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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) 2001 Sun Microsystems, Inc.
* All rights reserved.
*/
#include <stdio.h>
#include <errno.h>
#include <strings.h>
#include <stdlib.h>
#include "pc-iscii.h"
#define MSB 0x80
#define REPLACE_CHAR '?'
typedef struct _icv_state {
int dummy;
} _iconv_st;
static uchar
traverse_table(Entry *entry , int num, uchar pc_iscii)
{
int i=0;
uchar iscii=0;
for ( ; i < num; ++i) {
Entry en = entry[i];
if ( pc_iscii < en.pc_iscii ) break;
if ( pc_iscii >= en.pc_iscii && pc_iscii < en.pc_iscii + en.count ) {
iscii = (pc_iscii - en.pc_iscii) + en.iscii;
break;
}
}
return iscii;
}
void *
_icv_open()
{
_iconv_st *st;
if ((st = (_iconv_st*)malloc(sizeof(_iconv_st))) == NULL) {
errno = ENOMEM;
return ((void*)-1);
}
bzero(st, sizeof(_iconv_st));
return ((void*)st);
}
/*
* Close; called from iconv_close()
*/
void
_icv_close(_iconv_st *st)
{
if (!st)
errno = EBADF;
else
free(st);
}
size_t
_icv_iconv(_iconv_st *st, char **inbuf, size_t *inbytesleft,
char **outbuf, size_t *outbytesleft)
{
if (st == NULL) {
errno = EBADF;
return ((size_t) -1);
}
if (inbuf == NULL || *inbuf == NULL) { /* Reset request. */
return ((size_t)0);
}
/* a state machine for interpreting ISCII code */
while (*inbytesleft > 0 && *outbytesleft > 0) {
uchar c = (uchar)**inbuf;
if ( c & MSB ) {
uchar iscii = traverse_table(pciscii_isc_tbl,
sizeof(pciscii_isc_tbl)/sizeof(Entry), c);
if ( iscii ) **outbuf = iscii;
else **outbuf = REPLACE_CHAR;
} else { /* ASCII */
**outbuf = c;
}
(*inbuf)++;
(*inbytesleft)--;
(*outbuf)++;
(*outbytesleft)--;
}
if ( *inbytesleft > 0 && *outbytesleft == 0 ) {
errno = E2BIG;
return ((size_t)-1);
}
return ((size_t)(*inbytesleft));
}
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