Hi all -

I want to write a string to a file with fprints, and this string  
contains a format string, for instance:

fprints "/Users/jh/Desktop/fprints.txt", {{Soutnam sprintf "%s_ 
%d.wav", Sfile, ichn}}

This results in a bus error, because of the "%s" and "%d". I tried  
masking it with "\%d" or "%%d", but this does not work.
Can Csound write to a file, so that the file has the line
Soutnam sprintf "%s_%d.wav", Sfile, ichn
?

Thanks for any help -

	joachim


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From what I gather, there are two problems with fprints. First, it
can't print "%" by itself. For example:

    fprints "./string_fprint.txt", "%"

The other problem is that it doesn't seem to support strings:

    fprints "./string_fprint.txt", "%s", "Foo"

However, %d doesn't seem to be causing any problems:

    fprints "./string_fprint.txt", "%d", 7897  ; this works

Best,
Jake
-- 
The Csound Blog - http://csound.noisepages.com/



On Sun, Mar 21, 2010 at 10:41 AM, joachim heintz  wrote:
> Hi all -
>
> I want to write a string to a file with fprints, and this string contains a
> format string, for instance:
>
> fprints "/Users/jh/Desktop/fprints.txt", {{Soutnam sprintf "%s_%d.wav",
> Sfile, ichn}}
>
> This results in a bus error, because of the "%s" and "%d". I tried masking
> it with "\%d" or "%%d", but this does not work.
> Can Csound write to a file, so that the file has the line
> Soutnam sprintf "%s_%d.wav", Sfile, ichn
> ?
>
> Thanks for any help -
>
>        joachim
>
>
> Send bugs reports to the Sourceforge bug tracker
>           https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe
> csound"
>
>


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Yes, fprints (like prints) doesn't support the %s modifier. But you  
can do this in that way:
Sfoo sprintf "%s", "foo"
fprints "./string_fprint.txt", Sfoo

Or even in this way:
Sfoo1 sprintf "%s", {{"foo"}}
fprints "./string_fprint.txt", Sfoo1

But my case is different. I don't want to resolve a format string  
before writing to file with fprints (like in your example), but I do  
want to write the format string itself to a file (because I want to  
execute the file later, and then resolving the format string with  
different arguments).

So in fact I need to write "%" itself, but Csound doesn't let me do  
so :(

Perhaps with the Python opcodes? I don't know them good enough.

	joachim



Am 21.03.2010 um 19:31 schrieb Jacob Joaquin:

> From what I gather, there are two problems with fprints. First, it
> can't print "%" by itself. For example:
>
>    fprints "./string_fprint.txt", "%"
>
> The other problem is that it doesn't seem to support strings:
>
>    fprints "./string_fprint.txt", "%s", "Foo"
>
> However, %d doesn't seem to be causing any problems:
>
>    fprints "./string_fprint.txt", "%d", 7897  ; this works
>
> Best,
> Jake
> -- 
> The Csound Blog - http://csound.noisepages.com/
>
>
>
> On Sun, Mar 21, 2010 at 10:41 AM, joachim heintz  
>  wrote:
>> Hi all -
>>
>> I want to write a string to a file with fprints, and this string  
>> contains a
>> format string, for instance:
>>
>> fprints "/Users/jh/Desktop/fprints.txt", {{Soutnam sprintf "%s_ 
>> %d.wav",
>> Sfile, ichn}}
>>
>> This results in a bus error, because of the "%s" and "%d". I tried  
>> masking
>> it with "\%d" or "%%d", but this does not work.
>> Can Csound write to a file, so that the file has the line
>> Soutnam sprintf "%s_%d.wav", Sfile, ichn
>> ?
>>
>> Thanks for any help -
>>
>>        joachim
>>
>>
>> Send bugs reports to the Sourceforge bug tracker
>>           https://sourceforge.net/tracker/?group_id=81968&atid=564599
>> Discussions of bugs and features can be posted here
>> To unsubscribe, send email sympa@lists.bath.ac.uk with body  
>> "unsubscribe
>> csound"
>>
>>
>
>
> Send bugs reports to the Sourceforge bug tracker
>            https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body  
> "unsubscribe csound"
>
>



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Originally, I thought I'd be able to trick it with:

fprints "./string_fprint.txt", "%s", "%"

Looking at the manual, it says %c works with ascii codes. But guess
which one doesn't work?  37. And 37 == %. fprint really doesn't like
%.

There's some wonky design issues with fprints. For example, one has to
write out %! for a semi-colon, because back in 1997, the semi-colon
was interpreted has a comment. However, the problem should have been
fixed in the parser, not the opcode.

Best,
Jake
-- 
The Csound Blog - http://csound.noisepages.com/


On Sun, Mar 21, 2010 at 11:44 AM, joachim heintz  wrote:
> Yes, fprints (like prints) doesn't support the %s modifier. But you can do
> this in that way:
> Sfoo sprintf "%s", "foo"
> fprints "./string_fprint.txt", Sfoo
>
> Or even in this way:
> Sfoo1 sprintf "%s", {{"foo"}}
> fprints "./string_fprint.txt", Sfoo1
>
> But my case is different. I don't want to resolve a format string before
> writing to file with fprints (like in your example), but I do want to write
> the format string itself to a file (because I want to execute the file
> later, and then resolving the format string with different arguments).
>
> So in fact I need to write "%" itself, but Csound doesn't let me do so :(
>
> Perhaps with the Python opcodes? I don't know them good enough.
>
>        joachim


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joachim heintz wrote:

> So in fact I need to write "%" itself, but Csound doesn't let me do so :(

Usually printf-type functions will print '\%' as '%'.

Martin


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> Usually printf-type functions will print '\%' as '%'.

I've been playing with fprint for nearly an hour. I've come to the
conclusion that fprint is anything but standard-c printf() compliant.
:(

Best,
Jake

yes, but fprints does not ... did you try?


Am 21.03.2010 um 19:57 schrieb Martin Peach:

> joachim heintz wrote:
>
>> So in fact I need to write "%" itself, but Csound doesn't let me do  
>> so :(
>
> Usually printf-type functions will print '\%' as '%'.
>
> Martin
>
>
> Send bugs reports to the Sourceforge bug tracker
>           https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body  
> "unsubscribe csound"
>
>



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joachim heintz wrote:
> yes, but fprints does not ... did you try?
>

No, I just assumed it was like fprintf, but looking at the source code I 
see it's not the same at all. I should just shut up ;)

Martin


> 
> Am 21.03.2010 um 19:57 schrieb Martin Peach:
> 
>> joachim heintz wrote:
>>
>>> So in fact I need to write "%" itself, but Csound doesn't let me do 
>>> so :(
>>
>> Usually printf-type functions will print '\%' as '%'.
>>
>> Martin
>>
>>
>> Send bugs reports to the Sourceforge bug tracker
>>           https://sourceforge.net/tracker/?group_id=81968&atid=564599
>> Discussions of bugs and features can be posted here
>> To unsubscribe, send email sympa@lists.bath.ac.uk with body 
>> "unsubscribe csound"
>>
>>
> 
> 
> 
> Send bugs reports to the Sourceforge bug tracker
>            https://sourceforge.net/tracker/?group_id=81968&atid=564599
> Discussions of bugs and features can be posted here
> To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe 
> csound"
> 
> 
> 



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