iTextSharp.text.pdf.TrueTypeFontSubSet.CalculateChecksum C# (CSharp) Метод

        protected int CalculateChecksum(byte[] b)
        {
            int len = b.Length / 4;
            int v0 = 0;
            int v1 = 0;
            int v2 = 0;
            int v3 = 0;
            int ptr = 0;
            for (int k = 0; k < len; ++k) {
                v3 += (int)b[ptr++] & 0xff;
                v2 += (int)b[ptr++] & 0xff;
                v1 += (int)b[ptr++] & 0xff;
                v0 += (int)b[ptr++] & 0xff;
            }
            return v0 + (v1 << 8) + (v2 << 16) + (v3 << 24);
        }