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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 "dirvec.h"
#include "directory.h"
#include <glib.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
static GMutex *nr_lock = NULL;
static size_t dv_size(const struct dirvec *dv)
{
return dv->nr * sizeof(struct directory *);
}
/* Only used for sorting/searching a dirvec, not general purpose compares */
static int dirvec_cmp(const void *d1, const void *d2)
{
const struct directory *a = ((const struct directory * const *)d1)[0];
const struct directory *b = ((const struct directory * const *)d2)[0];
return g_utf8_collate(a->path, b->path);
}
void dirvec_init(void)
{
g_assert(nr_lock == NULL);
nr_lock = g_mutex_new();
}
void dirvec_deinit(void)
{
g_assert(nr_lock != NULL);
g_mutex_free(nr_lock);
nr_lock = NULL;
}
void dirvec_sort(struct dirvec *dv)
{
g_mutex_lock(nr_lock);
qsort(dv->base, dv->nr, sizeof(struct directory *), dirvec_cmp);
g_mutex_unlock(nr_lock);
}
struct directory *dirvec_find(const struct dirvec *dv, const char *path)
{
char *base;
int i;
struct directory *ret = NULL;
base = g_path_get_basename(path);
g_mutex_lock(nr_lock);
for (i = dv->nr; --i >= 0; )
if (!strcmp(directory_get_name(dv->base[i]), base)) {
ret = dv->base[i];
break;
}
g_mutex_unlock(nr_lock);
g_free(base);
return ret;
}
int dirvec_delete(struct dirvec *dv, struct directory *del)
{
size_t i;
g_mutex_lock(nr_lock);
for (i = 0; i < dv->nr; ++i) {
if (dv->base[i] != del)
continue;
/* we _don't_ call directory_free() here */
if (!--dv->nr) {
g_mutex_unlock(nr_lock);
g_free(dv->base);
dv->base = NULL;
return i;
} else {
memmove(&dv->base[i], &dv->base[i + 1],
(dv->nr - i) * sizeof(struct directory *));
dv->base = g_realloc(dv->base, dv_size(dv));
}
break;
}
g_mutex_unlock(nr_lock);
return i;
}
void dirvec_add(struct dirvec *dv, struct directory *add)
{
g_mutex_lock(nr_lock);
++dv->nr;
dv->base = g_realloc(dv->base, dv_size(dv));
dv->base[dv->nr - 1] = add;
g_mutex_unlock(nr_lock);
}
void dirvec_destroy(struct dirvec *dv)
{
g_mutex_lock(nr_lock);
dv->nr = 0;
g_mutex_unlock(nr_lock);
if (dv->base) {
g_free(dv->base);
dv->base = NULL;
}
}
int dirvec_for_each(const struct dirvec *dv,
int (*fn)(struct directory *, void *), void *arg)
{
size_t i;
size_t prev_nr;
g_mutex_lock(nr_lock);
for (i = 0; i < dv->nr; ) {
struct directory *dir = dv->base[i];
assert(dir);
prev_nr = dv->nr;
g_mutex_unlock(nr_lock);
if (fn(dir, arg) < 0)
return -1;
g_mutex_lock(nr_lock); /* dv->nr may change in fn() */
if (prev_nr == dv->nr)
++i;
}
g_mutex_unlock(nr_lock);
return 0;
}
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