Mercurial > hg > early-roguelike
view rogue5/list.c @ 229:50b89f165a34
Use uniform return types for functions related to options.
Functions for printing options now return void. Functions for setting
options now return int. Argument types still vary, though converting
all the option pointers to void* would be possible.
author | John "Elwin" Edwards |
---|---|
date | Sun, 06 Mar 2016 14:45:18 -0500 |
parents | f502bf60e6e4 |
children |
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/* * Functions for dealing with linked lists of goodies * * @(#)list.c 4.12 (Berkeley) 02/05/99 * * Rogue: Exploring the Dungeons of Doom * Copyright (C) 1980-1983, 1985, 1999 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" #ifdef MASTER 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(item); } /* * new_item * Get a new item with a specified size */ THING * new_item(void) { THING *item; if ((item = calloc(1, sizeof *item)) == NULL) { #ifdef MASTER msg("ran out of memory after %d items", total); #endif return NULL; } #ifdef MASTER total++; #endif item->l_next = NULL; item->l_prev = NULL; return item; }