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/*
* Copyright (C) 2009,2011 Jens Georg <mail@jensge.org>,
* (C) 2013 Intel Corporation.
*
* Author: Jussi Kukkonen <jussi.kukkonen@intel.com>
*
* This file is part of Rygel.
*
* Rygel is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Rygel 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*/
using Rygel;
using Gee;
using Sqlite;
public errordomain Rygel.LMS.DatabaseError {
OPEN,
PREPARE,
BIND,
STEP,
NOT_FOUND
}
namespace Rygel.LMS {
extern static int utf8_collate_str (uint8[] a, uint8[] b);
}
public class Rygel.LMS.Database {
private Sqlite.Database db;
/**
* Function to implement the custom SQL function 'contains'
*/
private static void utf8_contains (Sqlite.Context context,
Sqlite.Value[] args)
requires (args.length == 2) {
if (args[0].to_text () == null ||
args[1].to_text () == null) {
context.result_int (0);
return;
}
var pattern = Regex.escape_string (args[1].to_text ());
if (Regex.match_simple (pattern,
args[0].to_text (),
RegexCompileFlags.CASELESS)) {
context.result_int (1);
} else {
context.result_int (0);
}
}
/**
* Function to implement the custom SQLite collation 'CASEFOLD'.
*
* Uses utf8 case-fold to compare the strings.
*/
private static int utf8_collate (int alen, void* a, int blen, void* b) {
// unowned to prevent array copy
unowned uint8[] _a = (uint8[]) a;
_a.length = alen;
unowned uint8[] _b = (uint8[]) b;
_b.length = blen;
return LMS.utf8_collate_str (_a, _b);
}
public Database (string db_path) throws DatabaseError {
Sqlite.Database.open (db_path, out this.db);
if (this.db.errcode () != Sqlite.OK) {
throw new DatabaseError.OPEN ("Failed to open '%s': %d",
db_path,
this.db.errcode);
}
this.db.create_function ("contains",
2,
Sqlite.UTF8,
null,
LMS.Database.utf8_contains,
null,
null);
this.db.create_collation ("CASEFOLD",
Sqlite.UTF8,
LMS.Database.utf8_collate);
}
public Statement prepare (string query_string) throws DatabaseError {
Statement statement;
var err = this.db.prepare_v2 (query_string, -1, out statement);
if (err != Sqlite.OK)
throw new DatabaseError.PREPARE ("Unable to create statement '%s': %d",
query_string,
err);
return statement;
}
public Statement prepare_and_init (string query,
GLib.Value[]? arguments)
throws DatabaseError {
Statement statement;
var err = this.db.prepare_v2 (query, -1, out statement);
if (err != Sqlite.OK)
throw new DatabaseError.PREPARE ("Unable to create statement '%s': %d",
query,
err);
for (var i = 1; i <= arguments.length; ++i) {
int sqlite_err;
unowned GLib.Value current_value = arguments[i - 1];
if (current_value.holds (typeof (int))) {
sqlite_err = statement.bind_int (i, current_value.get_int ());
if (sqlite_err != Sqlite.OK)
throw new DatabaseError.BIND("Unable to bind value %d",
sqlite_err);
} else if (current_value.holds (typeof (int64))) {
sqlite_err = statement.bind_int64 (i, current_value.get_int64 ());
if (sqlite_err != Sqlite.OK)
throw new DatabaseError.BIND("Unable to bind value %d",
sqlite_err);
} else if (current_value.holds (typeof (uint64))) {
sqlite_err = statement.bind_int64 (i, (int64) current_value.get_uint64 ());
if (sqlite_err != Sqlite.OK)
throw new DatabaseError.BIND("Unable to bind value %d",
sqlite_err);
} else if (current_value.holds (typeof (long))) {
sqlite_err = statement.bind_int64 (i, current_value.get_long ());
if (sqlite_err != Sqlite.OK)
throw new DatabaseError.BIND("Unable to bind value %d",
sqlite_err);
} else if (current_value.holds (typeof (uint))) {
sqlite_err = statement.bind_int64 (i, current_value.get_uint ());
if (sqlite_err != Sqlite.OK)
throw new DatabaseError.BIND("Unable to bind value %d",
sqlite_err);
} else if (current_value.holds (typeof (string))) {
sqlite_err = statement.bind_text (i, current_value.get_string ());
if (sqlite_err != Sqlite.OK)
throw new DatabaseError.BIND("Unable to bind value %d",
sqlite_err);
} else if (current_value.holds (typeof (void *))) {
if (current_value.peek_pointer () == null) {
sqlite_err = statement.bind_null (i);
if (sqlite_err != Sqlite.OK)
throw new DatabaseError.BIND("Unable to bind value %d",
sqlite_err);
} else {
assert_not_reached ();
}
} else {
var type = current_value.type ();
warning (_("Unsupported type %s"), type.name ());
assert_not_reached ();
}
}
return statement;
}
public static void find_object(string id, Statement stmt) throws DatabaseError {
(void) stmt.reset();
int integer_id = int.parse(id);
int sqlite_err = stmt.bind_int(1, integer_id);
if (sqlite_err != Sqlite.OK)
throw new DatabaseError.BIND("Unable to bind id %d", sqlite_err);
sqlite_err = stmt.step();
if (sqlite_err != Sqlite.ROW)
throw new DatabaseError.STEP("Unable to find id %s", id);
}
public static void get_children_init (Statement stmt,
uint offset, uint max_count, string sort_criteria) throws DatabaseError {
int sqlite_err;
(void) stmt.reset();
sqlite_err = stmt.bind_int(1, (int) max_count);
if (sqlite_err != Sqlite.OK)
throw new DatabaseError.BIND("Unable to bind max_count %d",
sqlite_err);
sqlite_err = stmt.bind_int(2, (int) offset);
if (sqlite_err != Sqlite.OK)
throw new DatabaseError.BIND("Unable to bind offset %d",
sqlite_err);
}
public static bool get_children_step(Statement stmt) throws DatabaseError {
bool retval;
int sqlite_err;
sqlite_err = stmt.step();
retval = sqlite_err == Sqlite.ROW;
if (!retval && (sqlite_err != Sqlite.DONE))
throw new DatabaseError.STEP("Error iterating through rows %d",
sqlite_err);
return retval;
}
}
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