public uint ComputeCheckSum(byte[] bytes, CSMethod eMethod)
{
uint uiSummerValue = 0;
bool StopReading = false;
dlgSummer dlgSummer;
switch (eMethod)
{
case CSMethod.CRC32:
dlgSummer = new dlgSummer(SummerCRC32Logic);
uiSummerValue = 0xffffffff;
break;
case CSMethod.Checksum:
dlgSummer = new dlgSummer(SummerCSLogic);
break;
default:
dlgSummer = new dlgSummer(SummerCSLogic);
break;
}
uiSummerValue = dlgSummer(bytes.Length, uiSummerValue, bytes);
if (eMethod == CSMethod.CRC32)
{
uiSummerValue = ~uiSummerValue;
}
return(uiSummerValue);
}
public uint ComputeCheckSum(FileInfo file, CSMethod eCsMethod)
{
uint uiSummerValue = 0;
bool StopReading = false;
dlgSummer dlgSummer;
switch (eCsMethod)
{
case CSMethod.CRC32:
dlgSummer = new dlgSummer(SummerCRC32Logic);
uiSummerValue = 0xffffffff;
break;
case CSMethod.Checksum:
dlgSummer = new dlgSummer(SummerCSLogic);
break;
default:
dlgSummer = new dlgSummer(SummerCSLogic);
break;
}
using (FileStream fs = new FileStream(file.FullName, FileMode.Open))
using (BinaryReader br = new BinaryReader(fs))
{
long TotalLength = Math.Min((long)BufferSize, fs.Length);
while (!StopReading)
{
byte[] by1FileChunk = new byte[TotalLength];
br.Read(by1FileChunk, 0, (int)TotalLength);
uiSummerValue = dlgSummer(TotalLength, uiSummerValue, by1FileChunk);
if (br.BaseStream.Position >= br.BaseStream.Length)
{
StopReading = true;
}
}
}
if (eCsMethod == CSMethod.CRC32)
{
uiSummerValue = ~uiSummerValue;
}
return(uiSummerValue);
}
