* to_char:

- full support for IW (ISO week) and vice versa conversion for IW too
    (the to_char 'week' support is now complete and I hope correct).

  Thomas, I use for IW code from timestamp.c, for this I create separate
  function date2isoweek() from original 'case DTK_WEEK:' code in the
  timestamp_part(). I mean will better use one code for same feature in
  date_part() and in to_char(). The isoweek2date() is added to timestamp.c
  too. Right?

  IMHO in 7.1 will all to_char's features complete. It is cca 41 templates
  for date/time and cca 21 for numbers.

 * to_ascii:

   - gcc, is it correct now? :-)


  In the patch is documentation for to_char's IW and for to_ascii().

                                                        Karel

src/backend/utils/adt/pg_locale.c

@@ -2,7 +2,7 @@
 /* -----------------------------------------------------------------------
  * pg_locale.c
  *
- * $Header: /cvsroot/pgsql/src/backend/utils/adt/pg_locale.c,v 1.5 2000/06/29 01:19:36 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/pg_locale.c,v 1.6 2000/08/29 04:41:47 momjian Exp $
  *
  *
  *	 Portions Copyright (c) 1999-2000, PostgreSQL, Inc
@@ -26,6 +26,8 @@
 /* #define DEBUG_LOCALE_UTILS  */
 
 
+static struct lconv *CurrentLocaleConv = NULL;
+
 /*------
  * Return in PG_LocaleCategories current locale setting
  *------
@@ -119,7 +121,9 @@ struct lconv *
 PGLC_localeconv(void)
 {
 	PG_LocaleCategories lc;
-	struct lconv *lconv;
+	
+	if (CurrentLocaleConv)
+		return CurrentLocaleConv;
 
 	/* Save current locale setting to lc */
 	PGLC_current(&lc);
@@ -128,12 +132,12 @@ PGLC_localeconv(void)
 	setlocale(LC_ALL, "");
 
 	/* Get numeric formatting information */
-	lconv = localeconv();
+	CurrentLocaleConv = localeconv();
 
 	/* Set previous original locale */
 	PGLC_setlocale(&lc);
 
-	return lconv;
+	return CurrentLocaleConv;
 }