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/*-------------------------------------------------------------------*/
/* List Functionality */
/*-------------------------------------------------------------------*/
/* #define SH_LIST_DEBUG */
/*-------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include "shlist.h"
/*-------------------------------------------------------------------*/
void shListInitList( SHLIST *listPtr )
{
listPtr->data = (void *)0L;
listPtr->next = listPtr;
listPtr->prev = listPtr;
}
SHLIST *shListFindItem( SHLIST *head, void *val, shListEqual func )
{
SHLIST *item;
for(item=head->next;( item != head );item=item->next)
if( func ) {
if( func( val, item->data ) ) {
return( item );
}
}
else {
if( item->data == val ) {
return( item );
}
}
return( NULL );
}
SHLIST *shListGetLastItem( SHLIST *head )
{
if( head->prev != head )
return( head->prev );
return( NULL );
}
SHLIST *shListGetFirstItem( SHLIST *head )
{
if( head->next != head )
return( head->next );
return( NULL );
}
SHLIST *shListGetNItem( SHLIST *head, unsigned long num )
{
SHLIST *item;
unsigned long i;
for(i=0,item=head->next;( (i < num) && (item != head) );i++,item=item->next);
if( item != head )
return( item );
return( NULL );
}
SHLIST *shListGetNextItem( SHLIST *head, SHLIST *item )
{
if( item == NULL )
return( NULL );
if( item->next != head )
return( item->next );
return( NULL );
}
SHLIST *shListGetPrevItem( SHLIST *head, SHLIST *item )
{
if( item == NULL )
return( NULL );
if( item->prev != head )
return( item->prev );
return( NULL );
}
void shListDelItem( SHLIST *head, SHLIST *item, shListFree func )
{
if( item == NULL )
return;
#ifdef SH_LIST_DEBUG
fprintf(stderr, "Del %lx\n", (unsigned long)(item->data));
#endif
(item->prev)->next = item->next;
(item->next)->prev = item->prev;
if( func && item->data ) {
func( (void *)(item->data) );
}
free( item );
head->data = (void *)((unsigned long)(head->data) - 1);
}
void shListInsFirstItem( SHLIST *head, void *val )
{ /* Insert to the beginning of the list */
SHLIST *item;
item = (SHLIST *)malloc( sizeof(SHLIST) );
if( item == NULL )
return;
item->data = val;
item->next = head->next;
item->prev = head;
(head->next)->prev = item;
head->next = item;
#ifdef SH_LIST_DEBUG
fprintf(stderr, "Ins First %lx\n", (unsigned long)(item->data));
#endif
head->data = (void *)((unsigned long)(head->data) + 1);
}
void shListInsLastItem( SHLIST *head, void *val )
{ /* Insert to the end of the list */
SHLIST *item;
item = (SHLIST *)malloc( sizeof(SHLIST) );
if( item == NULL )
return;
item->data = val;
item->next = head;
item->prev = head->prev;
(head->prev)->next = item;
head->prev = item;
#ifdef SH_LIST_DEBUG
fprintf(stderr, "Ins Last %lx\n", (unsigned long)(item->data));
#endif
head->data = (void *)((unsigned long)(head->data) + 1);
}
void shListInsBeforeItem( SHLIST *head, void *val, void *etal,
shListCmp func )
{
SHLIST *item, *iptr;
if( func == NULL )
shListInsFirstItem( head, val );
else {
item = (SHLIST *)malloc( sizeof(SHLIST) );
if( item == NULL )
return;
item->data = val;
for(iptr=head->next;( iptr != head );iptr=iptr->next)
if( func( val, iptr->data, etal ) )
break;
item->next = iptr;
item->prev = iptr->prev;
(iptr->prev)->next = item;
iptr->prev = item;
#ifdef SH_LIST_DEBUG
fprintf(stderr, "Ins Before %lx\n", (unsigned long)(item->data));
#endif
head->data = (void *)((unsigned long)(head->data) + 1);
}
}
void shListDelAllItems( SHLIST *head, shListFree func )
{
SHLIST *item;
for(item=head->next;( item != head );) {
shListDelItem( head, item, func );
item = head->next;
}
head->data = (void *)0L;
}
void shListPrintAllItems( SHLIST *head, shListPrint func )
{
#ifdef SH_LIST_DEBUG
SHLIST *item;
for(item=head->next;( item != head );item=item->next)
if( func ) {
func(item->data);
}
else {
fprintf(stderr, "Item: %lx\n",(unsigned long)(item->data));
}
#endif
}
unsigned long shListGetCount( SHLIST *head )
{
return( (unsigned long)(head->data) );
}
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