From c8b942918517fdeefd9886bfbae1d00ec62d47b0 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sat, 17 Dec 2016 22:32:34 -0500
Subject: Add C++ bindings

---
 lv2/lv2plug.in/ns/lv2core/Feature.hpp | 74 +++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 lv2/lv2plug.in/ns/lv2core/Feature.hpp

(limited to 'lv2/lv2plug.in/ns/lv2core/Feature.hpp')

diff --git a/lv2/lv2plug.in/ns/lv2core/Feature.hpp b/lv2/lv2plug.in/ns/lv2core/Feature.hpp
new file mode 100644
index 0000000..81be218
--- /dev/null
+++ b/lv2/lv2plug.in/ns/lv2core/Feature.hpp
@@ -0,0 +1,74 @@
+/*
+  Copyright 2015 David Robillard <http://drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef LV2_FEATURE_HPP
+#define LV2_FEATURE_HPP
+
+#include <string.h>
+
+#include "lv2/lv2plug.in/ns/lv2core/lv2.h"
+#include "lv2/lv2plug.in/ns/ext/urid/urid.h"
+
+namespace lv2 {
+
+/**
+   Feature.
+
+   Features allow hosts to make additional functionality available to plugins
+   without requiring modification to the LV2 API.  Extensions may define new
+   features and specify the `URI` and `data` to be used if necessary.
+   Some features, such as lv2:isLive, do not require the host to pass data.
+*/
+template<typename Data, bool Required>
+class Feature
+{
+public:
+	/**
+	   Initialize feature by retrieving data from the host.
+
+	   @param features Feature array passed by the host.
+	   @param uri URI of this feature.
+	   @param valid Set to false iff feature is required but unsupported.
+	*/
+	Feature(const LV2_Feature*const* features,
+	        const char*              uri,
+	        bool*                    valid)
+		: m_data(nullptr)
+		, m_supported(false)
+	{
+		for (const LV2_Feature*const* f = features; *f; ++f) {
+			if (!strcmp((*f)->URI, uri)) {
+				m_data      = (Data*)(*f)->data;
+				m_supported = true;
+				break;
+			}
+		}
+		if (Required && !m_supported) {
+			*valid = false;
+		}
+	}
+
+	Data* data()      const { return m_data; }
+	bool  supported() const { return m_supported; }
+
+protected:
+	Data* m_data;
+	bool  m_supported;
+};
+
+} // namespace lv2
+
+#endif // LV2_URID_HPP
-- 
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