InfoMagic Source Code 1993 July/THE_SOURCE_CODE_CD_ROM.iso/bsd_srcs/usr.bin/window/wwopen.c

C/C++ Source or Header | 1991-04-18 | 5.1 KB | 186 lines

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Edward Wang at The University of California, Berkeley.
 *
 * 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.
 */

#ifndef lint
static char sccsid[] = "@(#)wwopen.c    3.29 (Berkeley) 6/6/90";
#endif /* not lint */

#include "ww.h"
#include <sys/types.h>
#include <sys/socket.h>

struct ww *
wwopen(flags, nrow, ncol, row, col, nline)
{
    register struct ww *w;
    register i, j;
    char m;
    short nvis;

    w = (struct ww *)calloc(sizeof (struct ww), 1);
    if (w == 0) {
        wwerrno = WWE_NOMEM;
        goto bad;
    }
    w->ww_pty = -1;
    w->ww_socket = -1;

    for (i = 0; i < NWW && wwindex[i] != 0; i++)
        ;
    if (i >= NWW) {
        wwerrno = WWE_TOOMANY;
        goto bad;
    }
    w->ww_index = i;

    if (nline < nrow)
        nline = nrow;

    w->ww_w.t = row;
    w->ww_w.b = row + nrow;
    w->ww_w.l = col;
    w->ww_w.r = col + ncol;
    w->ww_w.nr = nrow;
    w->ww_w.nc = ncol;

    w->ww_b.t = row;
    w->ww_b.b = row + nline;
    w->ww_b.l = col;
    w->ww_b.r = col + ncol;
    w->ww_b.nr = nline;
    w->ww_b.nc = ncol;

    w->ww_i.t = MAX(w->ww_w.t, 0);
    w->ww_i.b = MIN(w->ww_w.b, wwnrow);
    w->ww_i.l = MAX(w->ww_w.l, 0);
    w->ww_i.r = MIN(w->ww_w.r, wwncol);
    w->ww_i.nr = w->ww_i.b - w->ww_i.t;
    w->ww_i.nc = w->ww_i.r - w->ww_i.l;

    w->ww_cur.r = w->ww_w.t;
    w->ww_cur.c = w->ww_w.l;

    if (flags & WWO_PTY) {
        if (wwgetpty(w) < 0)
            goto bad;
        w->ww_ispty = 1;
    } else if (flags & WWO_SOCKET) {
        int d[2];
        if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, d) < 0) {
            wwerrno = WWE_SYS;
            goto bad;
        }
        w->ww_pty = d[0];
        w->ww_socket = d[1];
    }
    if (flags & (WWO_PTY|WWO_SOCKET)) {
        if ((w->ww_ob = malloc(512)) == 0) {
            wwerrno = WWE_NOMEM;
            goto bad;
        }
        w->ww_obe = w->ww_ob + 512;
        w->ww_obp = w->ww_obq = w->ww_ob;
    }

    w->ww_win = wwalloc(w->ww_w.t, w->ww_w.l,
        w->ww_w.nr, w->ww_w.nc, sizeof (char));
    if (w->ww_win == 0)
        goto bad;
    m = 0;
    if (flags & WWO_GLASS)
        m |= WWM_GLS;
    if (flags & WWO_REVERSE)
        if (wwavailmodes & WWM_REV)
            m |= WWM_REV;
        else
            flags &= ~WWO_REVERSE;
    for (i = w->ww_w.t; i < w->ww_w.b; i++)
        for (j = w->ww_w.l; j < w->ww_w.r; j++)
            w->ww_win[i][j] = m;

    if (flags & WWO_FRAME) {
        w->ww_fmap = wwalloc(w->ww_w.t, w->ww_w.l,
            w->ww_w.nr, w->ww_w.nc, sizeof (char));
        if (w->ww_fmap == 0)
            goto bad;
        for (i = w->ww_w.t; i < w->ww_w.b; i++)
            for (j = w->ww_w.l; j < w->ww_w.r; j++)
                w->ww_fmap[i][j] = 0;
    }

    w->ww_buf = (union ww_char **)
        wwalloc(w->ww_b.t, w->ww_b.l,
            w->ww_b.nr, w->ww_b.nc, sizeof (union ww_char));
    if (w->ww_buf == 0)
        goto bad;
    for (i = w->ww_b.t; i < w->ww_b.b; i++)
        for (j = w->ww_b.l; j < w->ww_b.r; j++)
            w->ww_buf[i][j].c_w = ' ';

    w->ww_nvis = (short *)malloc((unsigned) w->ww_w.nr * sizeof (short));
    if (w->ww_nvis == 0) {
        wwerrno = WWE_NOMEM;
        goto bad;
    }
    w->ww_nvis -= w->ww_w.t;
    nvis = m ? 0 : w->ww_w.nc;
    for (i = w->ww_w.t; i < w->ww_w.b; i++)
        w->ww_nvis[i] = nvis;

    w->ww_state = WWS_INITIAL;
    w->ww_oflags = flags;
    return wwindex[w->ww_index] = w;
bad:
    if (w != 0) {
        if (w->ww_win != 0)
            wwfree(w->ww_win, w->ww_w.t);
        if (w->ww_fmap != 0)
            wwfree(w->ww_fmap, w->ww_w.t);
        if (w->ww_buf != 0)
            wwfree((char **)w->ww_buf, w->ww_b.t);
        if (w->ww_nvis != 0)
            free((char *)(w->ww_nvis + w->ww_w.t));
        if (w->ww_ob != 0)
            free(w->ww_ob);
        if (w->ww_pty >= 0)
            (void) close(w->ww_pty);
        if (w->ww_socket >= 0)
            (void) close(w->ww_socket);
        free((char *)w);
    }
    return 0;
}