private static bool CompareTimeZoneFile(string filePath, byte[] buffer, byte[] rawData)
{
try
{
// bufferSize == 1 used to avoid unnecessary buffer in FileStream
using (SafeFileHandle sfh = File.OpenHandle(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
{
long fileLength = RandomAccess.GetLength(sfh);
if (fileLength == rawData.Length)
{
int index = 0;
int count = rawData.Length;
while (count > 0)
{
int n = RandomAccess.Read(sfh, buffer.AsSpan(index, count), index);
if (n == 0)
{
ThrowHelper.ThrowEndOfFileException();
}
int end = index + n;
for (; index < end; index++)
{
if (buffer[index] != rawData[index])
{
return(false);
}
}
count -= n;
}
return(true);
}
}
}
catch (IOException) { }
catch (SecurityException) { }
catch (UnauthorizedAccessException) { }
return(false);
}
