namespace videosource
{
using System;
///
/// Some array utilities
///
internal class ByteArrayUtils
{
// Check if the array contains needle on specified position
public static bool Compare(byte[] array, byte[] needle, int startIndex)
{
int needleLen = needle.Length;
// compare
for (int i = 0, p = startIndex; i < needleLen; i++, p++)
{
if (array[p] != needle[i])
{
return false;
}
}
return true;
}
// Find subarray in array
public static int Find(byte[] array, byte[] needle, int startIndex, int count)
{
int needleLen = needle.Length;
int index;
while (count >= needleLen)
{
index = Array.IndexOf(array, needle[0], startIndex, count - needleLen + 1);
if (index == -1)
return -1;
int i, p;
// check for needle
for (i = 0, p = index; i < needleLen; i++, p++)
{
if (array[p] != needle[i])
{
break;
}
}
if (i == needleLen)
{
// found needle
return index;
}
count -= (index - startIndex + 1);
startIndex = index + 1;
}
return -1;
}
}
}