SigV4Status_t SigV4_AwsIotDateToIso8601()

in source/sigv4.c [3043:3117]
60 lines of code
10 McCabe index (conditional complexity)

SigV4Status_t SigV4_AwsIotDateToIso8601( const char * pDate,
                                         size_t dateLen,
                                         char * pDateISO8601,
                                         size_t dateISO8601Len )
{
    SigV4Status_t returnStatus = SigV4InvalidParameter;
    SigV4DateTime_t date = { 0 };
    char * pWriteLoc = pDateISO8601;
    const char * pFormatStr = NULL;
    size_t formatLen = 0U;

    /* Check for NULL parameters. */
    if( pDate == NULL )
    {
        LogError( ( "Parameter check failed: pDate is NULL." ) );
    }
    else if( pDateISO8601 == NULL )
    {
        LogError( ( "Parameter check failed: pDateISO8601 is NULL." ) );
    }
    /* Check that the date provided is of the expected length. */
    else if( ( dateLen != SIGV4_EXPECTED_LEN_RFC_3339 ) &&
             ( dateLen != SIGV4_EXPECTED_LEN_RFC_5322 ) )
    {
        LogError( ( "Parameter check failed: dateLen must be either %u or %u, "
                    "for RFC 3339 and RFC 5322 formats, respectively.",
                    SIGV4_EXPECTED_LEN_RFC_3339,
                    SIGV4_EXPECTED_LEN_RFC_5322 ) );
    }

    /* Check that the output buffer provided is large enough for the formatted
     * string. */
    else if( dateISO8601Len < SIGV4_ISO_STRING_LEN )
    {
        LogError( ( "Parameter check failed: dateISO8601Len must be at least %u.",
                    SIGV4_ISO_STRING_LEN ) );
    }
    else
    {
        /* Assign format string according to input type received. */
        pFormatStr = ( dateLen == SIGV4_EXPECTED_LEN_RFC_3339 ) ?
                     ( FORMAT_RFC_3339 ) : ( FORMAT_RFC_5322 );

        formatLen = ( dateLen == SIGV4_EXPECTED_LEN_RFC_3339 ) ?
                    ( FORMAT_RFC_3339_LEN ) : ( FORMAT_RFC_5322_LEN );

        returnStatus = parseDate( pDate, dateLen, pFormatStr, formatLen, &date );
    }

    if( returnStatus == SigV4Success )
    {
        returnStatus = validateDateTime( &date );
    }

    if( returnStatus == SigV4Success )
    {
        /* Combine date elements into complete ASCII representation, and fill
         * buffer with result. */
        intToAscii( date.year, &pWriteLoc, ISO_YEAR_LEN );
        intToAscii( date.mon, &pWriteLoc, ISO_NON_YEAR_LEN );
        intToAscii( date.mday, &pWriteLoc, ISO_NON_YEAR_LEN );
        *pWriteLoc = 'T';
        pWriteLoc++;
        intToAscii( date.hour, &pWriteLoc, ISO_NON_YEAR_LEN );
        intToAscii( date.min, &pWriteLoc, ISO_NON_YEAR_LEN );
        intToAscii( date.sec, &pWriteLoc, ISO_NON_YEAR_LEN );
        *pWriteLoc = 'Z';

        LogDebug( ( "Successfully formatted ISO 8601 date: \"%.*s\"",
                    ( int ) dateISO8601Len,
                    pDateISO8601 ) );
    }

    return returnStatus;
}