Question

I’m trying to write a Huffman encoder but I’m getting some compression errors. I identified the problem as mismatches between characters that were put() to the ofstream and the characters read() from the same file.

One specific instance of this problem :

• The put() writes ASCII character 10 (Line feed)
• The read() reads ASCII character 13 (Carriage return)

I thought read and put read and write raw data ( no character translations ) I’m not sure why this is happening. Can someone help me out?

Here is the ofstream instance for writing the compressed file:

std::ofstream compressedFileStream(getCompressedFileName(),std::ios::binary||std::ios::ate);

and the ifstream instance for reading the same

    std::ifstream fileInput(getFileName()+".huf",std::ios::binary);

The code is running on Windows 7 and all streams in the program are opened in binary mode.

Answer 1

Not opening in binary mode due to a typo:

std::ofstream compressedFileStream(getCompressedFileName(),std::ios::binary||std::ios::ate)

should be:

std::ofstream compressedFileStream(getCompressedFileName(),std::ios::binary|std::ios::ate)
                                                                      //   ^

|, not ||.