c# - 将字符串转换为 GSM

Question

使用它作为我应该能够期望段看起来像 https://twiliodeved.github.io/message-segment-calculator/的参考

这是我输入的字符串

Hello there stackoverflow this is a string that should be segmented into 2 segments for some reason my code only says 1 segment of 17 segments which is not right at all

我在这里尝试了两种不同的形式，第一种是

public static string ToGSM7(string text)
        {
            string gsm_table = "";

            gsm_table += "@£$¥èéùìòÇ`Øø`Åå";

            gsm_table += "Δ_ΦΓΛΩΠΨΣΘΞ`ÆæßÉ";

            gsm_table += " !\"#¤%&'()*=,-./";

            gsm_table += "0123456789:;<=>?";

            gsm_table += "¡ABCDEFGHIJKLMNO";

            gsm_table += "PQRSTUVWXYZÄÖÑÜ`";

            gsm_table += "¿abcdefghijklmno";

            gsm_table += "pqrstuvwxyzäöñüà";

            string extendable_table = "";

            extendable_table += "````````````````";

            extendable_table += "````^```````````";

            extendable_table += "````````{}`````\\";

            extendable_table += "````````````[~]`";

            extendable_table += "|```````````````";

            extendable_table += "````````````````";

            extendable_table += "`````€``````````";

            extendable_table += "````````````````";

            string gsm_output = "";

            foreach (char c_text in text)
            {
                int int_gsm_table = extendable_table.IndexOf(text);

                if (int_gsm_table != -1)
                {
                    gsm_output += int_gsm_table.ToString("X2");
                    continue;
                }

                int int_extended_table = extendable_table.IndexOf(text);

                if (int_extended_table != -1)
                {
                    gsm_output += (27).ToString("X2");
                    gsm_output += int_extended_table.ToString("X2");
                }
            }

            return gsm_output;
        }
        
        
        public static string GetSegments(string text)
        {
            int segments = 0;

            if (ContainsEmoji(text))
            {
                string encoded_string = ToUCS2(text);
                segments = (int)(encoded_string.Length / 67) + 1;
            }
            else
            {
                string encoded_string = ToGSM7(text);
                segments = (int)(encoded_string.Length / 160) + 1;
            }

            return segments.ToString();
        }
        

运行此命令后，无论我在字符串中放入多少文本，出于某种原因，我总是会返回 1 段

我尝试的第二种方法是（使用相同的 GetSegments 方法）

// Basic Character Set
        private const string BASIC_SET =
                "@£$¥èéùìòÇ\nØø\rÅåΔ_ΦΓΛΩΠΨΣΘΞ\x1bÆæßÉ !\"#¤%&'()*+,-./0123456789:;<=>?" +
                "¡ABCDEFGHIJKLMNOPQRSTUVWXYZÄÖÑܧ¿abcdefghijklmnopqrstuvwxyzäöñüà";

        // Basic Character Set Extension 
        private const string EXTENSION_SET =
                "````````````````````^```````````````````{}`````\\````````````[~]`" +
                "|````````````````````````````````````€``````````````````````````";

        // If the character is in the extension set, it must be preceded
        // with an 'ESC' character whose index is '27' in the Basic Character Set
        private const int ESC_INDEX = 27;

        public static string StringToGSMHexString(string text, bool delimitWithDash = true)
        {
            // Replace \r\n with \r to reduce character count
            text = text.Replace(Environment.NewLine, "\r");

            // Use this list to store the index of the character in 
            // the basic/extension character sets
            var indicies = new List<int>();

            foreach (var c in text)
            {
                int index = BASIC_SET.IndexOf(c);
                if (index != -1)
                {
                    indicies.Add(index);
                    continue;
                }

                index = EXTENSION_SET.IndexOf(c);
                if (index != -1)
                {
                    // Add the 'ESC' character index before adding 
                    // the extension character index
                    indicies.Add(ESC_INDEX);
                    indicies.Add(index);
                    continue;
                }
            }

            // Convert indicies to 2-digit hex
            var hex = indicies.Select(i => i.ToString("X2")).ToArray();

            string delimiter = delimitWithDash ? "-" : "";

            // Delimit output
            string delimited = string.Join(delimiter, hex);
            return delimited;
        }

这将导致 4 个段现在您可以说使用第二种方法我可以简单地将段分成两半以获得正确的数字，但事实并非如此

如果我例如制作字符串

Hello there stackoverflow this is a string that should be segmented into 2 segments for some reason my code only says 1 segment of 17 segments which is not right at allHello there stackoverflow this is a string that should be segmented into 2 segments for some reason my code only says 1 segment of 17 segments which is not right at all

然后在网站上，我将取回 3 个片段，使用我的代码，我将取回 7 个片段

标签： c#