mem_copyclear.c

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/* LSET for non-strings */

#include "fb.h"

FBCALL void fb_MemCopyClear
        (
                unsigned char *dst,
                ssize_t dstlen,
                unsigned char *src,
                ssize_t srclen
        )
{
        ssize_t bytes;

        if( (dst == NULL) || (src == NULL) || (dstlen <= 0) || (srclen <= 0) )
                return;

        bytes = (dstlen <= srclen? dstlen: srclen);
        
        /* move */
        memcpy( dst, src, bytes );

        /* clear remainder */
        dstlen -= bytes;
        if( dstlen > 0 )
                memset( &dst[bytes], 0, dstlen );
}