--- Cheok Yan Cheng wrote:
>
> Before I open a file, I try to check whether the file
> exsit in my system
> ---
> fileHandle = FileOpen(0, "game0", CreatorId,
> CreatorId, fileModeReadOnly, NULL);
>
> if(FileError(fileHandle) == 0)
> {
> // file exsit !
> }
> ---
1. You didn't check to make sure fileHandle isn't 0 before you passed
it to FileError().
2. "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."
-- But you didn't pass in anything for the errP parameter so you can't
check it!
3. You passed in the creator id for 2 params. Was that what you wanted
to do? The prototype for FileOpen() is:
FileHand FileOpen (UInt16 cardNo, const Char *nameP, UInt32 type,
UInt32 creator, UInt32 openMode, Err *errP)
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