Add gitignore file
This commit is contained in:
parent
3b8e4ed9c9
commit
e6ca2dd14a
1
.gitignore
vendored
Normal file
1
.gitignore
vendored
Normal file
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.DS_Store
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480
vorbis-tremor-ios/vorbis-tremor-ios.xcodeproj/project.pbxproj
Executable file
480
vorbis-tremor-ios/vorbis-tremor-ios.xcodeproj/project.pbxproj
Executable file
@ -0,0 +1,480 @@
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// !$*UTF8*$!
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{
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archiveVersion = 1;
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classes = {
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};
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objectVersion = 46;
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179
zlib-1.2.8/adler32.c
Executable file
179
zlib-1.2.8/adler32.c
Executable file
@ -0,0 +1,179 @@
|
||||
/* adler32.c -- compute the Adler-32 checksum of a data stream
|
||||
* Copyright (C) 1995-2011 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/* @(#) $Id$ */
|
||||
|
||||
#include "zutil.h"
|
||||
|
||||
#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
|
||||
/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
|
||||
|
||||
#define DO1(buf,i) {adler += (buf)[i]; sum2 += adler;}
|
||||
#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);
|
||||
#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);
|
||||
#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
|
||||
#define DO16(buf) DO8(buf,0); DO8(buf,8);
|
||||
|
||||
/* use NO_DIVIDE if your processor does not do division in hardware --
|
||||
try it both ways to see which is faster */
|
||||
#ifdef NO_DIVIDE
|
||||
/* note that this assumes BASE is 65521, where 65536 % 65521 == 15
|
||||
(thank you to John Reiser for pointing this out) */
|
||||
# define CHOP(a) \
|
||||
do { \
|
||||
unsigned long tmp = a >> 16; \
|
||||
a &= 0xffffUL; \
|
||||
a += (tmp << 4) - tmp; \
|
||||
} while (0)
|
||||
# define MOD28(a) \
|
||||
do { \
|
||||
CHOP(a); \
|
||||
if (a >= BASE) a -= BASE; \
|
||||
} while (0)
|
||||
# define MOD(a) \
|
||||
do { \
|
||||
CHOP(a); \
|
||||
MOD28(a); \
|
||||
} while (0)
|
||||
# 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; \
|
||||
} while (0)
|
||||
#else
|
||||
# define MOD(a) a %= BASE
|
||||
# define MOD28(a) a %= BASE
|
||||
# define MOD63(a) a %= BASE
|
||||
#endif
|
||||
|
||||
/* ========================================================================= */
|
||||
uLong ZEXPORT adler32(adler, buf, len)
|
||||
uLong adler;
|
||||
const Bytef *buf;
|
||||
uInt len;
|
||||
{
|
||||
unsigned long sum2;
|
||||
unsigned n;
|
||||
|
||||
/* split Adler-32 into component sums */
|
||||
sum2 = (adler >> 16) & 0xffff;
|
||||
adler &= 0xffff;
|
||||
|
||||
/* in case user likes doing a byte at a time, keep it fast */
|
||||
if (len == 1) {
|
||||
adler += buf[0];
|
||||
if (adler >= BASE)
|
||||
adler -= BASE;
|
||||
sum2 += adler;
|
||||
if (sum2 >= BASE)
|
||||
sum2 -= BASE;
|
||||
return adler | (sum2 << 16);
|
||||
}
|
||||
|
||||
/* initial Adler-32 value (deferred check for len == 1 speed) */
|
||||
if (buf == Z_NULL)
|
||||
return 1L;
|
||||
|
||||
/* in case short lengths are provided, keep it somewhat fast */
|
||||
if (len < 16) {
|
||||
while (len--) {
|
||||
adler += *buf++;
|
||||
sum2 += adler;
|
||||
}
|
||||
if (adler >= BASE)
|
||||
adler -= BASE;
|
||||
MOD28(sum2); /* only added so many BASE's */
|
||||
return adler | (sum2 << 16);
|
||||
}
|
||||
|
||||
/* do length NMAX blocks -- requires just one modulo operation */
|
||||
while (len >= NMAX) {
|
||||
len -= NMAX;
|
||||
n = NMAX / 16; /* NMAX is divisible by 16 */
|
||||
do {
|
||||
DO16(buf); /* 16 sums unrolled */
|
||||
buf += 16;
|
||||
} while (--n);
|
||||
MOD(adler);
|
||||
MOD(sum2);
|
||||
}
|
||||
|
||||
/* do remaining bytes (less than NMAX, still just one modulo) */
|
||||
if (len) { /* avoid modulos if none remaining */
|
||||
while (len >= 16) {
|
||||
len -= 16;
|
||||
DO16(buf);
|
||||
buf += 16;
|
||||
}
|
||||
while (len--) {
|
||||
adler += *buf++;
|
||||
sum2 += adler;
|
||||
}
|
||||
MOD(adler);
|
||||
MOD(sum2);
|
||||
}
|
||||
|
||||
/* return recombined sums */
|
||||
return adler | (sum2 << 16);
|
||||
}
|
||||
|
||||
/* ========================================================================= */
|
||||
local uLong adler32_combine_(adler1, adler2, len2)
|
||||
uLong adler1;
|
||||
uLong adler2;
|
||||
z_off64_t len2;
|
||||
{
|
||||
unsigned long sum1;
|
||||
unsigned long sum2;
|
||||
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 */
|
||||
MOD63(len2); /* assumes len2 >= 0 */
|
||||
rem = (unsigned)len2;
|
||||
sum1 = adler1 & 0xffff;
|
||||
sum2 = rem * sum1;
|
||||
MOD(sum2);
|
||||
sum1 += (adler2 & 0xffff) + BASE - 1;
|
||||
sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem;
|
||||
if (sum1 >= BASE) sum1 -= BASE;
|
||||
if (sum1 >= BASE) sum1 -= BASE;
|
||||
if (sum2 >= (BASE << 1)) sum2 -= (BASE << 1);
|
||||
if (sum2 >= BASE) sum2 -= BASE;
|
||||
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);
|
||||
}
|
||||
80
zlib-1.2.8/compress.c
Executable file
80
zlib-1.2.8/compress.c
Executable file
@ -0,0 +1,80 @@
|
||||
/* compress.c -- compress a memory buffer
|
||||
* Copyright (C) 1995-2005 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/* @(#) $Id$ */
|
||||
|
||||
#define ZLIB_INTERNAL
|
||||
#include "zlib.h"
|
||||
|
||||
/* ===========================================================================
|
||||
Compresses the source buffer into the destination buffer. The level
|
||||
parameter has the same meaning as in deflateInit. sourceLen is the byte
|
||||
length of the source buffer. Upon entry, destLen is the total size of the
|
||||
destination buffer, which must be at least 0.1% larger than sourceLen plus
|
||||
12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
|
||||
|
||||
compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
|
||||
memory, Z_BUF_ERROR if there was not enough room in the output buffer,
|
||||
Z_STREAM_ERROR if the level parameter is invalid.
|
||||
*/
|
||||
int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
|
||||
Bytef *dest;
|
||||
uLongf *destLen;
|
||||
const Bytef *source;
|
||||
uLong sourceLen;
|
||||
int level;
|
||||
{
|
||||
z_stream stream;
|
||||
int err;
|
||||
|
||||
stream.next_in = (z_const Bytef *)source;
|
||||
stream.avail_in = (uInt)sourceLen;
|
||||
#ifdef MAXSEG_64K
|
||||
/* Check for source > 64K on 16-bit machine: */
|
||||
if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
|
||||
#endif
|
||||
stream.next_out = dest;
|
||||
stream.avail_out = (uInt)*destLen;
|
||||
if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
|
||||
|
||||
stream.zalloc = (alloc_func)0;
|
||||
stream.zfree = (free_func)0;
|
||||
stream.opaque = (voidpf)0;
|
||||
|
||||
err = deflateInit(&stream, level);
|
||||
if (err != Z_OK) return err;
|
||||
|
||||
err = deflate(&stream, Z_FINISH);
|
||||
if (err != Z_STREAM_END) {
|
||||
deflateEnd(&stream);
|
||||
return err == Z_OK ? Z_BUF_ERROR : err;
|
||||
}
|
||||
*destLen = stream.total_out;
|
||||
|
||||
err = deflateEnd(&stream);
|
||||
return err;
|
||||
}
|
||||
|
||||
/* ===========================================================================
|
||||
*/
|
||||
int ZEXPORT compress (dest, destLen, source, sourceLen)
|
||||
Bytef *dest;
|
||||
uLongf *destLen;
|
||||
const Bytef *source;
|
||||
uLong sourceLen;
|
||||
{
|
||||
return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
|
||||
}
|
||||
|
||||
/* ===========================================================================
|
||||
If the default memLevel or windowBits for deflateInit() is changed, then
|
||||
this function needs to be updated.
|
||||
*/
|
||||
uLong ZEXPORT compressBound (sourceLen)
|
||||
uLong sourceLen;
|
||||
{
|
||||
return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) +
|
||||
(sourceLen >> 25) + 13;
|
||||
}
|
||||
425
zlib-1.2.8/crc32.c
Executable file
425
zlib-1.2.8/crc32.c
Executable file
@ -0,0 +1,425 @@
|
||||
/* crc32.c -- compute the CRC-32 of a data stream
|
||||
* Copyright (C) 1995-2006, 2010, 2011, 2012 Mark Adler
|
||||
* 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
|
||||
* CRC methods: exclusive-oring 32 bits of data at a time, and pre-computing
|
||||
* tables for updating the shift register in one step with three exclusive-ors
|
||||
* instead of four steps with four exclusive-ors. This results in about a
|
||||
* factor of two increase in speed on a Power PC G4 (PPC7455) using gcc -O3.
|
||||
*/
|
||||
|
||||
/* @(#) $Id$ */
|
||||
|
||||
/*
|
||||
Note on the use of DYNAMIC_CRC_TABLE: there is no mutex or semaphore
|
||||
protection on the static variables used to control the first-use generation
|
||||
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
|
||||
one thread to use crc32().
|
||||
|
||||
DYNAMIC_CRC_TABLE and MAKECRCH can be #defined to write out crc32.h.
|
||||
*/
|
||||
|
||||
#ifdef MAKECRCH
|
||||
# include <stdio.h>
|
||||
# ifndef DYNAMIC_CRC_TABLE
|
||||
# define DYNAMIC_CRC_TABLE
|
||||
# endif /* !DYNAMIC_CRC_TABLE */
|
||||
#endif /* MAKECRCH */
|
||||
|
||||
#include "zutil.h" /* for STDC and FAR definitions */
|
||||
|
||||
#define local static
|
||||
|
||||
/* Definitions for doing the crc four data bytes at a time. */
|
||||
#if !defined(NOBYFOUR) && defined(Z_U4)
|
||||
# define BYFOUR
|
||||
#endif
|
||||
#ifdef BYFOUR
|
||||
local unsigned long crc32_little OF((unsigned long,
|
||||
const unsigned char FAR *, unsigned));
|
||||
local unsigned long crc32_big OF((unsigned long,
|
||||
const unsigned char FAR *, unsigned));
|
||||
# define TBLS 8
|
||||
#else
|
||||
# define TBLS 1
|
||||
#endif /* BYFOUR */
|
||||
|
||||
/* Local functions for crc concatenation */
|
||||
local unsigned long gf2_matrix_times OF((unsigned long *mat,
|
||||
unsigned long vec));
|
||||
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
|
||||
|
||||
local volatile int crc_table_empty = 1;
|
||||
local z_crc_t FAR crc_table[TBLS][256];
|
||||
local void make_crc_table OF((void));
|
||||
#ifdef MAKECRCH
|
||||
local void write_table OF((FILE *, const z_crc_t FAR *));
|
||||
#endif /* MAKECRCH */
|
||||
/*
|
||||
Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
|
||||
x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
|
||||
|
||||
Polynomials over GF(2) are represented in binary, one bit per coefficient,
|
||||
with the lowest powers in the most significant bit. Then adding polynomials
|
||||
is just exclusive-or, and multiplying a polynomial by x is a right shift by
|
||||
one. If we call the above polynomial p, and represent a byte as the
|
||||
polynomial q, also with the lowest power in the most significant bit (so the
|
||||
byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p,
|
||||
where a mod b means the remainder after dividing a by b.
|
||||
|
||||
This calculation is done using the shift-register method of multiplying and
|
||||
taking the remainder. The register is initialized to zero, and for each
|
||||
incoming bit, x^32 is added mod p to the register if the bit is a one (where
|
||||
x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by
|
||||
x (which is shifting right by one and adding x^32 mod p if the bit shifted
|
||||
out is a one). We start with the highest power (least significant bit) of
|
||||
q and repeat for all eight bits of q.
|
||||
|
||||
The first table is simply the CRC of all possible eight bit values. This is
|
||||
all the information needed to generate CRCs on data a byte at a time for all
|
||||
combinations of CRC register values and incoming bytes. The remaining tables
|
||||
allow for word-at-a-time CRC calculation for both big-endian and little-
|
||||
endian machines, where a word is four bytes.
|
||||
*/
|
||||
local void make_crc_table()
|
||||
{
|
||||
z_crc_t c;
|
||||
int n, k;
|
||||
z_crc_t poly; /* polynomial exclusive-or pattern */
|
||||
/* terms of polynomial defining this crc (except x^32): */
|
||||
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};
|
||||
|
||||
/* See if another task is already doing this (not thread-safe, but better
|
||||
than nothing -- significantly reduces duration of vulnerability in
|
||||
case the advice about DYNAMIC_CRC_TABLE is ignored) */
|
||||
if (first) {
|
||||
first = 0;
|
||||
|
||||
/* make exclusive-or pattern from polynomial (0xedb88320UL) */
|
||||
poly = 0;
|
||||
for (n = 0; n < (int)(sizeof(p)/sizeof(unsigned char)); n++)
|
||||
poly |= (z_crc_t)1 << (31 - p[n]);
|
||||
|
||||
/* generate a crc for every 8-bit value */
|
||||
for (n = 0; n < 256; n++) {
|
||||
c = (z_crc_t)n;
|
||||
for (k = 0; k < 8; k++)
|
||||
c = c & 1 ? poly ^ (c >> 1) : c >> 1;
|
||||
crc_table[0][n] = c;
|
||||
}
|
||||
|
||||
#ifdef BYFOUR
|
||||
/* generate crc for each value followed by one, two, and three zeros,
|
||||
and then the byte reversal of those as well as the first table */
|
||||
for (n = 0; n < 256; n++) {
|
||||
c = crc_table[0][n];
|
||||
crc_table[4][n] = ZSWAP32(c);
|
||||
for (k = 1; k < 4; k++) {
|
||||
c = crc_table[0][c & 0xff] ^ (c >> 8);
|
||||
crc_table[k][n] = c;
|
||||
crc_table[k + 4][n] = ZSWAP32(c);
|
||||
}
|
||||
}
|
||||
#endif /* BYFOUR */
|
||||
|
||||
crc_table_empty = 0;
|
||||
}
|
||||
else { /* not first */
|
||||
/* wait for the other guy to finish (not efficient, but rare) */
|
||||
while (crc_table_empty)
|
||||
;
|
||||
}
|
||||
|
||||
#ifdef MAKECRCH
|
||||
/* write out CRC tables to crc32.h */
|
||||
{
|
||||
FILE *out;
|
||||
|
||||
out = fopen("crc32.h", "w");
|
||||
if (out == NULL) return;
|
||||
fprintf(out, "/* crc32.h -- tables for rapid CRC calculation\n");
|
||||
fprintf(out, " * Generated automatically by crc32.c\n */\n\n");
|
||||
fprintf(out, "local const z_crc_t FAR ");
|
||||
fprintf(out, "crc_table[TBLS][256] =\n{\n {\n");
|
||||
write_table(out, crc_table[0]);
|
||||
# ifdef BYFOUR
|
||||
fprintf(out, "#ifdef BYFOUR\n");
|
||||
for (k = 1; k < 8; k++) {
|
||||
fprintf(out, " },\n {\n");
|
||||
write_table(out, crc_table[k]);
|
||||
}
|
||||
fprintf(out, "#endif\n");
|
||||
# endif /* BYFOUR */
|
||||
fprintf(out, " }\n};\n");
|
||||
fclose(out);
|
||||
}
|
||||
#endif /* MAKECRCH */
|
||||
}
|
||||
|
||||
#ifdef MAKECRCH
|
||||
local void write_table(out, table)
|
||||
FILE *out;
|
||||
const z_crc_t FAR *table;
|
||||
{
|
||||
int n;
|
||||
|
||||
for (n = 0; n < 256; n++)
|
||||
fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : " ",
|
||||
(unsigned long)(table[n]),
|
||||
n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", "));
|
||||
}
|
||||
#endif /* MAKECRCH */
|
||||
|
||||
#else /* !DYNAMIC_CRC_TABLE */
|
||||
/* ========================================================================
|
||||
* Tables of CRC-32s of all single-byte values, made by make_crc_table().
|
||||
*/
|
||||
#include "crc32.h"
|
||||
#endif /* DYNAMIC_CRC_TABLE */
|
||||
|
||||
/* =========================================================================
|
||||
* This function can be used by asm versions of crc32()
|
||||
*/
|
||||
const z_crc_t FAR * ZEXPORT get_crc_table()
|
||||
{
|
||||
#ifdef DYNAMIC_CRC_TABLE
|
||||
if (crc_table_empty)
|
||||
make_crc_table();
|
||||
#endif /* DYNAMIC_CRC_TABLE */
|
||||
return (const z_crc_t FAR *)crc_table;
|
||||
}
|
||||
|
||||
/* ========================================================================= */
|
||||
#define DO1 crc = crc_table[0][((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8)
|
||||
#define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1
|
||||
|
||||
/* ========================================================================= */
|
||||
unsigned long ZEXPORT crc32(crc, buf, len)
|
||||
unsigned long crc;
|
||||
const unsigned char FAR *buf;
|
||||
uInt len;
|
||||
{
|
||||
if (buf == Z_NULL) return 0UL;
|
||||
|
||||
#ifdef DYNAMIC_CRC_TABLE
|
||||
if (crc_table_empty)
|
||||
make_crc_table();
|
||||
#endif /* DYNAMIC_CRC_TABLE */
|
||||
|
||||
#ifdef BYFOUR
|
||||
if (sizeof(void *) == sizeof(ptrdiff_t)) {
|
||||
z_crc_t endian;
|
||||
|
||||
endian = 1;
|
||||
if (*((unsigned char *)(&endian)))
|
||||
return crc32_little(crc, buf, len);
|
||||
else
|
||||
return crc32_big(crc, buf, len);
|
||||
}
|
||||
#endif /* BYFOUR */
|
||||
crc = crc ^ 0xffffffffUL;
|
||||
while (len >= 8) {
|
||||
DO8;
|
||||
len -= 8;
|
||||
}
|
||||
if (len) do {
|
||||
DO1;
|
||||
} while (--len);
|
||||
return crc ^ 0xffffffffUL;
|
||||
}
|
||||
|
||||
#ifdef BYFOUR
|
||||
|
||||
/* ========================================================================= */
|
||||
#define DOLIT4 c ^= *buf4++; \
|
||||
c = crc_table[3][c & 0xff] ^ crc_table[2][(c >> 8) & 0xff] ^ \
|
||||
crc_table[1][(c >> 16) & 0xff] ^ crc_table[0][c >> 24]
|
||||
#define DOLIT32 DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4; DOLIT4
|
||||
|
||||
/* ========================================================================= */
|
||||
local unsigned long crc32_little(crc, buf, len)
|
||||
unsigned long crc;
|
||||
const unsigned char FAR *buf;
|
||||
unsigned len;
|
||||
{
|
||||
register z_crc_t c;
|
||||
register const z_crc_t FAR *buf4;
|
||||
|
||||
c = (z_crc_t)crc;
|
||||
c = ~c;
|
||||
while (len && ((ptrdiff_t)buf & 3)) {
|
||||
c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
|
||||
len--;
|
||||
}
|
||||
|
||||
buf4 = (const z_crc_t FAR *)(const void FAR *)buf;
|
||||
while (len >= 32) {
|
||||
DOLIT32;
|
||||
len -= 32;
|
||||
}
|
||||
while (len >= 4) {
|
||||
DOLIT4;
|
||||
len -= 4;
|
||||
}
|
||||
buf = (const unsigned char FAR *)buf4;
|
||||
|
||||
if (len) do {
|
||||
c = crc_table[0][(c ^ *buf++) & 0xff] ^ (c >> 8);
|
||||
} while (--len);
|
||||
c = ~c;
|
||||
return (unsigned long)c;
|
||||
}
|
||||
|
||||
/* ========================================================================= */
|
||||
#define DOBIG4 c ^= *++buf4; \
|
||||
c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \
|
||||
crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24]
|
||||
#define DOBIG32 DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4
|
||||
|
||||
/* ========================================================================= */
|
||||
local unsigned long crc32_big(crc, buf, len)
|
||||
unsigned long crc;
|
||||
const unsigned char FAR *buf;
|
||||
unsigned len;
|
||||
{
|
||||
register z_crc_t c;
|
||||
register const z_crc_t FAR *buf4;
|
||||
|
||||
c = ZSWAP32((z_crc_t)crc);
|
||||
c = ~c;
|
||||
while (len && ((ptrdiff_t)buf & 3)) {
|
||||
c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
|
||||
len--;
|
||||
}
|
||||
|
||||
buf4 = (const z_crc_t FAR *)(const void FAR *)buf;
|
||||
buf4--;
|
||||
while (len >= 32) {
|
||||
DOBIG32;
|
||||
len -= 32;
|
||||
}
|
||||
while (len >= 4) {
|
||||
DOBIG4;
|
||||
len -= 4;
|
||||
}
|
||||
buf4++;
|
||||
buf = (const unsigned char FAR *)buf4;
|
||||
|
||||
if (len) do {
|
||||
c = crc_table[4][(c >> 24) ^ *buf++] ^ (c << 8);
|
||||
} while (--len);
|
||||
c = ~c;
|
||||
return (unsigned long)(ZSWAP32(c));
|
||||
}
|
||||
|
||||
#endif /* BYFOUR */
|
||||
|
||||
#define GF2_DIM 32 /* dimension of GF(2) vectors (length of CRC) */
|
||||
|
||||
/* ========================================================================= */
|
||||
local unsigned long gf2_matrix_times(mat, vec)
|
||||
unsigned long *mat;
|
||||
unsigned long vec;
|
||||
{
|
||||
unsigned long sum;
|
||||
|
||||
sum = 0;
|
||||
while (vec) {
|
||||
if (vec & 1)
|
||||
sum ^= *mat;
|
||||
vec >>= 1;
|
||||
mat++;
|
||||
}
|
||||
return sum;
|
||||
}
|
||||
|
||||
/* ========================================================================= */
|
||||
local void gf2_matrix_square(square, mat)
|
||||
unsigned long *square;
|
||||
unsigned long *mat;
|
||||
{
|
||||
int n;
|
||||
|
||||
for (n = 0; n < GF2_DIM; n++)
|
||||
square[n] = gf2_matrix_times(mat, mat[n]);
|
||||
}
|
||||
|
||||
/* ========================================================================= */
|
||||
local uLong crc32_combine_(crc1, crc2, len2)
|
||||
uLong crc1;
|
||||
uLong crc2;
|
||||
z_off64_t len2;
|
||||
{
|
||||
int n;
|
||||
unsigned long row;
|
||||
unsigned long even[GF2_DIM]; /* even-power-of-two zeros operator */
|
||||
unsigned long odd[GF2_DIM]; /* odd-power-of-two zeros operator */
|
||||
|
||||
/* degenerate case (also disallow negative lengths) */
|
||||
if (len2 <= 0)
|
||||
return crc1;
|
||||
|
||||
/* put operator for one zero bit in odd */
|
||||
odd[0] = 0xedb88320UL; /* CRC-32 polynomial */
|
||||
row = 1;
|
||||
for (n = 1; n < GF2_DIM; n++) {
|
||||
odd[n] = row;
|
||||
row <<= 1;
|
||||
}
|
||||
|
||||
/* put operator for two zero bits in even */
|
||||
gf2_matrix_square(even, odd);
|
||||
|
||||
/* put operator for four zero bits in odd */
|
||||
gf2_matrix_square(odd, even);
|
||||
|
||||
/* apply len2 zeros to crc1 (first square will put the operator for one
|
||||
zero byte, eight zero bits, in even) */
|
||||
do {
|
||||
/* apply zeros operator for this bit of len2 */
|
||||
gf2_matrix_square(even, odd);
|
||||
if (len2 & 1)
|
||||
crc1 = gf2_matrix_times(even, crc1);
|
||||
len2 >>= 1;
|
||||
|
||||
/* if no more bits set, then done */
|
||||
if (len2 == 0)
|
||||
break;
|
||||
|
||||
/* another iteration of the loop with odd and even swapped */
|
||||
gf2_matrix_square(odd, even);
|
||||
if (len2 & 1)
|
||||
crc1 = gf2_matrix_times(odd, crc1);
|
||||
len2 >>= 1;
|
||||
|
||||
/* if no more bits set, then done */
|
||||
} while (len2 != 0);
|
||||
|
||||
/* return combined crc */
|
||||
crc1 ^= crc2;
|
||||
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);
|
||||
}
|
||||
1967
zlib-1.2.8/deflate.c
Executable file
1967
zlib-1.2.8/deflate.c
Executable file
File diff suppressed because it is too large
Load Diff
25
zlib-1.2.8/gzclose.c
Executable file
25
zlib-1.2.8/gzclose.c
Executable file
@ -0,0 +1,25 @@
|
||||
/* gzclose.c -- zlib gzclose() function
|
||||
* Copyright (C) 2004, 2010 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
#include "gzguts.h"
|
||||
|
||||
/* gzclose() is in a separate file so that it is linked in only if it is used.
|
||||
That way the other gzclose functions can be used instead to avoid linking in
|
||||
unneeded compression or decompression routines. */
|
||||
int ZEXPORT gzclose(file)
|
||||
gzFile file;
|
||||
{
|
||||
#ifndef NO_GZCOMPRESS
|
||||
gz_statep state;
|
||||
|
||||
if (file == NULL)
|
||||
return Z_STREAM_ERROR;
|
||||
state = (gz_statep)file;
|
||||
|
||||
return state->mode == GZ_READ ? gzclose_r(file) : gzclose_w(file);
|
||||
#else
|
||||
return gzclose_r(file);
|
||||
#endif
|
||||
}
|
||||
634
zlib-1.2.8/gzlib.c
Executable file
634
zlib-1.2.8/gzlib.c
Executable file
@ -0,0 +1,634 @@
|
||||
/* gzlib.c -- zlib functions common to reading and writing gzip files
|
||||
* Copyright (C) 2004, 2010, 2011, 2012, 2013 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
#include "gzguts.h"
|
||||
|
||||
#if defined(_WIN32) && !defined(__BORLANDC__)
|
||||
# define LSEEK _lseeki64
|
||||
#else
|
||||
#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0
|
||||
# define LSEEK lseek64
|
||||
#else
|
||||
# define LSEEK lseek
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/* Local functions */
|
||||
local void gz_reset OF((gz_statep));
|
||||
local gzFile gz_open OF((const void *, int, const char *));
|
||||
|
||||
#if defined UNDER_CE
|
||||
|
||||
/* Map the Windows error number in ERROR to a locale-dependent error message
|
||||
string and return a pointer to it. Typically, the values for ERROR come
|
||||
from GetLastError.
|
||||
|
||||
The string pointed to shall not be modified by the application, but may be
|
||||
overwritten by a subsequent call to gz_strwinerror
|
||||
|
||||
The gz_strwinerror function does not change the current setting of
|
||||
GetLastError. */
|
||||
char ZLIB_INTERNAL *gz_strwinerror (error)
|
||||
DWORD error;
|
||||
{
|
||||
static char buf[1024];
|
||||
|
||||
wchar_t *msgbuf;
|
||||
DWORD lasterr = GetLastError();
|
||||
DWORD chars = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM
|
||||
| FORMAT_MESSAGE_ALLOCATE_BUFFER,
|
||||
NULL,
|
||||
error,
|
||||
0, /* Default language */
|
||||
(LPVOID)&msgbuf,
|
||||
0,
|
||||
NULL);
|
||||
if (chars != 0) {
|
||||
/* If there is an \r\n appended, zap it. */
|
||||
if (chars >= 2
|
||||
&& msgbuf[chars - 2] == '\r' && msgbuf[chars - 1] == '\n') {
|
||||
chars -= 2;
|
||||
msgbuf[chars] = 0;
|
||||
}
|
||||
|
||||
if (chars > sizeof (buf) - 1) {
|
||||
chars = sizeof (buf) - 1;
|
||||
msgbuf[chars] = 0;
|
||||
}
|
||||
|
||||
wcstombs(buf, msgbuf, chars + 1);
|
||||
LocalFree(msgbuf);
|
||||
}
|
||||
else {
|
||||
sprintf(buf, "unknown win32 error (%ld)", error);
|
||||
}
|
||||
|
||||
SetLastError(lasterr);
|
||||
return buf;
|
||||
}
|
||||
|
||||
#endif /* UNDER_CE */
|
||||
|
||||
/* Reset gzip file state */
|
||||
local void gz_reset(state)
|
||||
gz_statep state;
|
||||
{
|
||||
state->x.have = 0; /* no output data available */
|
||||
if (state->mode == GZ_READ) { /* for reading ... */
|
||||
state->eof = 0; /* not at end of file */
|
||||
state->past = 0; /* have not read past end yet */
|
||||
state->how = LOOK; /* look for gzip header */
|
||||
}
|
||||
state->seek = 0; /* no seek request pending */
|
||||
gz_error(state, Z_OK, NULL); /* clear error */
|
||||
state->x.pos = 0; /* no uncompressed data yet */
|
||||
state->strm.avail_in = 0; /* no input data yet */
|
||||
}
|
||||
|
||||
/* Open a gzip file either by name or file descriptor. */
|
||||
local gzFile gz_open(path, fd, mode)
|
||||
const void *path;
|
||||
int fd;
|
||||
const char *mode;
|
||||
{
|
||||
gz_statep state;
|
||||
size_t len;
|
||||
int oflag;
|
||||
#ifdef O_CLOEXEC
|
||||
int cloexec = 0;
|
||||
#endif
|
||||
#ifdef O_EXCL
|
||||
int exclusive = 0;
|
||||
#endif
|
||||
|
||||
/* check input */
|
||||
if (path == NULL)
|
||||
return NULL;
|
||||
|
||||
/* allocate gzFile structure to return */
|
||||
state = (gz_statep)malloc(sizeof(gz_state));
|
||||
if (state == NULL)
|
||||
return NULL;
|
||||
state->size = 0; /* no buffers allocated yet */
|
||||
state->want = GZBUFSIZE; /* requested buffer size */
|
||||
state->msg = NULL; /* no error message yet */
|
||||
|
||||
/* interpret mode */
|
||||
state->mode = GZ_NONE;
|
||||
state->level = Z_DEFAULT_COMPRESSION;
|
||||
state->strategy = Z_DEFAULT_STRATEGY;
|
||||
state->direct = 0;
|
||||
while (*mode) {
|
||||
if (*mode >= '0' && *mode <= '9')
|
||||
state->level = *mode - '0';
|
||||
else
|
||||
switch (*mode) {
|
||||
case 'r':
|
||||
state->mode = GZ_READ;
|
||||
break;
|
||||
#ifndef NO_GZCOMPRESS
|
||||
case 'w':
|
||||
state->mode = GZ_WRITE;
|
||||
break;
|
||||
case 'a':
|
||||
state->mode = GZ_APPEND;
|
||||
break;
|
||||
#endif
|
||||
case '+': /* can't read and write at the same time */
|
||||
free(state);
|
||||
return NULL;
|
||||
case 'b': /* ignore -- will request binary anyway */
|
||||
break;
|
||||
#ifdef O_CLOEXEC
|
||||
case 'e':
|
||||
cloexec = 1;
|
||||
break;
|
||||
#endif
|
||||
#ifdef O_EXCL
|
||||
case 'x':
|
||||
exclusive = 1;
|
||||
break;
|
||||
#endif
|
||||
case 'f':
|
||||
state->strategy = Z_FILTERED;
|
||||
break;
|
||||
case 'h':
|
||||
state->strategy = Z_HUFFMAN_ONLY;
|
||||
break;
|
||||
case 'R':
|
||||
state->strategy = Z_RLE;
|
||||
break;
|
||||
case 'F':
|
||||
state->strategy = Z_FIXED;
|
||||
break;
|
||||
case 'T':
|
||||
state->direct = 1;
|
||||
break;
|
||||
default: /* could consider as an error, but just ignore */
|
||||
;
|
||||
}
|
||||
mode++;
|
||||
}
|
||||
|
||||
/* must provide an "r", "w", or "a" */
|
||||
if (state->mode == GZ_NONE) {
|
||||
free(state);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* can't force transparent read */
|
||||
if (state->mode == GZ_READ) {
|
||||
if (state->direct) {
|
||||
free(state);
|
||||
return NULL;
|
||||
}
|
||||
state->direct = 1; /* for empty file */
|
||||
}
|
||||
|
||||
/* save the path name for error messages */
|
||||
#ifdef _WIN32
|
||||
if (fd == -2) {
|
||||
len = wcstombs(NULL, path, 0);
|
||||
if (len == (size_t)-1)
|
||||
len = 0;
|
||||
}
|
||||
else
|
||||
#endif
|
||||
len = strlen((const char *)path);
|
||||
state->path = (char *)malloc(len + 1);
|
||||
if (state->path == NULL) {
|
||||
free(state);
|
||||
return NULL;
|
||||
}
|
||||
#ifdef _WIN32
|
||||
if (fd == -2)
|
||||
if (len)
|
||||
wcstombs(state->path, path, len + 1);
|
||||
else
|
||||
*(state->path) = 0;
|
||||
else
|
||||
#endif
|
||||
#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
|
||||
snprintf(state->path, len + 1, "%s", (const char *)path);
|
||||
#else
|
||||
strcpy(state->path, path);
|
||||
#endif
|
||||
|
||||
/* compute the flags for open() */
|
||||
oflag =
|
||||
#ifdef O_LARGEFILE
|
||||
O_LARGEFILE |
|
||||
#endif
|
||||
#ifdef O_BINARY
|
||||
O_BINARY |
|
||||
#endif
|
||||
#ifdef O_CLOEXEC
|
||||
(cloexec ? O_CLOEXEC : 0) |
|
||||
#endif
|
||||
(state->mode == GZ_READ ?
|
||||
O_RDONLY :
|
||||
(O_WRONLY | O_CREAT |
|
||||
#ifdef O_EXCL
|
||||
(exclusive ? O_EXCL : 0) |
|
||||
#endif
|
||||
(state->mode == GZ_WRITE ?
|
||||
O_TRUNC :
|
||||
O_APPEND)));
|
||||
|
||||
/* open the file with the appropriate flags (or just use fd) */
|
||||
state->fd = fd > -1 ? fd : (
|
||||
#ifdef _WIN32
|
||||
fd == -2 ? _wopen(path, oflag, 0666) :
|
||||
#endif
|
||||
open((const char *)path, oflag, 0666));
|
||||
if (state->fd == -1) {
|
||||
free(state->path);
|
||||
free(state);
|
||||
return NULL;
|
||||
}
|
||||
if (state->mode == GZ_APPEND)
|
||||
state->mode = GZ_WRITE; /* simplify later checks */
|
||||
|
||||
/* save the current position for rewinding (only if reading) */
|
||||
if (state->mode == GZ_READ) {
|
||||
state->start = LSEEK(state->fd, 0, SEEK_CUR);
|
||||
if (state->start == -1) state->start = 0;
|
||||
}
|
||||
|
||||
/* initialize stream */
|
||||
gz_reset(state);
|
||||
|
||||
/* return stream */
|
||||
return (gzFile)state;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
gzFile ZEXPORT gzopen(path, mode)
|
||||
const char *path;
|
||||
const char *mode;
|
||||
{
|
||||
return gz_open(path, -1, mode);
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
gzFile ZEXPORT gzopen64(path, mode)
|
||||
const char *path;
|
||||
const char *mode;
|
||||
{
|
||||
return gz_open(path, -1, mode);
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
gzFile ZEXPORT gzdopen(fd, mode)
|
||||
int fd;
|
||||
const char *mode;
|
||||
{
|
||||
char *path; /* identifier for error messages */
|
||||
gzFile gz;
|
||||
|
||||
if (fd == -1 || (path = (char *)malloc(7 + 3 * sizeof(int))) == NULL)
|
||||
return NULL;
|
||||
#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
|
||||
snprintf(path, 7 + 3 * sizeof(int), "<fd:%d>", fd); /* for debugging */
|
||||
#else
|
||||
sprintf(path, "<fd:%d>", fd); /* for debugging */
|
||||
#endif
|
||||
gz = gz_open(path, fd, mode);
|
||||
free(path);
|
||||
return gz;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
#ifdef _WIN32
|
||||
gzFile ZEXPORT gzopen_w(path, mode)
|
||||
const wchar_t *path;
|
||||
const char *mode;
|
||||
{
|
||||
return gz_open(path, -2, mode);
|
||||
}
|
||||
#endif
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORT gzbuffer(file, size)
|
||||
gzFile file;
|
||||
unsigned size;
|
||||
{
|
||||
gz_statep state;
|
||||
|
||||
/* get internal structure and check integrity */
|
||||
if (file == NULL)
|
||||
return -1;
|
||||
state = (gz_statep)file;
|
||||
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
|
||||
return -1;
|
||||
|
||||
/* make sure we haven't already allocated memory */
|
||||
if (state->size != 0)
|
||||
return -1;
|
||||
|
||||
/* check and set requested size */
|
||||
if (size < 2)
|
||||
size = 2; /* need two bytes to check magic header */
|
||||
state->want = size;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORT gzrewind(file)
|
||||
gzFile file;
|
||||
{
|
||||
gz_statep state;
|
||||
|
||||
/* get internal structure */
|
||||
if (file == NULL)
|
||||
return -1;
|
||||
state = (gz_statep)file;
|
||||
|
||||
/* check that we're reading and that there's no error */
|
||||
if (state->mode != GZ_READ ||
|
||||
(state->err != Z_OK && state->err != Z_BUF_ERROR))
|
||||
return -1;
|
||||
|
||||
/* back up and start over */
|
||||
if (LSEEK(state->fd, state->start, SEEK_SET) == -1)
|
||||
return -1;
|
||||
gz_reset(state);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
z_off64_t ZEXPORT gzseek64(file, offset, whence)
|
||||
gzFile file;
|
||||
z_off64_t offset;
|
||||
int whence;
|
||||
{
|
||||
unsigned n;
|
||||
z_off64_t ret;
|
||||
gz_statep state;
|
||||
|
||||
/* get internal structure and check integrity */
|
||||
if (file == NULL)
|
||||
return -1;
|
||||
state = (gz_statep)file;
|
||||
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
|
||||
return -1;
|
||||
|
||||
/* check that there's no error */
|
||||
if (state->err != Z_OK && state->err != Z_BUF_ERROR)
|
||||
return -1;
|
||||
|
||||
/* can only seek from start or relative to current position */
|
||||
if (whence != SEEK_SET && whence != SEEK_CUR)
|
||||
return -1;
|
||||
|
||||
/* normalize offset to a SEEK_CUR specification */
|
||||
if (whence == SEEK_SET)
|
||||
offset -= state->x.pos;
|
||||
else if (state->seek)
|
||||
offset += state->skip;
|
||||
state->seek = 0;
|
||||
|
||||
/* if within raw area while reading, just go there */
|
||||
if (state->mode == GZ_READ && state->how == COPY &&
|
||||
state->x.pos + offset >= 0) {
|
||||
ret = LSEEK(state->fd, offset - state->x.have, SEEK_CUR);
|
||||
if (ret == -1)
|
||||
return -1;
|
||||
state->x.have = 0;
|
||||
state->eof = 0;
|
||||
state->past = 0;
|
||||
state->seek = 0;
|
||||
gz_error(state, Z_OK, NULL);
|
||||
state->strm.avail_in = 0;
|
||||
state->x.pos += offset;
|
||||
return state->x.pos;
|
||||
}
|
||||
|
||||
/* calculate skip amount, rewinding if needed for back seek when reading */
|
||||
if (offset < 0) {
|
||||
if (state->mode != GZ_READ) /* writing -- can't go backwards */
|
||||
return -1;
|
||||
offset += state->x.pos;
|
||||
if (offset < 0) /* before start of file! */
|
||||
return -1;
|
||||
if (gzrewind(file) == -1) /* rewind, then skip to offset */
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* if reading, skip what's in output buffer (one less gzgetc() check) */
|
||||
if (state->mode == GZ_READ) {
|
||||
n = GT_OFF(state->x.have) || (z_off64_t)state->x.have > offset ?
|
||||
(unsigned)offset : state->x.have;
|
||||
state->x.have -= n;
|
||||
state->x.next += n;
|
||||
state->x.pos += n;
|
||||
offset -= n;
|
||||
}
|
||||
|
||||
/* request skip (if not zero) */
|
||||
if (offset) {
|
||||
state->seek = 1;
|
||||
state->skip = offset;
|
||||
}
|
||||
return state->x.pos + offset;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
z_off_t ZEXPORT gzseek(file, offset, whence)
|
||||
gzFile file;
|
||||
z_off_t offset;
|
||||
int whence;
|
||||
{
|
||||
z_off64_t ret;
|
||||
|
||||
ret = gzseek64(file, (z_off64_t)offset, whence);
|
||||
return ret == (z_off_t)ret ? (z_off_t)ret : -1;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
z_off64_t ZEXPORT gztell64(file)
|
||||
gzFile file;
|
||||
{
|
||||
gz_statep state;
|
||||
|
||||
/* get internal structure and check integrity */
|
||||
if (file == NULL)
|
||||
return -1;
|
||||
state = (gz_statep)file;
|
||||
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
|
||||
return -1;
|
||||
|
||||
/* return position */
|
||||
return state->x.pos + (state->seek ? state->skip : 0);
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
z_off_t ZEXPORT gztell(file)
|
||||
gzFile file;
|
||||
{
|
||||
z_off64_t ret;
|
||||
|
||||
ret = gztell64(file);
|
||||
return ret == (z_off_t)ret ? (z_off_t)ret : -1;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
z_off64_t ZEXPORT gzoffset64(file)
|
||||
gzFile file;
|
||||
{
|
||||
z_off64_t offset;
|
||||
gz_statep state;
|
||||
|
||||
/* get internal structure and check integrity */
|
||||
if (file == NULL)
|
||||
return -1;
|
||||
state = (gz_statep)file;
|
||||
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
|
||||
return -1;
|
||||
|
||||
/* compute and return effective offset in file */
|
||||
offset = LSEEK(state->fd, 0, SEEK_CUR);
|
||||
if (offset == -1)
|
||||
return -1;
|
||||
if (state->mode == GZ_READ) /* reading */
|
||||
offset -= state->strm.avail_in; /* don't count buffered input */
|
||||
return offset;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
z_off_t ZEXPORT gzoffset(file)
|
||||
gzFile file;
|
||||
{
|
||||
z_off64_t ret;
|
||||
|
||||
ret = gzoffset64(file);
|
||||
return ret == (z_off_t)ret ? (z_off_t)ret : -1;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORT gzeof(file)
|
||||
gzFile file;
|
||||
{
|
||||
gz_statep state;
|
||||
|
||||
/* get internal structure and check integrity */
|
||||
if (file == NULL)
|
||||
return 0;
|
||||
state = (gz_statep)file;
|
||||
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
|
||||
return 0;
|
||||
|
||||
/* return end-of-file state */
|
||||
return state->mode == GZ_READ ? state->past : 0;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
const char * ZEXPORT gzerror(file, errnum)
|
||||
gzFile file;
|
||||
int *errnum;
|
||||
{
|
||||
gz_statep state;
|
||||
|
||||
/* get internal structure and check integrity */
|
||||
if (file == NULL)
|
||||
return NULL;
|
||||
state = (gz_statep)file;
|
||||
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
|
||||
return NULL;
|
||||
|
||||
/* return error information */
|
||||
if (errnum != NULL)
|
||||
*errnum = state->err;
|
||||
return state->err == Z_MEM_ERROR ? "out of memory" :
|
||||
(state->msg == NULL ? "" : state->msg);
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
void ZEXPORT gzclearerr(file)
|
||||
gzFile file;
|
||||
{
|
||||
gz_statep state;
|
||||
|
||||
/* get internal structure and check integrity */
|
||||
if (file == NULL)
|
||||
return;
|
||||
state = (gz_statep)file;
|
||||
if (state->mode != GZ_READ && state->mode != GZ_WRITE)
|
||||
return;
|
||||
|
||||
/* clear error and end-of-file */
|
||||
if (state->mode == GZ_READ) {
|
||||
state->eof = 0;
|
||||
state->past = 0;
|
||||
}
|
||||
gz_error(state, Z_OK, NULL);
|
||||
}
|
||||
|
||||
/* Create an error message in allocated memory and set state->err and
|
||||
state->msg accordingly. Free any previous error message already there. Do
|
||||
not try to free or allocate space if the error is Z_MEM_ERROR (out of
|
||||
memory). Simply save the error message as a static string. If there is an
|
||||
allocation failure constructing the error message, then convert the error to
|
||||
out of memory. */
|
||||
void ZLIB_INTERNAL gz_error(state, err, msg)
|
||||
gz_statep state;
|
||||
int err;
|
||||
const char *msg;
|
||||
{
|
||||
/* free previously allocated message and clear */
|
||||
if (state->msg != NULL) {
|
||||
if (state->err != Z_MEM_ERROR)
|
||||
free(state->msg);
|
||||
state->msg = NULL;
|
||||
}
|
||||
|
||||
/* if fatal, set state->x.have to 0 so that the gzgetc() macro fails */
|
||||
if (err != Z_OK && err != Z_BUF_ERROR)
|
||||
state->x.have = 0;
|
||||
|
||||
/* set error code, and if no message, then done */
|
||||
state->err = err;
|
||||
if (msg == NULL)
|
||||
return;
|
||||
|
||||
/* for an out of memory error, return literal string when requested */
|
||||
if (err == Z_MEM_ERROR)
|
||||
return;
|
||||
|
||||
/* construct error message with path */
|
||||
if ((state->msg = (char *)malloc(strlen(state->path) + strlen(msg) + 3)) ==
|
||||
NULL) {
|
||||
state->err = Z_MEM_ERROR;
|
||||
return;
|
||||
}
|
||||
#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
|
||||
snprintf(state->msg, strlen(state->path) + strlen(msg) + 3,
|
||||
"%s%s%s", state->path, ": ", msg);
|
||||
#else
|
||||
strcpy(state->msg, state->path);
|
||||
strcat(state->msg, ": ");
|
||||
strcat(state->msg, msg);
|
||||
#endif
|
||||
return;
|
||||
}
|
||||
|
||||
#ifndef INT_MAX
|
||||
/* portably return maximum value for an int (when limits.h presumed not
|
||||
available) -- we need to do this to cover cases where 2's complement not
|
||||
used, since C standard permits 1's complement and sign-bit representations,
|
||||
otherwise we could just use ((unsigned)-1) >> 1 */
|
||||
unsigned ZLIB_INTERNAL gz_intmax()
|
||||
{
|
||||
unsigned p, q;
|
||||
|
||||
p = 1;
|
||||
do {
|
||||
q = p;
|
||||
p <<= 1;
|
||||
p++;
|
||||
} while (p > q);
|
||||
return q >> 1;
|
||||
}
|
||||
#endif
|
||||
594
zlib-1.2.8/gzread.c
Executable file
594
zlib-1.2.8/gzread.c
Executable file
@ -0,0 +1,594 @@
|
||||
/* gzread.c -- zlib functions for reading gzip files
|
||||
* Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
#include "gzguts.h"
|
||||
|
||||
/* Local functions */
|
||||
local int gz_load OF((gz_statep, unsigned char *, unsigned, unsigned *));
|
||||
local int gz_avail OF((gz_statep));
|
||||
local int gz_look OF((gz_statep));
|
||||
local int gz_decomp OF((gz_statep));
|
||||
local int gz_fetch OF((gz_statep));
|
||||
local int gz_skip OF((gz_statep, z_off64_t));
|
||||
|
||||
/* Use read() to load a buffer -- return -1 on error, otherwise 0. Read from
|
||||
state->fd, and update state->eof, state->err, and state->msg as appropriate.
|
||||
This function needs to loop on read(), since read() is not guaranteed to
|
||||
read the number of bytes requested, depending on the type of descriptor. */
|
||||
local int gz_load(state, buf, len, have)
|
||||
gz_statep state;
|
||||
unsigned char *buf;
|
||||
unsigned len;
|
||||
unsigned *have;
|
||||
{
|
||||
int ret;
|
||||
|
||||
*have = 0;
|
||||
do {
|
||||
ret = read(state->fd, buf + *have, len - *have);
|
||||
if (ret <= 0)
|
||||
break;
|
||||
*have += ret;
|
||||
} while (*have < len);
|
||||
if (ret < 0) {
|
||||
gz_error(state, Z_ERRNO, zstrerror());
|
||||
return -1;
|
||||
}
|
||||
if (ret == 0)
|
||||
state->eof = 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Load up input buffer and set eof flag if last data loaded -- return -1 on
|
||||
error, 0 otherwise. Note that the eof flag is set when the end of the input
|
||||
file is reached, even though there may be unused data in the buffer. Once
|
||||
that data has been used, no more attempts will be made to read the file.
|
||||
If strm->avail_in != 0, then the current data is moved to the beginning of
|
||||
the input buffer, and then the remainder of the buffer is loaded with the
|
||||
available data from the input file. */
|
||||
local int gz_avail(state)
|
||||
gz_statep state;
|
||||
{
|
||||
unsigned got;
|
||||
z_streamp strm = &(state->strm);
|
||||
|
||||
if (state->err != Z_OK && state->err != Z_BUF_ERROR)
|
||||
return -1;
|
||||
if (state->eof == 0) {
|
||||
if (strm->avail_in) { /* copy what's there to the start */
|
||||
unsigned char *p = state->in;
|
||||
unsigned const char *q = strm->next_in;
|
||||
unsigned n = strm->avail_in;
|
||||
do {
|
||||
*p++ = *q++;
|
||||
} while (--n);
|
||||
}
|
||||
if (gz_load(state, state->in + strm->avail_in,
|
||||
state->size - strm->avail_in, &got) == -1)
|
||||
return -1;
|
||||
strm->avail_in += got;
|
||||
strm->next_in = state->in;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Look for gzip header, set up for inflate or copy. state->x.have must be 0.
|
||||
If this is the first time in, allocate required memory. state->how will be
|
||||
left unchanged if there is no more input data available, will be set to COPY
|
||||
if there is no gzip header and direct copying will be performed, or it will
|
||||
be set to GZIP for decompression. If direct copying, then leftover input
|
||||
data from the input buffer will be copied to the output buffer. In that
|
||||
case, all further file reads will be directly to either the output buffer or
|
||||
a user buffer. If decompressing, the inflate state will be initialized.
|
||||
gz_look() will return 0 on success or -1 on failure. */
|
||||
local int gz_look(state)
|
||||
gz_statep state;
|
||||
{
|
||||
z_streamp strm = &(state->strm);
|
||||
|
||||
/* allocate read buffers and inflate memory */
|
||||
if (state->size == 0) {
|
||||
/* allocate buffers */
|
||||
state->in = (unsigned char *)malloc(state->want);
|
||||
state->out = (unsigned char *)malloc(state->want << 1);
|
||||
if (state->in == NULL || state->out == NULL) {
|
||||
if (state->out != NULL)
|
||||
free(state->out);
|
||||
if (state->in != NULL)
|
||||
free(state->in);
|
||||
gz_error(state, Z_MEM_ERROR, "out of memory");
|
||||
return -1;
|
||||
}
|
||||
state->size = state->want;
|
||||
|
||||
/* allocate inflate memory */
|
||||
state->strm.zalloc = Z_NULL;
|
||||
state->strm.zfree = Z_NULL;
|
||||
state->strm.opaque = Z_NULL;
|
||||
state->strm.avail_in = 0;
|
||||
state->strm.next_in = Z_NULL;
|
||||
if (inflateInit2(&(state->strm), 15 + 16) != Z_OK) { /* gunzip */
|
||||
free(state->out);
|
||||
free(state->in);
|
||||
state->size = 0;
|
||||
gz_error(state, Z_MEM_ERROR, "out of memory");
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
/* get at least the magic bytes in the input buffer */
|
||||
if (strm->avail_in < 2) {
|
||||
if (gz_avail(state) == -1)
|
||||
return -1;
|
||||
if (strm->avail_in == 0)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* look for gzip magic bytes -- if there, do gzip decoding (note: there is
|
||||
a logical dilemma here when considering the case of a partially written
|
||||
gzip file, to wit, if a single 31 byte is written, then we cannot tell
|
||||
whether this is a single-byte file, or just a partially written gzip
|
||||
file -- for here we assume that if a gzip file is being written, then
|
||||
the header will be written in a single operation, so that reading a
|
||||
single byte is sufficient indication that it is not a gzip file) */
|
||||
if (strm->avail_in > 1 &&
|
||||
strm->next_in[0] == 31 && strm->next_in[1] == 139) {
|
||||
inflateReset(strm);
|
||||
state->how = GZIP;
|
||||
state->direct = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* no gzip header -- if we were decoding gzip before, then this is trailing
|
||||
garbage. Ignore the trailing garbage and finish. */
|
||||
if (state->direct == 0) {
|
||||
strm->avail_in = 0;
|
||||
state->eof = 1;
|
||||
state->x.have = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* doing raw i/o, copy any leftover input to output -- this assumes that
|
||||
the output buffer is larger than the input buffer, which also assures
|
||||
space for gzungetc() */
|
||||
state->x.next = state->out;
|
||||
if (strm->avail_in) {
|
||||
memcpy(state->x.next, strm->next_in, strm->avail_in);
|
||||
state->x.have = strm->avail_in;
|
||||
strm->avail_in = 0;
|
||||
}
|
||||
state->how = COPY;
|
||||
state->direct = 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Decompress from input to the provided next_out and avail_out in the state.
|
||||
On return, state->x.have and state->x.next point to the just decompressed
|
||||
data. If the gzip stream completes, state->how is reset to LOOK to look for
|
||||
the next gzip stream or raw data, once state->x.have is depleted. Returns 0
|
||||
on success, -1 on failure. */
|
||||
local int gz_decomp(state)
|
||||
gz_statep state;
|
||||
{
|
||||
int ret = Z_OK;
|
||||
unsigned had;
|
||||
z_streamp strm = &(state->strm);
|
||||
|
||||
/* fill output buffer up to end of deflate stream */
|
||||
had = strm->avail_out;
|
||||
do {
|
||||
/* get more input for inflate() */
|
||||
if (strm->avail_in == 0 && gz_avail(state) == -1)
|
||||
return -1;
|
||||
if (strm->avail_in == 0) {
|
||||
gz_error(state, Z_BUF_ERROR, "unexpected end of file");
|
||||
break;
|
||||
}
|
||||
|
||||
/* decompress and handle errors */
|
||||
ret = inflate(strm, Z_NO_FLUSH);
|
||||
if (ret == Z_STREAM_ERROR || ret == Z_NEED_DICT) {
|
||||
gz_error(state, Z_STREAM_ERROR,
|
||||
"internal error: inflate stream corrupt");
|
||||
return -1;
|
||||
}
|
||||
if (ret == Z_MEM_ERROR) {
|
||||
gz_error(state, Z_MEM_ERROR, "out of memory");
|
||||
return -1;
|
||||
}
|
||||
if (ret == Z_DATA_ERROR) { /* deflate stream invalid */
|
||||
gz_error(state, Z_DATA_ERROR,
|
||||
strm->msg == NULL ? "compressed data error" : strm->msg);
|
||||
return -1;
|
||||
}
|
||||
} while (strm->avail_out && ret != Z_STREAM_END);
|
||||
|
||||
/* update available output */
|
||||
state->x.have = had - strm->avail_out;
|
||||
state->x.next = strm->next_out - state->x.have;
|
||||
|
||||
/* if the gzip stream completed successfully, look for another */
|
||||
if (ret == Z_STREAM_END)
|
||||
state->how = LOOK;
|
||||
|
||||
/* good decompression */
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Fetch data and put it in the output buffer. Assumes state->x.have is 0.
|
||||
Data is either copied from the input file or decompressed from the input
|
||||
file depending on state->how. If state->how is LOOK, then a gzip header is
|
||||
looked for to determine whether to copy or decompress. Returns -1 on error,
|
||||
otherwise 0. gz_fetch() will leave state->how as COPY or GZIP unless the
|
||||
end of the input file has been reached and all data has been processed. */
|
||||
local int gz_fetch(state)
|
||||
gz_statep state;
|
||||
{
|
||||
z_streamp strm = &(state->strm);
|
||||
|
||||
do {
|
||||
switch(state->how) {
|
||||
case LOOK: /* -> LOOK, COPY (only if never GZIP), or GZIP */
|
||||
if (gz_look(state) == -1)
|
||||
return -1;
|
||||
if (state->how == LOOK)
|
||||
return 0;
|
||||
break;
|
||||
case COPY: /* -> COPY */
|
||||
if (gz_load(state, state->out, state->size << 1, &(state->x.have))
|
||||
== -1)
|
||||
return -1;
|
||||
state->x.next = state->out;
|
||||
return 0;
|
||||
case GZIP: /* -> GZIP or LOOK (if end of gzip stream) */
|
||||
strm->avail_out = state->size << 1;
|
||||
strm->next_out = state->out;
|
||||
if (gz_decomp(state) == -1)
|
||||
return -1;
|
||||
}
|
||||
} while (state->x.have == 0 && (!state->eof || strm->avail_in));
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Skip len uncompressed bytes of output. Return -1 on error, 0 on success. */
|
||||
local int gz_skip(state, len)
|
||||
gz_statep state;
|
||||
z_off64_t len;
|
||||
{
|
||||
unsigned n;
|
||||
|
||||
/* skip over len bytes or reach end-of-file, whichever comes first */
|
||||
while (len)
|
||||
/* skip over whatever is in output buffer */
|
||||
if (state->x.have) {
|
||||
n = GT_OFF(state->x.have) || (z_off64_t)state->x.have > len ?
|
||||
(unsigned)len : state->x.have;
|
||||
state->x.have -= n;
|
||||
state->x.next += n;
|
||||
state->x.pos += n;
|
||||
len -= n;
|
||||
}
|
||||
|
||||
/* output buffer empty -- return if we're at the end of the input */
|
||||
else if (state->eof && state->strm.avail_in == 0)
|
||||
break;
|
||||
|
||||
/* need more data to skip -- load up output buffer */
|
||||
else {
|
||||
/* get more output, looking for header if required */
|
||||
if (gz_fetch(state) == -1)
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORT gzread(file, buf, len)
|
||||
gzFile file;
|
||||
voidp buf;
|
||||
unsigned len;
|
||||
{
|
||||
unsigned got, n;
|
||||
gz_statep state;
|
||||
z_streamp strm;
|
||||
|
||||
/* get internal structure */
|
||||
if (file == NULL)
|
||||
return -1;
|
||||
state = (gz_statep)file;
|
||||
strm = &(state->strm);
|
||||
|
||||
/* check that we're reading and that there's no (serious) error */
|
||||
if (state->mode != GZ_READ ||
|
||||
(state->err != Z_OK && state->err != Z_BUF_ERROR))
|
||||
return -1;
|
||||
|
||||
/* since an int is returned, make sure len fits in one, otherwise return
|
||||
with an error (this avoids the flaw in the interface) */
|
||||
if ((int)len < 0) {
|
||||
gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* if len is zero, avoid unnecessary operations */
|
||||
if (len == 0)
|
||||
return 0;
|
||||
|
||||
/* process a skip request */
|
||||
if (state->seek) {
|
||||
state->seek = 0;
|
||||
if (gz_skip(state, state->skip) == -1)
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* get len bytes to buf, or less than len if at the end */
|
||||
got = 0;
|
||||
do {
|
||||
/* first just try copying data from the output buffer */
|
||||
if (state->x.have) {
|
||||
n = state->x.have > len ? len : state->x.have;
|
||||
memcpy(buf, state->x.next, n);
|
||||
state->x.next += n;
|
||||
state->x.have -= n;
|
||||
}
|
||||
|
||||
/* output buffer empty -- return if we're at the end of the input */
|
||||
else if (state->eof && strm->avail_in == 0) {
|
||||
state->past = 1; /* tried to read past end */
|
||||
break;
|
||||
}
|
||||
|
||||
/* need output data -- for small len or new stream load up our output
|
||||
buffer */
|
||||
else if (state->how == LOOK || len < (state->size << 1)) {
|
||||
/* get more output, looking for header if required */
|
||||
if (gz_fetch(state) == -1)
|
||||
return -1;
|
||||
continue; /* no progress yet -- go back to copy above */
|
||||
/* the copy above assures that we will leave with space in the
|
||||
output buffer, allowing at least one gzungetc() to succeed */
|
||||
}
|
||||
|
||||
/* large len -- read directly into user buffer */
|
||||
else if (state->how == COPY) { /* read directly */
|
||||
if (gz_load(state, (unsigned char *)buf, len, &n) == -1)
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* large len -- decompress directly into user buffer */
|
||||
else { /* state->how == GZIP */
|
||||
strm->avail_out = len;
|
||||
strm->next_out = (unsigned char *)buf;
|
||||
if (gz_decomp(state) == -1)
|
||||
return -1;
|
||||
n = state->x.have;
|
||||
state->x.have = 0;
|
||||
}
|
||||
|
||||
/* update progress */
|
||||
len -= n;
|
||||
buf = (char *)buf + n;
|
||||
got += n;
|
||||
state->x.pos += n;
|
||||
} while (len);
|
||||
|
||||
/* return number of bytes read into user buffer (will fit in int) */
|
||||
return (int)got;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
#ifdef Z_PREFIX_SET
|
||||
# undef z_gzgetc
|
||||
#else
|
||||
# undef gzgetc
|
||||
#endif
|
||||
int ZEXPORT gzgetc(file)
|
||||
gzFile file;
|
||||
{
|
||||
int ret;
|
||||
unsigned char buf[1];
|
||||
gz_statep state;
|
||||
|
||||
/* get internal structure */
|
||||
if (file == NULL)
|
||||
return -1;
|
||||
state = (gz_statep)file;
|
||||
|
||||
/* check that we're reading and that there's no (serious) error */
|
||||
if (state->mode != GZ_READ ||
|
||||
(state->err != Z_OK && state->err != Z_BUF_ERROR))
|
||||
return -1;
|
||||
|
||||
/* try output buffer (no need to check for skip request) */
|
||||
if (state->x.have) {
|
||||
state->x.have--;
|
||||
state->x.pos++;
|
||||
return *(state->x.next)++;
|
||||
}
|
||||
|
||||
/* nothing there -- try gzread() */
|
||||
ret = gzread(file, buf, 1);
|
||||
return ret < 1 ? -1 : buf[0];
|
||||
}
|
||||
|
||||
int ZEXPORT gzgetc_(file)
|
||||
gzFile file;
|
||||
{
|
||||
return gzgetc(file);
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORT gzungetc(c, file)
|
||||
int c;
|
||||
gzFile file;
|
||||
{
|
||||
gz_statep state;
|
||||
|
||||
/* get internal structure */
|
||||
if (file == NULL)
|
||||
return -1;
|
||||
state = (gz_statep)file;
|
||||
|
||||
/* check that we're reading and that there's no (serious) error */
|
||||
if (state->mode != GZ_READ ||
|
||||
(state->err != Z_OK && state->err != Z_BUF_ERROR))
|
||||
return -1;
|
||||
|
||||
/* process a skip request */
|
||||
if (state->seek) {
|
||||
state->seek = 0;
|
||||
if (gz_skip(state, state->skip) == -1)
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* can't push EOF */
|
||||
if (c < 0)
|
||||
return -1;
|
||||
|
||||
/* if output buffer empty, put byte at end (allows more pushing) */
|
||||
if (state->x.have == 0) {
|
||||
state->x.have = 1;
|
||||
state->x.next = state->out + (state->size << 1) - 1;
|
||||
state->x.next[0] = c;
|
||||
state->x.pos--;
|
||||
state->past = 0;
|
||||
return c;
|
||||
}
|
||||
|
||||
/* if no room, give up (must have already done a gzungetc()) */
|
||||
if (state->x.have == (state->size << 1)) {
|
||||
gz_error(state, Z_DATA_ERROR, "out of room to push characters");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* slide output data if needed and insert byte before existing data */
|
||||
if (state->x.next == state->out) {
|
||||
unsigned char *src = state->out + state->x.have;
|
||||
unsigned char *dest = state->out + (state->size << 1);
|
||||
while (src > state->out)
|
||||
*--dest = *--src;
|
||||
state->x.next = dest;
|
||||
}
|
||||
state->x.have++;
|
||||
state->x.next--;
|
||||
state->x.next[0] = c;
|
||||
state->x.pos--;
|
||||
state->past = 0;
|
||||
return c;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
char * ZEXPORT gzgets(file, buf, len)
|
||||
gzFile file;
|
||||
char *buf;
|
||||
int len;
|
||||
{
|
||||
unsigned left, n;
|
||||
char *str;
|
||||
unsigned char *eol;
|
||||
gz_statep state;
|
||||
|
||||
/* check parameters and get internal structure */
|
||||
if (file == NULL || buf == NULL || len < 1)
|
||||
return NULL;
|
||||
state = (gz_statep)file;
|
||||
|
||||
/* check that we're reading and that there's no (serious) error */
|
||||
if (state->mode != GZ_READ ||
|
||||
(state->err != Z_OK && state->err != Z_BUF_ERROR))
|
||||
return NULL;
|
||||
|
||||
/* process a skip request */
|
||||
if (state->seek) {
|
||||
state->seek = 0;
|
||||
if (gz_skip(state, state->skip) == -1)
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* copy output bytes up to new line or len - 1, whichever comes first --
|
||||
append a terminating zero to the string (we don't check for a zero in
|
||||
the contents, let the user worry about that) */
|
||||
str = buf;
|
||||
left = (unsigned)len - 1;
|
||||
if (left) do {
|
||||
/* assure that something is in the output buffer */
|
||||
if (state->x.have == 0 && gz_fetch(state) == -1)
|
||||
return NULL; /* error */
|
||||
if (state->x.have == 0) { /* end of file */
|
||||
state->past = 1; /* read past end */
|
||||
break; /* return what we have */
|
||||
}
|
||||
|
||||
/* look for end-of-line in current output buffer */
|
||||
n = state->x.have > left ? left : state->x.have;
|
||||
eol = (unsigned char *)memchr(state->x.next, '\n', n);
|
||||
if (eol != NULL)
|
||||
n = (unsigned)(eol - state->x.next) + 1;
|
||||
|
||||
/* copy through end-of-line, or remainder if not found */
|
||||
memcpy(buf, state->x.next, n);
|
||||
state->x.have -= n;
|
||||
state->x.next += n;
|
||||
state->x.pos += n;
|
||||
left -= n;
|
||||
buf += n;
|
||||
} while (left && eol == NULL);
|
||||
|
||||
/* return terminated string, or if nothing, end of file */
|
||||
if (buf == str)
|
||||
return NULL;
|
||||
buf[0] = 0;
|
||||
return str;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORT gzdirect(file)
|
||||
gzFile file;
|
||||
{
|
||||
gz_statep state;
|
||||
|
||||
/* get internal structure */
|
||||
if (file == NULL)
|
||||
return 0;
|
||||
state = (gz_statep)file;
|
||||
|
||||
/* if the state is not known, but we can find out, then do so (this is
|
||||
mainly for right after a gzopen() or gzdopen()) */
|
||||
if (state->mode == GZ_READ && state->how == LOOK && state->x.have == 0)
|
||||
(void)gz_look(state);
|
||||
|
||||
/* return 1 if transparent, 0 if processing a gzip stream */
|
||||
return state->direct;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORT gzclose_r(file)
|
||||
gzFile file;
|
||||
{
|
||||
int ret, err;
|
||||
gz_statep state;
|
||||
|
||||
/* get internal structure */
|
||||
if (file == NULL)
|
||||
return Z_STREAM_ERROR;
|
||||
state = (gz_statep)file;
|
||||
|
||||
/* check that we're reading */
|
||||
if (state->mode != GZ_READ)
|
||||
return Z_STREAM_ERROR;
|
||||
|
||||
/* free memory and close file */
|
||||
if (state->size) {
|
||||
inflateEnd(&(state->strm));
|
||||
free(state->out);
|
||||
free(state->in);
|
||||
}
|
||||
err = state->err == Z_BUF_ERROR ? Z_BUF_ERROR : Z_OK;
|
||||
gz_error(state, Z_OK, NULL);
|
||||
free(state->path);
|
||||
ret = close(state->fd);
|
||||
free(state);
|
||||
return ret ? Z_ERRNO : err;
|
||||
}
|
||||
577
zlib-1.2.8/gzwrite.c
Executable file
577
zlib-1.2.8/gzwrite.c
Executable file
@ -0,0 +1,577 @@
|
||||
/* gzwrite.c -- zlib functions for writing gzip files
|
||||
* Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
#include "gzguts.h"
|
||||
|
||||
/* Local functions */
|
||||
local int gz_init OF((gz_statep));
|
||||
local int gz_comp OF((gz_statep, int));
|
||||
local int gz_zero OF((gz_statep, z_off64_t));
|
||||
|
||||
/* Initialize state for writing a gzip file. Mark initialization by setting
|
||||
state->size to non-zero. Return -1 on failure or 0 on success. */
|
||||
local int gz_init(state)
|
||||
gz_statep state;
|
||||
{
|
||||
int ret;
|
||||
z_streamp strm = &(state->strm);
|
||||
|
||||
/* allocate input buffer */
|
||||
state->in = (unsigned char *)malloc(state->want);
|
||||
if (state->in == NULL) {
|
||||
gz_error(state, Z_MEM_ERROR, "out of memory");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* only need output buffer and deflate state if compressing */
|
||||
if (!state->direct) {
|
||||
/* allocate output buffer */
|
||||
state->out = (unsigned char *)malloc(state->want);
|
||||
if (state->out == NULL) {
|
||||
free(state->in);
|
||||
gz_error(state, Z_MEM_ERROR, "out of memory");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* allocate deflate memory, set up for gzip compression */
|
||||
strm->zalloc = Z_NULL;
|
||||
strm->zfree = Z_NULL;
|
||||
strm->opaque = Z_NULL;
|
||||
ret = deflateInit2(strm, state->level, Z_DEFLATED,
|
||||
MAX_WBITS + 16, DEF_MEM_LEVEL, state->strategy);
|
||||
if (ret != Z_OK) {
|
||||
free(state->out);
|
||||
free(state->in);
|
||||
gz_error(state, Z_MEM_ERROR, "out of memory");
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
/* mark state as initialized */
|
||||
state->size = state->want;
|
||||
|
||||
/* initialize write buffer if compressing */
|
||||
if (!state->direct) {
|
||||
strm->avail_out = state->size;
|
||||
strm->next_out = state->out;
|
||||
state->x.next = strm->next_out;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Compress whatever is at avail_in and next_in and write to the output file.
|
||||
Return -1 if there is an error writing to the output file, otherwise 0.
|
||||
flush is assumed to be a valid deflate() flush value. If flush is Z_FINISH,
|
||||
then the deflate() state is reset to start a new gzip stream. If gz->direct
|
||||
is true, then simply write to the output file without compressing, and
|
||||
ignore flush. */
|
||||
local int gz_comp(state, flush)
|
||||
gz_statep state;
|
||||
int flush;
|
||||
{
|
||||
int ret, got;
|
||||
unsigned have;
|
||||
z_streamp strm = &(state->strm);
|
||||
|
||||
/* allocate memory if this is the first time through */
|
||||
if (state->size == 0 && gz_init(state) == -1)
|
||||
return -1;
|
||||
|
||||
/* write directly if requested */
|
||||
if (state->direct) {
|
||||
got = write(state->fd, strm->next_in, strm->avail_in);
|
||||
if (got < 0 || (unsigned)got != strm->avail_in) {
|
||||
gz_error(state, Z_ERRNO, zstrerror());
|
||||
return -1;
|
||||
}
|
||||
strm->avail_in = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* run deflate() on provided input until it produces no more output */
|
||||
ret = Z_OK;
|
||||
do {
|
||||
/* write out current buffer contents if full, or if flushing, but if
|
||||
doing Z_FINISH then don't write until we get to Z_STREAM_END */
|
||||
if (strm->avail_out == 0 || (flush != Z_NO_FLUSH &&
|
||||
(flush != Z_FINISH || ret == Z_STREAM_END))) {
|
||||
have = (unsigned)(strm->next_out - state->x.next);
|
||||
if (have && ((got = write(state->fd, state->x.next, have)) < 0 ||
|
||||
(unsigned)got != have)) {
|
||||
gz_error(state, Z_ERRNO, zstrerror());
|
||||
return -1;
|
||||
}
|
||||
if (strm->avail_out == 0) {
|
||||
strm->avail_out = state->size;
|
||||
strm->next_out = state->out;
|
||||
}
|
||||
state->x.next = strm->next_out;
|
||||
}
|
||||
|
||||
/* compress */
|
||||
have = strm->avail_out;
|
||||
ret = deflate(strm, flush);
|
||||
if (ret == Z_STREAM_ERROR) {
|
||||
gz_error(state, Z_STREAM_ERROR,
|
||||
"internal error: deflate stream corrupt");
|
||||
return -1;
|
||||
}
|
||||
have -= strm->avail_out;
|
||||
} while (have);
|
||||
|
||||
/* if that completed a deflate stream, allow another to start */
|
||||
if (flush == Z_FINISH)
|
||||
deflateReset(strm);
|
||||
|
||||
/* all done, no errors */
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Compress len zeros to output. Return -1 on error, 0 on success. */
|
||||
local int gz_zero(state, len)
|
||||
gz_statep state;
|
||||
z_off64_t len;
|
||||
{
|
||||
int first;
|
||||
unsigned n;
|
||||
z_streamp strm = &(state->strm);
|
||||
|
||||
/* consume whatever's left in the input buffer */
|
||||
if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
|
||||
return -1;
|
||||
|
||||
/* compress len zeros (len guaranteed > 0) */
|
||||
first = 1;
|
||||
while (len) {
|
||||
n = GT_OFF(state->size) || (z_off64_t)state->size > len ?
|
||||
(unsigned)len : state->size;
|
||||
if (first) {
|
||||
memset(state->in, 0, n);
|
||||
first = 0;
|
||||
}
|
||||
strm->avail_in = n;
|
||||
strm->next_in = state->in;
|
||||
state->x.pos += n;
|
||||
if (gz_comp(state, Z_NO_FLUSH) == -1)
|
||||
return -1;
|
||||
len -= n;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORT gzwrite(file, buf, len)
|
||||
gzFile file;
|
||||
voidpc buf;
|
||||
unsigned len;
|
||||
{
|
||||
unsigned put = len;
|
||||
gz_statep state;
|
||||
z_streamp strm;
|
||||
|
||||
/* get internal structure */
|
||||
if (file == NULL)
|
||||
return 0;
|
||||
state = (gz_statep)file;
|
||||
strm = &(state->strm);
|
||||
|
||||
/* check that we're writing and that there's no error */
|
||||
if (state->mode != GZ_WRITE || state->err != Z_OK)
|
||||
return 0;
|
||||
|
||||
/* since an int is returned, make sure len fits in one, otherwise return
|
||||
with an error (this avoids the flaw in the interface) */
|
||||
if ((int)len < 0) {
|
||||
gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* if len is zero, avoid unnecessary operations */
|
||||
if (len == 0)
|
||||
return 0;
|
||||
|
||||
/* allocate memory if this is the first time through */
|
||||
if (state->size == 0 && gz_init(state) == -1)
|
||||
return 0;
|
||||
|
||||
/* check for seek request */
|
||||
if (state->seek) {
|
||||
state->seek = 0;
|
||||
if (gz_zero(state, state->skip) == -1)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* for small len, copy to input buffer, otherwise compress directly */
|
||||
if (len < state->size) {
|
||||
/* copy to input buffer, compress when full */
|
||||
do {
|
||||
unsigned have, copy;
|
||||
|
||||
if (strm->avail_in == 0)
|
||||
strm->next_in = state->in;
|
||||
have = (unsigned)((strm->next_in + strm->avail_in) - state->in);
|
||||
copy = state->size - have;
|
||||
if (copy > len)
|
||||
copy = len;
|
||||
memcpy(state->in + have, buf, copy);
|
||||
strm->avail_in += copy;
|
||||
state->x.pos += copy;
|
||||
buf = (const char *)buf + copy;
|
||||
len -= copy;
|
||||
if (len && gz_comp(state, Z_NO_FLUSH) == -1)
|
||||
return 0;
|
||||
} while (len);
|
||||
}
|
||||
else {
|
||||
/* consume whatever's left in the input buffer */
|
||||
if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
|
||||
return 0;
|
||||
|
||||
/* directly compress user buffer to file */
|
||||
strm->avail_in = len;
|
||||
strm->next_in = (z_const Bytef *)buf;
|
||||
state->x.pos += len;
|
||||
if (gz_comp(state, Z_NO_FLUSH) == -1)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* input was all buffered or compressed (put will fit in int) */
|
||||
return (int)put;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORT gzputc(file, c)
|
||||
gzFile file;
|
||||
int c;
|
||||
{
|
||||
unsigned have;
|
||||
unsigned char buf[1];
|
||||
gz_statep state;
|
||||
z_streamp strm;
|
||||
|
||||
/* get internal structure */
|
||||
if (file == NULL)
|
||||
return -1;
|
||||
state = (gz_statep)file;
|
||||
strm = &(state->strm);
|
||||
|
||||
/* check that we're writing and that there's no error */
|
||||
if (state->mode != GZ_WRITE || state->err != Z_OK)
|
||||
return -1;
|
||||
|
||||
/* check for seek request */
|
||||
if (state->seek) {
|
||||
state->seek = 0;
|
||||
if (gz_zero(state, state->skip) == -1)
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* try writing to input buffer for speed (state->size == 0 if buffer not
|
||||
initialized) */
|
||||
if (state->size) {
|
||||
if (strm->avail_in == 0)
|
||||
strm->next_in = state->in;
|
||||
have = (unsigned)((strm->next_in + strm->avail_in) - state->in);
|
||||
if (have < state->size) {
|
||||
state->in[have] = c;
|
||||
strm->avail_in++;
|
||||
state->x.pos++;
|
||||
return c & 0xff;
|
||||
}
|
||||
}
|
||||
|
||||
/* no room in buffer or not initialized, use gz_write() */
|
||||
buf[0] = c;
|
||||
if (gzwrite(file, buf, 1) != 1)
|
||||
return -1;
|
||||
return c & 0xff;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORT gzputs(file, str)
|
||||
gzFile file;
|
||||
const char *str;
|
||||
{
|
||||
int ret;
|
||||
unsigned len;
|
||||
|
||||
/* write string */
|
||||
len = (unsigned)strlen(str);
|
||||
ret = gzwrite(file, str, len);
|
||||
return ret == 0 && len != 0 ? -1 : ret;
|
||||
}
|
||||
|
||||
#if defined(STDC) || defined(Z_HAVE_STDARG_H)
|
||||
#include <stdarg.h>
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va)
|
||||
{
|
||||
int size, len;
|
||||
gz_statep state;
|
||||
z_streamp strm;
|
||||
|
||||
/* get internal structure */
|
||||
if (file == NULL)
|
||||
return -1;
|
||||
state = (gz_statep)file;
|
||||
strm = &(state->strm);
|
||||
|
||||
/* check that we're writing and that there's no error */
|
||||
if (state->mode != GZ_WRITE || state->err != Z_OK)
|
||||
return 0;
|
||||
|
||||
/* make sure we have some buffer space */
|
||||
if (state->size == 0 && gz_init(state) == -1)
|
||||
return 0;
|
||||
|
||||
/* check for seek request */
|
||||
if (state->seek) {
|
||||
state->seek = 0;
|
||||
if (gz_zero(state, state->skip) == -1)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* consume whatever's left in the input buffer */
|
||||
if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
|
||||
return 0;
|
||||
|
||||
/* do the printf() into the input buffer, put length in len */
|
||||
size = (int)(state->size);
|
||||
state->in[size - 1] = 0;
|
||||
#ifdef NO_vsnprintf
|
||||
# ifdef HAS_vsprintf_void
|
||||
(void)vsprintf((char *)(state->in), format, va);
|
||||
for (len = 0; len < size; len++)
|
||||
if (state->in[len] == 0) break;
|
||||
# else
|
||||
len = vsprintf((char *)(state->in), format, va);
|
||||
# endif
|
||||
#else
|
||||
# ifdef HAS_vsnprintf_void
|
||||
(void)vsnprintf((char *)(state->in), size, format, va);
|
||||
len = strlen((char *)(state->in));
|
||||
# else
|
||||
len = vsnprintf((char *)(state->in), size, format, va);
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* check that printf() results fit in buffer */
|
||||
if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)
|
||||
return 0;
|
||||
|
||||
/* update buffer and position, defer compression until needed */
|
||||
strm->avail_in = (unsigned)len;
|
||||
strm->next_in = state->in;
|
||||
state->x.pos += len;
|
||||
return len;
|
||||
}
|
||||
|
||||
int ZEXPORTVA gzprintf(gzFile file, const char *format, ...)
|
||||
{
|
||||
va_list va;
|
||||
int ret;
|
||||
|
||||
va_start(va, format);
|
||||
ret = gzvprintf(file, format, va);
|
||||
va_end(va);
|
||||
return ret;
|
||||
}
|
||||
|
||||
#else /* !STDC && !Z_HAVE_STDARG_H */
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
|
||||
a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)
|
||||
gzFile file;
|
||||
const char *format;
|
||||
int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
|
||||
a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
|
||||
{
|
||||
int size, len;
|
||||
gz_statep state;
|
||||
z_streamp strm;
|
||||
|
||||
/* get internal structure */
|
||||
if (file == NULL)
|
||||
return -1;
|
||||
state = (gz_statep)file;
|
||||
strm = &(state->strm);
|
||||
|
||||
/* check that can really pass pointer in ints */
|
||||
if (sizeof(int) != sizeof(void *))
|
||||
return 0;
|
||||
|
||||
/* check that we're writing and that there's no error */
|
||||
if (state->mode != GZ_WRITE || state->err != Z_OK)
|
||||
return 0;
|
||||
|
||||
/* make sure we have some buffer space */
|
||||
if (state->size == 0 && gz_init(state) == -1)
|
||||
return 0;
|
||||
|
||||
/* check for seek request */
|
||||
if (state->seek) {
|
||||
state->seek = 0;
|
||||
if (gz_zero(state, state->skip) == -1)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* consume whatever's left in the input buffer */
|
||||
if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
|
||||
return 0;
|
||||
|
||||
/* do the printf() into the input buffer, put length in len */
|
||||
size = (int)(state->size);
|
||||
state->in[size - 1] = 0;
|
||||
#ifdef NO_snprintf
|
||||
# ifdef HAS_sprintf_void
|
||||
sprintf((char *)(state->in), format, a1, a2, a3, a4, a5, a6, a7, a8,
|
||||
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
|
||||
for (len = 0; len < size; len++)
|
||||
if (state->in[len] == 0) break;
|
||||
# else
|
||||
len = sprintf((char *)(state->in), format, a1, a2, a3, a4, a5, a6, a7, a8,
|
||||
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
|
||||
# endif
|
||||
#else
|
||||
# ifdef HAS_snprintf_void
|
||||
snprintf((char *)(state->in), size, format, a1, a2, a3, a4, a5, a6, a7, a8,
|
||||
a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
|
||||
len = strlen((char *)(state->in));
|
||||
# else
|
||||
len = snprintf((char *)(state->in), size, format, a1, a2, a3, a4, a5, a6,
|
||||
a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18,
|
||||
a19, a20);
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* check that printf() results fit in buffer */
|
||||
if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)
|
||||
return 0;
|
||||
|
||||
/* update buffer and position, defer compression until needed */
|
||||
strm->avail_in = (unsigned)len;
|
||||
strm->next_in = state->in;
|
||||
state->x.pos += len;
|
||||
return len;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORT gzflush(file, flush)
|
||||
gzFile file;
|
||||
int flush;
|
||||
{
|
||||
gz_statep state;
|
||||
|
||||
/* get internal structure */
|
||||
if (file == NULL)
|
||||
return -1;
|
||||
state = (gz_statep)file;
|
||||
|
||||
/* check that we're writing and that there's no error */
|
||||
if (state->mode != GZ_WRITE || state->err != Z_OK)
|
||||
return Z_STREAM_ERROR;
|
||||
|
||||
/* check flush parameter */
|
||||
if (flush < 0 || flush > Z_FINISH)
|
||||
return Z_STREAM_ERROR;
|
||||
|
||||
/* check for seek request */
|
||||
if (state->seek) {
|
||||
state->seek = 0;
|
||||
if (gz_zero(state, state->skip) == -1)
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* compress remaining data with requested flush */
|
||||
gz_comp(state, flush);
|
||||
return state->err;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORT gzsetparams(file, level, strategy)
|
||||
gzFile file;
|
||||
int level;
|
||||
int strategy;
|
||||
{
|
||||
gz_statep state;
|
||||
z_streamp strm;
|
||||
|
||||
/* get internal structure */
|
||||
if (file == NULL)
|
||||
return Z_STREAM_ERROR;
|
||||
state = (gz_statep)file;
|
||||
strm = &(state->strm);
|
||||
|
||||
/* check that we're writing and that there's no error */
|
||||
if (state->mode != GZ_WRITE || state->err != Z_OK)
|
||||
return Z_STREAM_ERROR;
|
||||
|
||||
/* if no change is requested, then do nothing */
|
||||
if (level == state->level && strategy == state->strategy)
|
||||
return Z_OK;
|
||||
|
||||
/* check for seek request */
|
||||
if (state->seek) {
|
||||
state->seek = 0;
|
||||
if (gz_zero(state, state->skip) == -1)
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* change compression parameters for subsequent input */
|
||||
if (state->size) {
|
||||
/* flush previous input with previous parameters before changing */
|
||||
if (strm->avail_in && gz_comp(state, Z_PARTIAL_FLUSH) == -1)
|
||||
return state->err;
|
||||
deflateParams(strm, level, strategy);
|
||||
}
|
||||
state->level = level;
|
||||
state->strategy = strategy;
|
||||
return Z_OK;
|
||||
}
|
||||
|
||||
/* -- see zlib.h -- */
|
||||
int ZEXPORT gzclose_w(file)
|
||||
gzFile file;
|
||||
{
|
||||
int ret = Z_OK;
|
||||
gz_statep state;
|
||||
|
||||
/* get internal structure */
|
||||
if (file == NULL)
|
||||
return Z_STREAM_ERROR;
|
||||
state = (gz_statep)file;
|
||||
|
||||
/* check that we're writing */
|
||||
if (state->mode != GZ_WRITE)
|
||||
return Z_STREAM_ERROR;
|
||||
|
||||
/* check for seek request */
|
||||
if (state->seek) {
|
||||
state->seek = 0;
|
||||
if (gz_zero(state, state->skip) == -1)
|
||||
ret = state->err;
|
||||
}
|
||||
|
||||
/* flush, free memory, and close file */
|
||||
if (gz_comp(state, Z_FINISH) == -1)
|
||||
ret = state->err;
|
||||
if (state->size) {
|
||||
if (!state->direct) {
|
||||
(void)deflateEnd(&(state->strm));
|
||||
free(state->out);
|
||||
}
|
||||
free(state->in);
|
||||
}
|
||||
gz_error(state, Z_OK, NULL);
|
||||
free(state->path);
|
||||
if (close(state->fd) == -1)
|
||||
ret = Z_ERRNO;
|
||||
free(state);
|
||||
return ret;
|
||||
}
|
||||
640
zlib-1.2.8/infback.c
Executable file
640
zlib-1.2.8/infback.c
Executable file
@ -0,0 +1,640 @@
|
||||
/* infback.c -- inflate using a call-back interface
|
||||
* Copyright (C) 1995-2011 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/*
|
||||
This code is largely copied from inflate.c. Normally either infback.o or
|
||||
inflate.o would be linked into an application--not both. The interface
|
||||
with inffast.c is retained so that optimized assembler-coded versions of
|
||||
inflate_fast() can be used with either inflate.c or infback.c.
|
||||
*/
|
||||
|
||||
#include "zutil.h"
|
||||
#include "inftrees.h"
|
||||
#include "inflate.h"
|
||||
#include "inffast.h"
|
||||
|
||||
/* function prototypes */
|
||||
local void fixedtables OF((struct inflate_state FAR *state));
|
||||
|
||||
/*
|
||||
strm provides memory allocation functions in zalloc and zfree, or
|
||||
Z_NULL to use the library memory allocation functions.
|
||||
|
||||
windowBits is in the range 8..15, and window is a user-supplied
|
||||
window and output buffer that is 2**windowBits bytes.
|
||||
*/
|
||||
int ZEXPORT inflateBackInit_(strm, windowBits, window, version, stream_size)
|
||||
z_streamp strm;
|
||||
int windowBits;
|
||||
unsigned char FAR *window;
|
||||
const char *version;
|
||||
int stream_size;
|
||||
{
|
||||
struct inflate_state FAR *state;
|
||||
|
||||
if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
|
||||
stream_size != (int)(sizeof(z_stream)))
|
||||
return Z_VERSION_ERROR;
|
||||
if (strm == Z_NULL || window == Z_NULL ||
|
||||
windowBits < 8 || windowBits > 15)
|
||||
return Z_STREAM_ERROR;
|
||||
strm->msg = Z_NULL; /* in case we return an error */
|
||||
if (strm->zalloc == (alloc_func)0) {
|
||||
#ifdef Z_SOLO
|
||||
return Z_STREAM_ERROR;
|
||||
#else
|
||||
strm->zalloc = zcalloc;
|
||||
strm->opaque = (voidpf)0;
|
||||
#endif
|
||||
}
|
||||
if (strm->zfree == (free_func)0)
|
||||
#ifdef Z_SOLO
|
||||
return Z_STREAM_ERROR;
|
||||
#else
|
||||
strm->zfree = zcfree;
|
||||
#endif
|
||||
state = (struct inflate_state FAR *)ZALLOC(strm, 1,
|
||||
sizeof(struct inflate_state));
|
||||
if (state == Z_NULL) return Z_MEM_ERROR;
|
||||
Tracev((stderr, "inflate: allocated\n"));
|
||||
strm->state = (struct internal_state FAR *)state;
|
||||
state->dmax = 32768U;
|
||||
state->wbits = windowBits;
|
||||
state->wsize = 1U << windowBits;
|
||||
state->window = window;
|
||||
state->wnext = 0;
|
||||
state->whave = 0;
|
||||
return Z_OK;
|
||||
}
|
||||
|
||||
/*
|
||||
Return state with length and distance decoding tables and index sizes set to
|
||||
fixed code decoding. Normally this returns fixed tables from inffixed.h.
|
||||
If BUILDFIXED is defined, then instead this routine builds the tables the
|
||||
first time it's called, and returns those tables the first time and
|
||||
thereafter. This reduces the size of the code by about 2K bytes, in
|
||||
exchange for a little execution time. However, BUILDFIXED should not be
|
||||
used for threaded applications, since the rewriting of the tables and virgin
|
||||
may not be thread-safe.
|
||||
*/
|
||||
local void fixedtables(state)
|
||||
struct inflate_state FAR *state;
|
||||
{
|
||||
#ifdef BUILDFIXED
|
||||
static int virgin = 1;
|
||||
static code *lenfix, *distfix;
|
||||
static code fixed[544];
|
||||
|
||||
/* build fixed huffman tables if first call (may not be thread safe) */
|
||||
if (virgin) {
|
||||
unsigned sym, bits;
|
||||
static code *next;
|
||||
|
||||
/* literal/length table */
|
||||
sym = 0;
|
||||
while (sym < 144) state->lens[sym++] = 8;
|
||||
while (sym < 256) state->lens[sym++] = 9;
|
||||
while (sym < 280) state->lens[sym++] = 7;
|
||||
while (sym < 288) state->lens[sym++] = 8;
|
||||
next = fixed;
|
||||
lenfix = next;
|
||||
bits = 9;
|
||||
inflate_table(LENS, state->lens, 288, &(next), &(bits), state->work);
|
||||
|
||||
/* distance table */
|
||||
sym = 0;
|
||||
while (sym < 32) state->lens[sym++] = 5;
|
||||
distfix = next;
|
||||
bits = 5;
|
||||
inflate_table(DISTS, state->lens, 32, &(next), &(bits), state->work);
|
||||
|
||||
/* do this just once */
|
||||
virgin = 0;
|
||||
}
|
||||
#else /* !BUILDFIXED */
|
||||
# include "inffixed.h"
|
||||
#endif /* BUILDFIXED */
|
||||
state->lencode = lenfix;
|
||||
state->lenbits = 9;
|
||||
state->distcode = distfix;
|
||||
state->distbits = 5;
|
||||
}
|
||||
|
||||
/* Macros for inflateBack(): */
|
||||
|
||||
/* Load returned state from inflate_fast() */
|
||||
#define LOAD() \
|
||||
do { \
|
||||
put = strm->next_out; \
|
||||
left = strm->avail_out; \
|
||||
next = strm->next_in; \
|
||||
have = strm->avail_in; \
|
||||
hold = state->hold; \
|
||||
bits = state->bits; \
|
||||
} while (0)
|
||||
|
||||
/* Set state from registers for inflate_fast() */
|
||||
#define RESTORE() \
|
||||
do { \
|
||||
strm->next_out = put; \
|
||||
strm->avail_out = left; \
|
||||
strm->next_in = next; \
|
||||
strm->avail_in = have; \
|
||||
state->hold = hold; \
|
||||
state->bits = bits; \
|
||||
} while (0)
|
||||
|
||||
/* Clear the input bit accumulator */
|
||||
#define INITBITS() \
|
||||
do { \
|
||||
hold = 0; \
|
||||
bits = 0; \
|
||||
} while (0)
|
||||
|
||||
/* Assure that some input is available. If input is requested, but denied,
|
||||
then return a Z_BUF_ERROR from inflateBack(). */
|
||||
#define PULL() \
|
||||
do { \
|
||||
if (have == 0) { \
|
||||
have = in(in_desc, &next); \
|
||||
if (have == 0) { \
|
||||
next = Z_NULL; \
|
||||
ret = Z_BUF_ERROR; \
|
||||
goto inf_leave; \
|
||||
} \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
/* Get a byte of input into the bit accumulator, or return from inflateBack()
|
||||
with an error if there is no input available. */
|
||||
#define PULLBYTE() \
|
||||
do { \
|
||||
PULL(); \
|
||||
have--; \
|
||||
hold += (unsigned long)(*next++) << bits; \
|
||||
bits += 8; \
|
||||
} while (0)
|
||||
|
||||
/* Assure that there are at least n bits in the bit accumulator. If there is
|
||||
not enough available input to do that, then return from inflateBack() with
|
||||
an error. */
|
||||
#define NEEDBITS(n) \
|
||||
do { \
|
||||
while (bits < (unsigned)(n)) \
|
||||
PULLBYTE(); \
|
||||
} while (0)
|
||||
|
||||
/* Return the low n bits of the bit accumulator (n < 16) */
|
||||
#define BITS(n) \
|
||||
((unsigned)hold & ((1U << (n)) - 1))
|
||||
|
||||
/* Remove n bits from the bit accumulator */
|
||||
#define DROPBITS(n) \
|
||||
do { \
|
||||
hold >>= (n); \
|
||||
bits -= (unsigned)(n); \
|
||||
} while (0)
|
||||
|
||||
/* Remove zero to seven bits as needed to go to a byte boundary */
|
||||
#define BYTEBITS() \
|
||||
do { \
|
||||
hold >>= bits & 7; \
|
||||
bits -= bits & 7; \
|
||||
} while (0)
|
||||
|
||||
/* Assure that some output space is available, by writing out the window
|
||||
if it's full. If the write fails, return from inflateBack() with a
|
||||
Z_BUF_ERROR. */
|
||||
#define ROOM() \
|
||||
do { \
|
||||
if (left == 0) { \
|
||||
put = state->window; \
|
||||
left = state->wsize; \
|
||||
state->whave = left; \
|
||||
if (out(out_desc, put, left)) { \
|
||||
ret = Z_BUF_ERROR; \
|
||||
goto inf_leave; \
|
||||
} \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
/*
|
||||
strm provides the memory allocation functions and window buffer on input,
|
||||
and provides information on the unused input on return. For Z_DATA_ERROR
|
||||
returns, strm will also provide an error message.
|
||||
|
||||
in() and out() are the call-back input and output functions. When
|
||||
inflateBack() needs more input, it calls in(). When inflateBack() has
|
||||
filled the window with output, or when it completes with data in the
|
||||
window, it calls out() to write out the data. The application must not
|
||||
change the provided input until in() is called again or inflateBack()
|
||||
returns. The application must not change the window/output buffer until
|
||||
inflateBack() returns.
|
||||
|
||||
in() and out() are called with a descriptor parameter provided in the
|
||||
inflateBack() call. This parameter can be a structure that provides the
|
||||
information required to do the read or write, as well as accumulated
|
||||
information on the input and output such as totals and check values.
|
||||
|
||||
in() should return zero on failure. out() should return non-zero on
|
||||
failure. If either in() or out() fails, than inflateBack() returns a
|
||||
Z_BUF_ERROR. strm->next_in can be checked for Z_NULL to see whether it
|
||||
was in() or out() that caused in the error. Otherwise, inflateBack()
|
||||
returns Z_STREAM_END on success, Z_DATA_ERROR for an deflate format
|
||||
error, or Z_MEM_ERROR if it could not allocate memory for the state.
|
||||
inflateBack() can also return Z_STREAM_ERROR if the input parameters
|
||||
are not correct, i.e. strm is Z_NULL or the state was not initialized.
|
||||
*/
|
||||
int ZEXPORT inflateBack(strm, in, in_desc, out, out_desc)
|
||||
z_streamp strm;
|
||||
in_func in;
|
||||
void FAR *in_desc;
|
||||
out_func out;
|
||||
void FAR *out_desc;
|
||||
{
|
||||
struct inflate_state FAR *state;
|
||||
z_const unsigned char FAR *next; /* next input */
|
||||
unsigned char FAR *put; /* next output */
|
||||
unsigned have, left; /* available input and output */
|
||||
unsigned long hold; /* bit buffer */
|
||||
unsigned bits; /* bits in bit buffer */
|
||||
unsigned copy; /* number of stored or match bytes to copy */
|
||||
unsigned char FAR *from; /* where to copy match bytes from */
|
||||
code here; /* current decoding table entry */
|
||||
code last; /* parent table entry */
|
||||
unsigned len; /* length to copy for repeats, bits to drop */
|
||||
int ret; /* return code */
|
||||
static const unsigned short order[19] = /* permutation of code lengths */
|
||||
{16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
|
||||
|
||||
/* Check that the strm exists and that the state was initialized */
|
||||
if (strm == Z_NULL || strm->state == Z_NULL)
|
||||
return Z_STREAM_ERROR;
|
||||
state = (struct inflate_state FAR *)strm->state;
|
||||
|
||||
/* Reset the state */
|
||||
strm->msg = Z_NULL;
|
||||
state->mode = TYPE;
|
||||
state->last = 0;
|
||||
state->whave = 0;
|
||||
next = strm->next_in;
|
||||
have = next != Z_NULL ? strm->avail_in : 0;
|
||||
hold = 0;
|
||||
bits = 0;
|
||||
put = state->window;
|
||||
left = state->wsize;
|
||||
|
||||
/* Inflate until end of block marked as last */
|
||||
for (;;)
|
||||
switch (state->mode) {
|
||||
case TYPE:
|
||||
/* determine and dispatch block type */
|
||||
if (state->last) {
|
||||
BYTEBITS();
|
||||
state->mode = DONE;
|
||||
break;
|
||||
}
|
||||
NEEDBITS(3);
|
||||
state->last = BITS(1);
|
||||
DROPBITS(1);
|
||||
switch (BITS(2)) {
|
||||
case 0: /* stored block */
|
||||
Tracev((stderr, "inflate: stored block%s\n",
|
||||
state->last ? " (last)" : ""));
|
||||
state->mode = STORED;
|
||||
break;
|
||||
case 1: /* fixed block */
|
||||
fixedtables(state);
|
||||
Tracev((stderr, "inflate: fixed codes block%s\n",
|
||||
state->last ? " (last)" : ""));
|
||||
state->mode = LEN; /* decode codes */
|
||||
break;
|
||||
case 2: /* dynamic block */
|
||||
Tracev((stderr, "inflate: dynamic codes block%s\n",
|
||||
state->last ? " (last)" : ""));
|
||||
state->mode = TABLE;
|
||||
break;
|
||||
case 3:
|
||||
strm->msg = (char *)"invalid block type";
|
||||
state->mode = BAD;
|
||||
}
|
||||
DROPBITS(2);
|
||||
break;
|
||||
|
||||
case STORED:
|
||||
/* get and verify stored block length */
|
||||
BYTEBITS(); /* go to byte boundary */
|
||||
NEEDBITS(32);
|
||||
if ((hold & 0xffff) != ((hold >> 16) ^ 0xffff)) {
|
||||
strm->msg = (char *)"invalid stored block lengths";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
state->length = (unsigned)hold & 0xffff;
|
||||
Tracev((stderr, "inflate: stored length %u\n",
|
||||
state->length));
|
||||
INITBITS();
|
||||
|
||||
/* copy stored block from input to output */
|
||||
while (state->length != 0) {
|
||||
copy = state->length;
|
||||
PULL();
|
||||
ROOM();
|
||||
if (copy > have) copy = have;
|
||||
if (copy > left) copy = left;
|
||||
zmemcpy(put, next, copy);
|
||||
have -= copy;
|
||||
next += copy;
|
||||
left -= copy;
|
||||
put += copy;
|
||||
state->length -= copy;
|
||||
}
|
||||
Tracev((stderr, "inflate: stored end\n"));
|
||||
state->mode = TYPE;
|
||||
break;
|
||||
|
||||
case TABLE:
|
||||
/* get dynamic table entries descriptor */
|
||||
NEEDBITS(14);
|
||||
state->nlen = BITS(5) + 257;
|
||||
DROPBITS(5);
|
||||
state->ndist = BITS(5) + 1;
|
||||
DROPBITS(5);
|
||||
state->ncode = BITS(4) + 4;
|
||||
DROPBITS(4);
|
||||
#ifndef PKZIP_BUG_WORKAROUND
|
||||
if (state->nlen > 286 || state->ndist > 30) {
|
||||
strm->msg = (char *)"too many length or distance symbols";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
Tracev((stderr, "inflate: table sizes ok\n"));
|
||||
|
||||
/* get code length code lengths (not a typo) */
|
||||
state->have = 0;
|
||||
while (state->have < state->ncode) {
|
||||
NEEDBITS(3);
|
||||
state->lens[order[state->have++]] = (unsigned short)BITS(3);
|
||||
DROPBITS(3);
|
||||
}
|
||||
while (state->have < 19)
|
||||
state->lens[order[state->have++]] = 0;
|
||||
state->next = state->codes;
|
||||
state->lencode = (code const FAR *)(state->next);
|
||||
state->lenbits = 7;
|
||||
ret = inflate_table(CODES, state->lens, 19, &(state->next),
|
||||
&(state->lenbits), state->work);
|
||||
if (ret) {
|
||||
strm->msg = (char *)"invalid code lengths set";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
Tracev((stderr, "inflate: code lengths ok\n"));
|
||||
|
||||
/* get length and distance code code lengths */
|
||||
state->have = 0;
|
||||
while (state->have < state->nlen + state->ndist) {
|
||||
for (;;) {
|
||||
here = state->lencode[BITS(state->lenbits)];
|
||||
if ((unsigned)(here.bits) <= bits) break;
|
||||
PULLBYTE();
|
||||
}
|
||||
if (here.val < 16) {
|
||||
DROPBITS(here.bits);
|
||||
state->lens[state->have++] = here.val;
|
||||
}
|
||||
else {
|
||||
if (here.val == 16) {
|
||||
NEEDBITS(here.bits + 2);
|
||||
DROPBITS(here.bits);
|
||||
if (state->have == 0) {
|
||||
strm->msg = (char *)"invalid bit length repeat";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
len = (unsigned)(state->lens[state->have - 1]);
|
||||
copy = 3 + BITS(2);
|
||||
DROPBITS(2);
|
||||
}
|
||||
else if (here.val == 17) {
|
||||
NEEDBITS(here.bits + 3);
|
||||
DROPBITS(here.bits);
|
||||
len = 0;
|
||||
copy = 3 + BITS(3);
|
||||
DROPBITS(3);
|
||||
}
|
||||
else {
|
||||
NEEDBITS(here.bits + 7);
|
||||
DROPBITS(here.bits);
|
||||
len = 0;
|
||||
copy = 11 + BITS(7);
|
||||
DROPBITS(7);
|
||||
}
|
||||
if (state->have + copy > state->nlen + state->ndist) {
|
||||
strm->msg = (char *)"invalid bit length repeat";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
while (copy--)
|
||||
state->lens[state->have++] = (unsigned short)len;
|
||||
}
|
||||
}
|
||||
|
||||
/* handle error breaks in while */
|
||||
if (state->mode == BAD) break;
|
||||
|
||||
/* check for end-of-block code (better have one) */
|
||||
if (state->lens[256] == 0) {
|
||||
strm->msg = (char *)"invalid code -- missing end-of-block";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
|
||||
/* build code tables -- note: do not change the lenbits or distbits
|
||||
values here (9 and 6) without reading the comments in inftrees.h
|
||||
concerning the ENOUGH constants, which depend on those values */
|
||||
state->next = state->codes;
|
||||
state->lencode = (code const FAR *)(state->next);
|
||||
state->lenbits = 9;
|
||||
ret = inflate_table(LENS, state->lens, state->nlen, &(state->next),
|
||||
&(state->lenbits), state->work);
|
||||
if (ret) {
|
||||
strm->msg = (char *)"invalid literal/lengths set";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
state->distcode = (code const FAR *)(state->next);
|
||||
state->distbits = 6;
|
||||
ret = inflate_table(DISTS, state->lens + state->nlen, state->ndist,
|
||||
&(state->next), &(state->distbits), state->work);
|
||||
if (ret) {
|
||||
strm->msg = (char *)"invalid distances set";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
Tracev((stderr, "inflate: codes ok\n"));
|
||||
state->mode = LEN;
|
||||
|
||||
case LEN:
|
||||
/* use inflate_fast() if we have enough input and output */
|
||||
if (have >= 6 && left >= 258) {
|
||||
RESTORE();
|
||||
if (state->whave < state->wsize)
|
||||
state->whave = state->wsize - left;
|
||||
inflate_fast(strm, state->wsize);
|
||||
LOAD();
|
||||
break;
|
||||
}
|
||||
|
||||
/* get a literal, length, or end-of-block code */
|
||||
for (;;) {
|
||||
here = state->lencode[BITS(state->lenbits)];
|
||||
if ((unsigned)(here.bits) <= bits) break;
|
||||
PULLBYTE();
|
||||
}
|
||||
if (here.op && (here.op & 0xf0) == 0) {
|
||||
last = here;
|
||||
for (;;) {
|
||||
here = state->lencode[last.val +
|
||||
(BITS(last.bits + last.op) >> last.bits)];
|
||||
if ((unsigned)(last.bits + here.bits) <= bits) break;
|
||||
PULLBYTE();
|
||||
}
|
||||
DROPBITS(last.bits);
|
||||
}
|
||||
DROPBITS(here.bits);
|
||||
state->length = (unsigned)here.val;
|
||||
|
||||
/* process literal */
|
||||
if (here.op == 0) {
|
||||
Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
|
||||
"inflate: literal '%c'\n" :
|
||||
"inflate: literal 0x%02x\n", here.val));
|
||||
ROOM();
|
||||
*put++ = (unsigned char)(state->length);
|
||||
left--;
|
||||
state->mode = LEN;
|
||||
break;
|
||||
}
|
||||
|
||||
/* process end of block */
|
||||
if (here.op & 32) {
|
||||
Tracevv((stderr, "inflate: end of block\n"));
|
||||
state->mode = TYPE;
|
||||
break;
|
||||
}
|
||||
|
||||
/* invalid code */
|
||||
if (here.op & 64) {
|
||||
strm->msg = (char *)"invalid literal/length code";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
|
||||
/* length code -- get extra bits, if any */
|
||||
state->extra = (unsigned)(here.op) & 15;
|
||||
if (state->extra != 0) {
|
||||
NEEDBITS(state->extra);
|
||||
state->length += BITS(state->extra);
|
||||
DROPBITS(state->extra);
|
||||
}
|
||||
Tracevv((stderr, "inflate: length %u\n", state->length));
|
||||
|
||||
/* get distance code */
|
||||
for (;;) {
|
||||
here = state->distcode[BITS(state->distbits)];
|
||||
if ((unsigned)(here.bits) <= bits) break;
|
||||
PULLBYTE();
|
||||
}
|
||||
if ((here.op & 0xf0) == 0) {
|
||||
last = here;
|
||||
for (;;) {
|
||||
here = state->distcode[last.val +
|
||||
(BITS(last.bits + last.op) >> last.bits)];
|
||||
if ((unsigned)(last.bits + here.bits) <= bits) break;
|
||||
PULLBYTE();
|
||||
}
|
||||
DROPBITS(last.bits);
|
||||
}
|
||||
DROPBITS(here.bits);
|
||||
if (here.op & 64) {
|
||||
strm->msg = (char *)"invalid distance code";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
state->offset = (unsigned)here.val;
|
||||
|
||||
/* get distance extra bits, if any */
|
||||
state->extra = (unsigned)(here.op) & 15;
|
||||
if (state->extra != 0) {
|
||||
NEEDBITS(state->extra);
|
||||
state->offset += BITS(state->extra);
|
||||
DROPBITS(state->extra);
|
||||
}
|
||||
if (state->offset > state->wsize - (state->whave < state->wsize ?
|
||||
left : 0)) {
|
||||
strm->msg = (char *)"invalid distance too far back";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
Tracevv((stderr, "inflate: distance %u\n", state->offset));
|
||||
|
||||
/* copy match from window to output */
|
||||
do {
|
||||
ROOM();
|
||||
copy = state->wsize - state->offset;
|
||||
if (copy < left) {
|
||||
from = put + copy;
|
||||
copy = left - copy;
|
||||
}
|
||||
else {
|
||||
from = put - state->offset;
|
||||
copy = left;
|
||||
}
|
||||
if (copy > state->length) copy = state->length;
|
||||
state->length -= copy;
|
||||
left -= copy;
|
||||
do {
|
||||
*put++ = *from++;
|
||||
} while (--copy);
|
||||
} while (state->length != 0);
|
||||
break;
|
||||
|
||||
case DONE:
|
||||
/* inflate stream terminated properly -- write leftover output */
|
||||
ret = Z_STREAM_END;
|
||||
if (left < state->wsize) {
|
||||
if (out(out_desc, state->window, state->wsize - left))
|
||||
ret = Z_BUF_ERROR;
|
||||
}
|
||||
goto inf_leave;
|
||||
|
||||
case BAD:
|
||||
ret = Z_DATA_ERROR;
|
||||
goto inf_leave;
|
||||
|
||||
default: /* can't happen, but makes compilers happy */
|
||||
ret = Z_STREAM_ERROR;
|
||||
goto inf_leave;
|
||||
}
|
||||
|
||||
/* Return unused input */
|
||||
inf_leave:
|
||||
strm->next_in = next;
|
||||
strm->avail_in = have;
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ZEXPORT inflateBackEnd(strm)
|
||||
z_streamp strm;
|
||||
{
|
||||
if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
|
||||
return Z_STREAM_ERROR;
|
||||
ZFREE(strm, strm->state);
|
||||
strm->state = Z_NULL;
|
||||
Tracev((stderr, "inflate: end\n"));
|
||||
return Z_OK;
|
||||
}
|
||||
340
zlib-1.2.8/inffast.c
Executable file
340
zlib-1.2.8/inffast.c
Executable file
@ -0,0 +1,340 @@
|
||||
/* inffast.c -- fast decoding
|
||||
* Copyright (C) 1995-2008, 2010, 2013 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
#include "zutil.h"
|
||||
#include "inftrees.h"
|
||||
#include "inflate.h"
|
||||
#include "inffast.h"
|
||||
|
||||
#ifndef ASMINF
|
||||
|
||||
/* Allow machine dependent optimization for post-increment or pre-increment.
|
||||
Based on testing to date,
|
||||
Pre-increment preferred for:
|
||||
- PowerPC G3 (Adler)
|
||||
- MIPS R5000 (Randers-Pehrson)
|
||||
Post-increment preferred for:
|
||||
- none
|
||||
No measurable difference:
|
||||
- Pentium III (Anderson)
|
||||
- M68060 (Nikl)
|
||||
*/
|
||||
#ifdef POSTINC
|
||||
# define OFF 0
|
||||
# define PUP(a) *(a)++
|
||||
#else
|
||||
# define OFF 1
|
||||
# define PUP(a) *++(a)
|
||||
#endif
|
||||
|
||||
/*
|
||||
Decode literal, length, and distance codes and write out the resulting
|
||||
literal and match bytes until either not enough input or output is
|
||||
available, an end-of-block is encountered, or a data error is encountered.
|
||||
When large enough input and output buffers are supplied to inflate(), for
|
||||
example, a 16K input buffer and a 64K output buffer, more than 95% of the
|
||||
inflate execution time is spent in this routine.
|
||||
|
||||
Entry assumptions:
|
||||
|
||||
state->mode == LEN
|
||||
strm->avail_in >= 6
|
||||
strm->avail_out >= 258
|
||||
start >= strm->avail_out
|
||||
state->bits < 8
|
||||
|
||||
On return, state->mode is one of:
|
||||
|
||||
LEN -- ran out of enough output space or enough available input
|
||||
TYPE -- reached end of block code, inflate() to interpret next block
|
||||
BAD -- error in block data
|
||||
|
||||
Notes:
|
||||
|
||||
- The maximum input bits used by a length/distance pair is 15 bits for the
|
||||
length code, 5 bits for the length extra, 15 bits for the distance code,
|
||||
and 13 bits for the distance extra. This totals 48 bits, or six bytes.
|
||||
Therefore if strm->avail_in >= 6, then there is enough input to avoid
|
||||
checking for available input while decoding.
|
||||
|
||||
- The maximum bytes that a single length/distance pair can output is 258
|
||||
bytes, which is the maximum length that can be coded. inflate_fast()
|
||||
requires strm->avail_out >= 258 for each loop to avoid checking for
|
||||
output space.
|
||||
*/
|
||||
void ZLIB_INTERNAL inflate_fast(strm, start)
|
||||
z_streamp strm;
|
||||
unsigned start; /* inflate()'s starting value for strm->avail_out */
|
||||
{
|
||||
struct inflate_state FAR *state;
|
||||
z_const unsigned char FAR *in; /* local strm->next_in */
|
||||
z_const unsigned char FAR *last; /* have enough input while in < last */
|
||||
unsigned char FAR *out; /* local strm->next_out */
|
||||
unsigned char FAR *beg; /* inflate()'s initial strm->next_out */
|
||||
unsigned char FAR *end; /* while out < end, enough space available */
|
||||
#ifdef INFLATE_STRICT
|
||||
unsigned dmax; /* maximum distance from zlib header */
|
||||
#endif
|
||||
unsigned wsize; /* window size or zero if not using window */
|
||||
unsigned whave; /* valid bytes in the window */
|
||||
unsigned wnext; /* window write index */
|
||||
unsigned char FAR *window; /* allocated sliding window, if wsize != 0 */
|
||||
unsigned long hold; /* local strm->hold */
|
||||
unsigned bits; /* local strm->bits */
|
||||
code const FAR *lcode; /* local strm->lencode */
|
||||
code const FAR *dcode; /* local strm->distcode */
|
||||
unsigned lmask; /* mask for first level of length codes */
|
||||
unsigned dmask; /* mask for first level of distance codes */
|
||||
code here; /* retrieved table entry */
|
||||
unsigned op; /* code bits, operation, extra bits, or */
|
||||
/* window position, window bytes to copy */
|
||||
unsigned len; /* match length, unused bytes */
|
||||
unsigned dist; /* match distance */
|
||||
unsigned char FAR *from; /* where to copy match from */
|
||||
|
||||
/* copy state to local variables */
|
||||
state = (struct inflate_state FAR *)strm->state;
|
||||
in = strm->next_in - OFF;
|
||||
last = in + (strm->avail_in - 5);
|
||||
out = strm->next_out - OFF;
|
||||
beg = out - (start - strm->avail_out);
|
||||
end = out + (strm->avail_out - 257);
|
||||
#ifdef INFLATE_STRICT
|
||||
dmax = state->dmax;
|
||||
#endif
|
||||
wsize = state->wsize;
|
||||
whave = state->whave;
|
||||
wnext = state->wnext;
|
||||
window = state->window;
|
||||
hold = state->hold;
|
||||
bits = state->bits;
|
||||
lcode = state->lencode;
|
||||
dcode = state->distcode;
|
||||
lmask = (1U << state->lenbits) - 1;
|
||||
dmask = (1U << state->distbits) - 1;
|
||||
|
||||
/* decode literals and length/distances until end-of-block or not enough
|
||||
input data or output space */
|
||||
do {
|
||||
if (bits < 15) {
|
||||
hold += (unsigned long)(PUP(in)) << bits;
|
||||
bits += 8;
|
||||
hold += (unsigned long)(PUP(in)) << bits;
|
||||
bits += 8;
|
||||
}
|
||||
here = lcode[hold & lmask];
|
||||
dolen:
|
||||
op = (unsigned)(here.bits);
|
||||
hold >>= op;
|
||||
bits -= op;
|
||||
op = (unsigned)(here.op);
|
||||
if (op == 0) { /* literal */
|
||||
Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
|
||||
"inflate: literal '%c'\n" :
|
||||
"inflate: literal 0x%02x\n", here.val));
|
||||
PUP(out) = (unsigned char)(here.val);
|
||||
}
|
||||
else if (op & 16) { /* length base */
|
||||
len = (unsigned)(here.val);
|
||||
op &= 15; /* number of extra bits */
|
||||
if (op) {
|
||||
if (bits < op) {
|
||||
hold += (unsigned long)(PUP(in)) << bits;
|
||||
bits += 8;
|
||||
}
|
||||
len += (unsigned)hold & ((1U << op) - 1);
|
||||
hold >>= op;
|
||||
bits -= op;
|
||||
}
|
||||
Tracevv((stderr, "inflate: length %u\n", len));
|
||||
if (bits < 15) {
|
||||
hold += (unsigned long)(PUP(in)) << bits;
|
||||
bits += 8;
|
||||
hold += (unsigned long)(PUP(in)) << bits;
|
||||
bits += 8;
|
||||
}
|
||||
here = dcode[hold & dmask];
|
||||
dodist:
|
||||
op = (unsigned)(here.bits);
|
||||
hold >>= op;
|
||||
bits -= op;
|
||||
op = (unsigned)(here.op);
|
||||
if (op & 16) { /* distance base */
|
||||
dist = (unsigned)(here.val);
|
||||
op &= 15; /* number of extra bits */
|
||||
if (bits < op) {
|
||||
hold += (unsigned long)(PUP(in)) << bits;
|
||||
bits += 8;
|
||||
if (bits < op) {
|
||||
hold += (unsigned long)(PUP(in)) << bits;
|
||||
bits += 8;
|
||||
}
|
||||
}
|
||||
dist += (unsigned)hold & ((1U << op) - 1);
|
||||
#ifdef INFLATE_STRICT
|
||||
if (dist > dmax) {
|
||||
strm->msg = (char *)"invalid distance too far back";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
hold >>= op;
|
||||
bits -= op;
|
||||
Tracevv((stderr, "inflate: distance %u\n", dist));
|
||||
op = (unsigned)(out - beg); /* max distance in output */
|
||||
if (dist > op) { /* see if copy from window */
|
||||
op = dist - op; /* distance back in window */
|
||||
if (op > whave) {
|
||||
if (state->sane) {
|
||||
strm->msg =
|
||||
(char *)"invalid distance too far back";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
|
||||
if (len <= op - whave) {
|
||||
do {
|
||||
PUP(out) = 0;
|
||||
} while (--len);
|
||||
continue;
|
||||
}
|
||||
len -= op - whave;
|
||||
do {
|
||||
PUP(out) = 0;
|
||||
} while (--op > whave);
|
||||
if (op == 0) {
|
||||
from = out - dist;
|
||||
do {
|
||||
PUP(out) = PUP(from);
|
||||
} while (--len);
|
||||
continue;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
from = window - OFF;
|
||||
if (wnext == 0) { /* very common case */
|
||||
from += wsize - op;
|
||||
if (op < len) { /* some from window */
|
||||
len -= op;
|
||||
do {
|
||||
PUP(out) = PUP(from);
|
||||
} while (--op);
|
||||
from = out - dist; /* rest from output */
|
||||
}
|
||||
}
|
||||
else if (wnext < op) { /* wrap around window */
|
||||
from += wsize + wnext - op;
|
||||
op -= wnext;
|
||||
if (op < len) { /* some from end of window */
|
||||
len -= op;
|
||||
do {
|
||||
PUP(out) = PUP(from);
|
||||
} while (--op);
|
||||
from = window - OFF;
|
||||
if (wnext < len) { /* some from start of window */
|
||||
op = wnext;
|
||||
len -= op;
|
||||
do {
|
||||
PUP(out) = PUP(from);
|
||||
} while (--op);
|
||||
from = out - dist; /* rest from output */
|
||||
}
|
||||
}
|
||||
}
|
||||
else { /* contiguous in window */
|
||||
from += wnext - op;
|
||||
if (op < len) { /* some from window */
|
||||
len -= op;
|
||||
do {
|
||||
PUP(out) = PUP(from);
|
||||
} while (--op);
|
||||
from = out - dist; /* rest from output */
|
||||
}
|
||||
}
|
||||
while (len > 2) {
|
||||
PUP(out) = PUP(from);
|
||||
PUP(out) = PUP(from);
|
||||
PUP(out) = PUP(from);
|
||||
len -= 3;
|
||||
}
|
||||
if (len) {
|
||||
PUP(out) = PUP(from);
|
||||
if (len > 1)
|
||||
PUP(out) = PUP(from);
|
||||
}
|
||||
}
|
||||
else {
|
||||
from = out - dist; /* copy direct from output */
|
||||
do { /* minimum length is three */
|
||||
PUP(out) = PUP(from);
|
||||
PUP(out) = PUP(from);
|
||||
PUP(out) = PUP(from);
|
||||
len -= 3;
|
||||
} while (len > 2);
|
||||
if (len) {
|
||||
PUP(out) = PUP(from);
|
||||
if (len > 1)
|
||||
PUP(out) = PUP(from);
|
||||
}
|
||||
}
|
||||
}
|
||||
else if ((op & 64) == 0) { /* 2nd level distance code */
|
||||
here = dcode[here.val + (hold & ((1U << op) - 1))];
|
||||
goto dodist;
|
||||
}
|
||||
else {
|
||||
strm->msg = (char *)"invalid distance code";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
}
|
||||
else if ((op & 64) == 0) { /* 2nd level length code */
|
||||
here = lcode[here.val + (hold & ((1U << op) - 1))];
|
||||
goto dolen;
|
||||
}
|
||||
else if (op & 32) { /* end-of-block */
|
||||
Tracevv((stderr, "inflate: end of block\n"));
|
||||
state->mode = TYPE;
|
||||
break;
|
||||
}
|
||||
else {
|
||||
strm->msg = (char *)"invalid literal/length code";
|
||||
state->mode = BAD;
|
||||
break;
|
||||
}
|
||||
} while (in < last && out < end);
|
||||
|
||||
/* return unused bytes (on entry, bits < 8, so in won't go too far back) */
|
||||
len = bits >> 3;
|
||||
in -= len;
|
||||
bits -= len << 3;
|
||||
hold &= (1U << bits) - 1;
|
||||
|
||||
/* update state and return */
|
||||
strm->next_in = in + OFF;
|
||||
strm->next_out = out + OFF;
|
||||
strm->avail_in = (unsigned)(in < last ? 5 + (last - in) : 5 - (in - last));
|
||||
strm->avail_out = (unsigned)(out < end ?
|
||||
257 + (end - out) : 257 - (out - end));
|
||||
state->hold = hold;
|
||||
state->bits = bits;
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
inflate_fast() speedups that turned out slower (on a PowerPC G3 750CXe):
|
||||
- Using bit fields for code structure
|
||||
- Different op definition to avoid & for extra bits (do & for table bits)
|
||||
- Three separate decoding do-loops for direct, window, and wnext == 0
|
||||
- Special case for distance > 1 copies to do overlapped load and store copy
|
||||
- Explicit branch predictions (based on measured branch probabilities)
|
||||
- Deferring match copy and interspersed it with decoding subsequent codes
|
||||
- Swapping literal/length else
|
||||
- Swapping window/direct else
|
||||
- Larger unrolled copy loops (three is about right)
|
||||
- Moving len -= 3 statement into middle of loop
|
||||
*/
|
||||
|
||||
#endif /* !ASMINF */
|
||||
1512
zlib-1.2.8/inflate.c
Executable file
1512
zlib-1.2.8/inflate.c
Executable file
File diff suppressed because it is too large
Load Diff
306
zlib-1.2.8/inftrees.c
Executable file
306
zlib-1.2.8/inftrees.c
Executable file
@ -0,0 +1,306 @@
|
||||
/* inftrees.c -- generate Huffman trees for efficient decoding
|
||||
* Copyright (C) 1995-2013 Mark Adler
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
#include "zutil.h"
|
||||
#include "inftrees.h"
|
||||
|
||||
#define MAXBITS 15
|
||||
|
||||
const char inflate_copyright[] =
|
||||
" inflate 1.2.8 Copyright 1995-2013 Mark Adler ";
|
||||
/*
|
||||
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
|
||||
include such an acknowledgment, I would appreciate that you keep this
|
||||
copyright string in the executable of your product.
|
||||
*/
|
||||
|
||||
/*
|
||||
Build a set of tables to decode the provided canonical Huffman code.
|
||||
The code lengths are lens[0..codes-1]. The result starts at *table,
|
||||
whose indices are 0..2^bits-1. work is a writable array of at least
|
||||
lens shorts, which is used as a work area. type is the type of code
|
||||
to be generated, CODES, LENS, or DISTS. On return, zero is success,
|
||||
-1 is an invalid code, and +1 means that ENOUGH isn't enough. table
|
||||
on return points to the next available entry's address. bits is the
|
||||
requested root table index bits, and on return it is the actual root
|
||||
table index bits. It will differ if the request is greater than the
|
||||
longest code or if it is less than the shortest code.
|
||||
*/
|
||||
int ZLIB_INTERNAL inflate_table(type, lens, codes, table, bits, work)
|
||||
codetype type;
|
||||
unsigned short FAR *lens;
|
||||
unsigned codes;
|
||||
code FAR * FAR *table;
|
||||
unsigned FAR *bits;
|
||||
unsigned short FAR *work;
|
||||
{
|
||||
unsigned len; /* a code's length in bits */
|
||||
unsigned sym; /* index of code symbols */
|
||||
unsigned min, max; /* minimum and maximum code lengths */
|
||||
unsigned root; /* number of index bits for root table */
|
||||
unsigned curr; /* number of index bits for current table */
|
||||
unsigned drop; /* code bits to drop for sub-table */
|
||||
int left; /* number of prefix codes available */
|
||||
unsigned used; /* code entries in table used */
|
||||
unsigned huff; /* Huffman code */
|
||||
unsigned incr; /* for incrementing code, index */
|
||||
unsigned fill; /* index for replicating entries */
|
||||
unsigned low; /* low bits for current root entry */
|
||||
unsigned mask; /* mask for low root bits */
|
||||
code here; /* table entry for duplication */
|
||||
code FAR *next; /* next available space in table */
|
||||
const unsigned short FAR *base; /* base value table to use */
|
||||
const unsigned short FAR *extra; /* extra bits table to use */
|
||||
int end; /* use base and extra for symbol > end */
|
||||
unsigned short count[MAXBITS+1]; /* number of codes of each length */
|
||||
unsigned short offs[MAXBITS+1]; /* offsets in table for each length */
|
||||
static const unsigned short lbase[31] = { /* Length codes 257..285 base */
|
||||
3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
|
||||
35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
|
||||
static const unsigned short lext[31] = { /* Length codes 257..285 extra */
|
||||
16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
|
||||
19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 72, 78};
|
||||
static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
|
||||
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
|
||||
257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
|
||||
8193, 12289, 16385, 24577, 0, 0};
|
||||
static const unsigned short dext[32] = { /* Distance codes 0..29 extra */
|
||||
16, 16, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22,
|
||||
23, 23, 24, 24, 25, 25, 26, 26, 27, 27,
|
||||
28, 28, 29, 29, 64, 64};
|
||||
|
||||
/*
|
||||
Process a set of code lengths to create a canonical Huffman code. The
|
||||
code lengths are lens[0..codes-1]. Each length corresponds to the
|
||||
symbols 0..codes-1. The Huffman code is generated by first sorting the
|
||||
symbols by length from short to long, and retaining the symbol order
|
||||
for codes with equal lengths. Then the code starts with all zero bits
|
||||
for the first code of the shortest length, and the codes are integer
|
||||
increments for the same length, and zeros are appended as the length
|
||||
increases. For the deflate format, these bits are stored backwards
|
||||
from their more natural integer increment ordering, and so when the
|
||||
decoding tables are built in the large loop below, the integer codes
|
||||
are incremented backwards.
|
||||
|
||||
This routine assumes, but does not check, that all of the entries in
|
||||
lens[] are in the range 0..MAXBITS. The caller must assure this.
|
||||
1..MAXBITS is interpreted as that code length. zero means that that
|
||||
symbol does not occur in this code.
|
||||
|
||||
The codes are sorted by computing a count of codes for each length,
|
||||
creating from that a table of starting indices for each length in the
|
||||
sorted table, and then entering the symbols in order in the sorted
|
||||
table. The sorted table is work[], with that space being provided by
|
||||
the caller.
|
||||
|
||||
The length counts are used for other purposes as well, i.e. finding
|
||||
the minimum and maximum length codes, determining if there are any
|
||||
codes at all, checking for a valid set of lengths, and looking ahead
|
||||
at length counts to determine sub-table sizes when building the
|
||||
decoding tables.
|
||||
*/
|
||||
|
||||
/* accumulate lengths for codes (assumes lens[] all in 0..MAXBITS) */
|
||||
for (len = 0; len <= MAXBITS; len++)
|
||||
count[len] = 0;
|
||||
for (sym = 0; sym < codes; sym++)
|
||||
count[lens[sym]]++;
|
||||
|
||||
/* bound code lengths, force root to be within code lengths */
|
||||
root = *bits;
|
||||
for (max = MAXBITS; max >= 1; max--)
|
||||
if (count[max] != 0) break;
|
||||
if (root > max) root = max;
|
||||
if (max == 0) { /* no symbols to code at all */
|
||||
here.op = (unsigned char)64; /* invalid code marker */
|
||||
here.bits = (unsigned char)1;
|
||||
here.val = (unsigned short)0;
|
||||
*(*table)++ = here; /* make a table to force an error */
|
||||
*(*table)++ = here;
|
||||
*bits = 1;
|
||||
return 0; /* no symbols, but wait for decoding to report error */
|
||||
}
|
||||
for (min = 1; min < max; min++)
|
||||
if (count[min] != 0) break;
|
||||
if (root < min) root = min;
|
||||
|
||||
/* check for an over-subscribed or incomplete set of lengths */
|
||||
left = 1;
|
||||
for (len = 1; len <= MAXBITS; len++) {
|
||||
left <<= 1;
|
||||
left -= count[len];
|
||||
if (left < 0) return -1; /* over-subscribed */
|
||||
}
|
||||
if (left > 0 && (type == CODES || max != 1))
|
||||
return -1; /* incomplete set */
|
||||
|
||||
/* generate offsets into symbol table for each length for sorting */
|
||||
offs[1] = 0;
|
||||
for (len = 1; len < MAXBITS; len++)
|
||||
offs[len + 1] = offs[len] + count[len];
|
||||
|
||||
/* sort symbols by length, by symbol order within each length */
|
||||
for (sym = 0; sym < codes; sym++)
|
||||
if (lens[sym] != 0) work[offs[lens[sym]]++] = (unsigned short)sym;
|
||||
|
||||
/*
|
||||
Create and fill in decoding tables. In this loop, the table being
|
||||
filled is at next and has curr index bits. The code being used is huff
|
||||
with length len. That code is converted to an index by dropping drop
|
||||
bits off of the bottom. For codes where len is less than drop + curr,
|
||||
those top drop + curr - len bits are incremented through all values to
|
||||
fill the table with replicated entries.
|
||||
|
||||
root is the number of index bits for the root table. When len exceeds
|
||||
root, sub-tables are created pointed to by the root entry with an index
|
||||
of the low root bits of huff. This is saved in low to check for when a
|
||||
new sub-table should be started. drop is zero when the root table is
|
||||
being filled, and drop is root when sub-tables are being filled.
|
||||
|
||||
When a new sub-table is needed, it is necessary to look ahead in the
|
||||
code lengths to determine what size sub-table is needed. The length
|
||||
counts are used for this, and so count[] is decremented as codes are
|
||||
entered in the tables.
|
||||
|
||||
used keeps track of how many table entries have been allocated from the
|
||||
provided *table space. It is checked for LENS and DIST tables against
|
||||
the constants ENOUGH_LENS and ENOUGH_DISTS to guard against changes in
|
||||
the initial root table size constants. See the comments in inftrees.h
|
||||
for more information.
|
||||
|
||||
sym increments through all symbols, and the loop terminates when
|
||||
all codes of length max, i.e. all codes, have been processed. This
|
||||
routine permits incomplete codes, so another loop after this one fills
|
||||
in the rest of the decoding tables with invalid code markers.
|
||||
*/
|
||||
|
||||
/* set up for code type */
|
||||
switch (type) {
|
||||
case CODES:
|
||||
base = extra = work; /* dummy value--not used */
|
||||
end = 19;
|
||||
break;
|
||||
case LENS:
|
||||
base = lbase;
|
||||
base -= 257;
|
||||
extra = lext;
|
||||
extra -= 257;
|
||||
end = 256;
|
||||
break;
|
||||
default: /* DISTS */
|
||||
base = dbase;
|
||||
extra = dext;
|
||||
end = -1;
|
||||
}
|
||||
|
||||
/* initialize state for loop */
|
||||
huff = 0; /* starting code */
|
||||
sym = 0; /* starting code symbol */
|
||||
len = min; /* starting code length */
|
||||
next = *table; /* current table to fill in */
|
||||
curr = root; /* current table index bits */
|
||||
drop = 0; /* current bits to drop from code for index */
|
||||
low = (unsigned)(-1); /* trigger new sub-table when len > root */
|
||||
used = 1U << root; /* use root table entries */
|
||||
mask = used - 1; /* mask for comparing low */
|
||||
|
||||
/* check available table space */
|
||||
if ((type == LENS && used > ENOUGH_LENS) ||
|
||||
(type == DISTS && used > ENOUGH_DISTS))
|
||||
return 1;
|
||||
|
||||
/* process all codes and make table entries */
|
||||
for (;;) {
|
||||
/* create table entry */
|
||||
here.bits = (unsigned char)(len - drop);
|
||||
if ((int)(work[sym]) < end) {
|
||||
here.op = (unsigned char)0;
|
||||
here.val = work[sym];
|
||||
}
|
||||
else if ((int)(work[sym]) > end) {
|
||||
here.op = (unsigned char)(extra[work[sym]]);
|
||||
here.val = base[work[sym]];
|
||||
}
|
||||
else {
|
||||
here.op = (unsigned char)(32 + 64); /* end of block */
|
||||
here.val = 0;
|
||||
}
|
||||
|
||||
/* replicate for those indices with low len bits equal to huff */
|
||||
incr = 1U << (len - drop);
|
||||
fill = 1U << curr;
|
||||
min = fill; /* save offset to next table */
|
||||
do {
|
||||
fill -= incr;
|
||||
next[(huff >> drop) + fill] = here;
|
||||
} while (fill != 0);
|
||||
|
||||
/* backwards increment the len-bit code huff */
|
||||
incr = 1U << (len - 1);
|
||||
while (huff & incr)
|
||||
incr >>= 1;
|
||||
if (incr != 0) {
|
||||
huff &= incr - 1;
|
||||
huff += incr;
|
||||
}
|
||||
else
|
||||
huff = 0;
|
||||
|
||||
/* go to next symbol, update count, len */
|
||||
sym++;
|
||||
if (--(count[len]) == 0) {
|
||||
if (len == max) break;
|
||||
len = lens[work[sym]];
|
||||
}
|
||||
|
||||
/* create new sub-table if needed */
|
||||
if (len > root && (huff & mask) != low) {
|
||||
/* if first time, transition to sub-tables */
|
||||
if (drop == 0)
|
||||
drop = root;
|
||||
|
||||
/* increment past last table */
|
||||
next += min; /* here min is 1 << curr */
|
||||
|
||||
/* determine length of next table */
|
||||
curr = len - drop;
|
||||
left = (int)(1 << curr);
|
||||
while (curr + drop < max) {
|
||||
left -= count[curr + drop];
|
||||
if (left <= 0) break;
|
||||
curr++;
|
||||
left <<= 1;
|
||||
}
|
||||
|
||||
/* check for enough space */
|
||||
used += 1U << curr;
|
||||
if ((type == LENS && used > ENOUGH_LENS) ||
|
||||
(type == DISTS && used > ENOUGH_DISTS))
|
||||
return 1;
|
||||
|
||||
/* point entry in root table to sub-table */
|
||||
low = huff & mask;
|
||||
(*table)[low].op = (unsigned char)curr;
|
||||
(*table)[low].bits = (unsigned char)root;
|
||||
(*table)[low].val = (unsigned short)(next - *table);
|
||||
}
|
||||
}
|
||||
|
||||
/* fill in remaining table entry if code is incomplete (guaranteed to have
|
||||
at most one remaining entry, since if the code is incomplete, the
|
||||
maximum code length that was allowed to get this far is one bit) */
|
||||
if (huff != 0) {
|
||||
here.op = (unsigned char)64; /* invalid code marker */
|
||||
here.bits = (unsigned char)(len - drop);
|
||||
here.val = (unsigned short)0;
|
||||
next[huff] = here;
|
||||
}
|
||||
|
||||
/* set return parameters */
|
||||
*table += used;
|
||||
*bits = root;
|
||||
return 0;
|
||||
}
|
||||
1226
zlib-1.2.8/trees.c
Executable file
1226
zlib-1.2.8/trees.c
Executable file
File diff suppressed because it is too large
Load Diff
59
zlib-1.2.8/uncompr.c
Executable file
59
zlib-1.2.8/uncompr.c
Executable file
@ -0,0 +1,59 @@
|
||||
/* uncompr.c -- decompress a memory buffer
|
||||
* Copyright (C) 1995-2003, 2010 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/* @(#) $Id$ */
|
||||
|
||||
#define ZLIB_INTERNAL
|
||||
#include "zlib.h"
|
||||
|
||||
/* ===========================================================================
|
||||
Decompresses the source buffer into the destination buffer. sourceLen is
|
||||
the byte length of the source buffer. Upon entry, destLen is the total
|
||||
size of the destination buffer, which must be large enough to hold the
|
||||
entire uncompressed data. (The size of the uncompressed data must have
|
||||
been saved previously by the compressor and transmitted to the decompressor
|
||||
by some mechanism outside the scope of this compression library.)
|
||||
Upon exit, destLen is the actual size of the compressed buffer.
|
||||
|
||||
uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
|
||||
enough memory, Z_BUF_ERROR if there was not enough room in the output
|
||||
buffer, or Z_DATA_ERROR if the input data was corrupted.
|
||||
*/
|
||||
int ZEXPORT uncompress (dest, destLen, source, sourceLen)
|
||||
Bytef *dest;
|
||||
uLongf *destLen;
|
||||
const Bytef *source;
|
||||
uLong sourceLen;
|
||||
{
|
||||
z_stream stream;
|
||||
int err;
|
||||
|
||||
stream.next_in = (z_const Bytef *)source;
|
||||
stream.avail_in = (uInt)sourceLen;
|
||||
/* Check for source > 64K on 16-bit machine: */
|
||||
if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
|
||||
|
||||
stream.next_out = dest;
|
||||
stream.avail_out = (uInt)*destLen;
|
||||
if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
|
||||
|
||||
stream.zalloc = (alloc_func)0;
|
||||
stream.zfree = (free_func)0;
|
||||
|
||||
err = inflateInit(&stream);
|
||||
if (err != Z_OK) return err;
|
||||
|
||||
err = inflate(&stream, Z_FINISH);
|
||||
if (err != Z_STREAM_END) {
|
||||
inflateEnd(&stream);
|
||||
if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
|
||||
return Z_DATA_ERROR;
|
||||
return err;
|
||||
}
|
||||
*destLen = stream.total_out;
|
||||
|
||||
err = inflateEnd(&stream);
|
||||
return err;
|
||||
}
|
||||
324
zlib-1.2.8/zutil.c
Executable file
324
zlib-1.2.8/zutil.c
Executable file
@ -0,0 +1,324 @@
|
||||
/* zutil.c -- target dependent utility functions for the compression library
|
||||
* Copyright (C) 1995-2005, 2010, 2011, 2012 Jean-loup Gailly.
|
||||
* For conditions of distribution and use, see copyright notice in zlib.h
|
||||
*/
|
||||
|
||||
/* @(#) $Id$ */
|
||||
|
||||
#include "zutil.h"
|
||||
#ifndef Z_SOLO
|
||||
# include "gzguts.h"
|
||||
#endif
|
||||
|
||||
#ifndef NO_DUMMY_DECL
|
||||
struct internal_state {int dummy;}; /* for buggy compilers */
|
||||
#endif
|
||||
|
||||
z_const char * const z_errmsg[10] = {
|
||||
"need dictionary", /* Z_NEED_DICT 2 */
|
||||
"stream end", /* Z_STREAM_END 1 */
|
||||
"", /* Z_OK 0 */
|
||||
"file error", /* Z_ERRNO (-1) */
|
||||
"stream error", /* Z_STREAM_ERROR (-2) */
|
||||
"data error", /* Z_DATA_ERROR (-3) */
|
||||
"insufficient memory", /* Z_MEM_ERROR (-4) */
|
||||
"buffer error", /* Z_BUF_ERROR (-5) */
|
||||
"incompatible version",/* Z_VERSION_ERROR (-6) */
|
||||
""};
|
||||
|
||||
|
||||
const char * ZEXPORT zlibVersion()
|
||||
{
|
||||
return ZLIB_VERSION;
|
||||
}
|
||||
|
||||
uLong ZEXPORT zlibCompileFlags()
|
||||
{
|
||||
uLong flags;
|
||||
|
||||
flags = 0;
|
||||
switch ((int)(sizeof(uInt))) {
|
||||
case 2: break;
|
||||
case 4: flags += 1; break;
|
||||
case 8: flags += 2; break;
|
||||
default: flags += 3;
|
||||
}
|
||||
switch ((int)(sizeof(uLong))) {
|
||||
case 2: break;
|
||||
case 4: flags += 1 << 2; break;
|
||||
case 8: flags += 2 << 2; break;
|
||||
default: flags += 3 << 2;
|
||||
}
|
||||
switch ((int)(sizeof(voidpf))) {
|
||||
case 2: break;
|
||||
case 4: flags += 1 << 4; break;
|
||||
case 8: flags += 2 << 4; break;
|
||||
default: flags += 3 << 4;
|
||||
}
|
||||
switch ((int)(sizeof(z_off_t))) {
|
||||
case 2: break;
|
||||
case 4: flags += 1 << 6; break;
|
||||
case 8: flags += 2 << 6; break;
|
||||
default: flags += 3 << 6;
|
||||
}
|
||||
#ifdef DEBUG
|
||||
flags += 1 << 8;
|
||||
#endif
|
||||
#if defined(ASMV) || defined(ASMINF)
|
||||
flags += 1 << 9;
|
||||
#endif
|
||||
#ifdef ZLIB_WINAPI
|
||||
flags += 1 << 10;
|
||||
#endif
|
||||
#ifdef BUILDFIXED
|
||||
flags += 1 << 12;
|
||||
#endif
|
||||
#ifdef DYNAMIC_CRC_TABLE
|
||||
flags += 1 << 13;
|
||||
#endif
|
||||
#ifdef NO_GZCOMPRESS
|
||||
flags += 1L << 16;
|
||||
#endif
|
||||
#ifdef NO_GZIP
|
||||
flags += 1L << 17;
|
||||
#endif
|
||||
#ifdef PKZIP_BUG_WORKAROUND
|
||||
flags += 1L << 20;
|
||||
#endif
|
||||
#ifdef FASTEST
|
||||
flags += 1L << 21;
|
||||
#endif
|
||||
#if defined(STDC) || defined(Z_HAVE_STDARG_H)
|
||||
# ifdef NO_vsnprintf
|
||||
flags += 1L << 25;
|
||||
# ifdef HAS_vsprintf_void
|
||||
flags += 1L << 26;
|
||||
# endif
|
||||
# else
|
||||
# ifdef HAS_vsnprintf_void
|
||||
flags += 1L << 26;
|
||||
# endif
|
||||
# endif
|
||||
#else
|
||||
flags += 1L << 24;
|
||||
# ifdef NO_snprintf
|
||||
flags += 1L << 25;
|
||||
# ifdef HAS_sprintf_void
|
||||
flags += 1L << 26;
|
||||
# endif
|
||||
# else
|
||||
# ifdef HAS_snprintf_void
|
||||
flags += 1L << 26;
|
||||
# endif
|
||||
# endif
|
||||
#endif
|
||||
return flags;
|
||||
}
|
||||
|
||||
#ifdef DEBUG
|
||||
|
||||
# ifndef verbose
|
||||
# define verbose 0
|
||||
# endif
|
||||
int ZLIB_INTERNAL z_verbose = verbose;
|
||||
|
||||
void ZLIB_INTERNAL z_error (m)
|
||||
char *m;
|
||||
{
|
||||
fprintf(stderr, "%s\n", m);
|
||||
exit(1);
|
||||
}
|
||||
#endif
|
||||
|
||||
/* exported to allow conversion of error code to string for compress() and
|
||||
* uncompress()
|
||||
*/
|
||||
const char * ZEXPORT zError(err)
|
||||
int err;
|
||||
{
|
||||
return ERR_MSG(err);
|
||||
}
|
||||
|
||||
#if defined(_WIN32_WCE)
|
||||
/* The Microsoft C Run-Time Library for Windows CE doesn't have
|
||||
* errno. We define it as a global variable to simplify porting.
|
||||
* Its value is always 0 and should not be used.
|
||||
*/
|
||||
int errno = 0;
|
||||
#endif
|
||||
|
||||
#ifndef HAVE_MEMCPY
|
||||
|
||||
void ZLIB_INTERNAL zmemcpy(dest, source, len)
|
||||
Bytef* dest;
|
||||
const Bytef* source;
|
||||
uInt len;
|
||||
{
|
||||
if (len == 0) return;
|
||||
do {
|
||||
*dest++ = *source++; /* ??? to be unrolled */
|
||||
} while (--len != 0);
|
||||
}
|
||||
|
||||
int ZLIB_INTERNAL zmemcmp(s1, s2, len)
|
||||
const Bytef* s1;
|
||||
const Bytef* s2;
|
||||
uInt len;
|
||||
{
|
||||
uInt j;
|
||||
|
||||
for (j = 0; j < len; j++) {
|
||||
if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
void ZLIB_INTERNAL zmemzero(dest, len)
|
||||
Bytef* dest;
|
||||
uInt len;
|
||||
{
|
||||
if (len == 0) return;
|
||||
do {
|
||||
*dest++ = 0; /* ??? to be unrolled */
|
||||
} while (--len != 0);
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifndef Z_SOLO
|
||||
|
||||
#ifdef SYS16BIT
|
||||
|
||||
#ifdef __TURBOC__
|
||||
/* Turbo C in 16-bit mode */
|
||||
|
||||
# define MY_ZCALLOC
|
||||
|
||||
/* Turbo C malloc() does not allow dynamic allocation of 64K bytes
|
||||
* and farmalloc(64K) returns a pointer with an offset of 8, so we
|
||||
* must fix the pointer. Warning: the pointer must be put back to its
|
||||
* original form in order to free it, use zcfree().
|
||||
*/
|
||||
|
||||
#define MAX_PTR 10
|
||||
/* 10*64K = 640K */
|
||||
|
||||
local int next_ptr = 0;
|
||||
|
||||
typedef struct ptr_table_s {
|
||||
voidpf org_ptr;
|
||||
voidpf new_ptr;
|
||||
} ptr_table;
|
||||
|
||||
local ptr_table table[MAX_PTR];
|
||||
/* This table is used to remember the original form of pointers
|
||||
* to large buffers (64K). Such pointers are normalized with a zero offset.
|
||||
* Since MSDOS is not a preemptive multitasking OS, this table is not
|
||||
* protected from concurrent access. This hack doesn't work anyway on
|
||||
* a protected system like OS/2. Use Microsoft C instead.
|
||||
*/
|
||||
|
||||
voidpf ZLIB_INTERNAL zcalloc (voidpf opaque, unsigned items, unsigned size)
|
||||
{
|
||||
voidpf buf = opaque; /* just to make some compilers happy */
|
||||
ulg bsize = (ulg)items*size;
|
||||
|
||||
/* If we allocate less than 65520 bytes, we assume that farmalloc
|
||||
* will return a usable pointer which doesn't have to be normalized.
|
||||
*/
|
||||
if (bsize < 65520L) {
|
||||
buf = farmalloc(bsize);
|
||||
if (*(ush*)&buf != 0) return buf;
|
||||
} else {
|
||||
buf = farmalloc(bsize + 16L);
|
||||
}
|
||||
if (buf == NULL || next_ptr >= MAX_PTR) return NULL;
|
||||
table[next_ptr].org_ptr = buf;
|
||||
|
||||
/* Normalize the pointer to seg:0 */
|
||||
*((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4;
|
||||
*(ush*)&buf = 0;
|
||||
table[next_ptr++].new_ptr = buf;
|
||||
return buf;
|
||||
}
|
||||
|
||||
void ZLIB_INTERNAL zcfree (voidpf opaque, voidpf ptr)
|
||||
{
|
||||
int n;
|
||||
if (*(ush*)&ptr != 0) { /* object < 64K */
|
||||
farfree(ptr);
|
||||
return;
|
||||
}
|
||||
/* Find the original pointer */
|
||||
for (n = 0; n < next_ptr; n++) {
|
||||
if (ptr != table[n].new_ptr) continue;
|
||||
|
||||
farfree(table[n].org_ptr);
|
||||
while (++n < next_ptr) {
|
||||
table[n-1] = table[n];
|
||||
}
|
||||
next_ptr--;
|
||||
return;
|
||||
}
|
||||
ptr = opaque; /* just to make some compilers happy */
|
||||
Assert(0, "zcfree: ptr not found");
|
||||
}
|
||||
|
||||
#endif /* __TURBOC__ */
|
||||
|
||||
|
||||
#ifdef M_I86
|
||||
/* Microsoft C in 16-bit mode */
|
||||
|
||||
# define MY_ZCALLOC
|
||||
|
||||
#if (!defined(_MSC_VER) || (_MSC_VER <= 600))
|
||||
# define _halloc halloc
|
||||
# define _hfree hfree
|
||||
#endif
|
||||
|
||||
voidpf ZLIB_INTERNAL zcalloc (voidpf opaque, uInt items, uInt size)
|
||||
{
|
||||
if (opaque) opaque = 0; /* to make compiler happy */
|
||||
return _halloc((long)items, size);
|
||||
}
|
||||
|
||||
void ZLIB_INTERNAL zcfree (voidpf opaque, voidpf ptr)
|
||||
{
|
||||
if (opaque) opaque = 0; /* to make compiler happy */
|
||||
_hfree(ptr);
|
||||
}
|
||||
|
||||
#endif /* M_I86 */
|
||||
|
||||
#endif /* SYS16BIT */
|
||||
|
||||
|
||||
#ifndef MY_ZCALLOC /* Any system without a special alloc function */
|
||||
|
||||
#ifndef STDC
|
||||
extern voidp malloc OF((uInt size));
|
||||
extern voidp calloc OF((uInt items, uInt size));
|
||||
extern void free OF((voidpf ptr));
|
||||
#endif
|
||||
|
||||
voidpf ZLIB_INTERNAL zcalloc (opaque, items, size)
|
||||
voidpf opaque;
|
||||
unsigned items;
|
||||
unsigned size;
|
||||
{
|
||||
if (opaque) items += size - size; /* make compiler happy */
|
||||
return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
|
||||
(voidpf)calloc(items, size);
|
||||
}
|
||||
|
||||
void ZLIB_INTERNAL zcfree (opaque, ptr)
|
||||
voidpf opaque;
|
||||
voidpf ptr;
|
||||
{
|
||||
free(ptr);
|
||||
if (opaque) return; /* make compiler happy */
|
||||
}
|
||||
|
||||
#endif /* MY_ZCALLOC */
|
||||
|
||||
#endif /* !Z_SOLO */
|
||||
Loading…
Reference in New Issue
Block a user