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57 lines
2.2 KiB
C
57 lines
2.2 KiB
C
/***********************************************************
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Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The
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Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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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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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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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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/* Macro, trading safety for speed */
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#define GETTUPLEITEM(op, i) ((op)->ob_item[i])
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