universe@4: #include "dlist.h"
universe@4: 
universe@8: void ucx_dlist_free(UcxDlist *l) {
universe@8:     UcxDlist *e = l, *f;
universe@8:     while (e != NULL) {
universe@8:         f = e;
universe@8:         e = e->next;
universe@8:         free(f);
universe@8:     }
universe@8: }
universe@8: 
universe@7: UcxDlist *ucx_dlist_append(UcxDlist *l, void *data)  {
universe@8:     UcxDlist *nl = (UcxDlist*) malloc(sizeof(UcxDlist));
universe@8:     if (nl == NULL) return NULL;
universe@7:     
universe@8:     nl->data = data;
universe@8:     nl->next = NULL;
universe@8:     if (l == NULL) {
universe@8:         return nl;
universe@8:     } else {
universe@8:         UcxDlist *t = ucx_dlist_last(l);
universe@8:         t->next = nl;
universe@8:         nl->prev = t;
universe@8:         return l;
universe@8:     }
universe@7: }
universe@7: 
universe@7: UcxDlist *ucx_dlist_prepend(UcxDlist *l, void *data) {
universe@8:     UcxDlist *nl = ucx_dlist_append(NULL, data);
universe@8:     if (nl == NULL) return NULL;
universe@7:     
universe@8:     if (l != NULL) {
universe@8:         nl->next = l;
universe@8:         l->prev = nl;
universe@8:     }
universe@8:     return nl;
universe@7: }
universe@7: 
universe@7: UcxDlist *ucx_dlist_concat(UcxDlist *l1, UcxDlist *l2) {
universe@8:     if (l1 == NULL) {
universe@8:         return l2;
universe@8:     } else {
universe@8:         UcxDlist *last = ucx_dlist_last(l1);
universe@8:         last->next = l2;
universe@8:         l2->prev = last;
universe@8:         return l1;
universe@8:     }
universe@7: }
universe@7: 
universe@7: UcxDlist *ucx_dlist_last(UcxDlist *l) {
universe@7:     if (l == NULL) return NULL;
universe@7:     
universe@7:     UcxDlist *e = l;
universe@7:     while (e->next != NULL) {
universe@7:         e = e->next;
universe@7:     }
universe@7:     return e;
universe@7: }
universe@7: 
universe@7: UcxDlist *ucx_dlist_get(UcxDlist *l, int index) {
universe@8:     if (l == NULL) return NULL;
universe@8: 
universe@8:     UcxDlist *e = l;
universe@8:     while (e->next != NULL && index > 0) {
universe@8:         e = e->next;
universe@8:         index--;
universe@8:     }
universe@7:     
universe@8:     return index == 0 ? e : NULL;
universe@7: }
universe@7: 
universe@7: size_t ucx_dlist_size(UcxDlist *l) {
universe@7:     if (l == NULL) return 0;
universe@7:     
universe@7:     UcxDlist *e = l;
universe@7:     size_t s = 1;
universe@7:     while (e->next != NULL) {
universe@7:         e = e->next;
universe@7:         s++;
universe@7:     }
universe@7: 
universe@7:     return s;
universe@7: }
universe@7: 
universe@7: void ucx_dlist_foreach(UcxDlist *l, ucx_callback fnc, void* data) {
universe@8:     UcxDlist *e = l;
universe@8:     while (e != NULL) {
universe@8:         fnc(e, data);
universe@8:         e = e->next;
universe@8:     }
universe@7: }
universe@7: 
universe@7: /* dlist specific functions */
universe@7: UcxDlist *ucx_dlist_first(UcxDlist *l) {
universe@8:     if (l == NULL) return NULL;
universe@7:     
universe@8:     UcxDlist *e = l;
universe@8:     while (e->prev != NULL) {
universe@8:         e = e->prev;
universe@8:     }
universe@8:     return e;
universe@7: }