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authorMax Kellermann <max@duempel.org>2012-07-30 07:26:08 +0200
committerMax Kellermann <max@duempel.org>2012-08-01 09:59:12 +0200
commit9dc9459f3a75d7500720d2294a9eca80d7d3f5bb (patch)
tree0d046c7f20e414537a3518d378a81f23c29df6c5 /src/db/simple_db_plugin.c
parent37b92967c5a8d233536216ac435ebb0d0b17782c (diff)
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db_plugin: convert to C++
Diffstat (limited to 'src/db/simple_db_plugin.c')
-rw-r--r--src/db/simple_db_plugin.c357
1 files changed, 0 insertions, 357 deletions
diff --git a/src/db/simple_db_plugin.c b/src/db/simple_db_plugin.c
deleted file mode 100644
index 697e8da5f..000000000
--- a/src/db/simple_db_plugin.c
+++ /dev/null
@@ -1,357 +0,0 @@
-/*
- * Copyright (C) 2003-2011 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 "simple_db_plugin.h"
-#include "db_internal.h"
-#include "db_error.h"
-#include "db_selection.h"
-#include "db_visitor.h"
-#include "db_save.h"
-#include "db_lock.h"
-#include "conf.h"
-#include "directory.h"
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <errno.h>
-
-struct simple_db {
- struct db base;
-
- char *path;
-
- struct directory *root;
-
- time_t mtime;
-};
-
-G_GNUC_CONST
-static inline GQuark
-simple_db_quark(void)
-{
- return g_quark_from_static_string("simple_db");
-}
-
-G_GNUC_PURE
-static const struct directory *
-simple_db_lookup_directory(const struct simple_db *db, const char *uri)
-{
- assert(db != NULL);
- assert(db->root != NULL);
- assert(uri != NULL);
-
- db_lock();
- struct directory *directory =
- directory_lookup_directory(db->root, uri);
- db_unlock();
- return directory;
-}
-
-static struct db *
-simple_db_init(const struct config_param *param, GError **error_r)
-{
- struct simple_db *db = g_malloc(sizeof(*db));
- db_base_init(&db->base, &simple_db_plugin);
-
- GError *error = NULL;
- db->path = config_dup_block_path(param, "path", &error);
- if (db->path == NULL) {
- g_free(db);
- if (error != NULL)
- g_propagate_error(error_r, error);
- else
- g_set_error(error_r, simple_db_quark(), 0,
- "No \"path\" parameter specified");
- return NULL;
- }
-
- return &db->base;
-}
-
-static void
-simple_db_finish(struct db *_db)
-{
- struct simple_db *db = (struct simple_db *)_db;
-
- g_free(db->path);
- g_free(db);
-}
-
-static bool
-simple_db_check(struct simple_db *db, GError **error_r)
-{
- assert(db != NULL);
- assert(db->path != NULL);
-
- /* Check if the file exists */
- if (access(db->path, F_OK)) {
- /* If the file doesn't exist, we can't check if we can write
- * it, so we are going to try to get the directory path, and
- * see if we can write a file in that */
- char *dirPath = g_path_get_dirname(db->path);
-
- /* Check that the parent part of the path is a directory */
- struct stat st;
- if (stat(dirPath, &st) < 0) {
- g_free(dirPath);
- g_set_error(error_r, simple_db_quark(), errno,
- "Couldn't stat parent directory of db file "
- "\"%s\": %s",
- db->path, g_strerror(errno));
- return false;
- }
-
- if (!S_ISDIR(st.st_mode)) {
- g_free(dirPath);
- g_set_error(error_r, simple_db_quark(), 0,
- "Couldn't create db file \"%s\" because the "
- "parent path is not a directory",
- db->path);
- return false;
- }
-
- /* Check if we can write to the directory */
- if (access(dirPath, X_OK | W_OK)) {
- g_set_error(error_r, simple_db_quark(), errno,
- "Can't create db file in \"%s\": %s",
- dirPath, g_strerror(errno));
- g_free(dirPath);
- return false;
- }
-
- g_free(dirPath);
-
- return true;
- }
-
- /* Path exists, now check if it's a regular file */
- struct stat st;
- if (stat(db->path, &st) < 0) {
- g_set_error(error_r, simple_db_quark(), errno,
- "Couldn't stat db file \"%s\": %s",
- db->path, g_strerror(errno));
- return false;
- }
-
- if (!S_ISREG(st.st_mode)) {
- g_set_error(error_r, simple_db_quark(), 0,
- "db file \"%s\" is not a regular file",
- db->path);
- return false;
- }
-
- /* And check that we can write to it */
- if (access(db->path, R_OK | W_OK)) {
- g_set_error(error_r, simple_db_quark(), errno,
- "Can't open db file \"%s\" for reading/writing: %s",
- db->path, g_strerror(errno));
- return false;
- }
-
- return true;
-}
-
-static bool
-simple_db_load(struct simple_db *db, GError **error_r)
-{
- assert(db != NULL);
- assert(db->path != NULL);
- assert(db->root != NULL);
-
- FILE *fp = fopen(db->path, "r");
- if (fp == NULL) {
- g_set_error(error_r, simple_db_quark(), errno,
- "Failed to open database file \"%s\": %s",
- db->path, g_strerror(errno));
- return false;
- }
-
- if (!db_load_internal(fp, db->root, error_r)) {
- fclose(fp);
- return false;
- }
-
- fclose(fp);
-
- struct stat st;
- if (stat(db->path, &st) == 0)
- db->mtime = st.st_mtime;
-
- return true;
-}
-
-static bool
-simple_db_open(struct db *_db, G_GNUC_UNUSED GError **error_r)
-{
- struct simple_db *db = (struct simple_db *)_db;
-
- db->root = directory_new_root();
- db->mtime = 0;
-
- GError *error = NULL;
- if (!simple_db_load(db, &error)) {
- directory_free(db->root);
-
- g_warning("Failed to load database: %s", error->message);
- g_error_free(error);
-
- if (!simple_db_check(db, error_r))
- return false;
-
- db->root = directory_new_root();
- }
-
- return true;
-}
-
-static void
-simple_db_close(struct db *_db)
-{
- struct simple_db *db = (struct simple_db *)_db;
-
- assert(db->root != NULL);
-
- directory_free(db->root);
-}
-
-static struct song *
-simple_db_get_song(struct db *_db, const char *uri, GError **error_r)
-{
- struct simple_db *db = (struct simple_db *)_db;
-
- assert(db->root != NULL);
-
- db_lock();
- struct song *song = directory_lookup_song(db->root, uri);
- db_unlock();
- if (song == NULL)
- g_set_error(error_r, db_quark(), DB_NOT_FOUND,
- "No such song: %s", uri);
-
- return song;
-}
-
-static bool
-simple_db_visit(struct db *_db, const struct db_selection *selection,
- const struct db_visitor *visitor, void *ctx,
- GError **error_r)
-{
- const struct simple_db *db = (const struct simple_db *)_db;
- const struct directory *directory =
- simple_db_lookup_directory(db, selection->uri);
- if (directory == NULL) {
- struct song *song;
- if (visitor->song != NULL &&
- (song = simple_db_get_song(_db, selection->uri, NULL)) != NULL)
- return visitor->song(song, ctx, error_r);
-
- g_set_error(error_r, db_quark(), DB_NOT_FOUND,
- "No such directory");
- return false;
- }
-
- if (selection->recursive && visitor->directory != NULL &&
- !visitor->directory(directory, ctx, error_r))
- return false;
-
- db_lock();
- bool ret = directory_walk(directory, selection->recursive,
- visitor, ctx, error_r);
- db_unlock();
- return ret;
-}
-
-const struct db_plugin simple_db_plugin = {
- .name = "simple",
- .init = simple_db_init,
- .finish = simple_db_finish,
- .open = simple_db_open,
- .close = simple_db_close,
- .get_song = simple_db_get_song,
- .visit = simple_db_visit,
-};
-
-struct directory *
-simple_db_get_root(struct db *_db)
-{
- struct simple_db *db = (struct simple_db *)_db;
-
- assert(db != NULL);
- assert(db->root != NULL);
-
- return db->root;
-}
-
-bool
-simple_db_save(struct db *_db, GError **error_r)
-{
- struct simple_db *db = (struct simple_db *)_db;
- struct directory *music_root = db->root;
-
- db_lock();
-
- g_debug("removing empty directories from DB");
- directory_prune_empty(music_root);
-
- g_debug("sorting DB");
- directory_sort(music_root);
-
- db_unlock();
-
- g_debug("writing DB");
-
- FILE *fp = fopen(db->path, "w");
- if (!fp) {
- g_set_error(error_r, simple_db_quark(), errno,
- "unable to write to db file \"%s\": %s",
- db->path, g_strerror(errno));
- return false;
- }
-
- db_save_internal(fp, music_root);
-
- if (ferror(fp)) {
- g_set_error(error_r, simple_db_quark(), errno,
- "Failed to write to database file: %s",
- g_strerror(errno));
- fclose(fp);
- return false;
- }
-
- fclose(fp);
-
- struct stat st;
- if (stat(db->path, &st) == 0)
- db->mtime = st.st_mtime;
-
- return true;
-}
-
-time_t
-simple_db_get_mtime(const struct db *_db)
-{
- const struct simple_db *db = (const struct simple_db *)_db;
-
- assert(db != NULL);
- assert(db->root != NULL);
-
- return db->mtime;
-}