1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// This file contains a class that can be used to extract the salient
// elements of a command line in a relatively lightweight manner.
// Switches can optionally have a value attached using an equals sign,
// as in "-switch=value". Arguments that aren't prefixed with a
// switch prefix are considered "loose parameters". Switch names
// are case-insensitive.
#ifndef BASE_COMMAND_LINE_H__
#define BASE_COMMAND_LINE_H__
#include <map>
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/scoped_ptr.h"
class CommandLine {
public:
// Creates a parsed version of the command line used to launch
// the current process.
CommandLine();
// Creates a parsed version of the given command-line string.
// The program name is assumed to be the first item in the string.
CommandLine(const std::wstring& command_line);
~CommandLine();
// Returns true if this command line contains the given switch.
// (Switch names are case-insensitive.)
bool HasSwitch(const std::wstring& switch_string) const;
// Returns the value associated with the given switch. If the
// switch has no value or isn't present, this method returns
// the empty string.
std::wstring GetSwitchValue(const std::wstring& switch_string) const;
// Returns the number of "loose values" found in the command line.
// Loose values are arguments that aren't switches.
// (The program name is also excluded from the set of loose values.)
size_t GetLooseValueCount() const;
typedef std::vector<std::wstring>::const_iterator LooseValueIterator;
// Returns a const_iterator to the list of loose values.
LooseValueIterator GetLooseValuesBegin() const;
// Returns the end const_iterator for the list of loose values.
LooseValueIterator GetLooseValuesEnd() const;
// Simply returns the original command line string.
std::wstring command_line_string() const;
// Returns the program part of the command line string (the first item).
std::wstring program() const;
// An array containing the prefixes that identify an argument as
// a switch.
static const wchar_t* const kSwitchPrefixes[];
// The string that's used to separate switches from their values.
static const wchar_t kSwitchValueSeparator[];
// Appends the given switch string (preceded by a space and a switch
// prefix) to the given string.
static void AppendSwitch(std::wstring* command_line_string,
const std::wstring& switch_string);
// Appends the given switch string (preceded by a space and a switch
// prefix) to the given string, with the given value attached.
static void AppendSwitchWithValue(std::wstring* command_line_string,
const std::wstring& switch_string,
const std::wstring& value_string);
private:
class Data;
// True if we are responsible for deleting our |data_| pointer. In some cases
// we cache the result of parsing the command line and |data_|'s lifetime is
// managed by someone else (e.g., the |Singleton| class).
bool we_own_data_;
// A pointer to the parsed version of the command line.
Data* data_;
DISALLOW_EVIL_CONSTRUCTORS(CommandLine);
};
#endif // BASE_COMMAND_LINE_H__
|
