BASE62 (AN61 : AlphaNumeric61)

BASE64 Encode에는 +/= 기본형 또는 -_= URL형이 있다.
여기서, 항상 특수문자가 문제가 되어, 0~9, A~Z, a~z만으로 이루어진 Base62 (및 AN61 : AlphaNumeric61)을 만들어 보았다.

원리

AN61

Unicode값	UTF-8	Byte단위 값의 범위	비고
0x000000~0x00007F	0xxx xxxx	0x00~0x7F	ASCII
0x000080~0x0007FF	110x xxxx 10xx xxxx	0xC0~0xDF, 0x80~0xBF	유럽
0x000800~0x00FFFF	1110 xxxx 10xx xxxx 10xx xxxx	0xE0~0xEF, 0x80~0xBF	한글등
0x010000~0x10FFFF	1111 0zzz 10zz xxxx 10xx xxxx 10xx xxxx	0xF0~0xF7, 0x80~0xBF

여기서, 0x0000 ~ 0xFFFF까지 UCS2에 거의 세계의 주요 문자가 속한다.
(실제로, java나 C#에서 String.length(), String.Length은 문자의 수가 아닌 UTF-16의 길이이다.)

그래서, 0x00~0x7F, 0x80~0xBF, 0xC0~0xDF, 0xE0~0xEF 즉, 0x00~0xEF(240가지)만 주로 사용된다.
240³ < 61⁴ ( 13,824,000 < 13,845,841 ) 이다. (즉, 240가지 3덩어리를 61가지 4덩어리로 표현가능하다.)

BASE64 Encode의 원리도
256³ = 64⁴ 즉, 2⁽⁸³⁾ = 2⁽⁶4) 로 3Byte을 6bit씩 4덩어리로 표현한 것이다.

Base62

여기서, 62가지중 ‘z’를 escape(0xFX영역)하여 Binary도 지원한다.
Base62 [ Binary To String Encoding / Decoding(String To Binary) ]에서는 아래와 같이 한다.

3 Byte	Value
xxxx xxxx yyyy yyyy 1111 zzzz	001 xxxx xxxx yyyy yyyy zzzz
xxxx xxxx 1111 yyyy zzzz zzzz	010 xxxx xxxx yyyy zzzz zzzz
xxxx xxxx 1111 yyyy 1111 zzzz	011 0000 xxxx xxxx yyyy zzzz
1111 xxxx yyyy yyyy zzzz zzzz	100 xxxx yyyy yyyy zzzz zzzz
1111 xxxx yyyy yyyy 1111 zzzz	101 0000 xxxx yyyy yyyy zzzz
1111 xxxx 1111 yyyy zzzz zzzz	110 0000 xxxx yyyy zzzz zzzz
1111 xxxx 1111 yyyy 1111 zzzz	111 0000 0000 xxxx yyyy zzzz

3Byte중 0xF0 ~ 0xFF ( 0xFX )에 해당 Byte을 위와 같이 Value를 전환하여 보면, 23bit로 표현이 가능하다.
상위 3bit는 0xFX의 위치를 표시하며, 하위 20bit가 나머지 값이다.

2²³ < 240³ < 61⁴ ( 8,388,608 < 13,824,000 < 13,845,841 ) 이므로 표현이 가능하다.

2 Byte	Value
xxxx xxxx 1111 yyyy	01 xxxx xxxx yyyy
1111 xxxx yyyy yyyy	10 xxxx yyyy yyyy
1111 xxxx 1111 yyyy	11 0000 xxxx yyyy

2¹⁴ < 240² < 61³ ( 16,384 < 57,600 < 226,981 ) 이므로 표현이 가능하다.

1 Byte	Value
1111 xxxx	1 xxxx

2⁵ < 240¹ < 61² ( 32 < 240 < 3,721 ) 이므로 표현이 가능하다.

Encoding

Base62 : Binary to AlphaNumeric Only String Encoding
AN61 : UCS2 String to AlphaNumeric Only String Encoding
AN62 : All Unicode String to AlphaNumeric Only String Encoding - https://github.com/zhangsob/AN62 참조

장단점

단점 : BASE64는 bit연산으로 구현하고, Base62(AN61)는 산술연산으로 다소 속도는 느림

장점 : 특수문자(기호)가 없어 어떠한 환경에서 값으로 사용할 수 있음.

지원언어

아래 언어로 소스코드를 올립니다.

java : BASE62 예, AN61 예
javascript : BASE62 예, AN61 예
python : BASE62 예, AN61 예
c# : BASE62 예, AN61 예
cpp : BASE62 예 (Windows), AN61 예 (Windows), AN61 예 (Linux)
pascal : BASE62 예, AN61 예 (Delphi), AN61 예 (Free Pascal)
php : BASE62 예, AN61 예
kotlin : BASE62 예, AN61 예

Java BASE62 예

public static void main(String[] args) {
    try {
        byte[] bin = new byte[256] ;
        for(int i = 0; i < bin.length; ++i)
            bin[i] = (byte)i ;
        System.out.println("----bin["+bin.length+"]----") ;
        System.out.println(Base62.bin2hexa(bin)) ;
        String txt = Base62.encode(bin) ;
        System.out.println("txt["+txt.length()+"]:" + txt) ;
        byte[] out = Base62.decode(txt) ;
        System.out.println("----out["+out.length+"]----") ;
        System.out.println(Base62.bin2hexa(out)) ;
    } catch(Exception e) {
        e.printStackTrace();
    }
}

----bin[256]----
00 01 02 03 04 05 06 07  08 09 0A 0B 0C 0D 0E 0F 
10 11 12 13 14 15 16 17  18 19 1A 1B 1C 1D 1E 1F 
20 21 22 23 24 25 26 27  28 29 2A 2B 2C 2D 2E 2F 
30 31 32 33 34 35 36 37  38 39 3A 3B 3C 3D 3E 3F 
40 41 42 43 44 45 46 47  48 49 4A 4B 4C 4D 4E 4F 
50 51 52 53 54 55 56 57  58 59 5A 5B 5C 5D 5E 5F 
60 61 62 63 64 65 66 67  68 69 6A 6B 6C 6D 6E 6F 
70 71 72 73 74 75 76 77  78 79 7A 7B 7C 7D 7E 7F 
80 81 82 83 84 85 86 87  88 89 8A 8B 8C 8D 8E 8F 
90 91 92 93 94 95 96 97  98 99 9A 9B 9C 9D 9E 9F 
A0 A1 A2 A3 A4 A5 A6 A7  A8 A9 AA AB AC AD AE AF 
B0 B1 B2 B3 B4 B5 B6 B7  B8 B9 BA BB BC BD BE BF 
C0 C1 C2 C3 C4 C5 C6 C7  C8 C9 CA CB CC CD CE CF 
D0 D1 D2 D3 D4 D5 D6 D7  D8 D9 DA DB DC DD DE DF 
E0 E1 E2 E3 E4 E5 E6 E7  E8 E9 EA EB EC ED EE EF 
F0 F1 F2 F3 F4 F5 F6 F7  F8 F9 FA FB FC FD FE FF 
txt[348]:003x0kgb1WKF2Hws33aW3oEA4Zqn5LUR67856rki7dOM8P209Aed9vIHAguuBSYYCECCCyopDkSTEW67FHikG3MOGo02HZcfILGJJ6swJrWaKdAELOmrMAQVMv49NggmOSKQPDx4PyahQkELRVqySHUcT38GTnktUZOXVL2BW6eoWrISXcv6YOYjZACNZup1agSebS6IcDivcyMZdk0DeVcqfHGUg2t8gnWlhZAPiKn3j6Qgjr4KkcgxlOKbm9xFmuasngEWoRrApDUnpy8Rqjl5rVOisH2Mt2f0tnIduYvHvKYuw6CYwqpCxcSpyO6TzWKagzWKo7zWL2XzWLFxzWLTOz0V
----out[256]----
00 01 02 03 04 05 06 07  08 09 0A 0B 0C 0D 0E 0F 
10 11 12 13 14 15 16 17  18 19 1A 1B 1C 1D 1E 1F 
20 21 22 23 24 25 26 27  28 29 2A 2B 2C 2D 2E 2F 
30 31 32 33 34 35 36 37  38 39 3A 3B 3C 3D 3E 3F 
40 41 42 43 44 45 46 47  48 49 4A 4B 4C 4D 4E 4F 
50 51 52 53 54 55 56 57  58 59 5A 5B 5C 5D 5E 5F 
60 61 62 63 64 65 66 67  68 69 6A 6B 6C 6D 6E 6F 
70 71 72 73 74 75 76 77  78 79 7A 7B 7C 7D 7E 7F 
80 81 82 83 84 85 86 87  88 89 8A 8B 8C 8D 8E 8F 
90 91 92 93 94 95 96 97  98 99 9A 9B 9C 9D 9E 9F 
A0 A1 A2 A3 A4 A5 A6 A7  A8 A9 AA AB AC AD AE AF 
B0 B1 B2 B3 B4 B5 B6 B7  B8 B9 BA BB BC BD BE BF 
C0 C1 C2 C3 C4 C5 C6 C7  C8 C9 CA CB CC CD CE CF 
D0 D1 D2 D3 D4 D5 D6 D7  D8 D9 DA DB DC DD DE DF 
E0 E1 E2 E3 E4 E5 E6 E7  E8 E9 EA EB EC ED EE EF 
F0 F1 F2 F3 F4 F5 F6 F7  F8 F9 FA FB FC FD FE FF

Java AN61 예

public static void main(String[] args) {
    try {
        String src0 = "http://test.com:8080/an61.do?name=가나다 ㄱㄴ※\n可" ;
        System.out.println("src0["+src0.length()+"]:" + src0) ;
        String an61__tmp0 = AN61.encode(src0) ;
        System.out.println("an61__tmp0["+an61__tmp0.length()+"]:" + an61__tmp0) ;
        String an61__out0 = AN61.decode(an61__tmp0) ;
        System.out.println("an61__out0["+an61__out0.length()+"]:" + an61__out0) ;
        System.out.println("src0.equals(an61__out0) : " + src0.equals(an61__out0)) ;
        String base64_tmp = java.util.Base64.getEncoder().encodeToString(src0.getBytes("utf8")) ;
        System.out.println("base64_tmp["+base64_tmp.length()+"]:" + base64_tmp) ;
        String base64_out = new String(java.util.Base64.getDecoder().decode(base64_tmp), "utf8") ;
        System.out.println("base64_out["+base64_out.length()+"]:" + base64_out) ;
        // [ 코끼리 = Unicode : 01F418, UTF16 : D83D DC18, UTF8 : F0 9F 90 98 ]
        String src1 = "http://test.com:8080/an61.do?name=가나다 ㄱㄴ※\n可🐘" ;    // UnsupportedEncodingException이 발생하는 경우
        System.out.println("src1["+src1.length()+"]:" + src1) ;        // String.length()은 문자갯수가 아니라, UTF16의 길이다. 
        try {
            String tmp1 = AN61.encode(src1) ;
            System.out.println("tmp1:" + tmp1) ;
            String out1 = AN61.decode(tmp1) ;
            System.out.println("out1:" + out1) ;
        } catch(UnsupportedEncodingException uee) {
            System.err.println(uee) ;
            String tmp2 = Base62.encode(src1.getBytes("utf8")) ;
            System.out.println("tmp2["+tmp2.length()+"]:" + tmp2) ;
            String out2 = new String(Base62.decode(tmp2), "utf8") ;
            System.out.println("out2["+out2.length()+"]:" + out2) ;
            System.out.println("src1.equals(out2) : " + src1.equals(out2)) ;
        }
    } catch(Exception e) {
        e.printStackTrace();
    }
}

src0[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
an61__tmp0[76]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
an61__out0[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
src0.equals(an61__out0) : true
base64_tmp[76]:aHR0cDovL3Rlc3QuY29tOjgwODAvYW42MS5kbz9uYW1lPeqwgOuCmOuLpCDjhLHjhLTigLsK5Y+v
base64_out[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
src1[45]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可🐘
java.io.UnsupportedEncodingException: invalid UCS2 character index 43 🐘
tmp2[83]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7YzIeAi2U
out2[45]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可🐘
src1.equals(out2) : true

JavaScript BASE62 예

try {
    var bin = [], i = 0 ;
    for(i = 0;i < 256; ++i)
        bin[i] = i ;
    print('----bin['+bin.length+']----') ;
    print(Base62.bin2hexa(bin)) ;
    var txt = Base62.encode(bin) ;
    print('txt['+txt.length+']:' + txt) ;
    var out = Base62.decode(txt) ;
    print('----out['+out.length+']----') ;
    print(Base62.bin2hexa(out)) ;
} catch(e) {
    print(e) ;
}

----bin[256]----
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F
30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F
40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F
60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F
70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7D 7E 7F
80 81 82 83 84 85 86 87 88 89 8A 8B 8C 8D 8E 8F
90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF
B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF
C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF
E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF
F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF
txt[348]:003x0kgb1WKF2Hws33aW3oEA4Zqn5LUR67856rki7dOM8P209Aed9vIHAguuBSYYCECCCyopDkSTEW67FHikG3MOGo02HZcfILGJJ6swJrWaKdAELOmrMAQVMv49NggmOSKQPDx4PyahQkELRVqySHUcT38GTnktUZOXVL2BW6eoWrISXcv6YOYjZACNZup1agSebS6IcDivcyMZdk0DeVcqfHGUg2t8gnWlhZAPiKn3j6Qgjr4KkcgxlOKbm9xFmuasngEWoRrApDUnpy8Rqjl5rVOisH2Mt2f0tnIduYvHvKYuw6CYwqpCxcSpyO6TzWKagzWKo7zWL2XzWLFxzWLTOz0V
----out[256]----
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F
30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F
40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F
60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F
70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7D 7E 7F
80 81 82 83 84 85 86 87 88 89 8A 8B 8C 8D 8E 8F
90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF
B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF
C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF
E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF
F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF

JavaScript AN61 예

try {
    var src0 = "http://test.com:8080/an61.do?name=가나다 ㄱㄴ※\n可" ;
    print('src0['+src0.length+']:' + src0) ;
    var tmp0 = AN61.encode(src0) ;
    print('tmp0['+tmp0.length+']:' + tmp0) ;
    var out0 = AN61.decode(tmp0) ;
    print('out0['+out0.length+']:' + out0) ;
    print('src0 === out0 : ' + (src0 === out0)) ;
    // [ 코끼리 = Unicode : 01F418, UTF16 : D83D DC18, UTF8 : F0 9F 90 98 ]
    var src1 = "http://test.com:8080/an61.do?name=가나다 ㄱㄴ※\n可🐘" ;    // Exception이 발생하는 경우
    print('src1['+src1.length+']:' + src1) ;
    try {
        var tmp1 = AN61.encode(src1) ;
        print("tmp1:" + tmp1) ;
        var out1 = AN61.decode(tmp1) ;
        print("out1:" + out1) ;
    }
    catch(e) {
        console.error(e) ;
        console.log('typeof Base62 : ' + (typeof Base62)) ;
        if(typeof Base62 === 'object') {
            var tmp2 = Base62.encode(AN61.toUTF8(src1)) ;
            print('tmp2['+tmp2.length+']:' + tmp2) ;
            var out2 = AN61.fromUTF8(Base62.decode(tmp2)) ;
            print('out2['+out2.length+']:' + out2) ;
            print('src1 === out2 : ' + (src1 === out2)) ;
        }
    }
} catch(e) {
    print(e) ;
}

src0[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
tmp0[76]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
out0[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
src0 === out0 : true
src1[45]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可🐘
invalid UCS2 character index 43 🐘
typeof Base62 : object
tmp2[83]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7YzIeAi2U
out2[45]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可🐘
src1 === out2 : true

Python BASE62 예

if __name__ == '__main__':
    bin = bytearray(256) ;
    for i in range(len(bin)) :
        bin[i] = i
    print('----bin['+str(len(bin))+']----')
    print(Base62.bin2hexa(bin))
    txt = Base62.encode(bin)
    print('txt['+str(len(txt))+']:'+txt)
    out = Base62.decode(txt)
    print('----out['+str(len(out))+']----')
    print(Base62.bin2hexa(out))

----bin[256]----
00 01 02 03 04 05 06 07  08 09 0A 0B 0C 0D 0E 0F
10 11 12 13 14 15 16 17  18 19 1A 1B 1C 1D 1E 1F
20 21 22 23 24 25 26 27  28 29 2A 2B 2C 2D 2E 2F
30 31 32 33 34 35 36 37  38 39 3A 3B 3C 3D 3E 3F
40 41 42 43 44 45 46 47  48 49 4A 4B 4C 4D 4E 4F
50 51 52 53 54 55 56 57  58 59 5A 5B 5C 5D 5E 5F
60 61 62 63 64 65 66 67  68 69 6A 6B 6C 6D 6E 6F
70 71 72 73 74 75 76 77  78 79 7A 7B 7C 7D 7E 7F
80 81 82 83 84 85 86 87  88 89 8A 8B 8C 8D 8E 8F
90 91 92 93 94 95 96 97  98 99 9A 9B 9C 9D 9E 9F
A0 A1 A2 A3 A4 A5 A6 A7  A8 A9 AA AB AC AD AE AF
B0 B1 B2 B3 B4 B5 B6 B7  B8 B9 BA BB BC BD BE BF
C0 C1 C2 C3 C4 C5 C6 C7  C8 C9 CA CB CC CD CE CF
D0 D1 D2 D3 D4 D5 D6 D7  D8 D9 DA DB DC DD DE DF
E0 E1 E2 E3 E4 E5 E6 E7  E8 E9 EA EB EC ED EE EF
F0 F1 F2 F3 F4 F5 F6 F7  F8 F9 FA FB FC FD FE FF
txt[348]:003x0kgb1WKF2Hws33aW3oEA4Zqn5LUR67856rki7dOM8P209Aed9vIHAguuBSYYCECCCyopDkSTEW67FHikG3MOGo02HZcfILGJJ6swJrWaKdAELOmrMAQVMv49NggmOSKQPDx4PyahQkELRVqySHUcT38GTnktUZOXVL2BW6eoWrISXcv6YOYjZACNZup1agSebS6IcDivcyMZdk0DeVcqfHGUg2t8gnWlhZAPiKn3j6Qgjr4KkcgxlOKbm9xFmuasngEWoRrApDUnpy8Rqjl5rVOisH2Mt2f0tnIduYvHvKYuw6CYwqpCxcSpyO6TzWKagzWKo7zWL2XzWLFxzWLTOz0V
----out[256]----
00 01 02 03 04 05 06 07  08 09 0A 0B 0C 0D 0E 0F
10 11 12 13 14 15 16 17  18 19 1A 1B 1C 1D 1E 1F
20 21 22 23 24 25 26 27  28 29 2A 2B 2C 2D 2E 2F
30 31 32 33 34 35 36 37  38 39 3A 3B 3C 3D 3E 3F
40 41 42 43 44 45 46 47  48 49 4A 4B 4C 4D 4E 4F
50 51 52 53 54 55 56 57  58 59 5A 5B 5C 5D 5E 5F
60 61 62 63 64 65 66 67  68 69 6A 6B 6C 6D 6E 6F
70 71 72 73 74 75 76 77  78 79 7A 7B 7C 7D 7E 7F
80 81 82 83 84 85 86 87  88 89 8A 8B 8C 8D 8E 8F
90 91 92 93 94 95 96 97  98 99 9A 9B 9C 9D 9E 9F
A0 A1 A2 A3 A4 A5 A6 A7  A8 A9 AA AB AC AD AE AF
B0 B1 B2 B3 B4 B5 B6 B7  B8 B9 BA BB BC BD BE BF
C0 C1 C2 C3 C4 C5 C6 C7  C8 C9 CA CB CC CD CE CF
D0 D1 D2 D3 D4 D5 D6 D7  D8 D9 DA DB DC DD DE DF
E0 E1 E2 E3 E4 E5 E6 E7  E8 E9 EA EB EC ED EE EF
F0 F1 F2 F3 F4 F5 F6 F7  F8 F9 FA FB FC FD FE FF

Python AN61 예

if __name__ == '__main__':
    src0 = 'http://test.com:8080/an61.do?name=가나다 ㄱㄴ※\n可'
    print('src0['+str(len(src0))+']:' + src0)
    an61__tmp0 = AN61.encode(src0)
    print('an61__tmp0['+str(len(an61__tmp0))+']:' + an61__tmp0)
    an61__out0 = AN61.decode(an61__tmp0)
    print('an61__out0['+str(len(an61__out0))+']:' + an61__out0)
    print('src0 == an61__out0 :', (src0 == an61__out0))
    base64_tmp = base64.b64encode(src0.encode('utf8')).decode('utf8')
    print('base64_tmp['+str(len(base64_tmp))+']:' + base64_tmp)
    base64_out = base64.b64decode(base64_tmp.encode('utf8')).decode('utf8')
    print('base64_out['+str(len(base64_out))+']:' + base64_out)
    # [ 코끼리 = Unicode : 01F418, UTF16 : D83D DC18, UTF8 : F0 9F 90 98 ]
    src1 = "http://test.com:8080/an61.do?name=가나다 ㄱㄴ※\n可🐘" # ValueError가 발생하는 경우
    print('src1['+str(len(src1))+']:' + src1)
    try :
        tmp1 = AN61.encode(src1)
        print('tmp1:' + tmp1)
        out1 = AN61.decode(tmp1)
        print('out1:' + out1)
    except ValueError as ve :
        print('Error : ' + str(ve))
        tmp2 = Base62.encode(src1.encode("utf8"))
        print('tmp2['+str(len(tmp2))+']:' + tmp2)
        out2 = Base62.decode(tmp2).decode("utf8")
        print('out2['+str(len(out2))+']:' + out2)
        print('src1 == out2 :', (src1 == out2))

src0[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
an61__tmp0[76]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y       
an61__out0[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
src0 == an61__out0 : True
base64_tmp[76]:aHR0cDovL3Rlc3QuY29tOjgwODAvYW42MS5kbz9uYW1lPeqwgOuCmOuLpCDjhLHjhLTigLsK5Y+v       
base64_out[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
src1[44]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可�🐘
Error : Illegal base62 character index 43 �🐘
tmp2[83]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7YzIeAi2U      
out2[44]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可�🐘
src1 == out2 : True

C# BASE62 예

static void Main(string[] args)
{
    byte[] bin = new byte[256];
    for (int i = 0, len = bin.Length; i < len; ++i)
        bin[i] = (byte)i;
    Console.WriteLine("----bin[" + bin.Length + "]----");
    Console.WriteLine(Base62.bin2hexa(bin));
    string txt = Base62.encode(bin);
    Console.WriteLine("txt[" + txt.Length + "]:" + txt);
    byte[] dst = Base62.decode(txt);
    Console.WriteLine("----dst[" + dst.Length + "]----");
    Console.WriteLine(Base62.bin2hexa(dst));
}

----bin[256]----
00 01 02 03 04 05 06 07  08 09 0A 0B 0C 0D 0E 0F
10 11 12 13 14 15 16 17  18 19 1A 1B 1C 1D 1E 1F
20 21 22 23 24 25 26 27  28 29 2A 2B 2C 2D 2E 2F
30 31 32 33 34 35 36 37  38 39 3A 3B 3C 3D 3E 3F
40 41 42 43 44 45 46 47  48 49 4A 4B 4C 4D 4E 4F
50 51 52 53 54 55 56 57  58 59 5A 5B 5C 5D 5E 5F
60 61 62 63 64 65 66 67  68 69 6A 6B 6C 6D 6E 6F
70 71 72 73 74 75 76 77  78 79 7A 7B 7C 7D 7E 7F
80 81 82 83 84 85 86 87  88 89 8A 8B 8C 8D 8E 8F
90 91 92 93 94 95 96 97  98 99 9A 9B 9C 9D 9E 9F
A0 A1 A2 A3 A4 A5 A6 A7  A8 A9 AA AB AC AD AE AF
B0 B1 B2 B3 B4 B5 B6 B7  B8 B9 BA BB BC BD BE BF
C0 C1 C2 C3 C4 C5 C6 C7  C8 C9 CA CB CC CD CE CF
D0 D1 D2 D3 D4 D5 D6 D7  D8 D9 DA DB DC DD DE DF
E0 E1 E2 E3 E4 E5 E6 E7  E8 E9 EA EB EC ED EE EF
F0 F1 F2 F3 F4 F5 F6 F7  F8 F9 FA FB FC FD FE FF
txt[348]:003x0kgb1WKF2Hws33aW3oEA4Zqn5LUR67856rki7dOM8P209Aed9vIHAguuBSYYCECCCyopDkSTEW67FHikG3MOGo02HZcfILGJJ6swJrWaKdAELOmrMAQVMv49NggmOSKQPDx4PyahQkELRVqySHUcT38GTnktUZOXVL2BW6eoWrISXcv6YOYjZACNZup1agSebS6IcDivcyMZdk0DeVcqfHGUg2t8gnWlhZAPiKn3j6Qgjr4KkcgxlOKbm9xFmuasngEWoRrApDUnpy8Rqjl5rVOisH2Mt2f0tnIduYvHvKYuw6CYwqpCxcSpyO6TzWKagzWKo7zWL2XzWLFxzWLTOz0V
----dst[256]----
00 01 02 03 04 05 06 07  08 09 0A 0B 0C 0D 0E 0F
10 11 12 13 14 15 16 17  18 19 1A 1B 1C 1D 1E 1F
20 21 22 23 24 25 26 27  28 29 2A 2B 2C 2D 2E 2F
30 31 32 33 34 35 36 37  38 39 3A 3B 3C 3D 3E 3F
40 41 42 43 44 45 46 47  48 49 4A 4B 4C 4D 4E 4F
50 51 52 53 54 55 56 57  58 59 5A 5B 5C 5D 5E 5F
60 61 62 63 64 65 66 67  68 69 6A 6B 6C 6D 6E 6F
70 71 72 73 74 75 76 77  78 79 7A 7B 7C 7D 7E 7F
80 81 82 83 84 85 86 87  88 89 8A 8B 8C 8D 8E 8F
90 91 92 93 94 95 96 97  98 99 9A 9B 9C 9D 9E 9F
A0 A1 A2 A3 A4 A5 A6 A7  A8 A9 AA AB AC AD AE AF
B0 B1 B2 B3 B4 B5 B6 B7  B8 B9 BA BB BC BD BE BF
C0 C1 C2 C3 C4 C5 C6 C7  C8 C9 CA CB CC CD CE CF
D0 D1 D2 D3 D4 D5 D6 D7  D8 D9 DA DB DC DD DE DF
E0 E1 E2 E3 E4 E5 E6 E7  E8 E9 EA EB EC ED EE EF
F0 F1 F2 F3 F4 F5 F6 F7  F8 F9 FA FB FC FD FE FF

C# AN61 예

static void Main(string[] args)
{
    string src0 = "http://test.com:8080/an61.do?name=가나다 ㄱㄴ※\n可";
    Console.WriteLine("src0[" + src0.Length + "]:" + src0);
    string an61__tmp0 = AN61.encode(src0);
    Console.WriteLine("an61__tmp0[" + an61__tmp0.Length + "]:" + an61__tmp0);
    string an61__out0 = AN61.decode(an61__tmp0);
    Console.WriteLine("an61__out0[" + an61__out0.Length + "]:" + an61__out0);
    Console.WriteLine("(src0 == an61__out0) : " + (src0 == an61__out0));
    string base64_tmp = Convert.ToBase64String(Encoding.UTF8.GetBytes(src0));
    Console.WriteLine("base64_tmp[" + base64_tmp.Length + "]:" + base64_tmp);
    string base64_out = Encoding.UTF8.GetString(Convert.FromBase64String(base64_tmp));
    Console.WriteLine("base64_out[" + base64_out.Length + "]:" + base64_out);
    // [ 코끼리 = Unicode : 01F418, UTF16 : D83D DC18, UTF8 : F0 9F 90 98 ]
    string src1 = "http://test.com:8080/an61.do?name=가나다 ㄱㄴ※\n可🐘";    // ArgumentException이 발생하는 경우
    Console.WriteLine("src1[" + src1.Length + "]:" + src1);
    try
    {
        string tmp1 = AN61.encode(src1);
        Console.WriteLine("tmp1:" + tmp1);
        string out1 = AN61.decode(tmp1);
        Console.WriteLine("out1:" + out1);
    }
    catch (ArgumentException ae)
    {
        Console.Error.WriteLine("Error : " + ae.Message);
        string tmp2 = Base62.encode(Encoding.UTF8.GetBytes(src1));
        Console.WriteLine("tmp2[" + tmp2.Length + "]:" + tmp2);
        string out2 = Encoding.UTF8.GetString(Base62.decode(tmp2));
        Console.WriteLine("out2[" + out2.Length + "]:" + out2);
        Console.WriteLine("(src1 == out2) : " + (src1 == out2));
    }
}

src0[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
an61__tmp0[76]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
an61__out0[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
(src0 == an61__out0) : True
base64_tmp[76]:aHR0cDovL3Rlc3QuY29tOjgwODAvYW42MS5kbz9uYW1lPeqwgOuCmOuLpCDjhLHjhLTigLsK5Y+v
base64_out[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
src1[45]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可??
Error : invalid UCS2 character index 43 ??
tmp2[83]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7YzIeAi2U
out2[45]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可??
(src1 == out2) : True

CPP BASE62 예

// charset : ASCII
#include "base62.h"
#include <stdio.h>
std::string bin2hexa(const std::vector<unsigned char>& bin)
{
    std::string ret ;
    char tmp[4] ;
    for (size_t i = 0, len = bin.size(); i < len; ++i) {
        sprintf(tmp, "%02X ", bin[i] & 0xFF) ;
        ret.append(tmp) ;
        if(i % 16 == 7)            ret.push_back(' ') ;
        else if(i % 16 == 15)    ret.push_back('\n') ;
    }
    if(bin.size() % 16 != 0)    ret.push_back('\n') ;
    return ret ;
}
int main(int argc, char *argv[])
{
    std::vector<unsigned char> bin ;
    bin.resize(256) ;
    for(size_t i = 0, len = bin.size(); i < len; ++i)
        bin[i] = (unsigned char)i ;
    printf("----bin[%zu]----\n", bin.size()) ;
    printf("%s\n", bin2hexa(bin).c_str()) ;
    std::string txt = Base62::encode(bin) ;
    printf("txt[%zu]:%s\n", txt.size(), txt.c_str()) ;
    std::vector<unsigned char> out = Base62::decode(txt) ;
    printf("----out[%zu]----\n", out.size()) ;
    printf("%s\n", bin2hexa(out).c_str()) ;
    return 0 ;
}

----bin[256]----
00 01 02 03 04 05 06 07  08 09 0A 0B 0C 0D 0E 0F
10 11 12 13 14 15 16 17  18 19 1A 1B 1C 1D 1E 1F
20 21 22 23 24 25 26 27  28 29 2A 2B 2C 2D 2E 2F
30 31 32 33 34 35 36 37  38 39 3A 3B 3C 3D 3E 3F
40 41 42 43 44 45 46 47  48 49 4A 4B 4C 4D 4E 4F
50 51 52 53 54 55 56 57  58 59 5A 5B 5C 5D 5E 5F
60 61 62 63 64 65 66 67  68 69 6A 6B 6C 6D 6E 6F
70 71 72 73 74 75 76 77  78 79 7A 7B 7C 7D 7E 7F
80 81 82 83 84 85 86 87  88 89 8A 8B 8C 8D 8E 8F
90 91 92 93 94 95 96 97  98 99 9A 9B 9C 9D 9E 9F
A0 A1 A2 A3 A4 A5 A6 A7  A8 A9 AA AB AC AD AE AF
B0 B1 B2 B3 B4 B5 B6 B7  B8 B9 BA BB BC BD BE BF
C0 C1 C2 C3 C4 C5 C6 C7  C8 C9 CA CB CC CD CE CF
D0 D1 D2 D3 D4 D5 D6 D7  D8 D9 DA DB DC DD DE DF
E0 E1 E2 E3 E4 E5 E6 E7  E8 E9 EA EB EC ED EE EF
F0 F1 F2 F3 F4 F5 F6 F7  F8 F9 FA FB FC FD FE FF
txt[348]:003x0kgb1WKF2Hws33aW3oEA4Zqn5LUR67856rki7dOM8P209Aed9vIHAguuBSYYCECCCyopDkSTEW67FHikG3MOGo02HZcfILGJJ6swJrWaKdAELOmrMAQVMv49NggmOSKQPDx4PyahQkELRVqySHUcT38GTnktUZOXVL2BW6eoWrISXcv6YOYjZACNZup1agSebS6IcDivcyMZdk0DeVcqfHGUg2t8gnWlhZAPiKn3j6Qgjr4KkcgxlOKbm9xFmuasngEWoRrApDUnpy8Rqjl5rVOisH2Mt2f0tnIduYvHvKYuw6CYwqpCxcSpyO6TzWKagzWKo7zWL2XzWLFxzWLTOz0V
----out[256]----
00 01 02 03 04 05 06 07  08 09 0A 0B 0C 0D 0E 0F
10 11 12 13 14 15 16 17  18 19 1A 1B 1C 1D 1E 1F
20 21 22 23 24 25 26 27  28 29 2A 2B 2C 2D 2E 2F
30 31 32 33 34 35 36 37  38 39 3A 3B 3C 3D 3E 3F
40 41 42 43 44 45 46 47  48 49 4A 4B 4C 4D 4E 4F
50 51 52 53 54 55 56 57  58 59 5A 5B 5C 5D 5E 5F
60 61 62 63 64 65 66 67  68 69 6A 6B 6C 6D 6E 6F
70 71 72 73 74 75 76 77  78 79 7A 7B 7C 7D 7E 7F
80 81 82 83 84 85 86 87  88 89 8A 8B 8C 8D 8E 8F
90 91 92 93 94 95 96 97  98 99 9A 9B 9C 9D 9E 9F
A0 A1 A2 A3 A4 A5 A6 A7  A8 A9 AA AB AC AD AE AF
B0 B1 B2 B3 B4 B5 B6 B7  B8 B9 BA BB BC BD BE BF
C0 C1 C2 C3 C4 C5 C6 C7  C8 C9 CA CB CC CD CE CF
D0 D1 D2 D3 D4 D5 D6 D7  D8 D9 DA DB DC DD DE DF
E0 E1 E2 E3 E4 E5 E6 E7  E8 E9 EA EB EC ED EE EF
F0 F1 F2 F3 F4 F5 F6 F7  F8 F9 FA FB FC FD FE FF

CPP AN61 예 (Windows)

// charset : EUC-KR(on Windows)
#include "an61.h"
#include "zstring.h"
#include "base62.h"
#include <stdio.h>
int main(int argc, char *argv[])
{
    std::string locale(setlocale(LC_ALL, "")) ;
    printf("locale : [%s]\n", locale.c_str()) ;
    printf("sizeof(wchar_t) : %zd\n", sizeof(wchar_t)) ;
    {
        printf("---wstring to wstring---\n") ;
        std::wstring src0 = L"http://test.com:8080/an62.do?name=가나다 ㄱㄴ※\n可" ;
        printf("src0[%zd]:%s\n", src0.length(), wstring2system(src0).c_str()) ;
        std::string tmp0 = AN61::encode(src0) ;
        printf("tmp0:%s\n", tmp0.c_str()) ;
        std::wstring out0 = AN61::decode(tmp0) ;
        printf("out0:%s\n", wstring2system(out0).c_str()) ;
        printf("src0.compare(out0) : %d\n", src0.compare(out0)) ;
    }
    {
        if(isSystemUTF8())  printf("---UTF8 to UTF8---\n") ;
        else                printf("---EUC-KR to EUC-KR---\n") ;
        std::string src0 = "http://test.com:8080/an62.do?name=가나다 ㄱㄴ※\n可" ;
        printf("src0[%zd]:%s\n", src0.length(), src0.c_str()) ;
        std::string tmp0 = AN61::encode(system2wstring(src0)) ;
        printf("tmp0:%s\n", tmp0.c_str()) ;
        std::string out0 = wstring2system(AN61::decode(tmp0)) ;
        printf("out0:%s\n", out0.c_str()) ;
        printf("src0.compare(out0) : %d\n", src0.compare(out0)) ;
    }
    {
        printf("---wstring to wstring---\n") ;
        // [ 코끼리 = Unicode : 01F418, UTF16 : D83D DC18, UTF8 : F0 9F 90 98 ]
        std::wstring src1 = L"http://test.com:8080/an62.do?name=가나다 ㄱㄴ※\n可" ;
        if(sizeof(wchar_t) == 2) {    // Windows
            src1.push_back((wchar_t)0xD83D) ;
            src1.push_back((wchar_t)0xDC18) ;
        }
        else {    // Linux
            src1.push_back((wchar_t)0x01F418) ;
        }
        printf("src1[%zd]:%s\n", src1.length(), wstring2system(src1).c_str()) ;
        try {
            std::string tmp1 = AN61::encode(src1) ;
            printf("tmp1:%s\n", tmp1.c_str()) ;
            std::wstring out1 = AN61::decode(tmp1) ;
            printf("out1:%s\n", wstring2system(out1).c_str()) ;
        }
        catch(const std::exception& e) {
            fprintf(stderr, "Error : %s\n", e.what()) ;
            std::string utf8 = wstring2utf8(src1) ;
            std::vector<unsigned char> utf8_bin(utf8.cbegin(), utf8.cend()) ;
            std::string tmp2 = Base62::encode(utf8_bin) ;
            printf("tmp2[%zu]:%s\n", tmp2.size(), tmp2.c_str()) ;
            std::vector<unsigned char> out2_bin = Base62::decode(tmp2) ;
            std::string utf8_str(out2_bin.cbegin(), out2_bin.cend()) ;
            std::wstring out2 = utf8_to_wstring(utf8_str) ;
            printf("out2[%zu]:%s\n", out2.size(), wstring2system(out2).c_str()) ;
            printf("src1.compare(out2) : %d\n", src1.compare(out2)) ;
        }
    }
    {
        printf("---utf8 to utf8---\n") ;
        // [ 코끼리 = Unicode : 01F418, UTF16 : D83D DC18, UTF8 : F0 9F 90 98 ]
        std::string utf8 = system2utf8("http://test.com:8080/an62.do?name=가나다 ㄱㄴ※\n可") ;
        utf8.push_back((char)0xF0) ;
        utf8.push_back((char)0x9F) ;
        utf8.push_back((char)0x90) ;
        utf8.push_back((char)0x98) ;
        printf("utf8[%zd]:%s\n", utf8.length(), utf8_to_system(utf8).c_str()) ;
        try {
            std::string tmp1 = AN61::encode(utf8_to_wstring(utf8)) ;    
            printf("tmp1:%s\n", tmp1.c_str()) ;
            std::string out8 = wstring2utf8(AN61::decode(tmp1)) ;
            printf("out8[%zd]:%s\n", out8.length(), utf8_to_system(out8).c_str()) ;
        }
        catch(const std::exception& e) {
            fprintf(stderr, "Error : %s\n", e.what()) ;
            std::vector<unsigned char> utf8_bin(utf8.cbegin(), utf8.cend()) ;
            std::string tmp8 = Base62::encode(utf8_bin) ;
            printf("tmp8[%zu]:%s\n", tmp8.size(), tmp8.c_str()) ;
            std::vector<unsigned char> out8_bin = Base62::decode(tmp8) ;
            std::string out8(out8_bin.cbegin(), out8_bin.cend()) ;
            printf("out8[%zu]:%s\n", utf8.size(), utf8_to_system(utf8).c_str()) ;
            printf("utf8.compare(out8) : %d\n", utf8.compare(out8)) ;
        }
    }
    return 0 ;
}

locale : [Korean_Korea.949]
sizeof(wchar_t) : 2
---wstring to wstring---
src0[43]:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可
tmp0:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CixjSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
out0:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可
src0.compare(out0) : 0
---EUC-KR to EUC-KR---
src0[50]:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可
tmp0:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CixjSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
out0:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可
src0.compare(out0) : 0
---wstring to wstring---
src1[45]:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可??
Error : invalid UCS2 character
tmp2[83]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CixjSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7YzIeAi2U
out2[45]:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可??
src1.compare(out2) : 0
---utf8 to utf8---
utf8[61]:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可??
Error : invalid UCS2 character
tmp8[83]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CixjSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7YzIeAi2U
out8[61]:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可??
utf8.compare(out8) : 0

CPP AN61 예 (Linux)

// charset : UTF-8(on Linux)
#include "an61.h"
#include "zstring.h"
#include "base62.h"
#include <stdio.h>
int main(int argc, char *argv[])
{
    std::string locale(setlocale(LC_ALL, "")) ;
    printf("locale : [%s]\n", locale.c_str()) ;
    printf("sizeof(wchar_t) : %zd\n", sizeof(wchar_t)) ;
    {
        printf("---wstring to wstring---\n") ;
        std::wstring src0 = L"http://test.com:8080/an62.do?name=가나다 ㄱㄴ※\n可" ;
        printf("src0[%zd]:%s\n", src0.length(), wstring2system(src0).c_str()) ;
        std::string tmp0 = AN61::encode(src0) ;
        printf("tmp0:%s\n", tmp0.c_str()) ;
        std::wstring out0 = AN61::decode(tmp0) ;
        printf("out0:%s\n", wstring2system(out0).c_str()) ;
        printf("src0.compare(out0) : %d\n", src0.compare(out0)) ;
    }
    {
        if(isSystemUTF8())  printf("---UTF8 to UTF8---\n") ;
        else                printf("---EUC-KR to EUC-KR---\n") ;
        std::string src0 = "http://test.com:8080/an62.do?name=가나다 ㄱㄴ※\n可" ;
        printf("src0[%zd]:%s\n", src0.length(), src0.c_str()) ;
        std::string tmp0 = AN61::encode(system2wstring(src0)) ;
        printf("tmp0:%s\n", tmp0.c_str()) ;
        std::string out0 = wstring2system(AN61::decode(tmp0)) ;
        printf("out0:%s\n", out0.c_str()) ;
        printf("src0.compare(out0) : %d\n", src0.compare(out0)) ;
    }
    {
        printf("---wstring to wstring---\n") ;
        // [ 코끼리 = Unicode : 01F418, UTF16 : D83D DC18, UTF8 : F0 9F 90 98 ]
        std::wstring src1 = L"http://test.com:8080/an62.do?name=가나다 ㄱㄴ※\n可🐘" ;
        printf("src1[%zd]:%s\n", src1.length(), wstring2system(src1).c_str()) ;
        try {
            std::string tmp1 = AN61::encode(src1) ;
            printf("tmp1:%s\n", tmp1.c_str()) ;
            std::wstring out1 = AN61::decode(tmp1) ;
            printf("out1:%s\n", wstring2system(out1).c_str()) ;
        }
        catch(const std::exception& e) {
            fprintf(stderr, "Error : %s\n", e.what()) ;
            std::string utf8 = wstring2utf8(src1) ;
            std::vector<unsigned char> utf8_bin(utf8.cbegin(), utf8.cend()) ;
            std::string tmp2 = Base62::encode(utf8_bin) ;
            printf("tmp2[%zu]:%s\n", tmp2.size(), tmp2.c_str()) ;
            std::vector<unsigned char> out2_bin = Base62::decode(tmp2) ;
            std::string utf8_str(out2_bin.cbegin(), out2_bin.cend()) ;
            std::wstring out2 = utf8_to_wstring(utf8_str) ;
            printf("out2[%zu]:%s\n", out2.size(), wstring2system(out2).c_str()) ;
            printf("src1.compare(out2) : %d\n", src1.compare(out2)) ;
        }
    }
    {
        printf("---utf8 to utf8---\n") ;
        // [ 코끼리 = Unicode : 01F418, UTF16 : D83D DC18, UTF8 : F0 9F 90 98 ]
        std::string utf8 = system2utf8("http://test.com:8080/an62.do?name=가나다 ㄱㄴ※\n可🐘") ;
        printf("utf8[%zd]:%s\n", utf8.length(), utf8_to_system(utf8).c_str()) ;
        try {
            std::string tmp1 = AN61::encode(utf8_to_wstring(utf8)) ;    
            printf("tmp1:%s\n", tmp1.c_str()) ;
            std::string out8 = wstring2utf8(AN61::decode(tmp1)) ;
            printf("out8[%zd]:%s\n", out8.length(), utf8_to_system(out8).c_str()) ;
        }
        catch(const std::exception& e) {
            fprintf(stderr, "Error : %s\n", e.what()) ;
            std::vector<unsigned char> utf8_bin(utf8.cbegin(), utf8.cend()) ;
            std::string tmp8 = Base62::encode(utf8_bin) ;
            printf("tmp8[%zu]:%s\n", tmp8.size(), tmp8.c_str()) ;
            std::vector<unsigned char> out8_bin = Base62::decode(tmp8) ;
            std::string out8(out8_bin.cbegin(), out8_bin.cend()) ;
            printf("out8[%zu]:%s\n", utf8.size(), utf8_to_system(utf8).c_str()) ;
            printf("utf8.compare(out8) : %d\n", utf8.compare(out8)) ;
        }
    }
    return 0 ;
}

locale : [ko_KR.UTF-8]
sizeof(wchar_t) : 4
---wstring to wstring---
src0[43]:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可
tmp0:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CixjSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
out0:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可
src0.compare(out0) : 0
---UTF8 to UTF8---
src0[57]:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可
tmp0:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CixjSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
out0:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可
src0.compare(out0) : 0
---wstring to wstring---
src1[44]:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可🐘
Error : invalid UCS2 character
tmp2[83]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CixjSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7YzIeAi2U
out2[44]:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可🐘
src1.compare(out2) : 0
---utf8 to utf8---
utf8[61]:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可🐘
Error : invalid UCS2 character
tmp8[83]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CixjSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7YzIeAi2U
out8[61]:http://test.com:8080/an62.do?name=가나다 ㄱㄴ※
可🐘
utf8.compare(out8) : 0

Pascal BASE62 예

program Base62Test;
{$APPTYPE CONSOLE}
uses
  SysUtils, Base62;
function bin2hexa(bin : TBytes) : string ;
const
  HexaString = '0123456789ABCDEF' ;
var
  i : Integer ;
begin
  result := '' ;
  for i := 0 to Length(bin)-1 do
  begin
    result := result + HexaString[1 + (bin[i] shr 4)] ;
    result := result + HexaString[1 + (bin[i] and 15)] ;
    result := result + ' ' ;
    if (i mod 16) = 7 then
      result := result + ' '
    else if (i mod 16) = 15 then
      result := result + #10 ;
  end ;
end;
var
  bin, dst : TBytes ;
  txt : string ;
  i : Integer ;
begin
  SetLength(bin, 256) ;
  for i := 0 to Length(bin)-1 do
    bin[i] := i ;
  WriteLn('---bin[', Length(bin), ']---') ;
  WriteLn(bin2hexa(bin)) ;
  txt := TBase62.Encode(bin) ;
  WriteLn('txt[', Length(txt), ']:', txt) ;
  dst := TBase62.Decode(txt) ;
  WriteLn('---dst[', Length(dst), ']---') ;
  WriteLn(bin2hexa(dst)) ;
  ReadLn;
end.

---bin[256]---
00 01 02 03 04 05 06 07  08 09 0A 0B 0C 0D 0E 0F
10 11 12 13 14 15 16 17  18 19 1A 1B 1C 1D 1E 1F
20 21 22 23 24 25 26 27  28 29 2A 2B 2C 2D 2E 2F
30 31 32 33 34 35 36 37  38 39 3A 3B 3C 3D 3E 3F
40 41 42 43 44 45 46 47  48 49 4A 4B 4C 4D 4E 4F
50 51 52 53 54 55 56 57  58 59 5A 5B 5C 5D 5E 5F
60 61 62 63 64 65 66 67  68 69 6A 6B 6C 6D 6E 6F
70 71 72 73 74 75 76 77  78 79 7A 7B 7C 7D 7E 7F
80 81 82 83 84 85 86 87  88 89 8A 8B 8C 8D 8E 8F
90 91 92 93 94 95 96 97  98 99 9A 9B 9C 9D 9E 9F
A0 A1 A2 A3 A4 A5 A6 A7  A8 A9 AA AB AC AD AE AF
B0 B1 B2 B3 B4 B5 B6 B7  B8 B9 BA BB BC BD BE BF
C0 C1 C2 C3 C4 C5 C6 C7  C8 C9 CA CB CC CD CE CF
D0 D1 D2 D3 D4 D5 D6 D7  D8 D9 DA DB DC DD DE DF
E0 E1 E2 E3 E4 E5 E6 E7  E8 E9 EA EB EC ED EE EF
F0 F1 F2 F3 F4 F5 F6 F7  F8 F9 FA FB FC FD FE FF
txt[348]:003x0kgb1WKF2Hws33aW3oEA4Zqn5LUR67856rki7dOM8P209Aed9vIHAguuBSYYCECCCyopDkSTEW67FHikG3MOGo02HZcfILGJJ6swJrWaKdAELOmrMAQVMv49NggmOSKQPDx4PyahQkELRVqySHUcT38GTnktUZOXVL2BW6eoWrISXcv6YOYjZACNZup1agSebS6IcDivcyMZdk0DeVcqfHGUg2t8gnWlhZAPiKn3j6Qgjr4KkcgxlOKbm9xFmuasngEWoRrApDUnpy8Rqjl5rVOisH2Mt2f0tnIduYvHvKYuw6CYwqpCxcSpyO6TzWKagzWKo7zWL2XzWLFxzWLTOz0V
---dst[256]---
00 01 02 03 04 05 06 07  08 09 0A 0B 0C 0D 0E 0F
10 11 12 13 14 15 16 17  18 19 1A 1B 1C 1D 1E 1F
20 21 22 23 24 25 26 27  28 29 2A 2B 2C 2D 2E 2F
30 31 32 33 34 35 36 37  38 39 3A 3B 3C 3D 3E 3F
40 41 42 43 44 45 46 47  48 49 4A 4B 4C 4D 4E 4F
50 51 52 53 54 55 56 57  58 59 5A 5B 5C 5D 5E 5F
60 61 62 63 64 65 66 67  68 69 6A 6B 6C 6D 6E 6F
70 71 72 73 74 75 76 77  78 79 7A 7B 7C 7D 7E 7F
80 81 82 83 84 85 86 87  88 89 8A 8B 8C 8D 8E 8F
90 91 92 93 94 95 96 97  98 99 9A 9B 9C 9D 9E 9F
A0 A1 A2 A3 A4 A5 A6 A7  A8 A9 AA AB AC AD AE AF
B0 B1 B2 B3 B4 B5 B6 B7  B8 B9 BA BB BC BD BE BF
C0 C1 C2 C3 C4 C5 C6 C7  C8 C9 CA CB CC CD CE CF
D0 D1 D2 D3 D4 D5 D6 D7  D8 D9 DA DB DC DD DE DF
E0 E1 E2 E3 E4 E5 E6 E7  E8 E9 EA EB EC ED EE EF
F0 F1 F2 F3 F4 F5 F6 F7  F8 F9 FA FB FC FD FE FF

Pascal AN61 예 (Delphi)

{ charset : EUC-KR }
program AN61Test;
{$APPTYPE CONSOLE}
uses
  SysUtils,
  AN61 in 'AN61.pas',
  Base62 in 'Base62.pas',
  ZString in 'ZString.pas';
var
  wsrc, wout : WideString ;
  wtmp, tmp0, tmp8 : string ;
  src0, out0 : AnsiString ;
  utf8, out8 : UTF8String ;
begin
  WriteLn('----------AnsiString------------') ;
  src0 := 'http://test.com:8080/an61.do?name=가나다 ㄱㄴ※'#10'可' ;  // Ansi
  WriteLn('src0[', Length(src0), ']:', src0) ;
  tmp0 := TAN61.Encode(AnsiToUtf8(src0)) ;
  WriteLn('tmp0[', Length(tmp0), ']:', tmp0) ;
  out0 := Utf8ToAnsi(TAN61.Decode(tmp0)) ;
  WriteLn('out0[', Length(out0), ']:', out0) ;
  WriteLn('src0 = out0 : ', (src0 = out0)) ;
  WriteLn('----------UTF8String----------') ;
  utf8 := AnsiToUtf8('http://test.com:8080/an61.do?name=가나다 ㄱㄴ※'#10'可') ;
  WriteLn('utf8[', Length(utf8), ']:', Utf8ToAnsi(utf8)) ;
  tmp8 := TAN61.Encode(utf8) ;
  WriteLn('tmp8[', Length(tmp8), ']:', tmp8) ;
  out8 := TAN61.Decode(tmp8) ;
  WriteLn('out8[', Length(out8), ']:', Utf8ToAnsi(out8)) ;
  WriteLn('utf8 = out8 : ', (utf8 = out8)) ;
  WriteLn('----------WideString----------') ;
  wsrc := 'http://test.com:8080/an61.do?name=가나다 ㄱㄴ※'#10'可' ;
  WriteLn('wsrc[', Length(wsrc), ']:', wsrc) ;
  wtmp := TAN61.Encode(wsrc) ;
  WriteLn('wtmp[', Length(wtmp), ']:', wtmp) ;
  wout := UTF8Decode(TAN61.Decode(wtmp)) ;
  WriteLn('wout[', Length(wout), ']:', wout) ;
  WriteLn('wsrc = wout : ', (wsrc = wout)) ;
  Writeln('----------UTF8String----------') ;
  // [ 코끼리 = Unicode : 01F418, UTF16 : D83D DC18, UTF8 : F0 9F 90 98 ]
  utf8 := UTF8Encode('http://test.com:8080/an61.do?name=가나다 ㄱㄴ※'#10'可') ;
  utf8 := utf8 + #240 ; // 0xF0 #240
  utf8 := utf8 + #159 ; // 0x9F #159
  utf8 := utf8 + #144 ; // 0x90 #144
  utf8 := utf8 + #152 ; // 0x98 #152
  //WriteLn('utf8[', Length(utf8), ']:', UTF8Decode(utf8)) ; // 코끼리 때문에 안됨.
  WriteLn('utf8[', Length(utf8), ']:', TZString.SafeUTF8Decode(utf8)) ;
  try
    tmp8 := TAN61.Encode(utf8) ;
    WriteLn('tmp8[', Length(tmp8), ']:', tmp8) ;
    out8 := TAN61.Decode(tmp8) ;
    //WriteLn('utf8[', Length(out8), ']:', UTF8Decode(out8)) ; // 코끼리 때문에 안됨.
    WriteLn('utf8[', Length(out8), ']:', TZString.SafeUTF8Decode(out8)) ;
  except
    on e: Exception do
    begin
      WriteLn('Error :', e.Message) ;
      tmp8 := TBase62.Encode(TZString.Utf8ToBytes(utf8)) ;
      Writeln('tmp8[', Length(tmp8), ']:', tmp8) ;
      out8 := TZString.BytesToUtf8(TBase62.Decode(tmp8)) ;
      //WriteLn('utf8[', Length(out8), ']:', UTF8Decode(out8)) ; // 코끼리 때문에 안됨.
      WriteLn('out8[', Length(out8), ']:', TZString.SafeUTF8Decode(out8)) ;
      WriteLn('out8 = out8 : ', (out8 = out8)) ;
    end ;
  end ;
  WriteLn('----------WideString------------') ;
  // [ 코끼리 = Unicode : 01F418, UTF16 : D83D DC18, UTF8 : F0 9F 90 98 ]
  wsrc := 'http://test.com:8080/an61.do?name=가나다 ㄱㄴ※'#10'可' ;
  wsrc := wsrc + #55357 ; // 0xD83D #55357
  wsrc := wsrc + #56344 ; // 0xDC18 #56344
  WriteLn('wsrc[', Length(wsrc), ']:', wsrc) ;
  try
    wtmp := TAN61.Encode(wsrc) ;
    WriteLn('wtmp[', Length(wtmp), ']:', wtmp) ;
    wout := UTF8Decode(TAN61.Decode(wtmp)) ;
    WriteLn('wout[', Length(wout), ']:', wout) ;
  except
    on e: Exception do
    begin
      WriteLn('Error :', e.Message) ;
      //wtmp := TBase62.Encode(TZString.StringToBytes(UTF8Encode(wsrc))) ;  // 코끼리 때문에 안됨.
      wtmp := TBase62.Encode(TZString.Utf8ToBytes(TZString.SafeUTF8Encode(wsrc))) ;
      WriteLn('wtmp[', Length(wtmp), ']:', wtmp) ;
      //wout := UTF8Decode(TZString.BytesToString(TBase62.Decode(wtmp))) ;  // 코끼리 때문에 안됨.
      wout := TZString.SafeUTF8Decode(TZString.BytesToUtf8(TBase62.Decode(wtmp))) ;
      WriteLn('wout[', Length(wout), ']:', wout) ;
      WriteLn('wsrc = wout : ', (wsrc = wout)) ;
    end ;
  end ;
  ReadLn;
end.

----------AnsiString------------
src0[50]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
tmp0[76]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
out0[50]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
src0 = out0 : TRUE
----------UTF8String----------
utf8[57]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
tmp8[76]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
out8[57]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
utf8 = out8 : TRUE
----------WideString----------
wsrc[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
wtmp[76]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
wout[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
wsrc = wout : TRUE
----------UTF8String----------
utf8[61]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可??
Error :invalid UCS2 Character
tmp8[83]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7YzIeAi2U
out8[61]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可??
out8 = out8 : TRUE
----------WideString------------
wsrc[45]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可??
Error :invalid UCS2 Character
wtmp[83]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7YzIeAi2U
wout[45]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可??
wsrc = wout : TRUE

Pascal AN61 예 (Free Pascal)

{ charset : UTF-8 }
program AN61Test;
{$APPTYPE CONSOLE}
uses
  SysUtils, AN61, ZString, Base62 ;
var
  wsrc, wout : WideString ;
  wtmp, tmp8, tmp0 : string ;
  src0, out0 : AnsiString ;
  utf8, out8 : UTF8String ;
begin
  WriteLn('----------UTF8String----------') ;
  utf8 := AnsiToUtf8(UTf8ToAnsi('http://test.com:8080/an61.do?name=가나다 ㄱㄴ※'#10'可')) ;
  WriteLn('utf8[', Length(utf8), ']:', Utf8ToAnsi(utf8)) ;
  tmp8 := TAN61.Encode(utf8) ;
  WriteLn('tmp8[', Length(tmp8), ']:', tmp8) ;
  out8 := TAN61.Decode(tmp8) ;
  WriteLn('out8[', Length(out8), ']:', Utf8ToAnsi(out8)) ;
  WriteLn('utf8 = out8 : ', (utf8 = out8)) ;
  WriteLn('----------AnsiString------------') ;
  src0 := Utf8ToAnsi('http://test.com:8080/an61.do?name=가나다 ㄱㄴ※'#10'可') ;
  WriteLn('src0[', Length(src0), ']:', src0) ;
  tmp0 := TAN61.Encode(AnsiToUtf8(src0)) ;
  WriteLn('tmp0[', Length(tmp0), ']:', tmp0) ;
  out0 := Utf8ToAnsi(TAN61.Decode(tmp0)) ;
  WriteLn('out0[', Length(out0), ']:', out0) ;
  WriteLn('src0 = out0 : ', (src0 = out0)) ;
  WriteLn('----------WideString----------') ;
  wsrc := UTF8Decode('http://test.com:8080/an61.do?name=가나다 ㄱㄴ※'#10'可') ;
  WriteLn('wsrc[', Length(wsrc), ']:', wsrc) ;
  wtmp := TAN61.Encode(wsrc) ;
  WriteLn('wtmp[', Length(wtmp), ']:', wtmp) ;
  wout := UTF8Decode(TAN61.Decode(wtmp)) ;
  WriteLn('wout[', Length(wout), ']:', wout) ;
  WriteLn('wsrc = wout : ', (wsrc = wout)) ;
  Writeln('----------UTF8String----------') ;
  // [ 코끼리 = Unicode : 01F418, UTF16 : D83D DC18, UTF8 : F0 9F 90 98 ]
  utf8 := TZString.SafeUTF8Encode(UTF8Decode('http://test.com:8080/an61.do?name=가나다 ㄱㄴ※'#10'可🐘')) ;
  WriteLn('utf8[', Length(utf8), ']:', UTF8Decode(utf8)) ;
  try
    tmp8 := TAN61.Encode(utf8) ;
    WriteLn('tmp8[', Length(tmp8), ']', tmp8) ;
    out8 := TAN61.Decode(tmp8) ;
    WriteLn('utf8[', Length(out8), ']:', UTF8Decode(out8)) ;
  except
    on e: Exception do
    begin
      WriteLn('Error :', e.Message) ;
      tmp8 := TBase62.Encode(TZString.Utf8ToBytes(utf8)) ;
      WriteLn('tmp8[', Length(tmp8), ']:', tmp8) ;
      out8 := TZString.BytesToUtf8(TBase62.Decode(tmp8)) ;
      WriteLn('out8[', Length(out8), ']:', UTF8Decode(out8)) ;
      WriteLn('utf8 = out8 : ', (utf8 = out8)) ;
    end ;
  end ;
  WriteLn('----------WideString------------') ;
  // [ 코끼리 = Unicode : 01F418, UTF16 : D83D DC18, UTF8 : F0 9F 90 98 ]
  wsrc := UTF8Decode('http://test.com:8080/an61.do?name=가나다 ㄱㄴ※'#10'可🐘') ;
  WriteLn('wsrc[', Length(wsrc), ']:', wsrc) ;
  try
    wtmp := TAN61.Encode(wsrc) ;
    WriteLn('wtmp[', Length(wtmp), ']:', wtmp) ;
    wout := TZString.StringToWideString(TAN61.Decode(wtmp), 65001) ;
    WriteLn('wout[', Length(wout), ']:', wout) ;
  except
    on e: Exception do
    begin
      WriteLn('Error :', e.Message) ;
      wtmp := TBase62.Encode(TZString.StringToBytes(UTF8Encode(wsrc))) ;
      WriteLn('wtmp[', Length(wtmp), ']:', wtmp) ;
      wout := UTF8Decode(TZString.BytesToString(TBase62.Decode(wtmp))) ;
      WriteLn('wout[', Length(wout), ']:', wout) ;
      WriteLn('wsrc = wout : ', (wsrc = wout)) ;
    end ;
  end ;
  ReadLn;
end.

----------UTF8String----------
utf8[57]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
tmp8[76]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
out8[57]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
utf8 = out8 : TRUE
----------AnsiString------------
src0[50]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
tmp0[76]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
out0[50]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
src0 = out0 : TRUE
----------WideString----------
wsrc[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
wtmp[76]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
wout[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
wsrc = wout : TRUE
----------UTF8String----------
utf8[61]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可??
Error :invalid UCS2 Character
tmp8[83]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7YzIeAi2U
out8[61]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可??
utf8 = out8 : TRUE
----------WideString------------
wsrc[45]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可??
Error :invalid UCS2 Character
wtmp[83]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7YzIeAi2U
wout[45]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可??
wsrc = wout : TRUE

PHP BASE62 예

<?php require_once 'base62.php' ?>
<!DOCTYPE html>
<html>
<body>
<code>
<?php
function toHexa(string $str) {
    $bin = unpack('C*', $str) ;
    $len = count($bin) ;
    $ret = "" ;
    for($i = 1;$i <= $len; ++$i) {
        $ret .= sprintf("%02X ", $bin[$i]) ;
        if($i % 16 == 0)
            $ret .= "\n" ;
        else if($i % 16 == 8)
            $ret .= " " ;
    }
    return $ret ;
}
try {
    $bin = "" ;
    for($i = 0; $i < 256; ++$i)
        $bin .= chr($i) ;
    printf("----\$bin[%d]----<br/>", strlen($bin)) ;
    printf("%s<br/>", nl2br(toHexa($bin))) ;
    $txt = Base62::encode($bin) ;
    printf("txt:%s<br/>", nl2br($txt)) ;
    $out = Base62::decode($txt) ;
    printf("----\$out[%d]----<br/>", strlen($out)) ;
    printf("%s<br/>", nl2br(toHexa($out))) ;
} catch(Exception $ex) {
    printf("Exception : %s<br/>", $ex->getMessage()) ;
}
?>
</code>
</body>
</html>

----$bin[256]----
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F
30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F
40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F
60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F
70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7D 7E 7F
80 81 82 83 84 85 86 87 88 89 8A 8B 8C 8D 8E 8F
90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF
B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF
C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF
E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF
F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF
txt:003x0kgb1WKF2Hws33aW3oEA4Zqn5LUR67856rki7dOM8P209Aed9vIHAguuBSYYCECCCyopDkSTEW67FHikG3MOGo02HZcfILGJJ6swJrWaKdAELOmrMAQVMv49NggmOSKQPDx4PyahQkELRVqySHUcT38GTnktUZOXVL2BW6eoWrISXcv6YOYjZACNZup1agSebS6IcDivcyMZdk0DeVcqfHGUg2t8gnWlhZAPiKn3j6Qgjr4KkcgxlOKbm9xFmuasngEWoRrApDUnpy8Rqjl5rVOisH2Mt2f0tnIduYvHvKYuw6CYwqpCxcSpyO6TzWKagzWKo7zWL2XzWLFxzWLTOz0V
----$out[256]----
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F
20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F
30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F
40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F
60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F
70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7D 7E 7F
80 81 82 83 84 85 86 87 88 89 8A 8B 8C 8D 8E 8F
90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF
B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF
C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF
E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF
F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF

PHP AN61 예

<?php require_once 'an61.php' ?>
<?php require_once 'base62.php' ?>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
</head>
<body>
<code>
<?php
try {
    $src0 = "http://test.com:8080/an61.do?name=가나다 ㄱㄴ※\n可" ;
    printf("src0[%d] : %s<br/>", strlen($src0), nl2br($src0)) ;
    $an61__tmp0 = AN61::encode($src0) ;
    printf("an61__tmp0:%s<br/>", nl2br($an61__tmp0)) ;
    $an61__out0 = AN61::decode($an61__tmp0) ;
    printf("an61__out0:%s<br/>", nl2br($an61__out0)) ;
    $base64_tmp = base64_encode($src0) ;
    printf("base64_tmp:%s<br/>", nl2br($base64_tmp)) ;
    $base64_out = base64_decode($base64_tmp) ;
    printf("base64_out:%s<br/>", nl2br($base64_out)) ;
    // [ 코끼리 = Unicode : 01F418, UTF16 : D83D DC18, UTF8 : F0 9F 90 98 ]
    $src1 = "http://test.com:8080/an61.do?name=가나다 ㄱㄴ※\n可🐘" ;
    printf("src1[%d]:%s<br/>", strlen($src1), nl2br($src1)) ;
    try {
        $tmp1 = AN61::encode($src1) ;
        printf("tmp1:%s<br/>", nl2br($tmp1)) ;
        $out1 = AN61::decode($tmp1) ;
        printf("out1:%s<br/>", nl2br($out1)) ;
    }
    catch(Exception $e) {
        printf("Exception : %s<br/>", $e->getMessage()) ;
        $tmp2 = Base62::encode($src1) ;
        printf("tmp2:%s<br/>", nl2br($tmp2)) ;
        $out2 = Base62::decode($tmp2) ;
        printf("out2:%s<br/>", nl2br($out2)) ;
        if($src1 === $out2)    echo("src1 === out2<br/>") ;
    }
} catch(Exception $ex) {
    printf("Exception : %s<br/>", $ex->getMessage()) ;
}
?>
</code>
</body>
</html>

src0[57] : http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
an61__tmp0:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
an61__out0:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
base64_tmp:aHR0cDovL3Rlc3QuY29tOjgwODAvYW42MS5kbz9uYW1lPeqwgOuCmOuLpCDjhLHjhLTigLsK5Y+v
base64_out:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
src1[61]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可🐘
Exception : invalid UCS2 character
tmp2:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7YzIeAi2U
out2:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可🐘
src1 === out2

Kotlin BASE62 예

fun bin2hexa(bin: ByteArray): String {
    val ret = StringBuilder()
    for (i in bin.indices) {
        ret.append(String.format("%02X ", bin[i]))
        when (i % 16) {
            7 -> ret.append(" ")
            15 -> ret.append("\n")
        }
    }
    if (bin.size % 16 != 0) ret.append("\n")
    return ret.toString()
}
fun main(args: Array<String>) {
    try {
        val bin = ByteArray(256)
        for (i in bin.indices) bin[i] = i.toByte()
        println("----bin[" + bin.size + "]----")
        println(bin2hexa(bin))
        val txt = Base62.encode(bin)
        println("txt[" + txt.length + "]:" + txt)
        val out = Base62.decode(txt)
        println("----out[" + out.size + "]----")
        println(bin2hexa(out))
    } catch (e: Exception) {
        e.printStackTrace()
    }
}


----bin[256]----
00 01 02 03 04 05 06 07  08 09 0A 0B 0C 0D 0E 0F 
10 11 12 13 14 15 16 17  18 19 1A 1B 1C 1D 1E 1F 
20 21 22 23 24 25 26 27  28 29 2A 2B 2C 2D 2E 2F 
30 31 32 33 34 35 36 37  38 39 3A 3B 3C 3D 3E 3F 
40 41 42 43 44 45 46 47  48 49 4A 4B 4C 4D 4E 4F 
50 51 52 53 54 55 56 57  58 59 5A 5B 5C 5D 5E 5F 
60 61 62 63 64 65 66 67  68 69 6A 6B 6C 6D 6E 6F 
70 71 72 73 74 75 76 77  78 79 7A 7B 7C 7D 7E 7F 
80 81 82 83 84 85 86 87  88 89 8A 8B 8C 8D 8E 8F 
90 91 92 93 94 95 96 97  98 99 9A 9B 9C 9D 9E 9F 
A0 A1 A2 A3 A4 A5 A6 A7  A8 A9 AA AB AC AD AE AF 
B0 B1 B2 B3 B4 B5 B6 B7  B8 B9 BA BB BC BD BE BF 
C0 C1 C2 C3 C4 C5 C6 C7  C8 C9 CA CB CC CD CE CF 
D0 D1 D2 D3 D4 D5 D6 D7  D8 D9 DA DB DC DD DE DF 
E0 E1 E2 E3 E4 E5 E6 E7  E8 E9 EA EB EC ED EE EF 
F0 F1 F2 F3 F4 F5 F6 F7  F8 F9 FA FB FC FD FE FF 
txt[348]:003x0kgb1WKF2Hws33aW3oEA4Zqn5LUR67856rki7dOM8P209Aed9vIHAguuBSYYCECCCyopDkSTEW67FHikG3MOGo02HZcfILGJJ6swJrWaKdAELOmrMAQVMv49NggmOSKQPDx4PyahQkELRVqySHUcT38GTnktUZOXVL2BW6eoWrISXcv6YOYjZACNZup1agSebS6IcDivcyMZdk0DeVcqfHGUg2t8gnWlhZAPiKn3j6Qgjr4KkcgxlOKbm9xFmuasngEWoRrApDUnpy8Rqjl5rVOisH2Mt2f0tnIduYvHvKYuw6CYwqpCxcSpyO6TzWKagzWKo7zWL2XzWLFxzWLTOz0V
----out[256]----
00 01 02 03 04 05 06 07  08 09 0A 0B 0C 0D 0E 0F 
10 11 12 13 14 15 16 17  18 19 1A 1B 1C 1D 1E 1F 
20 21 22 23 24 25 26 27  28 29 2A 2B 2C 2D 2E 2F 
30 31 32 33 34 35 36 37  38 39 3A 3B 3C 3D 3E 3F 
40 41 42 43 44 45 46 47  48 49 4A 4B 4C 4D 4E 4F 
50 51 52 53 54 55 56 57  58 59 5A 5B 5C 5D 5E 5F 
60 61 62 63 64 65 66 67  68 69 6A 6B 6C 6D 6E 6F 
70 71 72 73 74 75 76 77  78 79 7A 7B 7C 7D 7E 7F 
80 81 82 83 84 85 86 87  88 89 8A 8B 8C 8D 8E 8F 
90 91 92 93 94 95 96 97  98 99 9A 9B 9C 9D 9E 9F 
A0 A1 A2 A3 A4 A5 A6 A7  A8 A9 AA AB AC AD AE AF 
B0 B1 B2 B3 B4 B5 B6 B7  B8 B9 BA BB BC BD BE BF 
C0 C1 C2 C3 C4 C5 C6 C7  C8 C9 CA CB CC CD CE CF 
D0 D1 D2 D3 D4 D5 D6 D7  D8 D9 DA DB DC DD DE DF 
E0 E1 E2 E3 E4 E5 E6 E7  E8 E9 EA EB EC ED EE EF 
F0 F1 F2 F3 F4 F5 F6 F7  F8 F9 FA FB FC FD FE FF

Kotlin AN61 예

import java.io.UnsupportedEncodingException
import java.util.*
fun main(args: Array<String>) {
    try {
        val src0 = "http://test.com:8080/an61.do?name=가나다 ㄱㄴ※\n可"
        println("src0[" + src0.length + "]:" + src0)
        val an61__tmp0: String = AN61.encode(src0)
        println("an61__tmp0[" + an61__tmp0.length + "]:" + an61__tmp0)
        val an61__out0: String = AN61.decode(an61__tmp0)
        println("an61__out0[" + an61__out0.length + "]:" + an61__out0)
        println("src0.equals(an61__out0) : " + (src0 == an61__out0))
        val base64_tmp = Base64.getEncoder().encodeToString(src0.toByteArray(charset("utf8")))
        println("base64_tmp[" + base64_tmp.length + "]:" + base64_tmp)
        val base64_out = String(Base64.getDecoder().decode(base64_tmp), charset("utf8"))
        println("base64_out[" + base64_out.length + "]:" + base64_out)
        // [ 코끼리 = Unicode : 01F418, UTF16 : D83D DC18, UTF8 : F0 9F 90 98 ]
        val src1 = "http://test.com:8080/an61.do?name=가나다 ㄱㄴ※\n可🐘" // UnsupportedEncodingException이 발생하는 경우
        println("src1[" + src1.length + "]:" + src1) // String.length()은 문자갯수가 아니라, UTF16의 길이다.
        try {
            val tmp1: String = AN61.encode(src1)
            println("tmp1:$tmp1")
            val out1: String = AN61.decode(tmp1)
            println("out1:$out1")
        } catch (uee: UnsupportedEncodingException) {
            System.err.println(uee)
            val tmp2: String = Base62.encode(src1.toByteArray(charset("utf8")))
            println("tmp2[" + tmp2.length + "]:" + tmp2)
            val out2 = String(Base62.decode(tmp2), charset("utf8"))
            println("out2[" + out2.length + "]:" + out2)
            println("src1.equals(out2) : " + (src1 == out2))
        }
    } catch (e: Exception) {
        e.printStackTrace()
    }
}

src0[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
an61__tmp0[76]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7Y
an61__out0[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
src0.equals(an61__out0) : true
base64_tmp[76]:aHR0cDovL3Rlc3QuY29tOjgwODAvYW42MS5kbz9uYW1lPeqwgOuCmOuLpCDjhLHjhLTigLsK5Y+v
base64_out[43]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可
src1[45]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可🐘
tmp2[83]:QVOZSTTLC33NTIeJPEfTElRKEFxJOid7CTUTSEKmOiZwFiOXWiaIco6jfdmdXfmjXfyWWfSTwG7YzIeAi2U
out2[45]:http://test.com:8080/an61.do?name=가나다 ㄱㄴ※
可🐘
src1.equals(out2) : true
java.io.UnsupportedEncodingException: invalid UCS2 character index 43 🐘