ipa: libipa: pwl: Add a size() function

Add a size() function to the Pwl class to return the number of points in
the piecewise linear function. This is useful, for instance, to validate
that all points added with append() or prepend() have been taken into
account.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/ipa/libipa/pwl.h b/src/ipa/libipa/pwl.h
index b4de00cf..02834231 100644
--- a/src/ipa/libipa/pwl.h
+++ b/src/ipa/libipa/pwl.h
@@ -52,6 +52,8 @@ public:
 	void append(double x, double y, double eps = 1e-6);
 
 	bool empty() const { return points_.empty(); }
+	size_t size() const { return points_.size(); }
+
 	Interval domain() const;
 	Interval range() const;