/*
 * 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 AND PERMISSION NOTICE
 *
 * Copyright (c) 1991-2005 Unicode, Inc. All rights reserved. Distributed
 * under the Terms of Use in http://www.unicode.org/copyright.html.
 *
 * This file has been modified by Sun Microsystems, Inc.
 */
/*
 * Copyright 1999-2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */


#if     defined(DEBUG)
#include <stdio.h>
#endif  /* DEBUG */
#include <stdlib.h>
#include <errno.h>

#define JFP_ICONV_STATELESS
#include "japanese.h"
#include "jfp_iconv_unicode.h"

void *
_icv_open(void)
{
        return (_icv_open_stateless());
}

void
_icv_close(void *cd)
{
        _icv_close_stateless(cd);
        return;
}

size_t
_icv_iconv(void *cd, char **inbuf, size_t *inbytesleft,
                                char **outbuf, size_t *outbytesleft)
{
        size_t          rv = (size_t)0;
        unsigned int    ucs4;

        unsigned char   *ip;
        size_t          ileft;
        char            *op;
        size_t          oleft;

        /*
         * If inbuf and/or *inbuf are NULL, reset conversion descriptor
         * and put escape sequence if needed.
         */
        if ((inbuf == NULL) || (*inbuf == NULL)) {
                /* nothing to do here for this module */
                return ((size_t)0);
        }

        ip = (unsigned char *)*inbuf;
        ileft = *inbytesleft;
        op = *outbuf;
        oleft = *outbytesleft;

        while (ileft != 0) {
                if (utf8_ucs(&ucs4, &ip, &ileft) == (size_t)-1) {
                        /* errno has been set in utf8_ucs() */
                        rv = (size_t)-1;
                        goto ret;
                }

                if (ucs4 == 0xff5e)             /* FULLWIDTH TILDE */
                        ucs4 = 0x301c;          /* WAVE DASH */
                else if (ucs4 == 0x2225)        /* PARALLEL TO */
                        ucs4 = 0x2016;          /* DOUBLE VERTICAL BAR/LINE */
                else if (ucs4 == 0xff0d)        /* FULLWIDTH MINUS SIGN */
                        ucs4 = 0x2212;          /* MINUS SIGN */
                else if (ucs4 == 0xffe0)        /* FULLWIDTH CENT SIGN */
                        ucs4 = 0x00a2;          /* CENT SIGN */
                else if (ucs4 == 0xffe1)        /* FULLWIDTH POUND SIGN */
                        ucs4 = 0x00a3;          /* POUND SIGN */
                else if (ucs4 == 0xffe2)        /* FULLWIDTH NOT SIGN */
                        ucs4 = 0x00ac;          /* NOT SIGN */

                PUTUCS2((unsigned short)ucs4, "E2BIG");

                /*
                 * One character successfully converted so update
                 * values outside of this function's stack.
                 */
                *inbuf = (char *)ip;
                *inbytesleft = ileft;
                *outbuf = op;
                *outbytesleft = oleft;
        }

ret:

#if     defined(DEBUG)
        if (rv == (size_t)-1) {
                fprintf(stderr, "DEBUG: errno=%d: %s\n", errno, debugmsg);
        }
#endif  /* DEBUG */

        /*
         * Return value for successful return is not defined by XPG
         * so return same as *inbytesleft as existing codes do.
         */
        return ((rv == (size_t)-1) ? rv : *inbytesleft);
}