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@gecko0307 gecko0307/i18n.d
Created Jan 14, 2014

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Internationalization module for D programs.
module i18n;
import std.stdio;
import std.conv;
import std.format;
import std.array;
import std.process;
import std.path;
import std.file;
import std.string;
version(Windows)
{
extern(Windows) int GetLocaleInfoW(
in uint Locale,
in uint LCType,
wchar* lpLCData,
in int cchData
);
extern(Windows) int GetLocaleInfoA(
in uint Locale,
in uint LCType,
char* lpLCData,
in int cchData
);
enum uint LOCALE_USER_DEFAULT = 0x0400;
enum uint LOCALE_SISO639LANGNAME = 0x59;
enum uint LOCALE_SISO3166CTRYNAME = 0x5a;
}
string formatString(A...)(string f, A args)
{
auto writer = appender!string();
formattedWrite(writer, f, args);
return writer.data;
}
private string syslocale;
static this()
{
version(Windows)
{
string getLanguage()
{
char[16] str;
GetLocaleInfoA(LOCALE_USER_DEFAULT, LOCALE_SISO639LANGNAME, str.ptr, str.length);
return str.ptr.to!string;
}
string getCountry()
{
char[16] str;
GetLocaleInfoA(LOCALE_USER_DEFAULT, LOCALE_SISO3166CTRYNAME, str.ptr, str.length);
return str.ptr.to!string;
}
string lang = getLanguage();
string country = getCountry();
syslocale = formatString("%s_%s", lang, country);
}
else version(Posix)
{
string lang = environment.get("LANG", "en_US.utf8");
string locale, encoding;
formattedRead(lang, "%s.%s", &locale, &encoding);
syslocale = locale;
}
else
{
static assert(0, "This OS is unsupported by i18n.d");
}
}
string systemLocale()
{
return syslocale;
}
class Locale
{
static string[string] translation;
static void readLang(string dir, string ext = ".lang")
{
if (exists(dir) && isDir(dir))
{
string loc = buildNormalizedPath(dir, syslocale ~ ext);
if (exists(loc))
readLangFile(loc);
}
}
static void readLangFile(string filename)
{
foreach(line; filename.readText.splitLines)
if (line)
{
string key, value;
try
formattedRead(line, "\"%s\" = \"%s\" ", &key, &value);
catch(Exception) {}
finally
translation[key] = value;
}
}
}
string _(string s)
{
if (s in Locale.translation)
return Locale.translation[s];
else
return s;
}
/*
// Usage:
import std.stdio;
import i18n;
void main()
{
Locale.readLang("locale", ".lang");
writeln("Hello, world!"._);
}
// locale/ru_RU.lang:
"Hello, world!" = "Привет, мир!"
*/
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