IndexOf() [3/16]

unsafe int System.Globalization.CompareInfo.IndexOf ( ReadOnlySpan< char > source, ReadOnlySpan< char > value, int * matchLengthPtr, CompareOptions options, bool fromBeginning )

inlineprivate

Definition at line 743 of file CompareInfo.cs.

    {
        *matchLengthPtr = 0;
        int num = 0;
        if ((options & ~(CompareOptions.IgnoreCase | CompareOptions.IgnoreNonSpace | CompareOptions.IgnoreSymbols | CompareOptions.IgnoreKanaType | CompareOptions.IgnoreWidth)) == 0)
        {
            if (!GlobalizationMode.Invariant)
            {
                if (value.IsEmpty)
                {
                    if (!fromBeginning)
                    {
                        return source.Length;
                    }
                    return 0;
                }
                return IndexOfCore(source, value, options, matchLengthPtr, fromBeginning);
            }
            num = (((options & CompareOptions.IgnoreCase) != 0) ? (fromBeginning ? Ordinal.IndexOfOrdinalIgnoreCase(source, value) : Ordinal.LastIndexOfOrdinalIgnoreCase(source, value)) : (fromBeginning ? source.IndexOf(value) : source.LastIndexOf(value)));
        }
        else
        {
            switch (options)
            {
            case CompareOptions.Ordinal:
                num = (fromBeginning ? source.IndexOf(value) : source.LastIndexOf(value));
                break;
            case CompareOptions.OrdinalIgnoreCase:
                num = (fromBeginning ? Ordinal.IndexOfOrdinalIgnoreCase(source, value) : Ordinal.LastIndexOfOrdinalIgnoreCase(source, value));
                break;
            default:
                ThrowHelper.ThrowArgumentException(ExceptionResource.Argument_InvalidFlag, ExceptionArgument.options);
                break;
            }
        }
        if (num >= 0)
        {
            *matchLengthPtr = value.Length;
        }
        return num;
    }

References System.Globalization.CompareInfo.IndexOfCore(), System.Globalization.Ordinal.IndexOfOrdinalIgnoreCase(), System.Globalization.GlobalizationMode.Invariant, System.Globalization.Ordinal.LastIndexOfOrdinalIgnoreCase(), System.options, System.source, System.ThrowHelper.ThrowArgumentException(), and System.value.