glib/glib/gwin32.c

/* GLIB - Library of useful routines for C programming
 * Copyright (C) 1995-1998  Peter Mattis, Spencer Kimball and Josh MacDonald
 * Copyright (C) 1998-1999  Tor Lillqvist
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/*
 * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
 * file for a list of people on the GLib Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GLib at ftp://ftp.gtk.org/pub/gtk/. 
 */

/* 
 * MT safe for the unix part, FIXME: make the win32 part MT safe as well.
 */

#include "config.h"

#include "galias.h"
#include "glibconfig.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>

#define STRICT			/* Strict typing, please */
#include <windows.h>
#undef STRICT
#ifndef G_WITH_CYGWIN
#include <direct.h>
#endif
#include <errno.h>
#include <ctype.h>
#ifdef _MSC_VER
#  include <io.h>
#endif /* _MSC_VER */

#include "glib.h"

#ifdef G_WITH_CYGWIN
#include <sys/cygwin.h>
#endif

#ifndef G_WITH_CYGWIN

gint
g_win32_ftruncate (gint  fd,
		   guint size)
{
  return _chsize (fd, size);
}

#endif

/**
 * g_win32_getlocale:
 *
 * The setlocale() function in the Microsoft C library uses locale
 * names of the form "English_United States.1252" etc. We want the
 * UNIXish standard form "en_US", "zh_TW" etc. This function gets the
 * current thread locale from Windows - without any encoding info -
 * and returns it as a string of the above form for use in forming
 * file names etc. The returned string should be deallocated with
 * g_free().
 *
 * Returns: newly-allocated locale name.
 **/

/* Borrowed from GNU gettext 0.13.1: */
/* Mingw headers don't have latest language and sublanguage codes.  */
#ifndef LANG_AFRIKAANS
#define LANG_AFRIKAANS 0x36
#endif
#ifndef LANG_ALBANIAN
#define LANG_ALBANIAN 0x1c
#endif
#ifndef LANG_AMHARIC
#define LANG_AMHARIC 0x5e
#endif
#ifndef LANG_ARABIC
#define LANG_ARABIC 0x01
#endif
#ifndef LANG_ARMENIAN
#define LANG_ARMENIAN 0x2b
#endif
#ifndef LANG_ASSAMESE
#define LANG_ASSAMESE 0x4d
#endif
#ifndef LANG_AZERI
#define LANG_AZERI 0x2c
#endif
#ifndef LANG_BASQUE
#define LANG_BASQUE 0x2d
#endif
#ifndef LANG_BELARUSIAN
#define LANG_BELARUSIAN 0x23
#endif
#ifndef LANG_BENGALI
#define LANG_BENGALI 0x45
#endif
#ifndef LANG_BURMESE
#define LANG_BURMESE 0x55
#endif
#ifndef LANG_CAMBODIAN
#define LANG_CAMBODIAN 0x53
#endif
#ifndef LANG_CATALAN
#define LANG_CATALAN 0x03
#endif
#ifndef LANG_CHEROKEE
#define LANG_CHEROKEE 0x5c
#endif
#ifndef LANG_DIVEHI
#define LANG_DIVEHI 0x65
#endif
#ifndef LANG_EDO
#define LANG_EDO 0x66
#endif
#ifndef LANG_ESTONIAN
#define LANG_ESTONIAN 0x25
#endif
#ifndef LANG_FAEROESE
#define LANG_FAEROESE 0x38
#endif
#ifndef LANG_FARSI
#define LANG_FARSI 0x29
#endif
#ifndef LANG_FRISIAN
#define LANG_FRISIAN 0x62
#endif
#ifndef LANG_FULFULDE
#define LANG_FULFULDE 0x67
#endif
#ifndef LANG_GAELIC
#define LANG_GAELIC 0x3c
#endif
#ifndef LANG_GALICIAN
#define LANG_GALICIAN 0x56
#endif
#ifndef LANG_GEORGIAN
#define LANG_GEORGIAN 0x37
#endif
#ifndef LANG_GUARANI
#define LANG_GUARANI 0x74
#endif
#ifndef LANG_GUJARATI
#define LANG_GUJARATI 0x47
#endif
#ifndef LANG_HAUSA
#define LANG_HAUSA 0x68
#endif
#ifndef LANG_HAWAIIAN
#define LANG_HAWAIIAN 0x75
#endif
#ifndef LANG_HEBREW
#define LANG_HEBREW 0x0d
#endif
#ifndef LANG_HINDI
#define LANG_HINDI 0x39
#endif
#ifndef LANG_IBIBIO
#define LANG_IBIBIO 0x69
#endif
#ifndef LANG_IGBO
#define LANG_IGBO 0x70
#endif
#ifndef LANG_INDONESIAN
#define LANG_INDONESIAN 0x21
#endif
#ifndef LANG_INUKTITUT
#define LANG_INUKTITUT 0x5d
#endif
#ifndef LANG_KANNADA
#define LANG_KANNADA 0x4b
#endif
#ifndef LANG_KANURI
#define LANG_KANURI 0x71
#endif
#ifndef LANG_KASHMIRI
#define LANG_KASHMIRI 0x60
#endif
#ifndef LANG_KAZAK
#define LANG_KAZAK 0x3f
#endif
#ifndef LANG_KONKANI
#define LANG_KONKANI 0x57
#endif
#ifndef LANG_KYRGYZ
#define LANG_KYRGYZ 0x40
#endif
#ifndef LANG_LAO
#define LANG_LAO 0x54
#endif
#ifndef LANG_LATIN
#define LANG_LATIN 0x76
#endif
#ifndef LANG_LATVIAN
#define LANG_LATVIAN 0x26
#endif
#ifndef LANG_LITHUANIAN
#define LANG_LITHUANIAN 0x27
#endif
#ifndef LANG_MACEDONIAN
#define LANG_MACEDONIAN 0x2f
#endif
#ifndef LANG_MALAY
#define LANG_MALAY 0x3e
#endif
#ifndef LANG_MALAYALAM
#define LANG_MALAYALAM 0x4c
#endif
#ifndef LANG_MALTESE
#define LANG_MALTESE 0x3a
#endif
#ifndef LANG_MANIPURI
#define LANG_MANIPURI 0x58
#endif
#ifndef LANG_MARATHI
#define LANG_MARATHI 0x4e
#endif
#ifndef LANG_MONGOLIAN
#define LANG_MONGOLIAN 0x50
#endif
#ifndef LANG_NEPALI
#define LANG_NEPALI 0x61
#endif
#ifndef LANG_ORIYA
#define LANG_ORIYA 0x48
#endif
#ifndef LANG_OROMO
#define LANG_OROMO 0x72
#endif
#ifndef LANG_PAPIAMENTU
#define LANG_PAPIAMENTU 0x79
#endif
#ifndef LANG_PASHTO
#define LANG_PASHTO 0x63
#endif
#ifndef LANG_PUNJABI
#define LANG_PUNJABI 0x46
#endif
#ifndef LANG_RHAETO_ROMANCE
#define LANG_RHAETO_ROMANCE 0x17
#endif
#ifndef LANG_SAAMI
#define LANG_SAAMI 0x3b
#endif
#ifndef LANG_SANSKRIT
#define LANG_SANSKRIT 0x4f
#endif
#ifndef LANG_SERBIAN
#define LANG_SERBIAN 0x1a
#endif
#ifndef LANG_SINDHI
#define LANG_SINDHI 0x59
#endif
#ifndef LANG_SINHALESE
#define LANG_SINHALESE 0x5b
#endif
#ifndef LANG_SLOVAK
#define LANG_SLOVAK 0x1b
#endif
#ifndef LANG_SOMALI
#define LANG_SOMALI 0x77
#endif
#ifndef LANG_SORBIAN
#define LANG_SORBIAN 0x2e
#endif
#ifndef LANG_SUTU
#define LANG_SUTU 0x30
#endif
#ifndef LANG_SWAHILI
#define LANG_SWAHILI 0x41
#endif
#ifndef LANG_SYRIAC
#define LANG_SYRIAC 0x5a
#endif
#ifndef LANG_TAGALOG
#define LANG_TAGALOG 0x64
#endif
#ifndef LANG_TAJIK
#define LANG_TAJIK 0x28
#endif
#ifndef LANG_TAMAZIGHT
#define LANG_TAMAZIGHT 0x5f
#endif
#ifndef LANG_TAMIL
#define LANG_TAMIL 0x49
#endif
#ifndef LANG_TATAR
#define LANG_TATAR 0x44
#endif
#ifndef LANG_TELUGU
#define LANG_TELUGU 0x4a
#endif
#ifndef LANG_THAI
#define LANG_THAI 0x1e
#endif
#ifndef LANG_TIBETAN
#define LANG_TIBETAN 0x51
#endif
#ifndef LANG_TIGRINYA
#define LANG_TIGRINYA 0x73
#endif
#ifndef LANG_TSONGA
#define LANG_TSONGA 0x31
#endif
#ifndef LANG_TSWANA
#define LANG_TSWANA 0x32
#endif
#ifndef LANG_TURKMEN
#define LANG_TURKMEN 0x42
#endif
#ifndef LANG_UKRAINIAN
#define LANG_UKRAINIAN 0x22
#endif
#ifndef LANG_URDU
#define LANG_URDU 0x20
#endif
#ifndef LANG_UZBEK
#define LANG_UZBEK 0x43
#endif
#ifndef LANG_VENDA
#define LANG_VENDA 0x33
#endif
#ifndef LANG_VIETNAMESE
#define LANG_VIETNAMESE 0x2a
#endif
#ifndef LANG_WELSH
#define LANG_WELSH 0x52
#endif
#ifndef LANG_XHOSA
#define LANG_XHOSA 0x34
#endif
#ifndef LANG_YI
#define LANG_YI 0x78
#endif
#ifndef LANG_YIDDISH
#define LANG_YIDDISH 0x3d
#endif
#ifndef LANG_YORUBA
#define LANG_YORUBA 0x6a
#endif
#ifndef LANG_ZULU
#define LANG_ZULU 0x35
#endif
#ifndef SUBLANG_ARABIC_SAUDI_ARABIA
#define SUBLANG_ARABIC_SAUDI_ARABIA 0x01
#endif
#ifndef SUBLANG_ARABIC_IRAQ
#define SUBLANG_ARABIC_IRAQ 0x02
#endif
#ifndef SUBLANG_ARABIC_EGYPT
#define SUBLANG_ARABIC_EGYPT 0x03
#endif
#ifndef SUBLANG_ARABIC_LIBYA
#define SUBLANG_ARABIC_LIBYA 0x04
#endif
#ifndef SUBLANG_ARABIC_ALGERIA
#define SUBLANG_ARABIC_ALGERIA 0x05
#endif
#ifndef SUBLANG_ARABIC_MOROCCO
#define SUBLANG_ARABIC_MOROCCO 0x06
#endif
#ifndef SUBLANG_ARABIC_TUNISIA
#define SUBLANG_ARABIC_TUNISIA 0x07
#endif
#ifndef SUBLANG_ARABIC_OMAN
#define SUBLANG_ARABIC_OMAN 0x08
#endif
#ifndef SUBLANG_ARABIC_YEMEN
#define SUBLANG_ARABIC_YEMEN 0x09
#endif
#ifndef SUBLANG_ARABIC_SYRIA
#define SUBLANG_ARABIC_SYRIA 0x0a
#endif
#ifndef SUBLANG_ARABIC_JORDAN
#define SUBLANG_ARABIC_JORDAN 0x0b
#endif
#ifndef SUBLANG_ARABIC_LEBANON
#define SUBLANG_ARABIC_LEBANON 0x0c
#endif
#ifndef SUBLANG_ARABIC_KUWAIT
#define SUBLANG_ARABIC_KUWAIT 0x0d
#endif
#ifndef SUBLANG_ARABIC_UAE
#define SUBLANG_ARABIC_UAE 0x0e
#endif
#ifndef SUBLANG_ARABIC_BAHRAIN
#define SUBLANG_ARABIC_BAHRAIN 0x0f
#endif
#ifndef SUBLANG_ARABIC_QATAR
#define SUBLANG_ARABIC_QATAR 0x10
#endif
#ifndef SUBLANG_AZERI_LATIN
#define SUBLANG_AZERI_LATIN 0x01
#endif
#ifndef SUBLANG_AZERI_CYRILLIC
#define SUBLANG_AZERI_CYRILLIC 0x02
#endif
#ifndef SUBLANG_BENGALI_INDIA
#define SUBLANG_BENGALI_INDIA 0x00
#endif
#ifndef SUBLANG_BENGALI_BANGLADESH
#define SUBLANG_BENGALI_BANGLADESH 0x01
#endif
#ifndef SUBLANG_CHINESE_MACAU
#define SUBLANG_CHINESE_MACAU 0x05
#endif
#ifndef SUBLANG_ENGLISH_SOUTH_AFRICA
#define SUBLANG_ENGLISH_SOUTH_AFRICA 0x07
#endif
#ifndef SUBLANG_ENGLISH_JAMAICA
#define SUBLANG_ENGLISH_JAMAICA 0x08
#endif
#ifndef SUBLANG_ENGLISH_CARIBBEAN
#define SUBLANG_ENGLISH_CARIBBEAN 0x09
#endif
#ifndef SUBLANG_ENGLISH_BELIZE
#define SUBLANG_ENGLISH_BELIZE 0x0a
#endif
#ifndef SUBLANG_ENGLISH_TRINIDAD
#define SUBLANG_ENGLISH_TRINIDAD 0x0b
#endif
#ifndef SUBLANG_ENGLISH_ZIMBABWE
#define SUBLANG_ENGLISH_ZIMBABWE 0x0c
#endif
#ifndef SUBLANG_ENGLISH_PHILIPPINES
#define SUBLANG_ENGLISH_PHILIPPINES 0x0d
#endif
#ifndef SUBLANG_ENGLISH_INDONESIA
#define SUBLANG_ENGLISH_INDONESIA 0x0e
#endif
#ifndef SUBLANG_ENGLISH_HONGKONG
#define SUBLANG_ENGLISH_HONGKONG 0x0f
#endif
#ifndef SUBLANG_ENGLISH_INDIA
#define SUBLANG_ENGLISH_INDIA 0x10
#endif
#ifndef SUBLANG_ENGLISH_MALAYSIA
#define SUBLANG_ENGLISH_MALAYSIA 0x11
#endif
#ifndef SUBLANG_ENGLISH_SINGAPORE
#define SUBLANG_ENGLISH_SINGAPORE 0x12
#endif
#ifndef SUBLANG_FRENCH_LUXEMBOURG
#define SUBLANG_FRENCH_LUXEMBOURG 0x05
#endif
#ifndef SUBLANG_FRENCH_MONACO
#define SUBLANG_FRENCH_MONACO 0x06
#endif
#ifndef SUBLANG_FRENCH_WESTINDIES
#define SUBLANG_FRENCH_WESTINDIES 0x07
#endif
#ifndef SUBLANG_FRENCH_REUNION
#define SUBLANG_FRENCH_REUNION 0x08
#endif
#ifndef SUBLANG_FRENCH_CONGO
#define SUBLANG_FRENCH_CONGO 0x09
#endif
#ifndef SUBLANG_FRENCH_SENEGAL
#define SUBLANG_FRENCH_SENEGAL 0x0a
#endif
#ifndef SUBLANG_FRENCH_CAMEROON
#define SUBLANG_FRENCH_CAMEROON 0x0b
#endif
#ifndef SUBLANG_FRENCH_COTEDIVOIRE
#define SUBLANG_FRENCH_COTEDIVOIRE 0x0c
#endif
#ifndef SUBLANG_FRENCH_MALI
#define SUBLANG_FRENCH_MALI 0x0d
#endif
#ifndef SUBLANG_FRENCH_MOROCCO
#define SUBLANG_FRENCH_MOROCCO 0x0e
#endif
#ifndef SUBLANG_FRENCH_HAITI
#define SUBLANG_FRENCH_HAITI 0x0f
#endif
#ifndef SUBLANG_GERMAN_LUXEMBOURG
#define SUBLANG_GERMAN_LUXEMBOURG 0x04
#endif
#ifndef SUBLANG_GERMAN_LIECHTENSTEIN
#define SUBLANG_GERMAN_LIECHTENSTEIN 0x05
#endif
#ifndef SUBLANG_KASHMIRI_INDIA
#define SUBLANG_KASHMIRI_INDIA 0x02
#endif
#ifndef SUBLANG_MALAY_MALAYSIA
#define SUBLANG_MALAY_MALAYSIA 0x01
#endif
#ifndef SUBLANG_MALAY_BRUNEI_DARUSSALAM
#define SUBLANG_MALAY_BRUNEI_DARUSSALAM 0x02
#endif
#ifndef SUBLANG_NEPALI_INDIA
#define SUBLANG_NEPALI_INDIA 0x02
#endif
#ifndef SUBLANG_PUNJABI_INDIA
#define SUBLANG_PUNJABI_INDIA 0x00
#endif
#ifndef SUBLANG_PUNJABI_PAKISTAN
#define SUBLANG_PUNJABI_PAKISTAN 0x01
#endif
#ifndef SUBLANG_ROMANIAN_ROMANIA
#define SUBLANG_ROMANIAN_ROMANIA 0x00
#endif
#ifndef SUBLANG_ROMANIAN_MOLDOVA
#define SUBLANG_ROMANIAN_MOLDOVA 0x01
#endif
#ifndef SUBLANG_SERBIAN_LATIN
#define SUBLANG_SERBIAN_LATIN 0x02
#endif
#ifndef SUBLANG_SERBIAN_CYRILLIC
#define SUBLANG_SERBIAN_CYRILLIC 0x03
#endif
#ifndef SUBLANG_SINDHI_INDIA
#define SUBLANG_SINDHI_INDIA 0x00
#endif
#ifndef SUBLANG_SINDHI_PAKISTAN
#define SUBLANG_SINDHI_PAKISTAN 0x01
#endif
#ifndef SUBLANG_SPANISH_GUATEMALA
#define SUBLANG_SPANISH_GUATEMALA 0x04
#endif
#ifndef SUBLANG_SPANISH_COSTA_RICA
#define SUBLANG_SPANISH_COSTA_RICA 0x05
#endif
#ifndef SUBLANG_SPANISH_PANAMA
#define SUBLANG_SPANISH_PANAMA 0x06
#endif
#ifndef SUBLANG_SPANISH_DOMINICAN_REPUBLIC
#define SUBLANG_SPANISH_DOMINICAN_REPUBLIC 0x07
#endif
#ifndef SUBLANG_SPANISH_VENEZUELA
#define SUBLANG_SPANISH_VENEZUELA 0x08
#endif
#ifndef SUBLANG_SPANISH_COLOMBIA
#define SUBLANG_SPANISH_COLOMBIA 0x09
#endif
#ifndef SUBLANG_SPANISH_PERU
#define SUBLANG_SPANISH_PERU 0x0a
#endif
#ifndef SUBLANG_SPANISH_ARGENTINA
#define SUBLANG_SPANISH_ARGENTINA 0x0b
#endif
#ifndef SUBLANG_SPANISH_ECUADOR
#define SUBLANG_SPANISH_ECUADOR 0x0c
#endif
#ifndef SUBLANG_SPANISH_CHILE
#define SUBLANG_SPANISH_CHILE 0x0d
#endif
#ifndef SUBLANG_SPANISH_URUGUAY
#define SUBLANG_SPANISH_URUGUAY 0x0e
#endif
#ifndef SUBLANG_SPANISH_PARAGUAY
#define SUBLANG_SPANISH_PARAGUAY 0x0f
#endif
#ifndef SUBLANG_SPANISH_BOLIVIA
#define SUBLANG_SPANISH_BOLIVIA 0x10
#endif
#ifndef SUBLANG_SPANISH_EL_SALVADOR
#define SUBLANG_SPANISH_EL_SALVADOR 0x11
#endif
#ifndef SUBLANG_SPANISH_HONDURAS
#define SUBLANG_SPANISH_HONDURAS 0x12
#endif
#ifndef SUBLANG_SPANISH_NICARAGUA
#define SUBLANG_SPANISH_NICARAGUA 0x13
#endif
#ifndef SUBLANG_SPANISH_PUERTO_RICO
#define SUBLANG_SPANISH_PUERTO_RICO 0x14
#endif
#ifndef SUBLANG_SWEDISH_FINLAND
#define SUBLANG_SWEDISH_FINLAND 0x02
#endif
#ifndef SUBLANG_TAMAZIGHT_ARABIC
#define SUBLANG_TAMAZIGHT_ARABIC 0x01
#endif
#ifndef SUBLANG_TAMAZIGHT_LATIN
#define SUBLANG_TAMAZIGHT_LATIN 0x02
#endif
#ifndef SUBLANG_TIGRINYA_ETHIOPIA
#define SUBLANG_TIGRINYA_ETHIOPIA 0x00
#endif
#ifndef SUBLANG_TIGRINYA_ERITREA
#define SUBLANG_TIGRINYA_ERITREA 0x01
#endif
#ifndef SUBLANG_URDU_PAKISTAN
#define SUBLANG_URDU_PAKISTAN 0x01
#endif
#ifndef SUBLANG_URDU_INDIA
#define SUBLANG_URDU_INDIA 0x02
#endif
#ifndef SUBLANG_UZBEK_LATIN
#define SUBLANG_UZBEK_LATIN 0x01
#endif
#ifndef SUBLANG_UZBEK_CYRILLIC
#define SUBLANG_UZBEK_CYRILLIC 0x02
#endif

gchar *
g_win32_getlocale (void)
{
  LCID lcid;
  LANGID langid;
  gchar *ev;
  gint primary, sub;
  gchar *l = "C", *sl = NULL;
  gchar bfr[20];

  /* Let the user override the system settings through environment
     variables, as on POSIX systems.  */
  if (((ev = getenv ("LC_ALL")) != NULL && ev[0] != '\0')
      || ((ev = getenv ("LC_MESSAGES")) != NULL && ev[0] != '\0')
      || ((ev = getenv ("LANG")) != NULL && ev[0] != '\0'))
    return g_strdup (ev);

  /* Use native Win32 API locale ID.  */
  lcid = GetThreadLocale ();

  /* Strip off the sorting rules, keep only the language part.  */
  langid = LANGIDFROMLCID (lcid);

  /* Split into language and territory part.  */
  primary = PRIMARYLANGID (langid);
  sub = SUBLANGID (langid);
  switch (primary)
    {
    case LANG_AFRIKAANS: l = "af"; sl = "ZA"; break;
    case LANG_ALBANIAN: l = "sq"; sl = "AL"; break;
    case LANG_ARABIC:
      l = "ar";
      switch (sub)
	{
	case SUBLANG_ARABIC_SAUDI_ARABIA: sl = "SA"; break;
	case SUBLANG_ARABIC_IRAQ: sl = "IQ"; break;
	case SUBLANG_ARABIC_EGYPT: sl = "EG"; break;
	case SUBLANG_ARABIC_LIBYA: sl = "LY"; break;
	case SUBLANG_ARABIC_ALGERIA: sl = "DZ"; break;
	case SUBLANG_ARABIC_MOROCCO: sl = "MA"; break;
	case SUBLANG_ARABIC_TUNISIA: sl = "TN"; break;
	case SUBLANG_ARABIC_OMAN: sl = "OM"; break;
	case SUBLANG_ARABIC_YEMEN: sl = "YE"; break;
	case SUBLANG_ARABIC_SYRIA: sl = "SY"; break;
	case SUBLANG_ARABIC_JORDAN: sl = "JO"; break;
	case SUBLANG_ARABIC_LEBANON: sl = "LB"; break;
	case SUBLANG_ARABIC_KUWAIT: sl = "KW"; break;
	case SUBLANG_ARABIC_UAE: sl = "AE"; break;
	case SUBLANG_ARABIC_BAHRAIN: sl = "BH"; break;
	case SUBLANG_ARABIC_QATAR: sl = "QA"; break;
	}
      break;
    case LANG_ARMENIAN: l = "hy"; sl = "AM"; break;
    case LANG_ASSAMESE: l = "as"; sl = "IN"; break;
    case LANG_AZERI:
      l = "az";
      switch (sub)
	{
	/* FIXME: Adjust this when Azerbaijani locales appear on Unix.  */
	case SUBLANG_AZERI_LATIN: sl = "AZ@latin"; break;
	case SUBLANG_AZERI_CYRILLIC: sl = "AZ@cyrillic"; break;
	}
      break;
    case LANG_BASQUE:
      l = "eu"; /* sl could be "ES" or "FR".  */
      break;
    case LANG_BELARUSIAN: l = "be"; sl = "BY"; break;
    case LANG_BENGALI:
      l = "bn";
      switch (sub)
	{
	case SUBLANG_BENGALI_INDIA: sl = "IN"; break;
	case SUBLANG_BENGALI_BANGLADESH: sl = "BD"; break;
	}
      break;
    case LANG_BULGARIAN: l = "bg"; sl = "BG"; break;
    case LANG_BURMESE: l = "my"; sl = "MM"; break;
    case LANG_CAMBODIAN: l = "km"; sl = "KH"; break;
    case LANG_CATALAN: l = "ca"; sl = "ES"; break;
    case LANG_CHINESE:
      l = "zh";
      switch (sub)
	{
	case SUBLANG_CHINESE_TRADITIONAL: sl = "TW"; break;
	case SUBLANG_CHINESE_SIMPLIFIED: sl = "CN"; break;
	case SUBLANG_CHINESE_HONGKONG: sl = "HK"; break;
	case SUBLANG_CHINESE_SINGAPORE: sl = "SG"; break;
	case SUBLANG_CHINESE_MACAU: sl = "MO"; break;
	}
      break;
    case LANG_CROATIAN:		/* LANG_CROATIAN == LANG_SERBIAN */
      switch (sub)
	{
	/* FIXME: How to distinguish Croatian and Latin Serbian locales?  */
	case SUBLANG_SERBIAN_LATIN: l = "sr"; sl = "@Latn"; break;
	case SUBLANG_SERBIAN_CYRILLIC: l = "sr"; break;
	default: l = "hr"; sl = "HR";
	}
      break;
    case LANG_CZECH: l = "cs"; sl = "CZ"; break;
    case LANG_DANISH: l = "da"; sl = "DK"; break;
    case LANG_DIVEHI: l = "div"; sl = "MV"; break;
    case LANG_DUTCH:
      l = "nl";
      switch (sub)
	{
	case SUBLANG_DUTCH: sl = "NL"; break;
	case SUBLANG_DUTCH_BELGIAN: sl = "BE"; break;
	}
      break;
    case LANG_ENGLISH:
      l = "en";
      switch (sub)
	{
	case SUBLANG_ENGLISH_US: sl = "US"; break;
	case SUBLANG_ENGLISH_UK: sl = "GB"; break;
	case SUBLANG_ENGLISH_AUS: sl = "AU"; break;
	case SUBLANG_ENGLISH_CAN: sl = "CA"; break;
	case SUBLANG_ENGLISH_NZ: sl = "NZ"; break;
	case SUBLANG_ENGLISH_EIRE: sl = "IE"; break;
	case SUBLANG_ENGLISH_SOUTH_AFRICA: sl = "ZA"; break;
	case SUBLANG_ENGLISH_JAMAICA: sl = "JM"; break;
	case SUBLANG_ENGLISH_CARIBBEAN: sl = "GD"; break; /* Grenada? */
	case SUBLANG_ENGLISH_BELIZE: sl = "BZ"; break;
	case SUBLANG_ENGLISH_TRINIDAD: sl = "TT"; break;
	case SUBLANG_ENGLISH_ZIMBABWE: sl = "ZW"; break;
	case SUBLANG_ENGLISH_PHILIPPINES: sl = "PH"; break;
	case SUBLANG_ENGLISH_INDONESIA: sl = "ID"; break;
	case SUBLANG_ENGLISH_HONGKONG: sl = "HK"; break;
	case SUBLANG_ENGLISH_INDIA: sl = "IN"; break;
	case SUBLANG_ENGLISH_MALAYSIA: sl = "MY"; break;
	case SUBLANG_ENGLISH_SINGAPORE: sl = "SG"; break;
	}
      break;
    case LANG_ESTONIAN: l = "et"; sl = "EE"; break;
    case LANG_FAEROESE: l = "fo"; sl = "FO"; break;
    case LANG_FARSI: l = "fa"; sl = "IR"; break;
    case LANG_FINNISH: l = "fi"; sl = "FI"; break;
    case LANG_FRENCH:
      l = "fr";
      switch (sub)
	{
	case SUBLANG_FRENCH: sl = "FR"; break;
	case SUBLANG_FRENCH_BELGIAN: sl = "BE"; break;
	case SUBLANG_FRENCH_CANADIAN: sl = "CA"; break;
	case SUBLANG_FRENCH_SWISS: sl = "CH"; break;
	case SUBLANG_FRENCH_LUXEMBOURG: sl = "LU"; break;
	case SUBLANG_FRENCH_MONACO: sl = "MC"; break;
	case SUBLANG_FRENCH_WESTINDIES: break;
	case SUBLANG_FRENCH_REUNION: sl = "RE"; break;
	case SUBLANG_FRENCH_CONGO: sl = "CG"; break;
	case SUBLANG_FRENCH_SENEGAL: sl = "SN"; break;
	case SUBLANG_FRENCH_CAMEROON: sl = "CM"; break;
	case SUBLANG_FRENCH_COTEDIVOIRE: sl = "CI"; break;
	case SUBLANG_FRENCH_MALI: sl = "ML"; break;
	case SUBLANG_FRENCH_MOROCCO: sl = "MA"; break;
	case SUBLANG_FRENCH_HAITI: sl = "HT"; break;
	}
      break;
    case LANG_FRISIAN: l = "fy"; sl ="NL"; break;
    case LANG_FULFULDE: l = "ful"; sl = "NG"; break;
    case LANG_GAELIC:
      switch (sub)
	{
	case 0x01: /* SCOTTISH */ l = "gd"; sl = "GB"; break;
	case 0x02: /* IRISH */ l = "ga"; sl = "IE"; break;
	}
      break;
    case LANG_GALICIAN: l = "gl"; sl = "ES"; break;
    case LANG_GEORGIAN: l = "ka"; sl = "GE"; break;
    case LANG_GERMAN:
      l = "de";
      switch (sub)
	{
	case SUBLANG_GERMAN: sl = "DE"; break;
	case SUBLANG_GERMAN_SWISS: sl = "CH"; break;
	case SUBLANG_GERMAN_AUSTRIAN: sl = "AT"; break;
	case SUBLANG_GERMAN_LUXEMBOURG: sl = "LU"; break;
	case SUBLANG_GERMAN_LIECHTENSTEIN: sl = "LI"; break;
	}
      break;
    case LANG_GREEK: l = "el"; sl = "GR"; break;
    case LANG_GUARANI: l = "gn"; sl = "PY"; break;
    case LANG_GUJARATI: l = "gu"; sl = "IN"; break;
    case LANG_HAUSA: l = "ha"; sl = "NG"; break;
    case LANG_HAWAIIAN:
      /* FIXME: Do they mean Hawaiian ("haw_US", 1000 speakers)
       * or Hawaii Creole English ("cpe_US", 600000 speakers)?
       */
      l = "cpe";
      sl = "US";
      break;
    case LANG_HEBREW: l = "he"; sl = "IL"; break;
    case LANG_HINDI: l = "hi"; sl = "IN"; break;
    case LANG_HUNGARIAN: l = "hu"; sl = "HU"; break;
    case LANG_IBIBIO: l = "nic"; sl = "NG"; break;
    case LANG_ICELANDIC: l = "is"; sl = "IS"; break;
    case LANG_IGBO: l = "ibo"; sl = "NG"; break;
    case LANG_INDONESIAN: l = "id"; sl = "ID"; break;
    case LANG_INUKTITUT: l = "iu"; sl = "CA"; break;
    case LANG_ITALIAN:
      l = "it";
      switch (sub)
	{
	case SUBLANG_ITALIAN: sl = "IT"; break;
	case SUBLANG_ITALIAN_SWISS: sl = "CH"; break;
	}
      break;
    case LANG_JAPANESE: l = "ja"; sl = "JP"; break;
    case LANG_KANNADA: l = "kn"; sl = "IN"; break;
    case LANG_KANURI: l = "kau"; sl = "NG"; break;
    case LANG_KASHMIRI:
      l = "ks";
      switch (sub)
	{
	case SUBLANG_DEFAULT: sl = "PK"; break;
	case SUBLANG_KASHMIRI_INDIA: sl = "IN"; break;
	}
      break;
    case LANG_KAZAK: l = "kk"; sl = "KZ"; break;
    case LANG_KONKANI:
      /* FIXME: Adjust this when such locales appear on Unix.  */
      l = "kok";
      sl = "IN";
      break;
    case LANG_KOREAN: l = "ko"; sl = "KR"; break;
    case LANG_KYRGYZ: l = "ky"; sl = "KG"; break; 
    case LANG_LAO: l = "lo"; sl = "LA"; break;
    case LANG_LATIN: l = "la"; sl = "VA"; break;
    case LANG_LATVIAN: l = "lv"; sl = "LV"; break;
    case LANG_LITHUANIAN: l = "lt"; sl = "LT"; break;
    case LANG_MACEDONIAN: l = "mk"; sl = "MK"; break;
    case LANG_MALAY:
      l = "ms";
      switch (sub)
	{
	case SUBLANG_MALAY_MALAYSIA: sl = "MY"; break;
	case SUBLANG_MALAY_BRUNEI_DARUSSALAM: sl = "BN"; break;
	}
      break;
    case LANG_MALAYALAM: l = "ml"; sl = "IN"; break;
    case LANG_MANIPURI:
      /* FIXME: Adjust this when such locales appear on Unix.  */
      l = "mni";
      sl = "IN";
      break;
    case LANG_MARATHI: l = "mr"; sl = "IN"; break;
    case LANG_MONGOLIAN:
      /* Ambiguous: could be "mn_CN" or "mn_MN".  */
      l = "mn";
      break;
    case LANG_NEPALI:
      l = "ne";
      switch (sub)
	{
	case SUBLANG_DEFAULT: sl = "NP"; break;
	case SUBLANG_NEPALI_INDIA: sl = "IN"; break;
	}
      break;
    case LANG_NORWEGIAN:
      l = "no";
      switch (sub)
	{
	case SUBLANG_NORWEGIAN_BOKMAL: sl = "NO"; break;
	case SUBLANG_NORWEGIAN_NYNORSK: l = "nn"; sl = "NO"; break;
	}
      break;
    case LANG_ORIYA: l = "or"; sl = "IN"; break;
    case LANG_OROMO: l = "om"; sl = "ET"; break;
    case LANG_PAPIAMENTU: l = "pap"; sl = "AN"; break;
    case LANG_PASHTO:
      /* Ambiguous: could be "ps_PK" or "ps_AF".  */
      l = "ps";
      break;
    case LANG_POLISH: l = "pl"; sl = "PL"; break;
    case LANG_PORTUGUESE:
      l = "pt";
      switch (sub)
	{
	case SUBLANG_PORTUGUESE: sl = "PT"; break;
	case SUBLANG_PORTUGUESE_BRAZILIAN: sl = "BR"; break;
	}
      break;
    case LANG_PUNJABI:
      l = "pa";
      switch (sub)
	{
	case SUBLANG_PUNJABI_INDIA: sl = "IN"; break; /* Gurmukhi script */
	case SUBLANG_PUNJABI_PAKISTAN: sl = "PK"; break; /* Arabic script */
	}
      break;
    case LANG_RHAETO_ROMANCE: l = "rm"; sl = "CH"; break;
    case LANG_ROMANIAN:
      l = "ro";
      switch (sub)
	{
	case SUBLANG_ROMANIAN_ROMANIA: sl = "RO"; break;
	case SUBLANG_ROMANIAN_MOLDOVA: sl = "MD"; break;
	}
      break;
    case LANG_RUSSIAN:
      l = "ru";/* Ambiguous: could be "ru_RU" or "ru_UA" or "ru_MD". */
      break;
    case LANG_SAAMI: /* actually Northern Sami */ l = "se"; sl = "NO"; break;
    case LANG_SANSKRIT: l = "sa"; sl = "IN"; break;
    case LANG_SINDHI: l = "sd";
      switch (sub)
	{
	case SUBLANG_SINDHI_INDIA: sl = "IN"; break;
	case SUBLANG_SINDHI_PAKISTAN: sl = "PK"; break;
	}
      break;
    case LANG_SINHALESE: l = "si"; sl = "LK"; break;
    case LANG_SLOVAK: l = "sk"; sl = "SK"; break;
    case LANG_SLOVENIAN: l = "sl"; sl = "SI"; break;
    case LANG_SOMALI: l = "so"; sl = "SO"; break;
    case LANG_SORBIAN:
      /* FIXME: Adjust this when such locales appear on Unix.  */
      l = "wen";
      sl = "DE";
      break;
    case LANG_SPANISH:
      l = "es";
      switch (sub)
	{
	case SUBLANG_SPANISH: sl = "ES"; break;
	case SUBLANG_SPANISH_MEXICAN: sl = "MX"; break;
	case SUBLANG_SPANISH_MODERN:
	  sl = "ES@modern"; break;	/* not seen on Unix */
	case SUBLANG_SPANISH_GUATEMALA: sl = "GT"; break;
	case SUBLANG_SPANISH_COSTA_RICA: sl = "CR"; break;
	case SUBLANG_SPANISH_PANAMA: sl = "PA"; break;
	case SUBLANG_SPANISH_DOMINICAN_REPUBLIC: sl = "DO"; break;
	case SUBLANG_SPANISH_VENEZUELA: sl = "VE"; break;
	case SUBLANG_SPANISH_COLOMBIA: sl = "CO"; break;
	case SUBLANG_SPANISH_PERU: sl = "PE"; break;
	case SUBLANG_SPANISH_ARGENTINA: sl = "AR"; break;
	case SUBLANG_SPANISH_ECUADOR: sl = "EC"; break;
	case SUBLANG_SPANISH_CHILE: sl = "CL"; break;
	case SUBLANG_SPANISH_URUGUAY: sl = "UY"; break;
	case SUBLANG_SPANISH_PARAGUAY: sl = "PY"; break;
	case SUBLANG_SPANISH_BOLIVIA: sl = "BO"; break;
	case SUBLANG_SPANISH_EL_SALVADOR: sl = "SV"; break;
	case SUBLANG_SPANISH_HONDURAS: sl = "HN"; break;
	case SUBLANG_SPANISH_NICARAGUA: sl = "NI"; break;
	case SUBLANG_SPANISH_PUERTO_RICO: sl = "PR"; break;
	}
      break;
    case LANG_SUTU: l = "bnt"; sl = "TZ"; break; /* or "st_LS" or "nso_ZA"? */ 
    case LANG_SWAHILI: l = "sw"; sl = "KE"; break;
    case LANG_SWEDISH:
      l = "sv";
      switch (sub)
	{
	case SUBLANG_DEFAULT: sl = "SE"; break;
	case SUBLANG_SWEDISH_FINLAND: sl = "FI"; break;
	}
      break;
    case LANG_SYRIAC: l = "syr"; sl = "TR"; break; /* An extinct language. */
    case LANG_TAGALOG: l = "tl"; sl = "PH"; break;
    case LANG_TAJIK: l = "tg"; sl = "TJ"; break;
    case LANG_TAMIL:
      l = "ta"; /* Ambiguous: could be "ta_IN" or "ta_LK" or "ta_SG". */
      break;
    case LANG_TATAR: l = "tt"; sl = "RU"; break;
    case LANG_TELUGU: l = "te"; sl = "IN"; break;
    case LANG_THAI: l = "th"; sl = "TH"; break;
    case LANG_TIBETAN: l = "bo"; sl = "CN"; break;
    case LANG_TIGRINYA:
      l = "ti";
      switch (sub)
	{
	case SUBLANG_TIGRINYA_ETHIOPIA: sl = "ET"; break;
	case SUBLANG_TIGRINYA_ERITREA: sl = "ER"; break;
	}
      break;
    case LANG_TSONGA: l = "ts"; sl = "ZA"; break;
    case LANG_TSWANA: l = "tn"; sl = "BW"; break;
    case LANG_TURKISH: l = "tr"; sl = "TR"; break;
    case LANG_TURKMEN: l = "tk"; sl = "TM"; break;
    case LANG_UKRAINIAN: l = "uk"; sl = "UA"; break;
    case LANG_URDU:
      l = "ur";
      switch (sub)
	{
	case SUBLANG_URDU_PAKISTAN: sl = "PK"; break;
	case SUBLANG_URDU_INDIA: sl = "IN"; break;
	}
      break;
    case LANG_UZBEK:
      l = "uz";
      switch (sub)
	{
	case SUBLANG_UZBEK_LATIN: sl = "UZ"; break;
	case SUBLANG_UZBEK_CYRILLIC: sl = "UZ@cyrillic"; break;
	}
      break;
    case LANG_VENDA:
      /* FIXME: It's not clear whether Venda has the ISO 639-2 two-letter code
	 "ve" or not.
	 http://www.loc.gov/standards/iso639-2/englangn.html has it, but
	 http://lcweb.loc.gov/standards/iso639-2/codechanges.html doesn't,  */
      l = "ven"; /* or "ve"? */
      sl = "ZA";
      break;
    case LANG_VIETNAMESE: l = "vi"; sl = "VN"; break;
    case LANG_WELSH: l = "cy"; sl = "GB"; break;
    case LANG_XHOSA: l = "xh"; sl = "ZA"; break;
    case LANG_YI: l = "sit"; sl = "CN"; break;
    case LANG_YIDDISH: l = "yi"; sl = "IL"; break;
    case LANG_YORUBA: l = "yo"; sl = "NG"; break;
    case LANG_ZULU: l = "zu"; sl = "ZA"; break;
    }
  strcpy (bfr, l);
  if (sl != NULL)
    {
      if (sl[0] != '@')
	strcat (bfr, "_");
      strcat (bfr, sl);
    }

  return g_strdup (bfr);
}

/**
 * g_win32_error_message:
 * @error: error code.
 *
 * Translate a Win32 error code (as returned by GetLastError()) into
 * the corresponding message. The message is either language neutral,
 * or in the thread's language, or the user's language, the system's
 * language, or US English (see docs for FormatMessage()). The
 * returned string is in UTF-8. It should be deallocated with
 * g_free().
 *
 * Returns: newly-allocated error message
 **/
gchar *
g_win32_error_message (gint error)
{
  gchar *retval;

  if (G_WIN32_HAVE_WIDECHAR_API ())
    {
      wchar_t *msg = NULL;
      int nchars;

      FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER
		      |FORMAT_MESSAGE_IGNORE_INSERTS
		      |FORMAT_MESSAGE_FROM_SYSTEM,
		      NULL, error, 0,
		      (LPTSTR) &msg, 0, NULL);
      if (msg != NULL)
	{
	  nchars = wcslen (msg);

	  if (nchars > 2 && msg[nchars-1] == '\n' && msg[nchars-2] == '\r')
	    msg[nchars-2] = '\0';
	  
	  retval = g_utf16_to_utf8 (msg, -1, NULL, NULL, NULL);
	  
	  LocalFree (msg);
	}
      else
	retval = g_strdup ("");
    }
  else
    {
      gchar *msg = NULL;
      int nbytes;

      FormatMessageA (FORMAT_MESSAGE_ALLOCATE_BUFFER
		      |FORMAT_MESSAGE_IGNORE_INSERTS
		      |FORMAT_MESSAGE_FROM_SYSTEM,
		      NULL, error, 0,
		      (LPTSTR) &msg, 0, NULL);
      if (msg != NULL)
	{
	  nbytes = strlen (msg);

	  if (nbytes > 2 && msg[nbytes-1] == '\n' && msg[nbytes-2] == '\r')
	    msg[nbytes-2] = '\0';
	  
	  retval = g_locale_to_utf8 (msg, -1, NULL, NULL, NULL);
	  
	  LocalFree (msg);
	}
      else
	retval = g_strdup ("");
    }

  return retval;
}

static gchar *
get_package_directory_from_module (gchar *module_name)
{
  static GHashTable *module_dirs = NULL;
  G_LOCK_DEFINE_STATIC (module_dirs);
  HMODULE hmodule = NULL;
  gchar *fn;
  gchar *p;
  gchar *result;

  G_LOCK (module_dirs);

  if (module_dirs == NULL)
    module_dirs = g_hash_table_new (g_str_hash, g_str_equal);
  
  result = g_hash_table_lookup (module_dirs, module_name ? module_name : "");
      
  if (result)
    {
      G_UNLOCK (module_dirs);
      return g_strdup (result);
    }

  if (module_name)
    {
      if (G_WIN32_HAVE_WIDECHAR_API ())
	{
	  wchar_t *wc_module_name = g_utf8_to_utf16 (module_name, -1, NULL, NULL, NULL);
	  hmodule = GetModuleHandleW (wc_module_name);
	  g_free (wc_module_name);
	}
      else
	{
	  char *cp_module_name = g_locale_from_utf8 (module_name, -1, NULL, NULL, NULL);
	  hmodule = GetModuleHandleA (cp_module_name);
	  g_free (cp_module_name);
	}
      if (!hmodule)
	return NULL;
    }

  if (G_WIN32_HAVE_WIDECHAR_API ())
    {
      wchar_t wc_fn[MAX_PATH];
      if (!GetModuleFileNameW (hmodule, wc_fn, MAX_PATH))
	{
	  G_UNLOCK (module_dirs);
	  return NULL;
	}
      fn = g_utf16_to_utf8 (wc_fn, -1, NULL, NULL, NULL);
    }
  else
    {
      gchar cp_fn[MAX_PATH];
      if (!GetModuleFileNameA (hmodule, cp_fn, MAX_PATH))
	{
	  G_UNLOCK (module_dirs);
	  return NULL;
	}
      fn = g_locale_to_utf8 (cp_fn, -1, NULL, NULL, NULL);
    }

  if ((p = strrchr (fn, G_DIR_SEPARATOR)) != NULL)
    *p = '\0';

  p = strrchr (fn, G_DIR_SEPARATOR);
  if (p && (g_ascii_strcasecmp (p + 1, "bin") == 0 ||
	    g_ascii_strcasecmp (p + 1, "lib") == 0))
    *p = '\0';

#ifdef G_WITH_CYGWIN
  /* In Cygwin we need to have POSIX paths */
  {
    gchar tmp[MAX_PATH];

    cygwin_conv_to_posix_path(fn, tmp);
    g_free(fn);
    fn = g_strdup(tmp);
  }
#endif

  g_hash_table_insert (module_dirs, module_name ? module_name : "", fn);

  G_UNLOCK (module_dirs);

  return g_strdup (fn);
}

/**
 * g_win32_get_package_installation_directory:
 * @package: An identifier for a software package, or %NULL, in UTF-8
 * @dll_name: The name of a DLL that a package provides, or %NULL, in the GLib file name encoding, which is UTF-8 on Windows.
 *
 * Try to determine the installation directory for a software package.
 * Typically used by GNU software packages.
 *
 * @package should be a short identifier for the package. Typically it
 * is the same identifier as used for
 * <literal>GETTEXT_PACKAGE</literal> in software configured according
 * to GNU standards. The function first looks in the Windows Registry
 * for the value <literal>&num;InstallationDirectory</literal> in the key
 * <literal>&num;HKLM\Software\@package</literal>, and if that value
 * exists and is a string, returns that.
 *
 * If @package is %NULL, or the above value isn't found in the
 * Registry, but @dll_name is non-%NULL, it should name a DLL loaded
 * into the current process. Typically that would be the name of the
 * DLL calling this function, looking for its installation
 * directory. The function then asks Windows what directory that DLL
 * was loaded from. If that directory's last component is "bin" or
 * "lib", the parent directory is returned, otherwise the directory
 * itself. If that DLL isn't loaded, the function proceeds as if
 * @dll_name was %NULL.
 *
 * If both @package and @dll_name are %NULL, the directory from where
 * the main executable of the process was loaded is uses instead in
 * the same way as above.
 *
 * Returns: a string containing the installation directory for
 * @package. The string is in the GLib file name encoding, i.e. UTF-8
 * on Windows. The return value should be freed with g_free() when not
 * needed any longer.
 **/

gchar *
g_win32_get_package_installation_directory (gchar *package,
					    gchar *dll_name)
{
  static GHashTable *package_dirs = NULL;
  G_LOCK_DEFINE_STATIC (package_dirs);
  gchar *result = NULL;
  gchar *key;
  HKEY reg_key = NULL;
  DWORD type;
  DWORD nbytes;

  if (package != NULL)
    {
      G_LOCK (package_dirs);
      
      if (package_dirs == NULL)
	package_dirs = g_hash_table_new (g_str_hash, g_str_equal);
      
      result = g_hash_table_lookup (package_dirs, package);
      
      if (result && result[0])
	{
	  G_UNLOCK (package_dirs);
	  return g_strdup (result);
	}
      
      key = g_strconcat ("Software\\", package, NULL);
      
      nbytes = 0;
      if (G_WIN32_HAVE_WIDECHAR_API ())
	{
	  wchar_t *wc_key = g_utf8_to_utf16 (key, -1, NULL, NULL, NULL);
	  if (((RegOpenKeyExW (HKEY_CURRENT_USER, wc_key, 0,
			       KEY_QUERY_VALUE, &reg_key) == ERROR_SUCCESS
		&& RegQueryValueExW (reg_key, L"InstallationDirectory", 0,
				     &type, NULL, &nbytes) == ERROR_SUCCESS)
	       ||
	       (RegOpenKeyExW (HKEY_LOCAL_MACHINE, wc_key, 0,
			       KEY_QUERY_VALUE, &reg_key) == ERROR_SUCCESS
		&& RegQueryValueExW (reg_key, L"InstallationDirectory", 0,
				     &type, NULL, &nbytes) == ERROR_SUCCESS))
	      && type == REG_SZ)
	    {
	      wchar_t *wc_temp = g_new (wchar_t, (nbytes+1)/2 + 1);
	      RegQueryValueExW (reg_key, L"InstallationDirectory", 0,
				&type, (LPBYTE) wc_temp, &nbytes);
	      wc_temp[nbytes/2] = '\0';
	      result = g_utf16_to_utf8 (wc_temp, -1, NULL, NULL, NULL);
	      g_free (wc_temp);
	    }
	  g_free (wc_key);
	}
      else
	{
	  char *cp_key = g_locale_from_utf8 (key, -1, NULL, NULL, NULL);
	  if (((RegOpenKeyExA (HKEY_CURRENT_USER, cp_key, 0,
			       KEY_QUERY_VALUE, &reg_key) == ERROR_SUCCESS
		&& RegQueryValueExA (reg_key, "InstallationDirectory", 0,
				     &type, NULL, &nbytes) == ERROR_SUCCESS)
	       ||
	       (RegOpenKeyExA (HKEY_LOCAL_MACHINE, cp_key, 0,
			       KEY_QUERY_VALUE, &reg_key) == ERROR_SUCCESS
		&& RegQueryValueExA (reg_key, "InstallationDirectory", 0,
				     &type, NULL, &nbytes) == ERROR_SUCCESS))
	      && type == REG_SZ)
	    {
	      char *cp_temp = g_malloc (nbytes + 1);
	      RegQueryValueExA (reg_key, "InstallationDirectory", 0,
				&type, cp_temp, &nbytes);
	      cp_temp[nbytes] = '\0';
	      result = g_locale_to_utf8 (cp_temp, -1, NULL, NULL, NULL);
	      g_free (cp_temp);
	    }
	  g_free (cp_key);
	}

      if (reg_key != NULL)
	RegCloseKey (reg_key);
      
      g_free (key);

      if (result)
	{
	  g_hash_table_insert (package_dirs, package, result);
	  G_UNLOCK (package_dirs);
	  return result;
	}
      G_UNLOCK (package_dirs);
    }

  if (dll_name != NULL)
    result = get_package_directory_from_module (dll_name);

  if (result == NULL)
    result = get_package_directory_from_module (NULL);

  return result;
}

/**
 * g_win32_get_package_installation_subdirectory:
 * @package: An identifier for a software package, or %NULL.
 * @dll_name: The name of a DLL that a package provides, or %NULL.
 * @subdir: A subdirectory of the package installation directory.
 *
 * Returns a newly-allocated string containing the path of the
 * subdirectory @subdir in the return value from calling
 * g_win32_get_package_installation_directory() with the @package and
 * @dll_name parameters. 
 *
 * Returns: a string containing the complete path to @subdir inside
 * the installation directory of @package. The string is in the GLib
 * file name encoding, i.e. UTF-8 on Windows. The return value should
 * be freed with g_free() when no longer needed.
 **/

gchar *
g_win32_get_package_installation_subdirectory (gchar *package,
					       gchar *dll_name,
					       gchar *subdir)
{
  gchar *prefix;
  gchar *dirname;

  prefix = g_win32_get_package_installation_directory (package, dll_name);

  dirname = g_build_filename (prefix, subdir, NULL);
  g_free (prefix);

  return dirname;
}

static guint windows_version;

static void 
g_win32_windows_version_init (void)
{
  static gboolean beenhere = FALSE;

  if (!beenhere)
    {
      beenhere = TRUE;
      if (getenv ("G_WIN32_PRETEND_WIN9X"))
	windows_version = 0x80000004;
      else
	windows_version = GetVersion ();
    }
}

void 
_g_win32_thread_init (void)
{
  g_win32_windows_version_init ();
}

/**
 * g_win32_get_windows_version:
 *
 * Returns version information for the Windows operating system the
 * code is running on. See MSDN documentation for the GetVersion()
 * function. To summarize, the most significant bit is one on Win9x,
 * and zero on NT-based systems. The least significant byte is 4 on
 * Windows NT 4, 5 on Windows XP. Software that needs really detailled
 * version and feature information should use Win32 API like
 * GetVersionEx() and VerifyVersionInfo().
 *
 * If there is an environment variable <envar>G_WIN32_PRETEND_WIN9X</envar> 
 * defined (with any value), this function always returns a version 
 * code for Windows 9x. This is mainly an internal debugging aid for 
 * GTK+ and GLib developers, to be able to check the code paths for 
 * Windows 9x.
 *
 * Returns: The version information.
 * 
 * Since: 2.6
 **/
guint
g_win32_get_windows_version (void)
{
  g_win32_windows_version_init ();
  
  return windows_version;
}