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/* $OpenBSD: lib_unget_wch.c,v 1.1 2010/09/06 17:26:17 nicm Exp $ */
/****************************************************************************
* Copyright (c) 2002-2007,2008 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_unget_wch.c
**
** The routine unget_wch().
**
*/
#include <curses.priv.h>
MODULE_ID("$Id: lib_unget_wch.c,v 1.1 2010/09/06 17:26:17 nicm Exp $")
/*
* Wrapper for wcrtomb() which obtains the length needed for the given
* wide-character 'source'.
*/
NCURSES_EXPORT(size_t)
_nc_wcrtomb(char *target, wchar_t source, mbstate_t * state)
{
int result;
if (target == 0) {
wchar_t temp[2];
const wchar_t *tempp = temp;
temp[0] = source;
temp[1] = 0;
result = wcsrtombs(NULL, &tempp, 0, state);
} else {
result = wcrtomb(target, source, state);
}
if (!isEILSEQ(result) && (result == 0))
result = 1;
return result;
}
NCURSES_EXPORT(int)
unget_wch(const wchar_t wch)
{
int result = OK;
mbstate_t state;
size_t length;
int n;
T((T_CALLED("unget_wch(%#lx)"), (unsigned long) wch));
init_mb(state);
length = _nc_wcrtomb(0, wch, &state);
if (length != (size_t) (-1)
&& length != 0) {
char *string;
if ((string = (char *) malloc(length)) != 0) {
init_mb(state);
wcrtomb(string, wch, &state);
for (n = (int) (length - 1); n >= 0; --n) {
if (_nc_ungetch(SP, string[n]) != OK) {
result = ERR;
break;
}
}
free(string);
} else {
result = ERR;
}
} else {
result = ERR;
}
returnCode(result);
}
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