input/Plugin: add `noexcept`

src/input/InputPlugin.cxx

@@ -63,7 +63,8 @@ constexpr static const char *whitelist[] = {
 };
 
 bool
-protocol_is_whitelisted(const char *proto) {
+protocol_is_whitelisted(const char *proto) noexcept
+{
 	auto begin = std::begin(whitelist);
 	auto end = std::end(whitelist);
 	return std::binary_search(begin, end, proto, [](const char* a, const char* b) {

src/input/InputPlugin.hxx

@@ -56,7 +56,7 @@ struct InputPlugin {
 	 * Global deinitialization.  Called once before MPD shuts
 	 * down (only if init() has returned true).
 	 */
-	void (*finish)();
+	void (*finish)() noexcept;
 
 	/**
 	 * Attempt to open the given URI.  Returns nullptr if the
@@ -69,7 +69,7 @@ struct InputPlugin {
 	/**
 	 * return a set of supported protocols
 	 */
-	std::set<std::string> (*protocols)();
+	std::set<std::string> (*protocols)() noexcept;
 
 	/**
 	 * Prepare a #RemoteTagScanner.  The operation must be started
@@ -103,7 +103,8 @@ struct InputPlugin {
 	}
 };
 
+gcc_pure
 bool
-protocol_is_whitelisted(const char *proto);
+protocol_is_whitelisted(const char *proto) noexcept;
 
 #endif

src/input/plugins/CurlInputPlugin.cxx

@@ -516,7 +516,8 @@ input_curl_open(const char *url, Mutex &mutex)
 }
 
 static std::set<std::string>
-input_curl_protocols() {
+input_curl_protocols() noexcept
+{
 	std::set<std::string> protocols;
 	auto version_info = curl_version_info(CURLVERSION_FIRST);
 	for (auto proto_ptr = version_info->protocols; *proto_ptr != nullptr; proto_ptr++) {

src/input/plugins/FfmpegInputPlugin.cxx

@@ -73,7 +73,8 @@ input_ffmpeg_init(EventLoop &, const ConfigBlock &)
 }
 
 static std::set<std::string>
-input_ffmpeg_protocols() {
+input_ffmpeg_protocols() noexcept
+{
 	void *opaque = nullptr;
 	const char* protocol;
 	std::set<std::string> protocols;

src/input/plugins/QobuzInputPlugin.cxx

@@ -158,7 +158,7 @@ InitQobuzInput(EventLoop &event_loop, const ConfigBlock &block)
 }
 
 static void
-FinishQobuzInput()
+FinishQobuzInput() noexcept
 {
 	delete qobuz_client;
 }

src/input/plugins/TidalInputPlugin.cxx

@@ -189,7 +189,7 @@ InitTidalInput(EventLoop &event_loop, const ConfigBlock &block)
 }
 
 static void
-FinishTidalInput()
+FinishTidalInput() noexcept
 {
 	delete tidal_session;
 }