FILETIME GetModificationTime(const WCHAR *filePath)
{
FILETIME lastMod = { 0 };
ScopedHandle h(OpenReadOnly(filePath));
if (h != INVALID_HANDLE_VALUE)
GetFileTime(h, NULL, NULL, &lastMod);
return lastMod;
}
// buf must be at least toRead in size (note: it won't be zero-terminated)
bool ReadN(const WCHAR *filePath, char *buf, size_t toRead)
{
ScopedHandle h(OpenReadOnly(filePath));
if (h == INVALID_HANDLE_VALUE)
return false;
DWORD nRead;
BOOL ok = ReadFile(h, buf, (DWORD)toRead, &nRead, NULL);
return ok && nRead == toRead;
}
void IBMemStream::FlushTo(IBStream& out_stream)
{
OpenReadOnly("none");
long size = GetSize();
long ntransferred = 0, nbytes, bufsize = 512*1024;
boost::scoped_array<uchar> tempbuf(new uchar [bufsize]);
// Read from memstream and write to it
while (ntransferred < size) {
nbytes = Read(tempbuf.get(), bufsize);
if (nbytes == 0)
ThrowError("MemStream::FlushTo failed, unexpected internal error, nbytes==0");
out_stream.WriteExact(tempbuf.get(), nbytes);
ntransferred += nbytes;
}
}
// returns -1 on error (can't use INVALID_FILE_SIZE because it won't cast right)
int64 GetSize(const WCHAR *filePath)
{
CrashIf(!filePath);
if (!filePath) return -1;
ScopedHandle h(OpenReadOnly(filePath));
if (h == INVALID_HANDLE_VALUE)
return -1;
// Don't use GetFileAttributesEx to retrieve the file size, as
// that function doesn't interact well with symlinks, etc.
LARGE_INTEGER size;
BOOL ok = GetFileSizeEx(h, &size);
if (!ok)
return -1;
return size.QuadPart;
}
