First commit.

src/MapFeature.cpp

@@ -0,0 +1,63 @@
+#include "MapFeature.hpp"
+#include <mutex>
+
+using namespace pipedal;
+
+static LV2_URID mapFn(LV2_URID_Map_Handle handle, const char* uri)
+{
+	MapFeature* feature = (MapFeature*)(void*)handle;
+	return feature->GetUrid(uri);
+}
+static const char* unmapFn(LV2_URID_Map_Handle handle, LV2_URID urid)
+{
+	MapFeature* feature = (MapFeature*)(void*)handle;
+	return feature->UridToString(urid);
+}
+
+MapFeature::MapFeature()
+{
+	mapFeature.URI = LV2_URID__map;
+	mapFeature.data = &map;
+	map.handle = (void*)this;
+	map.map = &mapFn;
+
+    unmapFeature.URI = LV2_URID__unmap;
+    unmapFeature.data = &unmap;
+    unmap.handle = (void*)this;
+    unmap.unmap = &unmapFn;
+}
+
+MapFeature::~MapFeature()
+{
+    for (auto i = stdUnmap.begin(); i != stdUnmap.end(); ++i)
+    {
+        delete i->second;
+    }
+}
+
+LV2_URID MapFeature::GetUrid(const char* uri)
+{
+
+	std::lock_guard<std::mutex> guard(mapMutex);
+
+	LV2_URID result = stdMap[uri];
+	if (result == 0)
+	{
+		stdMap[uri] = ++nextAtom;
+		result = nextAtom;
+        std::string *stringRef = new std::string(uri);
+        stdUnmap[result] = stringRef;
+	}
+	return result;
+}
+
+const char*MapFeature::UridToString(LV2_URID urid)
+{
+	std::lock_guard<std::mutex> guard(mapMutex);
+
+    std::string*pResult = stdUnmap[urid];
+    if (pResult == nullptr) return nullptr;
+
+    return pResult->c_str();
+
+}