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Fix: Avoid using stat to retrieve file modification times on Windows (#7731)

This commit is contained in:
Owen Rudge 2019-09-11 21:57:12 +01:00
parent f81cb0a90d
commit 165eae0e80
1 changed files with 19 additions and 3 deletions
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22
src/fios.cpp
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@ -300,13 +300,29 @@ bool FiosFileScanner::AddFile(const char *filename, size_t basepath_length, cons
FiosItem *fios = file_list.Append();
#ifdef _WIN32
struct _stat sb;
if (_tstat(OTTD2FS(filename), &sb) == 0) {
// Retrieve the file modified date using GetFileTime rather than stat to work around an obscure MSVC bug that affects Windows XP
HANDLE fh = CreateFile(OTTD2FS(filename), GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr, OPEN_EXISTING, 0, nullptr);
if (fh != INVALID_HANDLE_VALUE) {
FILETIME ft;
ULARGE_INTEGER ft_int64;
if (GetFileTime(fh, nullptr, nullptr, &ft) != 0) {
ft_int64.HighPart = ft.dwHighDateTime;
ft_int64.LowPart = ft.dwLowDateTime;
// Convert from hectonanoseconds since 01/01/1601 to seconds since 01/01/1970
fios->mtime = ft_int64.QuadPart / 10000000ULL - 11644473600ULL;
} else {
fios->mtime = 0;
}
CloseHandle(fh);
#else
struct stat sb;
if (stat(filename, &sb) == 0) {
#endif
fios->mtime = sb.st_mtime;
#endif
} else {
fios->mtime = 0;
}