1 files changed, 90 insertions, 0 deletions
diff --git a/libdevcore/CommonIO.cpp b/libdevcore/CommonIO.cpp
new file mode 100644
index 00000000..60ac518d
--- /dev/null
+++ b/libdevcore/CommonIO.cpp
@@ -0,0 +1,90 @@
+/*
+	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 CommonIO.cpp
+ * @author Gav Wood <i@gavwood.com>
+ * @date 2014
+ */
+
+#include "CommonIO.h"
+#include <iostream>
+#include <cstdlib>
+#include <fstream>
+#include <stdio.h>
+#if defined(_WIN32)
+#include <windows.h>
+#else
+#include <termios.h>
+#endif
+#include <boost/filesystem.hpp>
+#include "Exceptions.h"
+using namespace std;
+using namespace dev;
+
+
+template <typename _T>
+inline _T contentsGeneric(std::string const& _file)
+{
+	_T ret;
+	size_t const c_elementSize = sizeof(typename _T::value_type);
+	std::ifstream is(_file, std::ifstream::binary);
+	if (!is)
+		return ret;
+
+	// get length of file:
+	is.seekg(0, is.end);
+	streamoff length = is.tellg();
+	if (length == 0)
+		return ret; // do not read empty file (MSVC does not like it)
+	is.seekg(0, is.beg);
+
+	ret.resize((length + c_elementSize - 1) / c_elementSize);
+	is.read(const_cast<char*>(reinterpret_cast<char const*>(ret.data())), length);
+	return ret;
+}
+
+string dev::contentsString(string const& _file)
+{
+	return contentsGeneric<string>(_file);
+}
+
+void dev::writeFile(std::string const& _file, bytesConstRef _data, bool _writeDeleteRename)
+{
+	namespace fs = boost::filesystem;
+	if (_writeDeleteRename)
+	{
+		fs::path tempPath = fs::unique_path(_file + "-%%%%%%");
+		writeFile(tempPath.string(), _data, false);
+		// will delete _file if it exists
+		fs::rename(tempPath, _file);
+	}
+	else
+	{
+		// create directory if not existent
+		fs::path p(_file);
+		if (!fs::exists(p.parent_path()))
+		{
+			fs::create_directories(p.parent_path());
+			DEV_IGNORE_EXCEPTIONS(fs::permissions(p.parent_path(), fs::owner_all));
+		}
+
+		ofstream s(_file, ios::trunc | ios::binary);
+		s.write(reinterpret_cast<char const*>(_data.data()), _data.size());
+		if (!s)
+			BOOST_THROW_EXCEPTION(FileError() << errinfo_comment("Could not write to file: " + _file));
+		DEV_IGNORE_EXCEPTIONS(fs::permissions(_file, fs::owner_read|fs::owner_write));
+	}
+}