Explicitly bind gettext to the correct encoding on Windows.

Original patch from Hiroshi Inoue.

src/backend/utils/mb/mbutils.c

@@ -4,7 +4,7 @@
  * (currently mule internal code (mic) is used)
  * Tatsuo Ishii
  *
- * $PostgreSQL: pgsql/src/backend/utils/mb/mbutils.c,v 1.77 2009/01/19 15:34:23 mha Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/mb/mbutils.c,v 1.78 2009/01/22 10:09:48 mha Exp $
  */
 #include "postgres.h"
 
@@ -849,6 +849,46 @@ cliplen(const char *str, int len, int limit)
 	return l;
 }
 
+#if defined(ENABLE_NLS) && defined(WIN32)
+static const struct codeset_map {
+	int	encoding;
+	const char *codeset;
+} codeset_map_array[] = {
+	{PG_UTF8, "UTF-8"},
+	{PG_LATIN1, "LATIN1"},
+	{PG_LATIN2, "LATIN2"},
+	{PG_LATIN3, "LATIN3"},
+	{PG_LATIN4, "LATIN4"},
+	{PG_ISO_8859_5, "ISO-8859-5"},
+	{PG_ISO_8859_6, "ISO_8859-6"},
+	{PG_ISO_8859_7, "ISO-8859-7"},
+	{PG_ISO_8859_8, "ISO-8859-8"},
+	{PG_LATIN5, "LATIN5"},
+	{PG_LATIN6, "LATIN6"},
+	{PG_LATIN7, "LATIN7"},
+	{PG_LATIN8, "LATIN8"},
+	{PG_LATIN9, "LATIN-9"},
+	{PG_LATIN10, "LATIN10"},
+	{PG_KOI8R, "KOI8-R"},
+	{PG_WIN1250, "CP1250"},
+	{PG_WIN1251, "CP1251"},
+	{PG_WIN1252, "CP1252"},
+	{PG_WIN1253, "CP1253"},
+	{PG_WIN1254, "CP1254"},
+	{PG_WIN1255, "CP1255"},
+	{PG_WIN1256, "CP1256"},
+	{PG_WIN1257, "CP1257"},
+	{PG_WIN1258, "CP1258"},
+	{PG_WIN866, "CP866"},
+	{PG_WIN874, "CP874"},
+	{PG_EUC_CN, "EUC-CN"},
+	{PG_EUC_JP, "EUC-JP"},
+	{PG_EUC_KR, "EUC-KR"},
+	{PG_EUC_TW, "EUC-TW"},
+	{PG_EUC_JIS_2004, "EUC-JP"}
+};
+#endif /* WIN32 */
+
 void
 SetDatabaseEncoding(int encoding)
 {
@@ -859,22 +899,23 @@ SetDatabaseEncoding(int encoding)
 	Assert(DatabaseEncoding->encoding == encoding);
 
 	/*
-	 * On Windows, we allow UTF-8 database encoding to be used with any
-	 * locale setting, because UTF-8 requires special handling anyway.
-	 * But this means that gettext() might be misled about what output
-	 * encoding it should use, so we have to tell it explicitly.
-	 *
-	 * In future we might want to call bind_textdomain_codeset
-	 * unconditionally, but that requires knowing how to spell the codeset
-	 * name properly for all encodings on all platforms, which might be
-	 * problematic.
-	 *
-	 * This is presently unnecessary, but harmless, on non-Windows platforms.
+	 * On Windows, we need to explicitly bind gettext to the correct
+	 * encoding, because gettext() tends to get confused.
 	 */
-#ifdef ENABLE_NLS
-	if (encoding == PG_UTF8)
-		if (bind_textdomain_codeset(textdomain(NULL), "UTF-8") == NULL)
-			elog(LOG, "bind_textdomain_codeset failed");
+#if defined(ENABLE_NLS) && defined(WIN32)
+	{
+		int	i;
+
+		for (i = 0; i < sizeof(codeset_map_array) / sizeof(codeset_map_array[0]); i++)
+		{
+			if (codeset_map_array[i].encoding == encoding)
+			{
+				if (bind_textdomain_codeset(textdomain(NULL), codeset_map_array[i].codeset) == NULL)
+					elog(LOG, "bind_textdomain_codeset failed");
+				break;
+			}
+		}
+	}
 #endif
 }