static bool _accept_char()

in Include/cpprestinclude/cpprest/streams.h [1358:1456]

• 93 lines of code
• 33 McCabe index (conditional complexity)

static bool _accept_char(std::shared_ptr<_double_state<FloatingPoint>> state, int_type ch)
{
    if ( state->minus == 0 )
    {
        if ( !::isdigit(ch) && ch != int_type('.') && ch != int_type('+') && ch != int_type('-') )
        {
            if (!state->complete)
                state->p_exception_string = create_exception_message<FloatingPoint, int_type>(ch, false);
            return false;
        }
    }
    else
    {
        if (!state->exponent && !::isdigit(ch) && ch != int_type('.') && ch != int_type('E') && ch != int_type('e'))
        {
            if (!state->complete)
                state->p_exception_string = create_exception_message<FloatingPoint, int_type>(ch, false);
            return false;
        }

        if (state->exponent && !::isdigit(ch) && ch != int_type('+') && ch != int_type('-'))
        {
            if (!state->complete)
                state->p_exception_string = create_exception_message<FloatingPoint, int_type>(ch, true);
            return false;
        }
    }

    switch (ch)
    {
        case int_type('+') :
            state->complete = false;
            if (state->exponent)
            {
                if (state->exponent_minus != 0)
                {
                    state->p_exception_string = "The exponent sign already set";
                    return false;
                }
                state->exponent_minus = 1;
            }
            else
            {
                state->minus = 1;
            }
            break;
        case int_type('-') :
            state->complete = false;
            if (state->exponent)
            {
                if (state->exponent_minus != 0)
                {
                    state->p_exception_string = "The exponent sign already set";
                    return false;
                }

                state->exponent_minus = 2;
            }
            else
            {
                state->minus = 2;
            }
            break;
        case int_type('.') :
            state->complete = false;
            if (state->after_comma > 0)
                return false;

            state->after_comma = 1;
            break;
        case int_type('E') : case int_type('e') :
            state->complete = false;
            if (state->exponent)
                return false;
            state->exponent_number = 0;
            state->exponent = true;
            break;
        default:
            state->complete = true;
            if (!state->exponent)
            {
                if (state->minus == 0)
                    state->minus = 1;

                state->result *= 10;
                state->result += int64_t(ch-int_type('0'));

                if (state->after_comma > 0)
                    state->after_comma++;
            }
            else
            {
                if (state->exponent_minus == 0) state->exponent_minus = 1;
                state->exponent_number *= 10;
                state->exponent_number += int64_t(ch-int_type('0'));
            }
    }
    return true;
}