Function nextc

3rd/lua-5.4.3/src/liolib.c:438–448

** Add current char to buffer (if not out of space) and read next one */

** Add current char to buffer (if not out of space) and read next one
*/
static int nextc (RN *rn) {
  if (l_unlikely(rn->n >= L_MAXLENNUM)) {  /* buffer overflow? */
    rn->buff[0] = '\0';  /* invalidate result */
    return 0;  /* fail */
  }
  else {
    rn->buff[rn->n++] = rn->c;  /* save current char */
    rn->c = l_getc(rn->f);  /* read next one */
    return 1;
  }
}


/*