mbsncat.c

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/*
 * COPYRIGHT:   See COPYING in the top level directory
 * PROJECT:     ReactOS system libraries
 * FILE:        lib/msvcrt/mbstring/mbsncat.c
 * PURPOSE:     Concatenate two multi byte string to maximum of n characters or bytes
 * PROGRAMER:   Ariadne
 * UPDATE HISTORY:
 *              12/04/99: Created
 */

#include <precomp.h>
#include <mbstring.h>
#include <string.h>

size_t _mbclen2(const unsigned int s);
unsigned char *_mbset (unsigned char *string, int c);

/*
 * @implemented
 */
unsigned char *_mbsncat (unsigned char *dst, const unsigned char *src, size_t n)
{
    int c;
    unsigned char *save = dst;

    while ((c = _mbsnextc (dst)))
    dst = _mbsinc (dst);

    while (n-- > 0 && (c = _mbsnextc (src))) {

    _mbset (dst, c);

    dst = _mbsinc (dst);

    src = _mbsinc ((unsigned char *) src);

    }

    *dst = '\0';

    return save;
}

/*
 * @implemented
 */
unsigned char * _mbsnbcat(unsigned char *dst, const unsigned char *src, size_t n)
{
    unsigned char *d;
    const unsigned char *s = src;
    if (n != 0) {
        d = dst + _mbslen(dst); // get the end of string
        d += _mbclen2(*d); // move 1 or 2 up

        do {
            if ((*d++ = *s++) == 0)
            {
                while (--n != 0)
                    *d++ = 0;
                break;
            }
            if ( !(n==1 && _ismbblead(*s)) )
                n--;
        } while (n > 0);
    }
    return dst;
}