Curve: Add functions to retrieve const access to spline list

While the const correctness of `ListBase` is quite limited, it's helpful
to have a way to retrieve the `Nurb` list from curve object data without
casting away const from the curve.

1 files changed, 2 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_curve.h b/source/blender/blenkernel/BKE_curve.h
index 76a0468df03..c7c5f59cab2 100644
--- a/source/blender/blenkernel/BKE_curve.h
+++ b/source/blender/blenkernel/BKE_curve.h
@@ -121,6 +121,7 @@ void BKE_curve_material_remap(struct Curve *cu, const unsigned int *remap, unsig
 void BKE_curve_smooth_flag_set(struct Curve *cu, const bool use_smooth);
 
 ListBase *BKE_curve_nurbs_get(struct Curve *cu);
+const ListBase *BKE_curve_nurbs_get_for_read(const struct Curve *cu);
 
 int BKE_curve_nurb_vert_index_get(const struct Nurb *nu, const void *vert);
 void BKE_curve_nurb_active_set(struct Curve *cu, const struct Nurb *nu);
@@ -153,6 +154,7 @@ void BKE_curve_editNurb_keyIndex_delCV(struct GHash *keyindex, const void *cv);
 void BKE_curve_editNurb_keyIndex_free(struct GHash **keyindex);
 void BKE_curve_editNurb_free(struct Curve *cu);
 struct ListBase *BKE_curve_editNurbs_get(struct Curve *cu);
+const struct ListBase *BKE_curve_editNurbs_get_for_read(const struct Curve *cu);
 
 void BKE_curve_bevelList_free(struct ListBase *bev);
 void BKE_curve_bevelList_make(struct Object *ob, const struct ListBase *nurbs, bool for_render);