to_hex()

template<typename T>

fl::string fl::to_hex	(	T	value,
		bool	uppercase = false,
		bool	pad_to_width = false )

Convert an integer value to hexadecimal string representation.

Template Parameters

T	Integral type

Parameters

value	The integer value to convert
uppercase	If true, use uppercase hex digits (A-F), otherwise lowercase (a-f)
pad_to_width	If true, pad with leading zeros to full type width (default: false for minimal representation)

Returns

Hexadecimal string representation of the value

Example usage:

fl::string hex = fl::to_hex(255, false);              // "ff" (minimal)
fl::string hex_upper = fl::to_hex(255, true);         // "FF" (minimal uppercase)
fl::string hex_padded = fl::to_hex(255, false, true); // "000000ff" (padded to int width)
fl::string hex_neg = fl::to_hex(-16, false);          // "-10"

Definition at line 517 of file string.h.

                                                                        {
    constexpr auto width = detail::get_hex_int_width<sizeof(T)>();
    bool is_negative = false;
    u64 unsigned_value;
    if (static_cast<i64>(value) < 0 && sizeof(T) <= 8) {
        is_negative = true;
        unsigned_value = static_cast<u64>(-static_cast<i64>(value));
    } else {
        unsigned_value = static_cast<u64>(value);
    }
    return detail::hex(unsigned_value, width, is_negative, uppercase, pad_to_width);
}

References FL_NOEXCEPT, fl::detail::get_hex_int_width(), fl::detail::hex(), type_rank< T >::value, and width.

Referenced by fl::printf_detail::format_arg(), and fl::printf_detail::format_arg().

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