638a603c   
   XPost: comp.lang.c++   
   From: alexander.bartolich@gmx.at   
      
   fryme wrote:   
   > [...]   
   > For that purpose i'm using std::ios::binary. Here is some code,   
   > describes that process (it is sketch, not last variant):   
      
   You expect us to find bugs in a "sketch"?   
      
   > [...]   
   > std::fstream m_out(output_file_path, std::ios::out |   
   > std::ios::binary);   
   > std::ifstream input_image(m_image_file_path.toUtf8().data());   
                                                 ^^^^^^^^^^^^^^^   
   All right, you are using Qt.   
      
   > input_image.seekg(0, std::ios::end);   
   > image_length = input_image.tellg();   
   > input_image.seekg(0, std::ios::beg);   
   >   
   > // writing image length to output file   
   > m_out.write( (const char *)&image_length, sizeof(long long) );   
   >   
   > char *buffer = new char[image_length];   
   > input.read(buffer, image_length);   
     ^^^^^   
   I guess you mean "input_image", not "input".   
      
   > [...]   
   > std::fstream m_in(m_file_path.toUtf8().data(), std::ios::in );   
      
   There is no "std::ios::binary" here. Is this just a detail missing   
   from the "sketch"?   
      
   > m_in.seekg(0, std::ios::beg);   
   > m_in.read((char *)&image_length, sizeof(long long));   
   > m_in.seekg(sizeof(long long));   
      
   As far as I know, the second argument of "seekg" has no default value.   
      
   > [...]   
   > std::fstream fs("E:\\Temp\\out.jpg");   
      
   Again no "std::ios::binary" here.   
      
   Please, create working example code.   
      
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