freebsd-skq/lib/libc/locale/none.c

/*-
 * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
 * Copyright (c) 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Paul Borman at Krystal Technologies.
 *
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 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.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)none.c	8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <errno.h>
#include <limits.h>
#include <runetype.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <wchar.h>

extern size_t (*__mbrtowc)(wchar_t * __restrict, const char * __restrict,
    size_t, mbstate_t * __restrict);
extern int (*__mbsinit)(const mbstate_t *);
extern size_t (*__wcrtomb)(char * __restrict, wchar_t, mbstate_t * __restrict);

int	_none_init(_RuneLocale *);
size_t	_none_mbrtowc(wchar_t * __restrict, const char * __restrict, size_t,
	    mbstate_t * __restrict);
int	_none_mbsinit(const mbstate_t *);
size_t	_none_wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict);

int
_none_init(_RuneLocale *rl)
{

	__mbrtowc = _none_mbrtowc;
	__mbsinit = _none_mbsinit;
	__wcrtomb = _none_wcrtomb;
	_CurrentRuneLocale = rl;
	__mb_cur_max = 1;
	return(0);
}

int
_none_mbsinit(const mbstate_t *ps __unused)
{

	/*
	 * Encoding is not state dependent - we are always in the
	 * initial state.
	 */
	return (1);
}

size_t
_none_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
    mbstate_t * __restrict ps __unused)
{

	if (s == NULL)
		/* Reset to initial shift state (no-op) */
		return (0);
	if (n == 0)
		/* Incomplete multibyte sequence */
		return ((size_t)-2);
	if (pwc != NULL)
		*pwc = (unsigned char)*s;
	return (*s == '\0' ? 0 : 1);
}

size_t
_none_wcrtomb(char * __restrict s, wchar_t wc,
    mbstate_t * __restrict ps __unused)
{

	if (s == NULL)
		/* Reset to initial shift state (no-op) */
		return (1);
	if (wc < 0 || wc > UCHAR_MAX) {
		errno = EILSEQ;
		return ((size_t)-1);
	}
	*s = (unsigned char)wc;
	return (1);
}