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-rw-r--r--src/database.c355
1 files changed, 60 insertions, 295 deletions
diff --git a/src/database.c b/src/database.c
index 9f29f95e1..9c4d90a2b 100644
--- a/src/database.c
+++ b/src/database.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * 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
@@ -19,14 +19,16 @@
#include "config.h"
#include "database.h"
+#include "db_error.h"
+#include "db_save.h"
+#include "db_selection.h"
+#include "db_visitor.h"
+#include "db_plugin.h"
+#include "db/simple_db_plugin.h"
#include "directory.h"
-#include "directory_save.h"
-#include "song.h"
-#include "path.h"
#include "stats.h"
-#include "text_file.h"
-#include "tag.h"
-#include "tag_internal.h"
+#include "conf.h"
+#include "glib_compat.h"
#include <glib.h>
@@ -35,81 +37,58 @@
#include <unistd.h>
#include <assert.h>
#include <string.h>
-#include <stdlib.h>
#include <errno.h>
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "database"
-#define DIRECTORY_INFO_BEGIN "info_begin"
-#define DIRECTORY_INFO_END "info_end"
-#define DB_FORMAT_PREFIX "format: "
-#define DIRECTORY_MPD_VERSION "mpd_version: "
-#define DIRECTORY_FS_CHARSET "fs_charset: "
-#define DB_TAG_PREFIX "tag: "
+static struct db *db;
+static bool db_is_open;
-enum {
- DB_FORMAT = 1,
-};
-
-static char *database_path;
-
-static struct directory *music_root;
-
-static time_t database_mtime;
-
-/**
- * The quark used for GError.domain.
- */
-static inline GQuark
-db_quark(void)
+bool
+db_init(const struct config_param *path, GError **error_r)
{
- return g_quark_from_static_string("database");
-}
+ assert(db == NULL);
+ assert(!db_is_open);
-void
-db_init(const char *path)
-{
- database_path = g_strdup(path);
+ if (path == NULL)
+ return true;
- if (path != NULL)
- music_root = directory_new("", NULL);
-}
+ struct config_param *param = config_new_param("database", path->line);
+ config_add_block_param(param, "path", path->value, path->line);
-void
-db_finish(void)
-{
- assert((database_path == NULL) == (music_root == NULL));
+ db = db_plugin_new(&simple_db_plugin, param, error_r);
- if (music_root != NULL)
- directory_free(music_root);
+ config_param_free(param);
- g_free(database_path);
+ return db != NULL;
}
void
-db_clear(void)
+db_finish(void)
{
- assert(music_root != NULL);
+ if (db_is_open)
+ db_plugin_close(db);
- directory_free(music_root);
- music_root = directory_new("", NULL);
+ if (db != NULL)
+ db_plugin_free(db);
}
struct directory *
db_get_root(void)
{
- assert(music_root != NULL);
+ assert(db != NULL);
- return music_root;
+ return simple_db_get_root(db);
}
struct directory *
db_get_directory(const char *name)
{
- if (music_root == NULL)
+ if (db == NULL)
return NULL;
+ struct directory *music_root = db_get_root();
if (name == NULL)
return music_root;
@@ -123,281 +102,67 @@ db_get_song(const char *file)
g_debug("get song: %s", file);
- if (music_root == NULL)
+ if (db == NULL)
return NULL;
- return directory_lookup_song(music_root, file);
+ return db_plugin_get_song(db, file, NULL);
}
-int
-db_walk(const char *name,
- int (*forEachSong)(struct song *, void *),
- int (*forEachDir)(struct directory *, void *), void *data)
+bool
+db_visit(const struct db_selection *selection,
+ const struct db_visitor *visitor, void *ctx,
+ GError **error_r)
{
- struct directory *directory;
-
- if (music_root == NULL)
- return -1;
-
- if ((directory = db_get_directory(name)) == NULL) {
- struct song *song;
- if ((song = db_get_song(name)) && forEachSong) {
- return forEachSong(song, data);
- }
- return -1;
+ if (db == NULL) {
+ g_set_error_literal(error_r, db_quark(), DB_DISABLED,
+ "No database");
+ return false;
}
- return directory_walk(directory, forEachSong, forEachDir, data);
+ return db_plugin_visit(db, selection, visitor, ctx, error_r);
}
bool
-db_check(void)
+db_walk(const char *uri,
+ const struct db_visitor *visitor, void *ctx,
+ GError **error_r)
{
- struct stat st;
-
- assert(database_path != NULL);
-
- /* Check if the file exists */
- if (access(database_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(database_path);
-
- /* Check that the parent part of the path is a directory */
- if (stat(dirPath, &st) < 0) {
- g_free(dirPath);
- g_warning("Couldn't stat parent directory of db file "
- "\"%s\": %s", database_path, strerror(errno));
- return false;
- }
-
- if (!S_ISDIR(st.st_mode)) {
- g_free(dirPath);
- g_warning("Couldn't create db file \"%s\" because the "
- "parent path is not a directory", database_path);
- return false;
- }
-
- /* Check if we can write to the directory */
- if (access(dirPath, X_OK | W_OK)) {
- g_warning("Can't create db file in \"%s\": %s",
- dirPath, strerror(errno));
- g_free(dirPath);
- return false;
- }
-
- g_free(dirPath);
-
- return true;
- }
-
- /* Path exists, now check if it's a regular file */
- if (stat(database_path, &st) < 0) {
- g_warning("Couldn't stat db file \"%s\": %s",
- database_path, strerror(errno));
- return false;
- }
+ struct db_selection selection;
+ db_selection_init(&selection, uri, true);
- if (!S_ISREG(st.st_mode)) {
- g_warning("db file \"%s\" is not a regular file", database_path);
- return false;
- }
-
- /* And check that we can write to it */
- if (access(database_path, R_OK | W_OK)) {
- g_warning("Can't open db file \"%s\" for reading/writing: %s",
- database_path, strerror(errno));
- return false;
- }
-
- return true;
+ return db_visit(&selection, visitor, ctx, error_r);
}
bool
-db_save(void)
+db_save(GError **error_r)
{
- FILE *fp;
- struct stat st;
-
- assert(database_path != NULL);
- assert(music_root != NULL);
+ assert(db != NULL);
+ assert(db_is_open);
- g_debug("removing empty directories from DB");
- directory_prune_empty(music_root);
-
- g_debug("sorting DB");
-
- directory_sort(music_root);
-
- g_debug("writing DB");
-
- fp = fopen(database_path, "w");
- if (!fp) {
- g_warning("unable to write to db file \"%s\": %s",
- database_path, strerror(errno));
- return false;
- }
-
- fprintf(fp, "%s\n", DIRECTORY_INFO_BEGIN);
- fprintf(fp, DB_FORMAT_PREFIX "%u\n", DB_FORMAT);
- fprintf(fp, "%s%s\n", DIRECTORY_MPD_VERSION, VERSION);
- fprintf(fp, "%s%s\n", DIRECTORY_FS_CHARSET, path_get_fs_charset());
-
- for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i)
- if (!ignore_tag_items[i])
- fprintf(fp, DB_TAG_PREFIX "%s\n", tag_item_names[i]);
-
- fprintf(fp, "%s\n", DIRECTORY_INFO_END);
-
- directory_save(fp, music_root);
-
- if (ferror(fp)) {
- g_warning("Failed to write to database file: %s",
- strerror(errno));
- fclose(fp);
- return false;
- }
-
- fclose(fp);
-
- if (stat(database_path, &st) == 0)
- database_mtime = st.st_mtime;
-
- return true;
+ return simple_db_save(db, error_r);
}
bool
db_load(GError **error)
{
- FILE *fp = NULL;
- struct stat st;
- GString *buffer = g_string_sized_new(1024);
- char *line;
- int format = 0;
- bool found_charset = false, found_version = false;
- bool success;
- bool tags[TAG_NUM_OF_ITEM_TYPES];
-
- assert(database_path != NULL);
- assert(music_root != NULL);
-
- fp = fopen(database_path, "r");
- if (fp == NULL) {
- g_set_error(error, db_quark(), errno,
- "Failed to open database file \"%s\": %s",
- database_path, strerror(errno));
- g_string_free(buffer, true);
- return false;
- }
-
- /* get initial info */
- line = read_text_line(fp, buffer);
- if (line == NULL || strcmp(DIRECTORY_INFO_BEGIN, line) != 0) {
- fclose(fp);
- g_set_error(error, db_quark(), 0, "Database corrupted");
- g_string_free(buffer, true);
- return false;
- }
-
- memset(tags, false, sizeof(tags));
-
- while ((line = read_text_line(fp, buffer)) != NULL &&
- strcmp(line, DIRECTORY_INFO_END) != 0) {
- if (g_str_has_prefix(line, DB_FORMAT_PREFIX)) {
- format = atoi(line + sizeof(DB_FORMAT_PREFIX) - 1);
- } else if (g_str_has_prefix(line, DIRECTORY_MPD_VERSION)) {
- if (found_version) {
- fclose(fp);
- g_set_error(error, db_quark(), 0,
- "Duplicate version line");
- g_string_free(buffer, true);
- return false;
- }
-
- found_version = true;
- } else if (g_str_has_prefix(line, DIRECTORY_FS_CHARSET)) {
- const char *new_charset, *old_charset;
-
- if (found_charset) {
- fclose(fp);
- g_set_error(error, db_quark(), 0,
- "Duplicate charset line");
- g_string_free(buffer, true);
- return false;
- }
-
- found_charset = true;
-
- new_charset = line + sizeof(DIRECTORY_FS_CHARSET) - 1;
- old_charset = path_get_fs_charset();
- if (old_charset != NULL
- && strcmp(new_charset, old_charset)) {
- fclose(fp);
- g_set_error(error, db_quark(), 0,
- "Existing database has charset "
- "\"%s\" instead of \"%s\"; "
- "discarding database file",
- new_charset, old_charset);
- g_string_free(buffer, true);
- return false;
- }
- } else if (g_str_has_prefix(line, DB_TAG_PREFIX)) {
- const char *name = line + sizeof(DB_TAG_PREFIX) - 1;
- enum tag_type tag = tag_name_parse(name);
- if (tag == TAG_NUM_OF_ITEM_TYPES) {
- g_set_error(error, db_quark(), 0,
- "Unrecognized tag '%s', "
- "discarding database file",
- name);
- return false;
- }
-
- tags[tag] = true;
- } else {
- fclose(fp);
- g_set_error(error, db_quark(), 0,
- "Malformed line: %s", line);
- g_string_free(buffer, true);
- return false;
- }
- }
+ assert(db != NULL);
+ assert(!db_is_open);
- if (format != DB_FORMAT) {
- g_set_error(error, db_quark(), 0,
- "Database format mismatch, "
- "discarding database file");
+ if (!db_plugin_open(db, error))
return false;
- }
-
- for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i) {
- if (!ignore_tag_items[i] && !tags[i]) {
- g_set_error(error, db_quark(), 0,
- "Tag list mismatch, "
- "discarding database file");
- return false;
- }
- }
-
- g_debug("reading DB");
- success = directory_load(fp, music_root, buffer, error);
- g_string_free(buffer, true);
- fclose(fp);
-
- if (!success)
- return false;
+ db_is_open = true;
stats_update();
- if (stat(database_path, &st) == 0)
- database_mtime = st.st_mtime;
-
return true;
}
time_t
db_get_mtime(void)
{
- return database_mtime;
+ assert(db != NULL);
+ assert(db_is_open);
+
+ return simple_db_get_mtime(db);
}