view arogue5/list.c @ 282:8b6aba552f6f

Excise md_putchar(). The function wrapped the standard putchar(), doing nothing beside discarding the return value. That could cause problems with tputs(), which expects an int to be returned.
author John "Elwin" Edwards
date Mon, 18 Sep 2017 19:11:57 -0400
parents 56e748983fa8
children 0250220d8cdd
line wrap: on
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/*
 * Functions for dealing with linked lists of goodies
 *
 * Advanced Rogue
 * Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
 * All rights reserved.
 *
 * Based on "Rogue: Exploring the Dungeons of Doom"
 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
 * All rights reserved.
 *
 * See the file LICENSE.TXT for full copyright and licensing information.
 */

#include <stdlib.h>
#include "curses.h"
#include "rogue.h"

/*
 * detach:
 *	Takes an item out of whatever linked list it might be in
 */

void
_detach(struct linked_list **list, struct linked_list *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(struct linked_list **list, struct linked_list *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;
}

/*
 * o_free_list:
 *	Throw the whole object list away
 */

void
_o_free_list(struct linked_list **ptr)
{
    register struct linked_list *item;

    while (*ptr != NULL)
    {
	item = *ptr;
	*ptr = next(item);
	o_discard(item);
    }
}

/*
 * o_discard:
 *	free up an item and its object(and maybe contents)
 */

void
o_discard(struct linked_list *item)
{
    register struct object *obj;
    obj = OBJPTR(item);
    if (obj->contents != NULL)
	o_free_list(obj->contents);
    total -= 2;
    FREE(item->l_data);
    FREE(item);
}

/*
 * t_free_list:
 *	Throw the whole thing list away
 */

void
_t_free_list(struct linked_list **ptr)
{
    register struct linked_list *item;

    while (*ptr != NULL)
    {
	item = *ptr;
	*ptr = next(item);
	t_discard(item);
    }
}

/*
 * t_discard:
 *	free up an item and its thing
 */

void
t_discard(struct linked_list *item)
{
    total -= 2;
    FREE(item->l_data);
    FREE(item);
}

/*
 * destroy_item:
 *	get rid of an item structure -- don't worry about contents
 */

void
destroy_item(struct linked_list *item)
{
    total--;
    FREE(item);
}

/*
 * new_item
 *	get a new item with a specified size
 */

struct linked_list *
new_item(int size)
{
    register struct linked_list *item;

    if ((item = (struct linked_list *) new(sizeof *item)) == NULL)
	msg("Ran out of memory for header after %d items", total);
    if ((item->l_data = new(size)) == NULL)
	msg("Ran out of memory for data after %d items", total);
    item->l_next = item->l_prev = NULL;
    return item;
}

/*
 * creat_item:
 *	Create just an item structure -- don't make any contents
 */

struct linked_list *
creat_item(void)
{
    register struct linked_list *item;

    if ((item = (struct linked_list *) new(sizeof *item)) == NULL)
	msg("Ran out of memory for header after %d items", total);
    item->l_next = item->l_prev = NULL;
    return item;
}

char *
new(int size)
{
    register char *space = ALLOC(size);
    static char errbuf[LINELEN];

    if (space == NULL) {
	sprintf(errbuf,"Rogue ran out of memory (used = %d, wanted = %d).",
		md_memused(), size);
	fatal(errbuf);
    }
    total++;
    return space;
}