From:	"Thorsten Erdmann" <thorsten DOT erdmann AT gmx DOT de>
Newsgroups:	comp.os.msdos.djgpp
Subject:	selfmade FindFirst/FindNext
Date:	Sun, 18 Jun 2000 17:14:07 +0200
Organization:	AddCom AG
Lines:	22
Message-ID:	<8iip1b$rnq$1@riker.addcom.de>
NNTP-Posting-Host:	h-62.96.141.70.host.de.colt.net
X-Trace:	riker.addcom.de 961341291 28410 62.96.141.70 (18 Jun 2000 15:14:51 GMT)
X-Complaints-To:	news AT news DOT addcom DOT de
NNTP-Posting-Date:	18 Jun 2000 15:14:51 GMT
X-Priority:	3
X-MSMail-Priority:	Normal
X-Newsreader:	Microsoft Outlook Express 5.00.2014.211
X-MimeOLE:	Produced By Microsoft MimeOLE V5.00.2014.211
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Hi,

I am writing a little Joliet CDROM library. Therefore I want to write a DOS
compatible findfirst/findnext routine for directory scanning. The ffblk
structure holds only five bytes for the state of the search. That is not
enough for me. Where shall I hold the search pattern? I also need storage
for an long LBN (logical block number) and a search index (short). For speed
it would also be good to have a sector buffer.

The problem is that I don't know when the search is over. I can allocate
some memory during the findfirst routine and put a pointer to it into the
five reserved bytes of ffblk. But when should I free that allocated memory?
When there is no search result? That would be bad if a program only searches
for the first match of the search pattern.

Any ideas? How does the DOS function do that?

bye
Thorsten

- Raw text -