4.3BSD - /usr/src/ucb/window/wwopen.c

   1: #ifndef lint
   2: static char sccsid[] = "@(#)wwopen.c	3.21 4/24/85";
   3: #endif
   4: 
   5: /*
   6:  * Copyright (c) 1983 Regents of the University of California,
   7:  * All rights reserved.  Redistribution permitted subject to
   8:  * the terms of the Berkeley Software License Agreement.
   9:  */
  10: 
  11: #include "ww.h"
  12: #include <sys/types.h>
  13: #include <sys/socket.h>
  14: 
  15: struct ww *
  16: wwopen(flags, nrow, ncol, row, col, nline)
  17: {
  18:     register struct ww *w;
  19:     register i, j;
  20:     char m;
  21:     short nvis;
  22: 
  23:     w = (struct ww *)calloc(sizeof (struct ww), 1);
  24:     if (w == 0) {
  25:         wwerrno = WWE_NOMEM;
  26:         goto bad;
  27:     }
  28:     w->ww_pty = -1;
  29:     w->ww_socket = -1;
  30: 
  31:     for (i = 0; i < NWW && wwindex[i] != 0; i++)
  32:         ;
  33:     if (i >= NWW) {
  34:         wwerrno = WWE_TOOMANY;
  35:         goto bad;
  36:     }
  37:     w->ww_index = i;
  38: 
  39:     if (nline < nrow)
  40:         nline = nrow;
  41: 
  42:     w->ww_w.t = row;
  43:     w->ww_w.b = row + nrow;
  44:     w->ww_w.l = col;
  45:     w->ww_w.r = col + ncol;
  46:     w->ww_w.nr = nrow;
  47:     w->ww_w.nc = ncol;
  48: 
  49:     w->ww_b.t = row;
  50:     w->ww_b.b = row + nline;
  51:     w->ww_b.l = col;
  52:     w->ww_b.r = col + ncol;
  53:     w->ww_b.nr = nline;
  54:     w->ww_b.nc = ncol;
  55: 
  56:     w->ww_i.t = MAX(w->ww_w.t, 0);
  57:     w->ww_i.b = MIN(w->ww_w.b, wwnrow);
  58:     w->ww_i.l = MAX(w->ww_w.l, 0);
  59:     w->ww_i.r = MIN(w->ww_w.r, wwncol);
  60:     w->ww_i.nr = w->ww_i.b - w->ww_i.t;
  61:     w->ww_i.nc = w->ww_i.r - w->ww_i.l;
  62: 
  63:     w->ww_cur.r = w->ww_w.t;
  64:     w->ww_cur.c = w->ww_w.l;
  65: 
  66:     if (flags & WWO_PTY) {
  67:         struct winsize winsize;
  68: 
  69:         if (wwgetpty(w) < 0)
  70:             goto bad;
  71:         if (wwsettty(w->ww_pty, &wwwintty, (struct ww_tty *)0) < 0)
  72:             goto bad;
  73:         winsize.ws_row = nrow;
  74:         winsize.ws_col = ncol;
  75:         winsize.ws_xpixel = winsize.ws_ypixel = 0;
  76:         if (ioctl(w->ww_pty, (int)TIOCSWINSZ, (char *)&winsize) < 0) {
  77:             wwerrno = WWE_SYS;
  78:             goto bad;
  79:         }
  80:         w->ww_ispty = 1;
  81:     } else if (flags & WWO_SOCKET) {
  82:         int d[2];
  83:         if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, d) < 0) {
  84:             wwerrno = WWE_SYS;
  85:             goto bad;
  86:         }
  87:         w->ww_pty = d[0];
  88:         w->ww_socket = d[1];
  89:     }
  90:     if (flags & (WWO_PTY|WWO_SOCKET)) {
  91:         if ((w->ww_ob = malloc(512)) == 0) {
  92:             wwerrno = WWE_NOMEM;
  93:             goto bad;
  94:         }
  95:         w->ww_obe = w->ww_ob + 512;
  96:         w->ww_obp = w->ww_obq = w->ww_ob;
  97:     }
  98: 
  99:     w->ww_win = wwalloc(w->ww_w.t, w->ww_w.l,
 100:         w->ww_w.nr, w->ww_w.nc, sizeof (char));
 101:     if (w->ww_win == 0)
 102:         goto bad;
 103:     m = 0;
 104:     if (flags & WWO_GLASS)
 105:         m |= WWM_GLS;
 106:     if (flags & WWO_REVERSE)
 107:         m |= WWM_REV;
 108:     for (i = w->ww_w.t; i < w->ww_w.b; i++)
 109:         for (j = w->ww_w.l; j < w->ww_w.r; j++)
 110:             w->ww_win[i][j] = m;
 111: 
 112:     if (flags & WWO_FRAME) {
 113:         w->ww_fmap = wwalloc(w->ww_w.t, w->ww_w.l,
 114:             w->ww_w.nr, w->ww_w.nc, sizeof (char));
 115:         if (w->ww_fmap == 0)
 116:             goto bad;
 117:         for (i = w->ww_w.t; i < w->ww_w.b; i++)
 118:             for (j = w->ww_w.l; j < w->ww_w.r; j++)
 119:                 w->ww_fmap[i][j] = 0;
 120:     }
 121: 
 122:     w->ww_buf = (union ww_char **)
 123:         wwalloc(w->ww_b.t, w->ww_b.l,
 124:             w->ww_b.nr, w->ww_b.nc, sizeof (union ww_char));
 125:     if (w->ww_buf == 0)
 126:         goto bad;
 127:     for (i = w->ww_b.t; i < w->ww_b.b; i++)
 128:         for (j = w->ww_b.l; j < w->ww_b.r; j++)
 129:             w->ww_buf[i][j].c_w = ' ';
 130: 
 131:     w->ww_nvis = (short *)malloc((unsigned) w->ww_w.nr * sizeof (short));
 132:     if (w->ww_nvis == 0) {
 133:         wwerrno = WWE_NOMEM;
 134:         goto bad;
 135:     }
 136:     w->ww_nvis -= w->ww_w.t;
 137:     nvis = m ? 0 : w->ww_w.nc;
 138:     for (i = w->ww_w.t; i < w->ww_w.b; i++)
 139:         w->ww_nvis[i] = nvis;
 140: 
 141:     w->ww_state = WWS_INITIAL;
 142:     w->ww_oflags = flags;
 143:     return wwindex[w->ww_index] = w;
 144: bad:
 145:     if (w != 0) {
 146:         if (w->ww_win != 0)
 147:             wwfree(w->ww_win, w->ww_w.t);
 148:         if (w->ww_fmap != 0)
 149:             wwfree(w->ww_fmap, w->ww_w.t);
 150:         if (w->ww_buf != 0)
 151:             wwfree((char **)w->ww_buf, w->ww_b.t);
 152:         if (w->ww_nvis != 0)
 153:             free((char *)(w->ww_nvis + w->ww_w.t));
 154:         if (w->ww_ob != 0)
 155:             free(w->ww_ob);
 156:         if (w->ww_pty >= 0)
 157:             (void) close(w->ww_pty);
 158:         if (w->ww_socket >= 0)
 159:             (void) close(w->ww_socket);
 160:         free((char *)w);
 161:     }
 162:     return 0;
 163: }

Defined functions

Defined variables