LastIndexOf() [9/15]

int System.Globalization.CompareInfo.LastIndexOf ( string source, char value, int startIndex, int count, CompareOptions options )

inline

Definition at line 856 of file CompareInfo.cs.

    {
        if (source == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.source);
        }
        while ((uint)startIndex >= (uint)source.Length)
        {
            if (startIndex == -1 && source.Length == 0)
            {
                count = 0;
                break;
            }
            if (startIndex == source.Length)
            {
                startIndex--;
                if (count > 0)
                {
                    count--;
                }
                continue;
            }
            ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.startIndex, ExceptionResource.ArgumentOutOfRange_Index);
            break;
        }
        startIndex = startIndex - count + 1;
        if (!source.TryGetSpan(startIndex, count, out var slice))
        {
            ThrowHelper.ThrowCountArgumentOutOfRange_ArgumentOutOfRange_Count();
        }
        int num = LastIndexOf(slice, MemoryMarshal.CreateReadOnlySpan(ref value, 1), options);
        if (num >= 0)
        {
            num += startIndex;
        }
        return num;
    }

References System.count, System.Globalization.CompareInfo.LastIndexOf(), System.options, System.source, System.startIndex, System.ThrowHelper.ThrowArgumentNullException(), System.ThrowHelper.ThrowArgumentOutOfRangeException(), System.ThrowHelper.ThrowCountArgumentOutOfRange_ArgumentOutOfRange_Count(), and System.value.