BSD 4_3_Reno release

[unix-history] / usr / src / usr.bin / window / ttinit.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 are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions including binaries display the following
* acknowledgement:  ``This product includes software developed by the
* University of California, Berkeley and its contributors'' in the
* documentation or other materials provided with the distribution and in
* all advertising materials mentioning features or use of this software.
* 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/

#ifndef lint
static char sccsid[] = "@(#)ttinit.c    3.26 (Berkeley) 6/6/90";
#endif /* not lint */

#include "ww.h"
#include "tt.h"
#ifdef POSIX_TTY
#include <sys/ioctl.h>
#endif

int tt_h19();
int tt_h29();
int tt_f100();
int tt_tvi925();
int tt_wyse75();
int tt_wyse60();
int tt_zapple();
int tt_zentec();
int tt_generic();
struct tt_tab tt_tab[] = {
       { "h19",        3, tt_h19 },
       { "h29",        3, tt_h29 },
       { "f100",       4, tt_f100 },
       { "tvi925",     6, tt_tvi925 },
       { "wyse75",     6, tt_wyse75 },
       { "wyse60",     6, tt_wyse60 },
       { "w60",        3, tt_wyse60 },
       { "zapple",     6, tt_zapple },
       { "zentec",     6, tt_zentec },
       { "generic",    0, tt_generic },
       0
};

ttinit()
{
       int i;
       register struct tt_tab *tp;
       register char *p, *q;
       register char *t;
       struct winsize winsize;
       int ttflush();

       tt_strp = tt_strings;

       /*
        * Set output buffer size to about 1 second of output time.
        */
       i = MIN(wwbaud/10, 512);
       if ((tt_ob = malloc((unsigned) i)) == 0) {
               wwerrno = WWE_NOMEM;
               return -1;
       }
       tt_obp = tt_ob;
       tt_obe = tt_ob + i;

       /*
        * Use the standard name of the terminal (i.e. the second
        * name in termcap).
        */
       for (p = wwtermcap; *p && *p != '|' && *p != ':'; p++)
               ;
       if (*p == '|')
               p++;
       for (q = p; *q && *q != '|' && *q != ':'; q++)
               ;
       if (q != p && (t = malloc((unsigned) (q - p + 1))) != 0) {
               wwterm = t;
               while (p < q)
                       *t++ = *p++;
               *t = 0;
       }
       for (tp = tt_tab; tp->tt_name != 0; tp++)
               if (strncmp(tp->tt_name, wwterm, tp->tt_len) == 0)
                       break;
       if (tp->tt_name == 0) {
               wwerrno = WWE_BADTERM;
               return -1;
       }
       if ((*tp->tt_func)() < 0) {
               wwerrno = WWE_CANTDO;
               return -1;
       }
       if (ioctl(0, TIOCGWINSZ, (char *)&winsize) >= 0) {
               if (winsize.ws_row != 0)
                       tt.tt_nrow = winsize.ws_row;
               if (winsize.ws_col != 0)
                       tt.tt_ncol = winsize.ws_col;
       }
       tt.tt_scroll_top = 0;
       tt.tt_scroll_bot = tt.tt_nrow - 1;
       tt.tt_flush = ttflush;
       return 0;
}