string.hpp

Go to the documentation of this file.

/*
 * SPDX-FileCopyrightText: 2024 M5Stack Technology CO LTD
 *
 * SPDX-License-Identifier: MIT
 */
#ifndef M5_UTILITY_STRING_HPP
#define M5_UTILITY_STRING_HPP
 
#include <string>
#include <cstdint>
 
namespace m5 {
namespace utility {
 
std::string formatString(const char* fmt, ...);
 
 
std::string& trimRight(std::string& s);
std::string& trimLeft(std::string& s);
std::string& trim(std::string& s);
 
 
template <bool Case = true>
constexpr char uintToHexChar(const uint8_t v)
{
    return (v & 0x0F) < 10 ? '0' + (v & 0x0F) : (Case ? 'A' : 'a') + ((v & 0x0F) - 10);
}
 
template <typename T, bool Case = true>
std::string unsignedToHexString(const T& v)
{
    static_assert(std::is_integral<T>::value && std::is_unsigned<T>::value, "T must be unsigned integer");
    std::string s;
    for (size_t i = sizeof(T); i > 0; --i) {
        uint8_t u8 = (v >> ((i - 1) * 8)) & 0xFF;
        s += uintToHexChar<Case>((u8 >> 4) & 0x0F);
        s += uintToHexChar<Case>(u8 & 0x0F);
    }
    return s;
}
 
}  // namespace utility
}  // namespace m5
#endif