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CommandListBuilder.hxx
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1 /*
2 * Copyright 2003-2017 The Music Player Daemon Project
3 * http://www.musicpd.org
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #ifndef MPD_COMMAND_LIST_BUILDER_HXX
21 #define MPD_COMMAND_LIST_BUILDER_HXX
22
23 #include <list>
24 #include <string>
25
26 #include <assert.h>
27
28 class CommandListBuilder {
32 enum class Mode {
36 DISABLED = -1,
37
41 ENABLED = false,
42
46 OK = true,
47 } mode;
48
52 std::list<std::string> list;
53
57 size_t size;
58
59 public:
60 CommandListBuilder()
61 :mode(Mode::DISABLED) {}
62
66 bool IsActive() const {
67 return mode != Mode::DISABLED;
68 }
69
73 bool IsOKMode() const {
74 assert(IsActive());
75
76 return (bool)mode;
77 }
78
82 void Reset();
83
87 void Begin(bool ok) {
88 assert(list.empty());
89 assert(mode == Mode::DISABLED);
90
91 mode = (Mode)ok;
92 size = 0;
93 }
94
98 bool Add(const char *cmd);
99
103 std::list<std::string> &&Commit() {
104 assert(IsActive());
105
106 return std::move(list);
107 }
108 };
109
110 #endif
CommandListBuilder::IsOKMode
bool IsOKMode() const
Is the object in "list_OK" mode?
Definition: CommandListBuilder.hxx:73
CommandListBuilder
Definition: CommandListBuilder.hxx:28
CommandListBuilder::Commit
std::list< std::string > && Commit()
Finishes the list and returns it.
Definition: CommandListBuilder.hxx:103
CommandListBuilder::Begin
void Begin(bool ok)
Begin building a command list.
Definition: CommandListBuilder.hxx:87
CommandListBuilder::Add
bool Add(const char *cmd)
CommandListBuilder::Mode::ENABLED
Enabled in normal list mode.
CommandListBuilder::Mode::OK
Enabled in "list_OK" mode.
CommandListBuilder::IsActive
bool IsActive() const
Is a command list currently being built?
Definition: CommandListBuilder.hxx:66
CommandListBuilder::Mode::DISABLED
Not active.
CommandListBuilder::Reset
void Reset()
Reset the object: delete the list and clear the mode.
CommandListBuilder::CommandListBuilder
CommandListBuilder()
Definition: CommandListBuilder.hxx:60
DatabaseErrorCode::DISABLED
The database is disabled, i.e.