/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not 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 MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)wwinit.c	3.33 (Berkeley) 05/11/89";
#endif /* not lint */

#include "ww.h"
#include "tt.h"
#include <sys/signal.h>
#include <fcntl.h>
#include "char.h"

wwinit()
{
	register i, j;
	char *kp;
	int s;

	wwdtablesize = getdtablesize();
	wwhead.ww_forw = &wwhead;
	wwhead.ww_back = &wwhead;

	s = sigblock(sigmask(SIGIO));
	if (signal(SIGIO, wwrint) == BADSIG)
		return -1;

	if (wwgettty(0, &wwoldtty) < 0)
		return -1;
	wwwintty = wwoldtty;
	wwwintty.ww_sgttyb.sg_flags &= ~XTABS;
	wwnewtty.ww_sgttyb = wwoldtty.ww_sgttyb;
	wwnewtty.ww_sgttyb.sg_erase = -1;
	wwnewtty.ww_sgttyb.sg_kill = -1;
	wwnewtty.ww_sgttyb.sg_flags |= CBREAK;
	wwnewtty.ww_sgttyb.sg_flags &= ~(ECHO|CRMOD);
	wwnewtty.ww_tchars.t_intrc = -1;
	wwnewtty.ww_tchars.t_quitc = -1;
	wwnewtty.ww_tchars.t_startc = -1;
	wwnewtty.ww_tchars.t_stopc = -1;
	wwnewtty.ww_tchars.t_eofc = -1;
	wwnewtty.ww_tchars.t_brkc = -1;
	wwnewtty.ww_ltchars.t_suspc = -1;
	wwnewtty.ww_ltchars.t_dsuspc = -1;
	wwnewtty.ww_ltchars.t_rprntc = -1;
	wwnewtty.ww_ltchars.t_flushc = -1;
	wwnewtty.ww_ltchars.t_werasc = -1;
	wwnewtty.ww_ltchars.t_lnextc = -1;
	wwnewtty.ww_lmode = wwoldtty.ww_lmode | LLITOUT;
	wwnewtty.ww_ldisc = wwoldtty.ww_ldisc;
	wwnewtty.ww_fflags = wwoldtty.ww_fflags | FASYNC;
	if (wwsettty(0, &wwnewtty, &wwoldtty) < 0)
		goto bad;

	if ((wwterm = getenv("TERM")) == 0) {
		wwerrno = WWE_BADTERM;
		goto bad;
	}
	if (tgetent(wwtermcap, wwterm) != 1) {
		wwerrno = WWE_BADTERM;
		goto bad;
	}
	wwbaud = wwbaudmap[wwoldtty.ww_sgttyb.sg_ospeed];

	if (ttinit() < 0)
		goto bad;
	wwnrow = tt.tt_nrow;
	wwncol = tt.tt_ncol;
	wwavailmodes = tt.tt_availmodes;
	wwwrap = tt.tt_wrap;
	if (xxinit() < 0)
		return -1;
	(*tt.tt_init)();

	if (wwavailmodes & WWM_REV)
		wwcursormodes = WWM_REV | wwavailmodes & WWM_BLK;
	else if (wwavailmodes & WWM_UL)
		wwcursormodes = WWM_UL;

	if ((wwib = malloc((unsigned) 512)) == 0)
		goto bad;
	wwibe = wwib + 512;
	wwibq = wwibp = wwib;

	if ((wwsmap = wwalloc(0, 0, wwnrow, wwncol, sizeof (char))) == 0)
		goto bad;
	for (i = 0; i < wwnrow; i++)
		for (j = 0; j < wwncol; j++)
			wwsmap[i][j] = WWX_NOBODY;

	wwos = (union ww_char **)
		wwalloc(0, 0, wwnrow, wwncol, sizeof (union ww_char));
	if (wwos == 0)
		goto bad;
	for (i = 0; i < wwnrow; i++)
		for (j = 0; j < wwncol; j++)
			wwos[i][j].c_w = ' ';
	wwns = (union ww_char **)
		wwalloc(0, 0, wwnrow, wwncol, sizeof (union ww_char));
	if (wwns == 0)
		goto bad;
	for (i = 0; i < wwnrow; i++)
		for (j = 0; j < wwncol; j++)
			wwns[i][j].c_w = ' ';

	wwtouched = malloc((unsigned) wwnrow);
	if (wwtouched == 0) {
		wwerrno = WWE_NOMEM;
		goto bad;
	}
	for (i = 0; i < wwnrow; i++)
		wwtouched[i] = 0;

	wwupd = (struct ww_update *) malloc((unsigned) wwnrow * sizeof *wwupd);
	if (wwupd == 0) {
		wwerrno = WWE_NOMEM;
		goto bad;
	}

	wwindex[WWX_NOBODY] = &wwnobody;
	wwnobody.ww_order = NWW;

	kp = wwwintermcap;
	if (wwavailmodes & WWM_REV)
		wwaddcap1(WWT_REV, &kp);
	if (wwavailmodes & WWM_BLK)
		wwaddcap1(WWT_BLK, &kp);
	if (wwavailmodes & WWM_UL)
		wwaddcap1(WWT_UL, &kp);
	if (wwavailmodes & WWM_GRP)
		wwaddcap1(WWT_GRP, &kp);
	if (wwavailmodes & WWM_DIM)
		wwaddcap1(WWT_DIM, &kp);
	if (wwavailmodes & WWM_USR)
		wwaddcap1(WWT_USR, &kp);
	if (tt.tt_insline && tt.tt_delline || tt.tt_setscroll)
		wwaddcap1(WWT_ALDL, &kp);
	if (tt.tt_inschar || tt.tt_setinsert)
		wwaddcap1(WWT_IMEI, &kp);
	if (tt.tt_delchar)
		wwaddcap1(WWT_DC, &kp);
	wwaddcap("kb", &kp);
	wwaddcap("ku", &kp);
	wwaddcap("kd", &kp);
	wwaddcap("kl", &kp);
	wwaddcap("kr", &kp);
	wwaddcap("kh", &kp);
	if ((j = tgetnum("kn")) >= 0) {
		char cap[32];

		(void) sprintf(kp, "kn#%d:", j);
		for (; *kp; kp++)
			;
		for (i = 1; i <= j; i++) {
			(void) sprintf(cap, "k%d", i);
			wwaddcap(cap, &kp);
			cap[0] = 'l';
			wwaddcap(cap, &kp);
		}
	}
	/*
	 * It's ok to do this here even if setenv() is destructive
	 * since tt_init() has already made its own copy of it and
	 * wwterm now points to the copy.
	 */
	(void) setenv("TERM", WWT_TERM, 1);

	(void) signal(SIGPIPE, SIG_IGN);
	(void) sigsetmask(s);
	return 0;
bad:
	/*
	 * Don't bother to free storage.  We're supposed
	 * to exit when wwinit fails anyway.
	 */
	(void) wwsettty(0, &wwoldtty, &wwnewtty);
	(void) signal(SIGIO, SIG_DFL);
	(void) sigsetmask(s);
	return -1;
}

wwaddcap(cap, kp)
	register char *cap;
	register char **kp;
{
	char tbuf[512];
	char *tp = tbuf;
	register char *str, *p;

	if ((str = tgetstr(cap, &tp)) != 0) {
		while (*(*kp)++ = *cap++)
			;
		(*kp)[-1] = '=';
		while (*str) {
			for (p = unctrl(*str++); *(*kp)++ = *p++;)
				;
			(*kp)--;
		}
		*(*kp)++ = ':';
		**kp = 0;
	}
}

wwaddcap1(cap, kp)
	register char *cap;
	register char **kp;
{
	while (*(*kp)++ = *cap++)
		;
	(*kp)--;
}