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152 lines
3.6 KiB
C
152 lines
3.6 KiB
C
/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Paul Borman at Krystal Technologies.
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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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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)ansi.c 8.1 (Berkeley) 6/27/93";
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#endif /* LIBC_SCCS and not lint */
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#include <stdlib.h>
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#include <limits.h>
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#include <stddef.h>
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#include <rune.h>
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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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char const *e;
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if (s == 0 || *s == 0)
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return (0); /* No support for state dependent encodings. */
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if (sgetrune(s, n, &e) == _INVALID_RUNE)
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return (s - e);
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return (e - s);
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}
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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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char const *e;
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rune_t r;
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if (s == 0 || *s == 0)
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return (0); /* No support for state dependent encodings. */
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if ((r = sgetrune(s, n, &e)) == _INVALID_RUNE)
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return (s - e);
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if (pwc)
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*pwc = r;
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return (e - s);
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}
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int
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wctomb(s, wchar)
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char *s;
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wchar_t wchar;
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{
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char *e;
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if (s == 0)
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return (0); /* No support for state dependent encodings. */
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if (wchar == 0) {
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*s = 0;
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return (1);
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}
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sputrune(wchar, s, MB_CUR_MAX, &e);
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return (e ? e - s : -1);
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}
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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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char const *e;
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int cnt = 0;
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if (!pwcs || !s)
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return (-1);
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while (n-- > 0) {
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*pwcs = sgetrune(s, MB_LEN_MAX, &e);
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if (*pwcs == _INVALID_RUNE)
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return (-1);
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if (*pwcs++ == 0)
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break;
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s = e;
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++cnt;
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}
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return (cnt);
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}
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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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char *e;
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int cnt, nb;
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if (!pwcs || !s || n > INT_MAX)
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return (-1);
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nb = n;
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cnt = 0;
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while (nb > 0) {
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if (*pwcs == 0) {
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*s = 0;
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break;
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}
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if (!sputrune(*pwcs++, s, nb, &e))
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return (-1); /* encoding error */
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if (!e) /* too long */
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return (cnt);
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cnt += e - s;
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nb -= e - s;
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s = e;
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}
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return (cnt);
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}
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