static TopicFormatSuffix_t parseTopicFormatSuffix()

in source/fleet_provisioning.c [375:432]
46 lines of code
4 McCabe index (conditional complexity)

static TopicFormatSuffix_t parseTopicFormatSuffix( const char * pRemainingTopic,
                                                   uint16_t remainingLength )
{
    /* Table of JSON format and suffixes in same order as TopicSuffix_t. */
    static const TopicFormatSuffix_t jsonSuffixes[] =
    {
        TopicJsonPublish,
        TopicJsonAccepted,
        TopicJsonRejected,
        TopicInvalidFormatSuffix
    };
    /* Table of CBOR format and suffixes in same order as TopicSuffix_t. */
    static const TopicFormatSuffix_t cborSuffixes[] =
    {
        TopicCborPublish,
        TopicCborAccepted,
        TopicCborRejected,
        TopicInvalidFormatSuffix
    };
    TopicFormatSuffix_t ret = TopicInvalidFormatSuffix;
    TopicSuffix_t suffix = TopicInvalidSuffix;
    FleetProvisioningStatus_t status = FleetProvisioningNoMatch;
    const char * pTopicCursor = pRemainingTopic;
    uint16_t cursorLength = remainingLength;

    assert( pRemainingTopic != NULL );

    /* Check if JSON format */
    status = consumeIfMatch( &pTopicCursor,
                             &cursorLength,
                             FP_API_JSON_FORMAT,
                             FP_API_LENGTH_JSON_FORMAT );

    if( status == FleetProvisioningSuccess )
    {
        /* Match suffix */
        suffix = parseTopicSuffix( pTopicCursor, cursorLength );
        ret = jsonSuffixes[ suffix ];
    }

    if( status == FleetProvisioningNoMatch )
    {
        /* Check if CBOR format */
        status = consumeIfMatch( &pTopicCursor,
                                 &cursorLength,
                                 FP_API_CBOR_FORMAT,
                                 FP_API_LENGTH_CBOR_FORMAT );

        if( status == FleetProvisioningSuccess )
        {
            /* Match suffix */
            suffix = parseTopicSuffix( pTopicCursor, cursorLength );
            ret = cborSuffixes[ suffix ];
        }
    }

    return ret;
}