The following program does not work because there is no exist() defined. How would I go about defining such a function or can this be included in std.file? Thanks for your assistance.

Andrew

==================

import std.stream;

void main ()
{
  char[] dirname = "pubs";
  char[] filename = "monitor.bat";

  chdir("c:\\");
  if(exist(dirname) && exist(dirname~"\\"~filename)) //can we have this in
file.d?
  {
    stdout.writeString("The pubs directory exists and ");
    stdout.writeLine("monitor.dat exists in the pubs directory.");
  }
  else
  {
    mkdir(dirname);
    chdir(dirname);
    write(filename, "ViewSonic GS790");
  }
}

With the current functions in std, I think it is easiest to implement exist by trying to read the file and catch the exception.

bool exist(char [] file)
{
  bool result = true;
  try {
    read(file);
  }
  catch (FileException e) {
    result = false;
  }
  return result;
}

Lars Ivar Igesund

"Andrew Edwards" <edwardsac@spamfreeusa.com> wrote in message news:bri5v9$2l06$1@digitaldaemon.com...
> The following program does not work because there is no exist() defined.
How
> would I go about defining such a function or can this be included in std.file? Thanks for your assistance.
>
> Andrew
>
> ==================
>
> import std.stream;
>
> void main ()
> {
>   char[] dirname = "pubs";
>   char[] filename = "monitor.bat";
>
>   chdir("c:\\");
>   if(exist(dirname) && exist(dirname~"\\"~filename)) //can we have this in
> file.d?
>   {
>     stdout.writeString("The pubs directory exists and ");
>     stdout.writeLine("monitor.dat exists in the pubs directory.");
>   }
>   else
>   {
>     mkdir(dirname);
>     chdir(dirname);
>     write(filename, "ViewSonic GS790");
>   }
> }
>
>

Don't mean to sound snotty, but seeing MW's report on D's speed of exception handling, I think a better alternative would be to use stat on linux, and GetFileAttributes on Windows.

Pseudo code for windows, I'm actually installing a Linux box now so I'll try to work this out on Linux as well:

alias std.toStrinz c_str;
bit fileExists(char [] name ) { return (GetFileAttributes( c_str(name) ) !=
0xFFFFFFFF); }

This actually compiles and works as expected ( it also works for
directories )

C



"Lars Ivar Igesund" <larsivar@igesund.net> wrote in message news:bri9o6$2qj7$1@digitaldaemon.com...
> With the current functions in std, I think it is easiest to implement exist by trying to read the file and catch the exception.
>
> bool exist(char [] file)
> {
>   bool result = true;
>   try {
>     read(file);
>   }
>   catch (FileException e) {
>     result = false;
>   }
>   return result;
> }
>
> Lars Ivar Igesund
>
> "Andrew Edwards" <edwardsac@spamfreeusa.com> wrote in message news:bri5v9$2l06$1@digitaldaemon.com...
> > The following program does not work because there is no exist() defined.
> How
> > would I go about defining such a function or can this be included in std.file? Thanks for your assistance.
> >
> > Andrew
> >
> > ==================
> >
> > import std.stream;
> >
> > void main ()
> > {
> >   char[] dirname = "pubs";
> >   char[] filename = "monitor.bat";
> >
> >   chdir("c:\\");
> >   if(exist(dirname) && exist(dirname~"\\"~filename)) //can we have this
in
> > file.d?
> >   {
> >     stdout.writeString("The pubs directory exists and ");
> >     stdout.writeLine("monitor.dat exists in the pubs directory.");
> >   }
> >   else
> >   {
> >     mkdir(dirname);
> >     chdir(dirname);
> >     write(filename, "ViewSonic GS790");
> >   }
> > }
> >
> >
>
>

First of all, thanks to both of you for your suggestions.

"Charles" wrote ...
> Don't mean to sound snotty, but seeing MW's report on D's speed of
exception
> handling, I think a better alternative would be to use stat on linux, and GetFileAttributes on Windows.
>

Where is GetFileAttributes defined? I assume it's defined in Kernel32.dll but am unable to compile the program as the compiler keeps barking about undefined identifier GetFileAttributes.

> Where is GetFileAttributes defined? I assume it's defined in Kernel32.dll but am unable to compile the program as the compiler keeps barking about undefined identifier GetFileAttributes.

Never mind. I've located it in std.c.windows.windows. Thanks a million.

Andrew

No problemo,

also YT's win32 wrappers are great, i havent ever use phobos windows. http://hp.vector.co.jp/authors/VA028375/contents/D_windows.h.html

C !

"Andrew Edwards" <edwardsac@spamfreeusa.com> wrote in message news:brii04$4m4$1@digitaldaemon.com...
> > Where is GetFileAttributes defined? I assume it's defined in
Kernel32.dll
> > but am unable to compile the program as the compiler keeps barking about undefined identifier GetFileAttributes.
>
> Never mind. I've located it in std.c.windows.windows. Thanks a million.
>
> Andrew
>
>

AFAIK this is the fastest way to check if a file exists on Windows.  Good call Charles!

Sean

"Charles" <sanders-consulting@comcast.net> wrote in message news:brichi$2ug8$1@digitaldaemon.com...
> Don't mean to sound snotty, but seeing MW's report on D's speed of
exception
> handling, I think a better alternative would be to use stat on linux, and GetFileAttributes on Windows.
>
> Pseudo code for windows, I'm actually installing a Linux box now so I'll
try
> to work this out on Linux as well:
>
> alias std.toStrinz c_str;
> bit fileExists(char [] name ) { return (GetFileAttributes( c_str(name) )
!=
> 0xFFFFFFFF); }
>
> This actually compiles and works as expected ( it also works for
> directories )
>
> C