#include "strlib.h"

/*
 *  * Appends src to string dst of size siz (unlike strncat, siz is the
 *   * full size of dst, not space left).  At most siz-1 characters
 *    * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
 *     * Returns strlen(src) + MIN(siz, strlen(initial dst)).
 *      * If retval >= siz, truncation occurred.
 *       */
size_t
strlcat(dst, src, siz)
char *dst;
const char *src;
size_t siz;
{
  register char *d = dst;
  register const char *s = src;
  register size_t n = siz;
  size_t dlen;
  
  /* Find the end of dst and adjust bytes left but don't go past end */
  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));       /* count does not include NUL */
}