stasis-aries-wal/src/lladd/linkedlist.c

/*---
This software is copyrighted by the Regents of the University of
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associated with the software unless explicitly disclaimed in
individual files.
                                                                                                                                  
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each file where they apply.
                                                                                                                                  
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POSSIBILITY OF SUCH DAMAGE.
                                                                                                                                  
THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND
THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
                                                                                                                                  
GOVERNMENT USE: If you are acquiring this software on behalf of the
U.S. government, the Government shall have only "Restricted Rights" in
the software and related documentation as defined in the Federal
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acquiring the software on behalf of the Department of Defense, the
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authors grant the U.S. Government and others acting in its behalf
permission to use and distribute the software in accordance with the
terms specified in this license.
---*/
/******************************
 * $Id$
 *
 * simple linked list
 *****************************/
#include <config.h>
#include <lladd/common.h>

#include "linkedlist.h"

#include <stdio.h>

#ifndef NULL
#define NULL 0
#endif 


void printList(LinkedList *l) {
	LinkedListPtr tmp = l;
	printf ("List is ");
	while (tmp!=NULL) {
		printf ("%d ", tmp->val);
		tmp = tmp->next;
	}
	printf (".\n");
}
void addVal(LinkedList **list, int val) {
  LinkedListPtr new = (LinkedListPtr)malloc(sizeof(LinkedList));
  new->val = val;
  new->next = NULL;
  if (*list==NULL) {
    *list = new;
  }
  else {
    new->next = *list;
    *list = new;
  }
}
void removeVal(LinkedList **list, int val) {
  LinkedListPtr tmp, tmpprev;
  if (*list==NULL) return;
  if ((*list!=NULL) && ((*list)->val==val)) {
  	tmp = *list;
	*list = (*list)->next;
	free(tmp);
	return;
  }
  tmp = (*list)->next;
  tmpprev = *list;
  while (tmp!=NULL) {
    if (tmp->val==val) {
		tmpprev->next = tmp->next;
		free(tmp);
		return;
	}
	tmpprev = tmp;
	tmp = tmp->next;
  }
}
int popMaxVal(LinkedList **list) {
	LinkedListPtr tmp;
	int tmpval;
	if (*list!=NULL) {
	  tmp = *list;
	  (*list) = (*list)->next;
	  tmpval = tmp->val;
	  free(tmp);
	  return tmpval;
	}
	else return -1; /*this should be an error! */
}

void addSortedVal(LinkedList **list, int val) {
  LinkedListPtr tmp, tmpprev;
  LinkedListPtr new = (LinkedListPtr)malloc(sizeof(LinkedList));
  new->val = val;
  /*see if new entry should come in the beginning*/
  if ((*list==NULL) || ((*list)->val<val)) {
	new->next = *list;
	*list = new;
	return;
  }
  /*else determine where to put new entry*/
  tmp = (*list)->next;
  tmpprev = *list;
  while (tmp!=NULL) {
	  if (tmp->val<val) {
		  tmpprev->next = new;
		  new->next = tmp;
		  return;
	  }
	  tmpprev = tmp;
	  tmp = tmp->next;
  }
  /*if gotten here, tmp is null so put item at the end of the list*/
  new->next = NULL;
  tmpprev->next = new;
}
/*
  return 1 if val is in the list, 0 otherwise
*/
int findVal(LinkedList *list, int val) {
  LinkedListPtr tmp = list;
  while (tmp!=NULL) {
    if (tmp->val==val)
      return 1;
    tmp = tmp->next;
  }
  return 0;
}

/*  Deallocates all nodes in the list, and sets list to null
 */
void destroyList (LinkedList *list) {
  LinkedListPtr tmp;
  while (list!=NULL) {
    tmp = list->next;
    free(list);
	list=tmp;
  }
  list = NULL;
}