mirror of
https://github.com/lz4/lz4.git
synced 2024-12-04 07:15:29 +08:00
504 lines
17 KiB
C
504 lines
17 KiB
C
/*
|
|
util.h - utility functions
|
|
Copyright (C) 2016-present, Przemyslaw Skibinski, Yann Collet
|
|
|
|
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 2 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, write to the Free Software Foundation, Inc.,
|
|
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
|
|
You can contact the author at :
|
|
- LZ4 source repository : https://github.com/lz4/lz4
|
|
- LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
|
|
*/
|
|
#ifndef UTIL_H_MODULE
|
|
#define UTIL_H_MODULE
|
|
|
|
#if defined (__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* **************************************
|
|
* Compiler Options
|
|
****************************************/
|
|
#if defined(__INTEL_COMPILER)
|
|
# pragma warning(disable : 177) /* disable: message #177: function was declared but never referenced */
|
|
#endif
|
|
#if defined(_MSC_VER)
|
|
# define _CRT_SECURE_NO_WARNINGS /* Disable some Visual warning messages for fopen, strncpy */
|
|
# define _CRT_SECURE_NO_DEPRECATE /* VS2005 */
|
|
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
|
|
#if _MSC_VER <= 1800 /* (1800 = Visual Studio 2013) */
|
|
#define snprintf sprintf_s /* snprintf unsupported by Visual <= 2013 */
|
|
#endif
|
|
#endif
|
|
|
|
|
|
/* Unix Large Files support (>4GB) */
|
|
#if !defined(__LP64__) /* No point defining Large file for 64 bit */
|
|
# define _FILE_OFFSET_BITS 64 /* turn off_t into a 64-bit type for ftello, fseeko */
|
|
# if defined(__sun__) && !defined(_LARGEFILE_SOURCE) /* Sun Solaris 32-bits requires specific definitions */
|
|
# define _LARGEFILE_SOURCE /* fseeko, ftello */
|
|
# elif !defined(_LARGEFILE64_SOURCE)
|
|
# define _LARGEFILE64_SOURCE /* off64_t, fseeko64, ftello64 */
|
|
# endif
|
|
#endif
|
|
|
|
|
|
/*-****************************************
|
|
* Dependencies
|
|
******************************************/
|
|
#include <stdlib.h> /* features.h with _POSIX_C_SOURCE, malloc */
|
|
#include <stdio.h> /* fprintf */
|
|
#include <string.h> /* strerr, strlen, memcpy */
|
|
#include <stddef.h> /* ptrdiff_t */
|
|
#include <sys/types.h> /* stat, utime */
|
|
#include <sys/stat.h> /* stat */
|
|
#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> /* time */
|
|
#include <errno.h>
|
|
|
|
|
|
/* *************************************
|
|
* Constants
|
|
***************************************/
|
|
#define LIST_SIZE_INCREASE (8*1024)
|
|
|
|
|
|
/*-****************************************
|
|
* Compiler specifics
|
|
******************************************/
|
|
#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
|
|
|
|
|
|
/*-****************************************
|
|
* Sleep functions: Windows - Posix - others
|
|
******************************************/
|
|
#if defined(_WIN32)
|
|
# include <windows.h>
|
|
# define SET_HIGH_PRIORITY SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS)
|
|
# define UTIL_sleep(s) Sleep(1000*s)
|
|
# define UTIL_sleepMilli(milli) Sleep(milli)
|
|
#elif (defined(__unix__) || defined(__unix) || defined(__VMS) || defined(__midipix__) || (defined(__APPLE__) && defined(__MACH__)))
|
|
# include <unistd.h>
|
|
# include <sys/resource.h> /* setpriority */
|
|
# include <time.h> /* clock_t, nanosleep, clock, CLOCKS_PER_SEC */
|
|
# if defined(PRIO_PROCESS)
|
|
# define SET_HIGH_PRIORITY setpriority(PRIO_PROCESS, 0, -20)
|
|
# else
|
|
# define SET_HIGH_PRIORITY /* disabled */
|
|
# endif
|
|
# define UTIL_sleep(s) sleep(s)
|
|
# if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 199309L)
|
|
# 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
|
|
#else
|
|
# define SET_HIGH_PRIORITY /* disabled */
|
|
# define UTIL_sleep(s) /* disabled */
|
|
# define UTIL_sleepMilli(milli) /* disabled */
|
|
#endif
|
|
|
|
|
|
/*-**************************************************************
|
|
* Basic Types
|
|
*****************************************************************/
|
|
#if !defined (__VMS) && (defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
|
|
# include <stdint.h>
|
|
typedef uint8_t BYTE;
|
|
typedef uint16_t U16;
|
|
typedef int16_t S16;
|
|
typedef uint32_t U32;
|
|
typedef int32_t S32;
|
|
typedef uint64_t U64;
|
|
typedef int64_t S64;
|
|
#else
|
|
typedef unsigned char BYTE;
|
|
typedef unsigned short U16;
|
|
typedef signed short S16;
|
|
typedef unsigned int U32;
|
|
typedef signed int S32;
|
|
typedef unsigned long long U64;
|
|
typedef signed long long S64;
|
|
#endif
|
|
|
|
|
|
/*-****************************************
|
|
* Time functions
|
|
******************************************/
|
|
#if !defined(_WIN32)
|
|
typedef clock_t UTIL_time_t;
|
|
UTIL_STATIC void UTIL_initTimer(UTIL_time_t* ticksPerSecond) { *ticksPerSecond=0; }
|
|
UTIL_STATIC void UTIL_getTime(UTIL_time_t* x) { *x = clock(); }
|
|
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; }
|
|
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; }
|
|
#else
|
|
typedef LARGE_INTEGER UTIL_time_t;
|
|
UTIL_STATIC void UTIL_initTimer(UTIL_time_t* ticksPerSecond) { if (!QueryPerformanceFrequency(ticksPerSecond)) fprintf(stderr, "ERROR: QueryPerformance not present\n"); }
|
|
UTIL_STATIC void UTIL_getTime(UTIL_time_t* x) { QueryPerformanceCounter(x); }
|
|
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; }
|
|
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; }
|
|
#endif
|
|
|
|
|
|
/* returns time span in microseconds */
|
|
UTIL_STATIC U64 UTIL_clockSpanMicro( UTIL_time_t clockStart, UTIL_time_t ticksPerSecond )
|
|
{
|
|
UTIL_time_t clockEnd;
|
|
UTIL_getTime(&clockEnd);
|
|
return UTIL_getSpanTimeMicro(ticksPerSecond, clockStart, clockEnd);
|
|
}
|
|
|
|
|
|
UTIL_STATIC void UTIL_waitForNextTick(UTIL_time_t ticksPerSecond)
|
|
{
|
|
UTIL_time_t clockStart, clockEnd;
|
|
UTIL_getTime(&clockStart);
|
|
do {
|
|
UTIL_getTime(&clockEnd);
|
|
} while (UTIL_getSpanTimeNano(ticksPerSecond, clockStart, clockEnd) == 0);
|
|
}
|
|
|
|
|
|
|
|
/*-****************************************
|
|
* File functions
|
|
******************************************/
|
|
#if defined(_MSC_VER)
|
|
#define chmod _chmod
|
|
typedef struct _stat64 stat_t;
|
|
#else
|
|
typedef struct stat stat_t;
|
|
#endif
|
|
|
|
|
|
UTIL_STATIC int UTIL_setFileStat(const char *filename, stat_t *statbuf)
|
|
{
|
|
int res = 0;
|
|
struct utimbuf timebuf;
|
|
|
|
timebuf.actime = time(NULL);
|
|
timebuf.modtime = statbuf->st_mtime;
|
|
res += utime(filename, &timebuf); /* set access and modification times */
|
|
|
|
#if !defined(_WIN32)
|
|
res += chown(filename, statbuf->st_uid, statbuf->st_gid); /* Copy ownership */
|
|
#endif
|
|
|
|
res += chmod(filename, statbuf->st_mode & 07777); /* Copy file permissions */
|
|
|
|
errno = 0;
|
|
return -res; /* number of errors is returned */
|
|
}
|
|
|
|
|
|
UTIL_STATIC int UTIL_getFileStat(const char* infilename, stat_t *statbuf)
|
|
{
|
|
int r;
|
|
#if defined(_MSC_VER)
|
|
r = _stat64(infilename, statbuf);
|
|
if (r || !(statbuf->st_mode & S_IFREG)) return 0; /* No good... */
|
|
#else
|
|
r = stat(infilename, statbuf);
|
|
if (r || !S_ISREG(statbuf->st_mode)) return 0; /* No good... */
|
|
#endif
|
|
return 1;
|
|
}
|
|
|
|
|
|
UTIL_STATIC U64 UTIL_getFileSize(const char* infilename)
|
|
{
|
|
int r;
|
|
#if defined(_MSC_VER)
|
|
struct _stat64 statbuf;
|
|
r = _stat64(infilename, &statbuf);
|
|
if (r || !(statbuf.st_mode & S_IFREG)) return 0; /* No good... */
|
|
#else
|
|
struct stat statbuf;
|
|
r = stat(infilename, &statbuf);
|
|
if (r || !S_ISREG(statbuf.st_mode)) return 0; /* No good... */
|
|
#endif
|
|
return (U64)statbuf.st_size;
|
|
}
|
|
|
|
|
|
UTIL_STATIC U64 UTIL_getTotalFileSize(const char** fileNamesTable, unsigned nbFiles)
|
|
{
|
|
U64 total = 0;
|
|
unsigned n;
|
|
for (n=0; n<nbFiles; n++)
|
|
total += UTIL_getFileSize(fileNamesTable[n]);
|
|
return total;
|
|
}
|
|
|
|
|
|
UTIL_STATIC int UTIL_doesFileExists(const char* infilename)
|
|
{
|
|
int r;
|
|
#if defined(_MSC_VER)
|
|
struct _stat64 statbuf;
|
|
r = _stat64(infilename, &statbuf);
|
|
if (r || !(statbuf.st_mode & S_IFREG)) return 0; /* No good... */
|
|
#else
|
|
struct stat statbuf;
|
|
r = stat(infilename, &statbuf);
|
|
if (r || !S_ISREG(statbuf.st_mode)) return 0; /* No good... */
|
|
#endif
|
|
return 1;
|
|
}
|
|
|
|
|
|
UTIL_STATIC U32 UTIL_isDirectory(const char* infilename)
|
|
{
|
|
int r;
|
|
#if defined(_MSC_VER)
|
|
struct _stat64 statbuf;
|
|
r = _stat64(infilename, &statbuf);
|
|
if (!r && (statbuf.st_mode & _S_IFDIR)) return 1;
|
|
#else
|
|
struct stat statbuf;
|
|
r = stat(infilename, &statbuf);
|
|
if (!r && S_ISDIR(statbuf.st_mode)) return 1;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
|
|
#ifdef _WIN32
|
|
# define UTIL_HAS_CREATEFILELIST
|
|
|
|
UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd)
|
|
{
|
|
char* path;
|
|
int dirLength, fnameLength, pathLength, nbFiles = 0;
|
|
WIN32_FIND_DATA cFile;
|
|
HANDLE hFile;
|
|
|
|
dirLength = (int)strlen(dirName);
|
|
path = (char*) malloc(dirLength + 3);
|
|
if (!path) return 0;
|
|
|
|
memcpy(path, dirName, dirLength);
|
|
path[dirLength] = '\\';
|
|
path[dirLength+1] = '*';
|
|
path[dirLength+2] = 0;
|
|
|
|
hFile=FindFirstFile(path, &cFile);
|
|
if (hFile == INVALID_HANDLE_VALUE) {
|
|
fprintf(stderr, "Cannot open directory '%s'\n", dirName);
|
|
return 0;
|
|
}
|
|
free(path);
|
|
|
|
do {
|
|
fnameLength = (int)strlen(cFile.cFileName);
|
|
path = (char*) malloc(dirLength + fnameLength + 2);
|
|
if (!path) { FindClose(hFile); return 0; }
|
|
memcpy(path, dirName, dirLength);
|
|
path[dirLength] = '\\';
|
|
memcpy(path+dirLength+1, cFile.cFileName, fnameLength);
|
|
pathLength = dirLength+1+fnameLength;
|
|
path[pathLength] = 0;
|
|
if (cFile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
|
|
if (strcmp (cFile.cFileName, "..") == 0 ||
|
|
strcmp (cFile.cFileName, ".") == 0) continue;
|
|
|
|
nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd); /* Recursively call "UTIL_prepareFileList" with the new path. */
|
|
if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; }
|
|
}
|
|
else if ((cFile.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_ARCHIVE) || (cFile.dwFileAttributes & FILE_ATTRIBUTE_COMPRESSED)) {
|
|
if (*bufStart + *pos + pathLength >= *bufEnd) {
|
|
ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE;
|
|
*bufStart = (char*)UTIL_realloc(*bufStart, newListSize);
|
|
*bufEnd = *bufStart + newListSize;
|
|
if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; }
|
|
}
|
|
if (*bufStart + *pos + pathLength < *bufEnd) {
|
|
strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos));
|
|
*pos += pathLength + 1;
|
|
nbFiles++;
|
|
}
|
|
}
|
|
free(path);
|
|
} while (FindNextFile(hFile, &cFile));
|
|
|
|
FindClose(hFile);
|
|
return nbFiles;
|
|
}
|
|
|
|
#elif (defined(__APPLE__) && defined(__MACH__)) || \
|
|
((defined(__unix__) || defined(__unix) || defined(__midipix__)) && defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200112L)) /* snprintf, opendir */
|
|
# define UTIL_HAS_CREATEFILELIST
|
|
# include <dirent.h> /* opendir, readdir */
|
|
|
|
UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd)
|
|
{
|
|
DIR *dir;
|
|
struct dirent *entry;
|
|
char* path;
|
|
int dirLength, fnameLength, pathLength, nbFiles = 0;
|
|
|
|
if (!(dir = opendir(dirName))) {
|
|
fprintf(stderr, "Cannot open directory '%s': %s\n", dirName, strerror(errno));
|
|
return 0;
|
|
}
|
|
|
|
dirLength = (int)strlen(dirName);
|
|
errno = 0;
|
|
while ((entry = readdir(dir)) != NULL) {
|
|
if (strcmp (entry->d_name, "..") == 0 ||
|
|
strcmp (entry->d_name, ".") == 0) continue;
|
|
fnameLength = (int)strlen(entry->d_name);
|
|
path = (char*) malloc(dirLength + fnameLength + 2);
|
|
if (!path) { closedir(dir); return 0; }
|
|
memcpy(path, dirName, dirLength);
|
|
path[dirLength] = '/';
|
|
memcpy(path+dirLength+1, entry->d_name, fnameLength);
|
|
pathLength = dirLength+1+fnameLength;
|
|
path[pathLength] = 0;
|
|
|
|
if (UTIL_isDirectory(path)) {
|
|
nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd); /* Recursively call "UTIL_prepareFileList" with the new path. */
|
|
if (*bufStart == NULL) { free(path); closedir(dir); return 0; }
|
|
} else {
|
|
if (*bufStart + *pos + pathLength >= *bufEnd) {
|
|
ptrdiff_t newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE;
|
|
*bufStart = (char*)UTIL_realloc(*bufStart, newListSize);
|
|
*bufEnd = *bufStart + newListSize;
|
|
if (*bufStart == NULL) { free(path); closedir(dir); return 0; }
|
|
}
|
|
if (*bufStart + *pos + pathLength < *bufEnd) {
|
|
strncpy(*bufStart + *pos, path, *bufEnd - (*bufStart + *pos));
|
|
*pos += pathLength + 1;
|
|
nbFiles++;
|
|
}
|
|
}
|
|
free(path);
|
|
errno = 0; /* clear errno after UTIL_isDirectory, UTIL_prepareFileList */
|
|
}
|
|
|
|
if (errno != 0) {
|
|
fprintf(stderr, "readdir(%s) error: %s\n", dirName, strerror(errno));
|
|
free(*bufStart);
|
|
*bufStart = NULL;
|
|
}
|
|
closedir(dir);
|
|
return nbFiles;
|
|
}
|
|
|
|
#else
|
|
|
|
UTIL_STATIC int UTIL_prepareFileList(const char *dirName, char** bufStart, size_t* pos, char** bufEnd)
|
|
{
|
|
(void)bufStart; (void)bufEnd; (void)pos;
|
|
fprintf(stderr, "Directory %s ignored (zstd compiled without _WIN32 or _POSIX_C_SOURCE)\n", dirName);
|
|
return 0;
|
|
}
|
|
|
|
#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.
|
|
*/
|
|
UTIL_STATIC const char** UTIL_createFileList(const char **inputNames, unsigned inputNamesNb, char** allocatedBuffer, unsigned* allocatedNamesNb)
|
|
{
|
|
size_t pos;
|
|
unsigned i, nbFiles;
|
|
char *bufend, *buf;
|
|
const char** fileTable;
|
|
|
|
buf = (char*)malloc(LIST_SIZE_INCREASE);
|
|
if (!buf) return NULL;
|
|
bufend = buf + LIST_SIZE_INCREASE;
|
|
|
|
for (i=0, pos=0, nbFiles=0; i<inputNamesNb; i++) {
|
|
if (!UTIL_isDirectory(inputNames[i])) {
|
|
size_t len = strlen(inputNames[i]);
|
|
if (buf + pos + len >= bufend) {
|
|
ptrdiff_t newListSize = (bufend - buf) + LIST_SIZE_INCREASE;
|
|
buf = (char*)UTIL_realloc(buf, newListSize);
|
|
bufend = buf + newListSize;
|
|
if (!buf) return NULL;
|
|
}
|
|
if (buf + pos + len < bufend) {
|
|
strncpy(buf + pos, inputNames[i], bufend - (buf + pos));
|
|
pos += len + 1;
|
|
nbFiles++;
|
|
}
|
|
} else {
|
|
nbFiles += UTIL_prepareFileList(inputNames[i], &buf, &pos, &bufend);
|
|
if (buf == NULL) return NULL;
|
|
} }
|
|
|
|
if (nbFiles == 0) { free(buf); return NULL; }
|
|
|
|
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 */
|