ShadowStatus_t Shadow_AssembleTopicString()

in source/shadow.c [873:925]
45 lines of code
5 McCabe index (conditional complexity)

ShadowStatus_t Shadow_AssembleTopicString( ShadowTopicStringType_t topicType,
                                           const char * pThingName,
                                           uint8_t thingNameLength,
                                           const char * pShadowName,
                                           uint8_t shadowNameLength,
                                           char * pTopicBuffer,
                                           uint16_t bufferSize,
                                           uint16_t * pOutLength )
{
    uint16_t generatedTopicStringLength = 0U;

    ShadowStatus_t shadowStatus = validateAssembleTopicParameters( topicType,
                                                                   pThingName,
                                                                   thingNameLength,
                                                                   pShadowName,
                                                                   shadowNameLength,
                                                                   pTopicBuffer,
                                                                   pOutLength );

    if( shadowStatus == SHADOW_SUCCESS )
    {
        generatedTopicStringLength = SHADOW_PREFIX_LENGTH +        /* Prefix ("$aws/things/"). */
                                     thingNameLength +             /* Thing name. */
                                     ( ( shadowNameLength > 0U ) ? /* Handle named or classic shadow */
                                       ( SHADOW_NAMED_ROOT_LENGTH + shadowNameLength ) :
                                       SHADOW_CLASSIC_ROOT_LENGTH ) +
                                     getShadowOperationLength( topicType ); /* Shadow operation. */

        if( bufferSize < generatedTopicStringLength )
        {
            shadowStatus = SHADOW_BUFFER_TOO_SMALL;
            LogError( ( "Input bufferSize too small, bufferSize %u, required %u.",
                        ( unsigned int ) bufferSize,
                        ( unsigned int ) generatedTopicStringLength ) );
        }
    }

    if( shadowStatus == SHADOW_SUCCESS )
    {
        /* With everything validated, now create the topic string */
        createShadowTopicString( topicType,
                                 pThingName,
                                 thingNameLength,
                                 pShadowName,
                                 shadowNameLength,
                                 pTopicBuffer );

        /* Return the generated topic string length to the caller. */
        *pOutLength = generatedTopicStringLength;
    }

    return shadowStatus;
}