7-bit GSM 03.38 <-> Unicode Map in JS

example.js

// Unicode to 7-bit GSM
var write = "Hello, Faisalman!";
var msgSubmit = "";
write.split('').forEach(function(i) {
    msgSubmit += parseInt(Unicode2GSM[i], 10).toString(16).toUpperCase() + " ";
});
console.log(msgSubmit);     // "48 65 6C 6C 6F 2C 20 46 61 69 73 61 6C 6D 61 6E 21 "

// 7-bit GSM to Unicode
var read = "48 65 6C 6C 6F 2C 20 46 61 69 73 61 6C 6D 61 6E 21 ";
var msgReceived = "";
read.split(" ").forEach(function(i) { 
    msgReceived += (i !== "") ? GSM2Unicode[parseInt(i, 16)] : "";
});
console.log(msgReceived);   // "Hello, Faisalman!"

gsm-unicode.js

/**
 *  Convert From/To GSM03.38/Unicode in JavaScript
 *  Mapping source: ftp://ftp.unicode.org/Public/MAPPINGS/ETSI/GSM0338.TXT
 *  https://gist.github.com/faisalman
 *
 *  Copyright 2013, Faisalman <[email protected]>
 *  Licensed under The MIT License
 *  http://www.opensource.org/licenses/mit-license
 */

var GSM2Unicode = {
    0x00 : "\u0040",    // COMMERCIAL AT
    0x01 : "\u00A3",    // POUND SIGN
    0x02 : "\u0024",    // DOLLAR SIGN
    0x03 : "\u00A5",    // YEN SIGN
    0x04 : "\u00E8",    // LATIN SMALL LETTER E WITH GRAVE
    0x05 : "\u00E9",    // LATIN SMALL LETTER E WITH ACUTE
    0x06 : "\u00F9",    // LATIN SMALL LETTER U WITH GRAVE
    0x07 : "\u00EC",    // LATIN SMALL LETTER I WITH GRAVE
    0x08 : "\u00F2",    // LATIN SMALL LETTER O WITH GRAVE
    0x09 : "\u00E7",    // LATIN SMALL LETTER C WITH CEDILLA
    0x0A : "\u000A",    // LINE FEED
    0x0B : "\u00D8",    // LATIN CAPITAL LETTER O WITH STROKE
    0x0C : "\u00F8",    // LATIN SMALL LETTER O WITH STROKE
    0x0D : "\u000D",    // CARRIAGE RETURN
    0x0E : "\u00C5",    // LATIN CAPITAL LETTER A WITH RING ABOVE
    0x0F : "\u00E5",    // LATIN SMALL LETTER A WITH RING ABOVE
    0x10 : "\u0394",    // GREEK CAPITAL LETTER DELTA
    0x11 : "\u005F",    // LOW LINE
    0x12 : "\u03A6",    // GREEK CAPITAL LETTER PHI
    0x13 : "\u0393",    // GREEK CAPITAL LETTER GAMMA
    0x14 : "\u039B",    // GREEK CAPITAL LETTER LAMDA
    0x15 : "\u03A9",    // GREEK CAPITAL LETTER OMEGA
    0x16 : "\u03A0",    // GREEK CAPITAL LETTER PI
    0x17 : "\u03A8",    // GREEK CAPITAL LETTER PSI
    0x18 : "\u03A3",    // GREEK CAPITAL LETTER SIGMA
    0x19 : "\u0398",    // GREEK CAPITAL LETTER THETA
    0x1A : "\u039E",    // GREEK CAPITAL LETTER XI
    0x1B : "\u00A0",    // ESCAPE TO EXTENSION TABLE
    0x1C : "\u00C6",    // LATIN CAPITAL LETTER AE
    0x1D : "\u00E6",    // LATIN SMALL LETTER AE
    0x1E : "\u00DF",    // LATIN SMALL LETTER SHARP S (German)
    0x1F : "\u00C9",    // LATIN CAPITAL LETTER E WITH ACUTE
    0x20 : "\u0020",    // SPACE
    0x21 : "\u0021",    // EXCLAMATION MARK
    0x22 : "\u0022",    // QUOTATION MARK
    0x23 : "\u0023",    // NUMBER SIGN
    0x24 : "\u00A4",    // CURRENCY SIGN
    0x25 : "\u0025",    // PERCENT SIGN
    0x26 : "\u0026",    // AMPERSAND
    0x27 : "\u0027",    // APOSTROPHE
    0x28 : "\u0028",    // LEFT PARENTHESIS
    0x29 : "\u0029",    // RIGHT PARENTHESIS
    0x2A : "\u002A",    // ASTERISK
    0x2B : "\u002B",    // PLUS SIGN
    0x2C : "\u002C",    // COMMA
    0x2D : "\u002D",    // HYPHEN-MINUS
    0x2E : "\u002E",    // FULL STOP
    0x2F : "\u002F",    // SOLIDUS
    0x30 : "\u0030",    // DIGIT ZERO
    0x31 : "\u0031",    // DIGIT ONE
    0x32 : "\u0032",    // DIGIT TWO
    0x33 : "\u0033",    // DIGIT THREE
    0x34 : "\u0034",    // DIGIT FOUR
    0x35 : "\u0035",    // DIGIT FIVE
    0x36 : "\u0036",    // DIGIT SIX
    0x37 : "\u0037",    // DIGIT SEVEN
    0x38 : "\u0038",    // DIGIT EIGHT
    0x39 : "\u0039",    // DIGIT NINE
    0x3A : "\u003A",    // COLON
    0x3B : "\u003B",    // SEMICOLON
    0x3C : "\u003C",    // LESS-THAN SIGN
    0x3D : "\u003D",    // EQUALS SIGN
    0x3E : "\u003E",    // GREATER-THAN SIGN
    0x3F : "\u003F",    // QUESTION MARK
    0x40 : "\u00A1",    // INVERTED EXCLAMATION MARK
    0x41 : "\u0041",    // LATIN CAPITAL LETTER A
    0x42 : "\u0042",    // LATIN CAPITAL LETTER B
    0x43 : "\u0043",    // LATIN CAPITAL LETTER C
    0x44 : "\u0044",    // LATIN CAPITAL LETTER D
    0x45 : "\u0045",    // LATIN CAPITAL LETTER E
    0x46 : "\u0046",    // LATIN CAPITAL LETTER F
    0x47 : "\u0047",    // LATIN CAPITAL LETTER G
    0x48 : "\u0048",    // LATIN CAPITAL LETTER H
    0x49 : "\u0049",    // LATIN CAPITAL LETTER I
    0x4A : "\u004A",    // LATIN CAPITAL LETTER J
    0x4B : "\u004B",    // LATIN CAPITAL LETTER K
    0x4C : "\u004C",    // LATIN CAPITAL LETTER L
    0x4D : "\u004D",    // LATIN CAPITAL LETTER M
    0x4E : "\u004E",    // LATIN CAPITAL LETTER N
    0x4F : "\u004F",    // LATIN CAPITAL LETTER O
    0x50 : "\u0050",    // LATIN CAPITAL LETTER P
    0x51 : "\u0051",    // LATIN CAPITAL LETTER Q
    0x52 : "\u0052",    // LATIN CAPITAL LETTER R
    0x53 : "\u0053",    // LATIN CAPITAL LETTER S
    0x54 : "\u0054",    // LATIN CAPITAL LETTER T
    0x55 : "\u0055",    // LATIN CAPITAL LETTER U
    0x56 : "\u0056",    // LATIN CAPITAL LETTER V
    0x57 : "\u0057",    // LATIN CAPITAL LETTER W
    0x58 : "\u0058",    // LATIN CAPITAL LETTER X
    0x59 : "\u0059",    // LATIN CAPITAL LETTER Y
    0x5A : "\u005A",    // LATIN CAPITAL LETTER Z
    0x5B : "\u00C4",    // LATIN CAPITAL LETTER A WITH DIAERESIS
    0x5C : "\u00D6",    // LATIN CAPITAL LETTER O WITH DIAERESIS
    0x5D : "\u00D1",    // LATIN CAPITAL LETTER N WITH TILDE
    0x5E : "\u00DC",    // LATIN CAPITAL LETTER U WITH DIAERESIS
    0x5F : "\u00A7",    // SECTION SIGN
    0x60 : "\u00BF",    // INVERTED QUESTION MARK
    0x61 : "\u0061",    // LATIN SMALL LETTER A
    0x62 : "\u0062",    // LATIN SMALL LETTER B
    0x63 : "\u0063",    // LATIN SMALL LETTER C
    0x64 : "\u0064",    // LATIN SMALL LETTER D
    0x65 : "\u0065",    // LATIN SMALL LETTER E
    0x66 : "\u0066",    // LATIN SMALL LETTER F
    0x67 : "\u0067",    // LATIN SMALL LETTER G
    0x68 : "\u0068",    // LATIN SMALL LETTER H
    0x69 : "\u0069",    // LATIN SMALL LETTER I
    0x6A : "\u006A",    // LATIN SMALL LETTER J
    0x6B : "\u006B",    // LATIN SMALL LETTER K
    0x6C : "\u006C",    // LATIN SMALL LETTER L
    0x6D : "\u006D",    // LATIN SMALL LETTER M
    0x6E : "\u006E",    // LATIN SMALL LETTER N
    0x6F : "\u006F",    // LATIN SMALL LETTER O
    0x70 : "\u0070",    // LATIN SMALL LETTER P
    0x71 : "\u0071",    // LATIN SMALL LETTER Q
    0x72 : "\u0072",    // LATIN SMALL LETTER R
    0x73 : "\u0073",    // LATIN SMALL LETTER S
    0x74 : "\u0074",    // LATIN SMALL LETTER T
    0x75 : "\u0075",    // LATIN SMALL LETTER U
    0x76 : "\u0076",    // LATIN SMALL LETTER V
    0x77 : "\u0077",    // LATIN SMALL LETTER W
    0x78 : "\u0078",    // LATIN SMALL LETTER X
    0x79 : "\u0079",    // LATIN SMALL LETTER Y
    0x7A : "\u007A",    // LATIN SMALL LETTER Z
    0x7B : "\u00E4",    // LATIN SMALL LETTER A WITH DIAERESIS
    0x7C : "\u00F6",    // LATIN SMALL LETTER O WITH DIAERESIS
    0x7D : "\u00F1",    // LATIN SMALL LETTER N WITH TILDE
    0x7E : "\u00FC",    // LATIN SMALL LETTER U WITH DIAERESIS
    0x7F : "\u00E0"     // LATIN SMALL LETTER A WITH GRAVE
};

var Unicode2GSM = (function() {
    var map = {};
    for(var i in GSM2Unicode) {
        map[GSM2Unicode[i]] = i;
    }
    return map;
})();

Nice, but it doesn't cover {} [] ~ € characters. They take two bytes in GSM charset, not one.

$dict = array(
'@' => "\x00", '£' => "\x01", '$' => "\x02", '¥' => "\x03", 'è' => "\x04", 'é' => "\x05", 'ù' => "\x06", 'ì' => "\x07", 'ò' => "\x08", 'Ç' => "\x09", 'Ø' => "\x0B", 'ø' => "\x0C", 'Å' => "\x0E", 'å' => "\x0F",
'Δ' => "\x10", '_' => "\x11", 'Φ' => "\x12", 'Γ' => "\x13", 'Λ' => "\x14", 'Ω' => "\x15", 'Π' => "\x16", 'Ψ' => "\x17", 'Σ' => "\x18", 'Θ' => "\x19", 'Ξ' => "\x1A", 'Æ' => "\x1C", 'æ' => "\x1D", 'ß' => "\x1E", 'É' => "\x1F",
// all \x2? removed
// all \x3? removed
// all \x4? removed
'Ä' => "\x5B", 'Ö' => "\x5C", 'Ñ' => "\x5D", 'Ü' => "\x5E", '§' => "\x5F",
'¿' => "\x60",
'ä' => "\x7B", 'ö' => "\x7C", 'ñ' => "\x7D", 'ü' => "\x7E", 'à' => "\x7F",
'^' => "\x1B\x14", '{' => "\x1B\x28", '}' => "\x1B\x29", '\' => "\x1B\x2F", '[' => "\x1B\x3C", '~' => "\x1B\x3D", ']' => "\x1B\x3E", '|' => "\x1B\x40", '€' => "\x1B\x65"
);