1/* $NetBSD: zutil.h,v 1.7 2022/10/15 23:21:34 christos Exp $ */ 2 3/* zutil.h -- internal interface and configuration of the compression library 4 * Copyright (C) 1995-2022 Jean-loup Gailly, Mark Adler 5 * For conditions of distribution and use, see copyright notice in zlib.h 6 */ 7 8/* WARNING: this file should *not* be used by applications. It is 9 part of the implementation of the compression library and is 10 subject to change. Applications should only use zlib.h. 11 */ 12 13/* @(#) Id */ 14 15#ifndef ZUTIL_H 16#define ZUTIL_H 17 18#ifdef HAVE_HIDDEN 19# define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) 20#else 21# define ZLIB_INTERNAL 22#endif 23 24#include "zlib.h" 25 26#if defined(STDC) && !defined(Z_SOLO) 27# if defined(_KERNEL) || defined(_STANDALONE) 28# include <lib/libkern/libkern.h> 29# else 30# if !(defined(_WIN32_WCE) && defined(_MSC_VER)) 31# include <stddef.h> 32# endif 33# include <string.h> 34# include <stdlib.h> 35# endif 36#endif 37 38#ifndef local 39# define local static 40#endif 41/* since "static" is used to mean two completely different things in C, we 42 define "local" for the non-static meaning of "static", for readability 43 (compile with -Dlocal if your debugger can't find static symbols) */ 44 45typedef unsigned char uch; 46typedef uch FAR uchf; 47typedef unsigned short ush; 48typedef ush FAR ushf; 49typedef unsigned long ulg; 50 51#if !defined(Z_U8) && !defined(Z_SOLO) && defined(STDC) 52# if defined(_KERNEL) || defined(_STANDALONE) 53# ifdef _LP64 54# define Z_U8 unsigned long 55# else 56# define Z_U8 unsigned long long 57# endif 58# else 59# include <limits.h> 60# if (ULONG_MAX == 0xffffffffffffffff) 61# define Z_U8 unsigned long 62# elif (ULLONG_MAX == 0xffffffffffffffff) 63# define Z_U8 unsigned long long 64# elif (UINT_MAX == 0xffffffffffffffff) 65# define Z_U8 unsigned 66# endif 67# endif 68#endif 69 70extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */ 71/* (size given to avoid silly warnings with Visual C++) */ 72 73#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)] 74 75#define ERR_RETURN(strm,err) \ 76 return (strm->msg = __UNCONST(ERR_MSG(err)), (err)) 77/* To be used only when the state is known to be valid */ 78 79 /* common constants */ 80 81#ifndef DEF_WBITS 82# define DEF_WBITS MAX_WBITS 83#endif 84/* default windowBits for decompression. MAX_WBITS is for compression only */ 85 86#if MAX_MEM_LEVEL >= 8 87# define DEF_MEM_LEVEL 8 88#else 89# define DEF_MEM_LEVEL MAX_MEM_LEVEL 90#endif 91/* default memLevel */ 92 93#define STORED_BLOCK 0 94#define STATIC_TREES 1 95#define DYN_TREES 2 96/* The three kinds of block type */ 97 98#define MIN_MATCH 3 99#define MAX_MATCH 258 100/* The minimum and maximum match lengths */ 101 102#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */ 103 104 /* target dependencies */ 105 106#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32)) 107# define OS_CODE 0x00 108# ifndef Z_SOLO 109# if defined(__TURBOC__) || defined(__BORLANDC__) 110# if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__)) 111 /* Allow compilation with ANSI keywords only enabled */ 112 void _Cdecl farfree( void *block ); 113 void *_Cdecl farmalloc( unsigned long nbytes ); 114# else 115# include <alloc.h> 116# endif 117# else /* MSC or DJGPP */ 118# include <malloc.h> 119# endif 120# endif 121#endif 122 123#ifdef AMIGA 124# define OS_CODE 1 125#endif 126 127#if defined(VAXC) || defined(VMS) 128# define OS_CODE 2 129# define F_OPEN(name, mode) \ 130 fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512") 131#endif 132 133#ifdef __370__ 134# if __TARGET_LIB__ < 0x20000000 135# define OS_CODE 4 136# elif __TARGET_LIB__ < 0x40000000 137# define OS_CODE 11 138# else 139# define OS_CODE 8 140# endif 141#endif 142 143#if defined(ATARI) || defined(atarist) 144# define OS_CODE 5 145#endif 146 147#ifdef OS2 148# define OS_CODE 6 149# if defined(M_I86) && !defined(Z_SOLO) 150# include <malloc.h> 151# endif 152#endif 153 154#if defined(MACOS) || defined(TARGET_OS_MAC) 155# define OS_CODE 7 156# ifndef Z_SOLO 157# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os 158# include <unix.h> /* for fdopen */ 159# else 160# ifndef fdopen 161# define fdopen(fd,mode) NULL /* No fdopen() */ 162# endif 163# endif 164# endif 165#endif 166 167#ifdef __acorn 168# define OS_CODE 13 169#endif 170 171#if defined(WIN32) && !defined(__CYGWIN__) 172# define OS_CODE 10 173#endif 174 175#ifdef _BEOS_ 176# define OS_CODE 16 177#endif 178 179#ifdef __TOS_OS400__ 180# define OS_CODE 18 181#endif 182 183#ifdef __APPLE__ 184# define OS_CODE 19 185#endif 186 187#if defined(_BEOS_) || defined(RISCOS) 188# define fdopen(fd,mode) NULL /* No fdopen() */ 189#endif 190 191#if (defined(_MSC_VER) && (_MSC_VER > 600)) && !defined __INTERIX 192# if defined(_WIN32_WCE) 193# define fdopen(fd,mode) NULL /* No fdopen() */ 194# else 195# define fdopen(fd,type) _fdopen(fd,type) 196# endif 197#endif 198 199#if defined(__BORLANDC__) && !defined(MSDOS) 200 #pragma warn -8004 201 #pragma warn -8008 202 #pragma warn -8066 203#endif 204 205/* provide prototypes for these when building zlib without LFS */ 206#if !defined(_WIN32) && \ 207 (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0) 208 ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t)); 209 ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t)); 210 ZEXTERN uLong ZEXPORT crc32_combine_gen64 OF((z_off_t)); 211#endif 212 213 /* common defaults */ 214 215#ifndef OS_CODE 216# define OS_CODE 3 /* assume Unix */ 217#endif 218 219#ifndef F_OPEN 220# define F_OPEN(name, mode) fopen((name), (mode)) 221#endif 222 223 /* functions */ 224 225#if defined(pyr) || defined(Z_SOLO) 226# define NO_MEMCPY 227#endif 228#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__) 229 /* Use our own functions for small and medium model with MSC <= 5.0. 230 * You may have to use the same strategy for Borland C (untested). 231 * The __SC__ check is for Symantec. 232 */ 233# define NO_MEMCPY 234#endif 235#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY) 236# define HAVE_MEMCPY 237#endif 238#ifdef HAVE_MEMCPY 239# ifdef SMALL_MEDIUM /* MSDOS small or medium model */ 240# define zmemcpy _fmemcpy 241# define zmemcmp _fmemcmp 242# define zmemzero(dest, len) _fmemset(dest, 0, len) 243# else 244# define zmemcpy memcpy 245# define zmemcmp memcmp 246# define zmemzero(dest, len) memset(dest, 0, len) 247# endif 248#else 249 void ZLIB_INTERNAL zmemcpy OF((Bytef* dest, const Bytef* source, uInt len)); 250 int ZLIB_INTERNAL zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len)); 251 void ZLIB_INTERNAL zmemzero OF((Bytef* dest, uInt len)); 252#endif 253 254/* Diagnostic functions */ 255#ifdef ZLIB_DEBUG 256# include <stdio.h> 257 extern int ZLIB_INTERNAL z_verbose; 258 extern void ZLIB_INTERNAL z_error OF((char *m)); 259# define Assert(cond,msg) {if(!(cond)) z_error(msg);} 260# define Trace(x) {if (z_verbose>=0) fprintf x ;} 261# define Tracev(x) {if (z_verbose>0) fprintf x ;} 262# define Tracevv(x) {if (z_verbose>1) fprintf x ;} 263# define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;} 264# define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;} 265#else 266# define Assert(cond,msg) 267# define Trace(x) 268# define Tracev(x) 269# define Tracevv(x) 270# define Tracec(c,x) 271# define Tracecv(c,x) 272#endif 273 274#ifndef Z_SOLO 275 voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items, 276 unsigned size)); 277 void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr)); 278#endif 279 280#define ZALLOC(strm, items, size) \ 281 (*((strm)->zalloc))((strm)->opaque, (items), (size)) 282#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr)) 283#define TRY_FREE(s, p) {if (p) ZFREE(s, p);} 284 285/* Reverse the bytes in a 32-bit value */ 286#define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \ 287 (((q) & 0xff00) << 8) + (((q) & 0xff) << 24)) 288 289#endif /* ZUTIL_H */ 290