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73 lines
2.6 KiB
C
73 lines
2.6 KiB
C
/***********************************************************
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Copyright 1991, 1992 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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/* Integer object interface */
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/*
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123456789-123456789-123456789-123456789-123456789-123456789-123456789-12
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intobject represents a (long) integer. This is an immutable object;
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an integer cannot change its value after creation.
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There are functions to create new integer objects, to test an object
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for integer-ness, and to get the integer value. The latter functions
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returns -1 and sets errno to EBADF if the object is not an intobject.
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None of the functions should be applied to nil objects.
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The type intobject is (unfortunately) exposed bere so we can declare
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TrueObject and FalseObject below; don't use this.
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*/
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typedef struct {
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OB_HEAD
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long ob_ival;
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} intobject;
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extern typeobject Inttype;
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#define is_intobject(op) ((op)->ob_type == &Inttype)
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extern object *newintobject PROTO((long));
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extern long getintvalue PROTO((object *));
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/*
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123456789-123456789-123456789-123456789-123456789-123456789-123456789-12
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False and True are special intobjects used by Boolean expressions.
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All values of type Boolean must point to either of these; but in
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contexts where integers are required they are integers (valued 0 and 1).
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Hope these macros don't conflict with other people's.
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Don't forget to apply INCREF() when returning True or False!!!
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*/
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extern intobject FalseObject, TrueObject; /* Don't use these directly */
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#define False ((object *) &FalseObject)
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#define True ((object *) &TrueObject)
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/* Macro, trading safety for speed */
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#define GETINTVALUE(op) ((op)->ob_ival)
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