text: #ifndef crypto_hash_sha512_H
  #define crypto_hash_sha512_H
  
  #define crypto_hash_sha512_ref_BYTES 64
  #ifdef __cplusplus
  #include <string>
  extern std::string crypto_hash_sha512_ref(const std::string &);
  extern "C" {
  #endif
  extern int crypto_hash_sha512_ref(unsigned char *,const unsigned char *,unsigned long long);
  #ifdef __cplusplus
  }
  #endif
  
  #define crypto_hash_sha512 crypto_hash_sha512_ref
  #define crypto_hash_sha512_BYTES crypto_hash_sha512_ref_BYTES
  #define crypto_hash_sha512_IMPLEMENTATION "crypto_hash/sha512/ref"
  #ifndef crypto_hash_sha512_ref_VERSION
  #define crypto_hash_sha512_ref_VERSION "-"
  #endif
  #define crypto_hash_sha512_VERSION crypto_hash_sha512_ref_VERSION
  
  #endif
  