/*      $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 ([email protected]).
*
* 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;
}