Function modify_unit_components

src/resource/unit_compiler.cpp:852–944

	}

	s32 modify_unit_components(Unit *unit, const char *unit_json, CompileOptions &opts)
	{
		TempAllocator4096 ta;
		JsonObject obj(ta);
		RETURN_IF_ERROR(sjson::parse(obj, unit_json));

		if (json_object::has(obj, "components")) {
			JsonArray components(ta);
			RETURN_IF_ERROR(sjson::parse_array(components, obj["components"]));

			// Add components.
			for (u32 cc = 0; cc < array::size(components); ++cc) {
				FlatJsonObject flat_comp(default_allocator());
				DynamicString empty(default_allocator());
				to_flat(flat_comp, components[cc], empty);

				array::push_back(unit->_merged_components, components[cc]);
				vector::push_back(unit->_flattened_components, flat_comp);
			}
		}

		if (json_object::has(obj, "deleted_components")) {
			JsonObject deleted_components(ta);
			RETURN_IF_ERROR(sjson::parse_object(deleted_components, obj["deleted_components"]));

			// Delete components.
			auto cur = json_object::begin(deleted_components);
			auto end = json_object::end(deleted_components);
			for (; cur != end; ++cur) {
				JSON_OBJECT_SKIP_HOLE(deleted_components, cur);

				auto key = cur->first;

				// Extract GUID from key "#xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx".
				char guid[37];
				strncpy(guid, key.data() + 1, sizeof(guid) - 1);
				guid[36] = '\0';
				Guid component_id = guid::parse(guid);

				u32 comp_idx = object_index(unit->_merged_components, component_id, opts);
				if (comp_idx != UINT32_MAX) {
					u32 comp_last = array::size(unit->_merged_components) - 1;
					if (comp_idx != comp_last) {
						unit->_merged_components[comp_idx] = unit->_merged_components[comp_last];
						unit->_flattened_components[comp_idx] = unit->_flattened_components[comp_last];
					}
					array::pop_back(unit->_merged_components);
					vector::pop_back(unit->_flattened_components);
				} else {
					char buf[GUID_BUF_LEN];
					RETURN_IF_FALSE(UNIT_COMPILER, false
						, opts
						, "Deletion of unexisting component ID: %s"
						, guid::to_string(buf, sizeof(buf), component_id)
						);
				}
			}
		}