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@@ -1,2218 +0,0 @@
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-/*
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- * This file is derived from various .h and .c files from the zlib-1.2.3
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- * distribution by Jean-loup Gailly and Mark Adler, with some additions
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- * by Paul Mackerras to aid in implementing Deflate compression and
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- * decompression for PPP packets. See zlib.h for conditions of
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- * distribution and use.
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- *
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- * Changes that have been made include:
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- * - changed functions not used outside this file to "local"
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- * - added minCompression parameter to deflateInit2
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- * - added Z_PACKET_FLUSH (see zlib.h for details)
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- * - added inflateIncomp
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- */
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-
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-/*+++++*/
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-/* zutil.h -- internal interface and configuration of the compression library
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- * Copyright (C) 1995-2005 Jean-loup Gailly.
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- * For conditions of distribution and use, see copyright notice in zlib.h
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- */
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-
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-/* WARNING: this file should *not* be used by applications. It is
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- part of the implementation of the compression library and is
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- subject to change. Applications should only use zlib.h.
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- */
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-
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-#define ZUTIL_H
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-#define ZLIB_INTERNAL
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-
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-#include <common.h>
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-#include <compiler.h>
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-#include <asm/unaligned.h>
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-#include <watchdog.h>
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-#include "u-boot/zlib.h"
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-#undef OFF /* avoid conflicts */
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-
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-/* To avoid a build time warning */
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-#ifdef STDC
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-#include <malloc.h>
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-#endif
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-
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-#ifndef local
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-#define local static
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-#endif
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-/* compile with -Dlocal if your debugger can't find static symbols */
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-
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-typedef unsigned char uch;
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-typedef uch FAR uchf;
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-typedef unsigned short ush;
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-typedef ush FAR ushf;
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-typedef unsigned long ulg;
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-
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-#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
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-#define ERR_RETURN(strm,err) return (strm->msg = (char*)ERR_MSG(err), (err))
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-/* To be used only when the state is known to be valid */
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-
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-#ifndef NULL
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-#define NULL ((void *) 0)
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-#endif
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-
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- /* common constants */
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-
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-#ifndef DEF_WBITS
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-#define DEF_WBITS MAX_WBITS
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-#endif
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-/* default windowBits for decompression. MAX_WBITS is for compression only */
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-
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-#if MAX_MEM_LEVEL >= 8
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-#define DEF_MEM_LEVEL 8
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-#else
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-#define DEF_MEM_LEVEL MAX_MEM_LEVEL
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-#endif
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-/* default memLevel */
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-
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-#define STORED_BLOCK 0
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-#define STATIC_TREES 1
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-#define DYN_TREES 2
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-/* The three kinds of block type */
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-
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-#define MIN_MATCH 3
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-#define MAX_MATCH 258
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-/* The minimum and maximum match lengths */
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-
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- /* functions */
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-
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-#include <linux/string.h>
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-#define zmemcpy memcpy
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-#define zmemcmp memcmp
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-#define zmemzero(dest, len) memset(dest, 0, len)
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-
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-/* Diagnostic functions */
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-#ifdef DEBUG
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- extern int z_verbose;
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- extern void z_error OF((char *m));
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-#define Assert(cond,msg) {if(!(cond)) z_error(msg);}
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-#define fprintf(fp,...) printf(__VA_ARGS__)
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-#define Trace(x) {if (z_verbose>=0) fprintf x ;}
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-#define Tracev(x) {if (z_verbose>0) fprintf x ;}
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-#define Tracevv(x) {if (z_verbose>1) fprintf x ;}
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-#define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
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-#define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
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-#else
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-#define Assert(cond,msg)
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-#define Trace(x)
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-#define Tracev(x)
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-#define Tracevv(x)
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-#define Tracec(c,x)
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-#define Tracecv(c,x)
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-#endif
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-
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-voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
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-void zcfree OF((voidpf opaque, voidpf ptr, unsigned size));
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-
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-#define ZALLOC(strm, items, size) \
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- (*((strm)->zalloc))((strm)->opaque, (items), (size))
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-#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr), 0)
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-
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-/*+++++*/
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-/* inftrees.h -- header to use inftrees.c
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- * Copyright (C) 1995-2005 Mark Adler
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- * For conditions of distribution and use, see copyright notice in zlib.h
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- */
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-
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-/* WARNING: this file should *not* be used by applications. It is
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- part of the implementation of the compression library and is
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- subject to change. Applications should only use zlib.h.
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- */
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-
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-/* Structure for decoding tables. Each entry provides either the
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- information needed to do the operation requested by the code that
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- indexed that table entry, or it provides a pointer to another
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- table that indexes more bits of the code. op indicates whether
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- the entry is a pointer to another table, a literal, a length or
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- distance, an end-of-block, or an invalid code. For a table
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- pointer, the low four bits of op is the number of index bits of
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- that table. For a length or distance, the low four bits of op
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- is the number of extra bits to get after the code. bits is
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- the number of bits in this code or part of the code to drop off
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- of the bit buffer. val is the actual byte to output in the case
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- of a literal, the base length or distance, or the offset from
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- the current table to the next table. Each entry is four bytes. */
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-
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-typedef struct {
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- unsigned char op; /* operation, extra bits, table bits */
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- unsigned char bits; /* bits in this part of the code */
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- unsigned short val; /* offset in table or code value */
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-} code;
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-
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-/* Maximum size of dynamic tree. The maximum found in a long but non-
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- exhaustive search was 1444 code structures (852 for length/literals
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- and 592 for distances, the latter actually the result of an
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- exhaustive search). The true maximum is not known, but the value
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- below is more than safe. */
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-#define ENOUGH 2048
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-#define MAXD 592
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-
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-/* Type of code to build for inftable() */
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-typedef enum {
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- CODES,
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- LENS,
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- DISTS
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-} codetype;
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-
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-extern int inflate_table OF((codetype type, unsigned short FAR *lens,
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- unsigned codes, code FAR * FAR *table,
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- unsigned FAR *bits, unsigned short FAR *work));
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-/*+++++*/
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-/* inflate.h -- internal inflate state definition
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- * Copyright (C) 1995-2004 Mark Adler
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- * For conditions of distribution and use, see copyright notice in zlib.h
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- */
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-
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-/* WARNING: this file should *not* be used by applications. It is
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- part of the implementation of the compression library and is
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- subject to change. Applications should only use zlib.h.
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- */
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-
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-#define GUNZIP
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-
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-/* Possible inflate modes between inflate() calls */
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-typedef enum {
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- HEAD, /* i: waiting for magic header */
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- FLAGS, /* i: waiting for method and flags (gzip) */
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- TIME, /* i: waiting for modification time (gzip) */
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- OS, /* i: waiting for extra flags and operating system (gzip) */
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- EXLEN, /* i: waiting for extra length (gzip) */
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- EXTRA, /* i: waiting for extra bytes (gzip) */
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- NAME, /* i: waiting for end of file name (gzip) */
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- COMMENT, /* i: waiting for end of comment (gzip) */
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- HCRC, /* i: waiting for header crc (gzip) */
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- DICTID, /* i: waiting for dictionary check value */
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- DICT, /* waiting for inflateSetDictionary() call */
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- TYPE, /* i: waiting for type bits, including last-flag bit */
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- TYPEDO, /* i: same, but skip check to exit inflate on new block */
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- STORED, /* i: waiting for stored size (length and complement) */
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- COPY, /* i/o: waiting for input or output to copy stored block */
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- TABLE, /* i: waiting for dynamic block table lengths */
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- LENLENS, /* i: waiting for code length code lengths */
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- CODELENS, /* i: waiting for length/lit and distance code lengths */
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- LEN, /* i: waiting for length/lit code */
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- LENEXT, /* i: waiting for length extra bits */
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- DIST, /* i: waiting for distance code */
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- DISTEXT, /* i: waiting for distance extra bits */
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- MATCH, /* o: waiting for output space to copy string */
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- LIT, /* o: waiting for output space to write literal */
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- CHECK, /* i: waiting for 32-bit check value */
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- LENGTH, /* i: waiting for 32-bit length (gzip) */
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- DONE, /* finished check, done -- remain here until reset */
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- BAD, /* got a data error -- remain here until reset */
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- MEM, /* got an inflate() memory error -- remain here until reset */
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- SYNC, /* looking for synchronization bytes to restart inflate() */
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- START,
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- WASH,
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- END,
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- BADCODE
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-} inflate_mode;
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-
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-/*
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- State transitions between above modes -
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-
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- (most modes can go to the BAD or MEM mode -- not shown for clarity)
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-
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- Process header:
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- HEAD -> (gzip) or (zlib)
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- (gzip) -> FLAGS -> TIME -> OS -> EXLEN -> EXTRA -> NAME
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- NAME -> COMMENT -> HCRC -> TYPE
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- (zlib) -> DICTID or TYPE
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- DICTID -> DICT -> TYPE
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- Read deflate blocks:
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- TYPE -> STORED or TABLE or LEN or CHECK
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- STORED -> COPY -> TYPE
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- TABLE -> LENLENS -> CODELENS -> LEN
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- Read deflate codes:
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- LEN -> LENEXT or LIT or TYPE
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- LENEXT -> DIST -> DISTEXT -> MATCH -> LEN
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- LIT -> LEN
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- Process trailer:
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- CHECK -> LENGTH -> DONE
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- */
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-
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-/* state maintained between inflate() calls. Approximately 7K bytes. */
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-struct inflate_state {
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- inflate_mode mode; /* current inflate mode */
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- int last; /* true if processing last block */
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- int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
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- int havedict; /* true if dictionary provided */
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- int flags; /* gzip header method and flags (0 if zlib) */
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- unsigned dmax; /* zlib header max distance (INFLATE_STRICT) */
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- unsigned long check; /* protected copy of check value */
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- unsigned long total; /* protected copy of output count */
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- gz_headerp head; /* where to save gzip header information */
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- /* sliding window */
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- unsigned wbits; /* log base 2 of requested window size */
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- unsigned wsize; /* window size or zero if not using window */
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- unsigned whave; /* valid bytes in the window */
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- unsigned write; /* window write index */
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- unsigned char FAR *window; /* allocated sliding window, if needed */
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- /* bit accumulator */
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- unsigned long hold; /* input bit accumulator */
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- unsigned bits; /* number of bits in "in" */
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- /* for string and stored block copying */
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- unsigned length; /* literal or length of data to copy */
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- unsigned offset; /* distance back to copy string from */
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- /* for table and code decoding */
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- unsigned extra; /* extra bits needed */
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- /* fixed and dynamic code tables */
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- code const FAR *lencode; /* starting table for length/literal codes */
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- code const FAR *distcode; /* starting table for distance codes */
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- unsigned lenbits; /* index bits for lencode */
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- unsigned distbits; /* index bits for distcode */
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- /* dynamic table building */
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- unsigned ncode; /* number of code length code lengths */
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- unsigned nlen; /* number of length code lengths */
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- unsigned ndist; /* number of distance code lengths */
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- unsigned have; /* number of code lengths in lens[] */
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- code FAR *next; /* next available space in codes[] */
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- unsigned short lens[320]; /* temporary storage for code lengths */
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- unsigned short work[288]; /* work area for code table building */
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- code codes[ENOUGH]; /* space for code tables */
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-};
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-
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-/*+++++*/
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-/* inffast.h -- header to use inffast.c
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- * Copyright (C) 1995-2003 Mark Adler
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- * For conditions of distribution and use, see copyright notice in zlib.h
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- */
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-
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-/* WARNING: this file should *not* be used by applications. It is
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- part of the implementation of the compression library and is
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- subject to change. Applications should only use zlib.h.
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- */
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-
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-void inflate_fast OF((z_streamp strm, unsigned start));
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-/*+++++*/
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- /* inffixed.h -- table for decoding fixed codes
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- * Generated automatically by makefixed().
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- */
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-
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- /* WARNING: this file should *not* be used by applications. It
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- is part of the implementation of the compression library and
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- is subject to change. Applications should only use zlib.h.
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- */
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-
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- static const code lenfix[512] = {
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- {96,7,0},{0,8,80},{0,8,16},{20,8,115},{18,7,31},{0,8,112},{0,8,48},
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- {0,9,192},{16,7,10},{0,8,96},{0,8,32},{0,9,160},{0,8,0},{0,8,128},
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- {0,8,64},{0,9,224},{16,7,6},{0,8,88},{0,8,24},{0,9,144},{19,7,59},
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- {0,8,120},{0,8,56},{0,9,208},{17,7,17},{0,8,104},{0,8,40},{0,9,176},
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- {0,8,8},{0,8,136},{0,8,72},{0,9,240},{16,7,4},{0,8,84},{0,8,20},
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- {21,8,227},{19,7,43},{0,8,116},{0,8,52},{0,9,200},{17,7,13},{0,8,100},
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- {0,8,36},{0,9,168},{0,8,4},{0,8,132},{0,8,68},{0,9,232},{16,7,8},
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- {0,8,92},{0,8,28},{0,9,152},{20,7,83},{0,8,124},{0,8,60},{0,9,216},
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- {18,7,23},{0,8,108},{0,8,44},{0,9,184},{0,8,12},{0,8,140},{0,8,76},
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- {0,9,248},{16,7,3},{0,8,82},{0,8,18},{21,8,163},{19,7,35},{0,8,114},
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- {0,8,50},{0,9,196},{17,7,11},{0,8,98},{0,8,34},{0,9,164},{0,8,2},
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- {0,8,130},{0,8,66},{0,9,228},{16,7,7},{0,8,90},{0,8,26},{0,9,148},
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- {20,7,67},{0,8,122},{0,8,58},{0,9,212},{18,7,19},{0,8,106},{0,8,42},
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- {0,9,180},{0,8,10},{0,8,138},{0,8,74},{0,9,244},{16,7,5},{0,8,86},
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- {0,8,22},{64,8,0},{19,7,51},{0,8,118},{0,8,54},{0,9,204},{17,7,15},
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- {0,8,102},{0,8,38},{0,9,172},{0,8,6},{0,8,134},{0,8,70},{0,9,236},
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- {16,7,9},{0,8,94},{0,8,30},{0,9,156},{20,7,99},{0,8,126},{0,8,62},
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- {0,9,220},{18,7,27},{0,8,110},{0,8,46},{0,9,188},{0,8,14},{0,8,142},
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- {0,8,78},{0,9,252},{96,7,0},{0,8,81},{0,8,17},{21,8,131},{18,7,31},
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- {0,8,113},{0,8,49},{0,9,194},{16,7,10},{0,8,97},{0,8,33},{0,9,162},
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- {0,8,1},{0,8,129},{0,8,65},{0,9,226},{16,7,6},{0,8,89},{0,8,25},
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- {0,9,146},{19,7,59},{0,8,121},{0,8,57},{0,9,210},{17,7,17},{0,8,105},
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- {0,8,41},{0,9,178},{0,8,9},{0,8,137},{0,8,73},{0,9,242},{16,7,4},
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- {0,8,85},{0,8,21},{16,8,258},{19,7,43},{0,8,117},{0,8,53},{0,9,202},
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- {17,7,13},{0,8,101},{0,8,37},{0,9,170},{0,8,5},{0,8,133},{0,8,69},
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- {0,9,234},{16,7,8},{0,8,93},{0,8,29},{0,9,154},{20,7,83},{0,8,125},
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- {0,8,61},{0,9,218},{18,7,23},{0,8,109},{0,8,45},{0,9,186},{0,8,13},
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- {0,8,141},{0,8,77},{0,9,250},{16,7,3},{0,8,83},{0,8,19},{21,8,195},
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- {19,7,35},{0,8,115},{0,8,51},{0,9,198},{17,7,11},{0,8,99},{0,8,35},
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- {0,9,166},{0,8,3},{0,8,131},{0,8,67},{0,9,230},{16,7,7},{0,8,91},
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- {0,8,27},{0,9,150},{20,7,67},{0,8,123},{0,8,59},{0,9,214},{18,7,19},
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- {0,8,107},{0,8,43},{0,9,182},{0,8,11},{0,8,139},{0,8,75},{0,9,246},
|
|
|
- {16,7,5},{0,8,87},{0,8,23},{64,8,0},{19,7,51},{0,8,119},{0,8,55},
|
|
|
- {0,9,206},{17,7,15},{0,8,103},{0,8,39},{0,9,174},{0,8,7},{0,8,135},
|
|
|
- {0,8,71},{0,9,238},{16,7,9},{0,8,95},{0,8,31},{0,9,158},{20,7,99},
|
|
|
- {0,8,127},{0,8,63},{0,9,222},{18,7,27},{0,8,111},{0,8,47},{0,9,190},
|
|
|
- {0,8,15},{0,8,143},{0,8,79},{0,9,254},{96,7,0},{0,8,80},{0,8,16},
|
|
|
- {20,8,115},{18,7,31},{0,8,112},{0,8,48},{0,9,193},{16,7,10},{0,8,96},
|
|
|
- {0,8,32},{0,9,161},{0,8,0},{0,8,128},{0,8,64},{0,9,225},{16,7,6},
|
|
|
- {0,8,88},{0,8,24},{0,9,145},{19,7,59},{0,8,120},{0,8,56},{0,9,209},
|
|
|
- {17,7,17},{0,8,104},{0,8,40},{0,9,177},{0,8,8},{0,8,136},{0,8,72},
|
|
|
- {0,9,241},{16,7,4},{0,8,84},{0,8,20},{21,8,227},{19,7,43},{0,8,116},
|
|
|
- {0,8,52},{0,9,201},{17,7,13},{0,8,100},{0,8,36},{0,9,169},{0,8,4},
|
|
|
- {0,8,132},{0,8,68},{0,9,233},{16,7,8},{0,8,92},{0,8,28},{0,9,153},
|
|
|
- {20,7,83},{0,8,124},{0,8,60},{0,9,217},{18,7,23},{0,8,108},{0,8,44},
|
|
|
- {0,9,185},{0,8,12},{0,8,140},{0,8,76},{0,9,249},{16,7,3},{0,8,82},
|
|
|
- {0,8,18},{21,8,163},{19,7,35},{0,8,114},{0,8,50},{0,9,197},{17,7,11},
|
|
|
- {0,8,98},{0,8,34},{0,9,165},{0,8,2},{0,8,130},{0,8,66},{0,9,229},
|
|
|
- {16,7,7},{0,8,90},{0,8,26},{0,9,149},{20,7,67},{0,8,122},{0,8,58},
|
|
|
- {0,9,213},{18,7,19},{0,8,106},{0,8,42},{0,9,181},{0,8,10},{0,8,138},
|
|
|
- {0,8,74},{0,9,245},{16,7,5},{0,8,86},{0,8,22},{64,8,0},{19,7,51},
|
|
|
- {0,8,118},{0,8,54},{0,9,205},{17,7,15},{0,8,102},{0,8,38},{0,9,173},
|
|
|
- {0,8,6},{0,8,134},{0,8,70},{0,9,237},{16,7,9},{0,8,94},{0,8,30},
|
|
|
- {0,9,157},{20,7,99},{0,8,126},{0,8,62},{0,9,221},{18,7,27},{0,8,110},
|
|
|
- {0,8,46},{0,9,189},{0,8,14},{0,8,142},{0,8,78},{0,9,253},{96,7,0},
|
|
|
- {0,8,81},{0,8,17},{21,8,131},{18,7,31},{0,8,113},{0,8,49},{0,9,195},
|
|
|
- {16,7,10},{0,8,97},{0,8,33},{0,9,163},{0,8,1},{0,8,129},{0,8,65},
|
|
|
- {0,9,227},{16,7,6},{0,8,89},{0,8,25},{0,9,147},{19,7,59},{0,8,121},
|
|
|
- {0,8,57},{0,9,211},{17,7,17},{0,8,105},{0,8,41},{0,9,179},{0,8,9},
|
|
|
- {0,8,137},{0,8,73},{0,9,243},{16,7,4},{0,8,85},{0,8,21},{16,8,258},
|
|
|
- {19,7,43},{0,8,117},{0,8,53},{0,9,203},{17,7,13},{0,8,101},{0,8,37},
|
|
|
- {0,9,171},{0,8,5},{0,8,133},{0,8,69},{0,9,235},{16,7,8},{0,8,93},
|
|
|
- {0,8,29},{0,9,155},{20,7,83},{0,8,125},{0,8,61},{0,9,219},{18,7,23},
|
|
|
- {0,8,109},{0,8,45},{0,9,187},{0,8,13},{0,8,141},{0,8,77},{0,9,251},
|
|
|
- {16,7,3},{0,8,83},{0,8,19},{21,8,195},{19,7,35},{0,8,115},{0,8,51},
|
|
|
- {0,9,199},{17,7,11},{0,8,99},{0,8,35},{0,9,167},{0,8,3},{0,8,131},
|
|
|
- {0,8,67},{0,9,231},{16,7,7},{0,8,91},{0,8,27},{0,9,151},{20,7,67},
|
|
|
- {0,8,123},{0,8,59},{0,9,215},{18,7,19},{0,8,107},{0,8,43},{0,9,183},
|
|
|
- {0,8,11},{0,8,139},{0,8,75},{0,9,247},{16,7,5},{0,8,87},{0,8,23},
|
|
|
- {64,8,0},{19,7,51},{0,8,119},{0,8,55},{0,9,207},{17,7,15},{0,8,103},
|
|
|
- {0,8,39},{0,9,175},{0,8,7},{0,8,135},{0,8,71},{0,9,239},{16,7,9},
|
|
|
- {0,8,95},{0,8,31},{0,9,159},{20,7,99},{0,8,127},{0,8,63},{0,9,223},
|
|
|
- {18,7,27},{0,8,111},{0,8,47},{0,9,191},{0,8,15},{0,8,143},{0,8,79},
|
|
|
- {0,9,255}
|
|
|
- };
|
|
|
-
|
|
|
- static const code distfix[32] = {
|
|
|
- {16,5,1},{23,5,257},{19,5,17},{27,5,4097},{17,5,5},{25,5,1025},
|
|
|
- {21,5,65},{29,5,16385},{16,5,3},{24,5,513},{20,5,33},{28,5,8193},
|
|
|
- {18,5,9},{26,5,2049},{22,5,129},{64,5,0},{16,5,2},{23,5,385},
|
|
|
- {19,5,25},{27,5,6145},{17,5,7},{25,5,1537},{21,5,97},{29,5,24577},
|
|
|
- {16,5,4},{24,5,769},{20,5,49},{28,5,12289},{18,5,13},{26,5,3073},
|
|
|
- {22,5,193},{64,5,0}
|
|
|
- };
|
|
|
-
|
|
|
-/*+++++*/
|
|
|
-/* inffast.c -- fast decoding
|
|
|
- * Copyright (C) 1995-2004 Mark Adler
|
|
|
- * For conditions of distribution and use, see copyright notice in zlib.h
|
|
|
- */
|
|
|
-
|
|
|
-/* 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)
|
|
|
- */
|
|
|
-#define OFF 1
|
|
|
-#define PUP(a) *++(a)
|
|
|
-#define UP_UNALIGNED(a) get_unaligned(++(a))
|
|
|
-
|
|
|
-/*
|
|
|
- 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 inflate_fast(strm, start)
|
|
|
-z_streamp strm;
|
|
|
-unsigned start; /* inflate()'s starting value for strm->avail_out */
|
|
|
-{
|
|
|
- struct inflate_state FAR *state;
|
|
|
- unsigned char FAR *in; /* local strm->next_in */
|
|
|
- unsigned char FAR *last; /* while in < last, enough input available */
|
|
|
- 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 write; /* 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 this; /* 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;
|
|
|
- write = state->write;
|
|
|
- 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;
|
|
|
- }
|
|
|
- this = lcode[hold & lmask];
|
|
|
- dolen:
|
|
|
- op = (unsigned)(this.bits);
|
|
|
- hold >>= op;
|
|
|
- bits -= op;
|
|
|
- op = (unsigned)(this.op);
|
|
|
- if (op == 0) { /* literal */
|
|
|
- Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
|
|
|
- "inflate: literal '%c'\n" :
|
|
|
- "inflate: literal 0x%02x\n", this.val));
|
|
|
- PUP(out) = (unsigned char)(this.val);
|
|
|
- }
|
|
|
- else if (op & 16) { /* length base */
|
|
|
- len = (unsigned)(this.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;
|
|
|
- }
|
|
|
- this = dcode[hold & dmask];
|
|
|
- dodist:
|
|
|
- op = (unsigned)(this.bits);
|
|
|
- hold >>= op;
|
|
|
- bits -= op;
|
|
|
- op = (unsigned)(this.op);
|
|
|
- if (op & 16) { /* distance base */
|
|
|
- dist = (unsigned)(this.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) {
|
|
|
- strm->msg = (char *)"invalid distance too far back";
|
|
|
- state->mode = BAD;
|
|
|
- break;
|
|
|
- }
|
|
|
- from = window - OFF;
|
|
|
- if (write == 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 (write < op) { /* wrap around window */
|
|
|
- from += wsize + write - op;
|
|
|
- op -= write;
|
|
|
- if (op < len) { /* some from end of window */
|
|
|
- len -= op;
|
|
|
- do {
|
|
|
- PUP(out) = PUP(from);
|
|
|
- } while (--op);
|
|
|
- from = window - OFF;
|
|
|
- if (write < len) { /* some from start of window */
|
|
|
- op = write;
|
|
|
- len -= op;
|
|
|
- do {
|
|
|
- PUP(out) = PUP(from);
|
|
|
- } while (--op);
|
|
|
- from = out - dist; /* rest from output */
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
- else { /* contiguous in window */
|
|
|
- from += write - 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 {
|
|
|
- unsigned short *sout;
|
|
|
- unsigned long loops;
|
|
|
-
|
|
|
- from = out - dist; /* copy direct from output */
|
|
|
- /* minimum length is three */
|
|
|
- /* Align out addr */
|
|
|
- if (!((long)(out - 1 + OFF) & 1)) {
|
|
|
- PUP(out) = PUP(from);
|
|
|
- len--;
|
|
|
- }
|
|
|
- sout = (unsigned short *)(out - OFF);
|
|
|
- if (dist > 2 ) {
|
|
|
- unsigned short *sfrom;
|
|
|
-
|
|
|
- sfrom = (unsigned short *)(from - OFF);
|
|
|
- loops = len >> 1;
|
|
|
- do
|
|
|
- PUP(sout) = UP_UNALIGNED(sfrom);
|
|
|
- while (--loops);
|
|
|
- out = (unsigned char *)sout + OFF;
|
|
|
- from = (unsigned char *)sfrom + OFF;
|
|
|
- } else { /* dist == 1 or dist == 2 */
|
|
|
- unsigned short pat16;
|
|
|
-
|
|
|
- pat16 = *(sout-2+2*OFF);
|
|
|
- if (dist == 1)
|
|
|
-#if defined(__BIG_ENDIAN)
|
|
|
- pat16 = (pat16 & 0xff) | ((pat16 & 0xff ) << 8);
|
|
|
-#elif defined(__LITTLE_ENDIAN)
|
|
|
- pat16 = (pat16 & 0xff00) | ((pat16 & 0xff00 ) >> 8);
|
|
|
-#else
|
|
|
-#error __BIG_ENDIAN nor __LITTLE_ENDIAN is defined
|
|
|
-#endif
|
|
|
- loops = len >> 1;
|
|
|
- do
|
|
|
- PUP(sout) = pat16;
|
|
|
- while (--loops);
|
|
|
- out = (unsigned char *)sout + OFF;
|
|
|
- }
|
|
|
- if (len & 1)
|
|
|
- PUP(out) = PUP(from);
|
|
|
- }
|
|
|
- }
|
|
|
- else if ((op & 64) == 0) { /* 2nd level distance code */
|
|
|
- this = dcode[this.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 */
|
|
|
- this = lcode[this.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 write == 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
|
|
|
- */
|
|
|
-
|
|
|
-/*+++++*/
|
|
|
-/* inftrees.c -- generate Huffman trees for efficient decoding
|
|
|
- * Copyright (C) 1995-2005 Mark Adler
|
|
|
- * For conditions of distribution and use, see copyright notice in zlib.h
|
|
|
- */
|
|
|
-
|
|
|
-#define MAXBITS 15
|
|
|
-/*
|
|
|
- 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 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 this; /* 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, 201, 196};
|
|
|
- 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 */
|
|
|
- this.op = (unsigned char)64; /* invalid code marker */
|
|
|
- this.bits = (unsigned char)1;
|
|
|
- this.val = (unsigned short)0;
|
|
|
- *(*table)++ = this; /* make a table to force an error */
|
|
|
- *(*table)++ = this;
|
|
|
- *bits = 1;
|
|
|
- return 0; /* no symbols, but wait for decoding to report error */
|
|
|
- }
|
|
|
- for (min = 1; min <= MAXBITS; 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 when a LENS table is being made
|
|
|
- against the space in *table, ENOUGH, minus the maximum space needed by
|
|
|
- the worst case distance code, MAXD. This should never happen, but the
|
|
|
- sufficiency of ENOUGH has not been proven exhaustively, hence the check.
|
|
|
- This assumes that when type == LENS, bits == 9.
|
|
|
-
|
|
|
- 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 - MAXD)
|
|
|
- return 1;
|
|
|
-
|
|
|
- /* process all codes and make table entries */
|
|
|
- for (;;) {
|
|
|
- /* create table entry */
|
|
|
- this.bits = (unsigned char)(len - drop);
|
|
|
- if ((int)(work[sym]) < end) {
|
|
|
- this.op = (unsigned char)0;
|
|
|
- this.val = work[sym];
|
|
|
- }
|
|
|
- else if ((int)(work[sym]) > end) {
|
|
|
- this.op = (unsigned char)(extra[work[sym]]);
|
|
|
- this.val = base[work[sym]];
|
|
|
- }
|
|
|
- else {
|
|
|
- this.op = (unsigned char)(32 + 64); /* end of block */
|
|
|
- this.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] = this;
|
|
|
- } 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 - MAXD)
|
|
|
- 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 rest of table for incomplete codes. This loop is similar to the
|
|
|
- loop above in incrementing huff for table indices. It is assumed that
|
|
|
- len is equal to curr + drop, so there is no loop needed to increment
|
|
|
- through high index bits. When the current sub-table is filled, the loop
|
|
|
- drops back to the root table to fill in any remaining entries there.
|
|
|
- */
|
|
|
- this.op = (unsigned char)64; /* invalid code marker */
|
|
|
- this.bits = (unsigned char)(len - drop);
|
|
|
- this.val = (unsigned short)0;
|
|
|
- while (huff != 0) {
|
|
|
- /* when done with sub-table, drop back to root table */
|
|
|
- if (drop != 0 && (huff & mask) != low) {
|
|
|
- drop = 0;
|
|
|
- len = root;
|
|
|
- next = *table;
|
|
|
- this.bits = (unsigned char)len;
|
|
|
- }
|
|
|
-
|
|
|
- /* put invalid code marker in table */
|
|
|
- next[huff >> drop] = this;
|
|
|
-
|
|
|
- /* 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;
|
|
|
- }
|
|
|
-
|
|
|
- /* set return parameters */
|
|
|
- *table += used;
|
|
|
- *bits = root;
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-/*+++++*/
|
|
|
-/* inflate.c -- zlib decompression
|
|
|
- * Copyright (C) 1995-2005 Mark Adler
|
|
|
- * For conditions of distribution and use, see copyright notice in zlib.h
|
|
|
- */
|
|
|
-local void fixedtables OF((struct inflate_state FAR *state));
|
|
|
-local int updatewindow OF((z_streamp strm, unsigned out));
|
|
|
-
|
|
|
-int ZEXPORT inflateReset(strm)
|
|
|
-z_streamp strm;
|
|
|
-{
|
|
|
- struct inflate_state FAR *state;
|
|
|
-
|
|
|
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
|
|
|
- state = (struct inflate_state FAR *)strm->state;
|
|
|
- strm->total_in = strm->total_out = state->total = 0;
|
|
|
- strm->msg = Z_NULL;
|
|
|
- strm->adler = 1; /* to support ill-conceived Java test suite */
|
|
|
- state->mode = HEAD;
|
|
|
- state->last = 0;
|
|
|
- state->havedict = 0;
|
|
|
- state->dmax = 32768U;
|
|
|
- state->head = Z_NULL;
|
|
|
- state->wsize = 0;
|
|
|
- state->whave = 0;
|
|
|
- state->write = 0;
|
|
|
- state->hold = 0;
|
|
|
- state->bits = 0;
|
|
|
- state->lencode = state->distcode = state->next = state->codes;
|
|
|
- WATCHDOG_RESET();
|
|
|
- Tracev((stderr, "inflate: reset\n"));
|
|
|
- return Z_OK;
|
|
|
-}
|
|
|
-
|
|
|
-int ZEXPORT inflateInit2_(strm, windowBits, version, stream_size)
|
|
|
-z_streamp strm;
|
|
|
-int windowBits;
|
|
|
-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) return Z_STREAM_ERROR;
|
|
|
- strm->msg = Z_NULL; /* in case we return an error */
|
|
|
- if (strm->zalloc == (alloc_func)0) {
|
|
|
- strm->zalloc = zcalloc;
|
|
|
- strm->opaque = (voidpf)0;
|
|
|
- }
|
|
|
- if (strm->zfree == (free_func)0) strm->zfree = zcfree;
|
|
|
- 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;
|
|
|
- if (windowBits < 0) {
|
|
|
- state->wrap = 0;
|
|
|
- windowBits = -windowBits;
|
|
|
- }
|
|
|
- else {
|
|
|
- state->wrap = (windowBits >> 4) + 1;
|
|
|
-#ifdef GUNZIP
|
|
|
- if (windowBits < 48) windowBits &= 15;
|
|
|
-#endif
|
|
|
- }
|
|
|
- if (windowBits < 8 || windowBits > 15) {
|
|
|
- ZFREE(strm, state);
|
|
|
- strm->state = Z_NULL;
|
|
|
- return Z_STREAM_ERROR;
|
|
|
- }
|
|
|
- state->wbits = (unsigned)windowBits;
|
|
|
- state->window = Z_NULL;
|
|
|
- return inflateReset(strm);
|
|
|
-}
|
|
|
-
|
|
|
-int ZEXPORT inflateInit_(strm, version, stream_size)
|
|
|
-z_streamp strm;
|
|
|
-const char *version;
|
|
|
-int stream_size;
|
|
|
-{
|
|
|
- return inflateInit2_(strm, DEF_WBITS, version, stream_size);
|
|
|
-}
|
|
|
-
|
|
|
-local void fixedtables(state)
|
|
|
-struct inflate_state FAR *state;
|
|
|
-{
|
|
|
- state->lencode = lenfix;
|
|
|
- state->lenbits = 9;
|
|
|
- state->distcode = distfix;
|
|
|
- state->distbits = 5;
|
|
|
-}
|
|
|
-
|
|
|
-/*
|
|
|
- Update the window with the last wsize (normally 32K) bytes written before
|
|
|
- returning. If window does not exist yet, create it. This is only called
|
|
|
- when a window is already in use, or when output has been written during this
|
|
|
- inflate call, but the end of the deflate stream has not been reached yet.
|
|
|
- It is also called to create a window for dictionary data when a dictionary
|
|
|
- is loaded.
|
|
|
-
|
|
|
- Providing output buffers larger than 32K to inflate() should provide a speed
|
|
|
- advantage, since only the last 32K of output is copied to the sliding window
|
|
|
- upon return from inflate(), and since all distances after the first 32K of
|
|
|
- output will fall in the output data, making match copies simpler and faster.
|
|
|
- The advantage may be dependent on the size of the processor's data caches.
|
|
|
- */
|
|
|
-local int updatewindow(strm, out)
|
|
|
-z_streamp strm;
|
|
|
-unsigned out;
|
|
|
-{
|
|
|
- struct inflate_state FAR *state;
|
|
|
- unsigned copy, dist;
|
|
|
-
|
|
|
- state = (struct inflate_state FAR *)strm->state;
|
|
|
-
|
|
|
- /* if it hasn't been done already, allocate space for the window */
|
|
|
- if (state->window == Z_NULL) {
|
|
|
- state->window = (unsigned char FAR *)
|
|
|
- ZALLOC(strm, 1U << state->wbits,
|
|
|
- sizeof(unsigned char));
|
|
|
- if (state->window == Z_NULL) return 1;
|
|
|
- }
|
|
|
-
|
|
|
- /* if window not in use yet, initialize */
|
|
|
- if (state->wsize == 0) {
|
|
|
- state->wsize = 1U << state->wbits;
|
|
|
- state->write = 0;
|
|
|
- state->whave = 0;
|
|
|
- }
|
|
|
-
|
|
|
- /* copy state->wsize or less output bytes into the circular window */
|
|
|
- copy = out - strm->avail_out;
|
|
|
- if (copy >= state->wsize) {
|
|
|
- zmemcpy(state->window, strm->next_out - state->wsize, state->wsize);
|
|
|
- state->write = 0;
|
|
|
- state->whave = state->wsize;
|
|
|
- }
|
|
|
- else {
|
|
|
- dist = state->wsize - state->write;
|
|
|
- if (dist > copy) dist = copy;
|
|
|
- zmemcpy(state->window + state->write, strm->next_out - copy, dist);
|
|
|
- copy -= dist;
|
|
|
- if (copy) {
|
|
|
- zmemcpy(state->window, strm->next_out - copy, copy);
|
|
|
- state->write = copy;
|
|
|
- state->whave = state->wsize;
|
|
|
- }
|
|
|
- else {
|
|
|
- state->write += dist;
|
|
|
- if (state->write == state->wsize) state->write = 0;
|
|
|
- if (state->whave < state->wsize) state->whave += dist;
|
|
|
- }
|
|
|
- }
|
|
|
- return 0;
|
|
|
-}
|
|
|
-
|
|
|
-/* Macros for inflate(): */
|
|
|
-
|
|
|
-/* check function to use adler32() for zlib or crc32() for gzip */
|
|
|
-#define UPDATE(check, buf, len) \
|
|
|
- (state->flags ? crc32(check, buf, len) : adler32(check, buf, len))
|
|
|
-
|
|
|
-/* check macros for header crc */
|
|
|
-#define CRC2(check, word) \
|
|
|
- do { \
|
|
|
- hbuf[0] = (unsigned char)(word); \
|
|
|
- hbuf[1] = (unsigned char)((word) >> 8); \
|
|
|
- check = crc32(check, hbuf, 2); \
|
|
|
- } while (0)
|
|
|
-
|
|
|
-#define CRC4(check, word) \
|
|
|
- do { \
|
|
|
- hbuf[0] = (unsigned char)(word); \
|
|
|
- hbuf[1] = (unsigned char)((word) >> 8); \
|
|
|
- hbuf[2] = (unsigned char)((word) >> 16); \
|
|
|
- hbuf[3] = (unsigned char)((word) >> 24); \
|
|
|
- check = crc32(check, hbuf, 4); \
|
|
|
- } while (0)
|
|
|
-
|
|
|
-/* Load registers with state in inflate() for speed */
|
|
|
-#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)
|
|
|
-
|
|
|
-/* Restore state from registers in inflate() */
|
|
|
-#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)
|
|
|
-
|
|
|
-/* Get a byte of input into the bit accumulator, or return from inflate()
|
|
|
- if there is no input available. */
|
|
|
-#define PULLBYTE() \
|
|
|
- do { \
|
|
|
- if (have == 0) goto inf_leave; \
|
|
|
- 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 inflate(). */
|
|
|
-#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)
|
|
|
-
|
|
|
-/* Reverse the bytes in a 32-bit value */
|
|
|
-#define REVERSE(q) \
|
|
|
- ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
|
|
|
- (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
|
|
|
-
|
|
|
-/*
|
|
|
- inflate() uses a state machine to process as much input data and generate as
|
|
|
- much output data as possible before returning. The state machine is
|
|
|
- structured roughly as follows:
|
|
|
-
|
|
|
- for (;;) switch (state) {
|
|
|
- ...
|
|
|
- case STATEn:
|
|
|
- if (not enough input data or output space to make progress)
|
|
|
- return;
|
|
|
- ... make progress ...
|
|
|
- state = STATEm;
|
|
|
- break;
|
|
|
- ...
|
|
|
- }
|
|
|
-
|
|
|
- so when inflate() is called again, the same case is attempted again, and
|
|
|
- if the appropriate resources are provided, the machine proceeds to the
|
|
|
- next state. The NEEDBITS() macro is usually the way the state evaluates
|
|
|
- whether it can proceed or should return. NEEDBITS() does the return if
|
|
|
- the requested bits are not available. The typical use of the BITS macros
|
|
|
- is:
|
|
|
-
|
|
|
- NEEDBITS(n);
|
|
|
- ... do something with BITS(n) ...
|
|
|
- DROPBITS(n);
|
|
|
-
|
|
|
- where NEEDBITS(n) either returns from inflate() if there isn't enough
|
|
|
- input left to load n bits into the accumulator, or it continues. BITS(n)
|
|
|
- gives the low n bits in the accumulator. When done, DROPBITS(n) drops
|
|
|
- the low n bits off the accumulator. INITBITS() clears the accumulator
|
|
|
- and sets the number of available bits to zero. BYTEBITS() discards just
|
|
|
- enough bits to put the accumulator on a byte boundary. After BYTEBITS()
|
|
|
- and a NEEDBITS(8), then BITS(8) would return the next byte in the stream.
|
|
|
-
|
|
|
- NEEDBITS(n) uses PULLBYTE() to get an available byte of input, or to return
|
|
|
- if there is no input available. The decoding of variable length codes uses
|
|
|
- PULLBYTE() directly in order to pull just enough bytes to decode the next
|
|
|
- code, and no more.
|
|
|
-
|
|
|
- Some states loop until they get enough input, making sure that enough
|
|
|
- state information is maintained to continue the loop where it left off
|
|
|
- if NEEDBITS() returns in the loop. For example, want, need, and keep
|
|
|
- would all have to actually be part of the saved state in case NEEDBITS()
|
|
|
- returns:
|
|
|
-
|
|
|
- case STATEw:
|
|
|
- while (want < need) {
|
|
|
- NEEDBITS(n);
|
|
|
- keep[want++] = BITS(n);
|
|
|
- DROPBITS(n);
|
|
|
- }
|
|
|
- state = STATEx;
|
|
|
- case STATEx:
|
|
|
-
|
|
|
- As shown above, if the next state is also the next case, then the break
|
|
|
- is omitted.
|
|
|
-
|
|
|
- A state may also return if there is not enough output space available to
|
|
|
- complete that state. Those states are copying stored data, writing a
|
|
|
- literal byte, and copying a matching string.
|
|
|
-
|
|
|
- When returning, a "goto inf_leave" is used to update the total counters,
|
|
|
- update the check value, and determine whether any progress has been made
|
|
|
- during that inflate() call in order to return the proper return code.
|
|
|
- Progress is defined as a change in either strm->avail_in or strm->avail_out.
|
|
|
- When there is a window, goto inf_leave will update the window with the last
|
|
|
- output written. If a goto inf_leave occurs in the middle of decompression
|
|
|
- and there is no window currently, goto inf_leave will create one and copy
|
|
|
- output to the window for the next call of inflate().
|
|
|
-
|
|
|
- In this implementation, the flush parameter of inflate() only affects the
|
|
|
- return code (per zlib.h). inflate() always writes as much as possible to
|
|
|
- strm->next_out, given the space available and the provided input--the effect
|
|
|
- documented in zlib.h of Z_SYNC_FLUSH. Furthermore, inflate() always defers
|
|
|
- the allocation of and copying into a sliding window until necessary, which
|
|
|
- provides the effect documented in zlib.h for Z_FINISH when the entire input
|
|
|
- stream available. So the only thing the flush parameter actually does is:
|
|
|
- when flush is set to Z_FINISH, inflate() cannot return Z_OK. Instead it
|
|
|
- will return Z_BUF_ERROR if it has not reached the end of the stream.
|
|
|
- */
|
|
|
-int ZEXPORT inflate(strm, flush)
|
|
|
-z_streamp strm;
|
|
|
-int flush;
|
|
|
-{
|
|
|
- struct inflate_state FAR *state;
|
|
|
- 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 in, out; /* save starting available input and output */
|
|
|
- unsigned copy; /* number of stored or match bytes to copy */
|
|
|
- unsigned char FAR *from; /* where to copy match bytes from */
|
|
|
- code this; /* current decoding table entry */
|
|
|
- code last; /* parent table entry */
|
|
|
- unsigned len; /* length to copy for repeats, bits to drop */
|
|
|
- int ret; /* return code */
|
|
|
-#ifdef GUNZIP
|
|
|
- unsigned char hbuf[4]; /* buffer for gzip header crc calculation */
|
|
|
-#endif
|
|
|
- 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};
|
|
|
-
|
|
|
- if (strm == Z_NULL || strm->state == Z_NULL ||
|
|
|
- (strm->next_in == Z_NULL && strm->avail_in != 0))
|
|
|
- return Z_STREAM_ERROR;
|
|
|
-
|
|
|
- state = (struct inflate_state FAR *)strm->state;
|
|
|
- if (state->mode == TYPE) state->mode = TYPEDO; /* skip check */
|
|
|
- LOAD();
|
|
|
- in = have;
|
|
|
- out = left;
|
|
|
- ret = Z_OK;
|
|
|
- for (;;)
|
|
|
- switch (state->mode) {
|
|
|
- case HEAD:
|
|
|
- if (state->wrap == 0) {
|
|
|
- state->mode = TYPEDO;
|
|
|
- break;
|
|
|
- }
|
|
|
- NEEDBITS(16);
|
|
|
-#ifdef GUNZIP
|
|
|
- if ((state->wrap & 2) && hold == 0x8b1f) { /* gzip header */
|
|
|
- state->check = crc32(0L, Z_NULL, 0);
|
|
|
- CRC2(state->check, hold);
|
|
|
- INITBITS();
|
|
|
- state->mode = FLAGS;
|
|
|
- break;
|
|
|
- }
|
|
|
- state->flags = 0; /* expect zlib header */
|
|
|
- if (state->head != Z_NULL)
|
|
|
- state->head->done = -1;
|
|
|
- if (!(state->wrap & 1) || /* check if zlib header allowed */
|
|
|
-#else
|
|
|
- if (
|
|
|
-#endif
|
|
|
- ((BITS(8) << 8) + (hold >> 8)) % 31) {
|
|
|
- strm->msg = (char *)"incorrect header check";
|
|
|
- state->mode = BAD;
|
|
|
- break;
|
|
|
- }
|
|
|
- if (BITS(4) != Z_DEFLATED) {
|
|
|
- strm->msg = (char *)"unknown compression method";
|
|
|
- state->mode = BAD;
|
|
|
- break;
|
|
|
- }
|
|
|
- DROPBITS(4);
|
|
|
- len = BITS(4) + 8;
|
|
|
- if (len > state->wbits) {
|
|
|
- strm->msg = (char *)"invalid window size";
|
|
|
- state->mode = BAD;
|
|
|
- break;
|
|
|
- }
|
|
|
- state->dmax = 1U << len;
|
|
|
- Tracev((stderr, "inflate: zlib header ok\n"));
|
|
|
- strm->adler = state->check = adler32(0L, Z_NULL, 0);
|
|
|
- state->mode = hold & 0x200 ? DICTID : TYPE;
|
|
|
- INITBITS();
|
|
|
- break;
|
|
|
-#ifdef GUNZIP
|
|
|
- case FLAGS:
|
|
|
- NEEDBITS(16);
|
|
|
- state->flags = (int)(hold);
|
|
|
- if ((state->flags & 0xff) != Z_DEFLATED) {
|
|
|
- strm->msg = (char *)"unknown compression method";
|
|
|
- state->mode = BAD;
|
|
|
- break;
|
|
|
- }
|
|
|
- if (state->flags & 0xe000) {
|
|
|
- strm->msg = (char *)"unknown header flags set";
|
|
|
- state->mode = BAD;
|
|
|
- break;
|
|
|
- }
|
|
|
- if (state->head != Z_NULL)
|
|
|
- state->head->text = (int)((hold >> 8) & 1);
|
|
|
- if (state->flags & 0x0200) CRC2(state->check, hold);
|
|
|
- INITBITS();
|
|
|
- state->mode = TIME;
|
|
|
- case TIME:
|
|
|
- NEEDBITS(32);
|
|
|
- if (state->head != Z_NULL)
|
|
|
- state->head->time = hold;
|
|
|
- if (state->flags & 0x0200) CRC4(state->check, hold);
|
|
|
- INITBITS();
|
|
|
- state->mode = OS;
|
|
|
- case OS:
|
|
|
- NEEDBITS(16);
|
|
|
- if (state->head != Z_NULL) {
|
|
|
- state->head->xflags = (int)(hold & 0xff);
|
|
|
- state->head->os = (int)(hold >> 8);
|
|
|
- }
|
|
|
- if (state->flags & 0x0200) CRC2(state->check, hold);
|
|
|
- INITBITS();
|
|
|
- state->mode = EXLEN;
|
|
|
- case EXLEN:
|
|
|
- if (state->flags & 0x0400) {
|
|
|
- NEEDBITS(16);
|
|
|
- state->length = (unsigned)(hold);
|
|
|
- if (state->head != Z_NULL)
|
|
|
- state->head->extra_len = (unsigned)hold;
|
|
|
- if (state->flags & 0x0200) CRC2(state->check, hold);
|
|
|
- INITBITS();
|
|
|
- }
|
|
|
- else if (state->head != Z_NULL)
|
|
|
- state->head->extra = Z_NULL;
|
|
|
- state->mode = EXTRA;
|
|
|
- case EXTRA:
|
|
|
- if (state->flags & 0x0400) {
|
|
|
- copy = state->length;
|
|
|
- if (copy > have) copy = have;
|
|
|
- if (copy) {
|
|
|
- if (state->head != Z_NULL &&
|
|
|
- state->head->extra != Z_NULL) {
|
|
|
- len = state->head->extra_len - state->length;
|
|
|
- zmemcpy(state->head->extra + len, next,
|
|
|
- len + copy > state->head->extra_max ?
|
|
|
- state->head->extra_max - len : copy);
|
|
|
- }
|
|
|
- if (state->flags & 0x0200)
|
|
|
- state->check = crc32(state->check, next, copy);
|
|
|
- have -= copy;
|
|
|
- next += copy;
|
|
|
- state->length -= copy;
|
|
|
- }
|
|
|
- if (state->length) goto inf_leave;
|
|
|
- }
|
|
|
- state->length = 0;
|
|
|
- state->mode = NAME;
|
|
|
- case NAME:
|
|
|
- if (state->flags & 0x0800) {
|
|
|
- if (have == 0) goto inf_leave;
|
|
|
- copy = 0;
|
|
|
- do {
|
|
|
- len = (unsigned)(next[copy++]);
|
|
|
- if (state->head != Z_NULL &&
|
|
|
- state->head->name != Z_NULL &&
|
|
|
- state->length < state->head->name_max)
|
|
|
- state->head->name[state->length++] = len;
|
|
|
- } while (len && copy < have);
|
|
|
- if (state->flags & 0x0200)
|
|
|
- state->check = crc32(state->check, next, copy);
|
|
|
- have -= copy;
|
|
|
- next += copy;
|
|
|
- if (len) goto inf_leave;
|
|
|
- }
|
|
|
- else if (state->head != Z_NULL)
|
|
|
- state->head->name = Z_NULL;
|
|
|
- state->length = 0;
|
|
|
- state->mode = COMMENT;
|
|
|
- case COMMENT:
|
|
|
- if (state->flags & 0x1000) {
|
|
|
- if (have == 0) goto inf_leave;
|
|
|
- copy = 0;
|
|
|
- do {
|
|
|
- len = (unsigned)(next[copy++]);
|
|
|
- if (state->head != Z_NULL &&
|
|
|
- state->head->comment != Z_NULL &&
|
|
|
- state->length < state->head->comm_max)
|
|
|
- state->head->comment[state->length++] = len;
|
|
|
- } while (len && copy < have);
|
|
|
- if (state->flags & 0x0200)
|
|
|
- state->check = crc32(state->check, next, copy);
|
|
|
- have -= copy;
|
|
|
- next += copy;
|
|
|
- if (len) goto inf_leave;
|
|
|
- }
|
|
|
- else if (state->head != Z_NULL)
|
|
|
- state->head->comment = Z_NULL;
|
|
|
- state->mode = HCRC;
|
|
|
- case HCRC:
|
|
|
- if (state->flags & 0x0200) {
|
|
|
- NEEDBITS(16);
|
|
|
- if (hold != (state->check & 0xffff)) {
|
|
|
- strm->msg = (char *)"header crc mismatch";
|
|
|
- state->mode = BAD;
|
|
|
- break;
|
|
|
- }
|
|
|
- INITBITS();
|
|
|
- }
|
|
|
- if (state->head != Z_NULL) {
|
|
|
- state->head->hcrc = (int)((state->flags >> 9) & 1);
|
|
|
- state->head->done = 1;
|
|
|
- }
|
|
|
- strm->adler = state->check = crc32(0L, Z_NULL, 0);
|
|
|
- state->mode = TYPE;
|
|
|
- break;
|
|
|
-#endif
|
|
|
- case DICTID:
|
|
|
- NEEDBITS(32);
|
|
|
- strm->adler = state->check = REVERSE(hold);
|
|
|
- INITBITS();
|
|
|
- state->mode = DICT;
|
|
|
- case DICT:
|
|
|
- if (state->havedict == 0) {
|
|
|
- RESTORE();
|
|
|
- return Z_NEED_DICT;
|
|
|
- }
|
|
|
- strm->adler = state->check = adler32(0L, Z_NULL, 0);
|
|
|
- state->mode = TYPE;
|
|
|
- case TYPE:
|
|
|
- WATCHDOG_RESET();
|
|
|
- if (flush == Z_BLOCK) goto inf_leave;
|
|
|
- case TYPEDO:
|
|
|
- if (state->last) {
|
|
|
- BYTEBITS();
|
|
|
- state->mode = CHECK;
|
|
|
- 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:
|
|
|
- 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();
|
|
|
- state->mode = COPY;
|
|
|
- case COPY:
|
|
|
- copy = state->length;
|
|
|
- if (copy) {
|
|
|
- if (copy > have) copy = have;
|
|
|
- if (copy > left) copy = left;
|
|
|
- if (copy == 0) goto inf_leave;
|
|
|
- zmemcpy(put, next, copy);
|
|
|
- have -= copy;
|
|
|
- next += copy;
|
|
|
- left -= copy;
|
|
|
- put += copy;
|
|
|
- state->length -= copy;
|
|
|
- break;
|
|
|
- }
|
|
|
- Tracev((stderr, "inflate: stored end\n"));
|
|
|
- state->mode = TYPE;
|
|
|
- break;
|
|
|
- case TABLE:
|
|
|
- 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"));
|
|
|
- state->have = 0;
|
|
|
- state->mode = LENLENS;
|
|
|
- case LENLENS:
|
|
|
- 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"));
|
|
|
- state->have = 0;
|
|
|
- state->mode = CODELENS;
|
|
|
- case CODELENS:
|
|
|
- while (state->have < state->nlen + state->ndist) {
|
|
|
- for (;;) {
|
|
|
- this = state->lencode[BITS(state->lenbits)];
|
|
|
- if ((unsigned)(this.bits) <= bits) break;
|
|
|
- PULLBYTE();
|
|
|
- }
|
|
|
- if (this.val < 16) {
|
|
|
- NEEDBITS(this.bits);
|
|
|
- DROPBITS(this.bits);
|
|
|
- state->lens[state->have++] = this.val;
|
|
|
- }
|
|
|
- else {
|
|
|
- if (this.val == 16) {
|
|
|
- NEEDBITS(this.bits + 2);
|
|
|
- DROPBITS(this.bits);
|
|
|
- if (state->have == 0) {
|
|
|
- strm->msg = (char *)"invalid bit length repeat";
|
|
|
- state->mode = BAD;
|
|
|
- break;
|
|
|
- }
|
|
|
- len = state->lens[state->have - 1];
|
|
|
- copy = 3 + BITS(2);
|
|
|
- DROPBITS(2);
|
|
|
- }
|
|
|
- else if (this.val == 17) {
|
|
|
- NEEDBITS(this.bits + 3);
|
|
|
- DROPBITS(this.bits);
|
|
|
- len = 0;
|
|
|
- copy = 3 + BITS(3);
|
|
|
- DROPBITS(3);
|
|
|
- }
|
|
|
- else {
|
|
|
- NEEDBITS(this.bits + 7);
|
|
|
- DROPBITS(this.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;
|
|
|
-
|
|
|
- /* build code tables */
|
|
|
- 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:
|
|
|
- WATCHDOG_RESET();
|
|
|
- if (have >= 6 && left >= 258) {
|
|
|
- RESTORE();
|
|
|
- inflate_fast(strm, out);
|
|
|
- LOAD();
|
|
|
- break;
|
|
|
- }
|
|
|
- for (;;) {
|
|
|
- this = state->lencode[BITS(state->lenbits)];
|
|
|
- if ((unsigned)(this.bits) <= bits) break;
|
|
|
- PULLBYTE();
|
|
|
- }
|
|
|
- if (this.op && (this.op & 0xf0) == 0) {
|
|
|
- last = this;
|
|
|
- for (;;) {
|
|
|
- this = state->lencode[last.val +
|
|
|
- (BITS(last.bits + last.op) >> last.bits)];
|
|
|
- if ((unsigned)(last.bits + this.bits) <= bits) break;
|
|
|
- PULLBYTE();
|
|
|
- }
|
|
|
- DROPBITS(last.bits);
|
|
|
- }
|
|
|
- DROPBITS(this.bits);
|
|
|
- state->length = (unsigned)this.val;
|
|
|
- if ((int)(this.op) == 0) {
|
|
|
- Tracevv((stderr, this.val >= 0x20 && this.val < 0x7f ?
|
|
|
- "inflate: literal '%c'\n" :
|
|
|
- "inflate: literal 0x%02x\n", this.val));
|
|
|
- state->mode = LIT;
|
|
|
- break;
|
|
|
- }
|
|
|
- if (this.op & 32) {
|
|
|
- Tracevv((stderr, "inflate: end of block\n"));
|
|
|
- state->mode = TYPE;
|
|
|
- break;
|
|
|
- }
|
|
|
- if (this.op & 64) {
|
|
|
- strm->msg = (char *)"invalid literal/length code";
|
|
|
- state->mode = BAD;
|
|
|
- break;
|
|
|
- }
|
|
|
- state->extra = (unsigned)(this.op) & 15;
|
|
|
- state->mode = LENEXT;
|
|
|
- case LENEXT:
|
|
|
- if (state->extra) {
|
|
|
- NEEDBITS(state->extra);
|
|
|
- state->length += BITS(state->extra);
|
|
|
- DROPBITS(state->extra);
|
|
|
- }
|
|
|
- Tracevv((stderr, "inflate: length %u\n", state->length));
|
|
|
- state->mode = DIST;
|
|
|
- case DIST:
|
|
|
- for (;;) {
|
|
|
- this = state->distcode[BITS(state->distbits)];
|
|
|
- if ((unsigned)(this.bits) <= bits) break;
|
|
|
- PULLBYTE();
|
|
|
- }
|
|
|
- if ((this.op & 0xf0) == 0) {
|
|
|
- last = this;
|
|
|
- for (;;) {
|
|
|
- this = state->distcode[last.val +
|
|
|
- (BITS(last.bits + last.op) >> last.bits)];
|
|
|
- if ((unsigned)(last.bits + this.bits) <= bits) break;
|
|
|
- PULLBYTE();
|
|
|
- }
|
|
|
- DROPBITS(last.bits);
|
|
|
- }
|
|
|
- DROPBITS(this.bits);
|
|
|
- if (this.op & 64) {
|
|
|
- strm->msg = (char *)"invalid distance code";
|
|
|
- state->mode = BAD;
|
|
|
- break;
|
|
|
- }
|
|
|
- state->offset = (unsigned)this.val;
|
|
|
- state->extra = (unsigned)(this.op) & 15;
|
|
|
- state->mode = DISTEXT;
|
|
|
- case DISTEXT:
|
|
|
- if (state->extra) {
|
|
|
- NEEDBITS(state->extra);
|
|
|
- state->offset += BITS(state->extra);
|
|
|
- DROPBITS(state->extra);
|
|
|
- }
|
|
|
-#ifdef INFLATE_STRICT
|
|
|
- if (state->offset > state->dmax) {
|
|
|
- strm->msg = (char *)"invalid distance too far back";
|
|
|
- state->mode = BAD;
|
|
|
- break;
|
|
|
- }
|
|
|
-#endif
|
|
|
- if (state->offset > state->whave + out - left) {
|
|
|
- strm->msg = (char *)"invalid distance too far back";
|
|
|
- state->mode = BAD;
|
|
|
- break;
|
|
|
- }
|
|
|
- Tracevv((stderr, "inflate: distance %u\n", state->offset));
|
|
|
- state->mode = MATCH;
|
|
|
- case MATCH:
|
|
|
- if (left == 0) goto inf_leave;
|
|
|
- copy = out - left;
|
|
|
- if (state->offset > copy) { /* copy from window */
|
|
|
- copy = state->offset - copy;
|
|
|
- if (copy > state->write) {
|
|
|
- copy -= state->write;
|
|
|
- from = state->window + (state->wsize - copy);
|
|
|
- }
|
|
|
- else
|
|
|
- from = state->window + (state->write - copy);
|
|
|
- if (copy > state->length) copy = state->length;
|
|
|
- }
|
|
|
- else { /* copy from output */
|
|
|
- from = put - state->offset;
|
|
|
- copy = state->length;
|
|
|
- }
|
|
|
- if (copy > left) copy = left;
|
|
|
- left -= copy;
|
|
|
- state->length -= copy;
|
|
|
- do {
|
|
|
- *put++ = *from++;
|
|
|
- } while (--copy);
|
|
|
- if (state->length == 0) state->mode = LEN;
|
|
|
- break;
|
|
|
- case LIT:
|
|
|
- if (left == 0) goto inf_leave;
|
|
|
- *put++ = (unsigned char)(state->length);
|
|
|
- left--;
|
|
|
- state->mode = LEN;
|
|
|
- break;
|
|
|
- case CHECK:
|
|
|
- if (state->wrap) {
|
|
|
- NEEDBITS(32);
|
|
|
- out -= left;
|
|
|
- strm->total_out += out;
|
|
|
- state->total += out;
|
|
|
- if (out)
|
|
|
- strm->adler = state->check =
|
|
|
- UPDATE(state->check, put - out, out);
|
|
|
- out = left;
|
|
|
- if ((
|
|
|
-#ifdef GUNZIP
|
|
|
- state->flags ? hold :
|
|
|
-#endif
|
|
|
- REVERSE(hold)) != state->check) {
|
|
|
- strm->msg = (char *)"incorrect data check";
|
|
|
- state->mode = BAD;
|
|
|
- break;
|
|
|
- }
|
|
|
- INITBITS();
|
|
|
- Tracev((stderr, "inflate: check matches trailer\n"));
|
|
|
- }
|
|
|
-#ifdef GUNZIP
|
|
|
- state->mode = LENGTH;
|
|
|
- case LENGTH:
|
|
|
- if (state->wrap && state->flags) {
|
|
|
- NEEDBITS(32);
|
|
|
- if (hold != (state->total & 0xffffffffUL)) {
|
|
|
- strm->msg = (char *)"incorrect length check";
|
|
|
- state->mode = BAD;
|
|
|
- break;
|
|
|
- }
|
|
|
- INITBITS();
|
|
|
- Tracev((stderr, "inflate: length matches trailer\n"));
|
|
|
- }
|
|
|
-#endif
|
|
|
- state->mode = DONE;
|
|
|
- case DONE:
|
|
|
- ret = Z_STREAM_END;
|
|
|
- goto inf_leave;
|
|
|
- case BAD:
|
|
|
- ret = Z_DATA_ERROR;
|
|
|
- goto inf_leave;
|
|
|
- case MEM:
|
|
|
- return Z_MEM_ERROR;
|
|
|
- case SYNC:
|
|
|
- default:
|
|
|
- return Z_STREAM_ERROR;
|
|
|
- }
|
|
|
-
|
|
|
- /*
|
|
|
- Return from inflate(), updating the total counts and the check value.
|
|
|
- If there was no progress during the inflate() call, return a buffer
|
|
|
- error. Call updatewindow() to create and/or update the window state.
|
|
|
- Note: a memory error from inflate() is non-recoverable.
|
|
|
- */
|
|
|
- inf_leave:
|
|
|
- RESTORE();
|
|
|
- if (state->wsize || (state->mode < CHECK && out != strm->avail_out))
|
|
|
- if (updatewindow(strm, out)) {
|
|
|
- state->mode = MEM;
|
|
|
- return Z_MEM_ERROR;
|
|
|
- }
|
|
|
- in -= strm->avail_in;
|
|
|
- out -= strm->avail_out;
|
|
|
- strm->total_in += in;
|
|
|
- strm->total_out += out;
|
|
|
- state->total += out;
|
|
|
- if (state->wrap && out)
|
|
|
- strm->adler = state->check =
|
|
|
- UPDATE(state->check, strm->next_out - out, out);
|
|
|
- strm->data_type = state->bits + (state->last ? 64 : 0) +
|
|
|
- (state->mode == TYPE ? 128 : 0);
|
|
|
- if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
|
|
|
- ret = Z_BUF_ERROR;
|
|
|
- return ret;
|
|
|
-}
|
|
|
-
|
|
|
-int ZEXPORT inflateEnd(strm)
|
|
|
-z_streamp strm;
|
|
|
-{
|
|
|
- struct inflate_state FAR *state;
|
|
|
- if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
|
|
|
- return Z_STREAM_ERROR;
|
|
|
- state = (struct inflate_state FAR *)strm->state;
|
|
|
- if (state->window != Z_NULL) {
|
|
|
- WATCHDOG_RESET();
|
|
|
- ZFREE(strm, state->window);
|
|
|
- }
|
|
|
- ZFREE(strm, strm->state);
|
|
|
- strm->state = Z_NULL;
|
|
|
- Tracev((stderr, "inflate: end\n"));
|
|
|
- return Z_OK;
|
|
|
-}
|
|
|
-
|
|
|
-/*+++++*/
|
|
|
-/* zutil.c -- target dependent utility functions for the compression library
|
|
|
- * Copyright (C) 1995-2005 Jean-loup Gailly.
|
|
|
- * For conditions of distribution and use, see copyright notice in zlib.h
|
|
|
- */
|
|
|
-
|
|
|
-/* @(#) $Id$ */
|
|
|
-
|
|
|
-#ifndef NO_DUMMY_DECL
|
|
|
-struct internal_state {int dummy;}; /* for buggy compilers */
|
|
|
-#endif
|
|
|
-
|
|
|
-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) */
|
|
|
-""};
|
|
|
-
|
|
|
-#ifdef DEBUG
|
|
|
-
|
|
|
-#ifndef verbose
|
|
|
-#define verbose 0
|
|
|
-#endif
|
|
|
-int z_verbose = verbose;
|
|
|
-
|
|
|
-void z_error (m)
|
|
|
- char *m;
|
|
|
-{
|
|
|
- fprintf(stderr, "%s\n", m);
|
|
|
- hang ();
|
|
|
-}
|
|
|
-#endif
|
|
|
-
|
|
|
-/* exported to allow conversion of error code to string for compress() and
|
|
|
- * uncompress()
|
|
|
- */
|
|
|
-#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 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 zcfree (opaque, ptr, nb)
|
|
|
- voidpf opaque;
|
|
|
- voidpf ptr;
|
|
|
- unsigned nb;
|
|
|
-{
|
|
|
- free(ptr);
|
|
|
- if (opaque)
|
|
|
- return; /* make compiler happy */
|
|
|
-}
|
|
|
-
|
|
|
-#endif /* MY_ZCALLOC */
|
|
|
-/*+++++*/
|
|
|
-/* adler32.c -- compute the Adler-32 checksum of a data stream
|
|
|
- * Copyright (C) 1995-2004 Mark Adler
|
|
|
- * For conditions of distribution and use, see copyright notice in zlib.h
|
|
|
- */
|
|
|
-
|
|
|
-/* @(#) $Id$ */
|
|
|
-
|
|
|
-#define BASE 65521UL /* 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 */
|
|
|
-#ifdef NO_DIVIDE
|
|
|
-#define MOD(a) \
|
|
|
- do { \
|
|
|
- if (a >= (BASE << 16)) \
|
|
|
- a -= (BASE << 16); \
|
|
|
- if (a >= (BASE << 15)) \
|
|
|
- a -= (BASE << 15); \
|
|
|
- if (a >= (BASE << 14)) \
|
|
|
- a -= (BASE << 14); \
|
|
|
- if (a >= (BASE << 13)) \
|
|
|
- a -= (BASE << 13); \
|
|
|
- if (a >= (BASE << 12)) \
|
|
|
- a -= (BASE << 12); \
|
|
|
- if (a >= (BASE << 11)) \
|
|
|
- a -= (BASE << 11); \
|
|
|
- if (a >= (BASE << 10)) \
|
|
|
- a -= (BASE << 10); \
|
|
|
- if (a >= (BASE << 9)) \
|
|
|
- a -= (BASE << 9); \
|
|
|
- if (a >= (BASE << 8)) \
|
|
|
- a -= (BASE << 8); \
|
|
|
- if (a >= (BASE << 7)) \
|
|
|
- a -= (BASE << 7); \
|
|
|
- if (a >= (BASE << 6)) \
|
|
|
- a -= (BASE << 6); \
|
|
|
- if (a >= (BASE << 5)) \
|
|
|
- a -= (BASE << 5); \
|
|
|
- if (a >= (BASE << 4)) \
|
|
|
- a -= (BASE << 4); \
|
|
|
- if (a >= (BASE << 3)) \
|
|
|
- a -= (BASE << 3); \
|
|
|
- if (a >= (BASE << 2)) \
|
|
|
- a -= (BASE << 2); \
|
|
|
- if (a >= (BASE << 1)) \
|
|
|
- a -= (BASE << 1); \
|
|
|
- if (a >= BASE) \
|
|
|
- a -= BASE; \
|
|
|
- } while (0)
|
|
|
-#define MOD4(a) \
|
|
|
- do { \
|
|
|
- if (a >= (BASE << 4)) \
|
|
|
- a -= (BASE << 4); \
|
|
|
- if (a >= (BASE << 3)) \
|
|
|
- a -= (BASE << 3); \
|
|
|
- if (a >= (BASE << 2)) \
|
|
|
- a -= (BASE << 2); \
|
|
|
- if (a >= (BASE << 1)) \
|
|
|
- a -= (BASE << 1); \
|
|
|
- if (a >= BASE) \
|
|
|
- a -= BASE; \
|
|
|
- } while (0)
|
|
|
-#else
|
|
|
-#define MOD(a) a %= BASE
|
|
|
-#define MOD4(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;
|
|
|
- MOD4(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);
|
|
|
-}
|
Mike Frysinger