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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/tools/simple_command_line_parser.h"
#include <stdio.h>
#include <stdlib.h>
#include <string>
namespace webrtc {
namespace test {
using std::string;
CommandLineParser::CommandLineParser() {}
CommandLineParser::~CommandLineParser() {}
void CommandLineParser::Init(int argc, char** argv) {
args_ = std::vector<std::string> (argv + 1, argv + argc);
}
bool CommandLineParser::IsStandaloneFlag(std::string flag) {
return flag.find("=") == string::npos;
}
bool CommandLineParser::IsFlagWellFormed(std::string flag) {
size_t dash_pos = flag.find("--");
size_t equal_pos = flag.find("=");
if (dash_pos != 0) {
fprintf(stderr, "Wrong switch format: %s\n", flag.c_str());
fprintf(stderr, "Flag doesn't start with --\n");
return false;
}
size_t flag_length = flag.length() - 1;
// We use 3 here because we assume that the flags are in the format
// --flag_name=flag_value, thus -- are at positions 0 and 1 and we should have
// at least one symbol for the flag name.
if (equal_pos > 0 && (equal_pos < 3 || equal_pos == flag_length)) {
fprintf(stderr, "Wrong switch format: %s\n", flag.c_str());
fprintf(stderr, "Wrong placement of =\n");
return false;
}
return true;
}
std::string CommandLineParser::GetCommandLineFlagName(std::string flag) {
size_t dash_pos = flag.find("--");
size_t equal_pos = flag.find("=");
if (equal_pos == string::npos) {
return flag.substr(dash_pos + 2);
} else {
return flag.substr(dash_pos + 2, equal_pos - 2);
}
}
std::string CommandLineParser::GetCommandLineFlagValue(std::string flag) {
size_t equal_pos = flag.find("=");
if (equal_pos == string::npos) {
return "";
} else {
return flag.substr(equal_pos + 1);
}
}
void CommandLineParser::PrintEnteredFlags() {
std::map<std::string, std::string>::iterator flag_iter;
fprintf(stdout, "You have entered:\n");
for (flag_iter = flags_.begin(); flag_iter != flags_.end(); ++flag_iter) {
if (flag_iter->first != "help") {
fprintf(stdout, "%s=%s, ", flag_iter->first.c_str(),
flag_iter->second.c_str());
}
}
fprintf(stdout, "\n");
}
void CommandLineParser::ProcessFlags() {
std::map<std::string, std::string>::iterator flag_iter;
std::vector<std::string>::iterator iter;
for (iter = args_.begin(); iter != args_.end(); ++iter) {
if (!IsFlagWellFormed(*iter)) {
// Ignore badly formated flags.
continue;
}
std::string flag_name = GetCommandLineFlagName(*iter);
flag_iter = flags_.find(flag_name);
if (flag_iter == flags_.end()) {
// Ignore unknown flags.
fprintf(stdout, "Flag '%s' is not recognized\n", flag_name.c_str());
continue;
}
if (IsStandaloneFlag(*iter)) {
flags_[flag_name] = "true";
} else {
flags_[flag_name] = GetCommandLineFlagValue(*iter);
}
}
}
void CommandLineParser::SetUsageMessage(std::string usage_message) {
usage_message_ = usage_message;
}
void CommandLineParser::PrintUsageMessage() {
fprintf(stdout, "%s", usage_message_.c_str());
}
void CommandLineParser::SetFlag(std::string flag_name,
std::string default_flag_value) {
flags_[flag_name] = default_flag_value;
}
std::string CommandLineParser::GetFlag(std::string flag_name) {
std::map<std::string, std::string>::iterator flag_iter;
flag_iter = flags_.find(flag_name);
// If no such flag.
if (flag_iter == flags_.end()) {
return "";
}
return flag_iter->second;
}
} // namespace test
} // namespace webrtc
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