blob: 2cf68d83576249d3d9b305be015d2d2db99ff88f [file] [log] [blame]
Guido van Rossumf70e43a1991-02-19 12:39:46 +00001/***********************************************************
2Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The
3Netherlands.
4
5 All Rights Reserved
6
7Permission to use, copy, modify, and distribute this software and its
8documentation for any purpose and without fee is hereby granted,
9provided that the above copyright notice appear in all copies and that
10both that copyright notice and this permission notice appear in
11supporting documentation, and that the names of Stichting Mathematisch
12Centrum or CWI not be used in advertising or publicity pertaining to
13distribution of the software without specific, written prior permission.
14
15STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
16THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
17FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
18FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
20ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
21OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22
23******************************************************************/
24
Guido van Rossum3f5da241990-12-20 15:06:42 +000025/* Interface to map C struct members to Python object attributes */
26
27/* The offsetof() macro calculates the offset of a structure member
28 in its structure. Unfortunately this cannot be written down
29 portably, hence it is provided by a Standard C header file.
30 For pre-Standard C compilers, here is a version that usually works
31 (but watch out!): */
32
33#ifndef offsetof
34#define offsetof(type, member) ( (int) & ((type*)0) -> member )
35#endif
36
37/* An array of memberlist structures defines the name, type and offset
38 of selected members of a C structure. These can be read by
39 getmember() and set by setmember() (except if their READONLY flag
40 is set). The array must be terminated with an entry whose name
41 pointer is NULL. */
42
43struct memberlist {
44 char *name;
45 int type;
46 int offset;
47 int readonly;
48};
49
50/* Types */
51#define T_SHORT 0
52#define T_INT 1
53#define T_LONG 2
54#define T_FLOAT 3
55#define T_DOUBLE 4
56#define T_STRING 5
57#define T_OBJECT 6
58
59/* Readonly flag */
60#define READONLY 1
61#define RO READONLY /* Shorthand */
62
63object *getmember PROTO((char *, struct memberlist *, char *));
64int setmember PROTO((char *, struct memberlist *, char *, object *));