How to read bit by bit in a file

This is a discussion on How to read bit by bit in a file within the C++ Programming forums, part of the General Programming Boards category; My question is that assume that you have a file with hundred's of 0's or 1's (binary) example: 10010101010101101 10101010101010111 ...

  1. #1
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    How to read bit by bit in a file

    My question is that


    assume that you have a file with hundred's of 0's or 1's (binary)
    example:
    10010101010101101
    10101010101010111
    .......


    Now I want to read one bit at a time from that file. Is that possible?
    If there was a space " " in between each bits then Yes I could do it by
    Code:
        
    long long int dataDECODER[512];
    int j = 0;
    ifstream inBINARY;    
    inBINARY.open("outBinaryFile.txt");
    while(!inBINARY.eof())
        {
           inBINARY >> dataFILE[j];
               j++;        
        }



    I cannot grab the whole data into an array (if there were to be no spaces in between) or a variable because the value in the file is too large.

    What I am trying to do is reading each bit and use "Tree Branch" method for the Huffman.


    So is there a way to do this?

  2. #2
    C++ Witch laserlight's Avatar
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    It sounds like rather than read bit by bit, you want to read character by character, and interpret each character as a bit.

    Incidentally, boost::dynamic_bitset might come in handy here.
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    I am looking at the examples of boost::dynamic_bitset. So far I am seeing that it sets or clear the bits.
    How is that reading the data in the file.

    I think you are right about reading char by char instead of bit by bit, but
    how would you read each char individually?

  4. #4
    C++ Witch laserlight's Avatar
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    Quote Originally Posted by geewhan
    I am looking at the examples of boost::dynamic_bitset. So far I am seeing that it sets or clear the bits.
    How is that reading the data in the file.
    Refer to the overloaded operator>> for input streams.
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