1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef AAPT_FLAGS_H
18#define AAPT_FLAGS_H
19
20#include "util/Maybe.h"
21#include "util/StringPiece.h"
22
23#include <functional>
24#include <ostream>
25#include <string>
26#include <vector>
27
28namespace aapt {
29
30class Flags {
31public:
32    Flags& requiredFlag(const StringPiece& name, const StringPiece& description,
33                        std::string* value);
34    Flags& requiredFlagList(const StringPiece& name, const StringPiece& description,
35                            std::vector<std::string>* value);
36    Flags& optionalFlag(const StringPiece& name, const StringPiece& description,
37                        Maybe<std::string>* value);
38    Flags& optionalFlagList(const StringPiece& name, const StringPiece& description,
39                            std::vector<std::string>* value);
40    Flags& optionalSwitch(const StringPiece& name, const StringPiece& description,
41                          bool* value);
42
43    void usage(const StringPiece& command, std::ostream* out);
44
45    bool parse(const StringPiece& command, const std::vector<StringPiece>& args,
46               std::ostream* outError);
47
48    const std::vector<std::string>& getArgs();
49
50private:
51    struct Flag {
52        std::string name;
53        std::string description;
54        std::function<bool(const StringPiece& value)> action;
55        bool required;
56        size_t numArgs;
57
58        bool parsed;
59    };
60
61    std::vector<Flag> mFlags;
62    std::vector<std::string> mArgs;
63};
64
65} // namespace aapt
66
67#endif // AAPT_FLAGS_H
68