+
+/**
+ * gras_datadesc_type_cmp:
+ *
+ * Compares two datadesc types with the same semantic than strcmp.
+ *
+ * This comparison does not take the set headers into account (name and ID),
+ * but only the payload (actual type description).
+ */
+int gras_datadesc_type_cmp(const gras_datadesc_type_t d1,
+ const gras_datadesc_type_t d2) {
+ int ret,cpt;
+ gras_dd_cat_field_t field1,field2;
+ gras_datadesc_type_t field_desc_1,field_desc_2;
+
+ if (d1 == d2) return 0; /* easy optimization */
+
+ if (!d1 && d2) {
+ DEBUG0("ddt_cmp: !d1 && d2 => 1");
+ return 1;
+ }
+ if (!d1 && !d2) {
+ DEBUG0("ddt_cmp: !d1 && !d2 => 0");
+ return 0;
+ }
+ if ( d1 && !d2) {
+ DEBUG0("ddt_cmp: d1 && !d2 => -1");
+ return -1;
+ }
+
+ for (cpt=0; cpt<gras_arch_count; cpt++) {
+ if (d1->size[cpt] != d2->size[cpt]) {
+ DEBUG5("ddt_cmp: %s->size=%ld != %s->size=%ld (on %s)",
+ d1->name,d1->size[cpt],d2->name,d2->size[cpt],
+ gras_arches[cpt].name);
+ return d1->size[cpt] > d2->size[cpt] ? 1 : -1;
+ }
+
+ if (d1->alignment[cpt] != d2->alignment[cpt]) {
+ DEBUG5("ddt_cmp: %s->alignment=%ld != %s->alignment=%ld (on %s)",
+ d1->name,d1->alignment[cpt],d2->name,d2->alignment[cpt],
+ gras_arches[cpt].name);
+ return d1->alignment[cpt] > d2->alignment[cpt] ? 1 : -1;
+ }
+
+ if (d1->aligned_size[cpt] != d2->aligned_size[cpt]) {
+ DEBUG5("ddt_cmp: %s->aligned_size=%ld != %s->aligned_size=%ld (on %s)",
+ d1->name,d1->aligned_size[cpt],d2->name,d2->aligned_size[cpt],
+ gras_arches[cpt].name);
+ return d1->aligned_size[cpt] > d2->aligned_size[cpt] ? 1 : -1;
+ }
+ }
+
+ if (d1->category_code != d2->category_code) {
+ DEBUG4("ddt_cmp: %s->cat=%s != %s->cat=%s",
+ d1->name,gras_datadesc_cat_names[d1->category_code],
+ d2->name,gras_datadesc_cat_names[d2->category_code]);
+ return d1->category_code > d2->category_code ? 1 : -1;
+ }
+
+ if (d1->send != d2->send) {
+ DEBUG4("ddt_cmp: %s->send=%p != %s->send=%p",
+ d1->name,(void*)d1->send, d2->name,(void*)d2->send);
+ return 1; /* ISO C forbids ordered comparisons of pointers to functions */
+ }
+
+ if (d1->recv != d2->recv) {
+ DEBUG4("ddt_cmp: %s->recv=%p != %s->recv=%p",
+ d1->name,(void*)d1->recv, d2->name,(void*)d2->recv);
+ return 1; /* ISO C forbids ordered comparisons of pointers to functions */
+ }
+
+ switch (d1->category_code) {
+ case e_gras_datadesc_type_cat_scalar:
+ if (d1->category.scalar_data.encoding != d2->category.scalar_data.encoding)
+ return d1->category.scalar_data.encoding > d2->category.scalar_data.encoding ? 1 : -1 ;
+ break;
+
+ case e_gras_datadesc_type_cat_struct:
+ if (xbt_dynar_length(d1->category.struct_data.fields) !=
+ xbt_dynar_length(d2->category.struct_data.fields)) {
+ DEBUG4("ddt_cmp: %s (having %lu fields) != %s (having %lu fields)",
+ d1->name, xbt_dynar_length(d1->category.struct_data.fields),
+ d2->name, xbt_dynar_length(d2->category.struct_data.fields));
+
+ return xbt_dynar_length(d1->category.struct_data.fields) >
+ xbt_dynar_length(d2->category.struct_data.fields) ?
+ 1 : -1;
+ }
+ xbt_dynar_foreach(d1->category.struct_data.fields, cpt, field1) {
+
+ field2 = xbt_dynar_get_as(d2->category.struct_data.fields, cpt, gras_dd_cat_field_t);
+ field_desc_1 = field1->type;
+ field_desc_2 = field2->type;
+ ret = gras_datadesc_type_cmp(field_desc_1,field_desc_2);
+ if (ret) {
+ DEBUG6("%s->field[%d]=%s != %s->field[%d]=%s",
+ d1->name,cpt,field1->name,
+ d2->name,cpt,field2->name);
+ return ret;
+ }
+
+ }
+ break;
+
+ case e_gras_datadesc_type_cat_union:
+ if (d1->category.union_data.selector != d2->category.union_data.selector)
+ return 1; /* ISO C forbids ordered comparisons of pointers to functions */
+
+ if (xbt_dynar_length(d1->category.union_data.fields) !=
+ xbt_dynar_length(d2->category.union_data.fields))
+ return xbt_dynar_length(d1->category.union_data.fields) >
+ xbt_dynar_length(d2->category.union_data.fields) ?
+ 1 : -1;
+
+ xbt_dynar_foreach(d1->category.union_data.fields, cpt, field1) {
+
+ field2 = xbt_dynar_get_as(d2->category.union_data.fields, cpt, gras_dd_cat_field_t);
+ field_desc_1 = field1->type;
+ field_desc_2 = field2->type;
+ ret = gras_datadesc_type_cmp(field_desc_1,field_desc_2);
+ if (ret)
+ return ret;
+
+ }
+ break;
+
+
+ case e_gras_datadesc_type_cat_ref:
+ if (d1->category.ref_data.selector != d2->category.ref_data.selector)
+ return 1; /* ISO C forbids ordered comparisons of pointers to functions */
+
+ if (d1->category.ref_data.type != d2->category.ref_data.type)
+ return d1->category.ref_data.type > d2->category.ref_data.type ? 1 : -1;
+ break;
+
+ case e_gras_datadesc_type_cat_array:
+ if (d1->category.array_data.type != d2->category.array_data.type)
+ return d1->category.array_data.type > d2->category.array_data.type ? 1 : -1;
+
+ if (d1->category.array_data.fixed_size != d2->category.array_data.fixed_size)
+ return d1->category.array_data.fixed_size > d2->category.array_data.fixed_size ? 1 : -1;
+
+ if (d1->category.array_data.dynamic_size != d2->category.array_data.dynamic_size)
+ return 1; /* ISO C forbids ordered comparisons of pointers to functions */
+
+ break;
+
+ case e_gras_datadesc_type_cat_ignored:
+ /* That's ignored... */
+ default:
+ /* two stupidly created ddt are equally stupid ;) */
+ break;
+ }
+ return 0;
+
+}
