From 06932304140a75a65b6eb3f68939e50a36e2398d Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Sun, 18 Oct 2009 02:20:11 +0200
Subject: [PATCH] playlist: added function playlist_move()

---
 src/playlist.c | 26 ++++++++++++++++++++++++++
 src/playlist.h |  4 ++++
 2 files changed, 30 insertions(+)

diff --git a/src/playlist.c b/src/playlist.c
index dfe9cad..2ce7ae2 100644
--- a/src/playlist.c
+++ b/src/playlist.c
@@ -65,6 +65,32 @@ playlist_get_song(const struct mpdclient_playlist *playlist, gint idx)
 	return playlist_get(playlist, idx);
 }
 
+void
+playlist_move(struct mpdclient_playlist *playlist,
+	      unsigned dest, unsigned src)
+{
+	struct mpd_song *song;
+
+	assert(playlist != NULL);
+	assert(src < playlist_length(playlist));
+	assert(dest < playlist_length(playlist));
+	assert(src != dest);
+
+	song = playlist_get(playlist, src);
+
+	if (src < dest) {
+		memmove(&playlist->list->pdata[src],
+			&playlist->list->pdata[src + 1],
+			sizeof(playlist->list->pdata[0]) * (dest - src));
+		playlist->list->pdata[dest] = song;
+	} else {
+		memmove(&playlist->list->pdata[dest + 1],
+			&playlist->list->pdata[dest],
+			sizeof(playlist->list->pdata[0]) * (src - dest));
+		playlist->list->pdata[dest] = song;
+	}
+}
+
 const struct mpd_song *
 playlist_lookup_song(const struct mpdclient_playlist *playlist, unsigned id)
 {
diff --git a/src/playlist.h b/src/playlist.h
index 4504688..8768b9e 100644
--- a/src/playlist.h
+++ b/src/playlist.h
@@ -113,6 +113,10 @@ playlist_swap(struct mpdclient_playlist *playlist, guint idx1, guint idx2)
 	g_ptr_array_index(playlist->list, idx2) = song1;
 }
 
+void
+playlist_move(struct mpdclient_playlist *playlist,
+	      unsigned dest, unsigned src);
+
 const struct mpd_song *
 playlist_lookup_song(const struct mpdclient_playlist *playlist, unsigned id);
 
-- 
2.30.2