OpenEuphoria

Re: convert numbers

• Posted by irvm at ellijay.com Oct 12, 2003
• 491 views

On Sunday 12 October 2003 04:37 am, Louis wrote:

> The value() function does not simply return a number.  It returns two
> things:  a success/failure message and the number.  Not as easy to use in a
> calculation as above.  Although value() is more rigorous than s2n(), I
> suspect s2n() is much faster.

Indeed, your function is 5 to 8 x faster than value().
Which makes me think that I should take a look at some of my 
programs which use value() heavily - maybe I could speed them up 
significantly by writing my own conversion routines.

Irv

> -----------------------------------------------------------------
> -- s2n -- Convert a numeric text string to an integer
> --   Note: This only works for positive integers
> -----------------------------------------------------------------
> global function s2n(sequence s)
>     atom n
>     s -= '0' -- Convert ASCII to BCD
>     n = s[1] -- First digit
>     for i = 2 to length(s) do
>         n = n*10 + s[i] -- The rest of the digits
>     end for
>     return n -- Return the number
> end function