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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) 1994, 1995 by Sun Microsystems, Inc.
* Copyright (c) 1994, Nihon Sun Microsystems K.K.
* All Rights Reserved.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <ctype.h>
#define MAGIC_NUMBER (0x216513)
#define ERR_RETURN (-1) /* result code on error */
#define GET(c) ((c) = *ip, ip++, ileft--)
#define PUT(c) (*op = (c), op++, oleft--)
#define UNGET() (ip--, ileft++)
/*
* Open; called from iconv_open()
*/
void *
_icv_open()
{
return ((void*)MAGIC_NUMBER);
}
/*
* Close; called from iconv_close
*/
void
_icv_close(int* cd)
{
if (!cd || cd != (int*)MAGIC_NUMBER)
errno = EBADF;
}
/*
* Actual conversion; called from iconv()
*/
size_t
_icv_iconv(int* cd, char **inbuf, size_t *inbytesleft,
char **outbuf, size_t *outbytesleft)
{
unsigned char *ip, ic, *op;
size_t ileft, oleft;
size_t retval = 0;
if (!cd || cd != (int*)MAGIC_NUMBER)
{
errno = EBADF;
return((size_t)ERR_RETURN);
}
if ((inbuf == 0) || (*inbuf == 0))
return((size_t)0);
ip = (unsigned char*)*inbuf;
op = (unsigned char *)*outbuf;
ileft = *inbytesleft;
oleft = *outbytesleft;
/*
* Main loop; basically 1 loop per 1 input byte
*/
while (ileft > 0) {
GET(ic);
if (oleft < 1) {
UNGET();
errno = E2BIG;
retval = ERR_RETURN;
goto ret;
}
if (isascii(ic))
PUT(ic);
else {
PUT('_');
retval++;
}
}
ret:
*inbuf = (char *)ip;
*inbytesleft = ileft;
*outbuf = (char *)op;
*outbytesleft = oleft;
return (retval);
}
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