Question

fopen ("file", "wb") still writes cf-lf text files in VS2005

Asked by: wschaik

Using Visual Studio 2005 in pure C (no C++) I have problems with writing a binary file using fopen() and fputc(). Here is my little test program:

int main (int argc, char* argv[])
{
      FILE *fp;
      fp = fopen ("crlf.tmp", "wb");
      fwrite ("abc\n", 1, 4, fp);
      fputc ('x', fp);
      fputc ('y', fp);
      fputc ('z', fp);
      fputc ('\n', fp);
      fclose (fp);
      return 0;
}

When you look at the resulting file in a hex editor, in both cases the linefeeds are translated into a CR-LF pair. Which would be OK if the file was opened as default or as a text-file but not when it is opened in binary mode.

This has for me been an ongoing problem. Last time I circumvented it by replacing my C-style file I/O with MS specific calls like CreateFile() and  ReadFile(). But this time I prefer to solve the problem "once and for all". :) Also I need this code to be platform independent and this problem doesn't occur on my Unix systems.


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Asked On
2007-08-07 at 19:41:04ID: 22748352
Tags

fopen

Topics

Microsoft Visual C++.Net

,

C Programming Language

,

Visual Studio

Participating Experts
5
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Comments
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