Re: Behaviour if Findfirst/Findnext

Article View: borland.public.cppbuilder.nativeapi

Article #3568

Back to borland.public.cppbuilder.nativeapi Previous Next

#3568

From: Andrue Cope [TeamB]
Date: Tue, 30 May 2006 07:57

37 lines
1903 bytes

Jos� wrote:

> This probably means that the behviour of findfirst/findnext cannot be
> predicted.

Aye. There is one other difference that can trip people up. The
standard directory search algorithm is:

  Find_First

  do
  {
    if( last_found__is_Dir )
      recurse_to_search_dir
  }while( More_to_find

The problem with this is that it leads to multiple directory search
handles being open concurrently. Such handles can be quite resource
intensive and some OSes can't tolerate large numbers being left open.

As a result I feel it is better to use this algorithm:

  Find_First

  do
  {
    if( last_found__is_Dir )
      add_dir_to_list
  }while( More_to_find

  search_each_dir_in_dir_list

This way only one search is active at a time.
-- 
Andrue Cope [TeamB]
[Bicester, Uk]
http://info.borland.com/newsgroups/guide.html

Technical Details

Message-ID: <447bfaec@newsgroups.borland.com>

Path:

arc1-ca.pugleaf.net!g2news2.google.com!news3.google.com!news4.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsgroups.borland.com!not-for-mail

References:

<5v4b725541pgl6mgme0m2sc5n0ni1bm94p@4ax.com> <4475d95a$1@newsgroups.borland.com> <4476b4cf$1@newsgroups.borland.com> <eb1h725gvftrf3h95vhrn1pjfu4fjgd3gs@4ax.com>

Show Full Headers

Complete Article Headers

X-Google-Thread: 10cc67,57df08767886389
X-Google-Attributes: gid10cc67,public
X-Google-Language: ENGLISH,ASCII
From: "Andrue Cope [TeamB]" <no.spam@not.a.valid.address>
Subject: Re: Behaviour if Findfirst/Findnext
Newsgroups: borland.public.cppbuilder.nativeapi
References: <5v4b725541pgl6mgme0m2sc5n0ni1bm94p@4ax.com> <4475d95a$1@newsgroups.borland.com> <4476b4cf$1@newsgroups.borland.com> <eb1h725gvftrf3h95vhrn1pjfu4fjgd3gs@4ax.com>
Date: Tue, 30 May 2006 08:57:33 +0100
User-Agent: XanaNews/1.18.1.1
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: 8bit
NNTP-Posting-Host: 217.207.223.34
Message-ID: <447bfaec@newsgroups.borland.com>
X-Trace: newsgroups.borland.com 1148975852 217.207.223.34 (30 May 2006 00:57:32 -0700)
Lines: 37
X-Authenticated-User: acope
Path: arc1-ca.pugleaf.net!g2news2.google.com!news3.google.com!news4.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsgroups.borland.com!not-for-mail

Reply to Parent Message