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zstd/programs/util.c
shixuantong de8d9e8914 Fix several locations with potential memory leak
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/*
* Copyright (c) Meta Platforms, Inc. and affiliates.
* 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.
*/
/*-****************************************
* 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(__FreeBSD__)
#include <sys/param.h> /* __FreeBSD_version */
#endif /* #ifdef __FreeBSD__ */
#if defined(_WIN32)
# include <sys/utime.h> /* utime */
# include <io.h> /* _chmod */
# define ZSTD_USE_UTIMENSAT 0
#else
# include <unistd.h> /* chown, stat */
# include <sys/stat.h> /* utimensat, st_mtime */
# if (PLATFORM_POSIX_VERSION >= 200809L && defined(st_mtime)) \
|| (defined(__FreeBSD__) && __FreeBSD_version >= 1100056)
# define ZSTD_USE_UTIMENSAT 1
# else
# define ZSTD_USE_UTIMENSAT 0
# endif
# if ZSTD_USE_UTIMENSAT
# include <fcntl.h> /* AT_FDCWD */
# else
# include <utime.h> /* utime */
# 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__); } }
static int g_traceDepth = 0;
int g_traceFileStat = 0;
#define UTIL_TRACE_CALL(...) \
{ \
if (g_traceFileStat) { \
UTIL_DISPLAY("Trace:FileStat: %*s> ", g_traceDepth, ""); \
UTIL_DISPLAY(__VA_ARGS__); \
UTIL_DISPLAY("\n"); \
++g_traceDepth; \
} \
}
#define UTIL_TRACE_RET(ret) \
{ \
if (g_traceFileStat) { \
--g_traceDepth; \
UTIL_DISPLAY("Trace:FileStat: %*s< %d\n", g_traceDepth, "", (ret)); \
} \
}
/* 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
#ifndef ZSTD_HAVE_FCHMOD
#if PLATFORM_POSIX_VERSION >= 199309L
#define ZSTD_HAVE_FCHMOD
#endif
#endif
#ifndef ZSTD_HAVE_FCHOWN
#if PLATFORM_POSIX_VERSION >= 200809L
#define ZSTD_HAVE_FCHOWN
#endif
#endif
/*-****************************************
* Console log
******************************************/
int g_utilDisplayLevel;
int UTIL_requireUserConfirmation(const char* prompt, const char* abortMsg,
const char* acceptableLetters, int hasStdinInput) {
int ch, result;
if (hasStdinInput) {
UTIL_DISPLAY("stdin is an input - not proceeding.\n");
return 1;
}
UTIL_DISPLAY("%s", prompt);
ch = getchar();
result = 0;
if (strchr(acceptableLetters, ch) == NULL) {
UTIL_DISPLAY("%s \n", abortMsg);
result = 1;
}
/* flush the rest */
while ((ch!=EOF) && (ch!='\n'))
ch = getchar();
return result;
}
/*-*************************************
* Constants
***************************************/
#define KB * (1 << 10)
#define LIST_SIZE_INCREASE (8 KB)
#define MAX_FILE_OF_FILE_NAMES_SIZE (1<<20)*50
/*-*************************************
* Functions
***************************************/
void UTIL_traceFileStat(void)
{
g_traceFileStat = 1;
}
int UTIL_fstat(const int fd, const char* filename, stat_t* statbuf)
{
int ret;
UTIL_TRACE_CALL("UTIL_stat(%d, %s)", fd, filename);
#if defined(_MSC_VER)
if (fd >= 0) {
ret = !_fstat64(fd, statbuf);
} else {
ret = !_stat64(filename, statbuf);
}
#elif defined(__MINGW32__) && defined (__MSVCRT__)
if (fd >= 0) {
ret = !_fstati64(fd, statbuf);
} else {
ret = !_stati64(filename, statbuf);
}
#else
if (fd >= 0) {
ret = !fstat(fd, statbuf);
} else {
ret = !stat(filename, statbuf);
}
#endif
UTIL_TRACE_RET(ret);
return ret;
}
int UTIL_stat(const char* filename, stat_t* statbuf)
{
return UTIL_fstat(-1, filename, statbuf);
}
int UTIL_isFdRegularFile(int fd)
{
stat_t statbuf;
int ret;
UTIL_TRACE_CALL("UTIL_isFdRegularFile(%d)", fd);
ret = fd >= 0 && UTIL_fstat(fd, "", &statbuf) && UTIL_isRegularFileStat(&statbuf);
UTIL_TRACE_RET(ret);
return ret;
}
int UTIL_isRegularFile(const char* infilename)
{
stat_t statbuf;
int ret;
UTIL_TRACE_CALL("UTIL_isRegularFile(%s)", infilename);
ret = UTIL_stat(infilename, &statbuf) && UTIL_isRegularFileStat(&statbuf);
UTIL_TRACE_RET(ret);
return ret;
}
int UTIL_isRegularFileStat(const stat_t* statbuf)
{
#if defined(_MSC_VER)
return (statbuf->st_mode & S_IFREG) != 0;
#else
return S_ISREG(statbuf->st_mode) != 0;
#endif
}
/* like chmod, but avoid changing permission of /dev/null */
int UTIL_chmod(char const* filename, const stat_t* statbuf, mode_t permissions)
{
return UTIL_fchmod(-1, filename, statbuf, permissions);
}
int UTIL_fchmod(const int fd, char const* filename, const stat_t* statbuf, mode_t permissions)
{
stat_t localStatBuf;
UTIL_TRACE_CALL("UTIL_chmod(%s, %#4o)", filename, (unsigned)permissions);
if (statbuf == NULL) {
if (!UTIL_fstat(fd, filename, &localStatBuf)) {
UTIL_TRACE_RET(0);
return 0;
}
statbuf = &localStatBuf;
}
if (!UTIL_isRegularFileStat(statbuf)) {
UTIL_TRACE_RET(0);
return 0; /* pretend success, but don't change anything */
}
#ifdef ZSTD_HAVE_FCHMOD
if (fd >= 0) {
int ret;
UTIL_TRACE_CALL("fchmod");
ret = fchmod(fd, permissions);
UTIL_TRACE_RET(ret);
UTIL_TRACE_RET(ret);
return ret;
} else
#endif
{
int ret;
UTIL_TRACE_CALL("chmod");
ret = chmod(filename, permissions);
UTIL_TRACE_RET(ret);
UTIL_TRACE_RET(ret);
return ret;
}
}
/* set access and modification times */
int UTIL_utime(const char* filename, const stat_t *statbuf)
{
int ret;
UTIL_TRACE_CALL("UTIL_utime(%s)", filename);
/* 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... */
/* FreeBSD has implemented POSIX 2008 for a long time but still only
* advertises support for POSIX 2001. They have a version macro that
* lets us safely gate them in.
* See https://docs.freebsd.org/en/books/porters-handbook/versions/.
*/
#if ZSTD_USE_UTIMENSAT
{
/* (atime, mtime) */
struct timespec timebuf[2] = { {0, UTIME_NOW} };
timebuf[1] = statbuf->st_mtim;
ret = utimensat(AT_FDCWD, filename, timebuf, 0);
}
#else
{
struct utimbuf timebuf;
timebuf.actime = time(NULL);
timebuf.modtime = statbuf->st_mtime;
ret = utime(filename, &timebuf);
}
#endif
errno = 0;
UTIL_TRACE_RET(ret);
return ret;
}
int UTIL_setFileStat(const char *filename, const stat_t *statbuf)
{
return UTIL_setFDStat(-1, filename, statbuf);
}
int UTIL_setFDStat(const int fd, const char *filename, const stat_t *statbuf)
{
int res = 0;
stat_t curStatBuf;
UTIL_TRACE_CALL("UTIL_setFileStat(%d, %s)", fd, filename);
if (!UTIL_fstat(fd, filename, &curStatBuf) || !UTIL_isRegularFileStat(&curStatBuf)) {
UTIL_TRACE_RET(-1);
return -1;
}
/* Mimic gzip's behavior:
*
* "Change the group first, then the permissions, then the owner.
* That way, the permissions will be correct on systems that allow
* users to give away files, without introducing a security hole.
* Security depends on permissions not containing the setuid or
* setgid bits." */
#if !defined(_WIN32)
#ifdef ZSTD_HAVE_FCHOWN
if (fd >= 0) {
res += fchown(fd, -1, statbuf->st_gid); /* Apply group ownership */
} else
#endif
{
res += chown(filename, -1, statbuf->st_gid); /* Apply group ownership */
}
#endif
res += UTIL_fchmod(fd, filename, &curStatBuf, statbuf->st_mode & 0777); /* Copy file permissions */
#if !defined(_WIN32)
#ifdef ZSTD_HAVE_FCHOWN
if (fd >= 0) {
res += fchown(fd, statbuf->st_uid, -1); /* Apply user ownership */
} else
#endif
{
res += chown(filename, statbuf->st_uid, -1); /* Apply user ownership */
}
#endif
errno = 0;
UTIL_TRACE_RET(-res);
return -res; /* number of errors is returned */
}
int UTIL_isDirectory(const char* infilename)
{
stat_t statbuf;
int ret;
UTIL_TRACE_CALL("UTIL_isDirectory(%s)", infilename);
ret = UTIL_stat(infilename, &statbuf) && UTIL_isDirectoryStat(&statbuf);
UTIL_TRACE_RET(ret);
return ret;
}
int UTIL_isDirectoryStat(const stat_t* statbuf)
{
int ret;
UTIL_TRACE_CALL("UTIL_isDirectoryStat()");
#if defined(_MSC_VER)
ret = (statbuf->st_mode & _S_IFDIR) != 0;
#else
ret = S_ISDIR(statbuf->st_mode) != 0;
#endif
UTIL_TRACE_RET(ret);
return ret;
}
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)
{
int ret;
assert(fName1 != NULL); assert(fName2 != NULL);
UTIL_TRACE_CALL("UTIL_isSameFile(%s, %s)", fName1, fName2);
#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` */
ret = !strcmp(fName1, fName2);
#else
{ stat_t file1Stat;
stat_t file2Stat;
ret = UTIL_stat(fName1, &file1Stat)
&& UTIL_stat(fName2, &file2Stat)
&& UTIL_isSameFileStat(fName1, fName2, &file1Stat, &file2Stat);
}
#endif
UTIL_TRACE_RET(ret);
return ret;
}
int UTIL_isSameFileStat(
const char* fName1, const char* fName2,
const stat_t* file1Stat, const stat_t* file2Stat)
{
int ret;
assert(fName1 != NULL); assert(fName2 != NULL);
UTIL_TRACE_CALL("UTIL_isSameFileStat(%s, %s)", fName1, fName2);
#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` */
(void)file1Stat;
(void)file2Stat;
ret = !strcmp(fName1, fName2);
#else
{
ret = (file1Stat->st_dev == file2Stat->st_dev)
&& (file1Stat->st_ino == file2Stat->st_ino);
}
#endif
UTIL_TRACE_RET(ret);
return ret;
}
/* UTIL_isFIFO : distinguish named pipes */
int UTIL_isFIFO(const char* infilename)
{
UTIL_TRACE_CALL("UTIL_isFIFO(%s)", infilename);
/* macro guards, as defined in : https://linux.die.net/man/2/lstat */
#if PLATFORM_POSIX_VERSION >= 200112L
{
stat_t statbuf;
if (UTIL_stat(infilename, &statbuf) && UTIL_isFIFOStat(&statbuf)) {
UTIL_TRACE_RET(1);
return 1;
}
}
#endif
(void)infilename;
UTIL_TRACE_RET(0);
return 0;
}
/* UTIL_isFIFO : distinguish named pipes */
int UTIL_isFIFOStat(const stat_t* statbuf)
{
/* macro guards, as defined in : https://linux.die.net/man/2/lstat */
#if PLATFORM_POSIX_VERSION >= 200112L
if (S_ISFIFO(statbuf->st_mode)) return 1;
#endif
(void)statbuf;
return 0;
}
/* process substitution */
int UTIL_isFileDescriptorPipe(const char* filename)
{
UTIL_TRACE_CALL("UTIL_isFileDescriptorPipe(%s)", filename);
/* Check if the filename is a /dev/fd/ path which indicates a file descriptor */
if (filename[0] == '/' && strncmp(filename, "/dev/fd/", 8) == 0) {
UTIL_TRACE_RET(1);
return 1;
}
/* Check for alternative process substitution formats on different systems */
if (filename[0] == '/' && strncmp(filename, "/proc/self/fd/", 14) == 0) {
UTIL_TRACE_RET(1);
return 1;
}
UTIL_TRACE_RET(0);
return 0; /* Not recognized as a file descriptor pipe */
}
/* UTIL_isBlockDevStat : distinguish named pipes */
int UTIL_isBlockDevStat(const stat_t* statbuf)
{
/* macro guards, as defined in : https://linux.die.net/man/2/lstat */
#if PLATFORM_POSIX_VERSION >= 200112L
if (S_ISBLK(statbuf->st_mode)) return 1;
#endif
(void)statbuf;
return 0;
}
int UTIL_isLink(const char* infilename)
{
UTIL_TRACE_CALL("UTIL_isLink(%s)", 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)) {
UTIL_TRACE_RET(1);
return 1;
}
}
#endif
(void)infilename;
UTIL_TRACE_RET(0);
return 0;
}
static int g_fakeStdinIsConsole = 0;
static int g_fakeStderrIsConsole = 0;
static int g_fakeStdoutIsConsole = 0;
int UTIL_isConsole(FILE* file)
{
int ret;
UTIL_TRACE_CALL("UTIL_isConsole(%d)", fileno(file));
if (file == stdin && g_fakeStdinIsConsole)
ret = 1;
else if (file == stderr && g_fakeStderrIsConsole)
ret = 1;
else if (file == stdout && g_fakeStdoutIsConsole)
ret = 1;
else
ret = IS_CONSOLE(file);
UTIL_TRACE_RET(ret);
return ret;
}
void UTIL_fakeStdinIsConsole(void)
{
g_fakeStdinIsConsole = 1;
}
void UTIL_fakeStdoutIsConsole(void)
{
g_fakeStdoutIsConsole = 1;
}
void UTIL_fakeStderrIsConsole(void)
{
g_fakeStderrIsConsole = 1;
}
U64 UTIL_getFileSize(const char* infilename)
{
stat_t statbuf;
UTIL_TRACE_CALL("UTIL_getFileSize(%s)", infilename);
if (!UTIL_stat(infilename, &statbuf)) {
UTIL_TRACE_RET(-1);
return UTIL_FILESIZE_UNKNOWN;
}
{
U64 const size = UTIL_getFileSizeStat(&statbuf);
UTIL_TRACE_RET((int)size);
return size;
}
}
U64 UTIL_getFileSizeStat(const stat_t* statbuf)
{
if (!UTIL_isRegularFileStat(statbuf)) return UTIL_FILESIZE_UNKNOWN;
#if defined(_MSC_VER)
if (!(statbuf->st_mode & S_IFREG)) return UTIL_FILESIZE_UNKNOWN;
#elif defined(__MINGW32__) && defined (__MSVCRT__)
if (!(statbuf->st_mode & S_IFREG)) return UTIL_FILESIZE_UNKNOWN;
#else
if (!S_ISREG(statbuf->st_mode)) return UTIL_FILESIZE_UNKNOWN;
#endif
return (U64)statbuf->st_size;
}
UTIL_HumanReadableSize_t UTIL_makeHumanReadableSize(U64 size)
{
UTIL_HumanReadableSize_t hrs;
if (g_utilDisplayLevel > 3) {
/* In verbose mode, do not scale sizes down, except in the case of
* values that exceed the integral precision of a double. */
if (size >= (1ull << 53)) {
hrs.value = (double)size / (1ull << 20);
hrs.suffix = " MiB";
/* At worst, a double representation of a maximal size will be
* accurate to better than tens of kilobytes. */
hrs.precision = 2;
} else {
hrs.value = (double)size;
hrs.suffix = " B";
hrs.precision = 0;
}
} else {
/* In regular mode, scale sizes down and use suffixes. */
if (size >= (1ull << 60)) {
hrs.value = (double)size / (1ull << 60);
hrs.suffix = " EiB";
} else if (size >= (1ull << 50)) {
hrs.value = (double)size / (1ull << 50);
hrs.suffix = " PiB";
} else if (size >= (1ull << 40)) {
hrs.value = (double)size / (1ull << 40);
hrs.suffix = " TiB";
} else if (size >= (1ull << 30)) {
hrs.value = (double)size / (1ull << 30);
hrs.suffix = " GiB";
} else if (size >= (1ull << 20)) {
hrs.value = (double)size / (1ull << 20);
hrs.suffix = " MiB";
} else if (size >= (1ull << 10)) {
hrs.value = (double)size / (1ull << 10);
hrs.suffix = " KiB";
} else {
hrs.value = (double)size;
hrs.suffix = " B";
}
if (hrs.value >= 100 || (U64)hrs.value == size) {
hrs.precision = 0;
} else if (hrs.value >= 10) {
hrs.precision = 1;
} else if (hrs.value > 1) {
hrs.precision = 2;
} else {
hrs.precision = 3;
}
}
return hrs;
}
U64 UTIL_getTotalFileSize(const char* const * fileNamesTable, unsigned nbFiles)
{
U64 total = 0;
unsigned n;
UTIL_TRACE_CALL("UTIL_getTotalFileSize(%u)", nbFiles);
for (n=0; n<nbFiles; n++) {
U64 const size = UTIL_getFileSize(fileNamesTable[n]);
if (size == UTIL_FILESIZE_UNKNOWN) {
UTIL_TRACE_RET(-1);
return UTIL_FILESIZE_UNKNOWN;
}
total += size;
}
UTIL_TRACE_RET((int)total);
return total;
}
/* Read the entire content of a file into a buffer with progressive resizing */
static char* UTIL_readFileContent(FILE* inFile, size_t* totalReadPtr)
{
size_t bufSize = 64 KB; /* Start with a reasonable buffer size */
size_t totalRead = 0;
size_t bytesRead = 0;
char* buf = (char*)malloc(bufSize);
if (buf == NULL) return NULL;
/* Read the file incrementally */
while ((bytesRead = fread(buf + totalRead, 1, bufSize - totalRead - 1, inFile)) > 0) {
totalRead += bytesRead;
/* If buffer is nearly full, expand it */
if (bufSize - totalRead < 1 KB) {
if (bufSize >= MAX_FILE_OF_FILE_NAMES_SIZE) {
/* Too large, abort */
free(buf);
return NULL;
}
{ size_t newBufSize = bufSize * 2;
if (newBufSize > MAX_FILE_OF_FILE_NAMES_SIZE)
newBufSize = MAX_FILE_OF_FILE_NAMES_SIZE;
{ char* newBuf = (char*)realloc(buf, newBufSize);
if (newBuf == NULL) {
free(buf);
return NULL;
}
buf = newBuf;
bufSize = newBufSize;
} } }
}
/* Add null terminator to the end */
buf[totalRead] = '\0';
*totalReadPtr = totalRead;
return buf;
}
/* Process a buffer containing multiple lines and count the number of lines */
static size_t UTIL_processLines(char* buffer, size_t bufferSize)
{
size_t lineCount = 0;
size_t i = 0;
/* Convert newlines to null terminators and count lines */
while (i < bufferSize) {
if (buffer[i] == '\n') {
buffer[i] = '\0'; /* Replace newlines with null terminators */
lineCount++;
}
i++;
}
/* Count the last line if it doesn't end with a newline */
if (bufferSize > 0 && (i == 0 || buffer[i-1] != '\0')) {
lineCount++;
}
return lineCount;
}
/* Create an array of pointers to the lines in a buffer */
static const char** UTIL_createLinePointers(char* buffer, size_t numLines, size_t bufferSize)
{
size_t lineIndex = 0;
size_t pos = 0;
void* const bufferPtrs = malloc(numLines * sizeof(const char**));
const char** const linePointers = (const char**)bufferPtrs;
if (bufferPtrs == NULL) return NULL;
while (lineIndex < numLines && pos < bufferSize) {
size_t len = 0;
linePointers[lineIndex++] = buffer+pos;
/* Find the next null terminator, being careful not to go past the buffer */
while ((pos + len < bufferSize) && buffer[pos + len] != '\0') {
len++;
}
/* Move past this string and its null terminator */
pos += len;
if (pos < bufferSize) pos++; /* Skip the null terminator if we're not at buffer end */
}
/* Verify we processed the expected number of lines */
if (lineIndex != numLines) {
/* Something went wrong - we didn't find as many lines as expected */
free(bufferPtrs);
return NULL;
}
return linePointers;
}
FileNamesTable*
UTIL_createFileNamesTable_fromFileList(const char* fileList)
{
stat_t statbuf;
char* buffer = NULL;
size_t numLines = 0;
size_t bufferSize = 0;
/* Check if the input is a valid file */
if (!UTIL_stat(fileList, &statbuf)) {
return NULL;
}
/* Check if the input is a supported type */
if (!UTIL_isRegularFileStat(&statbuf) &&
!UTIL_isFIFOStat(&statbuf) &&
!UTIL_isFileDescriptorPipe(fileList)) {
return NULL;
}
/* Open the input file */
{ FILE* const inFile = fopen(fileList, "rb");
if (inFile == NULL) return NULL;
/* Read the file content */
buffer = UTIL_readFileContent(inFile, &bufferSize);
fclose(inFile);
}
if (buffer == NULL) return NULL;
/* Process lines */
numLines = UTIL_processLines(buffer, bufferSize);
if (numLines == 0) {
free(buffer);
return NULL;
}
/* Create line pointers */
{ const char** linePointers = UTIL_createLinePointers(buffer, numLines, bufferSize);
if (linePointers == NULL) {
free(buffer);
return NULL;
}
/* Create the final table */
return UTIL_assembleFileNamesTable(linePointers, numLines, buffer);
}
}
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;
}
int UTIL_searchFileNamesTable(FileNamesTable* table, char const* name) {
size_t i;
for(i=0 ;i < table->tableSize; i++) {
if(!strcmp(table->fileNames[i], name)) {
return (int)i;
}
}
return -1;
}
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, 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);
free(path);
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);
if (*bufStart != NULL) {
*bufEnd = *bufStart + newListSize;
} else {
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;
}
static int pathnameHas2Dots(const char *pathname)
{
/* We need to figure out whether any ".." present in the path is a whole
* path token, which is the case if it is bordered on both sides by either
* the beginning/end of the path or by a directory separator.
*/
const char *needle = pathname;
while (1) {
needle = strstr(needle, "..");
if (needle == NULL) {
return 0;
}
if ((needle == pathname || needle[-1] == PATH_SEP)
&& (needle[2] == '\0' || needle[2] == PATH_SEP)) {
return 1;
}
/* increment so we search for the next match */
needle++;
};
return 0;
}
static int isFileNameValidForMirroredOutput(const char *filename)
{
return !pathnameHas2Dots(filename);
}
#define DIR_DEFAULT_MODE 0755
static mode_t getDirMode(const char *dirName)
{
stat_t st;
if (!UTIL_stat(dirName, &st)) {
UTIL_DISPLAY("zstd: failed to get DIR stats %s: %s\n", dirName, strerror(errno));
return DIR_DEFAULT_MODE;
}
if (!UTIL_isDirectoryStat(&st)) {
UTIL_DISPLAY("zstd: expected directory: %s\n", dirName);
return DIR_DEFAULT_MODE;
}
return st.st_mode;
}
static int makeDir(const char *dir, mode_t mode)
{
#if defined(_MSC_VER) || defined(__MINGW32__) || defined (__MSVCRT__)
int ret = _mkdir(dir);
(void) mode;
#else
int ret = mkdir(dir, mode);
#endif
if (ret != 0) {
if (errno == EEXIST)
return 0;
UTIL_DISPLAY("zstd: failed to create DIR %s: %s\n", dir, strerror(errno));
}
return ret;
}
/* this function requires a mutable input string */
static void convertPathnameToDirName(char *pathname)
{
size_t len = 0;
char* pos = NULL;
/* get dir name from pathname similar to 'dirname()' */
assert(pathname != NULL);
/* remove trailing '/' chars */
len = strlen(pathname);
assert(len > 0);
while (pathname[len] == PATH_SEP) {
pathname[len] = '\0';
len--;
}
if (len == 0) return;
/* if input is a single file, return '.' instead. i.e.
* "xyz/abc/file.txt" => "xyz/abc"
"./file.txt" => "."
"file.txt" => "."
*/
pos = strrchr(pathname, PATH_SEP);
if (pos == NULL) {
pathname[0] = '.';
pathname[1] = '\0';
} else {
*pos = '\0';
}
}
/* pathname must be valid */
static const char* trimLeadingRootChar(const char *pathname)
{
assert(pathname != NULL);
if (pathname[0] == PATH_SEP)
return pathname + 1;
return pathname;
}
/* pathname must be valid */
static const char* trimLeadingCurrentDirConst(const char *pathname)
{
assert(pathname != NULL);
if ((pathname[0] == '.') && (pathname[1] == PATH_SEP))
return pathname + 2;
return pathname;
}
static char*
trimLeadingCurrentDir(char *pathname)
{
/* 'union charunion' can do const-cast without compiler warning */
union charunion {
char *chr;
const char* cchr;
} ptr;
ptr.cchr = trimLeadingCurrentDirConst(pathname);
return ptr.chr;
}
/* remove leading './' or '/' chars here */
static const char * trimPath(const char *pathname)
{
return trimLeadingRootChar(
trimLeadingCurrentDirConst(pathname));
}
static char* mallocAndJoin2Dir(const char *dir1, const char *dir2)
{
assert(dir1 != NULL && dir2 != NULL);
{ const size_t dir1Size = strlen(dir1);
const size_t dir2Size = strlen(dir2);
char *outDirBuffer, *buffer;
outDirBuffer = (char *) malloc(dir1Size + dir2Size + 2);
CONTROL(outDirBuffer != NULL);
memcpy(outDirBuffer, dir1, dir1Size);
outDirBuffer[dir1Size] = '\0';
buffer = outDirBuffer + dir1Size;
if (dir1Size > 0 && *(buffer - 1) != PATH_SEP) {
*buffer = PATH_SEP;
buffer++;
}
memcpy(buffer, dir2, dir2Size);
buffer[dir2Size] = '\0';
return outDirBuffer;
}
}
/* this function will return NULL if input srcFileName is not valid name for mirrored output path */
char* UTIL_createMirroredDestDirName(const char* srcFileName, const char* outDirRootName)
{
char* pathname = NULL;
if (!isFileNameValidForMirroredOutput(srcFileName))
return NULL;
pathname = mallocAndJoin2Dir(outDirRootName, trimPath(srcFileName));
convertPathnameToDirName(pathname);
return pathname;
}
static int
mirrorSrcDir(char* srcDirName, const char* outDirName)
{
mode_t srcMode;
int status = 0;
char* newDir = mallocAndJoin2Dir(outDirName, trimPath(srcDirName));
if (!newDir)
return -ENOMEM;
srcMode = getDirMode(srcDirName);
status = makeDir(newDir, srcMode);
free(newDir);
return status;
}
static int
mirrorSrcDirRecursive(char* srcDirName, const char* outDirName)
{
int status = 0;
char* pp = trimLeadingCurrentDir(srcDirName);
char* sp = NULL;
while ((sp = strchr(pp, PATH_SEP)) != NULL) {
if (sp != pp) {
*sp = '\0';
status = mirrorSrcDir(srcDirName, outDirName);
if (status != 0)
return status;
*sp = PATH_SEP;
}
pp = sp + 1;
}
status = mirrorSrcDir(srcDirName, outDirName);
return status;
}
static void
makeMirroredDestDirsWithSameSrcDirMode(char** srcDirNames, unsigned nbFile, const char* outDirName)
{
unsigned int i = 0;
for (i = 0; i < nbFile; i++)
mirrorSrcDirRecursive(srcDirNames[i], outDirName);
}
static int
firstIsParentOrSameDirOfSecond(const char* firstDir, const char* secondDir)
{
size_t firstDirLen = strlen(firstDir),
secondDirLen = strlen(secondDir);
return firstDirLen <= secondDirLen &&
(secondDir[firstDirLen] == PATH_SEP || secondDir[firstDirLen] == '\0') &&
0 == strncmp(firstDir, secondDir, firstDirLen);
}
static int compareDir(const void* pathname1, const void* pathname2) {
/* sort it after remove the leading '/' or './'*/
const char* s1 = trimPath(*(char * const *) pathname1);
const char* s2 = trimPath(*(char * const *) pathname2);
return strcmp(s1, s2);
}
static void
makeUniqueMirroredDestDirs(char** srcDirNames, unsigned nbFile, const char* outDirName)
{
unsigned int i = 0, uniqueDirNr = 0;
char** uniqueDirNames = NULL;
if (nbFile == 0)
return;
uniqueDirNames = (char** ) malloc(nbFile * sizeof (char *));
CONTROL(uniqueDirNames != NULL);
/* if dirs is "a/b/c" and "a/b/c/d", we only need call:
* we just need "a/b/c/d" */
qsort((void *)srcDirNames, nbFile, sizeof(char*), compareDir);
uniqueDirNr = 1;
uniqueDirNames[uniqueDirNr - 1] = srcDirNames[0];
for (i = 1; i < nbFile; i++) {
char* prevDirName = srcDirNames[i - 1];
char* currDirName = srcDirNames[i];
/* note: we always compare trimmed path, i.e.:
* src dir of "./foo" and "/foo" will be both saved into:
* "outDirName/foo/" */
if (!firstIsParentOrSameDirOfSecond(trimPath(prevDirName),
trimPath(currDirName)))
uniqueDirNr++;
/* we need to maintain original src dir name instead of trimmed
* dir, so we can retrieve the original src dir's mode_t */
uniqueDirNames[uniqueDirNr - 1] = currDirName;
}
makeMirroredDestDirsWithSameSrcDirMode(uniqueDirNames, uniqueDirNr, outDirName);
free(uniqueDirNames);
}
static void
makeMirroredDestDirs(char** srcFileNames, unsigned nbFile, const char* outDirName)
{
unsigned int i = 0;
for (i = 0; i < nbFile; ++i)
convertPathnameToDirName(srcFileNames[i]);
makeUniqueMirroredDestDirs(srcFileNames, nbFile, outDirName);
}
void UTIL_mirrorSourceFilesDirectories(const char** inFileNames, unsigned int nbFile, const char* outDirName)
{
unsigned int i = 0, validFilenamesNr = 0;
char** srcFileNames = (char **) malloc(nbFile * sizeof (char *));
CONTROL(srcFileNames != NULL);
/* check input filenames is valid */
for (i = 0; i < nbFile; ++i) {
if (isFileNameValidForMirroredOutput(inFileNames[i])) {
char* fname = STRDUP(inFileNames[i]);
CONTROL(fname != NULL);
srcFileNames[validFilenamesNr++] = fname;
}
}
if (validFilenamesNr > 0) {
makeDir(outDirName, DIR_DEFAULT_MODE);
makeMirroredDestDirs(srcFileNames, validFilenamesNr, outDirName);
}
for (i = 0; i < validFilenamesNr; i++)
free(srcFileNames[i]);
free(srcFileNames);
}
FileNamesTable*
UTIL_createExpandedFNT(const char* const* 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 cores
******************************************/
#if defined(_WIN32) || defined(WIN32)
#include <windows.h>
typedef BOOL(WINAPI* LPFN_GLPI)(PSYSTEM_LOGICAL_PROCESSOR_INFORMATION, PDWORD);
DWORD CountSetBits(ULONG_PTR bitMask)
{
DWORD LSHIFT = sizeof(ULONG_PTR)*8 - 1;
DWORD bitSetCount = 0;
ULONG_PTR bitTest = (ULONG_PTR)1 << LSHIFT;
DWORD i;
for (i = 0; i <= LSHIFT; ++i)
{
bitSetCount += ((bitMask & bitTest)?1:0);
bitTest/=2;
}
return bitSetCount;
}
int UTIL_countCores(int logical)
{
static int numCores = 0;
if (numCores != 0) return numCores;
{ 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) {
if (logical)
numCores += CountSetBits(ptr->ProcessorMask);
else
numCores++;
}
ptr++;
byteOffset += sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION);
}
free(buffer);
return numCores;
}
failed:
/* try to fall back on GetSystemInfo */
{ SYSTEM_INFO sysinfo;
GetSystemInfo(&sysinfo);
numCores = sysinfo.dwNumberOfProcessors;
if (numCores == 0) numCores = 1; /* just in case */
}
return numCores;
}
#elif defined(__APPLE__)
#include <sys/sysctl.h>
/* Use apple-provided syscall
* see: man 3 sysctl */
int UTIL_countCores(int logical)
{
static S32 numCores = 0; /* apple specifies int32_t */
if (numCores != 0) return numCores;
{ size_t size = sizeof(S32);
int const ret = sysctlbyname(logical ? "hw.logicalcpu" : "hw.physicalcpu", &numCores, &size, NULL, 0);
if (ret != 0) {
if (errno == ENOENT) {
/* entry not present, fall back on 1 */
numCores = 1;
} else {
perror("zstd: can't get number of cpus");
exit(1);
}
}
return numCores;
}
}
#elif defined(__linux__)
/* parse /proc/cpuinfo
* siblings / cpu cores should give hyperthreading ratio
* otherwise fall back on sysconf */
int UTIL_countCores(int logical)
{
static int numCores = 0;
if (numCores != 0) return numCores;
numCores = (int)sysconf(_SC_NPROCESSORS_ONLN);
if (numCores == -1) {
/* value not queryable, fall back on 1 */
return numCores = 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 numCores;
}
/* 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 && siblings > cpu_cores) {
ratio = siblings / cpu_cores;
}
if (ratio && numCores > ratio && !logical) {
numCores = numCores / ratio;
}
failed:
fclose(cpuinfo);
return numCores;
}
}
#elif defined(__FreeBSD__)
#include <sys/sysctl.h>
/* Use physical core sysctl when available
* see: man 4 smp, man 3 sysctl */
int UTIL_countCores(int logical)
{
static int numCores = 0; /* freebsd sysctl is native int sized */
#if __FreeBSD_version >= 1300008
static int perCore = 1;
#endif
if (numCores != 0) return numCores;
#if __FreeBSD_version >= 1300008
{ size_t size = sizeof(numCores);
int ret = sysctlbyname("kern.smp.cores", &numCores, &size, NULL, 0);
if (ret == 0) {
if (logical) {
ret = sysctlbyname("kern.smp.threads_per_core", &perCore, &size, NULL, 0);
/* default to physical cores if logical cannot be read */
if (ret == 0)
numCores *= perCore;
}
return numCores;
}
if (errno != ENOENT) {
perror("zstd: can't get number of cpus");
exit(1);
}
/* sysctl not present, fall through to older sysconf method */
}
#else
/* suppress unused parameter warning */
(void) logical;
#endif
numCores = (int)sysconf(_SC_NPROCESSORS_ONLN);
if (numCores == -1) {
/* value not queryable, fall back on 1 */
numCores = 1;
}
return numCores;
}
#elif defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__CYGWIN__)
/* Use POSIX sysconf
* see: man 3 sysconf */
int UTIL_countCores(int logical)
{
static int numCores = 0;
/* suppress unused parameter warning */
(void)logical;
if (numCores != 0) return numCores;
numCores = (int)sysconf(_SC_NPROCESSORS_ONLN);
if (numCores == -1) {
/* value not queryable, fall back on 1 */
return numCores = 1;
}
return numCores;
}
#else
int UTIL_countCores(int logical)
{
/* suppress unused parameter warning */
(void)logical;
/* assume 1 */
return 1;
}
#endif
int UTIL_countPhysicalCores(void)
{
return UTIL_countCores(0);
}
int UTIL_countLogicalCores(void)
{
return UTIL_countCores(1);
}
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