JavaScript convert_uuencode

uuencode a string

function convert_uuencode (str){
    // uuencode a string  
    // 
    // version: 1008.1718
    // discuss at: http://phpjs.org/functions/convert_uuencode    // +   original by: Ole Vrijenhoek
    // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   reimplemented by: Ole Vrijenhoek
    // +   bugfixed by: Brett Zamir (http://brett-zamir.me)
    // -    depends on: is_scalar    // *     example 1: convert_uuencode("test\ntext text\r\n");
    // *     returns 1: '0=&5S=`IT97AT('1E>'0-"@``'
    // shortcut
    var chr = function (c) {
        return String.fromCharCode(c);    };
 
    if (!str || str=="") {
        return chr(0);
    } else if (!this.is_scalar(str)) {        return false;
    }
 
    var c = 0, u = 0, i = 0, a = 0;
    var encoded = "", tmp1 = "", tmp2 = "", bytes = {}; 
    // divide string into chunks of 45 characters
    var chunk = function () {
        bytes = str.substr(u, 45);
        for (i in bytes) {            bytes[i] = bytes[i].charCodeAt(0);
        }
        if (bytes.length != 0) {
            return bytes.length;
        } else {            return 0;
        }
    };
 
    while (chunk() !== 0) {        c = chunk();
        u += 45;
 
        // New line encoded data starts with number of bytes encoded.
        encoded += chr(c+32); 
        // Convert each char in bytes[] to a byte
        for (i in bytes) {
            tmp1 = bytes[i].charCodeAt(0).toString(2);
            while (tmp1.length < 8) {                tmp1 = "0" + tmp1;
            }
            tmp2 += tmp1;
        }
         while (tmp2.length % 6) {
            tmp2 = tmp2 + "0";
        }
 
        for (i=0; i<=(tmp2.length/6)-1; i++) {            tmp1 = tmp2.substr(a, 6);
            if (tmp1 == "000000") {
                encoded += chr(96);
            } else {
                encoded += chr(parseInt(tmp1, 2)+32);            }
            a += 6;
        }
        a = 0;
        tmp2 = "";        encoded += "\n";
    }
 
    // Add termination characters
    encoded += chr(96)+"\n"; 
    return encoded;
}

external links: original PHP docs | raw js source

Examples

Running

1	convert_uuencode("test\ntext text\r\n");

Should return

1	'0=&5S=`IT97AT('1E>'0-"@``'

Dependencies

In order to use this function, you also need:

is_scalar

Open syntax issues

php.js uses JsLint to help us keep our code consistent and prevent some common bugs.

Eventually we want all code to pass or at least take into consideration most fixes suggested by JsLint, following this JsLint configuration we’ve decided on.

Authors

Thanks to the following developers, you get to have convert_uuencode goodness in JavaScript.

Ole Vrijenhoek ( original reimplemented )
Kevin van Zonneveld ( bugfixed )
Brett Zamir ( bugfixed )

Comments

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Use:

[CODE]
your_stuff('here');
[/CODE]

for proper code formatting
By submitting code here you are allowing us to use it in php.js hence dual licensing it under the MIT and GPL licenses

Ole Vrijenhoek
26 Apr '09

hm, found a bug XD

function convert_uuencode(str){

    // shortcut
    var char = function(c) {
        return String.fromCharCode(c);
    };

    if(!str || str=="") {
        return char(0);
    } else if(!is_scalar(str)) {
        return false;
    }

    var c = 0, u = 0, i = 0, a = 0
    var encoded = "", tmp1 = "", tmp2 = "", bytes = {};

    // divide string into chunks of 45 characters
    var chunk = function() {
        bytes = str.substr(u, 45);
        for(i in bytes) {
            bytes[i] = bytes[i].charCodeAt(0);
        }
        if(bytes.length != 0) {
            return bytes.length;
        } else {
            return 0;
        }
    };
        
    while(chunk() !== 0) {
        c = chunk();
        u += 45;

        // New line encoded data starts with number of bytes encoded.
        encoded += char(c+32);

        // Convert each char in bytes[] to a byte
        for(i in bytes) {
            tmp1 = bytes[i].charCodeAt(0).toString(2);
            while(tmp1.length < 8) {
                tmp1 = "0" + tmp1;
            }
            tmp2 += tmp1;
        }

        while(tmp2.length % 6) {
            tmp2 = tmp2 + "0";
        }

        for(i=0; i<=(tmp2.length/6)-1; i++) {
            tmp1 = tmp2.substr(a, 6);
            if(tmp1 == "000000") {
                encoded += char(96);
            } else {
                encoded += char(parseInt(tmp1, "2")+32);
            }
            a += 6;
        }
        a = 0, tmp2 = "";
        encoded += "\n";
    }
        
    // Add termination characters
    encoded += char(96)+"\n";

    return encoded;
}

Ole Vrijenhoek
25 Apr '09

I did some reaearch for this function,
in php it uses linebreaks and stuff...
I fixed it with this function

// author: Ole Vrijenhoek
// sources: http://www.herongyang.com/encoding/UUEncode-PHP-Implementation.html
//          http://en.wikipedia.org/wiki/Uuencode
// depends on is_scalar()

function convert_uuencode(str){

        // shortcut
        var char = function(c) {
            return String.fromCharCode(c);
        };

        if(!str || str=="") {
            return char(0);
        } else if(!is_scalar(str)) {
            return false;
        }

        var c = 0, u = 0, i = 0, a = 0
        var encoded = "", tmp1 = "", tmp2 = "", bytes = {}, b = {};
        var b0 = 0, b1 = 0, b2 = 0, b3 = 0;

        // divide string into chunks of 45 characters
        var chunk = function() {
            bytes = str.substr(u, 45);
            for(i in bytes) {
                bytes[i] = bytes[i].charCodeAt(0);
            }
            if(bytes.length != 0) {
                return bytes.length;
            } else {
                return 0;
            }
        };
        
        while(chunk() !== 0) {
            c = chunk();
            u += 45;

            while(c % 3) {
                bytes[c++] = char(0);
            }

            // New line encoded data starts with number of bytes encoded.
            encoded += char(c+32);

            // Convert each char in bytes[] to a byte
            for(i in bytes) {
                tmp1 = bytes[i].charCodeAt(0).toString(2);
                while(tmp1.length < 8) {
                    tmp1 = "0" + tmp1;
                }
                tmp2 += tmp1;
            }

            for(i=0; i<=(tmp2.length/6)-1; i++) {
                tmp1 = tmp2.substr(a, 6);
                if(tmp1 == "000000") {
                    encoded += char(96);
                } else {
                    encoded += char(parseInt(tmp1, "2")+32);
                }
                a += 6;
            }

            encoded += "\n";
        }
        
    // Add termination characters
    encoded += char(96)+"\n";

    return encoded;
}

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