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/*
* 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/>.
*/
#include "globals.h"
#include "hash.h"
#include "obj.h"
/* map of class names -> object classes */
static void *obj_class_map = NULL;
static obj_id idcounter = 1;
obj_id obj_get_idcounter(void)
{
return idcounter;
}
void obj_set_idcounter(obj_id c)
{
idcounter = c;
}
struct object_t *obj_new(const char *class_name)
{
if(!obj_class_map)
{
extern const struct obj_class_t netcosm_obj_classes[];
extern const size_t netcosm_obj_classes_sz;
obj_class_map = hash_init(netcosm_obj_classes_sz / 2 + 1,
hash_djb,
compare_strings);
for(unsigned i = 0; i < netcosm_obj_classes_sz; ++i)
{
if(hash_insert(obj_class_map,
netcosm_obj_classes[i].class_name,
netcosm_obj_classes + i))
error("duplicate object class name");
}
}
struct object_t *obj = calloc(1, sizeof(struct object_t));
obj->class = hash_lookup(obj_class_map, class_name);
if(!obj->class)
{
free(obj);
error("unknown object class '%s'", class_name);
}
obj->id = idcounter++;
obj->refcount = 1;
return obj;
}
void obj_write(int fd, struct object_t *obj)
{
write_string(fd, obj->class->class_name);
write_uint64(fd, obj->id);
write_string(fd, obj->name);
write_bool(fd, obj->list);
if(obj->class->hook_serialize)
obj->class->hook_serialize(fd, obj);
}
struct object_t *obj_read(int fd)
{
char *class_name = read_string(fd);
struct object_t *obj = obj_new(class_name);
free(class_name);
obj->id = read_uint64(fd);
obj->name = read_string(fd);
obj->list = read_bool(fd);
if(obj->class->hook_deserialize)
obj->class->hook_deserialize(fd, obj);
return obj;
}
struct object_t *obj_copy(struct object_t *obj)
{
struct object_t *ret = obj_new(obj->class->class_name);
ret->name = strdup(obj->name);
ret->list = obj->list;
ret->userdata = obj->class->hook_dupdata(obj);
return ret;
}
struct object_t *obj_dup(struct object_t *obj)
{
debugf("Adding an object reference for #%lu.\n", obj->id);
++obj->refcount;
return obj;
}
void obj_free(void *ptr)
{
struct object_t *obj = ptr;
--obj->refcount;
debugf("Freeing an object reference for #%lu (%s, %d).\n", obj->id, obj->name, obj->refcount);
if(!obj->refcount)
{
debugf("Freeing object #%lu\n", obj->id);
if(obj->class->hook_destroy)
obj->class->hook_destroy(obj);
free(obj->name);
free(obj);
}
}
void obj_shutdown(void)
{
hash_free(obj_class_map);
obj_class_map = NULL;
}
int obj_compare(const void *a, const void *b)
{
const struct object_t *c = a, *d = b;
return !(c->id == d->id);
}
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