生成Shift-JIS码表

ShiftJis.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

namespace ShiftJisCodeTable
{
    class Program
    {
        static void Main(string[] args)
        {
            Encoding ShiftJIS = Encoding.GetEncoding("Shift-JIS", new EncoderExceptionFallback(), new DecoderExceptionFallback());
            Encoding GB2312 = Encoding.GetEncoding("GB2312", new EncoderExceptionFallback(), new DecoderExceptionFallback());
            Encoding GBK = Encoding.GetEncoding("GBK", new EncoderExceptionFallback(), new DecoderExceptionFallback());

            IList<int> codes = new List<int>();

            for (int b = 0x20; b <= 0x7E; b++) codes.Add(b);
            for (int b = 0xA1; b <= 0xDF; b++) codes.Add(b);

            for (int highByte = 0x81; highByte <= 0x9F; highByte++)
            {
                for (int lowByte = 0x40; lowByte <= 0xFC; lowByte++)
                {
                    if (lowByte == 0x7F) continue;
                    codes.Add((highByte << 8) | lowByte);
                }
            }

            for (int highByte = 0xE0; highByte <= 0xEF; highByte++)
            {
                for (int lowByte = 0x40; lowByte <= 0xFC; lowByte++)
                {
                    if (lowByte == 0x7F) continue;
                    codes.Add((highByte << 8) | lowByte);
                }
            }

            for (int highByte = 0xFA; highByte <= 0xFC; highByte++)
            {
                for (int lowByte = 0x40; lowByte <= 0xFC; lowByte++)
                {
                    if (lowByte == 0x7F) continue;
                    codes.Add((highByte << 8) | lowByte);
                }
            }

            StringBuilder sb = new StringBuilder();
            Dictionary<int, int> unicode2shiftjis = new Dictionary<int, int>();
            foreach (int code in codes)
            {
                byte[] data = null;

                try
                {
                    if (code > 0xFF)
                    {
                        data = new byte[2];
                        data[1] = (byte)(code & 0xFF);
                        data[0] = (byte)((code >> 8) & 0xFF);
                    }
                    else
                    {
                        data = new byte[1];
                        data[0] = (byte)(code & 0xFF);
                    }
                    string str = ShiftJIS.GetString(data);
                    if (str.Length != 1)
                    {
                        continue;
                    }
                    char ch = str[0];
                    string gbkCodeStr = "-";
                    try
                    {
                        byte[] gbkBytes = GB2312.GetBytes(str);
                        int gbkCode = 0;
                        if (gbkBytes.Length == 1)
                        {
                            gbkCode = gbkBytes[0];
                        }
                        else if (gbkBytes.Length == 2)
                        {
                            gbkCode = gbkBytes[0] << 8 | gbkBytes[1];
                        }

                        gbkCodeStr = string.Format("{0:X4}", gbkCode);
                    }
                    catch (Exception ex)
                    {
                        //
                    }
                    string pair = string.Format("{0:X4}={1}(&#{2})(GBK:{3})", code, ch, (int)ch, gbkCodeStr); // (&#{2})
                    if (unicode2shiftjis.ContainsKey((int)ch)) unicode2shiftjis[(int)ch]++;
                    else unicode2shiftjis[(int)ch] = 1;
                    Console.WriteLine(pair);
                    sb.Append(pair);
                    sb.Append("\r\n");
                }
                catch (ArgumentNullException ex)
                {
                    Console.WriteLine(ex.Message);
                }
                catch (DecoderFallbackException ex)
                {
                    // Console.WriteLine(ex.Message);
                }
                catch (ArgumentException ex)
                {
                    Console.WriteLine(ex.Message);
                }
            }

            File.WriteAllText(@"D:\temp\shift-jis.tbl", sb.ToString());

            foreach (var entry in unicode2shiftjis)
            {
                if (entry.Value > 1)
                    Console.WriteLine(string.Format("{0:X4}\t{1}", entry.Key, entry.Value));
            }

            Console.WriteLine("按任意键结束");
            Console.ReadKey();
        }
    }
}