enum
{
TYPE_VEHICLE = 0x0002,
TYPE_STRUCTURE = 0x0040
};
int main(int argc, char* argv[])
{
size_t vehicle_id = TYPE_VEHICLE | 0;
size_t structure_id = TYPE_STRUCTURE | 0;
size_t another_vehicle_id = TYPE_VEHICLE | 1;
size_t another_structure_id = TYPE_STRUCTURE | 1;
return 0;
}
enum
{
TYPE_VEHICLE = 0x0001,
TYPE_STRUCTURE = 0x0002
};
enum{ TYPE_VEHICLE = 0x0100, TYPE_STRUCTURE = 0x0200, ... TYPE_LAST = 0xFF00};int main(int arg_count, char** args){ size_t vehicle_id = TYPE_VEHICLE | 0; // id = 0x0100 size_t structure_id = TYPE_STRUCTURE | 0; // id = 0x0200 size_t another_vehicle_id = TYPE_VEHICLE | 1; // id = 0x0101 size_t another_structure_id = TYPE_STRUCTURE | 1; // id = 0x0201 size_t last_vehicle_id = TYPE_VEHICLE | 255; // id = 0x01FF size_t last_structure_id = TYPE_STRUCTURE | 255; // id = 0x02FF return 0;}Quote:Original post by Wavarian
If you really wanted to do this, I would suggest that you reserve the high order bits for the type, and the low order bits for the ID.
From your example it seems like you want to use short values, which will allow you to have a maximum of 256 objects of each type:
*** Source Snippet Removed ***
Just be sure that you don't have more than 256 objects and you can do this fine, otherwise use unsigned integers instead.
enum{ TYPE_FIRST = 0x00000000, TYPE_VEHICLE = 0x01000000, TYPE_STRUCTURE = 0x02000000, ... TYPE_LAST = 0xFF000000};int main(int arg_count, char** args){ size_t vehicle_id = TYPE_VEHICLE | 0; // id = 0x01000000 size_t structure_id = TYPE_STRUCTURE | 0; // id = 0x02000000 size_t another_vehicle_id = TYPE_VEHICLE | 1; // id = 0x01000001 size_t another_structure_id = TYPE_STRUCTURE | 1; // id = 0x02000001 size_t last_vehicle_id = TYPE_VEHICLE | 16777215; // id = 0x01FFFFFF size_t last_structure_id = TYPE_STRUCTURE | 16777215; // id = 0x02FFFFFF return 0;}enum{ TYPE_VEHICLE = 0x01000000, TYPE_STRUCTURE = 0x02000000};
