ncurses 5.9 - patch 20110917
[ncurses.git] / ncurses / base / lib_instr.c
1 /****************************************************************************
2  * Copyright (c) 1998-2007,2009 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
44 MODULE_ID("$Id: lib_instr.c,v 1.17 2009/10/24 22:55:45 tom Exp $")
45
46 NCURSES_EXPORT(int)
47 winnstr(WINDOW *win, char *str, int n)
48 {
49     int i = 0, row, col;
50
51     T((T_CALLED("winnstr(%p,%p,%d)"), (void *) 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                             if (((int) n3 + i) > n) {
84                                 done = TRUE;
85                             } else if ((tmp = typeCalloc(char, n3 + 10)) == 0) {
86                                 done = TRUE;
87                             } else {
88                                 init_mb(state);
89                                 wcstombs(tmp, wch, n3);
90                                 for (i3 = 0; i3 < n3; ++i3)
91                                     str[i++] = tmp[i3];
92                                 free(tmp);
93                             }
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 }