Include/structmember.h

/***********************************************************
Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The
Netherlands.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
provided that the above copyright notice appear in all copies and that
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Centrum or CWI not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior permission.

STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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******************************************************************/

/* Interface to map C struct members to Python object attributes */

/* The offsetof() macro calculates the offset of a structure member
   in its structure.  Unfortunately this cannot be written down
   portably, hence it is provided by a Standard C header file.
   For pre-Standard C compilers, here is a version that usually works
   (but watch out!): */

#ifndef offsetof
#define offsetof(type, member) ( (int) & ((type*)0) -> member )
#endif

/* An array of memberlist structures defines the name, type and offset
   of selected members of a C structure.  These can be read by
   getmember() and set by setmember() (except if their READONLY flag
   is set).  The array must be terminated with an entry whose name
   pointer is NULL. */

struct memberlist {
	char *name;
	int type;
	int offset;
	int readonly;
};

/* Types */
#define T_SHORT		0
#define T_INT		1
#define T_LONG		2
#define T_FLOAT		3
#define T_DOUBLE	4
#define T_STRING	5
#define T_OBJECT	6

/* Readonly flag */
#define READONLY	1
#define RO		READONLY		/* Shorthand */

object *getmember PROTO((char *, struct memberlist *, char *));
int setmember PROTO((char *, struct memberlist *, char *, object *));