Groups > comp.sys.acorn.programmer > #6105

case sensitive file test

From	Bob Latham <bob@sick-of-spam.invalid>
Subject	case sensitive file test
Newsgroups	comp.sys.acorn.programmer
Message-ID	<5876ae0c64bob@sick-of-spam.invalid> (permalink)
Organization	None
Date	2020-05-26 12:46 +0100

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Can someone tell me what is the best (speed wise) method of testing
for a specific file but importantly the name in lower case.

I have a recursive program running which scans my music library. I
want it to specifically test each album for the existence of a file
'folder/jpg' but to fail anything with a different case like 
'Folder/jpg'.

OS_File 17 does not appear to be case sensitive.

The only way I can see is to read the contents of the directory using
OS_GBPB 9 and wildcards and then test the characters for lower case.

I'm thinking that may be a lttle slow when doing thousands and i'm
also struggling to make it work anyway. on a short test run it fails
7 out of 10 albums and all albums had folder.jpg in them.

I've been stumped for some time as to why it fails. I ask for 1 file
at a time R3=1 and I keep going until R4=-1 . I've tried pointing R6
at all sorts, all treminated with zero byte.

folder/jpg<0>
*older/jpg<0>
*/jpg<0>

No matter which 7 failures out of ten.

I'm thinking daft things now. This search follows another looking for
another wild carded file actually */flac which works every time. If
you find what you want with OS_GBPB 9 you don't need to keep going to
R4=-1 do you? You can jump out of the loop if you find what you need
can't you? Getting desperate to understand the problem.

 Thanks

Bob.

-- 
Bob Latham
Stourbridge, West Midlands

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Thread

case sensitive file test Bob Latham <bob@sick-of-spam.invalid> - 2020-05-26 12:46 +0100
  Re: case sensitive file test Bob Latham <bob@sick-of-spam.invalid> - 2020-05-26 14:21 +0100
    Re: case sensitive file test Kevin Wells <kev@kevsoft.co.uk> - 2020-05-26 15:34 +0100
      Re: case sensitive file test Steve Fryatt <news@stevefryatt.org.uk> - 2020-05-26 17:12 +0100
        Re: case sensitive file test Bob Latham <bob@sick-of-spam.invalid> - 2020-05-26 17:42 +0100
          Re: case sensitive file test Steve Fryatt <news@stevefryatt.org.uk> - 2020-05-26 18:21 +0100
            Re: case sensitive file test Bob Latham <bob@sick-of-spam.invalid> - 2020-05-26 19:46 +0100
        Re: case sensitive file test Steve Drain <steve@kappa.me.uk> - 2020-05-27 13:14 +0100
          Re: case sensitive file test jgh@mdfs.net - 2020-05-27 16:25 -0700
            Re: case sensitive file test Steve Drain <steve@kappa.me.uk> - 2020-05-28 14:16 +0100
              Re: case sensitive file test druck <news@druck.org.uk> - 2020-06-01 20:01 +0100
      Re: case sensitive file test Bob Latham <bob@sick-of-spam.invalid> - 2020-05-26 17:29 +0100
        Re: case sensitive file test Steve Fryatt <news@stevefryatt.org.uk> - 2020-05-26 17:52 +0100
          Re: case sensitive file test Bob Latham <bob@sick-of-spam.invalid> - 2020-05-26 18:06 +0100
        Re: case sensitive file test "John Williams (News)" <UCEbin@tiscali.co.uk> - 2020-05-26 18:00 +0100
          Re: case sensitive file test "John Williams (News)" <UCEbin@tiscali.co.uk> - 2020-05-26 18:07 +0100
          Re: case sensitive file test Bob Latham <bob@sick-of-spam.invalid> - 2020-05-26 19:40 +0100
    Re: case sensitive file test David Higton <dave@davehigton.me.uk> - 2020-05-26 18:08 +0100
      Re: case sensitive file test Bob Latham <bob@sick-of-spam.invalid> - 2020-05-26 19:40 +0100
  Re: case sensitive file test Erik G <noreply123@xs4all.nl> - 2020-06-01 03:19 +0200
    Re: case sensitive file test Bob Latham <bob@sick-of-spam.invalid> - 2020-06-01 15:53 +0100
    Re: case sensitive file test druck <news@druck.org.uk> - 2020-06-01 20:57 +0100
    Re: case sensitive file test jgh@mdfs.net - 2020-06-04 09:23 -0700
      Re: case sensitive file test Martin <News03@avisoft.f9.co.uk> - 2020-06-04 17:51 +0100
      Re: case sensitive file test druck <news@druck.org.uk> - 2020-06-04 20:49 +0100
        Re: case sensitive file test jgh@mdfs.net - 2020-06-04 16:18 -0700
          Re: case sensitive file test druck <news@druck.org.uk> - 2020-06-05 11:27 +0100

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