envelopetracker.h

00001 #ifndef ENVELOPETRACKER_H
00002 #define ENVELOPETRACKER_H
00003 
00004 #include "envelope.h"
00005 #include <list>
00006 class EnvelopeTracker
00007 {
00008 public:
00009     EnvelopeTracker();
00010 
00011     // parsing
00012     void parse(char *buf, int bufLength);
00013 
00014     Envelope* getEnvelope(){
00015         Envelope* ret = NULL;
00016         if(envelopeListIndexFront != -1){
00017             ret = envelopeList[envelopeListIndexFront++];
00018             envelopeListIndexFront %= envelopeListLength;
00019             if(envelopeListIndexFront == envelopeListIndex) envelopeListIndexFront = -1;
00020         }
00021         return ret;
00022     }
00023     int bufferDataLength();
00024     
00025     void resetBuffer();
00026 
00027     void setEnvelope(const Envelope &value);
00028 
00029     void setBufferLength(int value);
00030     ~EnvelopeTracker();
00031 
00032 private:
00033     // check Header
00034     bool testHeader();
00035 
00036     // check Footer
00037     bool testFooter();
00038 
00039     // test XOR
00040     bool testXOR();// set xindex as headerIndex
00041 
00042 
00043     // current header index
00044     int currentHeaderIndex;
00045     // current footer index
00046     int currentFooterIndex;
00047     int currentDataIndex;
00048     // index
00049     int currentIndex;
00050     // array
00051     char * bufferArray;
00052     int bufferLength;
00053     int bufferTailIndex;
00054 
00055     Envelope** envelopeList;
00056     int envelopeListLength;
00057     int envelopeListIndex;
00058     int envelopeListIndexFront;
00059     Envelope envelope;
00060     int envelopeLength;
00061     int envelopeDataLength;
00062     int headerLength;
00063 };
00064 
00065 #endif // ENVELOPETRACKER_H
00066