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1 /* | |
2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license | |
5 * that can be found in the LICENSE file in the root of the source | |
6 * tree. An additional intellectual property rights grant can be found | |
7 * in the file PATENTS. All contributing project authors may | |
8 * be found in the AUTHORS file in the root of the source tree. | |
9 */ | |
10 | |
11 #include "webrtc/tools/simple_command_line_parser.h" | |
12 | |
13 #include <stdio.h> | |
14 #include <stdlib.h> | |
15 | |
16 #include <string> | |
17 | |
18 namespace webrtc { | |
19 namespace test { | |
20 | |
21 CommandLineParser::CommandLineParser() {} | |
22 CommandLineParser::~CommandLineParser() {} | |
23 | |
24 void CommandLineParser::Init(int argc, char** argv) { | |
25 args_ = std::vector<std::string> (argv + 1, argv + argc); | |
26 } | |
27 | |
28 bool CommandLineParser::IsStandaloneFlag(std::string flag) { | |
29 return flag.find("=") == std::string::npos; | |
30 } | |
31 | |
32 bool CommandLineParser::IsFlagWellFormed(std::string flag) { | |
33 size_t dash_pos = flag.find("--"); | |
34 size_t equal_pos = flag.find("="); | |
35 if (dash_pos != 0) { | |
36 fprintf(stderr, "Wrong switch format: %s\n", flag.c_str()); | |
37 fprintf(stderr, "Flag doesn't start with --\n"); | |
38 return false; | |
39 } | |
40 size_t flag_length = flag.length() - 1; | |
41 | |
42 // We use 3 here because we assume that the flags are in the format | |
43 // --flag_name=flag_value, thus -- are at positions 0 and 1 and we should have | |
44 // at least one symbol for the flag name. | |
45 if (equal_pos > 0 && (equal_pos < 3 || equal_pos == flag_length)) { | |
46 fprintf(stderr, "Wrong switch format: %s\n", flag.c_str()); | |
47 fprintf(stderr, "Wrong placement of =\n"); | |
48 return false; | |
49 } | |
50 return true; | |
51 } | |
52 | |
53 std::string CommandLineParser::GetCommandLineFlagName(std::string flag) { | |
54 size_t dash_pos = flag.find("--"); | |
55 size_t equal_pos = flag.find("="); | |
56 if (equal_pos == std::string::npos) { | |
57 return flag.substr(dash_pos + 2); | |
58 } else { | |
59 return flag.substr(dash_pos + 2, equal_pos - 2); | |
60 } | |
61 } | |
62 | |
63 std::string CommandLineParser::GetCommandLineFlagValue(std::string flag) { | |
64 size_t equal_pos = flag.find("="); | |
65 if (equal_pos == std::string::npos) { | |
66 return ""; | |
67 } else { | |
68 return flag.substr(equal_pos + 1); | |
69 } | |
70 } | |
71 | |
72 void CommandLineParser::PrintEnteredFlags() { | |
73 std::map<std::string, std::string>::iterator flag_iter; | |
74 fprintf(stdout, "You have entered:\n"); | |
75 for (flag_iter = flags_.begin(); flag_iter != flags_.end(); ++flag_iter) { | |
76 if (flag_iter->first != "help") { | |
77 fprintf(stdout, "%s=%s, ", flag_iter->first.c_str(), | |
78 flag_iter->second.c_str()); | |
79 } | |
80 } | |
81 fprintf(stdout, "\n"); | |
82 } | |
83 | |
84 void CommandLineParser::ProcessFlags() { | |
85 std::map<std::string, std::string>::iterator flag_iter; | |
86 std::vector<std::string>::iterator iter; | |
87 for (iter = args_.begin(); iter != args_.end(); ++iter) { | |
88 if (!IsFlagWellFormed(*iter)) { | |
89 // Ignore badly formated flags. | |
90 continue; | |
91 } | |
92 std::string flag_name = GetCommandLineFlagName(*iter); | |
93 flag_iter = flags_.find(flag_name); | |
94 if (flag_iter == flags_.end()) { | |
95 // Ignore unknown flags. | |
96 fprintf(stdout, "Flag '%s' is not recognized\n", flag_name.c_str()); | |
97 continue; | |
98 } | |
99 if (IsStandaloneFlag(*iter)) { | |
100 flags_[flag_name] = "true"; | |
101 } else { | |
102 flags_[flag_name] = GetCommandLineFlagValue(*iter); | |
103 } | |
104 } | |
105 } | |
106 | |
107 void CommandLineParser::SetUsageMessage(std::string usage_message) { | |
108 usage_message_ = usage_message; | |
109 } | |
110 | |
111 void CommandLineParser::PrintUsageMessage() { | |
112 fprintf(stdout, "%s", usage_message_.c_str()); | |
113 } | |
114 | |
115 void CommandLineParser::SetFlag(std::string flag_name, | |
116 std::string default_flag_value) { | |
117 flags_[flag_name] = default_flag_value; | |
118 } | |
119 | |
120 std::string CommandLineParser::GetFlag(std::string flag_name) { | |
121 std::map<std::string, std::string>::iterator flag_iter; | |
122 flag_iter = flags_.find(flag_name); | |
123 // If no such flag. | |
124 if (flag_iter == flags_.end()) { | |
125 return ""; | |
126 } | |
127 return flag_iter->second; | |
128 } | |
129 | |
130 } // namespace test | |
131 } // namespace webrtc | |
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