/*-

 * Copyright (c) 1988, 1993

 *	The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 * Portions Copyright (c) 2005-2007 Nokia Corporation and/or its subsidiary(-ies).All rights reserved. 

 */

#if defined(LIBC_SCCS) && !defined(lint)

static char sccsid[] = "@(#)strerror.c	8.1 (Berkeley) 6/4/93";

#endif /* LIBC_SCCS and not lint */

#include <sys/cdefs.h>

#ifndef __SYMBIAN32__

__FBSDID("$FreeBSD: src/lib/libc/string/strerror.c,v 1.15 2005/02/27 21:17:22 phantom Exp $");

#endif

#if defined(NLS)

#include <nl_types.h>

#endif

#include <limits.h>

#include <errno.h>

#include <string.h>

#include <stdio.h>

#include <wchar.h>

#include <stdlib.h>

#if (defined(__SYMBIAN32__) && (defined(__WINSCW__) || defined(__WINS__)))

#include "libc_wsd_defs.h"

#endif

#ifdef __SYMBIAN32__

/* Provide the declarations for `sys_errlist' and `sys_nerr' if they

 * are available on this system.  Even if available, these variables

 * should not be used directly.  The `strerror' function provides

 * all the necessary functionality.

*/

extern __const int sys_nerr;

extern __const char *__const sys_errlist[];

#endif /* __SYMBIAN32__ */

#define	UPREFIX		"Unknown error"

/*

 * Define a buffer size big enough to describe a 64-bit signed integer

 * converted to ASCII decimal (19 bytes), with an optional leading sign

 * (1 byte); finally, we get the prefix, delimiter (": ") and a trailing

 * NUL from UPREFIX.

 */

#define	EBUFSIZE	(20 + 2 + sizeof(UPREFIX))

#ifdef EMULATOR

GET_STATIC_ARRAY_FROM_TLS(ebuf, char)

#define ebuf (GET_WSD_VAR_NAME(ebuf, s)())

#endif //EMULATOR

/*

 * Doing this by hand instead of linking with stdio(3) avoids bloat for

 * statically linked binaries.

 */

static void

errstr(int num, char *uprefix, char *buf, size_t len)

{

	char *t;

	unsigned int uerr;

	char tmp[EBUFSIZE];

	t = tmp + sizeof(tmp);

	*--t = '\0';

	uerr = (num >= 0) ? num : -num;

	do {

		*--t = "0123456789"[uerr % 10];

	} while (uerr /= 10);

	if (num < 0)

		*--t = '-';

	*--t = ' ';

	*--t = ':';

	strlcpy(buf, uprefix, len);

	strlcat(buf, t, len);

}

EXPORT_C 

int

strerror_r(int errnum, char *strerrbuf, size_t buflen)

{

	int retval = 0;

#if defined(NLS)

	int saved_errno = errno;

	nl_catd catd;

	catd = catopen("libc", NL_CAT_LOCALE);

#endif

	if (errnum < 1 || errnum >= sys_nerr) {

		errstr(errnum,

#if defined(NLS)

			catgets(catd, 1, 0xffff, UPREFIX),

#else

			UPREFIX,

#endif

			strerrbuf, buflen);

		retval = EINVAL;

	} else {

		if (strlcpy(strerrbuf,

#if defined(NLS)

			catgets(catd, 1, errnum, sys_errlist[errnum]),

#else

			sys_errlist[errnum],

#endif

			buflen) >= buflen)

		retval = ERANGE;

	}

#if defined(NLS)

	catclose(catd);

	errno = saved_errno;

#endif

	return (retval);

}

EXPORT_C 

char *

strerror(int num)

{

#ifndef EMULATOR

	static char ebuf[NL_TEXTMAX];

	if (strerror_r(num, ebuf, sizeof(ebuf)) != 0)

#else  

	if (strerror_r(num, ebuf, NL_TEXTMAX) != 0)

#endif 	

	errno = EINVAL;

	return (ebuf);

}

EXPORT_C 

wchar_t *

wcserror(int num)

{	

	char buf[NL_TEXTMAX];

	static wchar_t msgbuf[NL_TEXTMAX];

	strerror_r(num, buf, sizeof(buf));

	mbstowcs(msgbuf, (char*)buf, sizeof(buf)*sizeof(wchar_t)); 

	return msgbuf; 

}