Song: GetURI() returns std::string

src/DecoderThread.cxx

@@ -422,16 +422,13 @@ decoder_run(struct decoder_control *dc)
 	dc->ClearError();
 
 	const Song *song = dc->song;
-	char *uri;
-
 	assert(song != NULL);
 
-	if (song->IsFile())
-		uri = g_strdup(map_song_fs(song).c_str());
-	else
-		uri = song->GetURI();
+	const std::string uri = song->IsFile()
+		? std::string(map_song_fs(song).c_str())
+		: song->GetURI();
 
-	if (uri == NULL) {
+	if (uri.empty()) {
 		dc->state = DecoderState::ERROR;
 		dc->error.Set(decoder_domain, "Failed to map song");
 
@@ -439,8 +436,7 @@ decoder_run(struct decoder_control *dc)
 		return;
 	}
 
-	decoder_run_song(dc, song, uri);
-	g_free(uri);
+	decoder_run_song(dc, song, uri.c_str());
 
 }
 

src/PlayerThread.cxx

@@ -461,12 +461,10 @@ Player::CheckDecoderStartup()
 		decoder_starting = false;
 
 		if (!paused && !OpenOutput()) {
-			char *uri = dc.song->GetURI();
+			const auto uri = dc.song->GetURI();
 			FormatError(player_domain,
 				    "problems opening audio device "
-				    "while playing \"%s\"", uri);
-			g_free(uri);
-
+				    "while playing \"%s\"", uri.c_str());
 			return true;
 		}
 
@@ -878,9 +876,10 @@ Player::SongBorder()
 {
 	xfade_state = CrossFadeState::UNKNOWN;
 
-	char *uri = song->GetURI();
-	FormatInfo(player_domain, "played \"%s\"", uri);
-	g_free(uri);
+	{
+		const auto uri = song->GetURI();
+		FormatInfo(player_domain, "played \"%s\"", uri.c_str());
+	}
 
 	ReplacePipe(dc.pipe);
 

src/Playlist.cxx

@@ -25,8 +25,6 @@
 #include "Idle.hxx"
 #include "Log.hxx"
 
-#include <glib.h>
-
 #include <assert.h>
 
 void
@@ -55,18 +53,17 @@ static void
 playlist_queue_song_order(struct playlist *playlist, struct player_control *pc,
 			  unsigned order)
 {
-	char *uri;
-
 	assert(playlist->queue.IsValidOrder(order));
 
 	playlist->queued = order;
 
 	Song *song = playlist->queue.GetOrder(order)->DupDetached();
 
-	uri = song->GetURI();
-	FormatDebug(playlist_domain, "queue song %i:\"%s\"",
-		    playlist->queued, uri);
-	g_free(uri);
+	{
+		const auto uri = song->GetURI();
+		FormatDebug(playlist_domain, "queue song %i:\"%s\"",
+			    playlist->queued, uri.c_str());
+	}
 
 	pc->EnqueueSong(song);
 }
@@ -155,9 +152,11 @@ playlist::PlayOrder(player_control &pc, int order)
 
 	Song *song = queue.GetOrder(order)->DupDetached();
 
-	char *uri = song->GetURI();
-	FormatDebug(playlist_domain, "play %i:\"%s\"", order, uri);
-	g_free(uri);
+	{
+		const auto uri = song->GetURI();
+		FormatDebug(playlist_domain, "play %i:\"%s\"",
+			    order, uri.c_str());
+	}
 
 	pc.Play(song);
 	current = order;

src/PlaylistSave.cxx

@@ -43,9 +43,8 @@ playlist_print_song(FILE *file, const Song *song)
 		if (!path.IsNull())
 			fprintf(file, "%s\n", path.c_str());
 	} else {
-		char *uri = song->GetURI();
-		const Path uri_fs = Path::FromUTF8(uri);
-		g_free(uri);
+		const auto uri_utf8 = song->GetURI();
+		const Path uri_fs = Path::FromUTF8(uri_utf8.c_str());
 
 		if (!uri_fs.IsNull())
 			fprintf(file, "%s\n", uri_fs.c_str());

src/QueueSave.cxx

@@ -40,10 +40,8 @@
 static void
 queue_save_database_song(FILE *fp, int idx, const Song *song)
 {
-	char *uri = song->GetURI();
-
-	fprintf(fp, "%i:%s\n", idx, uri);
-	g_free(uri);
+	const auto uri = song->GetURI();
+	fprintf(fp, "%i:%s\n", idx, uri.c_str());
 }
 
 static void

src/Song.cxx

@@ -89,9 +89,8 @@ Song::DupDetached() const
 {
 	Song *song;
 	if (IsInDatabase()) {
-		char *new_uri = GetURI();
-		song = NewDetached(new_uri);
-		g_free(new_uri);
+		const auto new_uri = GetURI();
+		song = NewDetached(new_uri.c_str());
 	} else
 		song = song_alloc(uri, nullptr);
 
@@ -138,28 +137,32 @@ song_equals(const Song *a, const Song *b)
 	    (a->parent == &detached_root || b->parent == &detached_root)) {
 		/* must compare the full URI if one of the objects is
 		   "detached" */
-		char *au = a->GetURI();
-		char *bu = b->GetURI();
-		const bool result = strcmp(au, bu) == 0;
-		g_free(bu);
-		g_free(au);
-		return result;
+		const auto au = a->GetURI();
+		const auto bu = b->GetURI();
+		return au == bu;
 	}
 
 	return directory_is_same(a->parent, b->parent) &&
 		strcmp(a->uri, b->uri) == 0;
 }
 
-char *
+std::string
 Song::GetURI() const
 {
 	assert(*uri);
 
 	if (!IsInDatabase() || parent->IsRoot())
-		return g_strdup(uri);
-	else
-		return g_strconcat(parent->GetPath(),
-				   "/", uri, nullptr);
+		return std::string(uri);
+	else {
+		const char *path = parent->GetPath();
+
+		std::string result;
+		result.reserve(strlen(path) + 1 + strlen(uri));
+		result.assign(path);
+		result.push_back('/');
+		result.append(uri);
+		return result;
+	}
 }
 
 double

src/Song.hxx

@@ -23,6 +23,8 @@
 #include "util/list.h"
 #include "Compiler.h"
 
+#include <string>
+
 #include <assert.h>
 #include <sys/time.h>
 
@@ -126,12 +128,9 @@ struct Song {
 	/**
 	 * Returns the URI of the song in UTF-8 encoding, including its
 	 * location within the music directory.
-	 *
-	 * The return value is allocated on the heap, and must be freed by the
-	 * caller.
 	 */
-	gcc_malloc
-	char *GetURI() const;
+	gcc_pure
+	std::string GetURI() const;
 
 	gcc_pure
 	double GetDuration() const;

src/SongFilter.cxx

@@ -123,9 +123,8 @@ bool
 SongFilter::Item::Match(const Song &song) const
 {
 	if (tag == LOCATE_TAG_FILE_TYPE || tag == LOCATE_TAG_ANY_TYPE) {
-		char *uri = song.GetURI();
-		const bool result = StringMatch(uri);
-		g_free(uri);
+		const auto uri = song.GetURI();
+		const bool result = StringMatch(uri.c_str());
 
 		if (result || tag == LOCATE_TAG_FILE_TYPE)
 			return result;

src/SongSticker.cxx

@@ -34,11 +34,8 @@ sticker_song_get_value(const Song *song, const char *name)
 	assert(song != NULL);
 	assert(song->IsInDatabase());
 
-	char *uri = song->GetURI();
-	char *value = sticker_load_value("song", uri, name);
-	g_free(uri);
-
-	return value;
+	const auto uri = song->GetURI();
+	return sticker_load_value("song", uri.c_str(), name);
 }
 
 bool
@@ -48,11 +45,8 @@ sticker_song_set_value(const Song *song,
 	assert(song != NULL);
 	assert(song->IsInDatabase());
 
-	char *uri = song->GetURI();
-	bool ret = sticker_store_value("song", uri, name, value);
-	g_free(uri);
-
-	return ret;
+	const auto uri = song->GetURI();
+	return sticker_store_value("song", uri.c_str(), name, value);
 }
 
 bool
@@ -61,11 +55,8 @@ sticker_song_delete(const Song *song)
 	assert(song != NULL);
 	assert(song->IsInDatabase());
 
-	char *uri = song->GetURI();
-	bool ret = sticker_delete("song", uri);
-	g_free(uri);
-
-	return ret;
+	const auto uri = song->GetURI();
+	return sticker_delete("song", uri.c_str());
 }
 
 bool
@@ -74,11 +65,8 @@ sticker_song_delete_value(const Song *song, const char *name)
 	assert(song != NULL);
 	assert(song->IsInDatabase());
 
-	char *uri = song->GetURI();
-	bool success = sticker_delete_value("song", uri, name);
-	g_free(uri);
-
-	return success;
+	const auto uri = song->GetURI();
+	return sticker_delete_value("song", uri.c_str(), name);
 }
 
 struct sticker *
@@ -87,11 +75,8 @@ sticker_song_get(const Song *song)
 	assert(song != NULL);
 	assert(song->IsInDatabase());
 
-	char *uri = song->GetURI();
-	struct sticker *sticker = sticker_load("song", uri);
-	g_free(uri);
-
-	return sticker;
+	const auto uri = song->GetURI();
+	return sticker_load("song", uri.c_str());
 }
 
 struct sticker_song_find_data {

src/UpdateRemove.cxx

@@ -50,13 +50,12 @@ static Cond remove_cond;
 static void
 song_remove_event(void)
 {
-	char *uri;
-
 	assert(removed_song != NULL);
 
-	uri = removed_song->GetURI();
-	FormatInfo(update_domain, "removing %s", uri);
-	g_free(uri);
+	{
+		const auto uri = removed_song->GetURI();
+		FormatInfo(update_domain, "removing %s", uri.c_str());
+	}
 
 #ifdef ENABLE_SQLITE
 	/* if the song has a sticker, remove it */