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/*-----------------------------------------------------------------------
*
* PostgreSQL locale utilities
*
* $Header: /cvsroot/pgsql/src/backend/utils/adt/pg_locale.c,v 1.16 2002/04/03 05:39:31 petere Exp $
*
* Portions Copyright (c) 2002, PostgreSQL Global Development Group
*
*-----------------------------------------------------------------------
*/
#include "postgres.h"
#include "utils/pg_locale.h"
#include <locale.h>
/* GUC storage area */
char * locale_messages;
char * locale_monetary;
char * locale_numeric;
char * locale_time;
/* GUC parse hooks */
bool locale_messages_check(const char *proposed)
{
#ifdef LC_MESSAGES
return chklocale(LC_MESSAGES, proposed);
#else
/* We return true here so LC_MESSAGES can be set in the
configuration file on every system. */
return true;
#endif
}
bool locale_monetary_check(const char *proposed)
{
return chklocale(LC_MONETARY, proposed);
}
bool locale_numeric_check(const char *proposed)
{
return chklocale(LC_NUMERIC, proposed);
}
bool locale_time_check(const char *proposed)
{
return chklocale(LC_TIME, proposed);
}
/* GUC assign hooks */
void locale_messages_assign(const char *value)
{
#ifdef LC_MESSAGES
setlocale(LC_MESSAGES, value);
#endif
}
void locale_monetary_assign(const char *value)
{
setlocale(LC_MONETARY, value);
}
void locale_numeric_assign(const char *value)
{
setlocale(LC_NUMERIC, value);
}
void locale_time_assign(const char *value)
{
setlocale(LC_TIME, value);
}
/*
* Returns true if the proposed string represents a valid locale of
* the given category. This is probably pretty slow, but it's not
* called in critical places.
*/
bool
chklocale(int category, const char *proposed)
{
char *save;
save = setlocale(category, NULL);
if (!save)
return false;
if (!setlocale(category, proposed))
return false;
setlocale(category, save);
return true;
}
/*
* We'd like to cache whether LC_COLLATE is C (or POSIX), so we can
* optimize a few code paths in various places.
*/
bool
lc_collate_is_c(void)
{
/* Cache result so we only have to compute it once */
static int result = -1;
char *localeptr;
if (result >= 0)
return (bool) result;
localeptr = setlocale(LC_COLLATE, NULL);
if (!localeptr)
elog(PANIC, "Invalid LC_COLLATE setting");
if (strcmp(localeptr, "C") == 0)
result = true;
else if (strcmp(localeptr, "POSIX") == 0)
result = true;
else
result = false;
return (bool) result;
}
/*
* Return the POSIX lconv struct (contains number/money formatting
* information) with locale information for all categories.
*/
struct lconv *
PGLC_localeconv(void)
{
struct lconv *extlconv;
static bool CurrentLocaleConvValid = false;
static struct lconv CurrentLocaleConv;
/* Did we do it already? */
if (CurrentLocaleConvValid)
return &CurrentLocaleConv;
/* Get formatting information for the external environment */
extlconv = localeconv();
/*
* Must copy all values since restoring internal settings may
* overwrite
*/
CurrentLocaleConv = *extlconv;
CurrentLocaleConv.currency_symbol = strdup(extlconv->currency_symbol);
CurrentLocaleConv.decimal_point = strdup(extlconv->decimal_point);
CurrentLocaleConv.grouping = strdup(extlconv->grouping);
CurrentLocaleConv.thousands_sep = strdup(extlconv->thousands_sep);
CurrentLocaleConv.int_curr_symbol = strdup(extlconv->int_curr_symbol);
CurrentLocaleConv.mon_decimal_point = strdup(extlconv->mon_decimal_point);
CurrentLocaleConv.mon_grouping = strdup(extlconv->mon_grouping);
CurrentLocaleConv.mon_thousands_sep = strdup(extlconv->mon_thousands_sep);
CurrentLocaleConv.negative_sign = strdup(extlconv->negative_sign);
CurrentLocaleConv.positive_sign = strdup(extlconv->positive_sign);
CurrentLocaleConvValid = true;
return &CurrentLocaleConv;
}
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