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

size_t strlcat(char *dst, const char *src, size_t siz)
{
  char *d = dst;
  const char *s = src;
  size_t n = siz;
  size_t dlen;

  while(n-- != 0 && *d != '\0')
    d++;
  dlen = d - dst;
  n = siz - dlen;

  if(n == 0)
    return(dlen + strlen(s));
  while(*s != '\0') {
    if(n != 1) {
      *d++ = *s;
      n--;
    }
    s++;
  }
  *d = '\0';

  return(dlen + (s - src));
}