public static int Copy <T>(MarshalArrayBase source, int sourceOffset, T[] destination, int destOffset, int count)
{
if (sourceOffset < 0 || destOffset < 0 || count < 0)
{
throw new ArgumentException("sourceOffset < 0 or destOffset < 0 or count < 0");
}
if (source.Length - sourceOffset < count)
{
count = source.Length - sourceOffset;
}
if (destination.Length - destOffset < count)
{
count = destination.Length - destOffset;
}
int srcIndex = sourceOffset;
int dstIndex = destOffset;
int srcEnd = sourceOffset + count;
while (srcIndex < srcEnd)
{
destination[dstIndex] = source.GetValue <T>(srcIndex);
++dstIndex;
++srcIndex;
}
return(count);
}
public static int LastIndexOf <T>(MarshalArrayBase source, T item, int beginIndex, int count)
{
if (beginIndex < 0 || count < 0)
{
throw new ArgumentException("beginIndex < 0 or count < 0");
}
if (beginIndex >= source.Length)
{
beginIndex = source.Length - 1;
}
if (beginIndex + 1 < count)
{
count = beginIndex + 1;
}
int end = beginIndex - count;
int i = beginIndex;
while (i > end)
{
if (source.GetValue <T>(i).Equals(item))
{
return(i);
}
--i;
}
return(-1);
}