1/****************************************************************************
2 * Copyright (c) 1998-2005,2007 Free Software Foundation, Inc.              *
3 *                                                                          *
4 * Permission is hereby granted, free of charge, to any person obtaining a  *
5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
7 * without limitation the rights to use, copy, modify, merge, publish,      *
8 * distribute, distribute with modifications, sublicense, and/or sell       *
9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22 *                                                                          *
23 * Except as contained in this notice, the name(s) of the above copyright   *
24 * holders shall not be used in advertising or otherwise to promote the     *
25 * sale, use or other dealings in this Software without prior written       *
26 * authorization.                                                           *
27 ****************************************************************************/
28
29/****************************************************************************
30 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
31 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32 *     and: Thomas E. Dickey                        1996-on                 *
33 ****************************************************************************/
34
35/*
36**	lib_instr.c
37**
38**	The routine winnstr().
39**
40*/
41
42#include <curses.priv.h>
43
44MODULE_ID("$Id: lib_instr.c,v 1.16 2007/07/21 20:18:10 tom Exp $")
45
46NCURSES_EXPORT(int)
47winnstr(WINDOW *win, char *str, int n)
48{
49    int i = 0, row, col;
50
51    T((T_CALLED("winnstr(%p,%p,%d)"), win, str, n));
52
53    if (!str)
54	returnCode(0);
55
56    if (win) {
57	getyx(win, row, col);
58
59	if (n < 0)
60	    n = win->_maxx - win->_curx + 1;
61
62	for (; i < n;) {
63#if USE_WIDEC_SUPPORT
64	    cchar_t *cell = &(win->_line[row].text[col]);
65	    wchar_t *wch;
66	    attr_t attrs;
67	    short pair;
68	    int n2;
69	    bool done = FALSE;
70	    mbstate_t state;
71	    size_t i3, n3;
72	    char *tmp;
73
74	    if (!isWidecExt(*cell)) {
75		n2 = getcchar(cell, 0, 0, 0, 0);
76		if (n2 > 0
77		    && (wch = typeCalloc(wchar_t, (unsigned) n2 + 1)) != 0) {
78		    if (getcchar(cell, wch, &attrs, &pair, 0) == OK) {
79
80			init_mb(state);
81			n3 = wcstombs(0, wch, 0);
82			if (isEILSEQ(n3) || (n3 == 0)) {
83			    ;
84			} else if ((int) (n3 + i) > n) {
85			    done = TRUE;
86			} else if ((tmp = typeCalloc(char, n3 + 10)) == 0) {
87			    done = TRUE;
88			} else {
89			    init_mb(state);
90			    wcstombs(tmp, wch, n3);
91			    for (i3 = 0; i3 < n3; ++i3)
92				str[i++] = tmp[i3];
93			    free(tmp);
94			}
95		    }
96		    free(wch);
97		    if (done)
98			break;
99		}
100	    }
101#else
102	    str[i++] = (char) CharOf(win->_line[row].text[col]);
103#endif
104	    if (++col > win->_maxx) {
105		break;
106	    }
107	}
108    }
109    str[i] = '\0';		/* SVr4 does not seem to count the null */
110    T(("winnstr returns %s", _nc_visbuf(str)));
111    returnCode(i);
112}
113