add boost on mac

macx64/include/boost/beast/websocket/detail/pmd_extension.hpp

@@ -0,0 +1,125 @@
+//
+// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
+//
+// 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)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_WEBSOCKET_DETAIL_PMD_EXTENSION_HPP
+#define BOOST_BEAST_WEBSOCKET_DETAIL_PMD_EXTENSION_HPP
+
+#include <boost/beast/core/error.hpp>
+#include <boost/beast/websocket/option.hpp>
+#include <boost/beast/http/rfc7230.hpp>
+#include <utility>
+#include <type_traits>
+
+namespace boost {
+namespace beast {
+namespace websocket {
+namespace detail {
+
+// permessage-deflate offer parameters
+//
+// "context takeover" means:
+// preserve sliding window across messages
+//
+struct pmd_offer
+{
+    bool accept;
+
+    // 0 = absent, or 8..15
+    int server_max_window_bits;
+
+    // -1 = present, 0 = absent, or 8..15
+    int client_max_window_bits;
+
+    // `true` if server_no_context_takeover offered
+    bool server_no_context_takeover;
+
+    // `true` if client_no_context_takeover offered
+    bool client_no_context_takeover;
+};
+
+BOOST_BEAST_DECL
+int
+parse_bits(string_view s);
+
+BOOST_BEAST_DECL
+void
+pmd_read_impl(pmd_offer& offer, http::ext_list const& list);
+
+BOOST_BEAST_DECL
+static_string<512>
+pmd_write_impl(pmd_offer const& offer);
+
+BOOST_BEAST_DECL
+static_string<512>
+pmd_negotiate_impl(
+    pmd_offer& config,
+    pmd_offer const& offer,
+    permessage_deflate const& o);
+
+// Parse permessage-deflate request fields
+//
+template<class Allocator>
+void
+pmd_read(pmd_offer& offer,
+    http::basic_fields<Allocator> const& fields)
+{
+    http::ext_list list{
+        fields["Sec-WebSocket-Extensions"]};
+    detail::pmd_read_impl(offer, list);
+}
+
+// Set permessage-deflate fields for a client offer
+//
+template<class Allocator>
+void
+pmd_write(http::basic_fields<Allocator>& fields,
+    pmd_offer const& offer)
+{
+    auto s = detail::pmd_write_impl(offer);
+    fields.set(http::field::sec_websocket_extensions, s);
+}
+
+// Negotiate a permessage-deflate client offer
+//
+template<class Allocator>
+void
+pmd_negotiate(
+    http::basic_fields<Allocator>& fields,
+    pmd_offer& config,
+    pmd_offer const& offer,
+    permessage_deflate const& o)
+{
+    if(! (offer.accept && o.server_enable))
+    {
+        config.accept = false;
+        return;
+    }
+    config.accept = true;
+
+    auto s = detail::pmd_negotiate_impl(config, offer, o);
+    if(config.accept)
+        fields.set(http::field::sec_websocket_extensions, s);
+}
+
+// Normalize the server's response
+//
+BOOST_BEAST_DECL
+void
+pmd_normalize(pmd_offer& offer);
+
+} // detail
+} // websocket
+} // beast
+} // boost
+
+#if BOOST_BEAST_HEADER_ONLY
+#include <boost/beast/websocket/detail/pmd_extension.ipp>
+#endif
+
+#endif