p() bug

[joachim-3]

hi developers -

today working with a student i found a strange bug with p().
as far as i see, the use of p() with a k-value (which should be possible
according to the manual) messes the scorelines (!). if there are two
score lines, the first line is skipped and the second line is repeated.
if there are three lines, the first line is skipped and the third is
repeated twice:

<CsoundSynthesizer>
<CsInstruments>
instr 1
kpf init 4
kbla = p(kpf)
printk2 kbla
endin
</CsInstruments>
<CsScore>
i 1 0 1 1
i 1 1 1 2
i 1 2 1 3
</CsScore>
</CsoundSynthesizer>

prints 2, 3, 3 instead of 1, 2, 3.

there is a sounding examples attached as p_bug2. thanks for having a look -

        joachim


ps the result is the same with the old and the new parser.

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[Tito Latini]

p(kfixed)

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[joachim-3]

thanks, tito, as always. works now perfectly.
just out of curiosity, what has been the problem?
best -
        joachim


Am 25.01.2012 09:43, schrieb Tito Latini:

> p(kfixed)
>
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[Tito Latini]

> just out of curiosity, what has been the problem?

pfun read the value of the pfield in csound->currevent->p[n].
The first k-cycle is good (in fact p() works with ivars)
but from the second, csound->currevent changes (sensevent Engine/musmon.c:878).
I fixed it saving the state of the pfields during the init pass.

tito

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