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/****************************************************************************
* Copyright (c) 2002 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Thomas E. Dickey 2002 *
****************************************************************************/
/*
** lib_get_wch.c
**
** The routine get_wch().
**
*/
#include <curses.priv.h>
MODULE_ID("$Id$")
NCURSES_EXPORT(int)
wget_wch(WINDOW *win, wint_t * result)
{
int code;
char buffer[(MB_LEN_MAX * 9) + 1]; /* allow some redundant shifts */
int status;
mbstate_t state;
size_t count = 0;
unsigned long value;
wchar_t wch;
T((T_CALLED("wget_wch(%p)"), win));
/*
* We can get a stream of single-byte characters and KEY_xxx codes from
* _nc_wgetch(), while we want to return a wide character or KEY_xxx code.
*/
for (;;) {
T(("reading %d of %d", count + 1, sizeof(buffer)));
code = _nc_wgetch(win, &value, TRUE);
if (code == ERR) {
break;
} else if (code == KEY_CODE_YES) {
/*
* If we were processing an incomplete multibyte character, return
* an error since we have a KEY_xxx code which interrupts it. For
* some cases, we could improve this by writing a new version of
* lib_getch.c(!), but it is not clear whether the improvement
* would be worth the effort.
*/
if (count != 0) {
ungetch(value);
code = ERR;
}
break;
} else if (count + 1 >= sizeof(buffer)) {
ungetch(value);
code = ERR;
break;
} else {
buffer[count++] = UChar(value);
memset(&state, 0, sizeof(state));
status = mbrlen(buffer, count, &state);
if (status >= 0) {
memset(&state, 0, sizeof(state));
if ((int) mbrtowc(&wch, buffer, count, &state) != status) {
code = ERR; /* the two calls should match */
}
value = wch;
break;
}
}
}
*result = value;
T(("result %#lo", value));
returnCode(code);
}
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