From bug-octave-request at bevo dot che dot wisc dot edu  Thu May 31 14:31:29 2001
Subject: saving string matrices
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Stef Pillaert <stef dot pillaert at kahosl dot be>
Cc: bug-octave at bevo dot che dot wisc dot edu
Date: Thu, 31 May 2001 14:31:07 -0500

On 29-May-2001, Stef Pillaert <stef dot pillaert at kahosl dot be> wrote:

| To: bug-octave at bevo dot che dot wisc dot edu
| Cc: stef
| Subject: saving string matrices
| --------
| Bug report for Octave 2.1.34 configured for i586-pc-linux-gnu
| 
| Description:
| -----------
| 
| When creating a string matrix, the way this matrix gets saved differs
| depending on the way how it is created. I use the save-load-patch to save
| structs in octave (provided by jcardoso, If I remember correctly...).
| 
| Repeat-By:
| ---------
| I create both a & b, with the same result, but the saved file seems to make a
| difference between them. However, in this case, it loads them both OK, but I
| do have cases where reloading the file gives very strange results.
| 
| Stef.
| 
| octave:1> a=["abcd";setstr(97*ones(1,200))];
| octave:2> b(1,1:4)="abcd";
| octave:3> b(2,1:200)=setstr(97*ones(1,200));
| octave:4> save savetest.test a b
| octave:5> exit
| [stef at toneti testing2]$ less savetest.test
| # Created by Octave 2.1.34, Tue May 29 14:55:56 2001 CEST
| <stef at toneti dot thuis dot be>
| # name: a
| # type: string array
| # elements: 2
| # length: 200
| abcd
|  
| # length: 200
| aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
| # name: b
| # type: string array
| # elements: 2
| # length: 200
| abcd^ at wn^@^@^@^@^@^@^@^@^@^M^@^@^@^P^@^@^@^A^@^@^@^@^@^@^@savetest dot test^@^@^@¨Ñ^^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ÈÑ^^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@èÑ^^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@
| # length: 200
| aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
| savetest.test (END)

There are two problems here.  One is that 

| octave:1> a=["abcd";setstr(97*ones(1,200))];

fills with the value of string_fill_char, but

| octave:2> b(1,1:4)="abcd";
| octave:3> b(2,1:200)=setstr(97*ones(1,200));

does not (it fills with ASCII nul).

The other problem is that the save function writes garbage after the
first ASCII nul character.

Both should be fixed in CVS now.

Thanks,

jwe



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