text: 
  #ifndef mem_h
  #define mem_h
  
  #include <stdlib.h>
  #include "mydef.h"
  
  #define debug_malloc(x, y, z) malloc(x)
  #define my_malloc malloc
  #define my_free free
  #define mem_bytes() 0
  #define mem_stats(x) ((void) (0))
  #define my_tell(x) ((void) (0))
  #define check_memory(x) ((void) (0))
  
  
  #define heap_alloc(x, nb) (typeof(*x)*) my_malloc(sizeof(*x) + nb)
  #define heap_free my_free
  
  #endif
  