From bb04c6342e692b39d04126940570a5ade9ca371a Mon Sep 17 00:00:00 2001
From: Eric Wong <normalperson@yhbt.net>
Date: Tue, 7 Oct 2008 22:07:29 +0200
Subject: songvec: add songvec_for_each iterator

This is so we can more consistently deal with locking
needed for thread-safety in iterator functions.
---
 src/songvec.c | 13 +++++++++++++
 src/songvec.h |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/src/songvec.c b/src/songvec.c
index 8e3b9b955..dd188f46c 100644
--- a/src/songvec.c
+++ b/src/songvec.c
@@ -66,3 +66,16 @@ void songvec_destroy(struct songvec *sv)
 	}
 	sv->nr = 0;
 }
+
+int songvec_for_each(struct songvec *sv, int (*fn)(Song *, void *), void *arg)
+{
+	int i;
+	Song **sp = sv->base;
+
+	for (i = sv->nr; --i >= 0; ) {
+		if (fn(*sp++, arg) < 0)
+			return -1;
+	}
+
+	return 0;
+}
diff --git a/src/songvec.h b/src/songvec.h
index 47b5ea6c0..dbe6be508 100644
--- a/src/songvec.h
+++ b/src/songvec.h
@@ -19,4 +19,6 @@ void songvec_add(struct songvec *sv, Song *add);
 
 void songvec_destroy(struct songvec *sv);
 
+int songvec_for_each(struct songvec *sv, int (*fn)(Song *, void *), void *arg);
+
 #endif /* SONGVEC_H */
-- 
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