portapack-mayhem/firmware/application/file_reader.cpp

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/*
* Copyright (C) 2023 Kyle Reed
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "file_reader.hpp"
#include <string_view>
#include <vector>
/* Splits the string on the specified char and returns
* a vector of string_views. NB: the lifetime of the
* string to split must be maintained while the views
* are used or they will dangle. */
std::vector<std::string_view> split_string(std::string_view str, char c) {
std::vector<std::string_view> cols;
size_t start = 0;
while (start < str.length()) {
auto it = str.find(c, start);
if (it == str.npos)
break;
cols.emplace_back(&str[start], it - start);
start = it + 1;
}
if (start <= str.length() && !str.empty())
cols.emplace_back(&str[start], str.length() - start);
return cols;
}