1 /****************************************************************************
2  * Copyright (c) 1998-2005,2007 Free Software Foundation, Inc.              *
3  *                                                                          *
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5  * copy of this software and associated documentation files (the            *
6  * "Software"), to deal in the Software without restriction, including      *
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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.   *
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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     *
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26  * authorization.                                                           *
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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 1.16 2007/07/21 20:18:10 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)"), 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