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81 lines
2.6 KiB
81 lines
2.6 KiB
#ifndef __CLASS_H__
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#define __CLASS_H__
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#include <stdarg.h>
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#include <sys/types.h>
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#include <string.h>
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#include <assert.h>
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#include "interface.h"
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#define _ISOC99_SOURCE
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#define CLASS_MAGIC 0xFEFE
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#define CLASS(name) \
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struct c_##name; \
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typedef struct c_##name * name; \
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extern struct class * const _##name; \
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struct c_##name
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#define EXTENDS(parent) \
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const char _[sizeof(struct c_##parent)]
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#define _NULL NULL
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#define CREATE_CLASS(name,_parent,...) \
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static struct class c_##name; \
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static void _classInit_(void) { \
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c_##name.parent = _##_parent; \
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c_##name.init = NULL; \
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} \
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static struct class c_##name = { \
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CLASS_MAGIC, \
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NULL, \
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sizeof(struct c_##name), \
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_classInit_, \
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INIT_IMPL(__VA_ARGS__) \
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}; struct class * const _##name = &c_##name
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/**
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* @TODO: actually i use gcc feature ## for variadoc... think about
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* a way to make this standard.
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*/
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#define CALL(object,_iface,method,...) \
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do { \
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class_ptr class = class_getClass((object)); \
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struct i_##_iface * iface; \
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if (class->init) class->init(); \
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iface = (struct i_##_iface *)class_getInterface(&class, &i_##_iface); \
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while ((NULL == iface || NULL == iface->method) && HAS_PARENT(class)) { \
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class = class->parent; \
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if (class->init) class->init(); \
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iface = (struct i_##_iface *)class_getInterface(&class, &i_##_iface); \
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}; \
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assert(NULL != iface->method); \
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iface->method(object, ##__VA_ARGS__); \
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} while(0)
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#define IFACE_GET(class,iface) (interfaceGet(&((class)->impl),(iface)))
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#define IFACE_EXISTS(class,iface) (NULL != IFACE_GET((class),(iface)))
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#define HAS_PARENT(class) (NULL != ((class)->parent))
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typedef void (* fptr_classInit)(void);
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struct class;
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typedef struct class * class_ptr;
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struct class {
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const int magic;
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class_ptr parent;
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size_t object_size;
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fptr_classInit init;
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struct iface_impl impl;
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};
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extern inline void * class_getInterface(class_ptr *, iface_ptr);
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extern inline class_ptr class_getClass(void *);
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#endif // __CLASS_H__
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// vim: set ts=4 sw=4:
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