122 lines
2.9 KiB
C
122 lines
2.9 KiB
C
/*
|
|
* Copyright (C) 2003-2012 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 "song_sort.h"
|
|
#include "song.h"
|
|
#include "util/list.h"
|
|
#include "util/list_sort.h"
|
|
#include "tag.h"
|
|
|
|
#include <glib.h>
|
|
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
|
|
static const char *
|
|
tag_get_value_checked(const struct tag *tag, enum tag_type type)
|
|
{
|
|
return tag != NULL
|
|
? tag_get_value(tag, type)
|
|
: NULL;
|
|
}
|
|
|
|
static int
|
|
compare_utf8_string(const char *a, const char *b)
|
|
{
|
|
if (a == NULL)
|
|
return b == NULL ? 0 : -1;
|
|
|
|
if (b == NULL)
|
|
return 1;
|
|
|
|
return g_utf8_collate(a, b);
|
|
}
|
|
|
|
/**
|
|
* Compare two string tag values, ignoring case. Either one may be
|
|
* NULL.
|
|
*/
|
|
static int
|
|
compare_string_tag_item(const struct tag *a, const struct tag *b,
|
|
enum tag_type type)
|
|
{
|
|
return compare_utf8_string(tag_get_value_checked(a, type),
|
|
tag_get_value_checked(b, type));
|
|
}
|
|
|
|
/**
|
|
* Compare two tag values which should contain an integer value
|
|
* (e.g. disc or track number). Either one may be NULL.
|
|
*/
|
|
static int
|
|
compare_number_string(const char *a, const char *b)
|
|
{
|
|
long ai = a == NULL ? 0 : strtol(a, NULL, 10);
|
|
long bi = b == NULL ? 0 : strtol(b, NULL, 10);
|
|
|
|
if (ai <= 0)
|
|
return bi <= 0 ? 0 : -1;
|
|
|
|
if (bi <= 0)
|
|
return 1;
|
|
|
|
return ai - bi;
|
|
}
|
|
|
|
static int
|
|
compare_tag_item(const struct tag *a, const struct tag *b, enum tag_type type)
|
|
{
|
|
return compare_number_string(tag_get_value_checked(a, type),
|
|
tag_get_value_checked(b, type));
|
|
}
|
|
|
|
/* Only used for sorting/searchin a songvec, not general purpose compares */
|
|
static int
|
|
song_cmp(G_GNUC_UNUSED void *priv, struct list_head *_a, struct list_head *_b)
|
|
{
|
|
const struct song *a = (const struct song *)_a;
|
|
const struct song *b = (const struct song *)_b;
|
|
int ret;
|
|
|
|
/* first sort by album */
|
|
ret = compare_string_tag_item(a->tag, b->tag, TAG_ALBUM);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
/* then sort by disc */
|
|
ret = compare_tag_item(a->tag, b->tag, TAG_DISC);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
/* then by track number */
|
|
ret = compare_tag_item(a->tag, b->tag, TAG_TRACK);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
/* still no difference? compare file name */
|
|
return g_utf8_collate(a->uri, b->uri);
|
|
}
|
|
|
|
void
|
|
song_list_sort(struct list_head *songs)
|
|
{
|
|
list_sort(NULL, songs, song_cmp);
|
|
}
|