Move swarmHash to its own file.

4 files changed, 100 insertions, 44 deletions

diff --git a/libdevcore/SHA3.cpp b/libdevcore/SHA3.cpp
index 96c7b764..3b12f39f 100644
--- a/libdevcore/SHA3.cpp
+++ b/libdevcore/SHA3.cpp
@@ -238,47 +238,4 @@ bool keccak256(bytesConstRef _input, bytesRef o_output)
 	return true;
 }
 
-bytes toLittleEndian(size_t _size)
-{
-	bytes encoded(8);
-	for (size_t i = 0; i < 8; ++i)
-		encoded[i] = (_size >> (8 * i)) & 0xff;
-	return encoded;
-}
-
-h256 swarmHashSimple(bytesConstRef _data, size_t _size)
-{
-	return keccak256(toLittleEndian(_size) + _data.toBytes());
-}
-
-h256 swarmHash(bytes const& _input)
-{
-	bytes data = _input;
-	size_t lastChunkSize = 0;
-	size_t level = 0;
-	do
-	{
-		bytes innerNodes;
-		size_t i = 0;
-		do
-		{
-			size_t bytes = std::min<size_t>(0x1000, data.size() - i);
-			size_t size = bytes << (7 * level);
-			if (i + 0x1000 >= data.size())
-			{
-				// last node
-				size = level == 0 ? bytes : ((bytes - 32) << (7 * level)) + lastChunkSize;
-				lastChunkSize = size;
-			}
-			innerNodes += swarmHashSimple(bytesConstRef(_input.data() + i, bytes), size).asBytes();
-			i += 0x1000;
-		}
-		while (i < data.size());
-		data = std::move(innerNodes);
-		level++;
-	}
-	while (data.size() > 32);
-	return h256(data);
-}
-
 }
diff --git a/libdevcore/SHA3.h b/libdevcore/SHA3.h
index ea0c761d..c481bfc9 100644
--- a/libdevcore/SHA3.h
+++ b/libdevcore/SHA3.h
@@ -53,5 +53,4 @@ inline std::string keccak256(std::string const& _input, bool _isNibbles) { retur
 /// Calculate SHA3-256 MAC
 inline void keccak256mac(bytesConstRef _secret, bytesConstRef _plain, bytesRef _output) { keccak256(_secret.toBytes() + _plain.toBytes()).ref().populate(_output); }
 
-h256 swarmHash(bytes const& _data);
 }
diff --git a/libdevcore/SwarmHash.cpp b/libdevcore/SwarmHash.cpp
new file mode 100644
index 00000000..583d84b1
--- /dev/null
+++ b/libdevcore/SwarmHash.cpp
@@ -0,0 +1,69 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file SwarmHash.cpp
+ */
+
+#include <libdevcore/SwarmHash.h>
+
+#include <libdevcore/SHA3.h>
+
+using namespace std;
+using namespace dev;
+
+
+bytes toLittleEndian(size_t _size)
+{
+	bytes encoded(8);
+	for (size_t i = 0; i < 8; ++i)
+		encoded[i] = (_size >> (8 * i)) & 0xff;
+	return encoded;
+}
+
+h256 swarmHashSimple(bytesConstRef _data, size_t _size)
+{
+	return keccak256(toLittleEndian(_size) + _data.toBytes());
+}
+
+h256 dev::swarmHash(bytes const& _input)
+{
+	bytes data = _input;
+	size_t lastChunkSize = 0;
+	size_t level = 0;
+	do
+	{
+		bytes innerNodes;
+		size_t i = 0;
+		do
+		{
+			size_t bytes = std::min<size_t>(0x1000, data.size() - i);
+			size_t size = bytes << (7 * level);
+			if (i + 0x1000 >= data.size())
+			{
+				// last node
+				size = level == 0 ? bytes : ((bytes - 32) << (7 * level)) + lastChunkSize;
+				lastChunkSize = size;
+			}
+			innerNodes += swarmHashSimple(bytesConstRef(_input.data() + i, bytes), size).asBytes();
+			i += 0x1000;
+		}
+		while (i < data.size());
+		data = std::move(innerNodes);
+		level++;
+	}
+	while (data.size() > 32);
+	return h256(data);
+}
diff --git a/libdevcore/SwarmHash.h b/libdevcore/SwarmHash.h
new file mode 100644
index 00000000..925509ab
--- /dev/null
+++ b/libdevcore/SwarmHash.h
@@ -0,0 +1,31 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file SwarmHash.h
+ */
+
+#pragma once
+
+#include <libdevcore/FixedHash.h>
+#include <libdevcore/Common.h>
+
+namespace dev
+{
+
+/// Compute the "swarm hash" of @a _data
+h256 swarmHash(bytes const& _data);
+
+}