playlist/Plugin: add SupportsSuffix(), SupportsMimeType()

src/playlist/PlaylistPlugin.cxx

+/*
+ * Copyright 2003-2019 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "PlaylistPlugin.hxx"
+#include "util/StringUtil.hxx"
+#include "util/StringView.hxx"
+
+bool
+PlaylistPlugin::SupportsScheme(StringView scheme) const noexcept
+{
+	return schemes != nullptr &&
+		StringArrayContainsCase(schemes, scheme);
+}
+
+bool
+PlaylistPlugin::SupportsSuffix(const char *suffix) const noexcept
+{
+	return suffixes != nullptr &&
+		StringArrayContainsCase(suffixes, suffix);
+}
+
+bool
+PlaylistPlugin::SupportsMimeType(StringView mime_type) const noexcept
+{
+	return mime_types != nullptr &&
+		StringArrayContainsCase(mime_types, mime_type);
+}

src/playlist/PlaylistPlugin.hxx

@@ -22,9 +22,11 @@
 
 #include "input/Ptr.hxx"
 #include "thread/Mutex.hxx"
+#include "util/Compiler.h"
 
 struct ConfigBlock;
 struct Tag;
+struct StringView;
 class SongEnumerator;
 
 struct PlaylistPlugin {
@@ -101,6 +103,24 @@ struct PlaylistPlugin {
 		copy.mime_types = _mime_types;
 		return copy;
 	}
+
+	/**
+	 * Does the plugin announce the specified URI scheme?
+	 */
+	gcc_pure gcc_nonnull_all
+	bool SupportsScheme(StringView scheme) const noexcept;
+
+	/**
+	 * Does the plugin announce the specified file name suffix?
+	 */
+	gcc_pure gcc_nonnull_all
+	bool SupportsSuffix(const char *suffix) const noexcept;
+
+	/**
+	 * Does the plugin announce the specified MIME type?
+	 */
+	gcc_pure gcc_nonnull_all
+	bool SupportsMimeType(StringView mime_type) const noexcept;
 };
 
 /**

src/playlist/PlaylistRegistry.cxx

@@ -33,7 +33,6 @@
 #include "plugins/EmbeddedCuePlaylistPlugin.hxx"
 #include "input/InputStream.hxx"
 #include "util/MimeType.hxx"
-#include "util/StringUtil.hxx"
 #include "util/StringView.hxx"
 #include "util/UriExtract.hxx"
 #include "config/Data.hxx"
@@ -122,8 +121,7 @@ playlist_list_open_uri_scheme(const char *uri, Mutex &mutex,
 		assert(!tried[i]);
 
 		if (playlist_plugins_enabled[i] && plugin->open_uri != nullptr &&
-		    plugin->schemes != nullptr &&
-		    StringArrayContainsCase(plugin->schemes, scheme)) {
+		    plugin->SupportsScheme(scheme)) {
 			auto playlist = plugin->open_uri(uri, mutex);
 			if (playlist)
 				return playlist;
@@ -150,8 +148,8 @@ playlist_list_open_uri_suffix(const char *uri, Mutex &mutex,
 		const auto *plugin = playlist_plugins[i];
 
 		if (playlist_plugins_enabled[i] && !tried[i] &&
-		    plugin->open_uri != nullptr && plugin->suffixes != nullptr &&
-		    StringArrayContainsCase(plugin->suffixes, suffix)) {
+		    plugin->open_uri != nullptr &&
+		    plugin->SupportsSuffix(suffix)) {
 			auto playlist = plugin->open_uri(uri, mutex);
 			if (playlist != nullptr)
 				return playlist;
@@ -183,8 +181,7 @@ playlist_list_open_stream_mime2(InputStreamPtr &&is, StringView mime)
 {
 	playlist_plugins_for_each_enabled(plugin) {
 		if (plugin->open_stream != nullptr &&
-		    plugin->mime_types != nullptr &&
-		    StringArrayContainsCase(plugin->mime_types, mime)) {
+		    plugin->SupportsMimeType(mime)) {
 			/* rewind the stream, so each plugin gets a
 			   fresh start */
 			try {
@@ -233,8 +230,7 @@ playlist_list_open_stream_suffix(InputStreamPtr &&is, const char *suffix)
 
 	playlist_plugins_for_each_enabled(plugin) {
 		if (plugin->open_stream != nullptr &&
-		    plugin->suffixes != nullptr &&
-		    StringArrayContainsCase(plugin->suffixes, suffix)) {
+		    plugin->SupportsSuffix(suffix)) {
 			/* rewind the stream, so each plugin gets a
 			   fresh start */
 			try {
@@ -284,8 +280,7 @@ playlist_suffix_supported(const char *suffix) noexcept
 	assert(suffix != nullptr);
 
 	playlist_plugins_for_each_enabled(plugin) {
-		if (plugin->suffixes != nullptr &&
-		    StringArrayContainsCase(plugin->suffixes, suffix))
+		if (plugin->SupportsSuffix(suffix))
 			return true;
 	}
 

src/playlist/meson.build

 playlist_api = static_library(
   'playlist_api',
+  'PlaylistPlugin.cxx',
   'MemorySongEnumerator.cxx',
   include_directories: inc,
 )