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/*-
* 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.
*/
#ifdef XPG4
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)utf2.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>
rune_t _UTF2_sgetrune __P((const char *, size_t, char const **));
int _UTF2_sputrune __P((rune_t, char *, size_t, char **));
static _utf_count[16] = {
1, 1, 1, 1, 1, 1, 1, 1,
0, 0, 0, 0, 2, 2, 3, 0,
};
int
_UTF2_init(rl)
_RuneLocale *rl;
{
rl->sgetrune = _UTF2_sgetrune;
rl->sputrune = _UTF2_sputrune;
_CurrentRuneLocale = rl;
__mb_cur_max = 3;
return (0);
}
rune_t
_UTF2_sgetrune(string, n, result)
const char *string;
size_t n;
char const **result;
{
int c;
if (n < 1 || (c = _utf_count[(*string >> 4) & 0xf]) > n) {
if (result)
*result = string;
return (_INVALID_RUNE);
}
switch (c) {
case 1:
if (result)
*result = string + 1;
return (*string & 0xff);
case 2:
if ((string[1] & 0xC0) != 0x80)
goto encoding_error;
if (result)
*result = string + 2;
return (((string[0] & 0x1F) << 6) | (string[1] & 0x3F));
case 3:
if ((string[1] & 0xC0) != 0x80 || (string[2] & 0xC0) != 0x80)
goto encoding_error;
if (result)
*result = string + 3;
return (((string[0] & 0x1F) << 12) | ((string[1] & 0x3F) << 6)
| (string[2] & 0x3F));
default:
encoding_error: if (result)
*result = string + 1;
return (_INVALID_RUNE);
}
}
int
_UTF2_sputrune(c, string, n, result)
rune_t c;
char *string, **result;
size_t n;
{
if (c & 0xF800) {
if (n >= 3) {
if (string) {
string[0] = 0xE0 | ((c >> 12) & 0x0F);
string[1] = 0x80 | ((c >> 6) & 0x3F);
string[2] = 0x80 | ((c) & 0x3F);
}
if (result)
*result = string + 3;
} else
if (result)
*result = NULL;
return (3);
} else
if (c & 0x0780) {
if (n >= 2) {
if (string) {
string[0] = 0xC0 | ((c >> 6) & 0x1F);
string[1] = 0x80 | ((c) & 0x3F);
}
if (result)
*result = string + 2;
} else
if (result)
*result = NULL;
return (2);
} else {
if (n >= 1) {
if (string)
string[0] = c;
if (result)
*result = string + 1;
} else
if (result)
*result = NULL;
return (1);
}
}
#endif /* XPG4 */
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