2016-08-15 23:34:40 +08:00
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/*
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FUNCTION
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<<uselocale>>---free resources allocated for a locale object
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INDEX
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uselocale
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INDEX
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_uselocale_r
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ANSI_SYNOPSIS
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#include <locale.h>
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locale_t uselocale(locale_t <[locobj]>);
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locale_t _uselocale_r(void *<[reent]>, locale_t <[locobj]>);
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DESCRIPTION
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The <<uselocale>> function shall set the current locale for the current
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thread to the locale represented by newloc.
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The value for the newloc argument shall be one of the following:
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1. A value returned by the <<newlocale>> or <<duplocale>> functions
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2. The special locale object descriptor LC_GLOBAL_LOCALE
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3. (locale_t) <<0>>
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Once the <<uselocale>> function has been called to install a thread-local
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locale, the behavior of every interface using data from the current
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locale shall be affected for the calling thread. The current locale for
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other threads shall remain unchanged.
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If the newloc argument is (locale_t) <<0>>, the object returned is the
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current locale or LC_GLOBAL_LOCALE if there has been no previous call to
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<<uselocale>> for the current thread.
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If the newloc argument is LC_GLOBAL_LOCALE, the thread shall use the
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global locale determined by the <<setlocale>> function.
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RETURNS
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Upon successful completion, the <<uselocale>> function shall return the
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locale handle from the previous call for the current thread, or
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LC_GLOBAL_LOCALE if there was no such previous call. Otherwise,
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<<uselocale>> shall return (locale_t) <<0>> and set errno to indicate
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the error.
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PORTABILITY
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<<uselocale>> is POSIX-1.2008.
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*/
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2016-07-24 03:40:50 +08:00
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#include <newlib.h>
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#include <reent.h>
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#include <stdlib.h>
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#include "setlocale.h"
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struct __locale_t *
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_uselocale_r (struct _reent *p, struct __locale_t *newloc)
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{
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struct __locale_t *current_locale;
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current_locale = __get_locale_r (p);
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if (!current_locale)
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current_locale = LC_GLOBAL_LOCALE;
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if (newloc == LC_GLOBAL_LOCALE)
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p->_locale = NULL;
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else if (newloc)
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p->_locale = newloc;
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return current_locale;
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}
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#ifndef _REENT_ONLY
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struct __locale_t *
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uselocale (struct __locale_t *newloc)
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{
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return _uselocale_r (_REENT, newloc);
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}
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#endif
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