From d195f76a25a90bb88d2c2bdf4a9649937751cb41 Mon Sep 17 00:00:00 2001
From: Eric Lombrozo <elombrozo@gmail.com>
Date: Thu, 6 Feb 2014 13:45:57 -0800
Subject: [PATCH] Added windows and os x support for the datadir.

---
 eth/main.cpp               |  3 ++-
 libethereum/BlockChain.cpp |  3 ++-
 libethereum/FileSystem.cpp | 55 ++++++++++++++++++++++++++++++++++++++
 libethereum/FileSystem.h   | 26 ++++++++++++++++++
 4 files changed, 85 insertions(+), 2 deletions(-)
 create mode 100644 libethereum/FileSystem.cpp
 create mode 100644 libethereum/FileSystem.h

diff --git a/eth/main.cpp b/eth/main.cpp
index 3d87c9732..d710813d0 100644
--- a/eth/main.cpp
+++ b/eth/main.cpp
@@ -25,6 +25,7 @@
 #include "PeerNetwork.h"
 #include "BlockChain.h"
 #include "State.h"
+#include "FileSystem.h"
 using namespace std;
 using namespace eth;
 
@@ -76,7 +77,7 @@ int main(int argc, char** argv)
 	KeyPair us = KeyPair::create();
 	Address coinbase = us.address();
 
-	string configFile = string(getenv("HOME")) + "/.ethereum/config.rlp";
+	string configFile = getDataDir() + "/config.rlp";
 	bytes b = contents(configFile);
 	if (b.size())
 	{
diff --git a/libethereum/BlockChain.cpp b/libethereum/BlockChain.cpp
index 2566d33f1..966abd9c6 100644
--- a/libethereum/BlockChain.cpp
+++ b/libethereum/BlockChain.cpp
@@ -27,10 +27,11 @@
 #include "BlockInfo.h"
 #include "State.h"
 #include "BlockChain.h"
+#include "FileSystem.h"
 using namespace std;
 using namespace eth;
 
-std::string Defaults::s_dbPath = string(getenv("HOME")) + "/.ethereum";
+std::string Defaults::s_dbPath = getDataDir(); 
 
 namespace eth
 {
diff --git a/libethereum/FileSystem.cpp b/libethereum/FileSystem.cpp
new file mode 100644
index 000000000..65ab0e485
--- /dev/null
+++ b/libethereum/FileSystem.cpp
@@ -0,0 +1,55 @@
+/*
+        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.
+
+        Foobar 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 Foobar.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file FileSystem.cpp
+ * @author Eric Lombrozo <elombrozo@gmail.com>
+ * @date 2014
+ */
+
+#include "FileSystem.h"
+#include <boost/filesystem.hpp>
+
+#ifdef _WIN32
+#include <shlobj.h>
+#endif
+
+std::string getDataDir()
+{
+#ifdef _WIN32
+	char path[1024] = "";
+	if (SHGetSpecialFolderPathA(NULL, path, CSIDL_APPDATA, true))
+		return (boost::filesystem::path(path) / "Ethereum").string();
+	else
+        {
+		std::cerr << "getDataDir() - SHGetSpecialFolderPathA() failed." << std::endl;
+		throw std::runtime_error("getDataDir() - SHGetSpecialFolderPathA() failed.");
+	}
+#else
+	boost::filesystem::path dataDirPath;
+	char* homeDir = getenv("HOME");
+	if (homeDir == NULL || strlen(homeDir) == 0)
+		dataDirPath = boost::filesystem::path("/");
+	else
+		dataDirPath = boost::filesystem::path(homeDir);
+#if defined(__APPLE__) && defined(__MACH__)
+	dataDirPath /= "Library/Application Support";
+	boost::filesystem::create_directory(dataDirPath);
+        return (dataDirPath / "Ethereum").string();
+#else
+	return (dataDirPath / ".ethereum").string();
+#endif
+#endif
+}
diff --git a/libethereum/FileSystem.h b/libethereum/FileSystem.h
new file mode 100644
index 000000000..f5d0cc747
--- /dev/null
+++ b/libethereum/FileSystem.h
@@ -0,0 +1,26 @@
+/*
+        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.
+
+        Foobar 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 Foobar.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file FileSystem.h
+ * @author Eric Lombrozo <elombrozo@gmail.com>
+ * @date 2014
+ */
+
+#pragma once
+
+#include <string>
+
+std::string getDataDir();