to_hex() [1/2]

template<typename T>

fl::enable_if< fl::is_integral< T >::value, fl::string >::type fl::printf_detail::to_hex	(	T	value,
		bool	uppercase )

Definition at line 180 of file printf.h.

                                {
    if (value == 0) {
        return fl::string("0");
    }
    
    fl::string result;
    const char* digits = uppercase ? "0123456789ABCDEF" : "0123456789abcdef";
    
    // Handle negative values for signed types
    bool negative = false;
    if (fl::is_signed<T>::value && value < 0) {
        negative = true;
        value = -value;
    }
    
    while (value > 0) {
        char ch = digits[value % 16];
        // Convert char to string since fl::string::append treats char as number
        char temp_ch_str[2] = {ch, '\0'};
        fl::string digit_str(temp_ch_str);
        // Use += since + operator is not defined for fl::string
        fl::string temp = digit_str;
        temp += result;
        result = temp;
        value /= 16;
    }
    
    if (negative) {
        fl::string minus_str("-");
        minus_str += result;
        result = minus_str;
    }
    
    return result;
}

References fl::is_signed< T >::value.

Referenced by format_arg().

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