| /* Tuple object interface */ |
| |
| /* |
| 123456789-123456789-123456789-123456789-123456789-123456789-123456789-12 |
| |
| Another generally useful object type is an tuple of object pointers. |
| This is a mutable type: the tuple items can be changed (but not their |
| number). Out-of-range indices or non-tuple objects are ignored. |
| |
| *** WARNING *** settupleitem does not increment the new item's reference |
| count, but does decrement the reference count of the item it replaces, |
| if not nil. It does *decrement* the reference count if it is *not* |
| inserted in the tuple. Similarly, gettupleitem does not increment the |
| returned item's reference count. |
| */ |
| |
| typedef struct { |
| OB_VARHEAD |
| object *ob_item[1]; |
| } tupleobject; |
| |
| extern typeobject Tupletype; |
| |
| #define is_tupleobject(op) ((op)->ob_type == &Tupletype) |
| |
| extern object *newtupleobject PROTO((int size)); |
| extern int gettuplesize PROTO((object *)); |
| extern object *gettupleitem PROTO((object *, int)); |
| extern int settupleitem PROTO((object *, int, object *)); |
| |
| /* Macro, trading safety for speed */ |
| #define GETTUPLEITEM(op, i) ((op)->ob_item[i]) |