mirror of
https://github.com/ClickHouse/ClickHouse.git
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186 lines
5.3 KiB
C++
186 lines
5.3 KiB
C++
#ifndef ZUTIL_H_
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#define ZUTIL_H_
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/* zutil.h -- internal interface and configuration of the compression library
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* Copyright (C) 1995-2013 Jean-loup Gailly.
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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/* WARNING: this file should *not* be used by applications. It is
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part of the implementation of the compression library and is
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subject to change. Applications should only use zlib.h.
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*/
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/* @(#) $Id$ */
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#if defined(HAVE_INTERNAL)
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# define ZLIB_INTERNAL __attribute__((visibility ("internal")))
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#elif defined(HAVE_HIDDEN)
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# define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
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#else
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# define ZLIB_INTERNAL
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#endif
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#include <stddef.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include "zlib.h"
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#ifndef local
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# define local static
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#endif
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/* compile with -Dlocal if your debugger can't find static symbols */
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typedef unsigned char uch; /* Included for compatibility with external code only */
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typedef uint16_t ush; /* Included for compatibility with external code only */
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typedef unsigned long ulg;
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extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
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/* (size given to avoid silly warnings with Visual C++) */
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#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
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#define ERR_RETURN(strm, err) return (strm->msg = ERR_MSG(err), (err))
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/* To be used only when the state is known to be valid */
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/* common constants */
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#ifndef DEF_WBITS
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# define DEF_WBITS MAX_WBITS
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#endif
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/* default windowBits for decompression. MAX_WBITS is for compression only */
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#if MAX_MEM_LEVEL >= 8
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# define DEF_MEM_LEVEL 8
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#else
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# define DEF_MEM_LEVEL MAX_MEM_LEVEL
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#endif
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/* default memLevel */
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#define STORED_BLOCK 0
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#define STATIC_TREES 1
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#define DYN_TREES 2
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/* The three kinds of block type */
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#define MIN_MATCH 3
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#define MAX_MATCH 258
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/* The minimum and maximum match lengths */
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#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
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/* target dependencies */
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#ifdef WIN32
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# ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */
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# define OS_CODE 0x0b
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# endif
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#endif
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#if (defined(_MSC_VER) && (_MSC_VER > 600))
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# define fdopen(fd, type) _fdopen(fd, type)
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#endif
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/* provide prototypes for these when building zlib without LFS */
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#if !defined(WIN32) && !defined(__MSYS__) && (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
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ZEXTERN uint32_t ZEXPORT adler32_combine64(uint32_t, uint32_t, z_off_t);
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ZEXTERN uint32_t ZEXPORT crc32_combine64(uint32_t, uint32_t, z_off_t);
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#endif
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/* MS Visual Studio does not allow inline in C, only C++.
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But it provides __inline instead, so use that. */
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#if defined(_MSC_VER) && !defined(inline)
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# define inline __inline
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#endif
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/* common defaults */
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#ifndef OS_CODE
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# define OS_CODE 0x03 /* assume Unix */
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#endif
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#ifndef F_OPEN
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# define F_OPEN(name, mode) fopen((name), (mode))
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#endif
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/* functions */
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/* Diagnostic functions */
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#ifdef DEBUG
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# include <stdio.h>
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extern int ZLIB_INTERNAL z_verbose;
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extern void ZLIB_INTERNAL z_error(char *m);
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# define Assert(cond, msg) {if(!(cond)) z_error(msg);}
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# define Trace(x) {if (z_verbose >= 0) fprintf x;}
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# define Tracev(x) {if (z_verbose > 0) fprintf x;}
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# define Tracevv(x) {if (z_verbose > 1) fprintf x;}
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# define Tracec(c, x) {if (z_verbose > 0 && (c)) fprintf x;}
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# define Tracecv(c, x) {if (z_verbose > 1 && (c)) fprintf x;}
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#else
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# define Assert(cond, msg)
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# define Trace(x)
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# define Tracev(x)
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# define Tracevv(x)
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# define Tracec(c, x)
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# define Tracecv(c, x)
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#endif
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void ZLIB_INTERNAL *zcalloc(void *opaque, unsigned items, unsigned size);
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void ZLIB_INTERNAL zcfree(void *opaque, void *ptr);
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#define ZALLOC(strm, items, size) (*((strm)->zalloc))((strm)->opaque, (items), (size))
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#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (void *)(addr))
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#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
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/* Reverse the bytes in a 32-bit value. Use compiler intrinsics when
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possible to take advantage of hardware implementations. */
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#if defined(WIN32) && (_MSC_VER >= 1300)
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# pragma intrinsic(_byteswap_ulong)
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# define ZSWAP32(q) _byteswap_ulong(q)
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#elif defined(__Clang__) || (defined(__GNUC__) && \
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(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 2)))
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# define ZSWAP32(q) __builtin_bswap32(q)
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#elif defined(__GNUC__) && (__GNUC__ >= 2) && defined(__linux__)
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# include <byteswap.h>
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# define ZSWAP32(q) bswap_32(q)
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#elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
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# include <sys/endian.h>
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# define ZSWAP32(q) bswap32(q)
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#elif defined(__INTEL_COMPILER)
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# define ZSWAP32(q) _bswap(q)
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#else
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# define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
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(((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
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#endif /* ZSWAP32 */
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/* Only enable likely/unlikely if the compiler is known to support it */
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#if (defined(__GNUC__) && (__GNUC__ >= 3)) || defined(__INTEL_COMPILER) || defined(__Clang__)
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# ifndef likely
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# define likely(x) __builtin_expect(!!(x), 1)
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# endif
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# ifndef unlikely
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# define unlikely(x) __builtin_expect(!!(x), 0)
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# endif
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#else
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# ifndef likely
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# define likely(x) x
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# endif
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# ifndef unlikely
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# define unlikely(x) x
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# endif
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#endif /* (un)likely */
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#if defined(_MSC_VER)
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#define ALIGNED_(x) __declspec(align(x))
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#else
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#if defined(__GNUC__)
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#define ALIGNED_(x) __attribute__ ((aligned(x)))
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#endif
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#endif
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#endif /* ZUTIL_H_ */
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