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// Copyright (C) 2019 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef IORAP_SRC_COMMON_CMD_UTILS_H_
#define IORAP_SRC_COMMON_CMD_UTILS_H_
#include <android-base/parsebool.h>
#include <android-base/properties.h>
#include <iostream>
#include <sstream>
#include <optional>
#include <vector>
namespace iorap::common {
// Create execve-compatible argv.
// The lifetime is tied to that of vector.
inline std::unique_ptr<const char*[]> VecToArgv(const char* program_name,
const std::vector<std::string>& vector) {
// include program name in argv[0]
// include a NULL sentinel in the end.
std::unique_ptr<const char*[]> ptr{new const char*[vector.size() + 2]};
// program name
ptr[0] = program_name;
// all the argv
for (size_t i = 0; i < vector.size(); ++i) {
ptr[i+1] = vector[i].c_str();
}
// null sentinel
ptr[vector.size() + 1] = nullptr;
return ptr;
}
// Appends an args to the argv.
template <class T>
void AppendArgs(std::vector<std::string>& argv,
const T& value) {
std::stringstream ss;
ss << value;
argv.push_back(ss.str());
}
// Appends an args to the argv.
template <class T, class T2>
void AppendArgs(std::vector<std::string>& argv,
const T& value,
const T2& value2) {
AppendArgs(argv, value);
AppendArgs(argv, value2);
}
// Appends a named argument to the argv.
//
// For example if <name> is "--property" and <value> is int(200):
// the string "--property=200" is appended to the argv.
template <class T, class T2>
void AppendNamedArg(std::vector<std::string>& argv,
const T& name,
const T2& value) {
std::stringstream ss;
ss << name;
ss << "=";
ss << value;
argv.push_back(ss.str());
}
// Appends args from a vector to the argv repeatedly to argv.
//
// For example, if <args> is "--timestamp" and <values> is [100, 200].
// The "--timestamp 100" and "--timestamp 200" are appended.
template <class T>
void AppendArgsRepeatedly(std::vector<std::string>& argv,
std::string args,
const std::vector<T>& values) {
for (const T& v : values) {
AppendArgs(argv, args, v);
}
}
// Appends args from a vector to the argv repeatedly to argv.
//
// For example, if values is [input1.pb, input2.pb],
// then the "input1.pb" and "input2.pb" are appended.
template <class T>
void AppendArgsRepeatedly(std::vector<std::string>& argv,
const std::vector<T>& values) {
for (const T& v : values) {
AppendArgs(argv, v);
}
}
// Appends a named argument to the argv repeatedly with different values.
//
// For example if <name> is "--property" and <value> is [int(200), int(400)]:
// the strings "--property=200" and "--property=400" are both appended to the argv.
template <class T, class T2>
void AppendNamedArgRepeatedly(std::vector<std::string>& argv,
const T& name,
const std::vector<T2>& values) {
for (const T2& v :values) {
AppendNamedArg(argv, name, v);
}
}
// Get the value of the property.
// Firstly, try to find the environment variable. If it does not exist,
// try to get the property. If neither, use the default value..
//
// For example, for prop foo.bar.baz, it will first check for
// FOO_BAR_BAZ environment variable.
inline std::string GetEnvOrProperty(const std::string& prop, const std::string& default_val) {
std::string env_str = prop;
// a.b.c -> a_b_c
std::replace(env_str.begin(), env_str.end(), '.', '_');
// a_b_c -> A_B_C
std::transform(env_str.begin(), env_str.end(), env_str.begin(), ::toupper);
char *env = getenv(env_str.c_str());
if (env) {
return std::string(env);
}
return ::android::base::GetProperty(prop, default_val);
}
// Get the boolean value of the property.
// Firstly, try to find the environment variable. If it does not exist,
// try to get the property. If neither, use the default value..
//
// For example, for prop foo.bar.baz, it will first check for
// FOO_BAR_BAZ environment variable.
inline bool GetBoolEnvOrProperty(const std::string& prop, bool default_val) {
std::string env_str = prop;
// a.b.c -> a_b_c
std::replace(env_str.begin(), env_str.end(), '.', '_');
// a_b_c -> A_B_C
std::transform(env_str.begin(), env_str.end(), env_str.begin(), ::toupper);
char *env = getenv(env_str.c_str());
if (env) {
using ::android::base::ParseBoolResult;
switch (::android::base::ParseBool(env)) {
case ParseBoolResult::kError:
break;
case ParseBoolResult::kFalse:
return false;
case ParseBoolResult::kTrue:
return true;
}
}
return ::android::base::GetBoolProperty(prop, default_val);
}
} // namespace iorap::common
#endif // IORAP_SRC_COMMON_CMD_UTILS_H_
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