iTextSharp.text.pdf.TrueTypeFontUnicode.GetWidth C# (CSharp) Method

        public override int GetWidth(string text) {
            if (vertical)
                return text.Length * 1000;
            int total = 0;
            if (fontSpecific) {
                char[] cc = text.ToCharArray();
                int len = cc.Length;
                for (int k = 0; k < len; ++k) {
                    char c = cc[k];
                    if ((c & 0xff00) == 0 || (c & 0xff00) == 0xf000)
                        total += GetRawWidth(c & 0xff, null);
                }
            }
            else {
                int len = text.Length;
                for (int k = 0; k < len; ++k) {
                    if (Utilities.IsSurrogatePair(text, k)) {
                        total += GetRawWidth(Utilities.ConvertToUtf32(text, k), encoding);
                        ++k;
                    }
                    else
                        total += GetRawWidth(text[k], encoding);
                }
            }
            return total;
        }