[.NET][C#]ASCII 轉EBCDIC字元編碼系統

2016-07-22

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Encoding
2017-01-28

之前的筆記把EBCDIC編碼轉換為ASCII編碼，今天筆記ASCII轉EBCDIC(筆)!

https://dotblogs.com.tw/stanley14/2016/02/08/110512

1.首先按照VB版的kb宣告ASC TO EBCDIC轉碼表

static byte[] AsciiToEbcdic = new byte[]{
0x00,0x01,0x02,0x03,0x37,0x2D,0x2E,0x2F,0x16,0x05,0x25,0x0B,0x0C,0x0D,0x0E,0x0F,
0x10,0x11,0x12,0x13,0x3C,0x3D,0x32,0x26,0x18,0x19,0x3F,0x27,0x1C,0x1D,0x1E,0x1F,
0x40,0x5A,0x7F,0x7B,0x5B,0x6C,0x50,0x7D,0x4D,0x5D,0x5C,0x4E,0x6B,0x60,0x4B,0x61,
0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0x7A,0x5E,0x4C,0x7E,0x6E,0x6F,
0x7C,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,
0xD7,0xD8,0xD9,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xBA,0xE0,0xBB,0x5F,0x6D,
0x79,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x91,0x92,0x93,0x94,0x95,0x96,
0x97,0x98,0x99,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xC0,0x4F,0xD0,0xA1,0x07,
0x20,0x21,0x22,0x23,0x24,0x15,0x06,0x17,0x28,0x29,0x2A,0x2B,0x2C,0x09,0x0A,0x1B,
0x30,0x31,0x1A,0x33,0x34,0x35,0x36,0x08,0x38,0x39,0x3A,0x3B,0x04,0x14,0x3E,0xE1,
0x41,0x42,0x4A,0x44,0x45,0x46,0x47,0x48,0x49,0x51,0x52,0x53,0x54,0x55,0x56,0x57,
0x58,0x59,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x70,0x71,0x72,0x73,0x74,0x75,
0x76,0x77,0x78,0x80,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x9A,0x9B,0x9C,0x9D,0x9E,
0x9F,0xA0,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,
0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,0xDA,0xDB,
0xDC,0xDD,0xDE,0xDF,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF
              };

2.建立轉換方法

public static byte[] ConvertAsciiToEbcdic(byte[] asciiData)
{
    //宣告輸出位元組陣列
    Byte[] OutByte = new byte[asciiData.Length];
    //逐Byte依照Mapping TABLE轉出
    for (int i = 0; i < asciiData.Length; i++)
    {
        OutByte[i] = AsciiToEbcdic[(int)asciiData[i]];
    }
    return OutByte;
}

這邊我們用上一篇EBCDIC To ASCII的轉換測試結果試著轉換回去

也就是說414261623031323A2340 要轉回C1C28182F0F1F27A7B7C

依據ASCII Table( 火星任務電影有用到喔！)

預定轉換結果:

字元	EBCDIC(	ASCII
A	0xC1	0x41
B	0xC2	0x42
a	0x81	0x61
b	0x82	0x62
0	0xF0	0x30
1	0xF1	0x31
2	0xF2	0x32
:	0x7A	0x3A
#	0x7B	0x23
@	0x7C	0x40

3.建立測試程式

[TestMethod]
public void TestASCII2EBCDIC()
{
    //ASCII 41:[A] 42:[B] 
    //ASCII 61:[a] 62:[b]
    //ASCII 30:[0] 31:[1] 32:[2] 
    //ASCII 3A:[:] 23:[#] 40:[@]
    byte[] MyASCIICbyte = new byte[] { 0x41, 0x42, 0x61, 0x62, 0x30, 0x31, 0x32, 0x3A, 0x23, 0x40 };
    byte[] MyEBCDICbyte = ConvertAsciiToEbcdic(MyASCIICbyte);
    Console.WriteLine("ASCII: {0}", MyASCIICbyte.BToHex());
    Console.WriteLine("EBCDIC: {0}", MyEBCDICbyte.BToHex());
}

測試結果: