Rewrite log file and log rotation behavior

modules/ripple_basics/utility/ripple_LogFile.cpp

@@ -0,0 +1,69 @@
+//------------------------------------------------------------------------------
+/*
+    Copyright (c) 2011-2013, OpenCoin, Inc.
+*/
+//==============================================================================
+
+LogFile::LogFile ()
+    : m_stream (nullptr)
+{
+}
+
+LogFile::~LogFile ()
+{
+}
+
+bool LogFile::isOpen () const noexcept
+{
+    return m_stream != nullptr;
+}
+
+bool LogFile::open (boost::filesystem::path const& path)
+{
+    close ();
+
+    bool wasOpened = false;
+
+    // VFALCO TODO Make this work with Unicode file paths
+    ScopedPointer <std::ofstream> stream (
+        new std::ofstream (path.c_str (), std::fstream::app));
+
+    if (stream->good ())
+    {
+        m_path = path;
+
+        m_stream = stream.release ();
+
+        wasOpened = true;
+    }
+
+    return wasOpened;
+}
+
+bool LogFile::closeAndReopen ()
+{
+    close ();
+
+    return open (m_path);
+}
+
+void LogFile::close ()
+{
+    m_stream = nullptr;
+}
+
+void LogFile::write (char const* text)
+{
+    if (m_stream != nullptr)
+        (*m_stream) << text;
+}
+
+void LogFile::writeln (char const* text)
+{
+    if (m_stream != nullptr)
+    {
+        (*m_stream) << text;
+        (*m_stream) << std::endl;
+    }
+}
+