Method lookupModule

src/jrd/flu.cpp:182–259

flag 'udf' means pass name-path through UdfDirectoryList

	// flag 'udf' means pass name-path through UdfDirectoryList
	Module Module::lookupModule(const char* name)
	{
		Firebird::MutexLockGuard lg(modulesMutex, FB_FUNCTION);

		Firebird::PathName initialModule;
		terminate_at_space(initialModule, name);

		// Look for module in array of already loaded
		InternalModule* im = scanModule(initialModule);
		if (im)
		{
			return Module(im);
		}

		// apply suffix (and/or prefix) and try that name
		Firebird::PathName module(initialModule);
		for (size_t i = 0; i < sizeof(libfixes) / sizeof(Libfix); i++)
		{
			const Libfix* l = &libfixes[i];
			// os-dependent module name modification
			Firebird::PathName fixedModule(module);
			switch (l->kind)
			{
			case MOD_PREFIX:
				fixedModule = l->txt + fixedModule;
				break;
			case MOD_SUFFIX:
				fixedModule += l->txt;
			}
			if (l->permanent)
			{
				module = fixedModule;
			}

			// Look for module with fixed name
			im = scanModule(fixedModule);
			if (im)
			{
				return Module(im);
			}

			// UdfAccess verification
			Firebird::PathName path, relative;

			// Search for module name in UdfAccess restricted
			// paths list
			PathUtils::splitLastComponent(path, relative, fixedModule);
			if (path.isEmpty() && PathUtils::isRelative(fixedModule))
			{
				path = fixedModule;
				if (! iUdfDirectoryList().expandFileName(fixedModule, path))
				{
					// relative path was used, but no appropriate file present
					continue;
				}
			}

			// The module name, including directory path,