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cf9127a231
zlib-ng/zutil.h
Hans Kristian Rosbach cf9127a231 Separate MIN_MATCH into STD_MIN_MATCH and WANT_MIN_MATCH 
Rename MAX_MATCH to STD_MAX_MATCH
2021-06-13 20:55:01 +02:00

262 lines
7.6 KiB
C
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#ifndef ZUTIL_H_
#define ZUTIL_H_
/* zutil.h -- internal interface and configuration of the compression library
* Copyright (C) 1995-2016 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.
*/
#if defined(HAVE_VISIBILITY_INTERNAL)
# define Z_INTERNAL __attribute__((visibility ("internal")))
#elif defined(HAVE_VISIBILITY_HIDDEN)
# define Z_INTERNAL __attribute__((visibility ("hidden")))
#else
# define Z_INTERNAL
#endif
#ifndef __cplusplus
# define Z_REGISTER register
#else
# define Z_REGISTER
#endif
#ifndef Z_TLS
# define Z_TLS
#endif
#include <stddef.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#ifdef ZLIB_COMPAT
# include "zlib.h"
#else
# include "zlib-ng.h"
#endif
#include "zbuild.h"
typedef unsigned char uch; /* Included for compatibility with external code only */
typedef uint16_t ush; /* Included for compatibility with external code only */
typedef unsigned long ulg;
extern z_const char * const PREFIX(z_errmsg)[10]; /* indexed by 2-zlib_error */
/* (size given to avoid silly warnings with Visual C++) */
#define ERR_MSG(err) PREFIX(z_errmsg)[Z_NEED_DICT-(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 STD_MIN_MATCH 3
#define STD_MAX_MATCH 258
/* The minimum and maximum match lengths mandated by the deflate standard */
#define WANT_MIN_MATCH 4
/* The minimum wanted match length, affects deflate_quick, deflate_fast, deflate_medium and deflate_slow */
#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
#define ADLER32_INITIAL_VALUE 1 /* initial adler-32 hash value */
/* target dependencies */
#ifdef AMIGA
# define OS_CODE 1
#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
#endif
#if defined(MACOS) || defined(TARGET_OS_MAC)
# define OS_CODE 7
#endif
#ifdef __acorn
# define OS_CODE 13
#endif
#if defined(_WIN32) && !defined(__CYGWIN__)
# define OS_CODE 10
#endif
#ifdef __APPLE__
# define OS_CODE 19
#endif
#if (defined(_MSC_VER) && (_MSC_VER > 600))
# define fdopen(fd, type) _fdopen(fd, type)
#endif
/* MS Visual Studio does not allow inline in C, only C++.
But it provides __inline instead, so use that. */
#if defined(_MSC_VER) && !defined(inline) && !defined(__cplusplus)
# define inline __inline
#endif
/* common defaults */
#ifndef OS_CODE
# define OS_CODE 3 /* assume Unix */
#endif
/* functions */
/* Diagnostic functions */
#ifdef ZLIB_DEBUG
# include <stdio.h>
extern int Z_INTERNAL z_verbose;
extern void Z_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
void Z_INTERNAL *zng_calloc(void *opaque, unsigned items, unsigned size);
void Z_INTERNAL zng_cfree(void *opaque, void *ptr);
#define ZALLOC(strm, items, size) (*((strm)->zalloc))((strm)->opaque, (items), (size))
#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (void *)(addr))
#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
/* Reverse the bytes in a value. Use compiler intrinsics when
possible to take advantage of hardware implementations. */
#if defined(_MSC_VER) && (_MSC_VER >= 1300)
# pragma intrinsic(_byteswap_ulong)
# define ZSWAP16(q) _byteswap_ushort(q)
# define ZSWAP32(q) _byteswap_ulong(q)
# define ZSWAP64(q) _byteswap_uint64(q)
#elif defined(__Clang__) || (defined(__GNUC__) && \
(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)))
# define ZSWAP16(q) __builtin_bswap16(q)
# define ZSWAP32(q) __builtin_bswap32(q)
# define ZSWAP64(q) __builtin_bswap64(q)
#elif defined(__GNUC__) && (__GNUC__ >= 2) && defined(__linux__)
# include <byteswap.h>
# define ZSWAP16(q) bswap_16(q)
# define ZSWAP32(q) bswap_32(q)
# define ZSWAP64(q) bswap_64(q)
#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
# include <sys/endian.h>
# define ZSWAP16(q) bswap16(q)
# define ZSWAP32(q) bswap32(q)
# define ZSWAP64(q) bswap64(q)
#elif defined(__OpenBSD__)
# include <sys/endian.h>
# define ZSWAP16(q) swap16(q)
# define ZSWAP32(q) swap32(q)
# define ZSWAP64(q) swap64(q)
#elif defined(__INTEL_COMPILER)
/* ICC does not provide a two byte swap. */
# define ZSWAP16(q) ((((q) & 0xff) << 8) | (((q) & 0xff00) >> 8))
# define ZSWAP32(q) _bswap(q)
# define ZSWAP64(q) _bswap64(q)
#else
# define ZSWAP16(q) ((((q) & 0xff) << 8) | (((q) & 0xff00) >> 8))
# define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
(((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
# define ZSWAP64(q) \
((q & 0xFF00000000000000u) >> 56u) | \
((q & 0x00FF000000000000u) >> 40u) | \
((q & 0x0000FF0000000000u) >> 24u) | \
((q & 0x000000FF00000000u) >> 8u) | \
((q & 0x00000000FF000000u) << 8u) | \
((q & 0x0000000000FF0000u) << 24u) | \
((q & 0x000000000000FF00u) << 40u) | \
((q & 0x00000000000000FFu) << 56u)
#endif
/* Only enable likely/unlikely if the compiler is known to support it */
#if (defined(__GNUC__) && (__GNUC__ >= 3)) || defined(__INTEL_COMPILER) || defined(__Clang__)
# define LIKELY_NULL(x) __builtin_expect((x) != 0, 0)
# define LIKELY(x) __builtin_expect(!!(x), 1)
# define UNLIKELY(x) __builtin_expect(!!(x), 0)
# define PREFETCH_L1(addr) __builtin_prefetch(addr, 0, 3)
# define PREFETCH_L2(addr) __builtin_prefetch(addr, 0, 2)
# define PREFETCH_RW(addr) __builtin_prefetch(addr, 1, 2)
#elif defined(__WIN__)
# include <xmmintrin.h>
# define LIKELY_NULL(x) x
# define LIKELY(x) x
# define UNLIKELY(x) x
# define PREFETCH_L1(addr) _mm_prefetch((char *) addr, _MM_HINT_T0)
# define PREFETCH_L2(addr) _mm_prefetch((char *) addr, _MM_HINT_T1)
# define PREFETCH_RW(addr) _mm_prefetch((char *) addr, _MM_HINT_T1)
#else
# define LIKELY_NULL(x) x
# define LIKELY(x) x
# define UNLIKELY(x) x
# define PREFETCH_L1(addr) addr
# define PREFETCH_L2(addr) addr
# define PREFETCH_RW(addr) addr
#endif /* (un)likely */
#if defined(_MSC_VER)
# define ALIGNED_(x) __declspec(align(x))
#else
# if defined(__GNUC__)
# define ALIGNED_(x) __attribute__ ((aligned(x)))
# endif
#endif
#if defined(X86_FEATURES)
# include "arch/x86/x86.h"
#elif defined(ARM_FEATURES)
# include "arch/arm/arm.h"
#elif defined(POWER_FEATURES)
# include "arch/power/power.h"
#endif
#endif /* ZUTIL_H_ */
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