[Scilab-users] mput ( int16([1:len]), 's', fid ) ; Creates a file of 20296 bytes ! ! !

[Stéphane Mottelet]

The problem has already been pointed out here :

http://bugzilla.scilab.org/show_bug.cgi?id=15206

S.

Le 10/01/2019 à 16:40, Stéphane Mottelet a écrit :
> Hello,
>
> With Scilab 6.0.1 under OSX or Linux, and your script
>
> len = 10000 ;
> fid = mopen(fullfile(TMPDIR,'Scilab.bin'),'wb+');
> mput (int16([1:len]), 's', fid ) ;
> mt1 = mtell(fid) ;
> mseek(0, fid) ;
> rm = mget(len, 's', fid);
> mclose(fid);
> printf('%i %i', mt1, length(rm))
>
> I got the expected answer:
>
> 20000 10000
> --> mt1
>  mt1  =
>
>    20000.
>
> However, I confirm that under Scilab 6.0.1 under Windows 7 I got the 
> same result as yours:
>
> 20296 25
> --> mt1
>  mt1  =
>
>    20296.
>
> This is somewhat related to 
> https://antispam.utc.fr/proxy/1/c3RlcGhhbmUubW90dGVsZXRAdXRjLmZy/bugzilla.scilab.org/show_bug.cgi?id=3684
>
> In order to have the correct behavior change "w+" to "wb+" in the mopen
>
> I will create a bug report on 
> https://antispam.utc.fr/proxy/1/c3RlcGhhbmUubW90dGVsZXRAdXRjLmZy/bugzilla.scilab.org
>
>
> S.
>
>
> Le 10/01/2019 à 15:35, yannick a écrit :
>> Hello,
>>
>> I try to go from MatLab to SciLab.
>>
>> I am a little disturbed by my first tests, maybe the change of 
>> context ...
>>
>> I'm probably using the instructions incorrectly, but my mistake is so 
>> huge
>> that I can not see it.
>> Can you help me open my eyes?
>>
>> The following code:
>> *
>> len = 10000 ;
>> fid = mopen( 'C:\Users\yoon\Documents\MATLAB\Dorian\SciLab.bin' , 
>> 'w+' );
>>
>>     mput ( int16([1:len]), 's', fid ) ;      mt1 = mtell(fid) ;
>>     mseek( 0 , fid  ) ;
>>     rm = mget(len, 's', fid);
>>
>> mclose(fid);
>>
>> printf('%i %i', mt1, length(rm))
>> *
>> creates a file of 20296 bytes. I expected exactly 20000...
>> mt1 == 20296.
>> Moreover "mget" reads only 25 short words.
>>
>> If I simply changes "[1:len]" for "zeros(1,len)", every thing becomes 
>> ok,
>> (file size and rm length).
>>
>> If I use double words instead short  " mput ( [1:len], 'd', fid ) ; "
>>   the file size is 80040    and rm's length 2060 !!!
>>
>>    What's missing me?
>>
>>    Thank's in advance,
>>     Yannick
>>
>>
>>
>> -- 
>> Sent from: 
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>>
>
>

-- 
Stéphane Mottelet
Ingénieur de recherche
EA 4297 Transformations Intégrées de la Matière Renouvelable
Département Génie des Procédés Industriels
Sorbonne Universités - Université de Technologie de Compiègne
CS 60319, 60203 Compiègne cedex
Tel : +33(0)344234688
http://www.utc.fr/~mottelet