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Add primitives for printing floating point values.

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This commit is contained in:
Jared Hance 2014-06-03 13:09:40 -04:00
parent 4530b15d94
commit 0ed3dc73a7
1 changed files with 15 additions and 0 deletions
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15
arvo/hoon.hoon
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@ -1198,6 +1198,16 @@
=+ e=(dif:si (sun:si (xeb h)) (sun:si 1))
=+ a=(lia p (mix (lsh 0 p h) b))
[s=s e=e a=a]
:: convert from sign/exp/ari -> sign/whole/frac w/ precision q
++ cog |= [q=@u s=? e=@s a=@u] ^- [s=? h=@u f=@u]
::?: =(e -0)
:: [s=s h=1 f=(fre q a)
::?: =((mod `@u`s 2) 0) :: pos
:: (coh q s e a)
::?: =((mod `@u`s 2)
::=+ (^mul ari (bex e))
!!
:: Denominator of fraction, f is base 10
++ den |= f=@u ^- @u
@ -1207,6 +1217,11 @@
++ fra |= [p=@u f=@u] ^- @u
=+ d=(den f)
(^div (lsh 0 p f) d)
:: Decimal fraction of precision q [for printing only]
++ fre |= [q=@u a=@u] ^- @u
=+ d=(bex (^sub (met 0 a) 1))
(^div (^mul a (bey 10 q 0 1)) d)
:: Decimal length of number, for use in ++den
++ dcl |= [f=@u] ^- @u