winamp/Src/external_dependencies/openmpt-trunk/include/unrar/hash.hpp

53 lines
999 B
C++

#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