RE: [Dev-C++] Portable End-of-Line

When a file/stream is opened in text mode, the eol sequence is always \n
and then the underlying subsystem will perform the mapping to/from the
native format.

Notethat the underlying subsystem assumes that any read files are in the
native format, and might be confused if the file isn't. Most (all?)
dos/win libraries supports reading of both unix and dos/win files, but a
number of them gets confused for Mac files.

When reading in binary mode:
DOS/Win:	\r\n
Unix:		\n
Mac:		\r
Unicode:	U+2028

/Per W

On Mon, 30 Jun 2003, Ioannis Vranos wrote:

> > -----Original Message-----
> > From: dev...@li...
> > [mailto:dev...@li...] On Behalf
> > Of David McKen
> > Sent: Monday, June 30, 2003 2:31 AM
> > To: Dev-Cpp Mailing List
> > Subject: [Dev-C++] Portable End-of-Line
> >
> >
> > Is there a portable way of finding out the end-of line
> > sequence for the
> > current operating system? I hope to make my program
> > portable to both Win +
> > *NIX and would like something more (what word could go
> > here?) than:
> >
> > #ifdef WIN32
> >   const char DIR_SEP = '\\';
> >   const char eoln[]  = "\n";
> > #else
> >   const char DIR_SEP = '/';
> >   const char eoln[]  = "\n\r";
>
>
> "\n\r" also applies at least to .NET text boxes.
>
>
> In any case only '\n' is portable.
>
>
> > #endif
> >
> > Same applies to the directory separator. Is there a way I
> > can detect which
> > one is used? As I said portability is of utmost importance
> > so it must be C++
> > ANSI compliant (my program uses classes so it cant be a C
> > compliant program.
>
>
> >From my limited experience those "\n\r" etc sequences apply only to GUI
> programs.
>
> Any way, about line change since '\n' exists in all cases you can detect it
> by reading character by character. If you want to display it consider it as
> a system extension and you can handle it as all system extensions by
> encapsulating it to a small portion of your program:
>
>
> Example:
>
> // Unportable encapsulations
> namespace uenc
> {
>  const string eol="\n";
>
>  inline void clearscr()
>  {
>    system("cls");
>   }
>
>  // ...
> }
>
>
> So when you want to compile the program in another platform you have only to
> change those encapsulations.
>
>
> And try to forget the ancient C style stuff where C++ provides superior
> alternatives.
>
>
>
>
> Ioannis Vranos
>
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>
>
>
>
>
>
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