openFPGALoader/src/common.cpp

43 lines
1.0 KiB
C++

// SPDX-License-Identifier: Apache-2.0
/*
* Copyright (C) 2023 Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
*/
#include "common.hpp"
#include <cstdlib>
#include <string>
#include <vector>
/*!
* \brief return shell environment variable value
* \param[in] key: variable name
* \return variable value or ""
*/
const std::string get_shell_env_var(const char* key,
const char *def_val) noexcept {
const char* ret = std::getenv(key);
return std::string(ret ? ret : def_val);
}
/*!
* \brief convert a string, separate by delim to a vector
* \param[in] in: string to split
* \param[in] delim: split caracter
* \return vector a substring
*/
const std::vector<std::string> splitString(const std::string& in,
const char delim) noexcept {
std::vector<std::string> tokens;
size_t start = 0, end = 0;
while ((end = in.find(delim, start)) != std::string::npos) {
tokens.push_back(in.substr(start, end - start));
start = end + 1;
}
tokens.push_back(in.substr(start)); // Add the last token
return tokens;
}