Scan()

int System.Text.RegularExpressions.RegexBoyerMoore.Scan ( string text, int index, int beglimit, int endlimit )

inline

Definition at line 165 of file RegexBoyerMoore.cs.

    {
        int num;
        int num2;
        int num3;
        int num4;
        int num5;
        if (!RightToLeft)
        {
            num = Pattern.Length;
            num2 = Pattern.Length - 1;
            num3 = 0;
            num4 = index + num - 1;
            num5 = 1;
        }
        else
        {
            num = -Pattern.Length;
            num2 = 0;
            num3 = -num - 1;
            num4 = index + num;
            num5 = -1;
        }
        char c = Pattern[num2];
        while (num4 < endlimit && num4 >= beglimit)
        {
            char c2 = text[num4];
            if (CaseInsensitive)
            {
                c2 = _culture.TextInfo.ToLower(c2);
            }
            int num6;
            if (c2 != c)
            {
                int[] array;
                num6 = ((c2 < '\u0080') ? NegativeASCII[(uint)c2] : ((NegativeUnicode == null || (array = NegativeUnicode[(int)c2 >> 8]) == null) ? num : array[c2 & 0xFF]));
                num4 += num6;
                continue;
            }
            int num7 = num4;
            int num8 = num2;
            do
            {
                if (num8 == num3)
                {
                    if (!RightToLeft)
                    {
                        return num7;
                    }
                    return num7 + 1;
                }
                num8 -= num5;
                num7 -= num5;
                c2 = text[num7];
                if (CaseInsensitive)
                {
                    c2 = _culture.TextInfo.ToLower(c2);
                }
            }
            while (c2 == Pattern[num8]);
            num6 = Positive[num8];
            if ((c2 & 0xFF80) == 0)
            {
                num7 = num8 - num2 + NegativeASCII[(uint)c2];
            }
            else
            {
                int[] array;
                if (NegativeUnicode == null || (array = NegativeUnicode[(int)c2 >> 8]) == null)
                {
                    num4 += num6;
                    continue;
                }
                num7 = num8 - num2 + array[c2 & 0xFF];
            }
            if (RightToLeft ? (num7 < num6) : (num7 > num6))
            {
                num6 = num7;
            }
            num4 += num6;
        }
        return -1;
    }

References System.Text.RegularExpressions.RegexBoyerMoore._culture, System.Text.RegularExpressions.array, System.Text.RegularExpressions.RegexBoyerMoore.CaseInsensitive, System.index, System.Text.RegularExpressions.RegexBoyerMoore.NegativeASCII, System.Text.RegularExpressions.RegexBoyerMoore.NegativeUnicode, System.Text.RegularExpressions.RegexBoyerMoore.Pattern, System.Text.RegularExpressions.RegexBoyerMoore.Positive, System.Text.RegularExpressions.RegexBoyerMoore.RightToLeft, System.text, System.Globalization.CultureInfo.TextInfo, and System.Globalization.TextInfo.ToLower().

Referenced by System.Text.RegularExpressions.RegexInterpreter.FindFirstChar().