#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "object.h"
#include <assert.h>
void Object_destroy(void *self)
{
Object *obj = self;
if(obj) {
if(obj->description) free(obj->description);
free(obj);
}
}
void Object_describe(void *self)
{
Object *obj = self;
printf("%s.\n", obj->description);
}
int Object_init(void *self)
{
// do nothing really
return 1;
}
void *Object_move(void *self, Direction direction)
{
printf("You can't go that direction.\n");
return NULL;
}
int Object_attack(void *self, int damage)
{
printf("You can't attack that.\n");
return 0;
}
void *Object_new(size_t size, Object proto, char *description)
{
// setup the default functions in case they aren't set
if(!proto.init) proto.init = Object_init;
if(!proto.describe) proto.describe = Object_describe;
if(!proto.destroy) proto.destroy = Object_destroy;
if(!proto.destroy) proto.destroy = Object_destroy;
if(!proto.attack) proto.attack = Object_attack;
if(!proto.move) proto.move = Object_move;
// this seems weird, but we can make a struct of one size,
// then point a different pointer at it to "cast" it
Object *el = calloc(1, size);
*el = proto;
// copy the description over
el->description = strdup(description);
// initialize it with whatever init we were given
if(!el->init(el)) {
// looks like it didn't initialize properly
el->destroy(el);
return NULL;
} else {
// all done, we made an object of any type
return el;
}
}typedef enum {
NORTH, SOUTH, EAST, WEST
} Direction;
typedef struct {
char *description;
int (*init)(void *self);
void (*describe)(void *self);
void (*destroy)(void *self);
void *(*move)(void *self, Direction direction);
int (*attack)(void *self, int damage);
} Object;
int Object_init(void *self);
void Object_destroy(void *self);
void Object_describe(void *self);
void *Object_move(void *self, Direction direction);
int Object_attack(void *self, int damage);
void *Object_new(size_t size, Object proto, char *description);
#define NEW(T, N) Object_new(sizeof(T), T##Proto, N)
#define _(N) proto.N
Replies to Re: Untitled
Title |
Name |
Language |
UNIX |
When |
Re: Re: Untitled |
Hot Pheasant |
text |
1548261602 |
5 Years ago. |
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