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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1997, by Sun Microsystems, Inc.
* All rights reserved.
*/
/*
Converts From: ISO2022-CN-EXT encoding.
Converts To: Taiwanese BIG5 encoding
*/
#include "iso2022-cn.h"
#include "cns11643_big5.h"
#include "gb2312_big5_TW.h"
/* Forward reference the functions constrained to the scope of this file */
static int chinese_to_big5( _iconv_st *, unsigned char **, size_t *, int);
static int gb_to_big5( _iconv_st*, unsigned char**, size_t* );
extern int errno;
size_t
_icv_iconv(_iconv_st *st, char **inbuf, size_t *inbytesleft,
char **outbuf, size_t *outbytesleft)
{
return iso2022_icv_iconv(st, inbuf, inbytesleft, (unsigned char**) outbuf, outbytesleft,
chinese_to_big5);
}
static int
cns_big5_comp(const void *p1, const void *p2)
{
table_t *ptr1 = (table_t*) p1, *ptr2 = (table_t*) p2;
long result = ptr1->key - ptr2->key;
return result == 0 ? 0 : result > 0 ? 1 : -1;
}
static int
chinese_to_big5( _iconv_st *st, unsigned char **outbuf, size_t *outbytesleft, int plane_no )
{
table_t key, *ptr;
if ( st->SSfunc == NONE && st->SOcharset == 'A') { /* GB2312 */
return gb_to_big5(st, outbuf, outbytesleft);
}
if ( plane_no < 0 || plane_no > 2 )/* Not a big5 */
return (1);
key.key = (unsigned long) ((st->keepc[0] & 0xff) << 8) + (st->keepc[1] & 0xff);
if (plane_no == 1)
ptr = (table_t*) bsearch(&key, cns_big5_tab1, MAX_CNS1_NUM, sizeof(table_t), cns_big5_comp);
else
ptr = (table_t*) bsearch(&key, cns_big5_tab2, MAX_CNS2_NUM, sizeof(table_t), cns_big5_comp);
if ( ptr == 0 || ptr->value == 0 )
return (1); /* No BIG5 code for this CNS code */
if ( *outbytesleft < 2 ){
st->_errno = errno = E2BIG;
return (-1);
}
*(*outbuf)++ = (unsigned char) ((ptr->value >> 8) & 0xff);
*(*outbuf)++ = (unsigned char) (ptr->value & 0xff);
(*outbytesleft) -= 2;
return (0);
}
static int
gb_big5_comp(const void *p1, const void *p2)
{
gb_big5 *ptr1 = (gb_big5*) p1, *ptr2 = (gb_big5*) p2;
long result = ptr1->gbcode - ptr2->gbcode;
return result == 0 ? 0 : result > 0 ? 1 : -1;
}
static int
gb_to_big5( _iconv_st *st, unsigned char **outbuf, size_t *outbytesleft )
{
gb_big5 *ptr, key;
key.gbcode = (unsigned long) ((st->keepc[0] | MSB) << 8) + (st->keepc[1] | MSB);
ptr = (gb_big5*) bsearch(&key, gb_big5_tab, BIG5MAX, sizeof(gb_big5), gb_big5_comp);
if ( ptr && ptr->big5code > 0 ) {
if ( *outbytesleft < 2 ){
st->_errno = errno = E2BIG;
return (-1);
}
*(*outbuf)++ = (unsigned char) ((ptr->big5code >> 8) & 0xff);
*(*outbuf)++ = (unsigned char) (ptr->big5code & 0xff);
(*outbytesleft) -= 2;
return (0);
}
else
return (1); /* No BIG5 code for this CNS code */
}
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