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/*
* Copyright (C) 2003-2010 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "playlist_vector.h"
#include <assert.h>
#include <string.h>
#include <glib.h>
static struct playlist_metadata *
playlist_metadata_new(const char *name, time_t mtime)
{
assert(name != NULL);
struct playlist_metadata *pm = g_slice_new(struct playlist_metadata);
pm->name = g_strdup(name);
pm->mtime = mtime;
return pm;
}
static void
playlist_metadata_free(struct playlist_metadata *pm)
{
assert(pm != NULL);
assert(pm->name != NULL);
g_free(pm->name);
g_slice_free(struct playlist_metadata, pm);
}
void
playlist_vector_deinit(struct playlist_vector *pv)
{
assert(pv != NULL);
while (pv->head != NULL) {
struct playlist_metadata *pm = pv->head;
pv->head = pm->next;
playlist_metadata_free(pm);
}
}
static struct playlist_metadata **
playlist_vector_find_p(struct playlist_vector *pv, const char *name)
{
assert(pv != NULL);
assert(name != NULL);
struct playlist_metadata **pmp = &pv->head;
for (;;) {
struct playlist_metadata *pm = *pmp;
if (pm == NULL)
return NULL;
if (strcmp(pm->name, name) == 0)
return pmp;
pmp = &pm->next;
}
}
struct playlist_metadata *
playlist_vector_find(struct playlist_vector *pv, const char *name)
{
struct playlist_metadata **pmp = playlist_vector_find_p(pv, name);
return pmp != NULL ? *pmp : NULL;
}
void
playlist_vector_add(struct playlist_vector *pv,
const char *name, time_t mtime)
{
struct playlist_metadata *pm = playlist_metadata_new(name, mtime);
pm->next = pv->head;
pv->head = pm;
}
bool
playlist_vector_update_or_add(struct playlist_vector *pv,
const char *name, time_t mtime)
{
struct playlist_metadata **pmp = playlist_vector_find_p(pv, name);
if (pmp != NULL) {
struct playlist_metadata *pm = *pmp;
if (mtime == pm->mtime)
return false;
pm->mtime = mtime;
} else
playlist_vector_add(pv, name, mtime);
return true;
}
bool
playlist_vector_remove(struct playlist_vector *pv, const char *name)
{
struct playlist_metadata **pmp = playlist_vector_find_p(pv, name);
if (pmp == NULL)
return false;
struct playlist_metadata *pm = *pmp;
*pmp = pm->next;
playlist_metadata_free(pm);
return true;
}
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