/************************************************************************
*                                                                       *    
*  Copyright Digital Equipment Corporation 1998. All rights reserved.   *
*                                                                       *    
*  Restricted Rights: Use, duplication, or disclosure by the U.S.       *    
*  Government is subject to restrictions as set forth in subparagraph   *    
*  (c) (1) (ii) of DFARS 252.227-7013, or in FAR 52.227-19, or in FAR   *    
*  52.227-14 Alt. III, as applicable.                                   *    
*                                                                       *    
*  This software is proprietary to and embodies the confidential        *    
*  technology of Digital Equipment Corporation. Possession, use, or     *    
*  copying of this software and media is authorized only pursuant to a  *    
*  valid written license from Digital or an authorized sublicensor.     *    
*                                                                       *    
************************************************************************/

/*      wcsncat_example.c       */

#include <stdlib.h>
#include <stdio.h>
#include <wchar.h>
#include <string.h>

/* This program concatenates two wide-character strings using   */
/* the wcsncat function, and then manually compares the result  */
/* to the expected result                                       */

#define S1LENGTH 10
#define S2LENGTH 8
#define SIZE     3

main()
{
    int i;
    wchar_t s1buf[S1LENGTH + S2LENGTH];
    wchar_t s2buf[S2LENGTH];
    wchar_t test1[S1LENGTH + S2LENGTH];

    /* Initialize the three wide-character strings */

    if (mbstowcs(s1buf, "abcmnexyz", S1LENGTH) == -1) {
        perror("mbstowcs");
        exit(EXIT_FAILURE);
    }

    if (mbstowcs(s2buf, " orthis", S2LENGTH) == -1) {
        perror("mbstowcs");
        exit(EXIT_FAILURE);
    }

    if (mbstowcs(test1, "abcmnexyz orthis", S1LENGTH + SIZE) == -1) {
        perror("mbstowcs");
        exit(EXIT_FAILURE);
    }

    /* Concatenate s1buf with SIZE characters from s2buf, placing the */
    /* result into s1buf. Then compare s1buf with the expected result */
    /* in test1.                                                      */

    wcsncat(s1buf, s2buf, SIZE);

    for (i = 0; i <= S1LENGTH + SIZE - 2; i++) {
        /* Check that each character is correct */
        if (test1[i] != s1buf[i]) {
            printf("Error in wcsncat\n");
            exit(EXIT_FAILURE);
        }
    }

    printf("Concatenated string: <%S>\n", s1buf);
}