-loup Gailly. * Copyright (C) 1995-2005, 2010, 2011, 2012 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
/* @(#) $Id$ */ /* @(#) $Id$ */
#include "zutil.h" #include "zutil.h"
#ifndef Z_SOLO
# include "gzguts.h"
#endif
#ifndef NO_DUMMY_DECL #ifndef NO_DUMMY_DECL
struct internal_state {int dummy;}; /* for buggy compilers */ struct internal_state {int dummy;}; /* for buggy compilers */
@ -34,25 +37,25 @@ uLong ZEXPORT zlibCompileFlags()
uLong flags; uLong flags;
flags = 0; flags = 0;
switch (sizeof(uInt)) { switch ((int)(sizeof(uInt))) {
case 2: break; case 2: break;
case 4: flags += 1; break; case 4: flags += 1; break;
case 8: flags += 2; break; case 8: flags += 2; break;
default: flags += 3; default: flags += 3;
} }
switch (sizeof(uLong)) { switch ((int)(sizeof(uLong))) {
case 2: break; case 2: break;
case 4: flags += 1 << 2; break; case 4: flags += 1 << 2; break;
case 8: flags += 2 << 2; break; case 8: flags += 2 << 2; break;
default: flags += 3 << 2; default: flags += 3 << 2;
} }
switch (sizeof(voidpf)) { switch ((int)(sizeof(voidpf))) {
case 2: break; case 2: break;
case 4: flags += 1 << 4; break; case 4: flags += 1 << 4; break;
case 8: flags += 2 << 4; break; case 8: flags += 2 << 4; break;
default: flags += 3 << 4; default: flags += 3 << 4;
} }
switch (sizeof(z_off_t)) { switch ((int)(sizeof(z_off_t))) {
case 2: break; case 2: break;
case 4: flags += 1 << 6; break; case 4: flags += 1 << 6; break;
case 8: flags += 2 << 6; break; case 8: flags += 2 << 6; break;
@ -85,27 +88,27 @@ uLong ZEXPORT zlibCompileFlags()
#ifdef FASTEST #ifdef FASTEST
flags += 1L << 21; flags += 1L << 21;
#endif #endif
#ifdef STDC #if defined(STDC) || defined(Z_HAVE_STDARG_H)
# ifdef NO_vsnprintf # ifdef NO_vsnprintf
flags += 1L << 25; flags += 1L << 25;
# ifdef HAS_vsprintf_void # ifdef HAS_vsprintf_void
flags += 1L << 26; flags += 1L << 26;
# endif # endif
# else # else
# ifdef HAS_vsnprintf_void # ifdef HAS_vsnprintf_void
flags += 1L << 26; flags += 1L << 26;
# endif # endif
# endif # endif
#else #else
flags += 1L << 24; flags += 1L << 24;
# ifdef NO_snprintf # ifdef NO_snprintf
flags += 1L << 25; flags += 1L << 25;
# ifdef HAS_sprintf_void # ifdef HAS_sprintf_void
flags += 1L << 26; flags += 1L << 26;
# endif # endif
# else # else
# ifdef HAS_snprintf_void # ifdef HAS_snprintf_void
flags += 1L << 26; flags += 1L << 26;
# endif # endif
# endif # endif
#endif #endif
@ -117,9 +120,9 @@ uLong ZEXPORT zlibCompileFlags()
# ifndef verbose # ifndef verbose
# define verbose 0 # define verbose 0
# endif # endif
int z_verbose = verbose; int ZLIB_INTERNAL z_verbose = verbose;
void z_error (m) void ZLIB_INTERNAL z_error (m)
char *m; char *m;
{ {
fprintf(stderr, "%s\n", m); fprintf(stderr, "%s\n", m);
@ -146,7 +149,7 @@ const char * ZEXPORT zError(err)
#ifndef HAVE_MEMCPY #ifndef HAVE_MEMCPY
void zmemcpy(dest, source, len) void ZLIB_INTERNAL zmemcpy(dest, source, len)
Bytef* dest; Bytef* dest;
const Bytef* source; const Bytef* source;
uInt len; uInt len;
@ -157,7 +160,7 @@ void zmemcpy(dest, source, len)
} while (--len != 0); } while (--len != 0);
} }
int zmemcmp(s1, s2, len) int ZLIB_INTERNAL zmemcmp(s1, s2, len)
const Bytef* s1; const Bytef* s1;
const Bytef* s2; const Bytef* s2;
uInt len; uInt len;
@ -170,7 +173,7 @@ int zmemcmp(s1, s2, len)
return 0; return 0;
} }
void zmemzero(dest, len) void ZLIB_INTERNAL zmemzero(dest, len)
Bytef* dest; Bytef* dest;
uInt len; uInt len;
{ {
@ -181,6 +184,7 @@ void zmemzero(dest, len)
} }
#endif #endif
#ifndef Z_SOLO
#ifdef SYS16BIT #ifdef SYS16BIT
@ -213,7 +217,7 @@ local ptr_table table[MAX_PTR];
* a protected system like OS/2. Use Microsoft C instead. * a protected system like OS/2. Use Microsoft C instead.
*/ */
voidpf zcalloc (voidpf opaque, unsigned items, unsigned size) voidpf ZLIB_INTERNAL zcalloc (voidpf opaque, unsigned items, unsigned size)
{ {
voidpf buf = opaque; /* just to make some compilers happy */ voidpf buf = opaque; /* just to make some compilers happy */
ulg bsize = (ulg)items*size; ulg bsize = (ulg)items*size;
@ -237,7 +241,7 @@ voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
return buf; return buf;
} }
void zcfree (voidpf opaque, voidpf ptr) void ZLIB_INTERNAL zcfree (voidpf opaque, voidpf ptr)
{ {
int n; int n;
if (*(ush*)&ptr != 0) { /* object < 64K */ if (*(ush*)&ptr != 0) { /* object < 64K */
@ -272,13 +276,13 @@ void zcfree (voidpf opaque, voidpf ptr)
# define _hfree hfree # define _hfree hfree
#endif #endif
voidpf zcalloc (voidpf opaque, unsigned items, unsigned size) voidpf ZLIB_INTERNAL zcalloc (voidpf opaque, uInt items, uInt size)
{ {
if (opaque) opaque = 0; /* to make compiler happy */ if (opaque) opaque = 0; /* to make compiler happy */
return _halloc((long)items, size); return _halloc((long)items, size);
} }
void zcfree (voidpf opaque, voidpf ptr) void ZLIB_INTERNAL zcfree (voidpf opaque, voidpf ptr)
{ {
if (opaque) opaque = 0; /* to make compiler happy */ if (opaque) opaque = 0; /* to make compiler happy */
_hfree(ptr); _hfree(ptr);
@ -297,7 +301,7 @@ extern voidp calloc OF((uInt items, uInt size));
extern void free OF((voidpf ptr)); extern void free OF((voidpf ptr));
#endif #endif
voidpf zcalloc (opaque, items, size) voidpf ZLIB_INTERNAL zcalloc (opaque, items, size)
voidpf opaque; voidpf opaque;
unsigned items; unsigned items;
unsigned size; unsigned size;
@ -307,7 +311,7 @@ voidpf zcalloc (opaque, items, size)
(voidpf)calloc(items, size); (voidpf)calloc(items, size);
} }
void zcfree (opaque, ptr) void ZLIB_INTERNAL zcfree (opaque, ptr)
voidpf opaque; voidpf opaque;
voidpf ptr; voidpf ptr;
{ {
@ -316,3 +320,5 @@ void zcfree (opaque, ptr)
} }
#endif /* MY_ZCALLOC */ #endif /* MY_ZCALLOC */
#endif /* !Z_SOLO */

137
zlib/zutil.h
View file

@ -1,5 +1,5 @@
/* zutil.h -- internal interface and configuration of the compression library /* zutil.h -- internal interface and configuration of the compression library
* Copyright (C) 1995-2005 Jean-loup Gailly. * Copyright (C) 1995-2012 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -13,30 +13,24 @@
#ifndef ZUTIL_H #ifndef ZUTIL_H
#define ZUTIL_H #define ZUTIL_H
#define ZLIB_INTERNAL #ifdef HAVE_HIDDEN
# define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
#else
# define ZLIB_INTERNAL
#endif
#include "zlib.h" #include "zlib.h"
#ifdef STDC #if defined(STDC) && !defined(Z_SOLO)
# ifndef _WIN32_WCE # if !(defined(_WIN32_WCE) && defined(_MSC_VER))
# include <stddef.h> # include <stddef.h>
# endif # endif
# include <string.h> # include <string.h>
# include <stdlib.h> # include <stdlib.h>
#endif #endif
#ifdef NO_ERRNO_H
# ifdef _WIN32_WCE #ifdef Z_SOLO
/* The Microsoft C Run-Time Library for Windows CE doesn't have typedef long ptrdiff_t; /* guess -- will be caught if guess is wrong */
* errno. We define it as a global variable to simplify porting.
* Its value is always 0 and should not be used. We rename it to
* avoid conflict with other libraries that use the same workaround.
*/
# define errno z_errno
# endif
extern int errno;
#else
# ifndef _WIN32_WCE
# include <errno.h>
# endif
#endif #endif
#ifndef local #ifndef local
@ -88,16 +82,18 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32)) #if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
# define OS_CODE 0x00 # define OS_CODE 0x00
# if defined(__TURBOC__) || defined(__BORLANDC__) # ifndef Z_SOLO
# if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) # if defined(__TURBOC__) || defined(__BORLANDC__)
/* Allow compilation with ANSI keywords only enabled */ # if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
void _Cdecl farfree( void *block ); /* Allow compilation with ANSI keywords only enabled */
void *_Cdecl farmalloc( unsigned long nbytes ); void _Cdecl farfree( void *block );
# else void *_Cdecl farmalloc( unsigned long nbytes );
# include <alloc.h> # else
# include <alloc.h>
# endif
# else /* MSC or DJGPP */
# include <malloc.h>
# endif # endif
# else /* MSC or DJGPP */
# include <malloc.h>
# endif # endif
#endif #endif
@ -117,18 +113,20 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
#ifdef OS2 #ifdef OS2
# define OS_CODE 0x06 # define OS_CODE 0x06
# ifdef M_I86 # if defined(M_I86) && !defined(Z_SOLO)
#include <malloc.h> # include <malloc.h>
# endif # endif
#endif #endif
#if defined(MACOS) || defined(TARGET_OS_MAC) #if defined(MACOS) || defined(TARGET_OS_MAC)
# define OS_CODE 0x07 # define OS_CODE 0x07
# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os # ifndef Z_SOLO
# include <unix.h> /* for fdopen */ # if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
# else # include <unix.h> /* for fdopen */
# ifndef fdopen # else
# define fdopen(fd,mode) NULL /* No fdopen() */ # ifndef fdopen
# define fdopen(fd,mode) NULL /* No fdopen() */
# endif
# endif # endif
# endif # endif
#endif #endif
@ -151,7 +149,7 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
# define fdopen(fd,mode) NULL /* No fdopen() */ # define fdopen(fd,mode) NULL /* No fdopen() */
#endif #endif
#if (defined(_MSC_VER) && (_MSC_VER > 600)) #if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX
# if defined(_WIN32_WCE) # if defined(_WIN32_WCE)
# define fdopen(fd,mode) NULL /* No fdopen() */ # define fdopen(fd,mode) NULL /* No fdopen() */
# ifndef _PTRDIFF_T_DEFINED # ifndef _PTRDIFF_T_DEFINED
@ -163,6 +161,18 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
# endif # endif
#endif #endif
#if defined(__BORLANDC__) && !defined(MSDOS)
#pragma warn -8004
#pragma warn -8008
#pragma warn -8066
#endif
/* provide prototypes for these when building zlib without LFS */
#if !defined(_WIN32) && (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
#endif
/* common defaults */ /* common defaults */
#ifndef OS_CODE #ifndef OS_CODE
@ -175,40 +185,7 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
/* functions */ /* functions */
#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550) #if defined(pyr) || defined(Z_SOLO)
# ifndef HAVE_VSNPRINTF
# define HAVE_VSNPRINTF
# endif
#endif
#if defined(__CYGWIN__)
# ifndef HAVE_VSNPRINTF
# define HAVE_VSNPRINTF
# endif
#endif
#ifndef HAVE_VSNPRINTF
# ifdef MSDOS
/* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
but for now we just assume it doesn't. */
# define NO_vsnprintf
# endif
# ifdef __TURBOC__
# define NO_vsnprintf
# endif
# ifdef WIN32
/* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
# if !defined(vsnprintf) && !defined(NO_vsnprintf)
# define vsnprintf _vsnprintf
# endif
# endif
# ifdef __SASC
# define NO_vsnprintf
# endif
#endif
#ifdef VMS
# define NO_vsnprintf
#endif
#if defined(pyr)
# define NO_MEMCPY # define NO_MEMCPY
#endif #endif
#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) #if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
@ -232,16 +209,16 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
# define zmemzero(dest, len) memset(dest, 0, len) # define zmemzero(dest, len) memset(dest, 0, len)
# endif # endif
#else #else
extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
extern void zmemzero OF((Bytef* dest, uInt len)); void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len));
#endif #endif
/* Diagnostic functions */ /* Diagnostic functions */
#ifdef DEBUG #ifdef DEBUG
# include <stdio.h> # include <stdio.h>
extern int z_verbose; extern int ZLIB_INTERNAL z_verbose;
extern void z_error OF((char *m)); extern void ZLIB_INTERNAL z_error OF((char *m));
# define Assert(cond,msg) {if(!(cond)) z_error(msg);} # define Assert(cond,msg) {if(!(cond)) z_error(msg);}
# define Trace(x) {if (z_verbose>=0) fprintf x ;} # define Trace(x) {if (z_verbose>=0) fprintf x ;}
# define Tracev(x) {if (z_verbose>0) fprintf x ;} # define Tracev(x) {if (z_verbose>0) fprintf x ;}
@ -257,13 +234,19 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
# define Tracecv(c,x) # define Tracecv(c,x)
#endif #endif
#ifndef Z_SOLO
voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size)); voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
void zcfree OF((voidpf opaque, voidpf ptr)); unsigned size));
void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr));
#endif
#define ZALLOC(strm, items, size) \ #define ZALLOC(strm, items, size) \
(*((strm)->zalloc))((strm)->opaque, (items), (size)) (*((strm)->zalloc))((strm)->opaque, (items), (size))
#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
#define TRY_FREE(s, p) {if (p) ZFREE(s, p);} #define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
/* Reverse the bytes in a 32-bit value */
#define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
(((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
#endif /* ZUTIL_H */ #endif /* ZUTIL_H */