/*
 * 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 usr/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 usr/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 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1986 AT&T */
/*        All Rights Reserved   */

#include "lint.h"
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <widec.h>
#include <string.h>
#include <limits.h>

/*
 *      wsprintf -- this function will output a wchar_t string
 *                  according to the conversion format.
 *                  Note that the maximum length of the output
 *                  string is 1024 bytes.
 */

/*VARARGS2*/
int
wsprintf(wchar_t *wstring, const char *format, ...)
{
        va_list ap;
        char    tempstring[1024];
        char *p2;
        size_t len;
        int malloced = 0;
        char *p1 = (char *)wstring;
        int retcode;
        int     i;

        va_start(ap, format);
        if (vsprintf(p1, format, ap) == -1) {
                va_end(ap);
                return (-1);
        }
        va_end(ap);
        len = strlen(p1) + 1;
        if (len > 1024) {
                p2 = malloc(len);
                if (p2 == NULL)
                        return (-1);
                malloced = 1;
        } else
                p2 = tempstring;
        (void) strcpy(p2, p1);

        if (mbstowcs(wstring, p2, len) == (size_t)-1) {
                for (i = 0; i < len; i++) {
                        if ((retcode = mbtowc(wstring, p2, MB_CUR_MAX)) == -1) {
                                *wstring = (wchar_t)*p2 & 0xff;
                                p2++;
                        } else {
                                p2 += retcode;
                        }
                        if (*wstring++ == (wchar_t)0) {
                                break;
                        }
                }
        }

        if (malloced == 1)
                free(p2);
        len = wcslen(wstring);
        if (len <= INT_MAX)
                return ((int)len);
        else
                return (EOF);
}