internal static int ReverseFind(this IList <byte> bytes, IList <byte> sub, int start, int end)
{
if (!PythonOps.TryFixSubsequenceIndices(bytes.Count, ref start, ref end))
{
return(-1);
}
return(bytes.LastIndexOf(sub, end, end - start));
}
internal static bool EndsWith(this IList <byte> self, IList <byte> suffix, int start, int end)
{
int len = self.Count;
if (!PythonOps.TryFixSubsequenceIndices(len, ref start, ref end))
{
return(false);
}
if (end - start < suffix.Count)
{
return(false);
}
for (int i = suffix.Count - 1, j = end - 1; i >= 0; i--, j--)
{
if (suffix[i] != self[j])
{
return(false);
}
}
return(true);
}
internal static bool StartsWith(this IList <byte> self, IList <byte> prefix, int start, int end)
{
int len = self.Count;
if (!PythonOps.TryFixSubsequenceIndices(len, ref start, ref end))
{
return(false);
}
if (end - start < prefix.Count)
{
return(false);
}
for (int i = 0, j = start; i < prefix.Count; i++, j++)
{
if (prefix[i] != self[j])
{
return(false);
}
}
return(true);
}