#include "kappa/util.hpp"
#include <algorithm>
#include <cctype>
#include <ranges>

namespace kappa::util {

std::string to_lower(std::string_view sv) {
    std::string s(sv);
    std::ranges::transform(s, s.begin(),
        [](unsigned char c) { return std::tolower(c); });
    return s;
}

std::string shell_escape(std::string_view s) {
    std::string result;
    result.reserve(s.size());
    for (char c : s) {
        if (c == '"' || c == '\\' || c == '$' || c == '`') {
            result += '\\';
        }
        result += c;
    }
    return result;
}
}