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28
29/****************************************************************************
30 * Author: Thomas Dickey                                                    *
31 ****************************************************************************/
32
33/*
34**	lib_inwstr.c
35**
36**	The routines winnwstr() and winwstr().
37**
38*/
39
40#include <curses.priv.h>
41
42MODULE_ID("$Id: lib_inwstr.c,v 1.6 2011/05/28 22:49:49 tom Exp $")
43
44NCURSES_EXPORT(int)
45winnwstr(WINDOW *win, wchar_t *wstr, int n)
46{
47    int row, col, inx;
48    int count = 0;
49    int last = 0;
50    cchar_t *text;
51    wchar_t wch;
52
53    T((T_CALLED("winnwstr(%p,%p,%d)"), (void *) win, (void *) wstr, n));
54    if (wstr != 0) {
55	if (win) {
56	    getyx(win, row, col);
57
58	    text = win->_line[row].text;
59	    while (count < n && count != ERR) {
60		if (!isWidecExt(text[col])) {
61		    for (inx = 0; (inx < CCHARW_MAX)
62			 && ((wch = text[col].chars[inx]) != 0);
63			 ++inx) {
64			if (count + 1 > n) {
65			    if ((count = last) == 0) {
66				count = ERR;	/* error if we store nothing */
67			    }
68			    break;
69			}
70			wstr[count++] = wch;
71		    }
72		}
73		last = count;
74		if (++col > win->_maxx) {
75		    break;
76		}
77	    }
78	}
79	if (count > 0) {
80	    wstr[count] = '\0';
81	    T(("winnwstr returns %s", _nc_viswbuf(wstr)));
82	}
83    }
84    returnCode(count);
85}
86
87/*
88 * X/Open says winwstr() returns OK if not ERR.  If that is not a blunder, it
89 * must have a null termination on the string (see above).  Unlike winnstr(),
90 * it does not define what happens for a negative count with winnwstr().
91 */
92NCURSES_EXPORT(int)
93winwstr(WINDOW *win, wchar_t *wstr)
94{
95    int result = OK;
96
97    T((T_CALLED("winwstr(%p,%p)"), (void *) win, (void *) wstr));
98    if (win == 0) {
99	result = ERR;
100    } else if (winnwstr(win, wstr,
101			CCHARW_MAX * (win->_maxx - win->_curx + 1)) == ERR) {
102	result = ERR;
103    }
104    returnCode(result);
105}
106