Function lpFirst

src/listpack.c:479–484

Return a pointer to the first element of the listpack, or NULL if the * listpack has no elements. */

/* Return a pointer to the first element of the listpack, or NULL if the
 * listpack has no elements. */
unsigned char *lpFirst(unsigned char *lp) {
    unsigned char *p = lp + LP_HDR_SIZE; /* Skip the header. */
    if (p[0] == LP_EOF) return NULL;
    lpAssertValidEntry(lp, lpBytes(lp), p);
    return p;
}

/* Return a pointer to the last element of the listpack, or NULL if the
 * listpack has no elements. */