patch 8.1.0020: cannot tell whether a register is executing or recording commit https://github.com/vim/vim/commit/0b6d911e5de1a1c10a23d4c2ee1b0275c474a2dd Author: Bram Moolenaar <Bram@vim.org> Date: Tue May 22 20:35:17 2018 +0200 patch 8.1.0020: cannot tell whether a register is executing or recording Problem: Cannot tell whether a register is being used for executing or recording. Solution: Add reg_executing() and reg_recording(). (Hirohito Higashi, closes #2745) Rename the global variables for consistency. Store the register name in reg_executing.

/*
 * Cleaned-up version of the maze program.
 * Doesn't look as nice, but should work with all C compilers.
 * Sascha Wilde, October 2003
 */
#include <stdio.h>
#include <stdlib.h>

char *M, A, Z, E = 40, line[80], T[3];
int
main (C)
{
  for (M = line + E, *line = A = scanf ("%d", &C); --E; line[E] = M[E] = E)
    printf ("._");
  for (; (A -= Z = !Z) || (printf ("\n|"), A = 39, C--); Z || printf (T))
    T[Z] = Z[A - (E = A[line - Z]) && !C
	     & A == M[A]
	     | RAND_MAX/3 < rand ()
	     || !C & !Z ? line[M[E] = M[A]] = E, line[M[A] = A - Z] =
	     A, "_." : " |"];
  return 0;
}