string_utils.cpp

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/*
    Beatmup image and signal processing library
    Copyright (C) 2020, lnstadrum
 
    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 3 of the License, 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.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#include "string_utils.h"
#include <algorithm>
 
using namespace Beatmup;
 
std::string StringUtils::lowercase(const std::string& str) {
    std::string result(str);
 
    std::transform(result.begin(), result.end(), result.begin(), [](char c){
        return ('A' <= c && c <= 'Z') ? c - ('A' - 'a') : c;
    });
 
    return result;
}