| /* List object interface */ |
| |
| /* |
| 123456789-123456789-123456789-123456789-123456789-123456789-123456789-12 |
| |
| Another generally useful object type is an list of object pointers. |
| This is a mutable type: the list items can be changed, and items can be |
| added or removed. Out-of-range indices or non-list objects are ignored. |
| |
| *** WARNING *** setlistitem 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 list. Similarly, getlistitem does not increment the |
| returned item's reference count. |
| */ |
| |
| typedef struct { |
| OB_VARHEAD |
| object **ob_item; |
| } listobject; |
| |
| extern typeobject Listtype; |
| |
| #define is_listobject(op) ((op)->ob_type == &Listtype) |
| |
| extern object *newlistobject PROTO((int size)); |
| extern int getlistsize PROTO((object *)); |
| extern object *getlistitem PROTO((object *, int)); |
| extern int setlistitem PROTO((object *, int, object *)); |
| extern int inslistitem PROTO((object *, int, object *)); |
| extern int addlistitem PROTO((object *, object *)); |
| extern int sortlist PROTO((object *)); |
| |
| /* Macro, trading safety for speed */ |
| #define GETLISTITEM(op, i) ((op)->ob_item[i]) |