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#ifndef TYPE
#error "Set TYPE before including self file"
#else
INIT_F ( LLIST(TYPE) ) {
self->length = 0;
NEW(LINK(TYPE), head);
NEW(LINK(TYPE), tail);
self->head = head;
self->tail = tail;
head->after = tail;
tail->before = head;
self->cur = head;
self->cval = head->value;
return 0;
}
FREE_F (LINK(TYPE)) {
UNLINK(LINK(TYPE))(self);
if (self->value != NULL) FFREE(TYPE, self->value);
return 0;
}
FREE_F( LLIST(TYPE) ) {
LINK(TYPE) *n, *next;
n = self->head;
while ( n != NULL ) {
next = n->after;
FFREE(LINK(TYPE), n);
n = next;
}
self->length = -1;
return 0;
}
INIT_F ( LINK(TYPE) ) {
self->before = NULL;
self->after = NULL;
self->value = NULL;
return 0;
}
INIT_F ( LINK(TYPE), TYPE* val ) {
self->before = NULL;
self->after = NULL;
self->value = val;
return 0;
}
int UNLINK(LINK(TYPE)) ( LINK(TYPE)* self ) {
if (self->before != NULL) self->before->after = self->after;
if (self->after != NULL) self->after->before = self->before;
return 0;
}
int PUSH(LLIST(TYPE)) ( LLIST(TYPE)* lst, TYPE* val) {
NEW(LINK(TYPE), link, val);
link->after = FIRST(lst);
FIRST(lst) = link;
link->after->before = link;
link->before = lst->head;
++lst->length;
// TODO do I want to change that?
lst->cur = link;
lst->cval = link->value;
return 0;
}
TYPE* PEEK(LLIST(TYPE)) ( LLIST(TYPE)* lst ) {
if (EMPTY(LLIST(TYPE))(lst)) return NULL;
return FIRST(lst)->value;
}
TYPE* POP(LLIST(TYPE)) ( LLIST(TYPE)* lst) {
if (EMPTY(LLIST(TYPE))(lst)) return NULL;
LINK(TYPE)* frst = FIRST(lst);
UNLINK(LINK(TYPE))(frst);
TYPE* retval = frst->value;
--lst->length;
free (frst);
return retval;
}
int DEEP_COPY(LLIST(TYPE)) ( LLIST(TYPE)* dest, LLIST(TYPE)* src ) {
LINK(TYPE)* n = FIRST(src);
while (n->after != NULL) {
NEW(TYPE, cpy);
DEEP_COPY(TYPE)(cpy, n->value);
PUSH(LLIST(TYPE)) ( dest, cpy );
n = n->after;
}
return 0;
}
/*
* Adds two linked lists together.
* O(1) time.
* destroys new__ in the process, but keeps the elements.
* make sure to free(new__) after.
*/
int APPEND(LLIST(TYPE)) ( LLIST(TYPE)* dest, LLIST(TYPE)* new__ ) {
/* Link end of dest onto start of new__. */
LAST(dest)->after = FIRST(new__);
FIRST(new__)->before = LAST(dest);
/* Free the two now not needed end links. */
free(new__->head);
free(dest->tail);
/* Update dest with new__ tail ptr. */
dest->tail = new__->tail;
dest->length += new__->length;
return 0;
}
int SIZE(LLIST(TYPE)) ( LLIST(TYPE)* llist ) {
return llist->length;
}
int EMPTY(LLIST(TYPE)) ( LLIST(TYPE)* llist ) {
return FIRST(llist) == llist->tail;
}
LLIST(TYPE)* RESOLVE(LLIST(TYPE)) (LLIST(TYPE)* dest, LLIST(TYPE)* new__) {
if (dest == NULL) return new__;
APPEND(LLIST(TYPE))(dest, new__);
free(new__);
return dest;
}
int RESET(LLIST(TYPE)) ( LLIST(TYPE)* llist ) {
LINK(TYPE) *link = FIRST(llist), *next;
/*
* Manual looping rather than itterators since we destroyed the
* loop variable.
*/
while (link != llist->tail) {
next = link->after;
FFREE(LINK(TYPE), link);
link = next;
}
llist->cur = llist->head;
llist->cval = llist->head->value;
return 0;
}
FMT_F(LLIST(TYPE)) {
int seek = 0;
fmtf("(");
FOR(LLIST, TYPE, v, self) {
seek += FMT(TYPE)(v, buf + seek);
fmtf(" ");
}
fmtf(")");
return seek;
}
#endif /* TYPE */
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