Add C API to work with datum ensemble

Add:
- proj_crs_get_datum_ensemble()
- proj_crs_get_datum_forced()
- proj_datum_ensemble_get_member_count()
- proj_datum_ensemble_get_accuracy()
- proj_datum_ensemble_get_member()

Make proj_create_geographic_crs_from_datum() and
proj_create_geocentric_crs_from_datum() accept a datum ensemble.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/proj.h b/src/proj.h
index 512dcd84..92966526 100644
--- a/src/proj.h
+++ b/src/proj.h
@@ -1249,6 +1249,20 @@ PJ PROJ_DLL *proj_crs_get_sub_crs(PJ_CONTEXT *ctx, const PJ *crs, int index);
 
 PJ PROJ_DLL *proj_crs_get_datum(PJ_CONTEXT *ctx, const PJ *crs);
 
+PJ PROJ_DLL *proj_crs_get_datum_ensemble(PJ_CONTEXT *ctx, const PJ *crs);
+
+PJ PROJ_DLL *proj_crs_get_datum_forced(PJ_CONTEXT *ctx, const PJ *crs);
+
+int PROJ_DLL proj_datum_ensemble_get_member_count(PJ_CONTEXT *ctx,
+                                                  const PJ *datum_ensemble);
+
+double PROJ_DLL proj_datum_ensemble_get_accuracy(PJ_CONTEXT *ctx,
+                                                 const PJ *datum_ensemble);
+
+PJ PROJ_DLL *proj_datum_ensemble_get_member(PJ_CONTEXT *ctx,
+                                            const PJ *datum_ensemble,
+                                            int member_index);
+
 PJ PROJ_DLL *proj_crs_get_coordinate_system(PJ_CONTEXT *ctx, const PJ *crs);
 
 PJ_COORDINATE_SYSTEM_TYPE PROJ_DLL proj_cs_get_type(PJ_CONTEXT *ctx,