1 /****************************************************************************
2 * Copyright 2018-2022,2023 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
44 MODULE_ID("$Id: lib_insnstr.c,v 1.10 2023/11/21 21:58:03 tom Exp $")
45
NCURSES_EXPORT(int)46 NCURSES_EXPORT(int)
47 winsnstr(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 && n != 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 buffer[n3] = '\0';
74 code = wins_nwstr(win, buffer, (int) n3);
75 }
76 free(buffer);
77 }
78 }
79 if (code == ERR)
80 #endif
81 {
82 NCURSES_SIZE_T oy = win->_cury;
83 NCURSES_SIZE_T ox = win->_curx;
84 const unsigned char *cp;
85
86 for (cp = str; (n < 0 || (cp - str) < n) && *cp; cp++) {
87 _nc_insert_ch(sp, win, (chtype) UChar(*cp));
88 }
89 win->_curx = ox;
90 win->_cury = oy;
91 _nc_synchook(win);
92 code = OK;
93 }
94 }
95 returnCode(code);
96 }
97