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Simple C++ gettext-like toolkit
By admin | December 20, 2009
Here is a small gettext-compatible interface for reading simple translation catalogs (not to be confused with gettext’s *.mo style catalogs, which are binary) in form of “original/english string<tab>translated string”. It is not fool-proof, but you can play around with it and it works.
/*
* gettextpd.h
* Main file for GettextPD
*
* © Copyright 2009 Compdigitec. All rights reserved.
*
* Copying and distribution of this file, with or without modification,
* are permitted in any medium without royalty provided the copyright
* notice and this notice are preserved. This file is offered as-is,
* without any warranty.
*/
#ifndef __GETTEXTPD__
#define __GETTEXTPD__
#include <stdlib.h>
#include <cstring>
#include <string>
#include <iostream>
#include <fstream>
// gettext functions
char* gettext (char *msgid);
std::string gettext (std::string msgid);
char* textdomain (const char *domain_name);
char* bindtextdomain (const char *domain_name, const char *dir_name);
char* setlocale (int category, const char* locale);
// macros
#define _(str) gettext(str)
// globals
std::string gtpd_locale = "";
std::string gtpd_domain = "";
std::string gtpd_location = "";
// function bodies
char* gettext(char* msgid)
{
std::string x(msgid);
std::string result;
result = gettext(x);
char* nb = (char*)malloc(sizeof(char)*result.length());
strcpy(nb,result.c_str());
return nb;
}
std::string gettext(std::string msgid)
{
std::string path = gtpd_location + "/" + gtpd_locale + "/LC_MESSAGES/" + gtpd_domain + ".mo";
std::ifstream stream;
stream.open(path.c_str());
std::string resultline;
while(!stream.eof()) {
getline(stream,resultline);
if(strstr(resultline.c_str(),msgid.c_str()) != NULL) {
break;
}
resultline = "";
}
if(resultline == "") {
// not found
return msgid;
}
int splitloc = resultline.find("\t");
return resultline.substr(splitloc+1);
}
char* textdomain(const char *domain_name)
{
gtpd_domain = domain_name;
char* res = (char*)malloc(sizeof(char)*100);
strcpy(res,domain_name);
return res;
}
char* bindtextdomain (const char *domain_name, const char *dir_name)
{
gtpd_location = dir_name;
textdomain(domain_name);
char* res = (char*)malloc(sizeof(char)*100);
strcpy(res,dir_name);
return res;
}
char* setlocale (int category, const char* locale)
{
gtpd_locale = locale;
char* res = (char*)malloc(sizeof(char)*100);
strcpy(res,locale);
return res;
}
#endif
Example usage:
// test.cpp
#include "gettextpd.h"
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
setlocale( LC_ALL, "fr_FR" );
bindtextdomain( "hello", "." );
textdomain( "hello" );
std::cout << gettext("Hello, world!") << "\n";
std::cout << _("THis is A TeST StriNg") << "\n";
exit(0);
}
folder/fr_FR/LC_MESSAGES/hello.mo
Hello, world! Zu bu zu translated str THis is A TeST StriNg test string translated this is#2
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