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/* * This file is derived from various .h and .c files from the zlib-1.0.4 * distribution by Jean-loup Gailly and Mark Adler, with some additions * by Paul Mackerras to aid in implementing Deflate compression and * decompression for PPP packets. See zlib.h for conditions of * distribution and use. * * Changes that have been made include: * - added Z_PACKET_FLUSH (see zlib.h for details) * - added inflateIncomp and deflateOutputPending * - allow strm->next_out to be NULL, meaning discard the output * * $Id: zlib.c,v 1.12 2002/04/02 13:34:03 dfs Exp $ */ /* * ==FILEVERSION 971210== * * This marker is used by the Linux installation script to determine * whether an up-to-date version of this file is already installed. */ #define NO_DUMMY_DECL #define NO_ZCFUNCS #define MY_ZCALLOC #if defined(__FreeBSD__) && (defined(KERNEL) || defined(_KERNEL)) #define inflate inflate_ppp /* FreeBSD already has an inflate :-( */ #endif /* +++ zutil.h */ /* zutil.h -- internal interface and configuration of the compression library * Copyright (C) 1995-1996 Jean-loup Gailly. * For conditions of distribution and use, see copyright notice in zlib.h */ /* WARNING: this file should *not* be used by applications. It is part of the implementation of the compression library and is subject to change. Applications should only use zlib.h. */ /* From: zutil.h,v 1.16 1996/07/24 13:41:13 me Exp $ */ #ifndef _Z_UTIL_H #define _Z_UTIL_H #include "zlib.h" #if defined(KERNEL) || defined(_KERNEL) /* Assume this is a *BSD or SVR4 kernel */ #include <sys/types.h> #include <sys/time.h> #include <sys/systm.h> #undef u # define HAVE_MEMCPY # define memcpy(d, s, n) bcopy((s), (d), (n)) # define memset(d, v, n) bzero((d), (n)) # define memcmp bcmp #else #if defined(__KERNEL__) /* Assume this is a Linux kernel */ #include <linux/string.h> #define HAVE_MEMCPY #else /* not kernel */ #if defined(MSDOS)||defined(VMS)||defined(CRAY)||defined(WIN32)||defined(RISCOS) # include <stddef.h> # include <errno.h> #else extern int errno; #endif #ifdef STDC # include <string.h> # include <stdlib.h> #endif #endif /* __KERNEL__ */ #endif /* _KERNEL || KERNEL */ #ifndef local # define local static #endif /* compile with -Dlocal if your debugger can't find static symbols */ typedef unsigned char uch; typedef uch FAR uchf; typedef unsigned short ush; typedef ush FAR ushf; typedef unsigned long ulg; extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */ /* (size given to avoid silly warnings with Visual C++) */ #define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] #define ERR_RETURN(strm,err) \ return (strm->msg = (char*)ERR_MSG(err), (err)) /* To be used only when the state is known to be valid */ /* common constants */ #ifndef DEF_WBITS # define DEF_WBITS MAX_WBITS #endif /* default windowBits for decompression. MAX_WBITS is for compression only */ #if MAX_MEM_LEVEL >= 8 # define DEF_MEM_LEVEL 8 #else # define DEF_MEM_LEVEL MAX_MEM_LEVEL #endif /* default memLevel */ #define STORED_BLOCK 0 #define STATIC_TREES 1 #define DYN_TREES 2 /* The three kinds of block type */ #define MIN_MATCH 3 #define MAX_MATCH 258 /* The minimum and maximum match lengths */ #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ /* target dependencies */ #ifdef MSDOS # define OS_CODE 0x00 # ifdef __TURBOC__ # include <alloc.h> # else /* MSC or DJGPP */ # include <malloc.h> # endif #endif #ifdef OS2 # define OS_CODE 0x06 #endif #ifdef WIN32 /* Window 95 & Windows NT */ # define OS_CODE 0x0b #endif #if defined(VAXC) || defined(VMS) # define OS_CODE 0x02 # define FOPEN(name, mode) \ fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") #endif #ifdef AMIGA # define OS_CODE 0x01 #endif #if defined(ATARI) || defined(atarist) # define OS_CODE 0x05 #endif #ifdef MACOS # define OS_CODE 0x07 #endif #ifdef __50SERIES /* Prime/PRIMOS */ # define OS_CODE 0x0F #endif #ifdef TOPS20 # define OS_CODE 0x0a #endif #if defined(_BEOS_) || defined(RISCOS) # define fdopen(fd,mode) NULL /* No fdopen() */ #endif /* Common defaults */ #ifndef OS_CODE # define OS_CODE 0x03 /* assume Unix */ #endif #ifndef FOPEN # define FOPEN(name, mode) fopen((name), (mode)) #endif /* functions */ #ifdef HAVE_STRERROR extern char *strerror OF((int)); # define zstrerror(errnum) strerror(errnum) #else # define zstrerror(errnum) "" #endif #if defined(pyr) # define NO_MEMCPY #endif #if (defined(M_I86SM) || defined(M_I86MM)) && !defined(_MSC_VER) /* Use our own functions for small and medium model with MSC <= 5.0. * You may have to use the same strategy for Borland C (untested). */ # define NO_MEMCPY #endif #if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) # define HAVE_MEMCPY #endif #ifdef HAVE_MEMCPY # ifdef SMALL_MEDIUM /* MSDOS small or medium model */ # define zmemcpy _fmemcpy # define zmemcmp _fmemcmp # define zmemzero(dest, len) _fmemset(dest, 0, len) # else # define zmemcpy memcpy # define zmemcmp memcmp # define zmemzero(dest, len) memset(dest, 0, len) # endif #else extern void zmemcpy OF((Bytef* dest, Bytef* source, uInt len)); extern int zmemcmp OF((Bytef* s1, Bytef* s2, uInt len)); extern void zmemzero OF((Bytef* dest, uInt len)); #endif /* Diagnostic functions */ #ifdef DEBUG_ZLIB # include <stdio.h> # ifndef verbose # define verbose 0 # endif extern void z_error OF((char *m)); # define Assert(cond,msg) {if(!(cond)) z_error(msg);} # define Trace(x) fprintf x # define Tracev(x) {if (verbose) fprintf x ;} # define Tracevv(x) {if (verbose>1) fprintf x ;} # define Tracec(c,x) {if (verbose && (c)) fprintf x ;} # define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;} #else # define Assert(cond,msg) # define Trace(x) # define Tracev(x) # define Tracevv(x) # define Tracec(c,x) # define Tracecv(c,x) #endif typedef uLong (*check_func) OF((uLong check, const Bytef *buf, uInt len)); voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size)); void zcfree OF((voidpf opaque, voidpf ptr)); #define ZALLOC(strm, items, size) \ (*((strm)->zalloc))((strm)->opaque, (items), (size)) #define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) #define TRY_FREE(s, p) {if (p) ZFREE(s, p);} #endif /* _Z_UTIL_H */ /* --- zutil.h */ /* +++ deflate.h */ /* deflate.h -- internal compression state * Copyright (C) 1995-1996 Jean-loup Gailly * For conditions of distribution and use, see copyright notice in zlib.h */ /* WARNING: this file should *not* be used by applications. It is part of the implementation of the compression library and is subject to change. Applications should only use zlib.h. */ /* From: deflate.h,v 1.10 1996/07/02 12:41:00 me Exp $ */ #ifndef _DEFLATE_H #define _DEFLATE_H /* #include "zutil.h" */ /* =========================================================================== * Internal compression state. */ #define LENGTH_CODES 29 /* number of length codes, not counting the special END_BLOCK code */ #define LITERALS 256 /* number of literal bytes 0..255 */ #define L_CODES (LITERALS+1+LENGTH_CODES) /* number of Literal or Length codes, including the END_BLOCK code */ #define D_CODES 30 /* number of distance codes */ #define BL_CODES 19 /* number of codes used to transfer the bit lengths */ #define HEAP_SIZE (2*L_CODES+1) /* maximum heap size */ #define MAX_BITS 15 /* All codes must not exceed MAX_BITS bits */ #define INIT_STATE 42 #define BUSY_STATE 113 #define FINISH_STATE 666 /* Stream status */ /* Data structure describing a single value and its code string. */ typedef struct ct_data_s { union { ush freq; /* frequency count */ ush code; /* bit string */ } fc; union { ush dad; /* father node in Huffman tree */ ush len; /* length of bit string */