GetCharCount() [5/6]

unsafe override int System.Text.OSEncoding.GetCharCount ( byte[] bytes, int index, int count )

inline

Definition at line 139 of file OSEncoding.cs.

    {
        if (bytes == null)
        {
            throw new ArgumentNullException("bytes", System.SR.ArgumentNull_Array);
        }
        if (index < 0 || count < 0)
        {
            throw new ArgumentOutOfRangeException((index < 0) ? "index" : "count", System.SR.ArgumentOutOfRange_NeedNonNegNum);
        }
        if (bytes.Length - index < count)
        {
            throw new ArgumentOutOfRangeException("bytes", System.SR.ArgumentOutOfRange_IndexCountBuffer);
        }
        if (count == 0)
        {
            return 0;
        }
        fixed (byte* ptr = bytes)
        {
            return MultiByteToWideChar(_codePage, ptr + index, count, null, 0);
        }
    }

References System.Text.OSEncoding._codePage, System.SR.ArgumentNull_Array, System.SR.ArgumentOutOfRange_IndexCountBuffer, System.SR.ArgumentOutOfRange_NeedNonNegNum, System.bytes, System.count, System.index, and System.Text.OSEncoding.MultiByteToWideChar().