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/* $NetBSD: multibyte_sb.c,v 1.5 2004/07/21 20:27:46 tshiozak Exp $ */
/*
* Copyright (c) 1991 The Regents of the University of California.
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 <LibConfig.h>
#include <sys/EfiCdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char *sccsid = "from: @(#)multibyte.c 5.1 (Berkeley) 2/18/91";
#else
__RCSID("$NetBSD: multibyte_sb.c,v 1.5 2004/07/21 20:27:46 tshiozak Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <wchar.h>
/*
* Stub multibyte character functions.
* This cheezy implementation is fixed to the native single-byte
* character set.
*/
/*ARGSUSED*/
int
mbsinit(const mbstate_t *ps)
{
return 1;
}
/*ARGSUSED*/
size_t
mbrlen(
const char *s,
size_t n,
mbstate_t *ps
)
{
/* ps appears to be unused */
if (s == NULL || *s == '\0')
return 0;
if (n == 0)
return (size_t)-1;
return 1;
}
int
mblen(
const char *s,
size_t n
)
{
/* s may be NULL */
return (int)mbrlen(s, n, NULL);
}
/*ARGSUSED*/
size_t
mbrtowc(
wchar_t *pwc,
const char *s,
size_t n,
mbstate_t *ps
)
{
/* pwc may be NULL */
/* s may be NULL */
/* ps appears to be unused */
if (s == NULL)
return 0;
if (n == 0)
return (size_t)-1;
if (pwc)
*pwc = (wchar_t) *s;
return (*s != '\0');
}
int
mbtowc(
wchar_t *pwc,
const char *s,
size_t n
)
{
/* pwc may be NULL */
/* s may be NULL */
return (int)mbrtowc(pwc, s, n, NULL);
}
/*ARGSUSED*/
size_t
wcrtomb(
char *s,
wchar_t wchar,
mbstate_t *ps
)
{
/* s may be NULL */
/* ps appears to be unused */
if (s == NULL)
return 1; /* Spec. says this should be 1. */
*s = (char) wchar;
return 1;
}
int
wctomb(
char *s,
wchar_t wchar
)
{
/*
If s is NULL just return if MB Characters have state
dependent encodings.
*/
if (s == NULL)
return 0;
return (int)wcrtomb(s, wchar, NULL);
}
/*ARGSUSED*/
size_t
mbsrtowcs(
wchar_t *pwcs,
const char **s,
size_t n,
mbstate_t *ps
)
{
int count = 0;
/* pwcs may be NULL */
/* s may be NULL */
/* ps appears to be unused */
if (!s || !*s)
return 0;
if (n != 0) {
if (pwcs != NULL) {
do {
if ((*pwcs++ = (wchar_t) *(*s)++) == 0) {
*s = NULL;
break;
}
count++;
} while (--n != 0);
} else {
do {
if (((wchar_t)*(*s)++) == 0)
break;
count++;
} while (--n != 0);
}
}
return count;
}
size_t
mbstowcs(
wchar_t *pwcs,
const char *s,
size_t n
)
{
/* pwcs may be NULL */
/* s may be NULL */
return mbsrtowcs(pwcs, &s, n, NULL);
}
/*ARGSUSED*/
size_t
wcsrtombs(
char *s,
const wchar_t **pwcs,
size_t n,
mbstate_t *ps
)
{
int count = 0;
/* s may be NULL */
/* pwcs may be NULL */
/* ps appears to be unused */
if (pwcs == NULL || *pwcs == NULL)
return (0);
if (s == NULL) {
while (*(*pwcs)++ != 0)
count++;
return(count);
}
if (n != 0) {
do {
if ((*s++ = (char) *(*pwcs)++) == 0) {
*pwcs = NULL;
break;
}
count++;
} while (--n != 0);
}
return count;
}
size_t
wcstombs(
char *s,
const wchar_t *pwcs,
size_t n
)
{
/* s may be NULL */
/* pwcs may be NULL */
return wcsrtombs(s, &pwcs, n, NULL);
}
wint_t
btowc(int c)
{
if (c == EOF || c & ~0xFF)
return WEOF;
return (wint_t)c;
}
int
wctob(wint_t c)
{
/* wctob needs to be consistent with wcrtomb.
if wcrtomb says that a character is representable in 1 byte,
which this implementation always says, then wctob needs to
also represent the character as 1 byte.
*/
if (c == WEOF) {
return EOF;
}
return (int)(c & 0xFF);
}
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