1 /****************************************************************************
2 * Copyright 2020,2021 Thomas E. Dickey *
3 * Copyright 1998-2016,2017 Free Software Foundation, Inc. *
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 *
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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: *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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28 ****************************************************************************/
30 /****************************************************************************
31 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
32 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
33 * and: Thomas E. Dickey 1996-on *
34 ****************************************************************************/
39 ** The routine winnstr().
43 #include <curses.priv.h>
45 MODULE_ID("$Id: lib_instr.c,v 1.25 2021/04/03 22:24:18 tom Exp $")
48 winnstr(WINDOW *win, char *str, int n)
52 T((T_CALLED("winnstr(%p,%p,%d)"), (void *) win, str, n));
59 NCURSES_CH_T *text = win->_line[row].text;
62 n = win->_maxx - col + 1;
66 cchar_t *cell = &(text[col]);
71 if (!isWidecExt(*cell)) {
75 n2 = getcchar(cell, 0, 0, 0, 0);
77 && (wch = typeCalloc(wchar_t, (unsigned) n2 + 1)) != 0) {
80 if (getcchar(cell, wch, &attrs, &pair, 0) == OK) {
85 n3 = wcstombs(0, wch, (size_t) 0);
86 if (!isEILSEQ(n3) && (n3 != 0)) {
87 size_t need = n3 + 10 + (size_t) i;
88 int have = (int) n3 + i;
90 /* check for loop-done as well as overflow */
91 if (have > n || (int) need <= 0) {
93 } else if ((tmp = typeCalloc(char, need)) == 0) {
99 wcstombs(tmp, wch, n3);
100 for (i3 = 0; i3 < n3; ++i3)
112 str[i++] = (char) CharOf(text[col]);
114 if (++col > win->_maxx) {
118 str[i] = '\0'; /* SVr4 does not seem to count the null */
120 T(("winnstr returns %s", _nc_visbuf(str)));