Core: Reworked hashes

-Removed HashDigest class (replaced by ByteArray)
-Removed Hashable/Hash classes (replaced by ComputeHash function and
Hashable template struct)
-Fixed ByteArray operator<<
-Renamed File::GetHash to File::ComputeHash


Former-commit-id: cc5eaf2d4c88a556878190b8205e66713512e2d2

src/Nazara/Core/AbstractHash.cpp

@@ -3,9 +3,57 @@
 // For conditions of distribution and use, see copyright notice in Config.hpp
 
 #include <Nazara/Core/AbstractHash.hpp>
+#include <Nazara/Core/Error.hpp>
+#include <Nazara/Core/Hash/CRC32.hpp>
+#include <Nazara/Core/Hash/Fletcher16.hpp>
+#include <Nazara/Core/Hash/MD5.hpp>
+#include <Nazara/Core/Hash/SHA1.hpp>
+#include <Nazara/Core/Hash/SHA224.hpp>
+#include <Nazara/Core/Hash/SHA256.hpp>
+#include <Nazara/Core/Hash/SHA384.hpp>
+#include <Nazara/Core/Hash/SHA512.hpp>
+#include <Nazara/Core/Hash/Whirlpool.hpp>
 #include <Nazara/Core/Debug.hpp>
 
 namespace Nz
 {
 	AbstractHash::~AbstractHash() = default;
+
+	std::unique_ptr<AbstractHash> AbstractHash::Get(HashType type)
+	{
+		NazaraAssert(type <= HashType_Max, "Hash type value out of enum");
+
+		switch (type)
+		{
+			case HashType_Fletcher16:
+				return std::unique_ptr<AbstractHash>(new HashFletcher16);
+
+			case HashType_CRC32:
+				return std::unique_ptr<AbstractHash>(new HashCRC32);
+
+			case HashType_MD5:
+				return std::unique_ptr<AbstractHash>(new HashMD5);
+
+			case HashType_SHA1:
+				return std::unique_ptr<AbstractHash>(new HashSHA1);
+
+			case HashType_SHA224:
+				return std::unique_ptr<AbstractHash>(new HashSHA224);
+
+			case HashType_SHA256:
+				return std::unique_ptr<AbstractHash>(new HashSHA256);
+
+			case HashType_SHA384:
+				return std::unique_ptr<AbstractHash>(new HashSHA384);
+
+			case HashType_SHA512:
+				return std::unique_ptr<AbstractHash>(new HashSHA512);
+
+			case HashType_Whirlpool:
+				return std::unique_ptr<AbstractHash>(new HashWhirlpool);
+		}
+
+		NazaraInternalError("Hash type not handled (0x" + String::Number(type, 16) + ')');
+		return std::unique_ptr<AbstractHash>();
+	}
 }