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/* -----------------------------------------------------------------------
* pg_locale.c
*
* The PostgreSQL locale utils.
*
*
* $Header: /cvsroot/pgsql/src/backend/utils/adt/pg_locale.c,v 1.9 2001/03/22 03:59:52 momjian Exp $
*
* Portions Copyright (c) 1999-2000, PostgreSQL Global Development Group
*
* Karel Zak - Zakkr
*
* -----------------------------------------------------------------------
*/
#include "postgres.h"
#ifdef USE_LOCALE
#include <locale.h>
#include "utils/pg_locale.h"
/* #define DEBUG_LOCALE_UTILS */
static struct lconv *CurrentLocaleConv = NULL;
static void PGLC_setlocale(PG_LocaleCategories * lc);
/*------
* Return in PG_LocaleCategories the current locale settings
*------
*/
void
PGLC_current(PG_LocaleCategories * lc)
{
lc->lang = getenv("LANG");
lc->lc_ctype = setlocale(LC_CTYPE, NULL);
lc->lc_numeric = setlocale(LC_NUMERIC, NULL);
lc->lc_time = setlocale(LC_TIME, NULL);
lc->lc_collate = setlocale(LC_COLLATE, NULL);
lc->lc_monetary = setlocale(LC_MONETARY, NULL);
#ifdef LC_MESSAGES
lc->lc_messages = setlocale(LC_MESSAGES, NULL);
#endif
}
#ifdef DEBUG_LOCALE_UTILS
/*------
* Print a PG_LocaleCategories struct as DEBUG
*------
*/
static void
PGLC_debug_lc(PG_LocaleCategories * lc)
{
#ifdef LC_MESSAGES
elog(DEBUG, "CURRENT LOCALE ENVIRONMENT:\n\nLANG: \t%s\nLC_CTYPE:\t%s\nLC_NUMERIC:\t%s\nLC_TIME:\t%s\nLC_COLLATE:\t%s\nLC_MONETARY:\t%s\nLC_MESSAGES:\t%s\n",
#else
elog(DEBUG, "CURRENT LOCALE ENVIRONMENT:\n\nLANG: \t%s\nLC_CTYPE:\t%s\nLC_NUMERIC:\t%s\nLC_TIME:\t%s\nLC_COLLATE:\t%s\nLC_MONETARY:\t%s\n",
#endif
lc->lang,
lc->lc_ctype,
lc->lc_numeric,
lc->lc_time,
lc->lc_collate,
lc->lc_monetary
#ifdef LC_MESSAGES
,lc->lc_messages
#endif
);
}
#endif
/*------
* Set locales via a PG_LocaleCategories struct
*
* NB: it would be very dangerous to set the locale values to any random
* choice of locale, since that could cause indexes to become corrupt, etc.
* Therefore this routine is NOT exported from this module. It should be
* used only to restore previous locale settings during PGLC_localeconv.
*------
*/
static void
PGLC_setlocale(PG_LocaleCategories * lc)
{
if (!setlocale(LC_COLLATE, lc->lc_collate))
elog(NOTICE, "pg_setlocale(): 'LC_COLLATE=%s' cannot be honored.",
lc->lc_collate);
if (!setlocale(LC_CTYPE, lc->lc_ctype))
elog(NOTICE, "pg_setlocale(): 'LC_CTYPE=%s' cannot be honored.",
lc->lc_ctype);
if (!setlocale(LC_NUMERIC, lc->lc_numeric))
elog(NOTICE, "pg_setlocale(): 'LC_NUMERIC=%s' cannot be honored.",
lc->lc_numeric);
if (!setlocale(LC_TIME, lc->lc_time))
elog(NOTICE, "pg_setlocale(): 'LC_TIME=%s' cannot be honored.",
lc->lc_time);
if (!setlocale(LC_MONETARY, lc->lc_monetary))
elog(NOTICE, "pg_setlocale(): 'LC_MONETARY=%s' cannot be honored.",
lc->lc_monetary);
#ifdef LC_MESSAGES
if (!setlocale(LC_MESSAGES, lc->lc_messages))
elog(NOTICE, "pg_setlocale(): 'LC_MESSAGE=%s' cannot be honored.",
lc->lc_messages);
#endif
}
/*------
* Return the POSIX lconv struct (contains number/money formatting information)
* with locale information for all categories. Note that returned lconv
* does not depend on currently active category settings, but on external
* environment variables for locale.
*
* XXX we assume that restoring old category settings via setlocale() will
* not immediately corrupt the static data returned by localeconv().
* How portable is this?
*
* XXX in any case, there certainly must not be any other calls to
* localeconv() anywhere in the backend, else the values reported here
* will be overwritten with the Postgres-internal locale settings.
*------
*/
struct lconv *
PGLC_localeconv(void)
{
PG_LocaleCategories lc;
/* Did we do it already? */
if (CurrentLocaleConv)
return CurrentLocaleConv;
/* Save current locale setting to lc */
PGLC_current(&lc);
/* Set all locale categories based on postmaster's environment vars */
setlocale(LC_ALL, "");
/* Get formatting information for the external environment */
CurrentLocaleConv = localeconv();
/* Restore Postgres' internal locale settings */
PGLC_setlocale(&lc);
return CurrentLocaleConv;
}
#endif /* USE_LOCALE */
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