internal static int Find(this IList <byte> /*!*/ bytes, IList <byte> /*!*/ sub, int?start)
{
if (sub == null)
{
throw PythonOps.TypeError("expected byte or byte array, got NoneType");
}
else if (start > bytes.Count)
{
return(-1);
}
int iStart;
if (start != null)
{
iStart = PythonOps.FixSliceIndex(start.Value, bytes.Count);
}
else
{
iStart = 0;
}
return(bytes.IndexOf(sub, iStart));
}
private static int FixEnd(IList <byte> bytes, int?end)
{
int iEnd;
if (end != null)
{
iEnd = PythonOps.FixSliceIndex(end.Value, bytes.Count);
}
else
{
iEnd = bytes.Count;
}
return(iEnd);
}
internal static int IndexOfByte(this IList <byte> bytes, int item, int start, int stop)
{
start = PythonOps.FixSliceIndex(start, bytes.Count);
stop = PythonOps.FixSliceIndex(stop, bytes.Count);
for (int i = start; i < Math.Min(stop, bytes.Count); i++)
{
if (bytes[i] == item)
{
return(i);
}
}
return(-1);
}
internal static int IndexOfByte(this IList <byte> /*!*/ bytes, int item, int start, int stop)
{
start = PythonOps.FixSliceIndex(start, bytes.Count);
stop = PythonOps.FixSliceIndex(stop, bytes.Count);
for (int i = start; i < Math.Min(stop, bytes.Count); i++)
{
if (bytes[i] == item)
{
return(i);
}
}
throw PythonOps.ValueError("bytearray.index(item): item not in bytearray");
}
internal static int CountOf(this IList <byte> bytes, IList <byte> ssub, int start, int end)
{
if (ssub == null)
{
throw PythonOps.TypeError("expected bytes or byte array, got NoneType");
}
if (start > bytes.Count)
{
return(0);
}
start = PythonOps.FixSliceIndex(start, bytes.Count);
end = PythonOps.FixSliceIndex(end, bytes.Count);
if (ssub.Count == 0)
{
return(Math.Max((end - start) + 1, 0));
}
int count = 0;
while (true)
{
if (end <= start)
{
break;
}
int index = bytes.IndexOf(ssub, start, end - start);
if (index == -1)
{
break;
}
count++;
start = index + ssub.Count;
}
return(count);
}
private static int FixStart(IList <byte> bytes, int?start)
{
return(start != null?PythonOps.FixSliceIndex(start.Value, bytes.Count) : 0);
}