1990-10-14 13:07:46 +01:00
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/* Tuple object interface */
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/*
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123456789-123456789-123456789-123456789-123456789-123456789-123456789-12
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Another generally useful object type is an tuple of object pointers.
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This is a mutable type: the tuple items can be changed (but not their
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number). Out-of-range indices or non-tuple objects are ignored.
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*** WARNING *** settupleitem does not increment the new item's reference
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count, but does decrement the reference count of the item it replaces,
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if not nil. It does *decrement* the reference count if it is *not*
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inserted in the tuple. Similarly, gettupleitem does not increment the
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returned item's reference count.
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*/
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1990-12-20 16:06:42 +01:00
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typedef struct {
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OB_VARHEAD
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object *ob_item[1];
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} tupleobject;
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1990-10-14 13:07:46 +01:00
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extern typeobject Tupletype;
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#define is_tupleobject(op) ((op)->ob_type == &Tupletype)
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extern object *newtupleobject PROTO((int size));
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extern int gettuplesize PROTO((object *));
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extern object *gettupleitem PROTO((object *, int));
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extern int settupleitem PROTO((object *, int, object *));
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1990-12-20 16:06:42 +01:00
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/* Macro, trading safety for speed */
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#define GETTUPLEITEM(op, i) ((op)->ob_item[i])
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