Initial community commit

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

@@ -0,0 +1,52 @@
+#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