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/*
* Copyright (C) 2021 Liquidaty and the zsv/lib contributors
* All rights reserved
*
* This file is part of zsv/lib, distributed under the license defined at
* https://opensource.org/licenses/MIT
*/
#include <unistd.h>
#include <zsv/utils/os.h>
#include <stdio.h>
#include <errno.h>
#ifdef WIN32
#include "win/fopen_longpath.c"
#include "win/remove_longpath.c"
#endif
/**
* zsv_fopen(): same as normal fopen(), except on Win it also works with long filenames
*/
#if defined(_WIN32) || defined(WIN32) || defined(WIN)
FILE *zsv_fopen(const char *fname, const char *mode) {
if (strlen(fname) >= MAX_PATH)
return zsv_fopen_longpath(fname, mode);
return fopen(fname, mode);
}
#endif
#ifndef _WIN32
void zsv_perror(const char *s) {
perror(s);
}
int zsv_replace_file(const char *src, const char *dst) {
int save_errno = 0;
if (rename(src, dst) == 0) {
return 0;
}
if (errno != EXDEV) {
return errno;
}
// Fallback: copy and remove
FILE *fp_in = zsv_fopen(src, "rb");
if (!fp_in)
return errno;
FILE *fp_out = zsv_fopen(dst, "wb");
if (!fp_out) {
save_errno = errno;
fclose(fp_in);
return save_errno;
}
char buffer[4096];
size_t bytes_read;
while ((bytes_read = fread(buffer, 1, sizeof(buffer), fp_in)) > 0) {
if (fwrite(buffer, 1, bytes_read, fp_out) != bytes_read) {
fclose(fp_out);
fclose(fp_in);
return EOF;
}
}
fclose(fp_out);
fclose(fp_in);
if (remove(src) != 0)
return errno;
return 0;
}
#else
#include <windows.h>
#include <strsafe.h>
static void strlcpy(register char *dst, register const char *src, size_t n) {
for (; *src != '\0' && n > 1; n--) {
*dst++ = *src++;
}
*dst = '\0';
}
static void change_slashes_to_backslashes(char *path) {
int i;
for (i = 0; path[i] != '\0'; i++) {
if (path[i] == '/') {
path[i] = '\\';
}
if ((path[i] == '\\') && (i > 0)) {
while (path[i + 1] == '\\' || path[i + 1] == '/') {
(void)memmove(path + i + 1, path + i + 2, strlen(path + i + 1));
}
}
}
}
void zsv_win_to_unicode(const void *path, wchar_t *wbuf, size_t wbuf_len) {
char buf[PATH_MAX], buf2[PATH_MAX];
strlcpy(buf, path, sizeof(buf));
change_slashes_to_backslashes(buf);
/* Convert to Unicode and back. If doubly-converted string does not
* match the original, something is fishy, reject. */
memset(wbuf, 0, wbuf_len * sizeof(wchar_t));
MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int)wbuf_len);
WideCharToMultiByte(CP_UTF8, 0, wbuf, (int)wbuf_len, buf2, sizeof(buf2), NULL, NULL);
if (strcmp(buf, buf2) != 0) {
wbuf[0] = L'\0';
}
}
#include <wchar.h>
int zsv_replace_file(const char *src, const char *dest) {
wchar_t wdest[PATH_MAX], wsrc[PATH_MAX];
zsv_win_to_unicode(dest, wdest, ARRAY_SIZE(wdest));
zsv_win_to_unicode(src, wsrc, ARRAY_SIZE(wsrc));
if (MoveFileExW(wsrc, wdest, MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING | MOVEFILE_WRITE_THROUGH)) // success
return 0;
if (GetLastError() == 2) // file not found, could be target. use simple rename
return _wrename(wsrc, wdest); // returns 0 on success
return 1; // fail
}
static void zsv_win_printLastError(void) {
DWORD dw = GetLastError();
LPVOID lpMsgBuf;
LPVOID lpDisplayBuf;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, dw,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&lpMsgBuf, 0, NULL);
// Display the error message and exit the process
lpDisplayBuf = (LPVOID)LocalAlloc(LMEM_ZEROINIT, (lstrlen((LPCTSTR)lpMsgBuf) + 40) * sizeof(TCHAR));
StringCchPrintf((LPTSTR)lpDisplayBuf, LocalSize(lpDisplayBuf) / sizeof(TCHAR), TEXT("%s\r\n"), lpMsgBuf);
fprintf(stderr, "%s\r\n", (LPCTSTR)lpDisplayBuf);
LocalFree(lpMsgBuf);
LocalFree(lpDisplayBuf);
}
void zsv_perror(const char *s) {
if (s && *s)
fwrite(s, 1, strlen(s), stderr);
zsv_win_printLastError();
}
#endif
unsigned int zsv_get_number_of_cores() {
long ncores = 1; // Default to 1 in case of failure
#ifdef _WIN32
// Implementation for Windows (when cross-compiled with mingw64)
SYSTEM_INFO sysinfo;
GetSystemInfo(&sysinfo);
ncores = sysinfo.dwNumberOfProcessors;
#elif defined(_SC_NPROCESSORS_ONLN)
// Implementation for Linux and macOS (uses POSIX standard sysconf)
// _SC_NPROCESSORS_ONLN gets the number of *online* processors.
ncores = sysconf(_SC_NPROCESSORS_ONLN);
#else
// Fallback for other POSIX-like systems that might not define the symbol
// or for unexpected compilation environments.
#error Undefined! _SC_NPROCESSORS_ONLN
xx ncores = 1;
#endif
// Ensure we return a positive value
return (unsigned int)(ncores > 0 ? ncores : 1);
}
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