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curses: fix ripoffline

When creating stdscr, ensure it's placed and sized in accordance with
lines ripped off.
LINES is no longer adjusted for lines ripped off.
POSIX makes no mention that it should be adjusted.
Bottom lines are now placed correctly.
Lines ripped off are now displayed after calling initscr.

ok kamil@

Fixes PR #53635

/*	$NetBSD: fileio.c,v 1.6 2018/10/02 17:35:44 roy Exp $	*/

/*-
 * Copyright (c) 2008 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Julian Coleman.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: fileio.c,v 1.6 2018/10/02 17:35:44 roy Exp $");
#endif				/* not lint */

#include "curses.h"
#include "curses_private.h"
#include "fileio.h"
#include <stdio.h>
#include <stdlib.h>

#ifdef HAVE_WCHAR
static int __putnsp(nschar_t *, FILE *);
static int __getnsp(nschar_t *, FILE *);
#endif /* HAVE_WCHAR */

#ifdef HAVE_WCHAR
/*
 * __putnsp --
 *	Write non-spacing character chain to file, consisting of:
 *	((int) 1, (wchar_t) ch) pairs followed by (int) 0.
 */
static int
__putnsp(nschar_t *nsp, FILE *fp)
{
	int n;

	n = 1;
	while (nsp != NULL) {
		if (fwrite(&n, sizeof(int), 1, fp) != 1)
			return ERR;
		if (fwrite(&nsp->ch, sizeof(wchar_t), 1, fp) != 1)
			return ERR;
	}
	n = 0;
	if (fwrite(&n, sizeof(int), 1, fp) != 1)
		return ERR;

	return OK;
}
#endif /* HAVE_WCHAR */

/*
 * putwin --
 *	Write window data to file
 */
int
putwin(WINDOW *win, FILE *fp)
{
	int major = CURSES_LIB_MAJOR;
	int minor = CURSES_LIB_MINOR;
	int y, x;
	__LDATA *sp;

#ifdef DEBUG
	__CTRACE(__CTRACE_FILEIO, "putwin: win %p\n", win);
#endif

	if (win == NULL)
		return ERR;

	/* win can't be a subwin */
	if (win->orig != NULL)
		return ERR;

	/* Library version */
	if (fwrite(&major, sizeof(int), 1, fp) != 1)
		return ERR;
	if (fwrite(&minor, sizeof(int), 1, fp) != 1)
		return ERR;

	/* Window parameters */
	if (fwrite(win, sizeof(WINDOW), 1, fp) != 1)
		return ERR;
#ifdef HAVE_WCHAR
	/* Background non-spacing character */
	if (__putnsp(win->bnsp, fp) == ERR)
		return ERR;
#endif /* HAVE_WCHAR */

	/* Lines and line data */
	for (y = 0; y < win->maxy; y++)
		for (sp = win->alines[y]->line, x = 0; x < win->maxx;
		    x++, sp++) {
			if (fwrite(&sp->ch, sizeof(wchar_t), 1, fp) != 1)
				return ERR;
			if (fwrite(&sp->attr, sizeof(attr_t), 1, fp) != 1)
				return ERR;
#ifdef HAVE_WCHAR
			if (sp->nsp != NULL) {
				if (__putnsp(win->bnsp, fp) == ERR)
					return ERR;
			}
#endif /* HAVE_WCHAR */
		}

	return OK;
}

#ifdef HAVE_WCHAR
/*
 * __getnsp --
 *	Read non-spacing character chain from file
 */
static int
__getnsp(nschar_t *nsp, FILE *fp)
{
	int n;
	nschar_t *onsp, *tnsp;

	if (fread(&n, sizeof(int), 1, fp) != 1)
		return ERR;
	onsp = nsp;
	while (n != 0) {
		tnsp = malloc(sizeof(nschar_t));
		if (tnsp == NULL) {
			__cursesi_free_nsp(nsp);
			return OK;
		}
		if (fread(&tnsp->ch, sizeof(wchar_t), 1, fp) != 1) {
			__cursesi_free_nsp(nsp);
			return OK;
		}
		tnsp->next = NULL;
		onsp->next = tnsp;
		onsp = onsp->next;
		if (fread(&n, sizeof(int), 1, fp) != 1) {
			__cursesi_free_nsp(nsp);
			return ERR;
		}
	}
	return OK;
}
#endif /* HAVE_WCHAR */

/*
 * getwin --
 *	Read window data from file
 */
WINDOW *
getwin(FILE *fp)
{
	int major, minor;
	WINDOW *wtmp, *win;
	int y, x;
	__LDATA *sp;

#ifdef DEBUG
	__CTRACE(__CTRACE_FILEIO, "getwin\n");
#endif

	/* Check library version */
	if (fread(&major, sizeof(int), 1, fp) != 1)
		return NULL;
	if (fread(&minor, sizeof(int), 1, fp) != 1)
		return NULL;
	if(major != CURSES_LIB_MAJOR || minor != CURSES_LIB_MINOR)
		return NULL;

	/* Window parameters */
	wtmp = malloc(sizeof(WINDOW));
	if (wtmp == NULL)
		return NULL;
	if (fread(wtmp, sizeof(WINDOW), 1, fp) != 1)
		goto error0;
	win = __newwin(_cursesi_screen, wtmp->maxy, wtmp->maxx,
	    wtmp->begy, wtmp->begx, FALSE, FALSE);
	if (win == NULL)
		goto error0;
	win->cury = wtmp->cury;
	win->curx = wtmp->curx;
	win->reqy = wtmp->reqy;
	win->reqx = wtmp->reqx;
	win->flags = wtmp->flags;
	win->delay = wtmp->delay;
	win->wattr = wtmp->wattr;
	win->bch = wtmp->bch;
	win->battr = wtmp->battr;
	win->scr_t = wtmp->scr_t;
	win->scr_b = wtmp->scr_b;
	free(wtmp);
	wtmp = NULL;
	__swflags(win);

#ifdef HAVE_WCHAR
	if (__getnsp(win->bnsp, fp) == ERR)
		goto error1;
#endif /* HAVE_WCHAR */

	/* Lines and line data */
	for (y = 0; y < win->maxy; y++) {
		for (sp = win->alines[y]->line, x = 0; x < win->maxx;
		    x++, sp++) {
			if (fread(&sp->ch, sizeof(wchar_t), 1, fp) != 1)
				goto error1;
			if (fread(&sp->attr, sizeof(attr_t), 1, fp) != 1)
				goto error1;
#ifdef HAVE_WCHAR
			if (sp->nsp != NULL) {
				if (__getnsp(win->bnsp, fp) == ERR)
					goto error1;
			}
#endif /* HAVE_WCHAR */
		}
		__touchline(win, y, 0, (int) win->maxx - 1);
	}
#ifdef DEBUG
	__CTRACE(__CTRACE_FILEIO, "getwin: win = 0x%p\n", win);
#endif
	return win;

error1:
	delwin(win);
error0:
	if (wtmp)
		free(wtmp);
	return NULL;
}