HTTPStatus_t HTTPClient_AddRangeHeader()

in source/core_http_client.c [1714:1775]
60 lines of code
10 McCabe index (conditional complexity)

HTTPStatus_t HTTPClient_AddRangeHeader( HTTPRequestHeaders_t * pRequestHeaders,
                                        int32_t rangeStartOrlastNbytes,
                                        int32_t rangeEnd )
{
    HTTPStatus_t returnStatus = HTTPSuccess;

    if( pRequestHeaders == NULL )
    {
        LogError( ( "Parameter check failed: pRequestHeaders is NULL." ) );
        returnStatus = HTTPInvalidParameter;
    }
    else if( pRequestHeaders->pBuffer == NULL )
    {
        LogError( ( "Parameter check failed: pRequestHeaders->pBuffer is NULL." ) );
        returnStatus = HTTPInvalidParameter;
    }
    else if( pRequestHeaders->headersLen > pRequestHeaders->bufferLen )
    {
        LogError( ( "Parameter check failed: pRequestHeaders->headersLen > pRequestHeaders->bufferLen." ) );
        returnStatus = HTTPInvalidParameter;
    }
    else if( rangeEnd < HTTP_RANGE_REQUEST_END_OF_FILE )
    {
        LogError( ( "Parameter check failed: rangeEnd is invalid: "
                    "rangeEnd should be >=-1: RangeEnd=%ld", ( long int ) rangeEnd ) );
        returnStatus = HTTPInvalidParameter;
    }
    else if( ( rangeStartOrlastNbytes < 0 ) &&
             ( rangeEnd != HTTP_RANGE_REQUEST_END_OF_FILE ) )
    {
        LogError( ( "Parameter check failed: Invalid range values: "
                    "rangeEnd should be -1 when rangeStart < 0: "
                    "RangeStart=%ld, RangeEnd=%ld",
                    ( long int ) rangeStartOrlastNbytes, ( long int ) rangeEnd ) );
        returnStatus = HTTPInvalidParameter;
    }
    else if( ( rangeEnd != HTTP_RANGE_REQUEST_END_OF_FILE ) &&
             ( rangeStartOrlastNbytes > rangeEnd ) )
    {
        LogError( ( "Parameter check failed: Invalid range values: "
                    "rangeStart should be < rangeEnd when both are >= 0: "
                    "RangeStart=%ld, RangeEnd=%ld",
                    ( long int ) rangeStartOrlastNbytes, ( long int ) rangeEnd ) );
        returnStatus = HTTPInvalidParameter;
    }
    else if( rangeStartOrlastNbytes == INT32_MIN )
    {
        LogError( ( "Parameter check failed: Arithmetic overflow detected: "
                    "rangeStart should be > -2147483648 (INT32_MIN): "
                    "RangeStart=%ld",
                    ( long int ) rangeStartOrlastNbytes ) );
        returnStatus = HTTPInvalidParameter;
    }
    else
    {
        returnStatus = addRangeHeader( pRequestHeaders,
                                       rangeStartOrlastNbytes,
                                       rangeEnd );
    }

    return returnStatus;
}