Object Oriented Programming in ANSI C. Basic example showing how OOP can be realized on ANSI C for Figure class.
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#ifndef __FIGURE_H__
#define __FIGURE_H__
#include "Object.h"
typedef struct Figure
{
struct Figure_vtable
{
/* derived from Object */
const char* (*type) ();
struct Figure* (*clone) (const struct Figure *this);
void (*destroy) (struct Figure *this);
/* Figure virtual methods */
void (*draw) (const struct Figure *this);
double (*area) (const struct Figure *this);
} *vtable;
} Figure;
static inline const char* Figure_type (const Figure *this)
{
return this->vtable->type ();
}
static inline Figure* Figure_clone (const Figure *this)
{
return this->vtable->clone (this);
}
static inline void Figure_destroy (Figure *this)
{
this->vtable->destroy (this);
}
static inline void Figure_draw (const Figure *this)
{
this->vtable->draw (this);
}
static inline double Figure_area (const Figure *this)
{
return this->vtable->area (this);
}
/* considered to be protected */
void Figure_constructor (Figure *this);
void Figure_destructor (Figure *this);
void Figure_copy (Figure *dest, const Figure *src);
#endif // __FIGURE_H__