usr.bin/window/wwopen.c

   1 /*      @(#)wwopen.c    8.2 (Berkeley) 4/28/95  */
   2 /*      $NetBSD: wwopen.c,v 1.12 2003/08/07 11:17:42 agc Exp $  */
   3
   4 /*
   5  * Copyright (c) 1983, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Edward Wang at The University of California, Berkeley.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/types.h>
  37 #include <sys/socket.h>
  38 #include <fcntl.h>
  39 #include <stdlib.h>
  40 #include <unistd.h>
  41 #include "ww.h"
  42
  43 struct ww *
  44 wwopen(int type, int oflags, int nrow, int ncol, int row, int col, int nline)
  45 {
  46         struct ww *w;
  47         int i, j;
  48         char m;
  49         short nvis;
  50
  51         w = (struct ww *)calloc(1, sizeof (struct ww));
  52         if (w == NULL) {
  53                 wwerrno = WWE_NOMEM;
  54                 goto bad;
  55         }
  56         w->ww_pty = -1;
  57         w->ww_socket = -1;
  58
  59         for (i = 0; i < NWW && wwindex[i] != 0; i++)
  60                 ;
  61         if (i >= NWW) {
  62                 wwerrno = WWE_TOOMANY;
  63                 goto bad;
  64         }
  65         w->ww_index = i;
  66
  67         if (nline < nrow)
  68                 nline = nrow;
  69
  70         w->ww_w.t = row;
  71         w->ww_w.b = row + nrow;
  72         w->ww_w.l = col;
  73         w->ww_w.r = col + ncol;
  74         w->ww_w.nr = nrow;
  75         w->ww_w.nc = ncol;
  76
  77         w->ww_b.t = row;
  78         w->ww_b.b = row + nline;
  79         w->ww_b.l = col;
  80         w->ww_b.r = col + ncol;
  81         w->ww_b.nr = nline;
  82         w->ww_b.nc = ncol;
  83
  84         w->ww_i.t = MAX(w->ww_w.t, 0);
  85         w->ww_i.b = MIN(w->ww_w.b, wwnrow);
  86         w->ww_i.l = MAX(w->ww_w.l, 0);
  87         w->ww_i.r = MIN(w->ww_w.r, wwncol);
  88         w->ww_i.nr = w->ww_i.b - w->ww_i.t;
  89         w->ww_i.nc = w->ww_i.r - w->ww_i.l;
  90
  91         w->ww_cur.r = w->ww_w.t;
  92         w->ww_cur.c = w->ww_w.l;
  93
  94         w->ww_type = type;
  95         switch (type) {
  96         case WWT_PTY:
  97                 if (wwgetpty(w) < 0)
  98                         goto bad;
  99                 break;
 100         case WWT_SOCKET:
 101             {
 102                 int d[2];
 103                 if (socketpair(AF_LOCAL, SOCK_STREAM, PF_UNSPEC, d) < 0) {
 104                         wwerrno = WWE_SYS;
 105                         goto bad;
 106                 }
 107                 (void) fcntl(d[0], F_SETFD, 1);
 108                 (void) fcntl(d[1], F_SETFD, 1);
 109                 w->ww_pty = d[0];
 110                 w->ww_socket = d[1];
 111                 break;
 112             }
 113         }
 114         if (type != WWT_INTERNAL) {
 115                 if ((w->ww_ob = malloc(512)) == 0) {
 116                         wwerrno = WWE_NOMEM;
 117                         goto bad;
 118                 }
 119                 w->ww_obe = w->ww_ob + 512;
 120                 w->ww_obp = w->ww_obq = w->ww_ob;
 121                 if (w->ww_pty >= wwdtablesize)
 122                         wwdtablesize = w->ww_pty + 1;
 123         }
 124
 125         w->ww_win = wwalloc(w->ww_w.t, w->ww_w.l,
 126                 w->ww_w.nr, w->ww_w.nc, sizeof (char));
 127         if (w->ww_win == 0)
 128                 goto bad;
 129         m = 0;
 130         if (oflags & WWO_GLASS)
 131                 m |= WWM_GLS;
 132         if (oflags & WWO_REVERSE) {
 133                 if (wwavailmodes & WWM_REV)
 134                         m |= WWM_REV;
 135                 else    oflags &= ~WWO_REVERSE;
 136         }
 137         for (i = w->ww_w.t; i < w->ww_w.b; i++)
 138                 for (j = w->ww_w.l; j < w->ww_w.r; j++)
 139                         w->ww_win[i][j] = m;
 140
 141         if (oflags & WWO_FRAME) {
 142                 w->ww_fmap = wwalloc(w->ww_w.t, w->ww_w.l,
 143                         w->ww_w.nr, w->ww_w.nc, sizeof (char));
 144                 if (w->ww_fmap == 0)
 145                         goto bad;
 146                 for (i = w->ww_w.t; i < w->ww_w.b; i++)
 147                         for (j = w->ww_w.l; j < w->ww_w.r; j++)
 148                                 w->ww_fmap[i][j] = 0;
 149         }
 150
 151         w->ww_buf = (union ww_char **)
 152                 wwalloc(w->ww_b.t, w->ww_b.l,
 153                         w->ww_b.nr, w->ww_b.nc, sizeof (union ww_char));
 154         if (w->ww_buf == 0)
 155                 goto bad;
 156         for (i = w->ww_b.t; i < w->ww_b.b; i++)
 157                 for (j = w->ww_b.l; j < w->ww_b.r; j++)
 158                         w->ww_buf[i][j].c_w = ' ';
 159
 160         w->ww_nvis = (short *)malloc((unsigned) w->ww_w.nr * sizeof (short));
 161         if (w->ww_nvis == 0) {
 162                 wwerrno = WWE_NOMEM;
 163                 goto bad;
 164         }
 165         w->ww_nvis -= w->ww_w.t;
 166         nvis = m ? 0 : w->ww_w.nc;
 167         for (i = w->ww_w.t; i < w->ww_w.b; i++)
 168                 w->ww_nvis[i] = nvis;
 169
 170         w->ww_state = WWS_INITIAL;
 171         CLR(w->ww_oflags, WWO_ALLFLAGS);
 172         SET(w->ww_oflags, oflags);
 173         return wwindex[w->ww_index] = w;
 174 bad:
 175         if (w != NULL) {
 176                 if (w->ww_win != 0)
 177                         wwfree(w->ww_win, w->ww_w.t);
 178                 if (w->ww_fmap != 0)
 179                         wwfree(w->ww_fmap, w->ww_w.t);
 180                 if (w->ww_buf != 0)
 181                         wwfree((char **)w->ww_buf, w->ww_b.t);
 182                 if (w->ww_nvis != 0)
 183                         free((char *)(w->ww_nvis + w->ww_w.t));
 184                 if (w->ww_ob != 0)
 185                         free(w->ww_ob);
 186                 if (w->ww_pty >= 0)
 187                         (void) close(w->ww_pty);
 188                 if (w->ww_socket >= 0)
 189                         (void) close(w->ww_socket);
 190                 free((char *)w);
 191         }
 192         return 0;
 193 }