cpython/Include/structmember.h

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1990-12-20 11:06:42 -04:00
/* 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 *));