libcurses/screen/mbgetwidth.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 (c) 1988 AT&T */
/*    All Rights Reserved   */


/*
 *      Copyright (c) 1997, by Sun Microsystems, Inc.
 *      All rights reserved.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*LINTLIBRARY*/

#include    "curses_inc.h"
#include    <sys/types.h>
#include    <ctype.h>

#define CSWIDTH 514

short       cswidth[4] = {-1, 1, 1, 1}; /* character length */
short       _curs_scrwidth[4] = {1, 1, 1, 1};   /* screen width */

/*
 * This function is called only once in a program.
 * Before cgetwidth() is called, setlocale() must be called.
 */

void
mbgetwidth(void)
{
    unsigned char *cp = &__ctype[CSWIDTH];

    cswidth[0] = cp[0];
    cswidth[1] = cp[1];
    cswidth[2] = cp[2];
    _curs_scrwidth[0] = cp[3];
    _curs_scrwidth[1] = cp[4];
    _curs_scrwidth[2] = cp[5];

}

int
mbeucw(int c)
{
    c &= 0xFF;

    if (c & 0x80) {
        if (c == SS2) {
            return (cswidth[1]);
        } else if (c == SS3) {
            return (cswidth[2]);
        }
        return (cswidth[0]);
    }
    return (1);
}

int
mbscrw(int c)
{
    c &= 0xFF;

    if (c & 0x80) {
        if (c == SS2) {
            return (_curs_scrwidth[1]);
        } else if (c == SS3) {
            return (_curs_scrwidth[2]);
        }
        return (_curs_scrwidth[0]);
    }
    return (1);
}

int
wcscrw(wchar_t wc)
{
    int rv;

    switch (wc & EUCMASK) {
    case    P11:    /* Code set 1 */
        rv = _curs_scrwidth[0];
        break;
    case    P01:    /* Code set 2 */
        rv = _curs_scrwidth[1];
        break;
    case    P10:    /* Code set 3 */
        rv = _curs_scrwidth[2];
        break;
    default :   /* Code set 0 */
        rv = 1;
        break;
    }

    return (rv);
}