boost: Readd and adjust libraries (#34)

* Add back variant. Turns out dynarmic needs this
* Explicitely add circular_buffer. We rely on this but it was removed previously
* Trim down url and iostreams libraries to what we need

boost/blank.hpp

@@ -0,0 +1,106 @@
+//-----------------------------------------------------------------------------
+// boost blank.hpp header file
+// See http://www.boost.org for updates, documentation, and revision history.
+//-----------------------------------------------------------------------------
+//
+// Copyright (c) 2003
+// Eric Friedman
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_BLANK_HPP
+#define BOOST_BLANK_HPP
+
+#include "boost/blank_fwd.hpp"
+
+#if !defined(BOOST_NO_IOSTREAM)
+#include <iosfwd> // for std::basic_ostream forward declare
+#include "boost/detail/templated_streams.hpp"
+#endif // BOOST_NO_IOSTREAM
+
+#include "boost/type_traits/integral_constant.hpp"
+#include "boost/type_traits/is_empty.hpp"
+#include "boost/type_traits/is_pod.hpp"
+#include "boost/type_traits/is_stateless.hpp"
+
+namespace boost {
+
+struct blank
+{
+};
+
+// type traits specializations
+//
+
+template <>
+struct is_pod< blank >
+    : boost::true_type
+{
+};
+
+template <>
+struct is_empty< blank >
+    : boost::true_type
+{
+};
+
+template <>
+struct is_stateless< blank >
+    : boost::true_type
+{
+};
+
+// relational operators
+//
+
+inline bool operator==(const blank&, const blank&)
+{
+    return true;
+}
+
+inline bool operator<=(const blank&, const blank&)
+{
+    return true;
+}
+
+inline bool operator>=(const blank&, const blank&)
+{
+    return true;
+}
+
+inline bool operator!=(const blank&, const blank&)
+{
+    return false;
+}
+
+inline bool operator<(const blank&, const blank&)
+{
+    return false;
+}
+
+inline bool operator>(const blank&, const blank&)
+{
+    return false;
+}
+
+// streaming support
+//
+#if !defined(BOOST_NO_IOSTREAM)
+
+BOOST_TEMPLATED_STREAM_TEMPLATE(E,T)
+inline BOOST_TEMPLATED_STREAM(ostream, E,T)& operator<<(
+      BOOST_TEMPLATED_STREAM(ostream, E,T)& out
+    , const blank&
+    )
+{
+    // (output nothing)
+    return out;
+}
+
+#endif // BOOST_NO_IOSTREAM
+
+} // namespace boost
+
+#endif // BOOST_BLANK_HPP

boost/blank_fwd.hpp

@@ -0,0 +1,22 @@
+//-----------------------------------------------------------------------------
+// boost blank_fwd.hpp header file
+// See http://www.boost.org for updates, documentation, and revision history.
+//-----------------------------------------------------------------------------
+//
+// Copyright (c) 2003
+// Eric Friedman
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_BLANK_FWD_HPP
+#define BOOST_BLANK_FWD_HPP
+
+namespace boost {
+
+struct blank;
+
+} // namespace boost
+
+#endif // BOOST_BLANK_FWD_HPP

boost/circular_buffer.hpp

@@ -0,0 +1,65 @@
+// Circular buffer library header file.
+
+// Copyright (c) 2003-2008 Jan Gaspar
+
+// Use, modification, and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+//  See www.boost.org/libs/circular_buffer for documentation.
+
+/*! @file
+Includes <boost/circular_buffer/base.hpp>
+*/
+
+#if !defined(BOOST_CIRCULAR_BUFFER_HPP)
+#define BOOST_CIRCULAR_BUFFER_HPP
+
+#if defined(_MSC_VER)
+    #pragma once
+#endif
+
+#include <boost/circular_buffer_fwd.hpp>
+#include <boost/config/workaround.hpp>
+#include <boost/static_assert.hpp>
+
+/*! Debug support control. */
+#if !defined(BOOST_CB_ENABLE_DEBUG)
+    #define BOOST_CB_ENABLE_DEBUG 0
+#endif
+
+/*! INTERNAL ONLY */
+#if BOOST_CB_ENABLE_DEBUG
+    #include <boost/assert.hpp>
+    #define BOOST_CB_ASSERT(Expr) BOOST_ASSERT(Expr)
+#else
+    #define BOOST_CB_ASSERT(Expr) ((void)0)
+#endif
+
+/*! INTERNAL ONLY */
+#if BOOST_WORKAROUND(BOOST_BORLANDC, <= 0x0550) || BOOST_WORKAROUND(__MWERKS__, <= 0x2407)
+    #define BOOST_CB_IS_CONVERTIBLE(Iterator, Type) ((void)0)
+#else
+    #include <iterator>
+    #include <boost/type_traits/is_convertible.hpp>
+    #define BOOST_CB_IS_CONVERTIBLE(Iterator, Type) \
+        BOOST_STATIC_ASSERT((is_convertible<typename std::iterator_traits<Iterator>::value_type, Type>::value))
+#endif
+
+/*! INTERNAL ONLY */
+#if defined(BOOST_NO_TEMPLATED_ITERATOR_CONSTRUCTORS)
+    #define BOOST_CB_ASSERT_TEMPLATED_ITERATOR_CONSTRUCTORS BOOST_STATIC_ASSERT(false);
+#else
+    #define BOOST_CB_ASSERT_TEMPLATED_ITERATOR_CONSTRUCTORS ((void)0);
+#endif
+
+#include <boost/circular_buffer/debug.hpp>
+#include <boost/circular_buffer/details.hpp>
+#include <boost/circular_buffer/base.hpp>
+#include <boost/circular_buffer/space_optimized.hpp>
+
+#undef BOOST_CB_ASSERT_TEMPLATED_ITERATOR_CONSTRUCTORS
+#undef BOOST_CB_IS_CONVERTIBLE
+#undef BOOST_CB_ASSERT
+
+#endif // #if !defined(BOOST_CIRCULAR_BUFFER_HPP)