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Diffstat (limited to '')
| -rw-r--r-- | src/zstd/programs/util.c | 938 |
1 files changed, 938 insertions, 0 deletions
diff --git a/src/zstd/programs/util.c b/src/zstd/programs/util.c new file mode 100644 index 000000000..ab1abd3b1 --- /dev/null +++ b/src/zstd/programs/util.c @@ -0,0 +1,938 @@ +/* + * Copyright (c) 2016-2020, 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. + */ + +#if defined (__cplusplus) +extern "C" { +#endif + + +/*-**************************************** +* Dependencies +******************************************/ +#include "util.h" /* note : ensure that platform.h is included first ! */ +#include <stdlib.h> /* malloc, realloc, free */ +#include <stdio.h> /* fprintf */ +#include <time.h> /* clock_t, clock, CLOCKS_PER_SEC, nanosleep */ +#include <errno.h> +#include <assert.h> + +#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> /* utimensat */ +# endif +#endif + +#if defined(_MSC_VER) || defined(__MINGW32__) || defined (__MSVCRT__) +#include <direct.h> /* needed for _mkdir in windows */ +#endif + +#if defined(__linux__) || (PLATFORM_POSIX_VERSION >= 200112L) /* opendir, readdir require POSIX.1-2001 */ +# include <dirent.h> /* opendir, readdir */ +# include <string.h> /* strerror, memcpy */ +#endif /* #ifdef _WIN32 */ + + +/*-**************************************** +* Internal Macros +******************************************/ + +/* CONTROL is almost like an assert(), but is never disabled. + * It's designed for failures that may happen rarely, + * but we don't want to maintain a specific error code path for them, + * such as a malloc() returning NULL for example. + * Since it's always active, this macro can trigger side effects. + */ +#define CONTROL(c) { \ + if (!(c)) { \ + UTIL_DISPLAYLEVEL(1, "Error : %s, %i : %s", \ + __FILE__, __LINE__, #c); \ + exit(1); \ +} } + +/* console log */ +#define UTIL_DISPLAY(...) fprintf(stderr, __VA_ARGS__) +#define UTIL_DISPLAYLEVEL(l, ...) { if (g_utilDisplayLevel>=l) { UTIL_DISPLAY(__VA_ARGS__); } } + +/* 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; +} + +#if defined(_MSC_VER) + #define chmod _chmod +#endif + + +/*-**************************************** +* Console log +******************************************/ +int g_utilDisplayLevel; + + +/*-************************************* +* Constants +***************************************/ +#define LIST_SIZE_INCREASE (8*1024) +#define MAX_FILE_OF_FILE_NAMES_SIZE (1<<20)*50 + + +/*-************************************* +* Functions +***************************************/ + +int UTIL_fileExist(const char* filename) +{ + stat_t statbuf; +#if defined(_MSC_VER) + int const stat_error = _stat64(filename, &statbuf); +#else + int const stat_error = stat(filename, &statbuf); +#endif + return !stat_error; +} + +int UTIL_isRegularFile(const char* infilename) +{ + stat_t statbuf; + return UTIL_getFileStat(infilename, &statbuf); /* Only need to know whether it is a regular file */ +} + +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; +} + +/* like chmod, but avoid changing permission of /dev/null */ +int UTIL_chmod(char const* filename, mode_t permissions) +{ + if (!strcmp(filename, "/dev/null")) return 0; /* pretend success, but don't change anything */ + return chmod(filename, permissions); +} + +int UTIL_setFileStat(const char *filename, stat_t *statbuf) +{ + int res = 0; + + if (!UTIL_isRegularFile(filename)) + return -1; + + /* set access and modification times */ + /* We check that st_mtime is a macro here in order to give us confidence + * that struct stat has a struct timespec st_mtim member. We need this + * check because there are some platforms that claim to be POSIX 2008 + * compliant but which do not have st_mtim... */ +#if (PLATFORM_POSIX_VERSION >= 200809L) && defined(st_mtime) + { + /* (atime, mtime) */ + struct timespec timebuf[2] = { {0, UTIME_NOW} }; + timebuf[1] = statbuf->st_mtim; + res += utimensat(AT_FDCWD, filename, timebuf, 0); + } +#else + { + struct utimbuf timebuf; + timebuf.actime = time(NULL); + timebuf.modtime = statbuf->st_mtime; + res += utime(filename, &timebuf); + } +#endif + +#if !defined(_WIN32) + res += chown(filename, statbuf->st_uid, statbuf->st_gid); /* Copy ownership */ +#endif + + res += UTIL_chmod(filename, statbuf->st_mode & 07777); /* Copy file permissions */ + + errno = 0; + return -res; /* number of errors is returned */ +} + +int UTIL_isDirectory(const char* infilename) +{ + stat_t statbuf; +#if defined(_MSC_VER) + int const r = _stat64(infilename, &statbuf); + if (!r && (statbuf.st_mode & _S_IFDIR)) return 1; +#else + int const r = stat(infilename, &statbuf); + if (!r && S_ISDIR(statbuf.st_mode)) return 1; +#endif + return 0; +} + +int UTIL_compareStr(const void *p1, const void *p2) { + return strcmp(* (char * const *) p1, * (char * const *) p2); +} + +int UTIL_isSameFile(const char* fName1, const char* fName2) +{ + assert(fName1 != NULL); assert(fName2 != NULL); +#if defined(_MSC_VER) || defined(_WIN32) + /* note : Visual does not support file identification by inode. + * inode does not work on Windows, even with a posix layer, like msys2. + * The following work-around is limited to detecting exact name repetition only, + * aka `filename` is considered different from `subdir/../filename` */ + return !strcmp(fName1, fName2); +#else + { stat_t file1Stat; + stat_t file2Stat; + return UTIL_getFileStat(fName1, &file1Stat) + && UTIL_getFileStat(fName2, &file2Stat) + && (file1Stat.st_dev == file2Stat.st_dev) + && (file1Stat.st_ino == file2Stat.st_ino); + } +#endif +} + +/* UTIL_isFIFO : distinguish named pipes */ +int UTIL_isFIFO(const char* infilename) +{ +/* macro guards, as defined in : https://linux.die.net/man/2/lstat */ +#if PLATFORM_POSIX_VERSION >= 200112L + stat_t statbuf; + int const r = UTIL_getFileStat(infilename, &statbuf); + if (!r && S_ISFIFO(statbuf.st_mode)) return 1; +#endif + (void)infilename; + return 0; +} + +int UTIL_isLink(const char* infilename) +{ +/* macro guards, as defined in : https://linux.die.net/man/2/lstat */ +#if PLATFORM_POSIX_VERSION >= 200112L + stat_t statbuf; + int const r = lstat(infilename, &statbuf); + if (!r && S_ISLNK(statbuf.st_mode)) return 1; +#endif + (void)infilename; + return 0; +} + +U64 UTIL_getFileSize(const char* infilename) +{ + if (!UTIL_isRegularFile(infilename)) return UTIL_FILESIZE_UNKNOWN; + { int r; +#if defined(_MSC_VER) + struct __stat64 statbuf; + r = _stat64(infilename, &statbuf); + if (r || !(statbuf.st_mode & S_IFREG)) return UTIL_FILESIZE_UNKNOWN; +#elif defined(__MINGW32__) && defined (__MSVCRT__) + struct _stati64 statbuf; + r = _stati64(infilename, &statbuf); + if (r || !(statbuf.st_mode & S_IFREG)) return UTIL_FILESIZE_UNKNOWN; +#else + struct stat statbuf; + r = stat(infilename, &statbuf); + if (r || !S_ISREG(statbuf.st_mode)) return UTIL_FILESIZE_UNKNOWN; +#endif + return (U64)statbuf.st_size; + } +} + + +U64 UTIL_getTotalFileSize(const char* const * fileNamesTable, unsigned nbFiles) +{ + U64 total = 0; + unsigned n; + for (n=0; n<nbFiles; n++) { + U64 const size = UTIL_getFileSize(fileNamesTable[n]); + if (size == UTIL_FILESIZE_UNKNOWN) return UTIL_FILESIZE_UNKNOWN; + total += size; + } + return total; +} + + +/* condition : @file must be valid, and not have reached its end. + * @return : length of line written into @buf, ended with `\0` instead of '\n', + * or 0, if there is no new line */ +static size_t readLineFromFile(char* buf, size_t len, FILE* file) +{ + assert(!feof(file)); + /* Work around Cygwin problem when len == 1 it returns NULL. */ + if (len <= 1) return 0; + CONTROL( fgets(buf, (int) len, file) ); + { size_t linelen = strlen(buf); + if (strlen(buf)==0) return 0; + if (buf[linelen-1] == '\n') linelen--; + buf[linelen] = '\0'; + return linelen+1; + } +} + +/* Conditions : + * size of @inputFileName file must be < @dstCapacity + * @dst must be initialized + * @return : nb of lines + * or -1 if there's an error + */ +static int +readLinesFromFile(void* dst, size_t dstCapacity, + const char* inputFileName) +{ + int nbFiles = 0; + size_t pos = 0; + char* const buf = (char*)dst; + FILE* const inputFile = fopen(inputFileName, "r"); + + assert(dst != NULL); + + if(!inputFile) { + if (g_utilDisplayLevel >= 1) perror("zstd:util:readLinesFromFile"); + return -1; + } + + while ( !feof(inputFile) ) { + size_t const lineLength = readLineFromFile(buf+pos, dstCapacity-pos, inputFile); + if (lineLength == 0) break; + assert(pos + lineLength < dstCapacity); + pos += lineLength; + ++nbFiles; + } + + CONTROL( fclose(inputFile) == 0 ); + + return nbFiles; +} + +/*Note: buf is not freed in case function successfully created table because filesTable->fileNames[0] = buf*/ +FileNamesTable* +UTIL_createFileNamesTable_fromFileName(const char* inputFileName) +{ + size_t nbFiles = 0; + char* buf; + size_t bufSize; + size_t pos = 0; + + if (!UTIL_fileExist(inputFileName) || !UTIL_isRegularFile(inputFileName)) + return NULL; + + { U64 const inputFileSize = UTIL_getFileSize(inputFileName); + if(inputFileSize > MAX_FILE_OF_FILE_NAMES_SIZE) + return NULL; + bufSize = (size_t)(inputFileSize + 1); /* (+1) to add '\0' at the end of last filename */ + } + + buf = (char*) malloc(bufSize); + CONTROL( buf != NULL ); + + { int const ret_nbFiles = readLinesFromFile(buf, bufSize, inputFileName); + + if (ret_nbFiles <= 0) { + free(buf); + return NULL; + } + nbFiles = (size_t)ret_nbFiles; + } + + { const char** filenamesTable = (const char**) malloc(nbFiles * sizeof(*filenamesTable)); + CONTROL(filenamesTable != NULL); + + { size_t fnb; + for (fnb = 0, pos = 0; fnb < nbFiles; fnb++) { + filenamesTable[fnb] = buf+pos; + pos += strlen(buf+pos)+1; /* +1 for the finishing `\0` */ + } } + assert(pos <= bufSize); + + return UTIL_assembleFileNamesTable(filenamesTable, nbFiles, buf); + } +} + +static FileNamesTable* +UTIL_assembleFileNamesTable2(const char** filenames, size_t tableSize, size_t tableCapacity, char* buf) +{ + FileNamesTable* const table = (FileNamesTable*) malloc(sizeof(*table)); + CONTROL(table != NULL); + table->fileNames = filenames; + table->buf = buf; + table->tableSize = tableSize; + table->tableCapacity = tableCapacity; + return table; +} + +FileNamesTable* +UTIL_assembleFileNamesTable(const char** filenames, size_t tableSize, char* buf) +{ + return UTIL_assembleFileNamesTable2(filenames, tableSize, tableSize, buf); +} + +void UTIL_freeFileNamesTable(FileNamesTable* table) +{ + if (table==NULL) return; + free((void*)table->fileNames); + free(table->buf); + free(table); +} + +FileNamesTable* UTIL_allocateFileNamesTable(size_t tableSize) +{ + const char** const fnTable = (const char**)malloc(tableSize * sizeof(*fnTable)); + FileNamesTable* fnt; + if (fnTable==NULL) return NULL; + fnt = UTIL_assembleFileNamesTable(fnTable, tableSize, NULL); + fnt->tableSize = 0; /* the table is empty */ + return fnt; +} + +void UTIL_refFilename(FileNamesTable* fnt, const char* filename) +{ + assert(fnt->tableSize < fnt->tableCapacity); + fnt->fileNames[fnt->tableSize] = filename; + fnt->tableSize++; +} + +static size_t getTotalTableSize(FileNamesTable* table) +{ + size_t fnb = 0, totalSize = 0; + for(fnb = 0 ; fnb < table->tableSize && table->fileNames[fnb] ; ++fnb) { + totalSize += strlen(table->fileNames[fnb]) + 1; /* +1 to add '\0' at the end of each fileName */ + } + return totalSize; +} + +FileNamesTable* +UTIL_mergeFileNamesTable(FileNamesTable* table1, FileNamesTable* table2) +{ + unsigned newTableIdx = 0; + size_t pos = 0; + size_t newTotalTableSize; + char* buf; + + FileNamesTable* const newTable = UTIL_assembleFileNamesTable(NULL, 0, NULL); + CONTROL( newTable != NULL ); + + newTotalTableSize = getTotalTableSize(table1) + getTotalTableSize(table2); + + buf = (char*) calloc(newTotalTableSize, sizeof(*buf)); + CONTROL ( buf != NULL ); + + newTable->buf = buf; + newTable->tableSize = table1->tableSize + table2->tableSize; + newTable->fileNames = (const char **) calloc(newTable->tableSize, sizeof(*(newTable->fileNames))); + CONTROL ( newTable->fileNames != NULL ); + + { unsigned idx1; + for( idx1=0 ; (idx1 < table1->tableSize) && table1->fileNames[idx1] && (pos < newTotalTableSize); ++idx1, ++newTableIdx) { + size_t const curLen = strlen(table1->fileNames[idx1]); + memcpy(buf+pos, table1->fileNames[idx1], curLen); + assert(newTableIdx <= newTable->tableSize); + newTable->fileNames[newTableIdx] = buf+pos; + pos += curLen+1; + } } + + { unsigned idx2; + for( idx2=0 ; (idx2 < table2->tableSize) && table2->fileNames[idx2] && (pos < newTotalTableSize) ; ++idx2, ++newTableIdx) { + size_t const curLen = strlen(table2->fileNames[idx2]); + memcpy(buf+pos, table2->fileNames[idx2], curLen); + assert(newTableIdx <= newTable->tableSize); + newTable->fileNames[newTableIdx] = buf+pos; + pos += curLen+1; + } } + assert(pos <= newTotalTableSize); + newTable->tableSize = newTableIdx; + + UTIL_freeFileNamesTable(table1); + UTIL_freeFileNamesTable(table2); + + return newTable; +} + +#ifdef _WIN32 +static int UTIL_prepareFileList(const char* dirName, + char** bufStart, size_t* pos, + char** bufEnd, int followLinks) +{ + char* path; + size_t dirLength, pathLength; + int 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) { + UTIL_DISPLAYLEVEL(1, "Cannot open directory '%s'\n", dirName); + return 0; + } + free(path); + + do { + size_t const fnameLength = 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; + /* Recursively call "UTIL_prepareFileList" with the new path. */ + nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd, followLinks); + 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 const newListSize = (*bufEnd - *bufStart) + LIST_SIZE_INCREASE; + *bufStart = (char*)UTIL_realloc(*bufStart, newListSize); + if (*bufStart == NULL) { free(path); FindClose(hFile); return 0; } + *bufEnd = *bufStart + newListSize; + } + if (*bufStart + *pos + pathLength < *bufEnd) { + memcpy(*bufStart + *pos, path, pathLength+1 /* include final \0 */); + *pos += pathLength + 1; + nbFiles++; + } } + free(path); + } while (FindNextFileA(hFile, &cFile)); + + FindClose(hFile); + return nbFiles; +} + +#elif defined(__linux__) || (PLATFORM_POSIX_VERSION >= 200112L) /* opendir, readdir require POSIX.1-2001 */ + +static int UTIL_prepareFileList(const char *dirName, + char** bufStart, size_t* pos, + char** bufEnd, int followLinks) +{ + DIR* dir; + struct dirent * entry; + size_t dirLength; + int nbFiles = 0; + + if (!(dir = opendir(dirName))) { + UTIL_DISPLAYLEVEL(1, "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 (!followLinks && UTIL_isLink(path)) { + UTIL_DISPLAYLEVEL(2, "Warning : %s is a symbolic link, ignoring\n", path); + free(path); + continue; + } + + if (UTIL_isDirectory(path)) { + nbFiles += UTIL_prepareFileList(path, bufStart, pos, bufEnd, followLinks); /* 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; + assert(newListSize >= 0); + *bufStart = (char*)UTIL_realloc(*bufStart, (size_t)newListSize); + *bufEnd = *bufStart + newListSize; + if (*bufStart == NULL) { free(path); closedir(dir); return 0; } + } + if (*bufStart + *pos + pathLength < *bufEnd) { + memcpy(*bufStart + *pos, path, pathLength + 1); /* with final \0 */ + *pos += pathLength + 1; + nbFiles++; + } } + free(path); + errno = 0; /* clear errno after UTIL_isDirectory, UTIL_prepareFileList */ + } + + if (errno != 0) { + UTIL_DISPLAYLEVEL(1, "readdir(%s) error: %s \n", dirName, strerror(errno)); + free(*bufStart); + *bufStart = NULL; + } + closedir(dir); + return nbFiles; +} + +#else + +static int UTIL_prepareFileList(const char *dirName, + char** bufStart, size_t* pos, + char** bufEnd, int followLinks) +{ + (void)bufStart; (void)bufEnd; (void)pos; (void)followLinks; + UTIL_DISPLAYLEVEL(1, "Directory %s ignored (compiled without _WIN32 or _POSIX_C_SOURCE) \n", dirName); + return 0; +} + +#endif /* #ifdef _WIN32 */ + +int UTIL_isCompressedFile(const char *inputName, const char *extensionList[]) +{ + const char* ext = UTIL_getFileExtension(inputName); + while(*extensionList!=NULL) + { + const int isCompressedExtension = strcmp(ext,*extensionList); + if(isCompressedExtension==0) + return 1; + ++extensionList; + } + return 0; +} + +/*Utility function to get file extension from file */ +const char* UTIL_getFileExtension(const char* infilename) +{ + const char* extension = strrchr(infilename, '.'); + if(!extension || extension==infilename) return ""; + return extension; +} + + +FileNamesTable* +UTIL_createExpandedFNT(const char** inputNames, size_t nbIfns, int followLinks) +{ + unsigned nbFiles; + char* buf = (char*)malloc(LIST_SIZE_INCREASE); + char* bufend = buf + LIST_SIZE_INCREASE; + + if (!buf) return NULL; + + { size_t ifnNb, pos; + for (ifnNb=0, pos=0, nbFiles=0; ifnNb<nbIfns; ifnNb++) { + if (!UTIL_isDirectory(inputNames[ifnNb])) { + size_t const len = strlen(inputNames[ifnNb]); + if (buf + pos + len >= bufend) { + ptrdiff_t newListSize = (bufend - buf) + LIST_SIZE_INCREASE; + assert(newListSize >= 0); + buf = (char*)UTIL_realloc(buf, (size_t)newListSize); + if (!buf) return NULL; + bufend = buf + newListSize; + } + if (buf + pos + len < bufend) { + memcpy(buf+pos, inputNames[ifnNb], len+1); /* including final \0 */ + pos += len + 1; + nbFiles++; + } + } else { + nbFiles += (unsigned)UTIL_prepareFileList(inputNames[ifnNb], &buf, &pos, &bufend, followLinks); + if (buf == NULL) return NULL; + } } } + + /* note : even if nbFiles==0, function returns a valid, though empty, FileNamesTable* object */ + + { size_t ifnNb, pos; + size_t const fntCapacity = nbFiles + 1; /* minimum 1, allows adding one reference, typically stdin */ + const char** const fileNamesTable = (const char**)malloc(fntCapacity * sizeof(*fileNamesTable)); + if (!fileNamesTable) { free(buf); return NULL; } + + for (ifnNb = 0, pos = 0; ifnNb < nbFiles; ifnNb++) { + fileNamesTable[ifnNb] = buf + pos; + if (buf + pos > bufend) { free(buf); free((void*)fileNamesTable); return NULL; } + pos += strlen(fileNamesTable[ifnNb]) + 1; + } + return UTIL_assembleFileNamesTable2(fileNamesTable, nbFiles, fntCapacity, buf); + } +} + + +void UTIL_expandFNT(FileNamesTable** fnt, int followLinks) +{ + FileNamesTable* const newFNT = UTIL_createExpandedFNT((*fnt)->fileNames, (*fnt)->tableSize, followLinks); + CONTROL(newFNT != NULL); + UTIL_freeFileNamesTable(*fnt); + *fnt = newFNT; +} + +FileNamesTable* UTIL_createFNT_fromROTable(const char** filenames, size_t nbFilenames) +{ + size_t const sizeof_FNTable = nbFilenames * sizeof(*filenames); + const char** const newFNTable = (const char**)malloc(sizeof_FNTable); + if (newFNTable==NULL) return NULL; + memcpy((void*)newFNTable, filenames, sizeof_FNTable); /* void* : mitigate a Visual compiler bug or limitation */ + return UTIL_assembleFileNamesTable(newFNTable, nbFilenames, NULL); +} + + +/*-**************************************** +* count the number of physical cores +******************************************/ + +#if defined(_WIN32) || defined(WIN32) + +#include <windows.h> + +typedef BOOL(WINAPI* LPFN_GLPI)(PSYSTEM_LOGICAL_PROCESSOR_INFORMATION, PDWORD); + +int UTIL_countPhysicalCores(void) +{ + static int numPhysicalCores = 0; + if (numPhysicalCores != 0) return numPhysicalCores; + + { LPFN_GLPI glpi; + BOOL done = FALSE; + PSYSTEM_LOGICAL_PROCESSOR_INFORMATION buffer = NULL; + PSYSTEM_LOGICAL_PROCESSOR_INFORMATION ptr = NULL; + DWORD returnLength = 0; + size_t byteOffset = 0; + +#if defined(_MSC_VER) +/* Visual Studio does not like the following cast */ +# pragma warning( disable : 4054 ) /* conversion from function ptr to data ptr */ +# pragma warning( disable : 4055 ) /* conversion from data ptr to function ptr */ +#endif + glpi = (LPFN_GLPI)(void*)GetProcAddress(GetModuleHandle(TEXT("kernel32")), + "GetLogicalProcessorInformation"); + + if (glpi == NULL) { + goto failed; + } + + while(!done) { + DWORD rc = glpi(buffer, &returnLength); + if (FALSE == rc) { + if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) { + if (buffer) + free(buffer); + buffer = (PSYSTEM_LOGICAL_PROCESSOR_INFORMATION)malloc(returnLength); + + if (buffer == NULL) { + perror("zstd"); + exit(1); + } + } else { + /* some other error */ + goto failed; + } + } else { + done = TRUE; + } } + + ptr = buffer; + + while (byteOffset + sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION) <= returnLength) { + + if (ptr->Relationship == RelationProcessorCore) { + numPhysicalCores++; + } + + ptr++; + byteOffset += sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION); + } + + free(buffer); + + return numPhysicalCores; + } + +failed: + /* try to fall back on GetSystemInfo */ + { SYSTEM_INFO sysinfo; + GetSystemInfo(&sysinfo); + numPhysicalCores = sysinfo.dwNumberOfProcessors; + if (numPhysicalCores == 0) numPhysicalCores = 1; /* just in case */ + } + return numPhysicalCores; +} + +#elif defined(__APPLE__) + +#include <sys/sysctl.h> + +/* Use apple-provided syscall + * see: man 3 sysctl */ +int UTIL_countPhysicalCores(void) +{ + static S32 numPhysicalCores = 0; /* apple specifies int32_t */ + if (numPhysicalCores != 0) return numPhysicalCores; + + { size_t size = sizeof(S32); + int const ret = sysctlbyname("hw.physicalcpu", &numPhysicalCores, &size, NULL, 0); + if (ret != 0) { + if (errno == ENOENT) { + /* entry not present, fall back on 1 */ + numPhysicalCores = 1; + } else { + perror("zstd: can't get number of physical cpus"); + exit(1); + } + } + + return numPhysicalCores; + } +} + +#elif defined(__linux__) + +/* parse /proc/cpuinfo + * siblings / cpu cores should give hyperthreading ratio + * otherwise fall back on sysconf */ +int UTIL_countPhysicalCores(void) +{ + static int numPhysicalCores = 0; + + if (numPhysicalCores != 0) return numPhysicalCores; + + numPhysicalCores = (int)sysconf(_SC_NPROCESSORS_ONLN); + if (numPhysicalCores == -1) { + /* value not queryable, fall back on 1 */ + return numPhysicalCores = 1; + } + + /* try to determine if there's hyperthreading */ + { FILE* const cpuinfo = fopen("/proc/cpuinfo", "r"); +#define BUF_SIZE 80 + char buff[BUF_SIZE]; + + int siblings = 0; + int cpu_cores = 0; + int ratio = 1; + + if (cpuinfo == NULL) { + /* fall back on the sysconf value */ + return numPhysicalCores; + } + + /* assume the cpu cores/siblings values will be constant across all + * present processors */ + while (!feof(cpuinfo)) { + if (fgets(buff, BUF_SIZE, cpuinfo) != NULL) { + if (strncmp(buff, "siblings", 8) == 0) { + const char* const sep = strchr(buff, ':'); + if (sep == NULL || *sep == '\0') { + /* formatting was broken? */ + goto failed; + } + + siblings = atoi(sep + 1); + } + if (strncmp(buff, "cpu cores", 9) == 0) { + const char* const sep = strchr(buff, ':'); + if (sep == NULL || *sep == '\0') { + /* formatting was broken? */ + goto failed; + } + + cpu_cores = atoi(sep + 1); + } + } else if (ferror(cpuinfo)) { + /* fall back on the sysconf value */ + goto failed; + } } + if (siblings && cpu_cores) { + ratio = siblings / cpu_cores; + } +failed: + fclose(cpuinfo); + return numPhysicalCores = numPhysicalCores / ratio; + } +} + +#elif defined(__FreeBSD__) + +#include <sys/param.h> +#include <sys/sysctl.h> + +/* Use physical core sysctl when available + * see: man 4 smp, man 3 sysctl */ +int UTIL_countPhysicalCores(void) +{ + static int numPhysicalCores = 0; /* freebsd sysctl is native int sized */ + if (numPhysicalCores != 0) return numPhysicalCores; + +#if __FreeBSD_version >= 1300008 + { size_t size = sizeof(numPhysicalCores); + int ret = sysctlbyname("kern.smp.cores", &numPhysicalCores, &size, NULL, 0); + if (ret == 0) return numPhysicalCores; + if (errno != ENOENT) { + perror("zstd: can't get number of physical cpus"); + exit(1); + } + /* sysctl not present, fall through to older sysconf method */ + } +#endif + + numPhysicalCores = (int)sysconf(_SC_NPROCESSORS_ONLN); + if (numPhysicalCores == -1) { + /* value not queryable, fall back on 1 */ + numPhysicalCores = 1; + } + return numPhysicalCores; +} + +#elif defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__CYGWIN__) + +/* Use POSIX sysconf + * see: man 3 sysconf */ +int UTIL_countPhysicalCores(void) +{ + static int numPhysicalCores = 0; + + if (numPhysicalCores != 0) return numPhysicalCores; + + numPhysicalCores = (int)sysconf(_SC_NPROCESSORS_ONLN); + if (numPhysicalCores == -1) { + /* value not queryable, fall back on 1 */ + return numPhysicalCores = 1; + } + return numPhysicalCores; +} + +#else + +int UTIL_countPhysicalCores(void) +{ + /* assume 1 */ + return 1; +} + +#endif + +#if defined (__cplusplus) +} +#endif |