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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) 2008, by Sun Microsystems, Inc.
* All rights reserved.
*/
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/types.h>
#define __NEED_UNI_2_VISCII__
#include <unicode_viscii.h> /* Unicode to VISCII mapping table */
#include "common_defs.h"
#define NON_ID_CHAR '?' /* non-identified character */
typedef struct _icv_state {
int _errno; /* internal errno */
} _iconv_st;
/*
* Open; called from iconv_open()
*/
void *
_icv_open()
{
_iconv_st *st;
if ((st = (_iconv_st *)malloc(sizeof(_iconv_st))) == NULL) {
errno = ENOMEM;
return ((void *) -1);
}
st->_errno = 0;
return ((void *) st);
}
/*
* Close; called from iconv_close()
*/
void
_icv_close(_iconv_st *st)
{
if (!st)
errno = EBADF;
else
free(st);
}
/*
* Actual conversion; called from iconv()
*/
size_t
_icv_iconv(_iconv_st *st, char **inbuf, size_t *inbytesleft,
char **outbuf, size_t *outbytesleft)
{
int no_id_char_num = 0;
#ifdef DEBUG
fprintf(stderr, "========== iconv(): UCS-2 --> viscii ==========\n");
#endif
if (st == NULL) {
errno = EBADF;
return ((size_t) -1);
}
if (inbuf == NULL || *inbuf == NULL) { /* Reset request. */
st->_errno = 0;
return ((size_t) 0);
}
st->_errno = 0; /* reset internal errno */
errno = 0; /* reset external errno */
/* convert UCS-2 encoding to viscii */
while (*inbytesleft > 0 && *outbytesleft > 0) {
unsigned long uni = 0;
unsigned char c1 = 0, c2 = 0;
unsigned char ch = 0;
c1 = **inbuf;
if (*inbytesleft <= 1) {
errno = EINVAL;
return ((size_t)-1);
}
(*inbuf)++;
(*inbytesleft) -= 1;
c2 = **inbuf;
(*inbuf)++;
(*inbytesleft) -= 1;
#if defined(UCS_2LE)
uni |= (unsigned long)c1;
uni |= (unsigned long)c2 << 8;
#else
uni |= (unsigned long)c1 << 8;
uni |= (unsigned long)c2;
#endif
if ( *inbytesleft > 0 && *outbytesleft <= 0 ) {
errno = E2BIG;
return ((size_t)-1);
}
if (uni_2_viscii(uni, &ch) == 1) {
**outbuf = ch;
} else {
**outbuf = NON_ID_CHAR;
no_id_char_num += 1;
}
(*outbuf) += 1;
(*outbytesleft) -= 1;
}
return ((size_t)no_id_char_num);
}
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