rogue/error.c

103 lines
1.5 KiB
C
Raw Normal View History

2011-10-13 09:59:16 -06:00
/*
* Functions for dealing with linked lists of goodies
*
* @(#)error.c 4.12 (Berkeley) 02/05/99
*/
#include <curses.h>
#include "netprot.h"
#ifdef MASTER
static int Total = 0; /* Total dynamic memory bytes */
#endif
/*
* detach:
* Takes an item out of whatever linked list it might be in
*/
void
_detach(THING **list, THING *item)
{
if (*list == item)
*list = next(item);
if (prev(item) != NULL)
item->l_prev->l_next = next(item);
if (next(item) != NULL)
item->l_next->l_prev = prev(item);
item->l_next = NULL;
item->l_prev = NULL;
}
/*
* _attach:
* add an item to the head of a list
*/
void
_attach(THING **list, THING *item)
{
if (*list != NULL)
{
item->l_next = *list;
(*list)->l_prev = item;
item->l_prev = NULL;
}
else
{
item->l_next = NULL;
item->l_prev = NULL;
}
*list = item;
}
/*
* _free_list:
* Throw the whole blamed thing away
*/
void
_free_list(THING **ptr)
{
THING *item;
while (*ptr != NULL)
{
item = *ptr;
*ptr = next(item);
discard(item);
}
}
/*
* discard:
* Free up an item
*/
void
discard(THING *item)
{
#ifdef MASTER
Total--;
#endif
free((char *) item);
}
/*
* new_item
* Get a new item with a specified size
*/
THING *
new_item(void)
{
THING *item;
#ifdef MASTER
if ((item = calloc(1, sizeof *item)) == NULL)
msg("ran out of memory after %d items", Total);
else
Total++;
#else
item = calloc(1, sizeof *item);
#endif
item->l_next = NULL;
item->l_prev = NULL;
return item;
}