mirror of
https://github.com/lz4/lz4.git
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489 lines
17 KiB
C
489 lines
17 KiB
C
/**
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* Copyright (c) 2016-present, Przemyslaw Skibinski, Yann Collet, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#ifndef UTIL_H_MODULE
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#define UTIL_H_MODULE
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#if defined (__cplusplus)
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extern "C" {
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#endif
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/* **************************************
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* Compiler Options
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****************************************/
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#if defined(__INTEL_COMPILER)
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# pragma warning(disable : 177) /* disable: message #177: function was declared but never referenced */
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#endif
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#if defined(_MSC_VER)
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# define _CRT_SECURE_NO_WARNINGS /* Disable some Visual warning messages for fopen, strncpy */
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# define _CRT_SECURE_NO_DEPRECATE /* VS2005 */
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# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
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#if _MSC_VER <= 1800 /* (1800 = Visual Studio 2013) */
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#define snprintf sprintf_s /* snprintf unsupported by Visual <= 2013 */
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#endif
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#endif
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/* Unix Large Files support (>4GB) */
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#if !defined(__LP64__) /* No point defining Large file for 64 bit */
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# define _FILE_OFFSET_BITS 64 /* turn off_t into a 64-bit type for ftello, fseeko */
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# if defined(__sun__) && !defined(_LARGEFILE_SOURCE) /* Sun Solaris 32-bits requires specific definitions */
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# define _LARGEFILE_SOURCE /* fseeko, ftello */
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# elif !defined(_LARGEFILE64_SOURCE)
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# define _LARGEFILE64_SOURCE /* off64_t, fseeko64, ftello64 */
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# endif
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#endif
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/*-****************************************
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* Dependencies
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******************************************/
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#include <stdlib.h> /* features.h with _POSIX_C_SOURCE, malloc */
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#include <stdio.h> /* fprintf */
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#include <sys/types.h> /* stat, utime */
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#include <sys/stat.h> /* stat */
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#if defined(_MSC_VER)
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#include <sys/utime.h> /* utime */
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#include <io.h> /* _chmod */
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#else
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#include <unistd.h> /* chown, stat */
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#include <utime.h> /* utime */
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#endif
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#include <time.h> /* time */
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#include <errno.h>
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/* *************************************
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* Constants
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***************************************/
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#define LIST_SIZE_INCREASE (8*1024)
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/*-****************************************
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* Compiler specifics
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******************************************/
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#if defined(__GNUC__)
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# define UTIL_STATIC static __attribute__((unused))
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#elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
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# define UTIL_STATIC static inline
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#elif defined(_MSC_VER)
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# define UTIL_STATIC static __inline
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#else
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# define UTIL_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */
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#endif
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/*-****************************************
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* Sleep functions: Windows - Posix - others
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******************************************/
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#if defined(_WIN32)
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# include <windows.h>
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# define SET_HIGH_PRIORITY SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS)
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# define UTIL_sleep(s) Sleep(1000*s)
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# define UTIL_sleepMilli(milli) Sleep(milli)
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#elif (defined(__unix__) || defined(__unix) || defined(__VMS) || defined(__midipix__) || (defined(__APPLE__) && defined(__MACH__)))
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# include <unistd.h>
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# include <sys/resource.h> /* setpriority */
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# include <time.h> /* clock_t, nanosleep, clock, CLOCKS_PER_SEC */
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# if defined(PRIO_PROCESS)
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# define SET_HIGH_PRIORITY setpriority(PRIO_PROCESS, 0, -20)
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# else
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# define SET_HIGH_PRIORITY /* disabled */
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# endif
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# define UTIL_sleep(s) sleep(s)
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# if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 199309L)
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# define UTIL_sleepMilli(milli) { struct timespec t; t.tv_sec=0; t.tv_nsec=milli*1000000ULL; nanosleep(&t, NULL); }
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# else
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# define UTIL_sleepMilli(milli) /* disabled */
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# endif
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#else
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# define SET_HIGH_PRIORITY /* disabled */
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# define UTIL_sleep(s) /* disabled */
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# define UTIL_sleepMilli(milli) /* disabled */
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#endif
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/*-**************************************************************
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* Basic Types
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*****************************************************************/
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#if !defined (__VMS) && (defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
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# include <stdint.h>
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typedef uint8_t BYTE;
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typedef uint16_t U16;
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typedef int16_t S16;
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typedef uint32_t U32;
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typedef int32_t S32;
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typedef uint64_t U64;
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typedef int64_t S64;
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#else
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typedef unsigned char BYTE;
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typedef unsigned short U16;
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typedef signed short S16;
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typedef unsigned int U32;
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typedef signed int S32;
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typedef unsigned long long U64;
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typedef signed long long S64;
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#endif
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/*-****************************************
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* Time functions
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******************************************/
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#if !defined(_WIN32)
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typedef clock_t UTIL_time_t;
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UTIL_STATIC void UTIL_initTimer(UTIL_time_t* ticksPerSecond) { *ticksPerSecond=0; }
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UTIL_STATIC void UTIL_getTime(UTIL_time_t* x) { *x = clock(); }
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UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t ticksPerSecond, UTIL_time_t clockStart, UTIL_time_t clockEnd) { (void)ticksPerSecond; return 1000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; }
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UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t ticksPerSecond, UTIL_time_t clockStart, UTIL_time_t clockEnd) { (void)ticksPerSecond; return 1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; }
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#else
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typedef LARGE_INTEGER UTIL_time_t;
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UTIL_STATIC void UTIL_initTimer(UTIL_time_t* ticksPerSecond) { if (!QueryPerformanceFrequency(ticksPerSecond)) fprintf(stderr, "ERROR: QueryPerformance not present\n"); }
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UTIL_STATIC void UTIL_getTime(UTIL_time_t* x) { QueryPerformanceCounter(x); }
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UTIL_STATIC U64 UTIL_getSpanTimeMicro(UTIL_time_t ticksPerSecond, UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart; }
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UTIL_STATIC U64 UTIL_getSpanTimeNano(UTIL_time_t ticksPerSecond, UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart; }
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#endif
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/* returns time span in microseconds */
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UTIL_STATIC U64 UTIL_clockSpanMicro( UTIL_time_t clockStart, UTIL_time_t ticksPerSecond )
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{
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UTIL_time_t clockEnd;
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UTIL_getTime(&clockEnd);
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return UTIL_getSpanTimeMicro(ticksPerSecond, clockStart, clockEnd);
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}
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UTIL_STATIC void UTIL_waitForNextTick(UTIL_time_t ticksPerSecond)
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{
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UTIL_time_t clockStart, clockEnd;
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UTIL_getTime(&clockStart);
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do {
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UTIL_getTime(&clockEnd);
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} while (UTIL_getSpanTimeNano(ticksPerSecond, clockStart, clockEnd) == 0);
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}
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/*-****************************************
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* File functions
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******************************************/
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#if defined(_MSC_VER)
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#define chmod _chmod
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typedef struct _stat64 stat_t;
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#else
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typedef struct stat stat_t;
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#endif
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UTIL_STATIC int UTIL_setFileStat(const char *filename, stat_t *statbuf)
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{
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int res = 0;
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struct utimbuf timebuf;
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timebuf.actime = time(NULL);
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timebuf.modtime = statbuf->st_mtime;
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res += utime(filename, &timebuf); /* set access and modification times */
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#if !defined(_WIN32)
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res += chown(filename, statbuf->st_uid, statbuf->st_gid); /* Copy ownership */
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#endif
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res += chmod(filename, statbuf->st_mode & 07777); /* Copy file permissions */
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errno = 0;
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return -res; /* number of errors is returned */
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}
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UTIL_STATIC int UTIL_getFileStat(const char* infilename, stat_t *statbuf)
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{
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int r;
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#if defined(_MSC_VER)
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r = _stat64(infilename, statbuf);
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if (r || !(statbuf->st_mode & S_IFREG)) return 0; /* No good... */
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#else
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r = stat(infilename, statbuf);
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if (r || !S_ISREG(statbuf->st_mode)) return 0; /* No good... */
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#endif
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return 1;
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}
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UTIL_STATIC U64 UTIL_getFileSize(const char* infilename)
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{
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int r;
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#if defined(_MSC_VER)
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struct _stat64 statbuf;
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r = _stat64(infilename, &statbuf);
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if (r || !(statbuf.st_mode & S_IFREG)) return 0; /* No good... */
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#else
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struct stat statbuf;
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r = stat(infilename, &statbuf);
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if (r || !S_ISREG(statbuf.st_mode)) return 0; /* No good... */
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#endif
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return (U64)statbuf.st_size;
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}
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UTIL_STATIC U64 UTIL_getTotalFileSize(const char** fileNamesTable, unsigned nbFiles)
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{
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U64 total = 0;
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unsigned n;
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for (n=0; n<nbFiles; n++)
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total += UTIL_getFileSize(fileNamesTable[n]);
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return total;
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}
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UTIL_STATIC int UTIL_doesFileExists(const char* infilename)
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{
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int r;
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#if defined(_MSC_VER)
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struct _stat64 statbuf;
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r = _stat64(infilename, &statbuf);
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if (r || !(statbuf.st_mode & S_IFREG)) return 0; /* No good... */
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#else
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struct stat statbuf;
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r = stat(infilename, &statbuf);
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if (r || !S_ISREG(statbuf.st_mode)) return 0; /* No good... */
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#endif
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return 1;
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}
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UTIL_STATIC U32 UTIL_isDirectory(const char* infilename)
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{
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int r;
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#if defined(_MSC_VER)
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struct _stat64 statbuf;
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r = _stat64(infilename, &statbuf);
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if (!r && (statbuf.st_mode & _S_IFDIR)) return 1;
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#else
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struct stat statbuf;
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r = stat(infilename, &statbuf);
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if (!r && S_ISDIR(statbuf.st_mode)) return 1;
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#endif
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return 0;
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}
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/*
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* A modified version of realloc().
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* If UTIL_realloc() fails the original block is freed.
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*/
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UTIL_STATIC void *UTIL_realloc(void *ptr, size_t size)
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{
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void *newptr = realloc(ptr, size);
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if (newptr) return newptr;
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free(ptr);
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return NULL;
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}
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#ifdef _WIN32
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# define UTIL_HAS_CREATEFILELIST
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UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd)
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{
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char* path;
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int dirLength, fnameLength, pathLength, nbFiles = 0;
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WIN32_FIND_DATA cFile;
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HANDLE hFile;
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dirLength = (int)strlen(dirName);
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path = (char*) malloc(dirLength + 3);
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if (!path) return 0;
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memcpy(path, dirName, dirLength);
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path[dirLength] = '\\';
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path[dirLength+1] = '*';
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path[dirLength+2] = 0;
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hFile=FindFirstFile(path, &cFile);
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if (hFile == INVALID_HANDLE_VALUE) {
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fprintf(stderr, "Cannot open directory '%s'\n", dirName);
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return 0;
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}
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free(path);
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do {
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fnameLength = (int)strlen(cFile.cFileName);
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path = (char*) malloc(dirLength + fnameLength + 2);
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if (!path) { FindClose(hFile); return 0; }
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memcpy(path, dirName, dirLength);
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path[dirLength] = '\\';
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memcpy(path+dirLength+1, cFile.cFileName, fnameLength);
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pathLength = dirLength+1+fnameLength;
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path[pathLength] = 0;
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if (cFile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
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if (strcmp (cFile.cFileName, "..") == 0 ||
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strcmp (cFile.cFileName, ".") == 0) continue;
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nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd); /* Recursively call "UTIL_prepareFileList" with the new path. */
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if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; }
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}
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else if ((cFile.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_ARCHIVE) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_COMPRESSED)) {
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if (*bufStart + *pos + pathLength >= *bufEnd) {
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ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE;
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*bufStart = (char*)UTIL_realloc(*bufStart, newListSize);
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*bufEnd = *bufStart + newListSize;
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if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; }
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}
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if (*bufStart + *pos + pathLength < *bufEnd) {
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strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos));
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*pos += pathLength + 1;
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nbFiles++;
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}
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}
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free(path);
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} while (FindNextFile(hFile, &cFile));
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FindClose(hFile);
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return nbFiles;
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}
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#elif (defined(__APPLE__) && defined(__MACH__)) || \
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((defined(__unix__) || defined(__unix) || defined(__midipix__)) && defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200112L)) /* snprintf, opendir */
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# define UTIL_HAS_CREATEFILELIST
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# include <dirent.h> /* opendir, readdir */
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UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd)
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{
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DIR *dir;
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struct dirent *entry;
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char* path;
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int dirLength, fnameLength, pathLength, nbFiles = 0;
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if (!(dir = opendir(dirName))) {
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fprintf(stderr, "Cannot open directory '%s': %s\n", dirName, strerror(errno));
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return 0;
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}
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dirLength = (int)strlen(dirName);
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errno = 0;
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while ((entry = readdir(dir)) != NULL) {
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if (strcmp (entry->d_name, "..") == 0 ||
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strcmp (entry->d_name, ".") == 0) continue;
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fnameLength = (int)strlen(entry->d_name);
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path = (char*) malloc(dirLength + fnameLength + 2);
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if (!path) { closedir(dir); return 0; }
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memcpy(path, dirName, dirLength);
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path[dirLength] = '/';
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memcpy(path+dirLength+1, entry->d_name, fnameLength);
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pathLength = dirLength+1+fnameLength;
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path[pathLength] = 0;
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if (UTIL_isDirectory(path)) {
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nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd); /* Recursively call "UTIL_prepareFileList" with the new path. */
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if (*bufStart == NULL) { free(path); closedir(dir); return 0; }
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} else {
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if (*bufStart + *pos + pathLength >= *bufEnd) {
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ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE;
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*bufStart = (char*)UTIL_realloc(*bufStart, newListSize);
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*bufEnd = *bufStart + newListSize;
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if (*bufStart == NULL) { free(path); closedir(dir); return 0; }
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}
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if (*bufStart + *pos + pathLength < *bufEnd) {
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strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos));
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*pos += pathLength + 1;
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nbFiles++;
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}
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}
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free(path);
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errno = 0; /* clear errno after UTIL_isDirectory, UTIL_prepareFileList */
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}
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if (errno != 0) {
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fprintf(stderr, "readdir(%s) error: %s\n", dirName, strerror(errno));
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free(*bufStart);
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*bufStart = NULL;
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}
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closedir(dir);
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return nbFiles;
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}
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#else
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UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd)
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{
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(void)bufStart; (void)bufEnd; (void)pos;
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fprintf(stderr, "Directory %s ignored (zstd compiled without _WIN32 or _POSIX_C_SOURCE)\n", dirName);
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return 0;
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}
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#endif /* #ifdef _WIN32 */
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/*
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* UTIL_createFileList - takes a list of files and directories (params: inputNames, inputNamesNb), scans directories,
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* and returns a new list of files (params: return value, allocatedBuffer, allocatedNamesNb).
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* After finishing usage of the list the structures should be freed with UTIL_freeFileList(params: return value, allocatedBuffer)
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* In case of error UTIL_createFileList returns NULL and UTIL_freeFileList should not be called.
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*/
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UTIL_STATIC const char** UTIL_createFileList(const char **inputNames, unsigned inputNamesNb, char** allocatedBuffer, unsigned* allocatedNamesNb)
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{
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size_t pos;
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unsigned i, nbFiles;
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char *bufend, *buf;
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const char** fileTable;
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buf = (char*)malloc(LIST_SIZE_INCREASE);
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if (!buf) return NULL;
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bufend = buf + LIST_SIZE_INCREASE;
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for (i=0, pos=0, nbFiles=0; i<inputNamesNb; i++) {
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if (!UTIL_isDirectory(inputNames[i])) {
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size_t len = strlen(inputNames[i]);
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if (buf + pos + len >= bufend) {
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ptrdiff_t newListSize = (bufend - buf) + LIST_SIZE_INCREASE;
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buf = (char*)UTIL_realloc(buf, newListSize);
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bufend = buf + newListSize;
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if (!buf) return NULL;
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}
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if (buf + pos + len < bufend) {
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strncpy(buf + pos, inputNames[i], bufend - (buf + pos));
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pos += len + 1;
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nbFiles++;
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}
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} else {
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nbFiles += UTIL_prepareFileList(inputNames[i], &buf, &pos, &bufend);
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if (buf == NULL) return NULL;
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} }
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if (nbFiles == 0) { free(buf); return NULL; }
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|
|
fileTable = (const char**)malloc((nbFiles+1) * sizeof(const char*));
|
|
if (!fileTable) { free(buf); return NULL; }
|
|
|
|
for (i=0, pos=0; i<nbFiles; i++)
|
|
{
|
|
fileTable[i] = buf + pos;
|
|
pos += strlen(fileTable[i]) + 1;
|
|
}
|
|
|
|
if (buf + pos > bufend) { free(buf); free((void*)fileTable); return NULL; }
|
|
|
|
*allocatedBuffer = buf;
|
|
*allocatedNamesNb = nbFiles;
|
|
|
|
return fileTable;
|
|
}
|
|
|
|
|
|
UTIL_STATIC void UTIL_freeFileList(const char** filenameTable, char* allocatedBuffer)
|
|
{
|
|
if (allocatedBuffer) free(allocatedBuffer);
|
|
if (filenameTable) free((void*)filenameTable);
|
|
}
|
|
|
|
|
|
#if defined (__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* UTIL_H_MODULE */
|