573 lines
15 KiB
C
573 lines
15 KiB
C
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/* nl_langinfo() replacement: query locale dependent information.
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Copyright (C) 2007-2023 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <langinfo.h>
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#include <locale.h>
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#include <stdlib.h>
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#include <string.h>
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#if defined _WIN32 && ! defined __CYGWIN__
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# define WIN32_LEAN_AND_MEAN /* avoid including junk */
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# include <windows.h>
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# include <stdio.h>
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#endif
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#if REPLACE_NL_LANGINFO && !NL_LANGINFO_MTSAFE
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# if defined _WIN32 && !defined __CYGWIN__
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# define WIN32_LEAN_AND_MEAN /* avoid including junk */
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# include <windows.h>
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# elif HAVE_PTHREAD_API
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# include <pthread.h>
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# if HAVE_THREADS_H && HAVE_WEAK_SYMBOLS
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# include <threads.h>
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# pragma weak thrd_exit
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# define c11_threads_in_use() (thrd_exit != NULL)
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# else
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# define c11_threads_in_use() 0
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# endif
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# elif HAVE_THREADS_H
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# include <threads.h>
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# endif
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#endif
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/* nl_langinfo() must be multithread-safe. To achieve this without using
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thread-local storage:
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1. We use a specific static buffer for each possible argument.
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So that different threads can call nl_langinfo with different arguments,
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without interfering.
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2. We use a simple strcpy or memcpy to fill this static buffer. Filling it
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through, for example, strcpy + strcat would not be guaranteed to leave
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the buffer's contents intact if another thread is currently accessing
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it. If necessary, the contents is first assembled in a stack-allocated
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buffer. */
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#if !REPLACE_NL_LANGINFO || GNULIB_defined_CODESET
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/* Return the codeset of the current locale, if this is easily deducible.
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Otherwise, return "". */
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static char *
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ctype_codeset (void)
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{
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static char result[2 + 10 + 1];
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char buf[2 + 10 + 1];
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char locale[SETLOCALE_NULL_MAX];
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char *codeset;
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size_t codesetlen;
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if (setlocale_null_r (LC_CTYPE, locale, sizeof (locale)))
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locale[0] = '\0';
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codeset = buf;
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codeset[0] = '\0';
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if (locale[0])
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{
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/* If the locale name contains an encoding after the dot, return it. */
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char *dot = strchr (locale, '.');
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if (dot)
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{
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/* Look for the possible @... trailer and remove it, if any. */
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char *codeset_start = dot + 1;
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char const *modifier = strchr (codeset_start, '@');
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if (! modifier)
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codeset = codeset_start;
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else
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{
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codesetlen = modifier - codeset_start;
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if (codesetlen < sizeof buf)
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{
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codeset = memcpy (buf, codeset_start, codesetlen);
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codeset[codesetlen] = '\0';
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}
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}
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}
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}
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# if defined _WIN32 && ! defined __CYGWIN__
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/* If setlocale is successful, it returns the number of the
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codepage, as a string. Otherwise, fall back on Windows API
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GetACP, which returns the locale's codepage as a number (although
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this doesn't change according to what the 'setlocale' call specified).
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Either way, prepend "CP" to make it a valid codeset name. */
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codesetlen = strlen (codeset);
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if (0 < codesetlen && codesetlen < sizeof buf - 2)
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memmove (buf + 2, codeset, codesetlen + 1);
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else
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sprintf (buf + 2, "%u", GetACP ());
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/* For a locale name such as "French_France.65001", in Windows 10,
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setlocale now returns "French_France.utf8" instead. */
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if (strcmp (buf + 2, "65001") == 0 || strcmp (buf + 2, "utf8") == 0)
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return (char *) "UTF-8";
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else
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{
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memcpy (buf, "CP", 2);
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strcpy (result, buf);
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return result;
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}
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# else
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strcpy (result, codeset);
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return result;
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#endif
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}
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#endif
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#if REPLACE_NL_LANGINFO
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/* Override nl_langinfo with support for added nl_item values. */
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# undef nl_langinfo
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/* Without locking, on Solaris 11.3, test-nl_langinfo-mt fails, with message
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"thread5 disturbed by threadN!", even when threadN invokes only
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nl_langinfo (CODESET);
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nl_langinfo (CRNCYSTR);
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Similarly on Solaris 10. */
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# if !NL_LANGINFO_MTSAFE /* Solaris */
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# define ITEMS (MAXSTRMSG + 1)
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# define MAX_RESULT_LEN 80
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static char *
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nl_langinfo_unlocked (nl_item item)
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{
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static char result[ITEMS][MAX_RESULT_LEN];
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/* The result of nl_langinfo is in storage that can be overwritten by
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other calls to nl_langinfo. */
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char *tmp = nl_langinfo (item);
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if (item >= 0 && item < ITEMS && tmp != NULL)
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{
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size_t tmp_len = strlen (tmp);
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if (tmp_len < MAX_RESULT_LEN)
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strcpy (result[item], tmp);
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else
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{
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/* Produce a truncated result. Oh well... */
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result[item][MAX_RESULT_LEN - 1] = '\0';
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memcpy (result[item], tmp, MAX_RESULT_LEN - 1);
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}
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return result[item];
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}
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else
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return tmp;
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}
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/* Use a lock, so that no two threads can invoke nl_langinfo_unlocked
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at the same time. */
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/* Prohibit renaming this symbol. */
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# undef gl_get_nl_langinfo_lock
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# if defined _WIN32 && !defined __CYGWIN__
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extern __declspec(dllimport) CRITICAL_SECTION *gl_get_nl_langinfo_lock (void);
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static char *
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nl_langinfo_with_lock (nl_item item)
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{
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CRITICAL_SECTION *lock = gl_get_nl_langinfo_lock ();
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char *ret;
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EnterCriticalSection (lock);
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ret = nl_langinfo_unlocked (item);
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LeaveCriticalSection (lock);
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return ret;
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}
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# elif HAVE_PTHREAD_API
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extern
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# if defined _WIN32 || defined __CYGWIN__
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__declspec(dllimport)
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# endif
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pthread_mutex_t *gl_get_nl_langinfo_lock (void);
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# if HAVE_WEAK_SYMBOLS /* musl libc, FreeBSD, NetBSD, OpenBSD, Haiku */
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/* Avoid the need to link with '-lpthread'. */
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# pragma weak pthread_mutex_lock
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# pragma weak pthread_mutex_unlock
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/* Determine whether libpthread is in use. */
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# pragma weak pthread_mutexattr_gettype
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/* See the comments in lock.h. */
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# define pthread_in_use() \
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(pthread_mutexattr_gettype != NULL || c11_threads_in_use ())
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# else
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# define pthread_in_use() 1
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# endif
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static char *
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nl_langinfo_with_lock (nl_item item)
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{
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if (pthread_in_use())
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{
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pthread_mutex_t *lock = gl_get_nl_langinfo_lock ();
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char *ret;
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if (pthread_mutex_lock (lock))
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abort ();
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ret = nl_langinfo_unlocked (item);
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if (pthread_mutex_unlock (lock))
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abort ();
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return ret;
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}
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else
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return nl_langinfo_unlocked (item);
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}
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# elif HAVE_THREADS_H
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extern mtx_t *gl_get_nl_langinfo_lock (void);
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static char *
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nl_langinfo_with_lock (nl_item item)
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{
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mtx_t *lock = gl_get_nl_langinfo_lock ();
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char *ret;
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if (mtx_lock (lock) != thrd_success)
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abort ();
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ret = nl_langinfo_unlocked (item);
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if (mtx_unlock (lock) != thrd_success)
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abort ();
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return ret;
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}
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# endif
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# else
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/* On other platforms, no lock is needed. */
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# define nl_langinfo_with_lock nl_langinfo
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# endif
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char *
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rpl_nl_langinfo (nl_item item)
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{
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switch (item)
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{
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# if GNULIB_defined_CODESET
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case CODESET:
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return ctype_codeset ();
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# endif
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# if GNULIB_defined_T_FMT_AMPM
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case T_FMT_AMPM:
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return (char *) "%I:%M:%S %p";
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# endif
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# if GNULIB_defined_ALTMON
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case ALTMON_1:
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case ALTMON_2:
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case ALTMON_3:
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case ALTMON_4:
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case ALTMON_5:
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case ALTMON_6:
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case ALTMON_7:
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case ALTMON_8:
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case ALTMON_9:
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case ALTMON_10:
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case ALTMON_11:
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case ALTMON_12:
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/* We don't ship the appropriate localizations with gnulib. Therefore,
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treat ALTMON_i like MON_i. */
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item = item - ALTMON_1 + MON_1;
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break;
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# endif
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# if GNULIB_defined_ERA
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case ERA:
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/* The format is not standardized. In glibc it is a sequence of strings
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of the form "direction:offset:start_date:end_date:era_name:era_format"
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with an empty string at the end. */
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return (char *) "";
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case ERA_D_FMT:
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/* The %Ex conversion in strftime behaves like %x if the locale does not
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have an alternative time format. */
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item = D_FMT;
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break;
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case ERA_D_T_FMT:
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/* The %Ec conversion in strftime behaves like %c if the locale does not
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have an alternative time format. */
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item = D_T_FMT;
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break;
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case ERA_T_FMT:
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/* The %EX conversion in strftime behaves like %X if the locale does not
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have an alternative time format. */
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item = T_FMT;
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break;
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case ALT_DIGITS:
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/* The format is not standardized. In glibc it is a sequence of 10
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strings, appended in memory. */
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return (char *) "\0\0\0\0\0\0\0\0\0\0";
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# endif
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# if GNULIB_defined_YESEXPR || !FUNC_NL_LANGINFO_YESEXPR_WORKS
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case YESEXPR:
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return (char *) "^[yY]";
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case NOEXPR:
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return (char *) "^[nN]";
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# endif
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default:
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break;
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}
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return nl_langinfo_with_lock (item);
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}
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#else
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/* Provide nl_langinfo from scratch, either for native MS-Windows, or
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for old Unix platforms without locales, such as Linux libc5 or
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BeOS. */
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# include <time.h>
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char *
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nl_langinfo (nl_item item)
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{
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char buf[100];
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struct tm tmm = { 0 };
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switch (item)
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{
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/* nl_langinfo items of the LC_CTYPE category */
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case CODESET:
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{
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char *codeset = ctype_codeset ();
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if (*codeset)
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return codeset;
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}
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# ifdef __BEOS__
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return (char *) "UTF-8";
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# else
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return (char *) "ISO-8859-1";
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# endif
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/* nl_langinfo items of the LC_NUMERIC category */
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case RADIXCHAR:
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return localeconv () ->decimal_point;
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case THOUSEP:
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return localeconv () ->thousands_sep;
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# ifdef GROUPING
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case GROUPING:
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return localeconv () ->grouping;
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# endif
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/* nl_langinfo items of the LC_TIME category.
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TODO: Really use the locale. */
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case D_T_FMT:
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case ERA_D_T_FMT:
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return (char *) "%a %b %e %H:%M:%S %Y";
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case D_FMT:
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case ERA_D_FMT:
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return (char *) "%m/%d/%y";
|
||
|
|
case T_FMT:
|
||
|
|
case ERA_T_FMT:
|
||
|
|
return (char *) "%H:%M:%S";
|
||
|
|
case T_FMT_AMPM:
|
||
|
|
return (char *) "%I:%M:%S %p";
|
||
|
|
case AM_STR:
|
||
|
|
{
|
||
|
|
static char result[80];
|
||
|
|
if (!strftime (buf, sizeof result, "%p", &tmm))
|
||
|
|
return (char *) "AM";
|
||
|
|
strcpy (result, buf);
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
case PM_STR:
|
||
|
|
{
|
||
|
|
static char result[80];
|
||
|
|
tmm.tm_hour = 12;
|
||
|
|
if (!strftime (buf, sizeof result, "%p", &tmm))
|
||
|
|
return (char *) "PM";
|
||
|
|
strcpy (result, buf);
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
case DAY_1:
|
||
|
|
case DAY_2:
|
||
|
|
case DAY_3:
|
||
|
|
case DAY_4:
|
||
|
|
case DAY_5:
|
||
|
|
case DAY_6:
|
||
|
|
case DAY_7:
|
||
|
|
{
|
||
|
|
static char result[7][50];
|
||
|
|
static char const days[][sizeof "Wednesday"] = {
|
||
|
|
"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday",
|
||
|
|
"Friday", "Saturday"
|
||
|
|
};
|
||
|
|
tmm.tm_wday = item - DAY_1;
|
||
|
|
if (!strftime (buf, sizeof result[0], "%A", &tmm))
|
||
|
|
return (char *) days[item - DAY_1];
|
||
|
|
strcpy (result[item - DAY_1], buf);
|
||
|
|
return result[item - DAY_1];
|
||
|
|
}
|
||
|
|
case ABDAY_1:
|
||
|
|
case ABDAY_2:
|
||
|
|
case ABDAY_3:
|
||
|
|
case ABDAY_4:
|
||
|
|
case ABDAY_5:
|
||
|
|
case ABDAY_6:
|
||
|
|
case ABDAY_7:
|
||
|
|
{
|
||
|
|
static char result[7][30];
|
||
|
|
static char const abdays[][sizeof "Sun"] = {
|
||
|
|
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
|
||
|
|
};
|
||
|
|
tmm.tm_wday = item - ABDAY_1;
|
||
|
|
if (!strftime (buf, sizeof result[0], "%a", &tmm))
|
||
|
|
return (char *) abdays[item - ABDAY_1];
|
||
|
|
strcpy (result[item - ABDAY_1], buf);
|
||
|
|
return result[item - ABDAY_1];
|
||
|
|
}
|
||
|
|
{
|
||
|
|
static char const months[][sizeof "September"] = {
|
||
|
|
"January", "February", "March", "April", "May", "June", "July",
|
||
|
|
"September", "October", "November", "December"
|
||
|
|
};
|
||
|
|
case MON_1:
|
||
|
|
case MON_2:
|
||
|
|
case MON_3:
|
||
|
|
case MON_4:
|
||
|
|
case MON_5:
|
||
|
|
case MON_6:
|
||
|
|
case MON_7:
|
||
|
|
case MON_8:
|
||
|
|
case MON_9:
|
||
|
|
case MON_10:
|
||
|
|
case MON_11:
|
||
|
|
case MON_12:
|
||
|
|
{
|
||
|
|
static char result[12][50];
|
||
|
|
tmm.tm_mon = item - MON_1;
|
||
|
|
if (!strftime (buf, sizeof result[0], "%B", &tmm))
|
||
|
|
return (char *) months[item - MON_1];
|
||
|
|
strcpy (result[item - MON_1], buf);
|
||
|
|
return result[item - MON_1];
|
||
|
|
}
|
||
|
|
case ALTMON_1:
|
||
|
|
case ALTMON_2:
|
||
|
|
case ALTMON_3:
|
||
|
|
case ALTMON_4:
|
||
|
|
case ALTMON_5:
|
||
|
|
case ALTMON_6:
|
||
|
|
case ALTMON_7:
|
||
|
|
case ALTMON_8:
|
||
|
|
case ALTMON_9:
|
||
|
|
case ALTMON_10:
|
||
|
|
case ALTMON_11:
|
||
|
|
case ALTMON_12:
|
||
|
|
{
|
||
|
|
static char result[12][50];
|
||
|
|
tmm.tm_mon = item - ALTMON_1;
|
||
|
|
/* The platforms without nl_langinfo() don't support strftime with
|
||
|
|
%OB. We don't even need to try. */
|
||
|
|
#if 0
|
||
|
|
if (!strftime (buf, sizeof result[0], "%OB", &tmm))
|
||
|
|
#endif
|
||
|
|
if (!strftime (buf, sizeof result[0], "%B", &tmm))
|
||
|
|
return (char *) months[item - ALTMON_1];
|
||
|
|
strcpy (result[item - ALTMON_1], buf);
|
||
|
|
return result[item - ALTMON_1];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
case ABMON_1:
|
||
|
|
case ABMON_2:
|
||
|
|
case ABMON_3:
|
||
|
|
case ABMON_4:
|
||
|
|
case ABMON_5:
|
||
|
|
case ABMON_6:
|
||
|
|
case ABMON_7:
|
||
|
|
case ABMON_8:
|
||
|
|
case ABMON_9:
|
||
|
|
case ABMON_10:
|
||
|
|
case ABMON_11:
|
||
|
|
case ABMON_12:
|
||
|
|
{
|
||
|
|
static char result[12][30];
|
||
|
|
static char const abmonths[][sizeof "Jan"] = {
|
||
|
|
"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
|
||
|
|
"Sep", "Oct", "Nov", "Dec"
|
||
|
|
};
|
||
|
|
tmm.tm_mon = item - ABMON_1;
|
||
|
|
if (!strftime (buf, sizeof result[0], "%b", &tmm))
|
||
|
|
return (char *) abmonths[item - ABMON_1];
|
||
|
|
strcpy (result[item - ABMON_1], buf);
|
||
|
|
return result[item - ABMON_1];
|
||
|
|
}
|
||
|
|
case ERA:
|
||
|
|
return (char *) "";
|
||
|
|
case ALT_DIGITS:
|
||
|
|
return (char *) "\0\0\0\0\0\0\0\0\0\0";
|
||
|
|
/* nl_langinfo items of the LC_MONETARY category. */
|
||
|
|
case CRNCYSTR:
|
||
|
|
return localeconv () ->currency_symbol;
|
||
|
|
# ifdef INT_CURR_SYMBOL
|
||
|
|
case INT_CURR_SYMBOL:
|
||
|
|
return localeconv () ->int_curr_symbol;
|
||
|
|
case MON_DECIMAL_POINT:
|
||
|
|
return localeconv () ->mon_decimal_point;
|
||
|
|
case MON_THOUSANDS_SEP:
|
||
|
|
return localeconv () ->mon_thousands_sep;
|
||
|
|
case MON_GROUPING:
|
||
|
|
return localeconv () ->mon_grouping;
|
||
|
|
case POSITIVE_SIGN:
|
||
|
|
return localeconv () ->positive_sign;
|
||
|
|
case NEGATIVE_SIGN:
|
||
|
|
return localeconv () ->negative_sign;
|
||
|
|
case FRAC_DIGITS:
|
||
|
|
return & localeconv () ->frac_digits;
|
||
|
|
case INT_FRAC_DIGITS:
|
||
|
|
return & localeconv () ->int_frac_digits;
|
||
|
|
case P_CS_PRECEDES:
|
||
|
|
return & localeconv () ->p_cs_precedes;
|
||
|
|
case N_CS_PRECEDES:
|
||
|
|
return & localeconv () ->n_cs_precedes;
|
||
|
|
case P_SEP_BY_SPACE:
|
||
|
|
return & localeconv () ->p_sep_by_space;
|
||
|
|
case N_SEP_BY_SPACE:
|
||
|
|
return & localeconv () ->n_sep_by_space;
|
||
|
|
case P_SIGN_POSN:
|
||
|
|
return & localeconv () ->p_sign_posn;
|
||
|
|
case N_SIGN_POSN:
|
||
|
|
return & localeconv () ->n_sign_posn;
|
||
|
|
# endif
|
||
|
|
/* nl_langinfo items of the LC_MESSAGES category
|
||
|
|
TODO: Really use the locale. */
|
||
|
|
case YESEXPR:
|
||
|
|
return (char *) "^[yY]";
|
||
|
|
case NOEXPR:
|
||
|
|
return (char *) "^[nN]";
|
||
|
|
default:
|
||
|
|
return (char *) "";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|