223 lines
7.4 KiB
C
223 lines
7.4 KiB
C
/*
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FUNCTION
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<<newlocale>>---create or modify a locale object
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INDEX
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newlocale
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INDEX
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_newlocale_r
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ANSI_SYNOPSIS
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#include <locale.h>
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locale_t newlocale(int <[category_mask]>, const char *<[locale]>,
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locale_t <[locobj]>);
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locale_t _newlocale_r(void *<[reent]>, int <[category_mask]>,
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const char *<[locale]>, locale_t <[locobj]>);
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DESCRIPTION
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The <<newlocale>> function shall create a new locale object or modify an
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existing one. If the base argument is (locale_t) <<0>>, a new locale
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object shall be created. It is unspecified whether the locale object
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pointed to by base shall be modified, or freed and a new locale object
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created.
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The category_mask argument specifies the locale categories to be set or
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modified. Values for category_mask shall be constructed by a
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bitwise-inclusive OR of the symbolic constants LC_CTYPE_MASK,
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LC_NUMERIC_MASK, LC_TIME_MASK, LC_COLLATE_MASK, LC_MONETARY_MASK, and
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LC_MESSAGES_MASK, or any of the other implementation-defined LC_*_MASK
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values defined in <locale.h>.
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For each category with the corresponding bit set in category_mask the
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data from the locale named by locale shall be used. In the case of
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modifying an existing locale object, the data from the locale named by
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locale shall replace the existing data within the locale object. If a
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completely new locale object is created, the data for all sections not
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requested by category_mask shall be taken from the default locale.
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The following preset values of locale are defined for all settings of
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category_mask:
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"POSIX" Specifies the minimal environment for C-language translation
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called the POSIX locale.
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"C" Equivalent to "POSIX".
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"" Specifies an implementation-defined native environment. This
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corresponds to the value of the associated environment variables,
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LC_* and LANG; see the Base Definitions volume of POSIX.1‐2008,
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Chapter 7, Locale and Chapter 8, Environment Variables.
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If the base argument is not (locale_t) <<0>> and the <<newlocale>>
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function call succeeds, the contents of base are unspecified.
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Applications shall ensure that they stop using base as a locale object
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before calling <<newlocale>>. If the function call fails and the base
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argument is not (locale_t) <<0>>, the contents of base shall remain
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valid and unchanged.
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The behavior is undefined if the base argument is the special locale
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object LC_GLOBAL_LOCALE, or is not a valid locale object handle and is
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not (locale_t) <<0>>.
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RETURNS
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Upon successful completion, the <<newlocale>> function shall return a
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handle which the caller may use on subsequent calls to <<duplocale>>,
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<<freelocale>>, and other functions taking a locale_t argument.
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Upon failure, the <<newlocale>> function shall return (locale_t) <<0>>
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and set errno to indicate the error.
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PORTABILITY
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<<newlocale>> is POSIX-1.2008.
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*/
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#include <newlib.h>
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#include <errno.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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#define LC_VALID_MASK (LC_COLLATE_MASK | LC_CTYPE_MASK | LC_MONETARY_MASK \
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| LC_NUMERIC_MASK | LC_TIME_MASK | LC_MESSAGES_MASK)
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struct __locale_t *
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_newlocale_r (struct _reent *p, int category_mask, const char *locale,
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struct __locale_t *base)
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{
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#ifndef _MB_CAPABLE
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return __get_C_locale ();
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#else /* _MB_CAPABLE */
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char new_categories[_LC_LAST][ENCODING_LEN + 1];
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struct __locale_t tmp_locale, *new_locale;
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int i;
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/* Convert LC_ALL_MASK to a mask containing all valid MASK values.
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This simplifies the code below. */
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if (category_mask & LC_ALL_MASK)
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{
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category_mask &= ~LC_ALL_MASK;
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category_mask |= LC_VALID_MASK;
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}
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/* Check for invalid mask values and valid locale ptr. */
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if ((category_mask & ~LC_VALID_MASK) || !locale)
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{
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p->_errno = EINVAL;
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return NULL;
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}
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/* If the new locale is supposed to be all default locale, just return
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a pointer to the default locale. */
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if ((!base && category_mask == 0)
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|| (category_mask == LC_VALID_MASK
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&& (!strcmp (locale, "C") || !strcmp (locale, "POSIX"))))
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return __get_C_locale ();
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/* Start with setting all values to the default locale values. */
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tmp_locale = *__get_C_locale ();
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/* Fill out new category strings. */
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for (i = 1; i < _LC_LAST; ++i)
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{
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if (((1 << i) & category_mask) != 0)
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{
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/* If locale is "", fetch from environment. Otherwise use locale
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name verbatim. */
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const char *cat = (locale[0] == '\0') ? __get_locale_env (p, i)
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: locale;
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if (strlen (cat) > ENCODING_LEN)
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{
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p->_errno = EINVAL;
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return NULL;
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}
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strcpy (new_categories[i], cat);
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}
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else
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strcpy (new_categories[i], base ? base->categories[i] : "C");
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}
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/* Now go over all categories and set them. */
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for (i = 1; i < _LC_LAST; ++i)
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{
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/* If we have a base locale, and the category is not in category_mask
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or the new category is the base categroy, just copy over. */
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if (base && (((1 << i) & category_mask) == 0
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|| !strcmp (base->categories[i], new_categories[i])))
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{
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strcpy (tmp_locale.categories[i], new_categories[i]);
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if (i == LC_CTYPE)
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{
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tmp_locale.wctomb = base->wctomb;
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tmp_locale.mbtowc = base->mbtowc;
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tmp_locale.cjk_lang = base->cjk_lang;
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tmp_locale.ctype_ptr - base->ctype_ptr;
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}
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#ifdef __HAVE_LOCALE_INFO__
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/* Mark the values as "has still to be copied". We do this in
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two steps to simplify freeing new locale types in case of a
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subsequent error. */
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tmp_locale.lc_cat[i].ptr = base->lc_cat[i].ptr;
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tmp_locale.lc_cat[i].buf = (void *) -1;
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#else /* !__HAVE_LOCALE_INFO__ */
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if (i == LC_CTYPE)
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strcpy (tmp_locale.ctype_codeset, base->ctype_codeset);
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else if (i == LC_MESSAGES)
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strcpy (tmp_locale.message_codeset, base->message_codeset);
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#endif /* !__HAVE_LOCALE_INFO__ */
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}
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/* Otherwise, if the category is in category_mask, create entry. */
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else if (((1 << i) & category_mask) != 0)
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{
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/* Nothing to do for "C"/"POSIX" locale. */
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if (!strcmp (new_categories[i], "C")
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|| !strcmp (new_categories[i], "POSIX"))
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continue;
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/* Otherwise load locale data. */
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else if (!__loadlocale (&tmp_locale, i, new_categories[i]))
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goto error;
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}
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}
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/* Allocate new locale_t. */
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new_locale = (struct __locale_t *) _calloc_r (p, 1, sizeof *new_locale);
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if (!new_locale)
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goto error;
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if (base)
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{
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#ifdef __HAVE_LOCALE_INFO__
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/* Step 2 of copying over.. Make sure to invalidate the copied buffer
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pointers in base, so the subsequent _freelocale_r (base) doesn't free
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the buffers now used in the new locale. */
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for (i = 1; i < _LC_LAST; ++i)
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if (tmp_locale.lc_cat[i].buf == (const void *) -1)
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{
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tmp_locale.lc_cat[i].buf = base->lc_cat[i].buf;
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base->lc_cat[i].ptr = base->lc_cat[i].buf = NULL;
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}
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#endif /* __HAVE_LOCALE_INFO__ */
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_freelocale_r (p, base);
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}
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*new_locale = tmp_locale;
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return new_locale;
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error:
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/* An error occured while we had already (potentially) allocated memory.
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Free memory and return NULL. errno is supposed to be set already. */
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#ifdef __HAVE_LOCALE_INFO__
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for (i = 1; i < _LC_LAST; ++i)
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if (((1 << i) & category_mask) != 0
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&& tmp_locale.lc_cat[i].buf
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&& tmp_locale.lc_cat[i].buf != (const void *) -1)
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{
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_free_r (p, (void *) tmp_locale.lc_cat[i].ptr);
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_free_r (p, tmp_locale.lc_cat[i].buf);
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}
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#endif /* __HAVE_LOCALE_INFO__ */
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return NULL;
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#endif /* _MB_CAPABLE */
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}
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struct __locale_t *
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newlocale (int category_mask, const char *locale, struct __locale_t *base)
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{
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return _newlocale_r (_REENT, category_mask, locale, base);
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}
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