diff options
| -rw-r--r-- | scripts/reference_exported_symbols.txt | 1 | ||||
| -rw-r--r-- | src/iso19111/c_api.cpp | 23 | ||||
| -rw-r--r-- | src/proj.h | 2 | ||||
| -rw-r--r-- | test/unit/test_c_api.cpp | 26 |
4 files changed, 52 insertions, 0 deletions
diff --git a/scripts/reference_exported_symbols.txt b/scripts/reference_exported_symbols.txt index a5fd41ca..42c7e43e 100644 --- a/scripts/reference_exported_symbols.txt +++ b/scripts/reference_exported_symbols.txt @@ -928,6 +928,7 @@ proj_crs_get_geodetic_crs proj_crs_get_horizontal_datum proj_crs_get_sub_crs proj_crs_info_list_destroy +proj_crs_is_derived proj_crs_promote_to_3D proj_cs_get_axis_count proj_cs_get_axis_info diff --git a/src/iso19111/c_api.cpp b/src/iso19111/c_api.cpp index cb0c113a..ae13b40d 100644 --- a/src/iso19111/c_api.cpp +++ b/src/iso19111/c_api.cpp @@ -1840,6 +1840,29 @@ PJ *proj_crs_get_geodetic_crs(PJ_CONTEXT *ctx, const PJ *crs) { // --------------------------------------------------------------------------- +/** \brief Returns whether a CRS is a derived CRS. + * + * @param ctx PROJ context, or NULL for default context + * @param crs Object of type CRS (must not be NULL) + * @return TRUE if the CRS is a derived CRS. + * @since 8.0 + */ +int proj_crs_is_derived(PJ_CONTEXT *ctx, const PJ *crs) { + if (!crs) { + proj_context_errno_set(ctx, PROJ_ERR_OTHER_API_MISUSE); + proj_log_error(ctx, __FUNCTION__, "missing required input"); + return false; + } + auto l_crs = dynamic_cast<const CRS *>(crs->iso_obj.get()); + if (!l_crs) { + proj_log_error(ctx, __FUNCTION__, "Object is not a CRS"); + return false; + } + return dynamic_cast<const DerivedCRS *>(l_crs) != nullptr; +} + +// --------------------------------------------------------------------------- + /** \brief Get a CRS component from a CompoundCRS * * The returned object must be unreferenced with proj_destroy() after @@ -1271,6 +1271,8 @@ int PROJ_DLL proj_get_suggested_operation(PJ_CONTEXT *ctx, /* ------------------------------------------------------------------------- */ +int PROJ_DLL proj_crs_is_derived(PJ_CONTEXT *ctx, const PJ *crs); + PJ PROJ_DLL *proj_crs_get_geodetic_crs(PJ_CONTEXT *ctx, const PJ *crs); PJ PROJ_DLL *proj_crs_get_horizontal_datum(PJ_CONTEXT *ctx, const PJ *crs); diff --git a/test/unit/test_c_api.cpp b/test/unit/test_c_api.cpp index d43d68ce..60ad8f61 100644 --- a/test/unit/test_c_api.cpp +++ b/test/unit/test_c_api.cpp @@ -5183,4 +5183,30 @@ TEST_F(CApi, datum_ensemble) { } } +// --------------------------------------------------------------------------- + +TEST_F(CApi, proj_crs_is_derived) { + { + auto wkt = + createProjectedCRS()->exportToWKT(WKTFormatter::create().get()); + auto obj = proj_create_from_wkt(m_ctxt, wkt.c_str(), nullptr, nullptr, + nullptr); + ObjectKeeper keeper(obj); + ASSERT_NE(obj, nullptr) << wkt; + + EXPECT_TRUE(proj_crs_is_derived(m_ctxt, obj)); + } + + { + auto wkt = createProjectedCRS()->baseCRS()->exportToWKT( + WKTFormatter::create().get()); + auto obj = proj_create_from_wkt(m_ctxt, wkt.c_str(), nullptr, nullptr, + nullptr); + ObjectKeeper keeper(obj); + ASSERT_NE(obj, nullptr) << wkt; + + EXPECT_FALSE(proj_crs_is_derived(m_ctxt, obj)); + } +} + } // namespace |