Re: [Firebird-devel] isc_expand_dpb()

[Andy C. <an...@ad...>]

It looks like the consensus is this:

[1] We continue to document the format of the DPB.

[2] We publish the restriction that we can only handle file names up to =
254 characters in length ( the length byte is 0..255 but includes the =
trailing NUL byte )

[3] We remove isc_expand_dpb() from the published API, or depreciate it =
as a "DO NOT USE" warning. I don't see any reason to mention it at all.

> > I am a little concerned that the length of a string in the dbp =
buffer is
> limited
> > to 255 characters by the use of one byte as a length byte; file =
names
> under
> > Windows 98 can be as long as 32K bytes.
> If correct, this is indeed a problem waiting to crash and should be =
logged.
> /Mike

I was somewhat in error. In Windows 98 the length of a file name is =
limited to MAX_PATH characters, which is 260. In Windows NT/2000, using =
Unicode, by prepending \\?\ to the name, the name can get to 32,000 =
characters. Thus, not a panic, but down the road.

Obviously these extremely long file names are not for users to type. =
They will be generated. I have already seen a URL of more than 250 =
characters.