/*      $NetBSD: addchnstr.c,v 1.10 2024/12/23 02:58:03 blymn Exp $     */

/*
 * Copyright (c) 2003 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Douwe Kiela (virtus@wanadoo.nl).
 *
 * 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: addchnstr.c,v 1.10 2024/12/23 02:58:03 blymn Exp $");
#endif                          /* not lint */

#include <stdlib.h>

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

#ifndef _CURSES_USE_MACROS

/*
 * addchstr --
 *      Add a string to stdscr starting at (_cury, _curx).
 */
int
addchstr(const chtype *chstr)
{
        return waddchnstr(stdscr, chstr, -1);
}

/*
 * waddchstr --
 *      Add a string to the given window starting at (_cury, _curx).
 */
int
waddchstr(WINDOW *win, const chtype *chstr)
{
        return waddchnstr(win, chstr, -1);
}

/*
 * addchnstr --
 *      Add a string (at most n characters) to stdscr starting
 *      at (_cury, _curx).  If n is negative, add the entire string.
 */
int
addchnstr(const chtype *chstr, int n)
{
        return waddchnstr(stdscr, chstr, n);
}

/*
 * mvaddchstr --
 *      Add a string to stdscr starting at (y, x)
 */
int
mvaddchstr(int y, int x, const chtype *chstr)
{
        return mvwaddchnstr(stdscr, y, x, chstr, -1);
}

/*
 * mvwaddchstr --
 *      Add a string to the given window starting at (y, x)
 */
int
mvwaddchstr(WINDOW *win, int y, int x, const chtype *chstr)
{
        return mvwaddchnstr(win, y, x, chstr, -1);
}

/*
 * mvaddchnstr --
 *      Add a string of at most n characters to stdscr
 *      starting at (y, x).
 */
int
mvaddchnstr(int y, int x, const chtype *chstr, int n)
{
        return mvwaddchnstr(stdscr, y, x, chstr, n);
}

/*
 * mvwaddchnstr --
 *      Add a string of at most n characters to the given window
 *      starting at (y, x).
 */
int
mvwaddchnstr(WINDOW *win, int y, int x, const chtype *chstr, int n)
{
        if (wmove(win, y, x) == ERR)
                return ERR;

        return waddchnstr(win, chstr, n);
}

#endif

/*
 * waddchnstr --
 *      Add a string (at most n characters) to the given window
 *      starting at (_cury, _curx) until the end of line is reached or
 *      n characters have been added.  If n is negative, add as much
 *      of the string that will fit on the current line.  SUSv2 says
 *      that the addchnstr family does not wrap and strings are truncated
 *      to the RHS of the window.
 */
int
waddchnstr(WINDOW *win, const chtype *chstr, int n)
{
        size_t  len;
        const chtype *chp;
        attr_t  attr;
        char    *ocp, *cp, *start;
        int i, ret, ox, oy;

        __CTRACE(__CTRACE_INPUT, "waddchnstr: win = %p, chstr = %p, n = %d\n",
            win, chstr, n);

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

        if (n >= 0)
                for (chp = chstr, len = 0; n-- && *chp++; ++len);
        else
                for (chp = chstr, len = 0; *chp++; ++len);

        /* check if string is too long for current location */
        if (len > (win->maxx - win->curx))
                len = win->maxx - win->curx;

        if ((ocp = malloc(len + 1)) == NULL)
                return ERR;
        chp = chstr;
        cp = ocp;
        start = ocp;
        i = 0;
        attr = (*chp) & __ATTRIBUTES;
        ox = win->curx;
        oy = win->cury;
        while (len) {
                *cp = (*chp) & __CHARTEXT;
                cp++;
                chp++;
                i++;
                len--;
                if (((*chp) & __ATTRIBUTES) != attr) {
                        *cp = '\0';
                        if (_cursesi_waddbytes(win, start, i, attr, 0) == ERR) {
                                free(ocp);
                                return ERR;
                        }
                        attr = (*chp) & __ATTRIBUTES;
                        start = cp;
                        i = 0;
                }
        }
        *cp = '\0';
        ret = _cursesi_waddbytes(win, start, i, attr, 0);
        free(ocp);
        wmove(win, oy, ox);
        return ret;
}