Descent3/unzip/zutil.h

/*
* Descent 3 
* Copyright (C) 2024 Parallax Software
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/*
 * $Logfile: /DescentIII/Main/unzip/zutil.h $
 * $Revision: 2 $
 * $Date: 8/13/99 8:02p $
 * $Author: Jeff $
 *
 * <insert description of file here>
 *
 * $Log: /DescentIII/Main/unzip/zutil.h $
 *
 * 2     8/13/99 8:02p Jeff
 * initial creation of zip class
 *
 * $NoKeywords: $
 */

/* zutil.h -- internal interface and configuration of the compression library
 * Copyright (C) 1995-1998 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.
 */

/* @(#) $Id$ */

#ifndef _Z_UTIL_H
#define _Z_UTIL_H

#include "zlib.h"

#ifdef STDC
#include <stddef.h>
#include <string.h>
#include <stdlib.h>
#endif
#ifdef NO_ERRNO_H
extern int errno;
#else
#include <errno.h>
#endif

#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
#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

#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 F_OPEN(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

#if defined(MACOS) || defined(TARGET_OS_MAC)
#define OS_CODE 0x07
#if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
#include <unix.h> /* for fdopen */
#else
#ifndef fdopen
#define fdopen(fd, mode) NULL /* No fdopen() */
#endif
#endif
#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

#if (defined(_MSC_VER) && (_MSC_VER > 600))
#define fdopen(fd, type) _fdopen(fd, type)
#endif

/* Common defaults */

#ifndef OS_CODE
#define OS_CODE 0x03 /* assume Unix */
#endif

#ifndef F_OPEN
#define F_OPEN(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(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
extern void zmemcpy OF((Bytef * dest, const Bytef *source, uInt len));
extern int zmemcmp OF((const Bytef *s1, const Bytef *s2, uInt len));
extern void zmemzero OF((Bytef * dest, uInt len));
#endif

/* Diagnostic functions */
#ifdef DEBUG
#include <stdio.h>
extern int z_verbose;
extern void z_error OF((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

typedef uLong(ZEXPORT *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 */