Hi Alex,
> Please take a look in "src/ext.c". There is, for example, 'ext:Sin',
> that interfaces to scaled integers:
>
> =A0 : (ext:Sin 314159 100000)
> =A0 -> 0
> =A0 : (ext:Cos 314159 100000)
> =A0 -> -100000
Ah, Thanks. Could you please explain how a "double" value is encoded
in "cell"? I could not "decipher" doubleToNum() and numToDouble() in
big.c!
A tutorial on PicoLisp FFI would be great; with that, PicoLisp would
have no shortage of libraries! ;-)
> If you set '*Scl', you can make it a little more readable:
>
> =A0 : (setq *Scl 5)
> =A0 -> 5
>
> =A0 : (ext:Cos 3.14159 1.0)
> =A0 -> -100000
> =A0 : (ext:Sin 0.5 1.0)
> =A0 -> 47943
>
> =A0 : (format (ext:Cos 3.14159 1.0) *Scl)
> =A0 -> "-1.00000"
> =A0 : (format (ext:Sin 0.5 1.0) *Scl)
> =A0 -> "0.47943"
By the way, is the result of following code expected?
: *Scl
-> 0
: (let *Scl 2 1.23)
-> 1
Is this because 1.23 is "parsed" when *Scl is still 0, right? Is there
a better way than using:
: (let *Scl 2 (format "1.23" *Scl))
-> 123
More questions ;-)
1. What does 'mis>' stand for?
2. Why a "reverse" association list (instead of a normal association
list) is used for the "property list"?
: (putl 'X '((10 . a) (20 . b))) (show 'X)
X NIL
b 20
a 10
-> X
Thanks for your time answering my questions.
Best regards,
KS
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