Bei der Implementierung von String.EqualsHelper und String.CompareOrdinalHelper (.NET 2 & 4) scheint es mir, dass die Vergleiche davon ausgehen, dass die Int-Byte-Größe 2 und die Long-Byte-Größe 4 beträgt 8 in der .NET 32-Bit-Welt. Was vermisse ich? Gibt es hier einen Haken? Quellcode-Beispiel inEin Blick in die EqualsHelper-Methode im .NET Framework undhttp://www.netframeworkdevs.com/common-language-runtime/string-comparision-24141.shtml.

Reverse Engineered Source von Reflector (Framework 2):

<code>[ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
private static unsafe bool EqualsHelper(string strA, string strB)
{
    int length = strA.Length;
    if (length != strB.Length)
    {
        return false;
    }
    fixed (char* str = ((char*) strA))
    {
        char* chPtr = str;
        fixed (char* str2 = ((char*) strB))
        {
            char* chPtr2 = str2;
            char* chPtr3 = chPtr;
            char* chPtr4 = chPtr2;
            while (length >= 10)
            {
                if ((((*(((int*) chPtr3)) != *(((int*) chPtr4))) || (*(((int*) (chPtr3 + 2))) != *(((int*) (chPtr4 + 2))))) || ((*(((int*) (chPtr3 + 4))) != *(((int*) (chPtr4 + 4)))) || (*(((int*) (chPtr3 + 6))) != *(((int*) (chPtr4 + 6)))))) || (*(((int*) (chPtr3 + 8))) != *(((int*) (chPtr4 + 8)))))
                {
                    break;
                }
                chPtr3 += 10;
                chPtr4 += 10;
                length -= 10;
            }
            while (length > 0)
            {
                if (*(((int*) chPtr3)) != *(((int*) chPtr4)))
                {
                    break;
                }
                chPtr3 += 2;
                chPtr4 += 2;
                length -= 2;
            }
            return (length <= 0);
        }
    }
}

private static unsafe int CompareOrdinalHelper(string strA, string strB)
{
    int num = Math.Min(strA.Length, strB.Length);
    int num2 = -1;
    fixed (char* str = ((char*) strA))
    {
        char* chPtr = str;
        fixed (char* str2 = ((char*) strB))
        {
            char* chPtr2 = str2;
            char* chPtr3 = chPtr;
            char* chPtr4 = chPtr2;
            while (num >= 10)
            {
                if (*(((int*) chPtr3)) != *(((int*) chPtr4)))
                {
                    num2 = 0;
                    break;
                }
                if (*(((int*) (chPtr3 + 2))) != *(((int*) (chPtr4 + 2))))
                {
                    num2 = 2;
                    break;
                }
                if (*(((int*) (chPtr3 + 4))) != *(((int*) (chPtr4 + 4))))
                {
                    num2 = 4;
                    break;
                }
                if (*(((int*) (chPtr3 + 6))) != *(((int*) (chPtr4 + 6))))
                {
                    num2 = 6;
                    break;
                }
                if (*(((int*) (chPtr3 + 8))) != *(((int*) (chPtr4 + 8))))
                {
                    num2 = 8;
                    break;
                }
                chPtr3 += 10;
                chPtr4 += 10;
                num -= 10;
            }
            if (num2 == -1)
            {
                goto Label_0101;
            }
            chPtr3 += num2;
            chPtr4 += num2;
            int num3 = chPtr3[0] - chPtr4[0];
            if (num3 != 0)
            {
                return num3;
            }
            return (chPtr3[1] - chPtr4[1]);
        Label_00E7:
            if (*(((int*) chPtr3)) != *(((int*) chPtr4)))
            {
                goto Label_0105;
            }
            chPtr3 += 2;
            chPtr4 += 2;
            num -= 2;
        Label_0101:
            if (num > 0)
            {
                goto Label_00E7;
            }
        Label_0105:
            if (num > 0)
            {
                int num4 = chPtr3[0] - chPtr4[0];
                if (num4 != 0)
                {
                    return num4;
                }
                return (chPtr3[1] - chPtr4[1]);
            }
            return (strA.Length - strB.Length);
        }
    }
}
</code>