From bug-octave-request at bevo dot che dot wisc dot edu Fri Jul 18 13:22:30 2003
Subject: FWRITE writes extra bytes (OfW 2.1.42)
From: =?ISO-8859-1?Q?Alois_Schl=F6gl?= <alois dot schloegl at tugraz dot at>
To: bug-octave at bevo dot che dot wisc dot edu
Date: Fri, 18 Jul 2003 09:12:37 -0500

To: bug-octave at bevo dot che dot wisc dot edu
Cc: schloegl
Subject: bug in fwrite (OfW 2.1.42)
--------
Bug report for Octave 2.1.42 configured for i686-pc-cygwin
(I used a version from octave-forge)


Description:
-----------

   FWRITE writes extra bytes


Repeat-By:
---------

####### The following script shows the problem.

x=(1:1e3)'*ones(1,5); % test data
fid = fopen('test.tmp','w+');
count=0;
for k = 1:10,
        c=fwrite(fid,x(k*100+(-99:0),:),'int16');;
        count=count+c;
        tmp(k,:)=[2*count,ftell(fid)];
end;
fclose(fid);
tmp,

######## The result is
 
tmp =

     1000     1000
     2000     2005
     3000     3005
     4000     4010
     5000     5010
     6000     6011
     7000     7015
     8000     8016
     9000     9020
    10000    10020


##### Both columns should be the same, but the second column shows extra 
bytes were written.



Fix:
---

Not known, but it seems as if 0x0A is extended to 0x0D 0x0A, which 
causes extra bytes.










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