usr/src/usr.bin/window/wwopen.c

/*
 * 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;
}