Lemz_SwCtrlStmProj/App/scpi/parseSuffix.txt

// =================================================================================================================
 // @parseSuffix
 // "Parser-function", parses a SCPI Suffix Program Data (<SUFFIX PROGRAM DATA>)
 // References:
 //     "7.7.3 <SUFFIX PROGRAM DATA>", [1]
 //     "7.7.3.2 Encoding Syntax", [1]
 // Parameters:
 //     @xObj - parser context, must be prepared by @prepareParserContext
 // ... before each call. If it is needed to continue the processing, the
 // ... @bKeepContext parameter duing the call @prepareParserContext must 
 // ... be set to 'true', and otherwise, to restart parsing the parameter
 // ... must be set to 'false'.
 // Returns:
 //   eParserStatus_failed - error, can not parse data as a string;
 //   eParserStatus_success - success, the string has been successfully parsed;
 //   eParserStatus_need_data - warning, the string can not be parsed due to
 //                             there no enough data to process.
 eParserStatus_t parseSuffix( xParseEntry_t * xObj )
 {
     sParseEntry_t * pObj = (sParseEntry_t*)xObj;

     eParserStatus_t status = eParserStatus_invalid;
   
     if( NULL != pObj && NULL != pObj->str && 0 != ((ptrdiff_t)pObj->tail - (ptrdiff_t)pObj->head)
         && pObj->str != pObj->tail )
     {
         status = eParserStatus_need_data;  // forward status set: the default 'eParserStatus_invalid' shall
                                            // ... not be returned due to the context will be changed.

         // if the context has been cleaned up
         if( ! pObj->bContextKept )  
         {
               pObj->parseSuffix.whiteAllowed = true;  // enable white-character by default
         }

         // walk til the end of the buffer
         while( pObj->str != pObj->tail )
         {
             char character = *(pObj->str++);

             // Check if the white-character is allowed in current state:
             if( pObj->parseDemicalNumber.whiteAllowed )
             {
                // Check if the character is a white-character:
                if( scpi_iswhite( character ) )
                {
                    // skip character
                    continue;
                }
             }
         }
    }

    return status;
 }