list.cpp

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 * are met:
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 *    notice, this list of conditions and the following disclaimer.
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 *    notice, this list of conditions and the following disclaimer in the
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING,
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 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <list>
 
#include "utils/list.h"
 
using std::list;
 
struct simple_linked_list {
        list <void *> l;
};
 
struct sll_it {
        list <void *>::iterator end;
        list <void *>::iterator it;
};
 
struct simple_linked_list *simple_linked_list_init(void)
{
        return new simple_linked_list();
}
 
void simple_linked_list_destroy(struct simple_linked_list *l)
{
        delete l;
}
 
void simple_linked_list_prepend(struct simple_linked_list *l, void *data)
{
        l->l.push_front(data);
}
 
void simple_linked_list_append(struct simple_linked_list *l, void *data)
{
        l->l.push_back(data);
}
 
bool simple_linked_list_append_if_less(struct simple_linked_list *l, void *data, int max_size)
{
        if (l->l.size() >= (unsigned) max_size) {
                return false;
        }
        l->l.push_back(data);
        return true;
}
 
void *simple_linked_list_pop(struct simple_linked_list *l)
{
        if (simple_linked_list_size(l) == 0) {
                return nullptr;
        }
        void *ret = l->l.front();
        l->l.pop_front();
 
        return ret;
}
 
int simple_linked_list_size(struct simple_linked_list *l)
{
        return l->l.size();
}
 
void *simple_linked_list_first(struct simple_linked_list *l)
{
        return l->l.front();
}
 
void *simple_linked_list_last(struct simple_linked_list *l)
{
        return l->l.back();
}
 
void *simple_linked_list_it_init(struct simple_linked_list *l)
{
        if (l->l.size() == 0) {
                return nullptr;
        }
        auto ret = new sll_it();
        ret->it = l->l.begin();
        ret->end = l->l.end();
        return ret;
}
 
void *simple_linked_list_it_next(void **i)
{
        auto sit = (sll_it *) *i;
 
        void *ret = *sit->it;
        ++sit->it;
        if (sit->it == sit->end) {
                delete sit;
                *i = nullptr;
        }
        return ret;
}
 
void *simple_linked_list_it_peek_next(const void *it)
{
        const auto *sit = static_cast<const sll_it *>(it);
 
        return *sit->it;
}
 
void simple_linked_list_it_destroy(void *i)
{
        delete (sll_it *) i;
}
 
bool simple_linked_list_remove(struct simple_linked_list *l, void *item)
{
        for (auto it = l->l.begin(); it != l->l.end(); ++it) {
                if (*it == item) {
                        l->l.erase(it);
                        return true;
                }
        }
        return false;
}
 
void *simple_linked_list_remove_index(struct simple_linked_list *l, int index)
{
        int i = 0;
        for (auto it = l->l.begin(); it != l->l.end(); ++it) {
                if (i++ == index) {
                        void *ret = *it;
                        l->l.erase(it);
                        return ret;
                }
        }
        return nullptr;
}