126 lines
2.9 KiB
C
126 lines
2.9 KiB
C
/*
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* Copyright (C) 2003-2011 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "playlist_vector.h"
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#include <assert.h>
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#include <string.h>
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#include <glib.h>
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static struct playlist_metadata *
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playlist_metadata_new(const char *name, time_t mtime)
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{
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assert(name != NULL);
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struct playlist_metadata *pm = g_slice_new(struct playlist_metadata);
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pm->name = g_strdup(name);
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pm->mtime = mtime;
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return pm;
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}
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static void
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playlist_metadata_free(struct playlist_metadata *pm)
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{
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assert(pm != NULL);
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assert(pm->name != NULL);
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g_free(pm->name);
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g_slice_free(struct playlist_metadata, pm);
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}
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void
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playlist_vector_deinit(struct playlist_vector *pv)
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{
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assert(pv != NULL);
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while (pv->head != NULL) {
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struct playlist_metadata *pm = pv->head;
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pv->head = pm->next;
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playlist_metadata_free(pm);
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}
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}
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static struct playlist_metadata **
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playlist_vector_find_p(struct playlist_vector *pv, const char *name)
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{
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assert(pv != NULL);
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assert(name != NULL);
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struct playlist_metadata **pmp = &pv->head;
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for (;;) {
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struct playlist_metadata *pm = *pmp;
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if (pm == NULL)
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return NULL;
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if (strcmp(pm->name, name) == 0)
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return pmp;
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pmp = &pm->next;
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}
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}
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struct playlist_metadata *
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playlist_vector_find(struct playlist_vector *pv, const char *name)
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{
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struct playlist_metadata **pmp = playlist_vector_find_p(pv, name);
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return pmp != NULL ? *pmp : NULL;
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}
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void
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playlist_vector_add(struct playlist_vector *pv,
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const char *name, time_t mtime)
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{
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struct playlist_metadata *pm = playlist_metadata_new(name, mtime);
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pm->next = pv->head;
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pv->head = pm;
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}
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bool
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playlist_vector_update_or_add(struct playlist_vector *pv,
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const char *name, time_t mtime)
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{
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struct playlist_metadata **pmp = playlist_vector_find_p(pv, name);
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if (pmp != NULL) {
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struct playlist_metadata *pm = *pmp;
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if (mtime == pm->mtime)
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return false;
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pm->mtime = mtime;
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} else
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playlist_vector_add(pv, name, mtime);
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return true;
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}
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bool
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playlist_vector_remove(struct playlist_vector *pv, const char *name)
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{
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struct playlist_metadata **pmp = playlist_vector_find_p(pv, name);
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if (pmp == NULL)
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return false;
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struct playlist_metadata *pm = *pmp;
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*pmp = pm->next;
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playlist_metadata_free(pm);
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return true;
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}
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