/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#include <widec.h>
#include <ctype.h>
#include <sys/types.h>
#include "curses_wchar.h"
int
_curs_mbtowc(wchar_t *wchar, const char *s, size_t n)
{
int length, c;
wchar_t intcode;
char *olds = (char *)s;
wchar_t mask;
if (s == (char *)0)
return (0);
if (n == 0)
return (-1);
c = (unsigned char)*s++;
if (c < 0200) {
if (wchar)
*wchar = c;
return (c ? 1 : 0);
}
intcode = 0;
if (c == SS2) {
if ((length = eucw2) == 0)
goto lab1;
mask = P01;
goto lab2;
} else if (c == SS3) {
if ((length = eucw3) == 0)
goto lab1;
mask = P10;
goto lab2;
}
lab1:
if (iscntrl(c)) {
if (wchar)
*wchar = c;
return (1);
}
length = eucw1 - 1;
mask = P11;
intcode = c & 0177;
lab2:
if (length + 1 > n || length < 0)
return (-1);
while (length--) {
if ((c = (unsigned char)*s++) < 0200 || iscntrl(c))
return (-1);
intcode = (intcode << 7) | (c & 0x7F);
}
if (wchar)
*wchar = intcode | mask;
/*LINTED*/
return ((int)(s - olds));
}