Ctor() [2/9]

unsafe string System.String.Ctor ( char * ptr, int startIndex, int length )

inlineprivate

Definition at line 975 of file String.cs.

    {
        if (length < 0)
        {
            throw new ArgumentOutOfRangeException("length", SR.ArgumentOutOfRange_NegativeLength);
        }
        if (startIndex < 0)
        {
            throw new ArgumentOutOfRangeException("startIndex", SR.ArgumentOutOfRange_StartIndex);
        }
        char* ptr2 = ptr + startIndex;
        if (ptr2 < ptr)
        {
            throw new ArgumentOutOfRangeException("startIndex", SR.ArgumentOutOfRange_PartialWCHAR);
        }
        if (length == 0)
        {
            return Empty;
        }
        if (ptr == null)
        {
            throw new ArgumentOutOfRangeException("ptr", SR.ArgumentOutOfRange_PartialWCHAR);
        }
        string text = FastAllocateString(length);
        nuint elementCount = (uint)text.Length;
        Buffer.Memmove(ref text._firstChar, ref *ptr2, elementCount);
        return text;
    }

References System.SR.ArgumentOutOfRange_NegativeLength, System.SR.ArgumentOutOfRange_PartialWCHAR, System.SR.ArgumentOutOfRange_StartIndex, System.String.Empty, System.String.FastAllocateString(), System.length, System.Buffer.Memmove(), System.startIndex, and System.text.