text: 
  #ifndef randombytes_H
  #define randombytes_H
  
  #include <stddef.h>
  #include <stdint.h>
  
  #include <sys/types.h>
  
  #include "export.h"
  
  #ifdef __cplusplus
  # ifdef __GNUC__
  #  pragma GCC diagnostic ignored "-Wlong-long"
  # endif
  extern "C" {
  #endif
  
  typedef struct randombytes_implementation {
      const char *(*implementation_name)(void); /* required */
      uint32_t    (*random)(void);              /* required */
      void        (*stir)(void);                /* optional */
      uint32_t    (*uniform)(const uint32_t upper_bound); /* optional, a default implementation will be used if NULL */
      void        (*buf)(void * const buf, const size_t size); /* required */
      int         (*close)(void);               /* optional */
  } randombytes_implementation;
  
  #define randombytes_BYTES_MAX SODIUM_MIN(SODIUM_SIZE_MAX, 0xffffffffUL)
  
  #define randombytes_SEEDBYTES 32U
  SODIUM_EXPORT
  size_t randombytes_seedbytes(void);
  
  SODIUM_EXPORT
  void randombytes_buf(void * const buf, const size_t size);
  
  SODIUM_EXPORT
  void randombytes_buf_deterministic(void * const buf, const size_t size,
                                     const unsigned char seed[randombytes_SEEDBYTES]);
  
  SODIUM_EXPORT
  uint32_t randombytes_random(void);
  
  SODIUM_EXPORT
  uint32_t randombytes_uniform(const uint32_t upper_bound);
  
  SODIUM_EXPORT
  void randombytes_stir(void);
  
  SODIUM_EXPORT
  int randombytes_close(void);
  
  SODIUM_EXPORT
  int randombytes_set_implementation(randombytes_implementation *impl);
  
  SODIUM_EXPORT
  const char *randombytes_implementation_name(void);
  
  /* -- NaCl compatibility interface -- */
  
  SODIUM_EXPORT
  void randombytes(unsigned char * const buf, const unsigned long long buf_len);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif
  