101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
/*
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* Copyright 2013 (c) Anna Schumaker.
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*/
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#include <core/queue.h>
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#include <core/string.h>
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#include <stdlib.h>
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static int track_less_than(const void *a, const void *b, void *data)
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{
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struct track *lhs = (struct track *)a;
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struct track *rhs = (struct track *)b;
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GSList *cur = (GSList *)data;
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int res, field;
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while (cur) {
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field = GPOINTER_TO_INT(cur->data);
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if (field > 0)
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res = track_compare(lhs, rhs, field);
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else
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res = track_compare(rhs, lhs, abs(field));
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if (res == 0) {
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cur = g_slist_next(cur);
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continue;
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}
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break;
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};
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return res;
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}
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static inline void *__queue_init(struct queue *queue, void *data)
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{
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if (queue->q_ops)
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return queue->q_ops->qop_init(queue, data);
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return NULL;
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}
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static inline void __queue_deinit(struct queue *queue)
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{
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if (queue->q_ops)
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queue->q_ops->qop_deinit(queue);
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}
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static inline unsigned int __queue_added(struct queue *queue,
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struct track *track,
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unsigned int pos)
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{
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queue->q_length += track->tr_length;
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if (queue->q_ops)
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queue->q_ops->qop_added(queue, pos);
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return pos;
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}
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static inline unsigned int __queue_add_tail(struct queue *queue,
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struct track *track)
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{
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g_queue_push_tail(&queue->q_tracks, track);
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return __queue_added(queue, track, queue_size(queue) - 1);
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}
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static inline unsigned int __queue_add_sorted(struct queue *queue,
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struct track *track)
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{
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struct queue_iter it;
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queue_for_each(queue, &it) {
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if (track_less_than(queue_iter_val(&it), track, queue->q_sort) > 0) {
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g_queue_insert_before(&queue->q_tracks, it.it_iter, track);
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return __queue_added(queue, track, it.it_pos);
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}
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}
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return __queue_add_tail(queue, track);
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}
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void queue_init(struct queue *queue, const struct queue_ops *ops, void *data)
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{
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queue->q_length = 0;
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queue->q_sort = NULL;
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queue->q_ops = ops;
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g_queue_init(&queue->q_tracks);
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queue_iter_init(queue, &queue->q_cur);
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queue->q_private = __queue_init(queue, data);
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}
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void queue_deinit(struct queue *queue)
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{
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g_queue_clear(&queue->q_tracks);
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__queue_deinit(queue);
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g_slist_free(queue->q_sort);
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queue->q_sort = NULL;
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}
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unsigned int queue_add(struct queue *queue, struct track *track)
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{
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if (queue->q_sort)
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return __queue_add_sorted(queue, track);
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return __queue_add_tail(queue, track);
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}
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