text: #ifndef __DISRUPTOR_UTIL_H__
  #define __DISRUPTOR_UTIL_H__
  
  #include <stdint.h>
  #include <stddef.h>
  #include <stdarg.h>
  
  /* bool. */
  #ifndef bool
  # define bool   int
  # define true   1
  # define false  0
  #endif
  
  /* NULL. */
  #ifndef NULL
  # define NULL   0
  #endif
  
  /* string utilities. */
  void strfree( char* str );
  char* strclone( const char* str );
  char* strformat( const char* fmt, ... );
  char* vstrformat( const char* fmt, va_list ap );
  
  #endif
  