// Token: 0x06000009 RID: 9 RVA: 0x000021CC File Offset: 0x000003CC
public static long ComputeNormalizedLength(Stream input, byte[] buffer = null)
{
long length = 0L;
if (buffer == null)
{
buffer = new byte[65536];
}
for (;;)
{
int bytesRead = input.Read(buffer, 0, buffer.Length);
if (bytesRead == 0)
{
break;
}
for (int i = 0; i < bytesRead; i++)
{
if (!MurmurHash2.IsWhitespaceCharacter(buffer[i]))
{
length += 1L;
}
}
}
return(length);
}
// Token: 0x06000005 RID: 5 RVA: 0x000020C0 File Offset: 0x000002C0
public static ulong ComputeHash(Stream input)
{
byte[] buffer = new byte[65536];
long position = input.Position;
long length = MurmurHash2.ComputeNormalizedLength(input, buffer);
input.Seek(position, SeekOrigin.Begin);
uint h = (uint)(1L ^ length);
uint i = 0u;
int shift = 0;
for (;;)
{
int bufferLength = input.Read(buffer, 0, buffer.Length);
if (bufferLength == 0)
{
break;
}
for (int j = 0; j < bufferLength; j++)
{
byte b = buffer[j];
if (!MurmurHash2.IsWhitespaceCharacter(b))
{
i |= (uint)((uint)b << shift);
shift += 8;
if (shift == 32)
{
i *= 1540483477u;
i ^= i >> 24;
i *= 1540483477u;
h *= 1540483477u;
h ^= i;
i = 0u;
shift = 0;
}
}
}
}
if (shift > 0)
{
h ^= i;
h *= 1540483477u;
}
h ^= h >> 13;
h *= 1540483477u;
return(h ^ h >> 15);
}
