1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/*
* NetCosm - a MUD server
* Copyright (C) 2016 Franklin Wei
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "globals.h"
#include "room.h"
/* Objects belong to an object class. Objects define their object
* class through the class name, which is converted to a class ID
* internally.
*/
struct object_t;
typedef struct child_data user_t; // see server.h for the definition
struct obj_class_t {
const char *class_name;
/* write an object's user data to disk */
void (*hook_serialize)(int fd, struct object_t*);
/* read an object's user data */
void (*hook_deserialize)(int fd, struct object_t*);
/* called when an object is taken;
* true = can take
* false = can't take
* no function (NULL) = can take */
bool (*hook_take)(struct object_t*, user_t *user);
/* called when dropping an object;
* true: can drop
* false: can't drop
* NULL: can drop
*/
bool (*hook_drop)(struct object_t*, user_t *user);
void (*hook_destroy)(struct object_t*); // free resources
const char* (*hook_desc)(struct object_t*, user_t*); // get object description
};
struct object_t {
char *name; /* no articles: "a", "an", "the", needs to be free()able */
struct obj_class_t *class;
bool list;
unsigned refcount;
void *userdata;
};
/* returns a new object of class 'c' */
struct object_t *obj_new(const char *c);
/* serialize an object */
void obj_write(int fd, struct object_t *obj);
/* deserialize an object */
struct object_t *obj_read(int fd);
/* this used to actually make a duplicate of an object...
* now it just increments its reference count */
struct object_t *obj_dup(struct object_t *obj);
/* this only frees the object if its reference count is zero */
void obj_free(void*);
/* shut down the obj_* module */
void obj_shutdown(void);
|
