🚀 go-pugleaf

In article <10068@brazos.Rice.edu> preston@titan.rice.edu (Preston Briggs) writes:
>One reasonable way to proceed is to *not* convert the numbers.
>Instead, keep the string representation and pass it along from phase
>to phase.  This has the advantages of never losing precision,
>saving FP arithmetic, making your intermediate code simpler
>Preston Briggs				looking for the great leap forward


I have just written a program 'ToInteger' that takes a file of numbers
of the form [+|-][digit][.][digit][e|E][integer]
and makes them simpler.

1.00E+002  	--> 100
9e2    		--> 900		(padding with 0)
005		-->   5  	(implied decimal point alignment)
10.001e4	--> 100.01e3	(exact digit preservation)
0010.0010e4	--> 100.01e3	(leading/trailing 0 suppression)
0		-->  00		(known bug.)
00		-->  00		(not perverse, however)
I have a structure similar to:
  RECORD
  negative : BOOLEAN;
  decimalBeforeDigit : CARDINAL;
  exponent : INTEGER;
  mantissa : string; (*string is currently ARRAY [0..max-1] OF CHAR*)
  END; 

(is it possible to use VI to write Modula-2? :-) )
 As soon as I finish a little problem using InOut (Logitech 3.3t) and
redirected input, I'll post it.  Help is welcome...

-------------------------------

I'd like to have RealInOut print the numbers in engineering format,
(powers of 1000 for exponent. No, wait, that's multiples of 3...)
The smaller exponents,  -21 .. 21, would be replaced with single
letters rather than E+nnn.

e.g.:
 1E-009	--> 1n
 1E-006	--> 1u
 1E-003	--> 1m
 1E+000	--> 1

Has anyone else done this?  Would people want the diffs?
What's smaller than femto and ato?
Are there suggestions for large exponents, e-99.



-- 
Aubrey McIntosh  	"Find hungry samurai." -- The Old Man        
1502 Devon Circle       comp.os.minix, comp.lang.modula2         
Austin, TX 78723 
1-(512)-452-1540  (v)