Function test_eof

extlibs/lua/src/liolib.c:497–502

static int test_eof (lua_State *L, FILE *f) {
  int c = getc(f);
  ungetc(c, f);  /* no-op when c == EOF */
  lua_pushliteral(L, "");
  return (c != EOF);
}


static int read_line (lua_State *L, FILE *f, int chop) {