138 lines
3.2 KiB
C
138 lines
3.2 KiB
C
/* $NetBSD: multibyte.c,v 1.6 1997/07/13 20:16:48 christos Exp $ */
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/*
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* Copyright (c) 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char *sccsid = "from: @(#)multibyte.c 5.1 (Berkeley) 2/18/91";
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#else
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__RCSID("$NetBSD: multibyte.c,v 1.6 1997/07/13 20:16:48 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include <stdlib.h>
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/*
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* Stub multibyte character functions.
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* This cheezy implementation is fixed to the native single-byte
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* character set.
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*/
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int
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mblen(s, n)
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const char *s;
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size_t n;
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{
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if (s == NULL || *s == '\0')
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return 0;
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if (n == 0)
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return -1;
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return 1;
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}
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/*ARGSUSED*/
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int
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mbtowc(pwc, s, n)
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wchar_t *pwc;
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const char *s;
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size_t n;
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{
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if (s == NULL)
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return 0;
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if (n == 0)
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return -1;
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if (pwc)
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*pwc = (wchar_t) *s;
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return (*s != '\0');
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}
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/*ARGSUSED*/
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int
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#ifdef __STDC__
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wctomb(char *s, wchar_t wchar)
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#else
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wctomb(s, wchar)
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char *s;
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wchar_t wchar;
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#endif
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{
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if (s == NULL)
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return 0;
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*s = (char) wchar;
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return 1;
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}
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/*ARGSUSED*/
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size_t
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mbstowcs(pwcs, s, n)
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wchar_t *pwcs;
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const char *s;
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size_t n;
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{
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int count = 0;
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if (n != 0) {
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do {
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if ((*pwcs++ = (wchar_t) *s++) == 0)
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break;
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count++;
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} while (--n != 0);
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}
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return count;
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}
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/*ARGSUSED*/
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size_t
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wcstombs(s, pwcs, n)
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char *s;
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const wchar_t *pwcs;
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size_t n;
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{
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int count = 0;
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if (n != 0) {
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do {
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if ((*s++ = (char) *pwcs++) == 0)
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break;
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count++;
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} while (--n != 0);
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}
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return count;
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}
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