121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/*-
|
|
* Copyright (c) 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Paul Borman at Krystal Technologies.
|
|
*
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char sccsid[] = "@(#)big5.c 8.1 (Berkeley) 6/4/93";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include <errno.h>
|
|
#include <rune.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
|
|
rune_t _BIG5_sgetrune __P((const char *, size_t, char const **));
|
|
int _BIG5_sputrune __P((rune_t, char *, size_t, char **));
|
|
|
|
int
|
|
_BIG5_init(rl)
|
|
_RuneLocale *rl;
|
|
{
|
|
rl->sgetrune = _BIG5_sgetrune;
|
|
rl->sputrune = _BIG5_sputrune;
|
|
_CurrentRuneLocale = rl;
|
|
__mb_cur_max = 2;
|
|
return (0);
|
|
}
|
|
|
|
static inline int
|
|
_big5_check(c)
|
|
u_int c;
|
|
{
|
|
c &= 0xff;
|
|
return ((c >= 0xa1 && c <= 0xfe) ? 2 : 1);
|
|
}
|
|
|
|
rune_t
|
|
_BIG5_sgetrune(string, n, result)
|
|
const char *string;
|
|
size_t n;
|
|
char const **result;
|
|
{
|
|
rune_t rune = 0;
|
|
int len;
|
|
|
|
if (n < 1 || (len = _big5_check(*string)) > n) {
|
|
if (result)
|
|
*result = string;
|
|
return (_INVALID_RUNE);
|
|
}
|
|
while (--len >= 0)
|
|
rune = (rune << 8) | ((u_int)(*string++) & 0xff);
|
|
if (result)
|
|
*result = string;
|
|
return rune;
|
|
}
|
|
|
|
int
|
|
_BIG5_sputrune(c, string, n, result)
|
|
rune_t c;
|
|
char *string, **result;
|
|
size_t n;
|
|
{
|
|
if (c & 0x8000) {
|
|
if (n >= 2) {
|
|
string[0] = (c >> 8) & 0xff;
|
|
string[1] = c & 0xff;
|
|
if (result)
|
|
*result = string + 2;
|
|
return (2);
|
|
}
|
|
}
|
|
else {
|
|
if (n >= 1) {
|
|
*string = c & 0xff;
|
|
if (result)
|
|
*result = string + 1;
|
|
return (1);
|
|
}
|
|
}
|
|
if (result)
|
|
*result = string;
|
|
return (0);
|
|
|
|
}
|