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/* Query the name of the current global locale, without locking.
Copyright (C) 2019-2024 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2019. */
#include <config.h>
/* Specification. */
#include "setlocale_null.h"
#include <errno.h>
#include <locale.h>
#include <string.h>
#if defined _WIN32 && !defined __CYGWIN__
# include <wchar.h>
#endif
/* Use the system's setlocale() function, not the gnulib override, here. */
#undef setlocale
const char *
setlocale_null_unlocked (int category)
{
const char *result = setlocale (category, NULL);
#ifdef __ANDROID__
if (result == NULL)
switch (category)
{
case LC_CTYPE:
case LC_NUMERIC:
case LC_TIME:
case LC_COLLATE:
case LC_MONETARY:
case LC_MESSAGES:
case LC_ALL:
case LC_PAPER:
case LC_NAME:
case LC_ADDRESS:
case LC_TELEPHONE:
case LC_MEASUREMENT:
result = "C";
break;
default:
break;
}
#endif
return result;
}
int
setlocale_null_r_unlocked (int category, char *buf, size_t bufsize)
{
#if defined _WIN32 && !defined __CYGWIN__ && defined _MSC_VER
/* On native Windows, nowadays, the setlocale() implementation is based
on _wsetlocale() and uses malloc() for the result. We are better off
using _wsetlocale() directly. */
const wchar_t *result = _wsetlocale (category, NULL);
if (result == NULL)
{
/* CATEGORY is invalid. */
if (bufsize > 0)
/* Return an empty string in BUF.
This is a convenience for callers that don't want to write explicit
code for handling EINVAL. */
buf[0] = '\0';
return EINVAL;
}
else
{
size_t length = wcslen (result);
if (length < bufsize)
{
size_t i;
/* Convert wchar_t[] -> char[], assuming plain ASCII. */
for (i = 0; i <= length; i++)
buf[i] = result[i];
return 0;
}
else
{
if (bufsize > 0)
{
/* Return a truncated result in BUF.
This is a convenience for callers that don't want to write
explicit code for handling ERANGE. */
size_t i;
/* Convert wchar_t[] -> char[], assuming plain ASCII. */
for (i = 0; i < bufsize; i++)
buf[i] = result[i];
buf[bufsize - 1] = '\0';
}
return ERANGE;
}
}
#else
const char *result = setlocale_null_unlocked (category);
if (result == NULL)
{
/* CATEGORY is invalid. */
if (bufsize > 0)
/* Return an empty string in BUF.
This is a convenience for callers that don't want to write explicit
code for handling EINVAL. */
buf[0] = '\0';
return EINVAL;
}
else
{
size_t length = strlen (result);
if (length < bufsize)
{
memcpy (buf, result, length + 1);
return 0;
}
else
{
if (bufsize > 0)
{
/* Return a truncated result in BUF.
This is a convenience for callers that don't want to write
explicit code for handling ERANGE. */
memcpy (buf, result, bufsize - 1);
buf[bufsize - 1] = '\0';
}
return ERANGE;
}
}
#endif
}
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