/*   $NetBSD: insstr.c,v 1.12 2024/12/23 02:58:03 blymn Exp $ */

/*
 * Copyright (c) 2005 The NetBSD Foundation Inc.
 * All rights reserved.
 *
 * This code is derived from code donated to the NetBSD Foundation
 * by Ruibiao Qiu <ruibiao@arl.wustl.edu,ruibiao@gmail.com>.
 *
 *
 * 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.
 * 3. Neither the name of the NetBSD Foundation 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 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 REGENTS 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: insstr.c,v 1.12 2024/12/23 02:58:03 blymn Exp $");
#endif                                            /* not lint */

#include <string.h>
#include <stdlib.h>

#include "curses.h"
#include "curses_private.h"

#ifndef _CURSES_USE_MACROS

/*
 * insstr --
 *      insert a multi-byte character string into the current window
 */
int
insstr(const char *str)
{

        return winsstr(stdscr, str);
}

/*
 * insnstr --
 *      insert a multi-byte character string into the current window
 *      with at most n characters
 */
int
insnstr(const char *str, int n)
{

        return winsnstr(stdscr, str, n);
}

/*
 * mvinsstr --
 *        Do an insert-string on the line at (y, x).
 */
int
mvinsstr(int y, int x, const char *str)
{

        return mvwinsstr(stdscr, y, x, str);
}

/*
 * mvinsnstr --
 *        Do an insert-n-string on the line at (y, x).
 */
int
mvinsnstr(int y, int x, const char *str, int n)
{

        return mvwinsnstr(stdscr, y, x, str, n);
}

/*
 * mvwinsstr --
 *        Do an insert-string on the line at (y, x) in the given window.
 */
int
mvwinsstr(WINDOW *win, int y, int x, const char *str)
{

        if (wmove(win, y, x) == ERR)
                return ERR;

        return winsstr(win, str);
}

/*
 * mvwinsnstr --
 *        Do an insert-n-string on the line at (y, x) in the given window.
 */
int
mvwinsnstr(WINDOW *win, int y, int x, const char *str, int n)
{

        if (wmove(win, y, x) == ERR)
                return ERR;

        return winsnstr(win, str, n);
}

#endif

/*
 * winsstr --
 *      Do an insert-string on the line, leaving (cury, curx) unchanged.
 *      No wrapping.
 */
int
winsstr(WINDOW *win, const char *str)
{

        return winsnstr(win, str, -1);
}

/*
 * winsnstr --
 *      Do an insert-n-string on the line, leaving (cury, curx) unchanged.
 *      Performs wrapping.
 */
int
winsnstr(WINDOW *win, const char *str, int n)
{
        __LDATA *end, *temp1, *temp2;
        const char *scp;
        int len, x;
        __LINE *lnp;
#ifdef HAVE_WCHAR
        nschar_t *np, *tnp;
#endif /* HAVE_WCHAR */

        if (__predict_false(win == NULL))
                return ERR;

        /* find string length */
        if (n > 0)
                for (scp = str, len = 0; n-- && *scp++; ++len);
        else
                for (scp = str, len = 0; *scp++; ++len);
        __CTRACE(__CTRACE_INPUT, "winsnstr: len = %d\n", len);

        /* move string */
        end = &win->alines[win->cury]->line[win->curx];
        if (len < win->maxx - win->curx) {
                __CTRACE(__CTRACE_INPUT, "winsnstr: shift %d cells\n", len);
                temp1 = &win->alines[win->cury]->line[win->maxx - 1];
                temp2 = temp1 - len;
                while (temp2 >= end) {
#ifdef HAVE_WCHAR
                        np = temp1->nsp;
                        if (np){
                                while (np) {
                                        tnp = np->next;
                                        free(np);
                                        np = tnp;
                                }
                                temp1->nsp = NULL;
                        }
#endif /* HAVE_WCHAR */
                        (void)memcpy(temp1, temp2, sizeof(__LDATA));
                        temp1--, temp2--;
                }
        }

        for (scp = str, temp1 = end, x = win->curx;
             *scp && x < len + win->curx && x < win->maxx;
             scp++, temp1++, x++)
        {
                temp1->ch = (wchar_t)*scp & __CHARTEXT;
                temp1->attr = win->wattr;
                temp1->cflags &= ~CA_BACKGROUND;
                temp1->cflags &= ~CA_CONTINUATION;
#ifdef HAVE_WCHAR
                temp1->wcols = 1;
#endif /* HAVE_WCHAR */
        }
#ifdef DEBUG
        {
                int i;

                for (i = win->curx; i < win->curx + len; i++) {
                        __CTRACE(__CTRACE_INPUT,
                            "winsnstr: (%d,%d)=('%c',%x)\n", win->cury, i,
                            win->alines[win->cury]->line[i].ch,
                            win->alines[win->cury]->line[i].attr);
                }
        }
#endif /* DEBUG */
        lnp = win->alines[win->cury];
        lnp->flags |= __ISDIRTY;
        if (win->ch_off < *lnp->firstchp)
                *lnp->firstchp = win->ch_off;
        if (win->ch_off + win->maxx - 1 > *lnp->lastchp)
                *lnp->lastchp = win->ch_off + win->maxx - 1;
        __touchline(win, (int)win->cury, (int)win->curx, (int)win->maxx - 1);
        __sync(win);
        return OK;
}