writing and reading problem

[seniorc]

Hello,writing codes here

//Writing size of map
    uint16_t streamOffset = (sizeof(int)+sizeof(char))*FrekMap.size()+sizeof(uint16_t);
    codefile.write(reinterpret_cast<char*>(&streamOffset),sizeof(uint16_t));
    //Writing map
    for (QMap<char,int>::Iterator it = FrekMap.begin(); it != FrekMap.end(); ++it) {
       codefile.putChar(it.key());
       codefile.write(reinterpret_cast<char*>(&(it.value())), sizeof(int));
    }
    //Writing lenght last byte
    codefile.putChar(compressed.length()%8);
    while(compressed.length()%8!=0)
        compressed.push_back('0');
    //Writing code
    compressedData=compressed.constData();
    for(int i = 0; i < compressed.size(); i++ )
    {
        if( compressedData[i] == ZeroBit )
            k++;
        else if( compressedData[i] == OneBit )
        {
            buff |= bits[k];
            k++;
        }
        if( k == 8 )
        {
            codefile.write(reinterpret_cast<char *>(&buff),sizeof(unsigned char));
            buff = 0;
            k    = 0;
        }
    }

//Writing size of map
    uint16_t streamOffset = (sizeof(int)+sizeof(char))*FrekMap.size()+sizeof(uint16_t);
    codefile.write(reinterpret_cast<char*>(&streamOffset),sizeof(uint16_t));
    //Writing map
    for (QMap<char,int>::Iterator it = FrekMap.begin(); it != FrekMap.end(); ++it) {
       codefile.putChar(it.key());
       codefile.write(reinterpret_cast<char*>(&(it.value())), sizeof(int));
    }
    //Writing lenght last byte
    codefile.putChar(compressed.length()%8);
    while(compressed.length()%8!=0)
        compressed.push_back('0');
    //Writing code
    compressedData=compressed.constData();
    for(int i = 0; i < compressed.size(); i++ )
    {
        if( compressedData[i] == ZeroBit )
            k++;
        else if( compressedData[i] == OneBit )
        {
            buff |= bits[k];
            k++;
        }
        if( k == 8 )
        {
            codefile.write(reinterpret_cast<char *>(&buff),sizeof(unsigned char));
            buff = 0;
            k    = 0;
        }
    }

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Reading codes here

//read size of map
    readData.read(reinterpret_cast<char*>(&sizeMap),sizeof(sizeMap));
    //read map
    for (int i=sizeof(uint16_t);i<sizeMap;i+=sizeof(int)+sizeof(char)) {
       char charofmap;
       int freq;
       readData.getChar(reinterpret_cast<char*>(&charofmap));
       readData.read(reinterpret_cast<char*>(&freq), sizeof(int));
       FreqTable.insert(charofmap,freq);
    }
//read last byte lenght
    readData.getChar(reinterpret_cast<char*>(&lengthLast));
//read code to bit
    while (!readData.atEnd()) {
        unsigned char ch;
        readData.getChar(reinterpret_cast<char*>(&ch));
        codeLetter+=unschartoQString(ch);
    }

//read size of map
    readData.read(reinterpret_cast<char*>(&sizeMap),sizeof(sizeMap));
    //read map
    for (int i=sizeof(uint16_t);i<sizeMap;i+=sizeof(int)+sizeof(char)) {
       char charofmap;
       int freq;
       readData.getChar(reinterpret_cast<char*>(&charofmap));
       readData.read(reinterpret_cast<char*>(&freq), sizeof(int));
       FreqTable.insert(charofmap,freq);
    }
//read last byte lenght
    readData.getChar(reinterpret_cast<char*>(&lengthLast));
//read code to bit
    while (!readData.atEnd()) {
        unsigned char ch;
        readData.getChar(reinterpret_cast<char*>(&ch));
        codeLetter+=unschartoQString(ch);
    }

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I can't read true for writing code.Where is my problem?

[anda_skoa]

I would suggest to test the invidual pieces.
First check that the size is written and read correctly, because there is no point in continuing if it is not.

Then check writing and reading a map with one entry, and so on.

Btw, why such a complicated way of writing the map size? If you just write the map size's value you can also more easily iterate over that range when reading, no?

Cheers,
_

[ChrisW67]

I can't read true for writing code.Where is my problem?

You have failed to explain what you are expecting to see, what you are seeing, why that is wrong, what you done to diagnose it etc.