/
niceSOFT
/
lz4
Обзор
Документация
Войти
/
niceSOFT
/
lz4
Код
Задачи
Вики
Пакеты
0
Релизы
0
Аналитика
Безопасность
dev
programs/util.h
574 строки
18 KB
Yann Collet
removed year from header (#1605)
27 апр 2025, 21:55
Не верифицирован
27 апр 2025, 21:55
2719f42
Код
Авторство
О чём код?
/* util.h - utility functions Copyright (c) Yann Collet. All rights reserved. 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. */ #ifndef UTIL_H_MODULE #define UTIL_H_MODULE #if defined (__cplusplus) extern "C" { #endif /*-**************************************** * Dependencies ******************************************/ #include "platform.h" /* PLATFORM_POSIX_VERSION */ #include <stddef.h> /* size_t, ptrdiff_t */ #include <stdlib.h> /* malloc */ #include <string.h> /* strlen, strncpy */ #include <stdio.h> /* fprintf, fileno */ #include <assert.h> #include <sys/types.h> /* stat, utime */ #include <sys/stat.h> /* stat */ #if defined(_WIN32) # include <sys/utime.h> /* utime */ # include <io.h> /* _chmod */ #else # include <unistd.h> /* chown, stat */ # if PLATFORM_POSIX_VERSION < 200809L # include <utime.h> /* utime */ # else # include <fcntl.h> /* AT_FDCWD */ # include <sys/stat.h> /* for utimensat */ # endif #endif #include <time.h> /* time */ #include <limits.h> /* INT_MAX */ #include <errno.h> /*-************************************************************** * 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 /* ************************************************************ * 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 /*-**************************************** * Local host Core counting ******************************************/ int UTIL_countCores(void); /*-**************************************** * Sleep 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> # include <sys/resource.h> /* setpriority */ # include <time.h> /* clock_t, nanosleep, clock, CLOCKS_PER_SEC */ # if defined(PRIO_PROCESS) # define SET_REALTIME_PRIORITY setpriority(PRIO_PROCESS, 0, -20) # else # define SET_REALTIME_PRIORITY /* disabled */ # endif # define UTIL_sleep(s) sleep(s) # if (defined(__linux__) && (PLATFORM_POSIX_VERSION >= 199309L)) || (PLATFORM_POSIX_VERSION >= 200112L) /* nanosleep requires POSIX.1-2001 */ # 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_REALTIME_PRIORITY /* disabled */ # define UTIL_sleep(s) /* disabled */ # define UTIL_sleepMilli(milli) /* disabled */ #endif /*-**************************************** * stat() functions ******************************************/ #if defined(_MSC_VER) # define UTIL_TYPE_stat __stat64 # define UTIL_stat _stat64 # define UTIL_fstat _fstat64 # define UTIL_STAT_MODE_ISREG(st_mode) ((st_mode) & S_IFREG) #elif defined(__MINGW32__) && defined (__MSVCRT__) # define UTIL_TYPE_stat _stati64 # define UTIL_stat _stati64 # define UTIL_fstat _fstati64 # define UTIL_STAT_MODE_ISREG(st_mode) ((st_mode) & S_IFREG) #else # define UTIL_TYPE_stat stat # define UTIL_stat stat # define UTIL_fstat fstat # define UTIL_STAT_MODE_ISREG(st_mode) (S_ISREG(st_mode)) #endif /*-**************************************** * fileno() function ******************************************/ #if defined(_MSC_VER) # define UTIL_fileno _fileno #else # define UTIL_fileno fileno #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 /*-**************************************** * Allocation functions ******************************************/ /* * A modified version of realloc(). * Original block is always freed. */ UTIL_STATIC void* UTIL_realloc(void* prevPtr, size_t newSize) { if (newSize == 0) { free(prevPtr); return NULL; } /* newSize > 0 */ { void* const newptr = realloc(prevPtr, newSize); if (newptr) return newptr; } /* realloc failed */ free(prevPtr); return NULL; } /*-**************************************** * String functions ******************************************/ /* supports a==NULL or b==NULL */ UTIL_STATIC int UTIL_sameString(const char* a, const char* b) { assert(a != NULL || b != NULL); /* unsupported scenario */ if (a==NULL) return 0; if (b==NULL) return 0; return !strcmp(a,b); } /*-**************************************** * 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_isRegFile(const char* infilename); UTIL_STATIC int UTIL_isRegFD(int fd); UTIL_STATIC int UTIL_setFileStat(const char *filename, stat_t *statbuf) { int res = 0; if (!UTIL_isRegFile(filename)) return -1; { #if defined(_WIN32) || (PLATFORM_POSIX_VERSION < 200809L) struct utimbuf timebuf; timebuf.actime = time(NULL); timebuf.modtime = statbuf->st_mtime; res += utime(filename, &timebuf); /* set access and modification times */ #else struct timespec timebuf[2]; memset(timebuf, 0, sizeof(timebuf)); timebuf[0].tv_nsec = UTIME_NOW; timebuf[1].tv_sec = statbuf->st_mtime; res += utimensat(AT_FDCWD, filename, timebuf, 0); /* set access and modification times */ #endif } #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_getFDStat(int fd, stat_t *statbuf) { int r; #if defined(_MSC_VER) r = _fstat64(fd, statbuf); if (r || !(statbuf->st_mode & S_IFREG)) return 0; /* No good... */ #else r = fstat(fd, statbuf); if (r || !S_ISREG(statbuf->st_mode)) return 0; /* No good... */ #endif return 1; } 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 int UTIL_isRegFD(int fd) { stat_t statbuf; #ifdef _WIN32 /* Windows runtime library always open file descriptors 0, 1 and 2 in text mode, therefore we can't use them for binary I/O */ if(fd < 3) return 0; #endif return UTIL_getFDStat(fd, &statbuf); /* Only need to know whether it is a regular file */ } UTIL_STATIC int UTIL_isRegFile(const char* infilename) { stat_t statbuf; return UTIL_getFileStat(infilename, &statbuf); /* Only need to know whether it is a regular file */ } UTIL_STATIC int UTIL_isDirectory(const char* infilename) { stat_t statbuf; int r; #if defined(_MSC_VER) r = _stat64(infilename, &statbuf); if (r) return 0; return (statbuf.st_mode & S_IFDIR); #else r = stat(infilename, &statbuf); if (r) return 0; return (S_ISDIR(statbuf.st_mode)); #endif } UTIL_STATIC U64 UTIL_getOpenFileSize(FILE* file) { int r; int fd; struct UTIL_TYPE_stat statbuf; fd = UTIL_fileno(file); if (fd < 0) { perror("fileno"); exit(1); } r = UTIL_fstat(fd, &statbuf); if (r || !UTIL_STAT_MODE_ISREG(statbuf.st_mode)) return 0; /* No good... */ return (U64)statbuf.st_size; } UTIL_STATIC U64 UTIL_getFileSize(const char* infilename) { int r; struct UTIL_TYPE_stat statbuf; r = UTIL_stat(infilename, &statbuf); if (r || !UTIL_STAT_MODE_ISREG(statbuf.st_mode)) return 0; /* No good... */ 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; } #ifdef _WIN32 # define UTIL_HAS_CREATEFILELIST UTIL_STATIC int UTIL_prepareFileList(const char* dirName, char** bufStart, size_t* pos, char** bufEnd) { char* path; size_t dirLength, nbFiles = 0; WIN32_FIND_DATAA cFile; HANDLE hFile; dirLength = 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=FindFirstFileA(path, &cFile); if (hFile == INVALID_HANDLE_VALUE) { fprintf(stderr, "Cannot open directory '%s'\n", dirName); return 0; } free(path); do { size_t pathLength; int const 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 (FindNextFileA(hFile, &cFile)); FindClose(hFile); assert(nbFiles < INT_MAX); return (int)nbFiles; } #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 */ UTIL_STATIC int UTIL_prepareFileList(const char* dirName, char** bufStart, size_t* pos, char** bufEnd) { DIR* dir; struct dirent * entry; size_t dirLength; int nbFiles = 0; if (!(dir = opendir(dirName))) { fprintf(stderr, "Cannot open directory '%s': %s\n", dirName, strerror(errno)); return 0; } dirLength = strlen(dirName); errno = 0; while ((entry = readdir(dir)) != NULL) { char* path; size_t fnameLength, pathLength; if (strcmp (entry->d_name, "..") == 0 || strcmp (entry->d_name, ".") == 0) continue; fnameLength = 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) { size_t const newListSize = (size_t)(*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 (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* buf = (char*)malloc(LIST_SIZE_INCREASE); size_t bufSize = LIST_SIZE_INCREASE; const char** fileTable; if (!buf) return NULL; for (i=0, pos=0, nbFiles=0; i<inputNamesNb; i++) { if (!UTIL_isDirectory(inputNames[i])) { size_t const len = strlen(inputNames[i]) + 1; /* include nul char */ if (pos + len >= bufSize) { while (pos + len >= bufSize) bufSize += LIST_SIZE_INCREASE; buf = (char*)UTIL_realloc(buf, bufSize); if (!buf) return NULL; } assert(pos + len < bufSize); memcpy(buf + pos, inputNames[i], len); pos += len; nbFiles++; } else { char* bufend = buf + bufSize; nbFiles += (unsigned)UTIL_prepareFileList(inputNames[i], &buf, &pos, &bufend); if (buf == NULL) return NULL; assert(bufend > buf); bufSize = (size_t)(bufend - buf); } } if (nbFiles == 0) { free(buf); return NULL; } fileTable = (const char**)malloc(((size_t)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 (pos > bufSize) { free(buf); free((void*)fileTable); return NULL; } /* can this happen ? */ *allocatedBuffer = buf; *allocatedNamesNb = nbFiles; return fileTable; } UTIL_STATIC void UTIL_freeFileList(const char** filenameTable, char* allocatedBuffer) { free(allocatedBuffer); free((void*)filenameTable); } #if defined (__cplusplus) } #endif #endif /* UTIL_H_MODULE */