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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 "text_file.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,
GString *buffer, GError **error_r)
{
struct directory *directory;
const char *line;
bool success;
if (directory_get_child(parent, name) != NULL) {
g_set_error(error_r, directory_quark(), 0,
"Duplicate subdirectory '%s'", name);
return NULL;
}
if (directory_is_root(parent)) {
directory = directory_new(name, parent);
} else {
char *path = g_strconcat(directory_get_path(parent), "/",
name, NULL);
directory = directory_new(path, parent);
g_free(path);
}
line = read_text_line(fp, buffer);
if (line == NULL) {
g_set_error(error_r, directory_quark(), 0,
"Unexpected end of file");
directory_free(directory);
return NULL;
}
if (g_str_has_prefix(line, DIRECTORY_MTIME)) {
directory->mtime =
g_ascii_strtoull(line + sizeof(DIRECTORY_MTIME) - 1,
NULL, 10);
line = read_text_line(fp, buffer);
if (line == NULL) {
g_set_error(error_r, directory_quark(), 0,
"Unexpected end of file");
directory_free(directory);
return NULL;
}
}
if (!g_str_has_prefix(line, DIRECTORY_BEGIN)) {
g_set_error(error_r, directory_quark(), 0,
"Malformed line: %s", line);
directory_free(directory);
return NULL;
}
success = directory_load(fp, directory, buffer, error_r);
if (!success) {
directory_free(directory);
return NULL;
}
return directory;
}
bool
directory_load(FILE *fp, struct directory *directory,
GString *buffer, GError **error)
{
const char *line;
bool success;
while ((line = read_text_line(fp, buffer)) != NULL &&
!g_str_has_prefix(line, DIRECTORY_END)) {
if (g_str_has_prefix(line, DIRECTORY_DIR)) {
struct directory *subdir =
directory_load_subdir(fp, directory,
line + sizeof(DIRECTORY_DIR) - 1,
buffer, error);
if (subdir == NULL)
return false;
dirvec_add(&directory->children, subdir);
} else if (strcmp(line, SONG_BEGIN) == 0) {
success = songvec_load(fp, &directory->songs,
directory, buffer, error);
if (!success)
return false;
} else {
g_set_error(error, directory_quark(), 0,
"Malformed line: %s", line);
return false;
}
}
return true;
}
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