[dart-misc] How to manually convert between Latin-5 and Unicode code points?

[Niyazi Toros]

I have socket connection and I can get data from my socket. The data
encoded as Latin-5.


_xCustomerName = 

 // will get data from socket like: “879255:_:NÝYAZÝ
TOROS”


_xCustomerName.replaceAll(new RegExp(r'Ý'), 'İ');


An seems it doesnt replace the 'Ý' to ‘İ’.



How to manually convert between Latin-5 and Unicode code points?

['William Hesse' via Dart Misc]

The String.replaceAll function does not modify the string it is called on,
it returns a new String object with the modifications.

The best way to change a string from Latin5 to Unicode would be to
implement a Latin5 encoder/decoder using the classes in dart:convert.
This would map from a byte string to a String. It is a bit difficult,
though.

Post by Niyazi Toros
I have socket connection and I can get data from my socket. The data
encoded as Latin-5.
_xCustomerName = 

 // will get data from socket like: “879255:_:NÝYAZÝ
TOROS”
_xCustomerName.replaceAll(new RegExp(r'Ý'), 'İ');
An seems it doesnt replace the 'Ý' to ‘İ’.
How to manually convert between Latin-5 and Unicode code points?
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[Niyazi Toros]

Thanks William, Where I can get information so I can start implementing
Latin5 encoder/decoder.
I need some example that implements Latin? encoder/decoder. It seems Dart
only supports Latin1.

I need to write my own classes, but I don't know where to start.

And secondly does dart has any character replacement option like other
language?

[Niyazi Toros]

I know the Latin 1 and Latin 5 differences. So I just create a switch loop
and now I can get the character that I wanted.

So the “879255:_:NÝYAZÝ TOROS” becomes “879255:_:NİYAZİ TOROS”

_xCustomerName.runes.forEach((int rune) {
var character = new String.fromCharCode(rune);
switch (character) {
case 'Ð':
character = 'Ğ';
break;
case 'Ý':
character = 'Ä°';
break;
case 'Þ':
character = 'Ş';
break;
case 'ð':
character = 'ğ';
break;
case 'Ü':
character = 'ı';
break;
case 'ß':
character = 'ş';
break;
}

_xCustomerNameTurkish = _xCustomerNameTurkish + character;
});
print(_xCustomerNameTurkish);

['William Hesse' via Dart Misc]

That is a good, simple solution. You could use a StringBuffer to be more
efficient, so:

var correctName = new StringBuffer();

(in loop)
correctName.write(character);

(at end)
var turkishName = correctName.toString();


You could also use ReplaceAll:
correctName = correctName
.replaceAll( 'ß', 'ş')
.replaceAll( 'Ü', 'ı')
.replaceAll( 'ð', 'ğ')
...

Post by Niyazi Toros
I know the Latin 1 and Latin 5 differences. So I just create a switch loop
and now I can get the character that I wanted.
So the “879255:_:NÝYAZÝ TOROS” becomes “879255:_:NİYAZİ TOROS”
_xCustomerName.runes.forEach((int rune) {
var character = new String.fromCharCode(rune);
switch (character) {
character = 'Ğ';
break;
character = 'Ä°';
break;
character = 'Ş';
break;
character = 'ğ';
break;
character = 'ı';
break;
character = 'ş';
break;
}
_xCustomerNameTurkish = _xCustomerNameTurkish + character;
});
print(_xCustomerNameTurkish);
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[Niyazi Toros]

Thanks William, I will do it. Kind Regards

['William Hesse' via Dart Misc]

Also, since you are only changing characters in the basic plane (16-bit
chars), you could just loop over the code points as characters:
The only different between this and runes.forEach and turning code points
to strings is that you would get non-basic plane characters
as two surrogate pair characters, which your loop passes through unchanged.

for (int i=0; i < oldName.length; ++i) {
String char = oldName[i];
switch (char) {
...

Post by Niyazi Toros
Thanks William, I will do it. Kind Regards
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[Niyazi Toros]

Thanks William, I will try it.