JobsStatus_t Jobs_MatchTopic()

in source/jobs.c [606:659]
45 lines of code
13 McCabe index (conditional complexity)

JobsStatus_t Jobs_MatchTopic( char * topic,
                              size_t length,
                              const char * thingName,
                              uint16_t thingNameLength,
                              JobsTopic_t * outApi,
                              char ** outJobId,
                              uint16_t * outJobIdLength )
{
    JobsStatus_t ret = JobsBadParameter;
    JobsTopic_t api = JobsInvalidTopic;
    char * jobId = NULL;
    uint16_t jobIdLength = 0U;

    if( ( topic != NULL ) && ( outApi != NULL ) && checkThingParams() && ( length > 0U ) )
    {
        ret = JobsNoMatch;

        if( ( length > JOBS_API_COMMON_LENGTH( thingNameLength ) ) &&
            ( length < JOBS_API_MAX_LENGTH( thingNameLength ) ) )
        {
            char * prefix = topic;
            char * name = &prefix[ JOBS_API_PREFIX_LENGTH ];
            char * bridge = &name[ thingNameLength ];

            /* check the shortest match first */
            if( ( strnEquals( bridge, JOBS_API_BRIDGE, JOBS_API_BRIDGE_LENGTH ) == JobsSuccess ) &&
                ( strnEquals( prefix, JOBS_API_PREFIX, JOBS_API_PREFIX_LENGTH ) == JobsSuccess ) &&
                ( strnEquals( name, thingName, thingNameLength ) == JobsSuccess ) )
            {
                char * tail = &bridge[ JOBS_API_BRIDGE_LENGTH ];
                size_t tailLength = length - JOBS_API_COMMON_LENGTH( thingNameLength );

                ret = matchApi( tail, tailLength, &api, &jobId, &jobIdLength );
            }
        }
    }

    if( outApi != NULL )
    {
        *outApi = api;
    }

    if( outJobId != NULL )
    {
        *outJobId = jobId;
    }

    if( outJobIdLength != NULL )
    {
        *outJobIdLength = jobIdLength;
    }

    return ret;
}