add boost on mac

macx64/include/boost/gil/io/make_backend.hpp

@@ -0,0 +1,124 @@
+//
+//
+// Copyright 2012 Christian Henning
+//
+// 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_GIL_IO_MAKE_BACKEND_HPP
+#define BOOST_GIL_IO_MAKE_BACKEND_HPP
+
+#include <boost/gil/io/get_reader.hpp>
+
+#include <boost/mpl/and.hpp>
+
+#include <type_traits>
+
+namespace boost { namespace gil {
+
+template <typename String, typename FormatTag>
+inline
+auto make_reader_backend(
+    String const& file_name, image_read_settings<FormatTag> const& settings,
+    typename std::enable_if
+    <
+        mpl::and_
+        <
+            detail::is_supported_path_spec<String>,
+            is_format_tag<FormatTag>
+        >::value
+    >::type* /*dummy*/ = nullptr)
+    -> typename get_reader_backend<String, FormatTag>::type
+{
+    using device_t = typename get_read_device<String, FormatTag>::type;
+
+    device_t device(
+        detail::convert_to_native_string(file_name),
+        typename detail::file_stream_device<FormatTag>::read_tag());
+
+    return reader_backend<device_t, FormatTag>(device, settings);
+}
+
+template <typename FormatTag>
+inline
+auto make_reader_backend(
+    std::wstring const& file_name, image_read_settings<FormatTag> const& settings)
+    -> typename get_reader_backend<std::wstring, FormatTag>::type
+{
+    char const* str = detail::convert_to_native_string(file_name);
+
+    using device_t = typename get_read_device<std::wstring, FormatTag>::type;
+    device_t device(str, typename detail::file_stream_device<FormatTag>::read_tag());
+
+    delete[] str;  // TODO: RAII
+
+    return reader_backend<device_t, FormatTag>(device, settings);
+}
+
+#ifdef BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
+template <typename FormatTag>
+inline
+auto make_reader_backend(
+    filesystem::path const& path,
+    image_read_settings<FormatTag> const& settings)
+    -> typename get_reader_backend<std::wstring, FormatTag>::type
+{
+    return make_reader_backend(path.wstring(), settings);
+}
+#endif  // BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
+
+template <typename Device, typename FormatTag>
+inline
+auto make_reader_backend(Device& io_dev, image_read_settings<FormatTag> const& settings,
+    typename std::enable_if
+    <
+        mpl::and_
+        <
+            detail::is_adaptable_input_device<FormatTag, Device>,
+            is_format_tag<FormatTag>
+        >::value
+    >::type* /*dummy*/ = nullptr)
+    -> typename get_reader_backend<Device, FormatTag>::type
+{
+    using device_t = typename get_read_device<Device, FormatTag>::type;
+    device_t device(io_dev);
+
+    return reader_backend<device_t, FormatTag>(device, settings);
+}
+
+template <typename String, typename FormatTag>
+inline
+auto make_reader_backend(String const& file_name, FormatTag const&,
+    typename std::enable_if
+    <
+        mpl::and_
+        <
+            detail::is_supported_path_spec<String>,
+            is_format_tag<FormatTag>
+        >::value
+    >::type* /*dummy*/ = nullptr)
+    -> typename get_reader_backend<String, FormatTag>::type
+{
+    return make_reader_backend(file_name, image_read_settings<FormatTag>());
+}
+
+template <typename Device, typename FormatTag>
+inline
+auto make_reader_backend(Device& io_dev, FormatTag const&,
+    typename std::enable_if
+    <
+        mpl::and_
+        <
+            detail::is_adaptable_input_device<FormatTag, Device>,
+            is_format_tag<FormatTag>
+        >::value
+    >::type* /*dummy*/ = nullptr)
+    -> typename get_reader_backend<Device, FormatTag>::type
+{
+    return make_reader_backend(io_dev, image_read_settings<FormatTag>());
+}
+
+}} // namespace boost::gil
+
+#endif