struct cursor *alloc_cursor(struct btree *btree, int extra)
{
int maxlevel = btree->root.depth + 1 + extra;
struct cursor *cursor = malloc(alloc_cursor_size(maxlevel));
if (cursor) {
cursor->btree = btree;
cursor->len = 0;
#ifdef CURSOR_DEBUG
cursor->maxlen = maxlevel;
for (int i = 0; i < maxlevel; i++) {
cursor->path[i].buffer = FREE_BUFFER; /* for debug */
cursor->path[i].next = FREE_NEXT; /* for debug */
}
#endif
}
return cursor;
}
struct cursor *alloc_cursor(struct btree *btree, int extra)
{
if(DEBUG_MODE_K==1)
{
printf("\t\t\t\t%25s[K] %25s %4d #in\n",__FILE__,__func__,__LINE__);
}
int maxlevel = btree->root.depth + extra;
struct cursor *cursor = malloc(alloc_cursor_size(maxlevel + 1));
if (cursor) {
cursor->btree = btree;
cursor->level = -1;
#ifdef CURSOR_DEBUG
cursor->maxlevel = maxlevel;
for (int i = 0; i <= maxlevel; i++) {
cursor->path[i].buffer = FREE_BUFFER; /* for debug */
cursor->path[i].next = FREE_NEXT; /* for debug */
}
#endif
}
return cursor;
}
