--- Keith Rollin wrote:
> The documentation is pretty clear on this. Under FileRead, it says
> "if successful, returns a handle to an open file stream; otherwise,
> returns 0".
>
> So your code should be:
>
> fileHandle = FileOpen (...);
> if (fileHandle)
> {
> // file exsit !
> }
>
> -- Keith
>
I am shocked and amazed to find that I am now in the position to add
something to what Keith said. To wit:
(From the Reference)
"In some cases, on some platforms, FileOpen returns a non-zero value
when it has failed to open a file; thus, it is always a good idea to
check the errP parameter value to determine if an error has occurred."
Therefore, shouldn't one use
Err err;
fileHandle = FileOpen (..., &err);
if (fileHandle && (err == errNone) )
{
// file exists !
}
However, I don't think this tests whether or not a file exists. If it
doesn't already exist, the above code creates it.
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