/* zutil.h -- internal interface and configuration of the compression library

* Copyright (C) 1995-2024 Jean-loup Gailly, Mark Adler

* 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.

*/

/* @(#) $Id$ */

#ifndef ZUTIL_H

#define ZUTIL_H

#ifdef HAVE_HIDDEN

# define ZLIB_INTERNAL __attribute__((visibility ("hidden")))

#else

# define ZLIB_INTERNAL

#endif

#include "zlib.h"

#if defined(STDC) && !defined(Z_SOLO)

# if !(defined(_WIN32_WCE) && defined(_MSC_VER))

# include <stddef.h>

# endif

# include <string.h>

# include <stdlib.h>

#endif

#ifdef NO_ERRNO_H

# ifdef _WIN32_WCE

/* The Microsoft C Run-Time Library for Windows CE doesn't have

* errno. We define it as a global variable to simplify porting.

* Its value is always 0 and should not be used. We rename it to

* avoid conflict with other libraries that use the same workaround.

*/

# define errno z_errno

# endif

extern int errno;

#else

# ifndef _WIN32_WCE

# include <errno.h>

# endif

#endif

#ifndef local

# define local static

#endif

/* since "static" is used to mean two completely different things in C, we

define "local" for the non-static meaning of "static", for readability

(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;

#if !defined(Z_U8) && !defined(Z_SOLO) && defined(STDC)

# include <limits.h>

# if (ULONG_MAX == 0xffffffffffffffff)

# define Z_U8 unsigned long

# elif (ULLONG_MAX == 0xffffffffffffffff)

# define Z_U8 unsigned long long

# elif (UINT_MAX == 0xffffffffffffffff)

# define Z_U8 unsigned

# endif

#endif

extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */

/* (size given to avoid silly warnings with Visual C++) */

#define ERR_MSG(err) z_errmsg[(err) < -6 || (err) > 2 ? 9 : 2 - (err)]

#define ERR_RETURN(strm,err) \

return (strm->msg = 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 */

#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))

# define OS_CODE 0x00

# ifndef Z_SOLO

# if defined(__TURBOC__) || defined(__BORLANDC__)

# if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))

/* Allow compilation with ANSI keywords only enabled */

void _Cdecl farfree( void *block );

void *_Cdecl farmalloc( unsigned long nbytes );

# else

# include <alloc.h>

# endif

# else /* MSC or DJGPP */

# include <malloc.h>

# endif

# endif

#endif

#ifdef AMIGA

# define OS_CODE 1

#endif

#if defined(VAXC) || defined(VMS)

# define OS_CODE 2

# define F_OPEN(name, mode) \

fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")

#endif

#ifdef __370__

# if __TARGET_LIB__ < 0x20000000

# define OS_CODE 4

# elif __TARGET_LIB__ < 0x40000000

# define OS_CODE 11

# else

# define OS_CODE 8

# endif

#endif

#if defined(ATARI) || defined(atarist)

# define OS_CODE 5

#endif

#ifdef OS2

# define OS_CODE 6

# if defined(M_I86) && !defined(Z_SOLO)

# include <malloc.h>

# endif

#endif

#if defined(MACOS)

# define OS_CODE 7

#endif

#ifdef __acorn

# define OS_CODE 13

#endif

#if defined(WIN32) && !defined(__CYGWIN__)

# define OS_CODE 10

#endif

#ifdef _BEOS_

# define OS_CODE 16

#endif

#ifdef __TOS_OS400__

# define OS_CODE 18

#endif

#ifdef __APPLE__

# define OS_CODE 19

#endif

#if defined(__BORLANDC__) && !defined(MSDOS)

#pragma warn -8004

#pragma warn -8008

#pragma warn -8066

#endif

/* provide prototypes for these when building zlib without LFS */

#if !defined(_WIN32) && \

(!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)

ZEXTERN uLong ZEXPORT adler32_combine64(uLong, uLong, z_off_t);

ZEXTERN uLong ZEXPORT crc32_combine64(uLong, uLong, z_off_t);

ZEXTERN uLong ZEXPORT crc32_combine_gen64(z_off_t);

#endif

/* common defaults */

#ifndef OS_CODE

# define OS_CODE 3 /* assume Unix */

#endif

#ifndef F_OPEN

# define F_OPEN(name, mode) fopen((name), (mode))

#endif

/* functions */

#if defined(pyr) || defined(Z_SOLO)

# define NO_MEMCPY

#endif

#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)

/* 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).

* The __SC__ check is for Symantec.

*/

# 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

void ZLIB_INTERNAL zmemcpy(Bytef* dest, const Bytef* source, uInt len);

int ZLIB_INTERNAL zmemcmp(const Bytef* s1, const Bytef* s2, uInt len);

void ZLIB_INTERNAL zmemzero(Bytef* dest, uInt len);

#endif

/* Diagnostic functions */

#ifdef ZLIB_DEBUG

# include <stdio.h>

extern int ZLIB_INTERNAL z_verbose;

extern void ZLIB_INTERNAL z_error(char *m);

# define Assert(cond,msg) {if(!(cond)) z_error(msg);}

# define Trace(x) {if (z_verbose>=0) fprintf x ;}

# define Tracev(x) {if (z_verbose>0) fprintf x ;}

# define Tracevv(x) {if (z_verbose>1) fprintf x ;}

# define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}

# define Tracecv(c,x) {if (z_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

#ifndef Z_SOLO

voidpf ZLIB_INTERNAL zcalloc(voidpf opaque, unsigned items,

unsigned size);

void ZLIB_INTERNAL zcfree(voidpf opaque, voidpf ptr);

#endif

#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);}

/* Reverse the bytes in a 32-bit value */

#define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \

(((q) & 0xff00) << 8) + (((q) & 0xff) << 24))

#ifdef _MSC_VER

#define zalign(x) __declspec(align(x))

#else

#define zalign(x) __attribute__((aligned((x))))

#endif

#endif /* ZUTIL_H */