| From: | Alexander Niven-Jenkins |
| Date: | 10 Aug 2001 at 19:19:57 |
| Subject: | [amiga-c] Re: ExamineFH |
Hiya Twelvebullets,
On 10-Aug-01, Twelvebullets wrote:
> When I get to ExamineFH, it fails ! Why ??
Firstly you need to allocate the memory for "fibb" as you have just
declared a pointer; secondly most of the OS dos routines need aligned data
so you need to allocate it with something like AllocVec(). See a quick
example below.
// returns the size of a file, -1 on error
long FileSize(char *filename)
{
long filesize = -1, handle = NULL;
struct FileInfoBlock *fib = NULL;
if(handle = Open(filename, MODE_OLDFILE))
{
fib = (struct FileInfoBlock*)AllocVec(sizeof(struct FileInfoBlock),
MEMF_PUBLIC);
if(fib)
{
ExamineFH(handle, fib);
filesize = fib->fib_Size;
FreeVec(fib);
}
Close(handle);
handle = NULL;
}
return filesize;
}
Kind regards...
Alex
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