#ifndef _RAR_DATAHASH_
 #define _RAR_DATAHASH_
 
 enum HASH_TYPE {HASH_NONE,HASH_RAR14,HASH_CRC32,HASH_BLAKE2};
 
 struct HashValue
 {
   void Init(HASH_TYPE Type);
   bool operator == (const HashValue &cmp);
   bool operator != (const HashValue &cmp) {return !(*this==cmp);}
 
   HASH_TYPE Type;
   union
   {
     uint CRC32;
     byte Digest[SHA256_DIGEST_SIZE];
   };
 };
 
 
 #ifdef RAR_SMP
 class ThreadPool;
 class DataHash;
 #endif
 
 
 class DataHash
 {
   private:
     HASH_TYPE HashType;
     uint CurCRC32;
     blake2sp_state *blake2ctx;
 
 #ifdef RAR_SMP
     ThreadPool *ThPool;
 
     uint MaxThreads;
     // Upper limit for maximum threads to prevent wasting threads in pool.
     static const uint MaxHashThreads=8;
 #endif
   public:
     DataHash();
     ~DataHash();
     void Init(HASH_TYPE Type,uint MaxThreads);
     void Update(const void *Data,size_t DataSize);
     void Result(HashValue *Result);
     uint GetCRC32();
     bool Cmp(HashValue *CmpValue,byte *Key);
     HASH_TYPE Type() {return HashType;}
 };
 
 #endif