ILAttribute *ILAttributeCreate(ILImage *image, ILToken token)
{
ILAttribute *attr;
/* Allocate memory for the attribute */
attr = ILMemStackAlloc(&(image->memStack), ILAttribute);
if(!attr)
{
return 0;
}
/* Initialize the attribute fields */
attr->programItem.image = image;
/* Assign the token code to the attribute */
if(!_ILImageSetToken(image, &(attr->programItem),
token, IL_META_TOKEN_CUSTOM_ATTRIBUTE))
{
return 0;
}
/* Return the attribute to the caller */
return attr;
}
int _ILProgramItemLink(ILProgramItem *item1, ILProgramItem *item2)
{
ILProgramItemLink *link;
ILProgramItemLink *link2;
/* Bail out if item1 and item2 are identical */
if(item1 == item2)
{
return 1;
}
/* Create the link from item1 to item2 */
if(!(item1->linked))
{
/* Create a new link entry for the item */
link = ILMemStackAlloc(&(item1->image->memStack), ILProgramItemLink);
if(!link)
{
return 0;
}
link->customAttrs = (ILAttribute *)(item1->attrsOrLink);
link->linkedItem = item2;
link->next = 0;
item1->attrsOrLink = (void *)link;
item1->linked = 1;
}
else
{
/* Remove the current link, if present */
link = ((ILProgramItemLink *)(item1->attrsOrLink));
if(link->linkedItem != 0)
{
link2 = ((ILProgramItemLink *)(link->linkedItem->attrsOrLink));
link2 = link2->next;
while(link2 != 0)
{
if(link2->linkedItem == item1)
{
link2->linkedItem = 0;
break;
}
link2 = link2->next;
}
}
/* Replace the current link entry for the item */
link->linkedItem = item2;
}
/* Create the reverse link from item2 to item1 */
if(!(item2->linked))
{
/* Create a new link entry for the second item */
link = ILMemStackAlloc(&(item2->image->memStack), ILProgramItemLink);
if(!link)
{
((ILProgramItemLink *)(item1->attrsOrLink))->linkedItem = 0;
return 0;
}
link->customAttrs = (ILAttribute *)(item2->attrsOrLink);
link->linkedItem = 0;
link->next = 0;
item2->attrsOrLink = (void *)link;
item2->linked = 1;
}
else
{
link = (ILProgramItemLink *)(item2->attrsOrLink);
}
link2 = link->next;
while(link2 != 0)
{
if(link2->linkedItem == 0)
{
link2->linkedItem = item1;
return 1;
}
link = link2;
link2 = link2->next;
}
link2 = ILMemStackAlloc(&(item2->image->memStack), ILProgramItemLink);
if(!link2)
{
((ILProgramItemLink *)(item1->attrsOrLink))->linkedItem = 0;
return 0;
}
link2->customAttrs = 0;
link2->linkedItem = item1;
link2->next = 0;
link->next = link2;
return 1;
}
