usr.bin/window/wwopen.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Edward Wang at The University of California, Berkeley.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#)wwopen.c 8.1 (Berkeley) 6/6/93
  37  * $FreeBSD: src/usr.bin/window/wwopen.c,v 1.2.12.1 2001/05/17 09:45:01 obrien Exp $
  38  * $DragonFly: src/usr.bin/window/wwopen.c,v 1.2 2003/06/17 04:29:34 dillon Exp $
  39  */
  40
  41 #include "ww.h"
  42 #include <sys/types.h>
  43 #include <sys/socket.h>
  44 #include <fcntl.h>
  45 #include <stdlib.h>
  46
  47 struct ww *
  48 wwopen(flags, nrow, ncol, row, col, nline)
  49 {
  50         register struct ww *w;
  51         register i, j;
  52         char m;
  53         short nvis;
  54
  55         w = (struct ww *)calloc(sizeof (struct ww), 1);
  56         if (w == 0) {
  57                 wwerrno = WWE_NOMEM;
  58                 goto bad;
  59         }
  60         w->ww_pty = -1;
  61         w->ww_socket = -1;
  62
  63         for (i = 0; i < NWW && wwindex[i] != 0; i++)
  64                 ;
  65         if (i >= NWW) {
  66                 wwerrno = WWE_TOOMANY;
  67                 goto bad;
  68         }
  69         w->ww_index = i;
  70
  71         if (nline < nrow)
  72                 nline = nrow;
  73
  74         w->ww_w.t = row;
  75         w->ww_w.b = row + nrow;
  76         w->ww_w.l = col;
  77         w->ww_w.r = col + ncol;
  78         w->ww_w.nr = nrow;
  79         w->ww_w.nc = ncol;
  80
  81         w->ww_b.t = row;
  82         w->ww_b.b = row + nline;
  83         w->ww_b.l = col;
  84         w->ww_b.r = col + ncol;
  85         w->ww_b.nr = nline;
  86         w->ww_b.nc = ncol;
  87
  88         w->ww_i.t = MAX(w->ww_w.t, 0);
  89         w->ww_i.b = MIN(w->ww_w.b, wwnrow);
  90         w->ww_i.l = MAX(w->ww_w.l, 0);
  91         w->ww_i.r = MIN(w->ww_w.r, wwncol);
  92         w->ww_i.nr = w->ww_i.b - w->ww_i.t;
  93         w->ww_i.nc = w->ww_i.r - w->ww_i.l;
  94
  95         w->ww_cur.r = w->ww_w.t;
  96         w->ww_cur.c = w->ww_w.l;
  97
  98         if (flags & WWO_PTY) {
  99                 if (wwgetpty(w) < 0)
 100                         goto bad;
 101                 w->ww_ispty = 1;
 102         } else if (flags & WWO_SOCKET) {
 103                 int d[2];
 104                 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, d) < 0) {
 105                         wwerrno = WWE_SYS;
 106                         goto bad;
 107                 }
 108                 (void) fcntl(d[0], F_SETFD, 1);
 109                 (void) fcntl(d[1], F_SETFD, 1);
 110                 w->ww_pty = d[0];
 111                 w->ww_socket = d[1];
 112         }
 113         if (flags & (WWO_PTY|WWO_SOCKET)) {
 114                 if ((w->ww_ob = malloc(512)) == 0) {
 115                         wwerrno = WWE_NOMEM;
 116                         goto bad;
 117                 }
 118                 w->ww_obe = w->ww_ob + 512;
 119                 w->ww_obp = w->ww_obq = w->ww_ob;
 120         }
 121
 122         w->ww_win = wwalloc(w->ww_w.t, w->ww_w.l,
 123                 w->ww_w.nr, w->ww_w.nc, sizeof (char));
 124         if (w->ww_win == 0)
 125                 goto bad;
 126         m = 0;
 127         if (flags & WWO_GLASS)
 128                 m |= WWM_GLS;
 129         if (flags & WWO_REVERSE)
 130                 if (wwavailmodes & WWM_REV)
 131                         m |= WWM_REV;
 132                 else
 133                         flags &= ~WWO_REVERSE;
 134         for (i = w->ww_w.t; i < w->ww_w.b; i++)
 135                 for (j = w->ww_w.l; j < w->ww_w.r; j++)
 136                         w->ww_win[i][j] = m;
 137
 138         if (flags & WWO_FRAME) {
 139                 w->ww_fmap = wwalloc(w->ww_w.t, w->ww_w.l,
 140                         w->ww_w.nr, w->ww_w.nc, sizeof (char));
 141                 if (w->ww_fmap == 0)
 142                         goto bad;
 143                 for (i = w->ww_w.t; i < w->ww_w.b; i++)
 144                         for (j = w->ww_w.l; j < w->ww_w.r; j++)
 145                                 w->ww_fmap[i][j] = 0;
 146         }
 147
 148         w->ww_buf = (union ww_char **)
 149                 wwalloc(w->ww_b.t, w->ww_b.l,
 150                         w->ww_b.nr, w->ww_b.nc, sizeof (union ww_char));
 151         if (w->ww_buf == 0)
 152                 goto bad;
 153         for (i = w->ww_b.t; i < w->ww_b.b; i++)
 154                 for (j = w->ww_b.l; j < w->ww_b.r; j++)
 155                         w->ww_buf[i][j].c_w = ' ';
 156
 157         w->ww_nvis = (short *)malloc((unsigned) w->ww_w.nr * sizeof (short));
 158         if (w->ww_nvis == 0) {
 159                 wwerrno = WWE_NOMEM;
 160                 goto bad;
 161         }
 162         w->ww_nvis -= w->ww_w.t;
 163         nvis = m ? 0 : w->ww_w.nc;
 164         for (i = w->ww_w.t; i < w->ww_w.b; i++)
 165                 w->ww_nvis[i] = nvis;
 166
 167         w->ww_state = WWS_INITIAL;
 168         w->ww_oflags = flags;
 169         return wwindex[w->ww_index] = w;
 170 bad:
 171         if (w != 0) {
 172                 if (w->ww_win != 0)
 173                         wwfree(w->ww_win, w->ww_w.t);
 174                 if (w->ww_fmap != 0)
 175                         wwfree(w->ww_fmap, w->ww_w.t);
 176                 if (w->ww_buf != 0)
 177                         wwfree((char **)w->ww_buf, w->ww_b.t);
 178                 if (w->ww_nvis != 0)
 179                         free((char *)(w->ww_nvis + w->ww_w.t));
 180                 if (w->ww_ob != 0)
 181                         free(w->ww_ob);
 182                 if (w->ww_pty >= 0)
 183                         (void) close(w->ww_pty);
 184                 if (w->ww_socket >= 0)
 185                         (void) close(w->ww_socket);
 186                 free((char *)w);
 187         }
 188         return 0;
 189 }