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/*-
* Copyright (c) 2003 Tim J. Robbins
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <limits.h>
#include <rune.h>
#include <string.h>
#include <wchar.h>
/*
* Emulate the deprecated 4.4BSD sgetrune() function in terms of
* the ISO C mbrtowc() function.
*/
rune_t
__emulated_sgetrune(const char *string, size_t n, const char **result)
{
wchar_t wc;
size_t nconv;
/*
* Pass a NULL conversion state to mbrtowc() since multibyte
* conversion states are not supported.
*/
nconv = mbrtowc(&wc, string, n, NULL);
if (nconv == (size_t)-2) {
if (result != NULL)
*result = string;
return (_INVALID_RUNE);
}
if (nconv == (size_t)-1) {
if (result != NULL)
*result = string + 1;
return (_INVALID_RUNE);
}
if (nconv == 0)
nconv = 1;
if (result != NULL)
*result = string + nconv;
return ((rune_t)wc);
}
/*
* Emulate the deprecated 4.4BSD sputrune() function in terms of
* the ISO C wcrtomb() function.
*/
int
__emulated_sputrune(rune_t rune, char *string, size_t n, char **result)
{
char buf[MB_LEN_MAX];
size_t nconv;
nconv = wcrtomb(buf, (wchar_t)rune, NULL);
if (nconv == (size_t)-1) {
if (result != NULL)
*result = NULL;
return (0);
}
if (string == NULL) {
if (result != NULL)
*result = (char *)0 + nconv;
} else if (n >= nconv) {
memcpy(string, buf, nconv);
if (result != NULL)
*result = string + nconv;
} else {
if (result != NULL)
*result = NULL;
}
return (nconv);
}
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