#ifndef lint
static char sccsid[] = "@(#)wwopen.c	3.21 4/24/85";
#endif

/*
 * Copyright (c) 1983 Regents of the University of California,
 * All rights reserved.  Redistribution permitted subject to
 * the terms of the Berkeley Software License Agreement.
 */

#include "ww.h"
#include <sys/types.h>
#include <sys/socket.h>

struct ww *
wwopen(flags, nrow, ncol, row, col, nline)
{
	register struct ww *w;
	register i, j;
	char m;
	short nvis;

	w = (struct ww *)calloc(sizeof (struct ww), 1);
	if (w == 0) {
		wwerrno = WWE_NOMEM;
		goto bad;
	}
	w->ww_pty = -1;
	w->ww_socket = -1;

	for (i = 0; i < NWW && wwindex[i] != 0; i++)
		;
	if (i >= NWW) {
		wwerrno = WWE_TOOMANY;
		goto bad;
	}
	w->ww_index = i;

	if (nline < nrow)
		nline = nrow;

	w->ww_w.t = row;
	w->ww_w.b = row + nrow;
	w->ww_w.l = col;
	w->ww_w.r = col + ncol;
	w->ww_w.nr = nrow;
	w->ww_w.nc = ncol;

	w->ww_b.t = row;
	w->ww_b.b = row + nline;
	w->ww_b.l = col;
	w->ww_b.r = col + ncol;
	w->ww_b.nr = nline;
	w->ww_b.nc = ncol;

	w->ww_i.t = MAX(w->ww_w.t, 0);
	w->ww_i.b = MIN(w->ww_w.b, wwnrow);
	w->ww_i.l = MAX(w->ww_w.l, 0);
	w->ww_i.r = MIN(w->ww_w.r, wwncol);
	w->ww_i.nr = w->ww_i.b - w->ww_i.t;
	w->ww_i.nc = w->ww_i.r - w->ww_i.l;

	w->ww_cur.r = w->ww_w.t;
	w->ww_cur.c = w->ww_w.l;

	if (flags & WWO_PTY) {
		struct winsize winsize;

		if (wwgetpty(w) < 0)
			goto bad;
		if (wwsettty(w->ww_pty, &wwwintty, (struct ww_tty *)0) < 0)
			goto bad;
		winsize.ws_row = nrow;
		winsize.ws_col = ncol;
		winsize.ws_xpixel = winsize.ws_ypixel = 0;
		if (ioctl(w->ww_pty, (int)TIOCSWINSZ, (char *)&winsize) < 0) {
			wwerrno = WWE_SYS;
			goto bad;
		}
		w->ww_ispty = 1;
	} else if (flags & WWO_SOCKET) {
		int d[2];
		if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, d) < 0) {
			wwerrno = WWE_SYS;
			goto bad;
		}
		w->ww_pty = d[0];
		w->ww_socket = d[1];
	}
	if (flags & (WWO_PTY|WWO_SOCKET)) {
		if ((w->ww_ob = malloc(512)) == 0) {
			wwerrno = WWE_NOMEM;
			goto bad;
		}
		w->ww_obe = w->ww_ob + 512;
		w->ww_obp = w->ww_obq = w->ww_ob;
	}

	w->ww_win = wwalloc(w->ww_w.t, w->ww_w.l,
		w->ww_w.nr, w->ww_w.nc, sizeof (char));
	if (w->ww_win == 0)
		goto bad;
	m = 0;
	if (flags & WWO_GLASS)
		m |= WWM_GLS;
	if (flags & WWO_REVERSE)
		m |= WWM_REV;
	for (i = w->ww_w.t; i < w->ww_w.b; i++)
		for (j = w->ww_w.l; j < w->ww_w.r; j++)
			w->ww_win[i][j] = m;

	if (flags & WWO_FRAME) {
		w->ww_fmap = wwalloc(w->ww_w.t, w->ww_w.l,
			w->ww_w.nr, w->ww_w.nc, sizeof (char));
		if (w->ww_fmap == 0)
			goto bad;
		for (i = w->ww_w.t; i < w->ww_w.b; i++)
			for (j = w->ww_w.l; j < w->ww_w.r; j++)
				w->ww_fmap[i][j] = 0;
	}

	w->ww_buf = (union ww_char **)
		wwalloc(w->ww_b.t, w->ww_b.l,
			w->ww_b.nr, w->ww_b.nc, sizeof (union ww_char));
	if (w->ww_buf == 0)
		goto bad;
	for (i = w->ww_b.t; i < w->ww_b.b; i++)
		for (j = w->ww_b.l; j < w->ww_b.r; j++)
			w->ww_buf[i][j].c_w = ' ';

	w->ww_nvis = (short *)malloc((unsigned) w->ww_w.nr * sizeof (short));
	if (w->ww_nvis == 0) {
		wwerrno = WWE_NOMEM;
		goto bad;
	}
	w->ww_nvis -= w->ww_w.t;
	nvis = m ? 0 : w->ww_w.nc;
	for (i = w->ww_w.t; i < w->ww_w.b; i++)
		w->ww_nvis[i] = nvis;

	w->ww_state = WWS_INITIAL;
	w->ww_oflags = flags;
	return wwindex[w->ww_index] = w;
bad:
	if (w != 0) {
		if (w->ww_win != 0)
			wwfree(w->ww_win, w->ww_w.t);
		if (w->ww_fmap != 0)
			wwfree(w->ww_fmap, w->ww_w.t);
		if (w->ww_buf != 0)
			wwfree((char **)w->ww_buf, w->ww_b.t);
		if (w->ww_nvis != 0)
			free((char *)(w->ww_nvis + w->ww_w.t));
		if (w->ww_ob != 0)
			free(w->ww_ob);
		if (w->ww_pty >= 0)
			(void) close(w->ww_pty);
		if (w->ww_socket >= 0)
			(void) close(w->ww_socket);
		free((char *)w);
	}
	return 0;
}