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29 /****************************************************************************
30 * Author: Thomas E. Dickey 2002-on *
31 ****************************************************************************/
36 ** The routine get_wch().
40 #include <curses.priv.h>
43 MODULE_ID("$Id: lib_get_wch.c,v 1.24 2016/05/28 23:36:34 tom Exp $")
46 wget_wch(WINDOW *win, wint_t *result)
56 T((T_CALLED("wget_wch(%p)"), (void *) win));
59 * We can get a stream of single-byte characters and KEY_xxx codes from
60 * _nc_wgetch(), while we want to return a wide character or KEY_xxx code.
62 _nc_lock_global(curses);
63 sp = _nc_screen_of(win);
69 char buffer[(MB_LEN_MAX * 9) + 1]; /* allow some redundant shifts */
71 T(("reading %d of %d", (int) count + 1, (int) sizeof(buffer)));
72 code = _nc_wgetch(win, &value, TRUE EVENTLIST_2nd((_nc_eventlist
76 } else if (code == KEY_CODE_YES) {
78 * If we were processing an incomplete multibyte character,
79 * return an error since we have a KEY_xxx code which
80 * interrupts it. For some cases, we could improve this by
81 * writing a new version of lib_getch.c(!), but it is not clear
82 * whether the improvement would be worth the effort.
85 safe_ungetch(SP_PARM, value);
89 } else if (count + 1 >= sizeof(buffer)) {
90 safe_ungetch(SP_PARM, value);
96 buffer[count++] = (char) UChar(value);
98 status = count_mbytes(buffer, count, state);
101 if (check_mbytes(wch, buffer, count, state) != status) {
102 code = ERR; /* the two calls should match */
103 safe_ungetch(SP_PARM, value);
115 *result = (wint_t) value;
117 _nc_unlock_global(curses);
118 T(("result %#o", value));