jscript + charCodeAt, how to set js encoding?

VK wrote:

On Feb 3, 8:16 pm, Thomas 'PointedEars' Lahn <PointedE... (AT) web (DOT) de
wrote:
VK wrote:
Javascript operates only and exclusively with Unicode (note UTF-8) but
Unicode itself.
That is incoherent gibberish, and qualifies as nonsense.
Oh com'on, these are really ground basics.
*These* are not, because what you said is nonsense at best.

What exactly you did not understand in my explanations?

There is nothing to be understood where there is no meaning.
Someone should force you to read the nonsense that you post.


PointedEars
--
var bugRiddenCrashPronePieceOfJunk = (
navigator.userAgent.indexOf('MSIE 5') != -1
&& navigator.userAgent.indexOf('Mac') != -1
) // Plone, register_function.js:16

czechboy <oldrich.svec (AT) gmail (DOT) com> writes:

To explain it in more detail. There is a javascript SDK plug-in in
FARR ( http://www.donationcoder.com/Forums/...?topic=11804.0
). It uses Microsoft scripting host to interpret javascript. I would
like to display unicode result (russian, greek etc) as RTF1 which
means that I have to convert ěš�řž etc. to its decimal interpretation
by charCodeAt. So when I call the charCodeAt for the letter "�" the
SDK displays 356 but it should be 269.

I would expect MS jscript to do something as basic as charcodeat
correctly. My implementation (firefox) correctly gives 268 (0x10c) for
"Č". In any case it's more likely that the text is wrongly converted
somewhere before it reaches the script (i.e. converted from an encoding
that it's not in fact in).

Do you think there might be an
error in the javascript SDK plug-in?

Could be. From your URL it appears that the host isn't unicode
aware.

And concerning the function. It is what I have found on the internet.
I an javascript newbie

Don't use it. it's incorrect.

Joost.

On 3 Ún, 19:15, Joost Diepenmaat <jo... (AT) zeekat (DOT) nl> wrote:

czechboy <oldrich.s... (AT) gmail (DOT) com> writes:
To explain it in more detail. There is a javascript SDK plug-in in
FARR (http://www.donationcoder.com/Forums/...?topic=11804.0
). It uses Microsoft scripting host to interpret javascript. I would
like to display unicode result (russian, greek etc) as RTF1 which
means that I have to convert ì¹èø¾ etc. to its decimal interpretation
by charCodeAt. So when I call the charCodeAt for the letter "è" the
SDK displays 356 but it should be 269.

I would expect MS jscript to do something as basic as charcodeat
correctly. My implementation (firefox) correctly gives 268 (0x10c) for
"È". In any case it's more likely that the text is wrongly converted
somewhere before it reaches the script (i.e. converted from an encoding
that it's not in fact in).

Do you think there might be an
error in the javascript SDK plug-in?

Could be. From your URL it appears that the host isn't unicode
aware.

And concerning the function. It is what I have found on the internet.
I an javascript newbie

Don't use it. it's incorrect.

Joost.

Thank you for your help. Now it is working. Could you please post me
correct function? I am not that skilled to do one by myself Thank
you

Joost Diepenmaat wrote:

charCodeAt already returns the unicode codepoint and strings in
javascript are unicode. The conversion to and from other encodings is
presumably handled by the scripting host (i.e. the browser).

Yes, and more specifically, by the character set of the web page.

<textarea>éè</textarea>

returns under

Western European, charset=iso-8859-1: 233 and 232
Central European, charset=iso-8859-2: 233 and 269
Eastern European, charset=iso-8859-5: 1097 and 1096
Russian, charset=KOI8-R: 1048 and 1061

But the real fun starts with multibyte-sequences (saved under ANSI,
not UTF-8):

Japanese, charset=shift-jis: 40167 (one character)
Trad. Chinese, charset=big5: 27654 (one character)

--
Bart

czechboy <oldrich.svec (AT) gmail (DOT) com> writes:

Thank you for your help. Now it is working. Could you please post me
correct function? I am not that skilled to do one by myself Thank
you

I think Thomas already posted a correction to the function in this
thread. Look it up.

Joost.

On 4 Ún, 11:16, Joost Diepenmaat <jo... (AT) zeekat (DOT) nl> wrote:

czechboy <oldrich.s... (AT) gmail (DOT) com> writes:
Thank you for your help. Now it is working. Could you please post me
correct function? I am not that skilled to do one by myself Thank
you

I think Thomas already posted a correction to the function in this
thread. Look it up.

Joost.

Thanks. Meanwhile I have found another function which seams to work
fine. Is it the correct function?

(function(){

var unicode = {

/**
*
*
*/
'dec2hex' : function(ts)
{
return (ts+0).toString(16).toUpperCase();
},


/**
*
*
*/
'dec2hex2' : function(ts)
{
var hexequiv = new Array ("0", "1", "2", "3", "4", "5", "6", "7",
"8", "9", "A", "B", "C", "D", "E", "F");
return hexequiv[(ts >> 4) & 0xF] + hexequiv[ts & 0xF];
},


/**
*
*
*/
'dec2hex4' : function(ts)
{
var hexequiv = new Array ("0", "1", "2", "3", "4", "5", "6", "7",
"8", "9", "A", "B", "C", "D", "E", "F");
return hexequiv[(ts >> 12) & 0xF] + hexequiv[(ts >> 8) & 0xF] +
hexequiv[(ts >> 4) & 0xF] + hexequiv[ts & 0xF];
},


/**
*
*
*/
'convertCP2Char' : function(ts)
{
var outputString = '';
ts = ts.replace(/^\s+/, '');
if(ts.length == 0)
return "";
ts = ts.replace(/\s+/g, ' ');
var listArray = ts.split(' ');
for(var i = 0; i < listArray.length; i++)
{
var n = parseInt(listArray[i], 16);
if(n <= 0xFFFF)
outputString += String.fromCharCode(n);
else if (n <= 0x10FFFF)
{
n -= 0x10000;
outputString += String.fromCharCode(0xD800 | (n >> 10)) +
String.fromCharCode(0xDC00 | (n & 0x3FF));
}
else
outputString += '!erreur ' + unicode.dec2hex(n) +'!';
}
return( outputString );
},


/**
*
*
*/
'convertCP2DecNCR' : function(ts)
{
var outputString = "";
ts = ts.replace(/^\s+/, '');
if(ts.length == 0)
return "";
ts = ts.replace(/\s+/g, ' ');
var listArray = ts.split(' ');
for(var i = 0; i < listArray.length; i++)
{
var n = parseInt(listArray[i], 16);
outputString += ('{\\u' + n + '}');
}
return(outputString);
},


/**
*
*
*/
'convertChar2CP' : function(ts)
{
var outputString = "", haut = 0, n = 0;
for(var i = 0; i < ts.length; i++)
{
var b = ts.charCodeAt(i);
if(b < 0 || b > 0xFFFF)
outputString += '!erreur ' + unicode.dec2hex(b) + '!';

if(haut != 0)
{
if(0xDC00 <= b && b <= 0xDFFF)
{
outputString += unicode.dec2hex(0x10000 + ((haut - 0xD800) <<
10) + (b - 0xDC00)) + ' ';
haut = 0;
continue;
}
else
{
outputString += '!erreur ' + unicode.dec2hex(haut) + '!';
haut = 0;
}
}

if(0xD800 <= b && b <= 0xDBFF)
haut = b;
else
outputString += unicode.dec2hex(b) + ' ';
}
return( outputString.replace(/ $/, '') );
},


/**
*
*
*/
'convertDecNCR2CP' : function(ts)
{
var outputString = '';
ts = ts.replace(/\s/g, '');
var listArray = ts.split(';');
for (var i = 0; i < listArray.length-1; i++)
{
if(i > 0)
outputString += ' ';
var n = parseInt(listArray[i].substring(2, listArray[i].length),
10);
outputString += unicode.dec2hex(n);
}
return( outputString );
}

};


/**
* Convert Character to Decimal.
*
* @example "JavaScript".char2dec();
* @result "JavaScript"
*
* @name char2dec
* @return String
*/
if(!String.prototype.char2dec)
String.prototype.char2dec = function()
{
return unicode.convertCP2DecNCR(unicode.convertChar2CP(th is));
};


/**
* Convert Decimal to Character.
*
* @example
"JavaScript".dec2char();
* @result "JavaScript"
*
* @name dec2char
* @return String
*/
if(!String.prototype.dec2char)
String.prototype.dec2char = function()
{
return unicode.convertCP2Char(unicode.convertDecNCR2CP(th is));
};

})();