1 files changed, 181 insertions, 0 deletions
diff --git a/src/Song.cxx b/src/Song.cxx
new file mode 100644
index 000000000..c845384ae
--- /dev/null
+++ b/src/Song.cxx
@@ -0,0 +1,181 @@
+/*
+ * Copyright (C) 2003-2011 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 "song.h"
+#include "Directory.hxx"
+
+extern "C" {
+#include "tag.h"
+}
+
+#include <glib.h>
+
+#include <assert.h>
+
+Directory detached_root;
+
+static struct song *
+song_alloc(const char *uri, Directory *parent)
+{
+	size_t uri_length;
+
+	assert(uri);
+	uri_length = strlen(uri);
+	assert(uri_length);
+
+	struct song *song = (struct song *)
+		g_malloc(sizeof(*song) - sizeof(song->uri) + uri_length + 1);
+
+	song->tag = nullptr;
+	memcpy(song->uri, uri, uri_length + 1);
+	song->parent = parent;
+	song->mtime = 0;
+	song->start_ms = song->end_ms = 0;
+
+	return song;
+}
+
+struct song *
+song_remote_new(const char *uri)
+{
+	return song_alloc(uri, nullptr);
+}
+
+struct song *
+song_file_new(const char *path, Directory *parent)
+{
+	assert((parent == nullptr) == (*path == '/'));
+
+	return song_alloc(path, parent);
+}
+
+struct song *
+song_replace_uri(struct song *old_song, const char *uri)
+{
+	struct song *new_song = song_alloc(uri, old_song->parent);
+	new_song->tag = old_song->tag;
+	new_song->mtime = old_song->mtime;
+	new_song->start_ms = old_song->start_ms;
+	new_song->end_ms = old_song->end_ms;
+	g_free(old_song);
+	return new_song;
+}
+
+struct song *
+song_detached_new(const char *uri)
+{
+	assert(uri != nullptr);
+
+	return song_alloc(uri, &detached_root);
+}
+
+struct song *
+song_dup_detached(const struct song *src)
+{
+	assert(src != nullptr);
+
+	struct song *song;
+	if (song_in_database(src)) {
+		char *uri = song_get_uri(src);
+		song = song_detached_new(uri);
+		g_free(uri);
+	} else
+		song = song_alloc(src->uri, nullptr);
+
+	song->tag = tag_dup(src->tag);
+	song->mtime = src->mtime;
+	song->start_ms = src->start_ms;
+	song->end_ms = src->end_ms;
+
+	return song;
+}
+
+void
+song_free(struct song *song)
+{
+	if (song->tag)
+		tag_free(song->tag);
+	g_free(song);
+}
+
+gcc_pure
+static inline bool
+directory_equals(const Directory &a, const Directory &b)
+{
+	return strcmp(a.path, b.path) == 0;
+}
+
+gcc_pure
+static inline bool
+directory_is_same(const Directory *a, const Directory *b)
+{
+	return a == b ||
+		(a != nullptr && b != nullptr &&
+		 directory_equals(*a, *b));
+
+}
+
+bool
+song_equals(const struct song *a, const struct song *b)
+{
+	assert(a != nullptr);
+	assert(b != nullptr);
+
+	if (a->parent != nullptr && b->parent != nullptr &&
+	    !directory_equals(*a->parent, *b->parent) &&
+	    (a->parent == &detached_root || b->parent == &detached_root)) {
+		/* must compare the full URI if one of the objects is
+		   "detached" */
+		char *au = song_get_uri(a);
+		char *bu = song_get_uri(b);
+		const bool result = strcmp(au, bu) == 0;
+		g_free(bu);
+		g_free(au);
+		return result;
+	}
+
+	return directory_is_same(a->parent, b->parent) &&
+		strcmp(a->uri, b->uri) == 0;
+}
+
+char *
+song_get_uri(const struct song *song)
+{
+	assert(song != nullptr);
+	assert(*song->uri);
+
+	if (!song_in_database(song) || song->parent->IsRoot())
+		return g_strdup(song->uri);
+	else
+		return g_strconcat(song->parent->GetPath(),
+				   "/", song->uri, nullptr);
+}
+
+double
+song_get_duration(const struct song *song)
+{
+	if (song->end_ms > 0)
+		return (song->end_ms - song->start_ms) / 1000.0;
+
+	if (song->tag == nullptr)
+		return 0;
+
+	return song->tag->time - song->start_ms / 1000.0;
+}