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f0811a74b3
GUC support. It's now possible to set datestyle, timezone, and client_encoding from postgresql.conf and per-database or per-user settings. Also, implement rollback of SET commands that occur in a transaction that later fails. Create a SET LOCAL var = value syntax that sets the variable only for the duration of the current transaction. All per previous discussions in pghackers.
148 lines
3.5 KiB
C
148 lines
3.5 KiB
C
/*-----------------------------------------------------------------------
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*
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* PostgreSQL locale utilities
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*
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/pg_locale.c,v 1.17 2002/05/17 01:19:18 tgl Exp $
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*
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* Portions Copyright (c) 2002, PostgreSQL Global Development Group
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*
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*-----------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include <locale.h>
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#include "utils/pg_locale.h"
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/* GUC storage area */
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char *locale_messages;
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char *locale_monetary;
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char *locale_numeric;
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char *locale_time;
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/* GUC assign hooks */
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static const char *
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locale_xxx_assign(int category, const char *value, bool doit, bool interactive)
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{
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if (doit)
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{
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if (!setlocale(category, value))
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return NULL;
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}
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else
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{
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char *save;
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save = setlocale(category, NULL);
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if (!save)
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return NULL;
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if (!setlocale(category, value))
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return NULL;
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setlocale(category, save);
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}
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return value;
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}
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const char *
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locale_messages_assign(const char *value, bool doit, bool interactive)
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{
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/* LC_MESSAGES category does not exist everywhere, but accept it anyway */
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#ifdef LC_MESSAGES
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return locale_xxx_assign(LC_MESSAGES, value, doit, interactive);
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#else
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return value;
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#endif
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}
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const char *
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locale_monetary_assign(const char *value, bool doit, bool interactive)
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{
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return locale_xxx_assign(LC_MONETARY, value, doit, interactive);
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}
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const char *
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locale_numeric_assign(const char *value, bool doit, bool interactive)
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{
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return locale_xxx_assign(LC_NUMERIC, value, doit, interactive);
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}
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const char *
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locale_time_assign(const char *value, bool doit, bool interactive)
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{
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return locale_xxx_assign(LC_TIME, value, doit, interactive);
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}
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/*
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* We'd like to cache whether LC_COLLATE is C (or POSIX), so we can
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* optimize a few code paths in various places.
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*/
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bool
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lc_collate_is_c(void)
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{
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/* Cache result so we only have to compute it once */
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static int result = -1;
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char *localeptr;
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if (result >= 0)
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return (bool) result;
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localeptr = setlocale(LC_COLLATE, NULL);
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if (!localeptr)
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elog(PANIC, "Invalid LC_COLLATE setting");
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if (strcmp(localeptr, "C") == 0)
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result = true;
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else if (strcmp(localeptr, "POSIX") == 0)
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result = true;
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else
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result = false;
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return (bool) result;
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}
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/*
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* Return the POSIX lconv struct (contains number/money formatting
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* information) with locale information for all categories.
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*/
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struct lconv *
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PGLC_localeconv(void)
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{
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static bool CurrentLocaleConvValid = false;
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static struct lconv CurrentLocaleConv;
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struct lconv *extlconv;
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/* Did we do it already? */
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if (CurrentLocaleConvValid)
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return &CurrentLocaleConv;
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/* Get formatting information for the external environment */
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extlconv = localeconv();
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/*
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* Must copy all values since restoring internal settings may
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* overwrite
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*/
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CurrentLocaleConv = *extlconv;
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CurrentLocaleConv.currency_symbol = strdup(extlconv->currency_symbol);
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CurrentLocaleConv.decimal_point = strdup(extlconv->decimal_point);
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CurrentLocaleConv.grouping = strdup(extlconv->grouping);
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CurrentLocaleConv.thousands_sep = strdup(extlconv->thousands_sep);
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CurrentLocaleConv.int_curr_symbol = strdup(extlconv->int_curr_symbol);
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CurrentLocaleConv.mon_decimal_point = strdup(extlconv->mon_decimal_point);
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CurrentLocaleConv.mon_grouping = strdup(extlconv->mon_grouping);
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CurrentLocaleConv.mon_thousands_sep = strdup(extlconv->mon_thousands_sep);
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CurrentLocaleConv.negative_sign = strdup(extlconv->negative_sign);
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CurrentLocaleConv.positive_sign = strdup(extlconv->positive_sign);
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CurrentLocaleConvValid = true;
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return &CurrentLocaleConv;
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}
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