tree and document plug-ins

src/plugin/plugin.cpp

@@ -19,6 +19,12 @@
 
 #include "plugin.h"
 
+#ifndef _WIN32
+#include <dlfcn.h>
+#else
+#include <windows.h>
+#endif
+
 #include <boost/algorithm/string/predicate.hpp>
 #include <boost/dll/shared_library.hpp>
 
@@ -195,3 +201,30 @@ void ifcopenshell::plugin::validate_abi(const abi_info& abi) {
 	stream << " (plugin debug " << abi.debug_build << ", host debug " << host.debug_build << ")";
 	throw std::runtime_error(stream.str());
 }
+
+std::filesystem::path ifcopenshell::plugin::module_directory(const void* symbol) {
+#ifdef _WIN32
+	HMODULE module_handle = nullptr;
+	if (!GetModuleHandleExW(
+		GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
+		reinterpret_cast<LPCWSTR>(symbol),
+		&module_handle)) {
+		throw std::runtime_error("Unable to resolve module path");
+	}
+
+	wchar_t buffer[MAX_PATH];
+	const DWORD length = GetModuleFileNameW(module_handle, buffer, MAX_PATH);
+	if (length == 0) {
+		throw std::runtime_error("Unable to read module filename");
+	}
+
+	return std::filesystem::path(std::wstring(buffer, length)).parent_path();
+#else
+	Dl_info info;
+	if (dladdr(symbol, &info) == 0 || !info.dli_fname) {
+		throw std::runtime_error("Unable to resolve module path");
+	}
+
+	return std::filesystem::path(info.dli_fname).parent_path();
+#endif
+}

src/plugin/plugin.h

@@ -37,6 +37,7 @@ enum class kind {
 	parse_schema,
 	mapping,
 	kernel,
+	tree,
 	document_serializer,
 	geometry_serializer,
 	opencascade_geometry_ifc_writer
@@ -101,6 +102,7 @@ private:
 
 PLUGIN_API abi_info host_abi();
 PLUGIN_API void validate_abi(const abi_info& abi);
+PLUGIN_API std::filesystem::path module_directory(const void* symbol);
 
 }
 }

src/plugin/plugin_api.h

@@ -20,7 +20,9 @@
 #ifndef PLUGIN_API_H
 #define PLUGIN_API_H
 
-#ifdef _WIN32
+#ifdef SWIG
+#define PLUGIN_API
+#elif defined(_WIN32)
 #ifdef PLUGIN_EXPORTS
 #define PLUGIN_API __declspec(dllexport)
 #else