playlist/{asx,rss,soundcloud,xspf}: merge code to MemoryPlaylistProvider

8 files changed, 162 insertions, 257 deletions

diff --git a/src/playlist/AsxPlaylistPlugin.cxx b/src/playlist/AsxPlaylistPlugin.cxx
index 2a787f669..db571417c 100644
--- a/src/playlist/AsxPlaylistPlugin.cxx
+++ b/src/playlist/AsxPlaylistPlugin.cxx
@@ -19,7 +19,7 @@
 
 #include "config.h"
 #include "AsxPlaylistPlugin.hxx"
-#include "PlaylistPlugin.hxx"
+#include "MemoryPlaylistProvider.hxx"
 #include "input_stream.h"
 #include "song.h"
 #include "tag.h"
@@ -213,17 +213,10 @@ asx_parser_destroy(gpointer data)
  *
  */
 
-struct AsxPlaylist {
-	struct playlist_provider base;
-
-	GSList *songs;
-};
-
 static struct playlist_provider *
 asx_open_stream(struct input_stream *is)
 {
 	AsxParser parser;
-	AsxPlaylist *playlist;
 	GMarkupParseContext *context;
 	char buffer[1024];
 	size_t nbytes;
@@ -270,38 +263,13 @@ asx_open_stream(struct input_stream *is)
 
 	/* create a #AsxPlaylist object from the parsed song list */
 
-	playlist = g_new(AsxPlaylist, 1);
-	playlist_provider_init(&playlist->base, &asx_playlist_plugin);
-	playlist->songs = g_slist_reverse(parser.songs);
+	MemoryPlaylistProvider *playlist =
+		new MemoryPlaylistProvider(g_slist_reverse(parser.songs));
 	parser.songs = NULL;
 
 	g_markup_parse_context_free(context);
 
-	return &playlist->base;
-}
-
-static void
-asx_close(struct playlist_provider *_playlist)
-{
-	AsxPlaylist *playlist = (AsxPlaylist *)_playlist;
-
-	g_slist_foreach(playlist->songs, song_free_callback, NULL);
-	g_slist_free(playlist->songs);
-	g_free(playlist);
-}
-
-static struct song *
-asx_read(struct playlist_provider *_playlist)
-{
-	AsxPlaylist *playlist = (AsxPlaylist *)_playlist;
-
-	if (playlist->songs == NULL)
-		return NULL;
-
-	struct song *song = (struct song *)playlist->songs->data;
-	playlist->songs = g_slist_remove(playlist->songs, song);
-
-	return song;
+	return playlist;
 }
 
 static const char *const asx_suffixes[] = {
@@ -321,8 +289,8 @@ const struct playlist_plugin asx_playlist_plugin = {
 	nullptr,
 	nullptr,
 	asx_open_stream,
-	asx_close,
-	asx_read,
+	nullptr,
+	nullptr,
 
 	nullptr,
 	asx_suffixes,
diff --git a/src/playlist/DespotifyPlaylistPlugin.cxx b/src/playlist/DespotifyPlaylistPlugin.cxx
index 00b697e3f..09c1aa899 100644
--- a/src/playlist/DespotifyPlaylistPlugin.cxx
+++ b/src/playlist/DespotifyPlaylistPlugin.cxx
@@ -20,13 +20,9 @@
 #include "config.h"
 #include "DespotifyPlaylistPlugin.hxx"
 #include "DespotifyUtils.hxx"
-#include "PlaylistPlugin.hxx"
-#include "PlaylistRegistry.hxx"
-#include "conf.h"
-#include "uri.h"
+#include "MemoryPlaylistProvider.hxx"
 #include "tag.h"
 #include "song.h"
-#include "input_stream.h"
 
 extern "C" {
 #include <despotify.h>
@@ -34,13 +30,10 @@ extern "C" {
 
 #include <glib.h>
 
-#include <assert.h>
 #include <string.h>
 #include <stdlib.h>
 
 struct despotify_playlist {
-	struct playlist_provider base;
-
 	struct despotify_session *session;
 	GSList *list;
 };
@@ -116,7 +109,6 @@ static struct playlist_provider *
 despotify_playlist_open_uri(const char *url,
 			    gcc_unused Mutex &mutex, gcc_unused Cond &cond)
 {
-	struct despotify_playlist *ctx;
 	struct despotify_session *session;
 	struct ds_link *link;
 	bool parse_result;
@@ -132,19 +124,17 @@ despotify_playlist_open_uri(const char *url,
 		goto clean_none;
 	}
 
-	ctx = g_new(struct despotify_playlist, 1);
-
-	ctx->list = nullptr;
-	ctx->session = session;
-	playlist_provider_init(&ctx->base, &despotify_playlist_plugin);
+	struct despotify_playlist ctx;
+	ctx.list = nullptr;
+	ctx.session = session;
 
 	switch (link->type)
 	{
 	case LINK_TYPE_TRACK:
-		parse_result = parse_track(ctx, link);
+		parse_result = parse_track(&ctx, link);
 		break;
 	case LINK_TYPE_PLAYLIST:
-		parse_result = parse_playlist(ctx, link);
+		parse_result = parse_playlist(&ctx, link);
 		break;
 	default:
 		parse_result = false;
@@ -154,53 +144,15 @@ despotify_playlist_open_uri(const char *url,
 	if (!parse_result)
 		goto clean_playlist;
 
-	ctx->list = g_slist_reverse(ctx->list);
-
-	return &ctx->base;
+	return new MemoryPlaylistProvider(g_slist_reverse(ctx.list));
 
 clean_playlist:
-	g_slist_free(ctx->list);
+	g_slist_free(ctx.list);
 clean_none:
 
 	return nullptr;
 }
 
-static void
-track_free_callback(gpointer data, G_GNUC_UNUSED gpointer user_data)
-{
-	struct song *song = (struct song *)data;
-
-	song_free(song);
-}
-
-static void
-despotify_playlist_close(struct playlist_provider *_playlist)
-{
-	struct despotify_playlist *ctx = (struct despotify_playlist *)_playlist;
-
-	g_slist_foreach(ctx->list, track_free_callback, nullptr);
-	g_slist_free(ctx->list);
-
-	g_free(ctx);
-}
-
-
-static struct song *
-despotify_playlist_read(struct playlist_provider *_playlist)
-{
-	struct despotify_playlist *ctx = (struct despotify_playlist *)_playlist;
-
-	if (!ctx->list)
-		return nullptr;
-
-	/* Remove the current track */
-	song *out = (song *)ctx->list->data;
-	ctx->list = g_slist_remove(ctx->list, out);
-
-	return out;
-}
-
-
 static const char *const despotify_schemes[] = {
 	"spt",
 	nullptr
@@ -214,8 +166,8 @@ const struct playlist_plugin despotify_playlist_plugin = {
 
 	despotify_playlist_open_uri,
 	nullptr,
-	despotify_playlist_close,
-	despotify_playlist_read,
+	nullptr,
+	nullptr,
 
 	despotify_schemes,
 	nullptr,
diff --git a/src/playlist/MemoryPlaylistProvider.cxx b/src/playlist/MemoryPlaylistProvider.cxx
new file mode 100644
index 000000000..b643ec50c
--- /dev/null
+++ b/src/playlist/MemoryPlaylistProvider.cxx
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2003-2013 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 "config.h"
+#include "MemoryPlaylistProvider.hxx"
+#include "song.h"
+
+static void
+memory_playlist_close(struct playlist_provider *_playlist)
+{
+	MemoryPlaylistProvider *playlist = (MemoryPlaylistProvider *)_playlist;
+
+	delete playlist;
+}
+
+static struct song *
+memory_playlist_read(struct playlist_provider *_playlist)
+{
+	MemoryPlaylistProvider *playlist = (MemoryPlaylistProvider *)_playlist;
+
+	return playlist->Read();
+}
+
+static constexpr struct playlist_plugin memory_playlist_plugin = {
+	nullptr,
+
+	nullptr,
+	nullptr,
+	nullptr,
+	nullptr,
+	memory_playlist_close,
+	memory_playlist_read,
+
+	nullptr,
+	nullptr,
+	nullptr,
+};
+
+MemoryPlaylistProvider::MemoryPlaylistProvider(GSList *_songs)
+	:songs(_songs) {
+	playlist_provider_init(this, &memory_playlist_plugin);
+}
+
+static void
+song_free_callback(gpointer data, G_GNUC_UNUSED gpointer user_data)
+{
+	struct song *song = (struct song *)data;
+
+	song_free(song);
+}
+
+MemoryPlaylistProvider::~MemoryPlaylistProvider()
+{
+	g_slist_foreach(songs, song_free_callback, NULL);
+	g_slist_free(songs);
+}
+
+inline song *
+MemoryPlaylistProvider::Read()
+{
+	if (songs == nullptr)
+		return nullptr;
+
+	song *result = (song *)songs->data;
+	songs = g_slist_remove(songs, result);
+	return result;
+}
+
diff --git a/src/playlist/MemoryPlaylistProvider.hxx b/src/playlist/MemoryPlaylistProvider.hxx
new file mode 100644
index 000000000..ad0a74d8a
--- /dev/null
+++ b/src/playlist/MemoryPlaylistProvider.hxx
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2003-2013 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.
+ */
+
+#ifndef MPD_MEMORY_PLAYLIST_PROVIDER_HXX
+#define MPD_MEMORY_PLAYLIST_PROVIDER_HXX
+
+#include "PlaylistPlugin.hxx"
+
+#include <glib.h>
+
+struct song;
+
+class MemoryPlaylistProvider : public playlist_provider {
+	GSList *songs;
+
+public:
+	MemoryPlaylistProvider(GSList *_songs);
+	~MemoryPlaylistProvider();
+
+	song *Read();
+};
+
+#endif
diff --git a/src/playlist/PlsPlaylistPlugin.cxx b/src/playlist/PlsPlaylistPlugin.cxx
index 8cb8b4f1d..cecabc88e 100644
--- a/src/playlist/PlsPlaylistPlugin.cxx
+++ b/src/playlist/PlsPlaylistPlugin.cxx
@@ -19,7 +19,7 @@
 
 #include "config.h"
 #include "PlsPlaylistPlugin.hxx"
-#include "PlaylistPlugin.hxx"
+#include "MemoryPlaylistProvider.hxx"
 #include "input_stream.h"
 #include "uri.h"
 #include "song.h"
@@ -28,8 +28,6 @@
 #include <glib.h>
 
 struct PlsPlaylist {
-	struct playlist_provider base;
-
 	GSList *songs;
 };
 
@@ -112,7 +110,6 @@ pls_open_stream(struct input_stream *is)
 	char buffer[1024];
 	bool success;
 	GKeyFile *keyfile;
-	PlsPlaylist *playlist;
 	GString *kf_data = g_string_new("");
 
 	do {
@@ -153,49 +150,13 @@ pls_open_stream(struct input_stream *is)
 		return NULL;
 	}
 
-	playlist = g_new(PlsPlaylist, 1);
-	playlist_provider_init(&playlist->base, &pls_playlist_plugin);
-	playlist->songs = NULL;
-
-	pls_parser(keyfile, playlist);
+	PlsPlaylist playlist;
+	playlist.songs = nullptr;
 
+	pls_parser(keyfile, &playlist);
 	g_key_file_free(keyfile);
-	return &playlist->base;
-}
-
-
-static void
-song_free_callback(gpointer data, G_GNUC_UNUSED gpointer user_data)
-{
-	struct song *song = (struct song *)data;
 
-	song_free(song);
-}
-
-static void
-pls_close(struct playlist_provider *_playlist)
-{
-	PlsPlaylist *playlist = (PlsPlaylist *)_playlist;
-
-	g_slist_foreach(playlist->songs, song_free_callback, NULL);
-	g_slist_free(playlist->songs);
-
-	g_free(playlist);
-
-}
-
-static struct song *
-pls_read(struct playlist_provider *_playlist)
-{
-	PlsPlaylist *playlist = (PlsPlaylist *)_playlist;
-
-	if (playlist->songs == NULL)
-		return NULL;
-
-	struct song *song = (struct song *)playlist->songs->data;
-	playlist->songs = g_slist_remove(playlist->songs, song);
-
-	return song;
+	return new MemoryPlaylistProvider(g_slist_reverse(playlist.songs));
 }
 
 static const char *const pls_suffixes[] = {
@@ -215,8 +176,8 @@ const struct playlist_plugin pls_playlist_plugin = {
 	nullptr,
 	nullptr,
 	pls_open_stream,
-	pls_close,
-	pls_read,
+	nullptr,
+	nullptr,
 
 	nullptr,
 	pls_suffixes,
diff --git a/src/playlist/RssPlaylistPlugin.cxx b/src/playlist/RssPlaylistPlugin.cxx
index 9b95683c7..1c714a965 100644
--- a/src/playlist/RssPlaylistPlugin.cxx
+++ b/src/playlist/RssPlaylistPlugin.cxx
@@ -19,7 +19,7 @@
 
 #include "config.h"
 #include "RssPlaylistPlugin.hxx"
-#include "PlaylistPlugin.hxx"
+#include "MemoryPlaylistProvider.hxx"
 #include "input_stream.h"
 #include "song.h"
 #include "tag.h"
@@ -209,17 +209,10 @@ rss_parser_destroy(gpointer data)
  *
  */
 
-struct RssPlaylist {
-	struct playlist_provider base;
-
-	GSList *songs;
-};
-
 static struct playlist_provider *
 rss_open_stream(struct input_stream *is)
 {
 	RssParser parser;
-	RssPlaylist *playlist;
 	GMarkupParseContext *context;
 	char buffer[1024];
 	size_t nbytes;
@@ -266,38 +259,13 @@ rss_open_stream(struct input_stream *is)
 
 	/* create a #rss_playlist object from the parsed song list */
 
-	playlist = g_new(RssPlaylist, 1);
-	playlist_provider_init(&playlist->base, &rss_playlist_plugin);
-	playlist->songs = g_slist_reverse(parser.songs);
+	MemoryPlaylistProvider *playlist =
+		new MemoryPlaylistProvider(g_slist_reverse(parser.songs));
 	parser.songs = NULL;
 
 	g_markup_parse_context_free(context);
 
-	return &playlist->base;
-}
-
-static void
-rss_close(struct playlist_provider *_playlist)
-{
-	RssPlaylist *playlist = (RssPlaylist *)_playlist;
-
-	g_slist_foreach(playlist->songs, song_free_callback, NULL);
-	g_slist_free(playlist->songs);
-	g_free(playlist);
-}
-
-static struct song *
-rss_read(struct playlist_provider *_playlist)
-{
-	RssPlaylist *playlist = (RssPlaylist *)_playlist;
-
-	if (playlist->songs == NULL)
-		return NULL;
-
-	struct song *song = (struct song *)playlist->songs->data;
-	playlist->songs = g_slist_remove(playlist->songs, song);
-
-	return song;
+	return playlist;
 }
 
 static const char *const rss_suffixes[] = {
@@ -318,8 +286,8 @@ const struct playlist_plugin rss_playlist_plugin = {
 	nullptr,
 	nullptr,
 	rss_open_stream,
-	rss_close,
-	rss_read,
+	nullptr,
+	nullptr,
 
 	nullptr,
 	rss_suffixes,
diff --git a/src/playlist/SoundCloudPlaylistPlugin.cxx b/src/playlist/SoundCloudPlaylistPlugin.cxx
index eefa23dd3..b236481a0 100644
--- a/src/playlist/SoundCloudPlaylistPlugin.cxx
+++ b/src/playlist/SoundCloudPlaylistPlugin.cxx
@@ -19,7 +19,7 @@
 
 #include "config.h"
 #include "SoundCloudPlaylistPlugin.hxx"
-#include "PlaylistPlugin.hxx"
+#include "MemoryPlaylistProvider.hxx"
 #include "conf.h"
 #include "input_stream.h"
 #include "song.h"
@@ -30,12 +30,6 @@
 
 #include <string.h>
 
-struct soundcloud_playlist {
-	struct playlist_provider base;
-
-	GSList *songs;
-};
-
 static struct {
 	char *apikey;
 } soundcloud_config;
@@ -326,8 +320,6 @@ soundcloud_parse_json(const char *url, yajl_handle hand,
 static struct playlist_provider *
 soundcloud_open_uri(const char *uri, Mutex &mutex, Cond &cond)
 {
-	struct soundcloud_playlist *playlist = NULL;
-
 	char *s, *p;
 	char *scheme, *arg, *rest;
 	s = g_strdup(uri);
@@ -399,34 +391,7 @@ soundcloud_open_uri(const char *uri, Mutex &mutex, Cond &cond)
 	if (ret == -1)
 		return NULL;
 
-	playlist = g_new(struct soundcloud_playlist, 1);
-	playlist_provider_init(&playlist->base, &soundcloud_playlist_plugin);
-	playlist->songs = g_slist_reverse(data.songs);
-
-	return &playlist->base;
-}
-
-static void
-soundcloud_close(struct playlist_provider *_playlist)
-{
-	struct soundcloud_playlist *playlist = (struct soundcloud_playlist *)_playlist;
-
-	g_free(playlist);
-}
-
-
-static struct song *
-soundcloud_read(struct playlist_provider *_playlist)
-{
-	struct soundcloud_playlist *playlist = (struct soundcloud_playlist *)_playlist;
-
-	if (playlist->songs == NULL)
-		return NULL;
-
-	struct song* s;
-	s = (struct song *)playlist->songs->data;
-	playlist->songs = g_slist_remove(playlist->songs, s);
-	return s;
+	return new MemoryPlaylistProvider(g_slist_reverse(data.songs));
 }
 
 static const char *const soundcloud_schemes[] = {
@@ -441,8 +406,8 @@ const struct playlist_plugin soundcloud_playlist_plugin = {
 	soundcloud_finish,
 	soundcloud_open_uri,
 	nullptr,
-	soundcloud_close,
-	soundcloud_read,
+	nullptr,
+	nullptr,
 
 	soundcloud_schemes,
 	nullptr,
diff --git a/src/playlist/XspfPlaylistPlugin.cxx b/src/playlist/XspfPlaylistPlugin.cxx
index 95033d4e8..38bcbdf9d 100644
--- a/src/playlist/XspfPlaylistPlugin.cxx
+++ b/src/playlist/XspfPlaylistPlugin.cxx
@@ -19,7 +19,7 @@
 
 #include "config.h"
 #include "XspfPlaylistPlugin.hxx"
-#include "PlaylistPlugin.hxx"
+#include "MemoryPlaylistProvider.hxx"
 #include "input_stream.h"
 #include "uri.h"
 #include "song.h"
@@ -231,17 +231,10 @@ xspf_parser_destroy(gpointer data)
  *
  */
 
-struct XspfPlaylist {
-	struct playlist_provider base;
-
-	GSList *songs;
-};
-
 static struct playlist_provider *
 xspf_open_stream(struct input_stream *is)
 {
 	XspfParser parser;
-	XspfPlaylist *playlist;
 	GMarkupParseContext *context;
 	char buffer[1024];
 	size_t nbytes;
@@ -288,38 +281,13 @@ xspf_open_stream(struct input_stream *is)
 
 	/* create a #xspf_playlist object from the parsed song list */
 
-	playlist = g_new(XspfPlaylist, 1);
-	playlist_provider_init(&playlist->base, &xspf_playlist_plugin);
-	playlist->songs = g_slist_reverse(parser.songs);
+	MemoryPlaylistProvider *playlist =
+		new MemoryPlaylistProvider(g_slist_reverse(parser.songs));
 	parser.songs = NULL;
 
 	g_markup_parse_context_free(context);
 
-	return &playlist->base;
-}
-
-static void
-xspf_close(struct playlist_provider *_playlist)
-{
-	XspfPlaylist *playlist = (XspfPlaylist *)_playlist;
-
-	g_slist_foreach(playlist->songs, song_free_callback, NULL);
-	g_slist_free(playlist->songs);
-	g_free(playlist);
-}
-
-static struct song *
-xspf_read(struct playlist_provider *_playlist)
-{
-	XspfPlaylist *playlist = (XspfPlaylist *)_playlist;
-
-	if (playlist->songs == NULL)
-		return NULL;
-
-	struct song *song = (struct song *)playlist->songs->data;
-	playlist->songs = g_slist_remove(playlist->songs, song);
-
-	return song;
+	return playlist;
 }
 
 static const char *const xspf_suffixes[] = {
@@ -339,8 +307,8 @@ const struct playlist_plugin xspf_playlist_plugin = {
 	nullptr,
 	nullptr,
 	xspf_open_stream,
-	xspf_close,
-	xspf_read,
+	nullptr,
+	nullptr,
 
 	nullptr,
 	xspf_suffixes,