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/*
* Copyright (C) 2003-2009 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 "directory_save.h"
#include "directory.h"
#include "song.h"
#include "path.h"
#include "song_save.h"
#include <assert.h>
#include <string.h>
#define DIRECTORY_MTIME "mtime: "
#define DIRECTORY_BEGIN "begin: "
#define DIRECTORY_END "end: "
/**
* The quark used for GError.domain.
*/
static inline GQuark
directory_quark(void)
{
return g_quark_from_static_string("directory");
}
/* TODO error checking */
int
directory_save(FILE *fp, struct directory *directory)
{
struct dirvec *children = &directory->children;
size_t i;
int retv;
if (!directory_is_root(directory)) {
fprintf(fp, DIRECTORY_MTIME "%lu\n",
(unsigned long)directory->mtime);
retv = fprintf(fp, "%s%s\n", DIRECTORY_BEGIN,
directory_get_path(directory));
if (retv < 0)
return -1;
}
for (i = 0; i < children->nr; ++i) {
struct directory *cur = children->base[i];
char *base = g_path_get_basename(cur->path);
retv = fprintf(fp, DIRECTORY_DIR "%s\n", base);
g_free(base);
if (retv < 0)
return -1;
if (directory_save(fp, cur) < 0)
return -1;
}
songvec_save(fp, &directory->songs);
if (!directory_is_root(directory) &&
fprintf(fp, DIRECTORY_END "%s\n",
directory_get_path(directory)) < 0)
return -1;
return 0;
}
static struct directory *
directory_load_subdir(FILE *fp, struct directory *parent, const char *name,
GError **error_r)
{
char buffer[MPD_PATH_MAX * 2];
struct directory *directory;
bool success;
if (!fgets(buffer, sizeof(buffer), fp)) {
g_set_error(error_r, directory_quark(), 0,
"Unexpected end of file");
return NULL;
}
if (g_str_has_prefix(buffer, DIRECTORY_MTIME)) {
parent->mtime =
g_ascii_strtoull(buffer + sizeof(DIRECTORY_MTIME) - 1,
NULL, 10);
if (!fgets(buffer, sizeof(buffer), fp)) {
g_set_error(error_r, directory_quark(), 0,
"Unexpected end of file");
return NULL;
}
}
if (!g_str_has_prefix(buffer, DIRECTORY_BEGIN)) {
g_set_error(error_r, directory_quark(), 0,
"Malformed line: %s", buffer);
return NULL;
}
g_strchomp(buffer);
name = &(buffer[strlen(DIRECTORY_BEGIN)]);
if (!g_str_has_prefix(name, parent->path) != 0) {
g_set_error(error_r, directory_quark(), 0,
"Wrong path in database: '%s' in '%s'",
name, parent->path);
return NULL;
}
directory = directory_get_child(parent, name);
if (directory != NULL) {
assert(directory->parent == parent);
} else {
directory = directory_new(name, parent);
dirvec_add(&parent->children, directory);
}
success = directory_load(fp, directory, error_r);
if (!success)
return NULL;
return directory;
}
bool
directory_load(FILE *fp, struct directory *directory, GError **error)
{
char buffer[MPD_PATH_MAX * 2];
bool success;
while (fgets(buffer, sizeof(buffer), fp)
&& !g_str_has_prefix(buffer, DIRECTORY_END)) {
g_strchomp(buffer);
if (g_str_has_prefix(buffer, DIRECTORY_DIR)) {
struct directory *subdir =
directory_load_subdir(fp, directory,
buffer + sizeof(DIRECTORY_DIR) - 1,
error);
if (subdir == NULL)
return false;
} else if (g_str_has_prefix(buffer, SONG_BEGIN)) {
success = songvec_load(fp, &directory->songs,
directory, error);
if (!success)
return false;
} else {
g_set_error(error, directory_quark(), 0,
"Malformed line: %s", buffer);
return false;
}
}
return true;
}
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