From c2e4fe983da690907316dac9cd1838fc713dec1b Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Thu, 9 Aug 2012 21:20:24 +0200
Subject: Song: add function song_equals()

decoder_is_current_song() now recognizes different instances of the
same physical song.
---
 src/Song.cxx | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'src/Song.cxx')

diff --git a/src/Song.cxx b/src/Song.cxx
index 006ef8aaa..3dfdc0c74 100644
--- a/src/Song.cxx
+++ b/src/Song.cxx
@@ -84,6 +84,33 @@ song_free(struct song *song)
 	g_free(song);
 }
 
+gcc_pure
+static inline bool
+directory_equals(const struct directory &a, const struct directory &b)
+{
+	return strcmp(a.path, b.path) == 0;
+}
+
+gcc_pure
+static inline bool
+directory_is_same(const struct directory *a, const struct 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);
+
+	return directory_is_same(a->parent, b->parent) &&
+		strcmp(a->uri, b->uri) == 0;
+}
+
 char *
 song_get_uri(const struct song *song)
 {
-- 
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