Re: Localization: example from document page doesn't work for latin characters ?

[Jan Pfeifer <pfjan at yahoo dot com dot br>]

Thanks for the answer :). I tried the C version as well, and it displays
the same problem. I didn't know that the stdc++ used the libc
implementation for these localization issues.

I'll ask about this in gcc-help.

- jan

ps.: attached is the edited file with the C version. Btw, I'm compiling
with gcc (GCC) 4.0.2 20050808 (prerelease).

Paolo Carlini wrote:

>Jan Pfeifer wrote:
>
>  
>
>>Am I missing something, or is there something missing in the library ?
>> 
>>
>>    
>>
>Well, I don't have ready at hand the locale at issue, sorry, but in such
>cases, for debugging purposes I would recommend preparing first a simple
>pure C equivalent (that is, using just setlocale & toupper / tolower)
>and see what happens. Consider that for such facilities the C++ library
>is mostly calling into the underlying libc facilities and skipping some
>steps often makes the issue much simpler to understand.
>
>Paolo.
>  
>

#include <iostream>
#include <iterator>    // for back_inserter
#include <locale>
#include <string>
#include <algorithm>
#include <cctype>      // old <ctype.h>

using namespace std;

struct MyToUpper
{
	MyToUpper(std::locale const& l) : loc(l) {;}
	char operator() (char c) const  { return std::toupper(c,loc); }
	private:
		std::locale const& loc;
};
   
struct MyToLower
{
	MyToLower(std::locale const& l) : loc(l) {;}
	char operator() (char c) const  { return std::tolower(c,loc); }
	private:
		std::locale const& loc;
};


int main(int argc, char** argv)
{
	// locale loc( "" );
	// locale loc( "en_US.UTF-8" );
	locale loc( "pt_BR.UTF-8" );
	MyToUpper up( loc );
	MyToLower down( loc );

	cout << "C++ version: " << endl;
	const char *reference = "�rfão";
	string normal = reference; 
	cout << normal << endl;
	transform( normal.begin(), normal.end(), normal.begin(), up );
	cout << normal << endl;
	transform( normal.begin(), normal.end(), normal.begin(), down );
	cout << normal << endl;


	// C version
	//setlocale(LC_ALL, "");
	//setlocale(LC_ALL, "pt_BR.UTF-8");
	setlocale(LC_ALL, "en_US.UTF-8");
	cout << endl << "C version: " << endl;
	char buffer[256];
	strcpy( buffer, reference );
	char *buffer_end = buffer + strlen(buffer);
	cout << buffer << endl;
	transform( buffer, buffer_end, buffer, ::toupper );
	cout << buffer << endl;
	transform( buffer, buffer_end, buffer, ::tolower );
	cout << buffer << endl;

   return 0;
   return 0;
}