# value conversion utility

Rob Cozens rcozens at pon.net
Mon Jun 3 09:38:01 EDT 2002

```>Has anyone written a value conversion (Hex, bit, signed, unsigned,
>etc. )utility in Revolution?

Hi Kurt,

I have not, and decided not to put conversion routines in my library
because I've never used the conversion extensions I wrote in
CompileIt!

FWIW, here is CompileIt! source to convert positive base 10 integers
to any base from 2 to 35 and vice versa:

function decimalToX theNumber, numberBase
-- Returns a numberString that uses base numberBase notation to
reresent integer theNumber
put theNumber + 0.0 into realNumber -- CompileIt types theNumber as
string...convert to real
put theNumber + 0 into myNumber -- CompileIt types theNumber as
string...convert to integer
if realNumber - myNumber is not 0 or myNumber < 0 then return
"Number not a positive integer"
put numberBase + 0 into myBase -- CompileIt types numberBase as
string...convert to integer
if myBase < 2 or myBase > 35 then return "Invalid number base"
put myBase into checkSum
put 0 into x
repeat until checkSum > myNumber
put myBase * checkSum into checkSum
end repeat
put empty into numberString
repeat until x = 0
get myBase^x
put myNumber div it into theDigit
put myNumber mod it into myNumber
if theDigit > -1 and theDigit < 10 then put  numToChar(theDigit +
48) after numberString
else put numToChar(theDigit + 55) after numberString
subtract 1 from x
end repeat
if myNumber < 10 then put  numToChar(myNumber + 48) after numberString
else put numToChar(myNumber + 55) after numberString
return numberString
end decimalToX

function xToDecimal numberString, numberBase  -- could benefit by using handles
-- Returns the decimal equivalent of a numberString that uses base
numberBase notation
put numberBase + 0 into myBase -- CompileIt types numberBase as
string...convert to integer
if myBase < 2 or myBase > 35 then return "Invalid number base"
put 0 into theNumber
put myBase + 55 into tooMany
repeat with x =  1 to length(numberString)
put myBase into theDigit
get charToNum(char x of numberString)
if it > 47 and it < 58 then put  it - 48 into theDigit   -- "0" to "9"
else if it > 64 and it < tooMany then put it - 55 into theDigit
-- "A" to upper digit
if theDigit >= myBase then return "Invalid Digit"
put theNumber*myBase+theDigit into theNumber
end repeat
return theNumber
end xToDecimal
--

Rob Cozens
CCW, Serendipity Software Company
http://www.oenolog.com/who.htm

"And I, which was two fooles, do so grow three;
Who are a little wise, the best fooles bee."

from "The Triple Foole" by John Donne (1572-1631)
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