Feature enabled/disabled

eccodes_config.h.in

@@ -115,6 +115,7 @@
 
 #cmakedefine HAVE_GEOGRAPHY
 #cmakedefine HAVE_MEMFS
+#cmakedefine HAVE_FORTRAN
 
 #ifdef HAVE_MEMFS
 #undef ECCODES_DEFINITION_PATH

src/codes_util.cc

@@ -404,3 +404,72 @@ int compute_scaled_value_and_scale_factor(
     }
     return err;
 }
+
+int codes_is_feature_enabled(const char* feature)
+{
+    int aec_enabled = 0;
+    int jpg_enabled = 0; // JasPer and/or OpenJPEG
+    int png_enabled = 0;
+    int memfs_enabled = 0;
+    int posix_threads_enabled = 0;
+    int omp_threads_enabled = 0;
+    int netcdf_enabled = 0;
+    int fortran_enabled = 0;
+
+#if defined(HAVE_LIBAEC) || defined(HAVE_AEC)
+    aec_enabled = 1;
+#endif
+#if HAVE_JPEG
+    #if HAVE_LIBJASPER
+        jpg_enabled = 1;
+    #endif
+    #if HAVE_LIBOPENJPEG
+        jpg_enabled = 1;
+    #endif
+#endif
+#if defined(HAVE_LIBPNG)
+    png_enabled = 1;
+#endif
+#if defined(HAVE_MEMFS)
+    memfs_enabled = 1;
+#endif
+#if GRIB_PTHREADS
+    posix_threads_enabled = 1;
+#endif
+#if GRIB_OMP_THREADS
+    omp_threads_enabled= 1;
+#endif
+#if defined(HAVE_NETCDF)
+    netcdf_enabled = 1;
+#endif
+#if defined(HAVE_FORTRAN)
+    fortran_enabled = 1;
+#endif
+
+    if (STR_EQUAL(feature, "AEC") || STR_EQUAL(feature, "CCSDS")) {
+        return aec_enabled;
+    }
+    if (STR_EQUAL(feature, "JPG") || STR_EQUAL(feature, "JPEG")) {
+        return jpg_enabled;
+    }
+    if (STR_EQUAL(feature, "PNG")) {
+        return png_enabled;
+    }
+    if (STR_EQUAL(feature, "MEMFS")) {
+        return memfs_enabled;
+    }
+    if (STR_EQUAL(feature, "ECCODES_THREADS")) {
+        return posix_threads_enabled;
+    }
+    if (STR_EQUAL(feature, "ECCODES_OMP_THREADS")) {
+        return omp_threads_enabled;
+    }
+    if (STR_EQUAL(feature, "NETCDF")) {
+        return netcdf_enabled;
+    }
+    if (STR_EQUAL(feature, "FORTRAN")) {
+        return fortran_enabled;
+    }
+
+    return 0;
+}

src/eccodes.h

@@ -1400,6 +1400,9 @@ int codes_get_product_kind(const codes_handle* h, ProductKind* product_kind);
 int codes_check_message_header(const void* bytes, size_t length, ProductKind product);
 int codes_check_message_footer(const void* bytes, size_t length, ProductKind product);
 
+/* Features enabled */
+int codes_is_feature_enabled(const char* feature);
+
 
 /* --------------------------------------- */
 #define CODES_UTIL_GRID_SPEC_REGULAR_LL                   GRIB_UTIL_GRID_SPEC_REGULAR_LL

src/eccodes_prototypes.h

@@ -857,6 +857,7 @@ long convert_to_minutes(long step, long stepUnits);
 bool is_sorted_ascending(double arr[], size_t n);
 bool is_sorted_descending(double arr[], size_t n);
 int compute_scaled_value_and_scale_factor(double input, int64_t scaled_value_max, int64_t scale_factor_max, int64_t* ret_value, int64_t* ret_factor);
+int codes_is_feature_enabled(const char* feature);
 
 /* grib_util.cc */
 grib_handle* grib_util_sections_copy(grib_handle* hfrom, grib_handle* hto, int what, int* err);

tests/unit_tests.cc

@@ -282,6 +282,7 @@ static void test_concept_condition_strings()
     char result[1024] = {0,};
     grib_context* context = NULL;
     grib_handle* h = grib_handle_new_from_samples(context, "GRIB2");
+    if (!h) return;
 
     err = get_concept_condition_string(h, "typeOfLevel", NULL, result);
     Assert(!err);
@@ -762,6 +763,7 @@ void test_codes_context_set_debug()
     grib_context_set_debug(context, -1);
 
     grib_handle* h = grib_handle_new_from_samples(context, "GRIB2");
+    if (!h) return;
     err = grib_set_long(h, "paramId", 167);
     Assert(!err);
 
@@ -777,6 +779,27 @@ void test_codes_context_set_debug()
     grib_context_set_debug(context, 0);
 }
 
+void test_is_feature_enabled()
+{
+    printf("Running %s ...\n", __func__);
+    const char* features[] = {
+        "AEC",
+        "MEMFS",
+        "JPG",
+        "PNG",
+        "ECCODES_THREADS",
+        "ECCODES_OMP_THREADS",
+        "NETCDF",
+        "non-existent-feature",
+        "FORTRAN",
+        NULL};
+    for (int i = 0; features[i]; ++i) {
+        const char* f = features[i];
+        printf("\tFeature %s enabled?\t%d\n", f, codes_is_feature_enabled(f));
+    }
+}
+
+
 int main(int argc, char** argv)
 {
     printf("Doing unit tests. ecCodes version = %ld\n", grib_get_api_version());
@@ -841,6 +864,7 @@ int main(int argc, char** argv)
 
     test_grib2_select_PDTN();
     test_grib2_choose_PDTN();
+    test_is_feature_enabled();
 
     return 0;
 }