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/* $OpenBSD: citrus_none.c,v 1.9 2016/09/07 17:10:43 schwarze Exp $ */
/* $NetBSD: citrus_none.c,v 1.18 2008/06/14 16:01:07 tnozaki Exp $ */
/*-
* Copyright (c)2002 Citrus Project,
* 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/types.h>
#include <errno.h>
#include <string.h>
#include <wchar.h>
#include "citrus_ctype.h"
static char wrapv(unsigned char);
/*
* Convert an unsigned char value into a char value without relying on
* signed overflow behavior.
*/
static char
wrapv(unsigned char ch)
{
if (ch >= 0x80)
return (int)ch - 0x100;
else
return ch;
}
size_t
_citrus_none_ctype_mbrtowc(wchar_t * __restrict pwc,
const char * __restrict s, size_t n)
{
if (s == NULL)
return 0;
if (n == 0)
return -2;
if (pwc != NULL)
*pwc = (wchar_t)(unsigned char)*s;
return *s != '\0';
}
size_t
_citrus_none_ctype_mbsnrtowcs(wchar_t * __restrict dst,
const char ** __restrict src, size_t nmc, size_t len)
{
size_t i;
if (dst == NULL)
return strnlen(*src, nmc);
for (i = 0; i < nmc && i < len; i++)
if ((dst[i] = (wchar_t)(unsigned char)(*src)[i]) == L'\0') {
*src = NULL;
return i;
}
*src += i;
return i;
}
size_t
_citrus_none_ctype_wcrtomb(char * __restrict s, wchar_t wc)
{
if (s == NULL)
return 1;
if (wc < 0 || wc > 0xff) {
errno = EILSEQ;
return -1;
}
*s = wrapv(wc);
return 1;
}
size_t
_citrus_none_ctype_wcsnrtombs(char * __restrict dst,
const wchar_t ** __restrict src, size_t nwc, size_t len)
{
size_t i;
if (dst == NULL) {
for (i = 0; i < nwc; i++) {
wchar_t wc = (*src)[i];
if (wc < 0 || wc > 0xff) {
errno = EILSEQ;
return -1;
}
if (wc == L'\0')
return i;
}
return i;
}
for (i = 0; i < nwc && i < len; i++) {
wchar_t wc = (*src)[i];
if (wc < 0 || wc > 0xff) {
*src += i;
errno = EILSEQ;
return -1;
}
dst[i] = wrapv(wc);
if (wc == L'\0') {
*src = NULL;
return i;
}
}
*src += i;
return i;
}
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