int configuration_reader_get_uint8_t()

in src/configuration_reader.c [88:158]

• 58 lines of code
• 14 McCabe index (conditional complexity)

int configuration_reader_get_uint8_t(IFabricCodePackageActivationContext* activation_context, const wchar_t* config_package_name, const wchar_t* section_name, const wchar_t* parameter_name, uint8_t* value)
{
    int result;

    if (
        /*Codes_SRS_CONFIGURATION_READER_01_001: [ If activation_context is NULL then configuration_reader_get_uint8_t shall fail and return a non-zero value. ]*/
        activation_context == NULL ||
        /*Codes_SRS_CONFIGURATION_READER_01_002: [ If config_package_name is NULL or empty then configuration_reader_get_uint8_t shall fail and return a non-zero value. ]*/
        (config_package_name == NULL || config_package_name[0] == L'\0') ||
        /*Codes_SRS_CONFIGURATION_READER_01_003: [ If section_name is NULL or empty then configuration_reader_get_uint8_t shall fail and return a non-zero value. ]*/
        (section_name == NULL || section_name[0] == L'\0') ||
        /*Codes_SRS_CONFIGURATION_READER_01_004: [ If parameter_name is NULL or empty then configuration_reader_get_uint8_t shall fail and return a non-zero value. ]*/
        (parameter_name == NULL || parameter_name[0] == L'\0') ||
        /*Codes_SRS_CONFIGURATION_READER_01_005: [ If value is NULL then configuration_reader_get_uint8_t shall fail and return a non-zero value. ]*/
        (value == NULL)
        )
    {
        LogError("Invalid args: IFabricCodePackageActivationContext* activation_context = %p, const wchar_t* config_package_name = %ls, const wchar_t* section_name = %ls, const wchar_t* parameter_name = %ls, uint8_t* value = %p",
            activation_context, MU_WP_OR_NULL(config_package_name), MU_WP_OR_NULL(section_name), MU_WP_OR_NULL(parameter_name), value);
        result = MU_FAILURE;
    }
    else
    {
        IFabricConfigurationPackage* fabric_configuration_package;
        const wchar_t* wchar_value;
        if (get_string_value_from_package(activation_context, config_package_name, section_name, parameter_name, &fabric_configuration_package, &wchar_value) != 0)
        {
            // already logged error
            result = MU_FAILURE;
        }
        else
        {
            /*Codes_SRS_CONFIGURATION_READER_01_008: [ configuration_reader_get_uint8_t shall convert the value to uint8_t and store it in value. ]*/
            wchar_t* end_ptr;
            uint64_t temp = wcstoull(wchar_value, &end_ptr, 10);
            if (end_ptr == wchar_value)
            {
                /*Codes_SRS_CONFIGURATION_READER_42_021: [ If there are any other failures then configuration_reader_get_uint8_t shall fail and return a non-zero value. ]*/
                LogError("failure in wcstoull(%ls): subject sequence is empty or does not have the expected form (config_package_name:%ls, section_name:%ls, parameter_name:%ls)",
                    wchar_value, config_package_name, section_name, parameter_name);
                result = MU_FAILURE;
            }
            else
            {
                if ((temp == ULLONG_MAX) && (errno == ERANGE))
                {
                    /*Codes_SRS_CONFIGURATION_READER_01_009: [ If the value is outside the range of representable values then configuration_reader_get_uint8_t shall fail and return a non-zero value. ]*/
                    LogError("ULLONGMAX was returned for wcstoull(%ls), indicating the correct value is outside the range of representable values (config_package_name:%ls, section_name:%ls, parameter_name:%ls)",
                        wchar_value, config_package_name, section_name, parameter_name);
                    result = MU_FAILURE;
                }
                else if (temp > UINT8_MAX)
                {
                    /*Codes_SRS_CONFIGURATION_READER_01_009: [ If the value is outside the range of representable values then configuration_reader_get_uint8_t shall fail and return a non-zero value. ]*/
                    LogError("The value %" PRIu64 " is too large for uint8_t (config_package_name:%ls, section_name:%ls, parameter_name:%ls)",
                        temp, config_package_name, section_name, parameter_name);
                    result = MU_FAILURE;
                }
                else
                {
                    /*Codes_SRS_CONFIGURATION_READER_01_011: [ configuration_reader_get_uint8_t shall succeed and return 0. ]*/
                    *value = (uint8_t)temp;
                    result = 0;
                }
            }
            (void)fabric_configuration_package->lpVtbl->Release(fabric_configuration_package);
        }
    }

    return result;
}