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zstd/programs/util.h
Rohit Jain 91b2fed8f8 Moving more function to the new C file
2018-10-11 17:34:47 -07:00

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7.7 KiB
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/*
* Copyright (c) 2016-present, Przemyslaw Skibinski, Yann Collet, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under both the BSD-style license (found in the
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
* in the COPYING file in the root directory of this source tree).
* You may select, at your option, one of the above-listed licenses.
*/
#ifndef UTIL_H_MODULE
#define UTIL_H_MODULE
#if defined (__cplusplus)
extern "C" {
#endif
/*-****************************************
* Dependencies
******************************************/
#include "platform.h" /* PLATFORM_POSIX_VERSION, ZSTD_NANOSLEEP_SUPPORT, ZSTD_SETPRIORITY_SUPPORT */
#include <stdlib.h> /* malloc */
#include <stddef.h> /* size_t, ptrdiff_t */
#include <stdio.h> /* fprintf */
#include <string.h> /* strncmp */
#include <sys/types.h> /* stat, utime */
#include <sys/stat.h> /* stat, chmod */
#if defined(_MSC_VER)
# include <sys/utime.h> /* utime */
# include <io.h> /* _chmod */
#else
# include <unistd.h> /* chown, stat */
# include <utime.h> /* utime */
#endif
#include <time.h> /* clock_t, clock, CLOCKS_PER_SEC, nanosleep */
#include <errno.h>
#include "mem.h" /* U32, U64 */
/*-************************************************************
* Avoid fseek()'s 2GiB barrier with MSVC, macOS, *BSD, MinGW
***************************************************************/
#if defined(_MSC_VER) && (_MSC_VER >= 1400)
# define UTIL_fseek _fseeki64
#elif !defined(__64BIT__) && (PLATFORM_POSIX_VERSION >= 200112L) /* No point defining Large file for 64 bit */
# define UTIL_fseek fseeko
#elif defined(__MINGW32__) && defined(__MSVCRT__) && !defined(__STRICT_ANSI__) && !defined(__NO_MINGW_LFS)
# define UTIL_fseek fseeko64
#else
# define UTIL_fseek fseek
#endif
/*-*************************************************
* Sleep & priority functions: Windows - Posix - others
***************************************************/
#if defined(_WIN32)
# include <windows.h>
# define SET_REALTIME_PRIORITY SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS)
# define UTIL_sleep(s) Sleep(1000*s)
# define UTIL_sleepMilli(milli) Sleep(milli)
#elif PLATFORM_POSIX_VERSION > 0 /* Unix-like operating system */
# include <unistd.h> /* sleep */
# define UTIL_sleep(s) sleep(s)
# if ZSTD_NANOSLEEP_SUPPORT /* necessarily defined in platform.h */
# define UTIL_sleepMilli(milli) { struct timespec t; t.tv_sec=0; t.tv_nsec=milli*1000000ULL; nanosleep(&t, NULL); }
# else
# define UTIL_sleepMilli(milli) /* disabled */
# endif
# if ZSTD_SETPRIORITY_SUPPORT
# include <sys/resource.h> /* setpriority */
# define SET_REALTIME_PRIORITY setpriority(PRIO_PROCESS, 0, -20)
# else
# define SET_REALTIME_PRIORITY /* disabled */
# endif
#else /* unknown non-unix operating systen */
# define UTIL_sleep(s) /* disabled */
# define UTIL_sleepMilli(milli) /* disabled */
# define SET_REALTIME_PRIORITY /* disabled */
#endif
/*-*************************************
* Constants
***************************************/
#define LIST_SIZE_INCREASE (8*1024)
/*-****************************************
* Compiler specifics
******************************************/
#if defined(__INTEL_COMPILER)
# pragma warning(disable : 177) /* disable: message #177: function was declared but never referenced, useful with UTIL_STATIC */
#endif
#if defined(__GNUC__)
# define UTIL_STATIC static __attribute__((unused))
#elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
# define UTIL_STATIC static inline
#elif defined(_MSC_VER)
# define UTIL_STATIC static __inline
#else
# define UTIL_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */
#endif
/*-****************************************
* Console log
******************************************/
extern int g_utilDisplayLevel;
#define UTIL_DISPLAY(...) fprintf(stderr, __VA_ARGS__)
#define UTIL_DISPLAYLEVEL(l, ...) { if (g_utilDisplayLevel>=l) { UTIL_DISPLAY(__VA_ARGS__); } }
/*-****************************************
* Time functions
******************************************/
#if defined(_WIN32) /* Windows */
#define UTIL_TIME_INITIALIZER { { 0, 0 } }
typedef LARGE_INTEGER UTIL_time_t;
#elif defined(__APPLE__) && defined(__MACH__)
#include <mach/mach_time.h>
#define UTIL_TIME_INITIALIZER 0
typedef U64 UTIL_time_t;
#elif (PLATFORM_POSIX_VERSION >= 200112L) \
&& (defined(__UCLIBC__) \
|| (defined(__GLIBC__) \
&& ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 17) \
|| (__GLIBC__ > 2))))
#define UTIL_TIME_INITIALIZER { 0, 0 }
typedef struct timespec UTIL_freq_t;
typedef struct timespec UTIL_time_t;
UTIL_time_t UTIL_getSpanTime(UTIL_time_t begin, UTIL_time_t end);
#else /* relies on standard C (note : clock_t measurements can be wrong when using multi-threading) */
typedef clock_t UTIL_time_t;
#define UTIL_TIME_INITIALIZER 0
#endif
UTIL_time_t UTIL_getTime(void);
U64 UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd);
U64 UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd);
#define SEC_TO_MICRO 1000000
/* returns time span in microseconds */
U64 UTIL_clockSpanMicro(UTIL_time_t clockStart);
/* returns time span in microseconds */
U64 UTIL_clockSpanNano(UTIL_time_t clockStart);
void UTIL_waitForNextTick(void);
/*-****************************************
* File functions
******************************************/
#if defined(_MSC_VER)
#define chmod _chmod
typedef struct __stat64 stat_t;
#else
typedef struct stat stat_t;
#endif
int UTIL_isRegularFile(const char* infilename);
int UTIL_setFileStat(const char *filename, stat_t *statbuf);
U32 UTIL_isDirectory(const char* infilename);
int UTIL_getFileStat(const char* infilename, stat_t *statbuf);
U32 UTIL_isLink(const char* infilename);
#define UTIL_FILESIZE_UNKNOWN ((U64)(-1))
U64 UTIL_getFileSize(const char* infilename);
U64 UTIL_getTotalFileSize(const char* const * const fileNamesTable, unsigned nbFiles);
/*
* A modified version of realloc().
* If UTIL_realloc() fails the original block is freed.
*/
UTIL_STATIC void *UTIL_realloc(void *ptr, size_t size)
{
void *newptr = realloc(ptr, size);
if (newptr) return newptr;
free(ptr);
return NULL;
}
int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd, int followLinks);
#ifdef _WIN32
# define UTIL_HAS_CREATEFILELIST
#elif defined(__linux__) || (PLATFORM_POSIX_VERSION >= 200112L) /* opendir, readdir require POSIX.1-2001 */
# define UTIL_HAS_CREATEFILELIST
# include <dirent.h> /* opendir, readdir */
# include <string.h> /* strerror, memcpy */
#else
#endif /* #ifdef _WIN32 */
/*
* UTIL_createFileList - takes a list of files and directories (params: inputNames, inputNamesNb), scans directories,
* and returns a new list of files (params: return value, allocatedBuffer, allocatedNamesNb).
* After finishing usage of the list the structures should be freed with UTIL_freeFileList(params: return value, allocatedBuffer)
* In case of error UTIL_createFileList returns NULL and UTIL_freeFileList should not be called.
*/
const char**
UTIL_createFileList(const char **inputNames, unsigned inputNamesNb,
char** allocatedBuffer, unsigned* allocatedNamesNb,
int followLinks);
UTIL_STATIC void UTIL_freeFileList(const char** filenameTable, char* allocatedBuffer)
{
if (allocatedBuffer) free(allocatedBuffer);
if (filenameTable) free((void*)filenameTable);
}
int UTIL_countPhysicalCores(void);
#if defined (__cplusplus)
}
#endif
#endif /* UTIL_H_MODULE */
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