1/****************************************************************************
2 * Copyright 2018,2020 Thomas E. Dickey                                     *
3 * Copyright 2004-2009,2016 Free Software Foundation, Inc.                  *
4 *                                                                          *
5 * Permission is hereby granted, free of charge, to any person obtaining a  *
6 * copy of this software and associated documentation files (the            *
7 * "Software"), to deal in the Software without restriction, including      *
8 * without limitation the rights to use, copy, modify, merge, publish,      *
9 * distribute, distribute with modifications, sublicense, and/or sell       *
10 * copies of the Software, and to permit persons to whom the Software is    *
11 * furnished to do so, subject to the following conditions:                 *
12 *                                                                          *
13 * The above copyright notice and this permission notice shall be included  *
14 * in all copies or substantial portions of the Software.                   *
15 *                                                                          *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
23 *                                                                          *
24 * Except as contained in this notice, the name(s) of the above copyright   *
25 * holders shall not be used in advertising or otherwise to promote the     *
26 * sale, use or other dealings in this Software without prior written       *
27 * authorization.                                                           *
28 ****************************************************************************/
29
30/****************************************************************************
31 *  Author: Thomas E. Dickey                                                *
32 ****************************************************************************/
33
34/*
35**	lib_insnstr.c
36**
37**	The routine winsnstr().
38**
39*/
40
41#include <curses.priv.h>
42#include <ctype.h>
43
44MODULE_ID("$Id: lib_insnstr.c,v 1.7 2020/02/02 23:34:34 tom Exp $")
45
46NCURSES_EXPORT(int)
47winsnstr(WINDOW *win, const char *s, int n)
48{
49    int code = ERR;
50    const unsigned char *str = (const unsigned char *) s;
51
52    T((T_CALLED("winsnstr(%p,%s,%d)"), (void *) win, _nc_visbufn(s, n), n));
53
54    if (win != 0 && str != 0) {
55	SCREEN *sp = _nc_screen_of(win);
56#if USE_WIDEC_SUPPORT
57	/*
58	 * If the output contains "wide" (multibyte) characters, we will not
59	 * really know the width of a character until we get the last byte
60	 * of the character.  Since the preceding byte(s) may use more columns
61	 * on the screen than the final character, it is best to route the
62	 * call to the wins_nwstr() function.
63	 */
64	if (sp->_screen_unicode) {
65	    size_t nn = (n > 0) ? (size_t) n : strlen(s);
66	    wchar_t *buffer = typeMalloc(wchar_t, nn + 1);
67	    if (buffer != 0) {
68		mbstate_t state;
69		size_t n3;
70		init_mb(state);
71		n3 = mbstowcs(buffer, s, nn);
72		if (n3 != (size_t) (-1)) {
73		    code = wins_nwstr(win, buffer, (int) n3);
74		}
75		free(buffer);
76	    }
77	}
78	if (code == ERR)
79#endif
80	{
81	    NCURSES_SIZE_T oy = win->_cury;
82	    NCURSES_SIZE_T ox = win->_curx;
83	    const unsigned char *cp;
84
85	    for (cp = str; (n <= 0 || (cp - str) < n) && *cp; cp++) {
86		_nc_insert_ch(sp, win, (chtype) UChar(*cp));
87	    }
88	    win->_curx = ox;
89	    win->_cury = oy;
90	    _nc_synchook(win);
91	    code = OK;
92	}
93    }
94    returnCode(code);
95}
96