OpenEuphoria

Re: Documentation and output of pretty_print()

• Posted by "Juergen Luethje" <j.lue at gmx.de> Sep 13, 2004
• 492 views

Pete Lomax wrote:

> On Sun, 12 Sep 2004 23:39:54 +0200, Juergen Luethje <j.lue at gmx.de>
> wrote:
>
>> Pete Lomax wrote:
>>> I've uploaded a new version.
>>> http://palacebuilders.pwp.blueyonder.co.uk/ppp.ZIP
>>
>> 1) does not work as I expected, so you targeted at *signed* 32-bit
>>   integers only?
>> 3) loses the '-' sign.
> Both should be ok now.

I'm in a hurry now, and will try it out when I'm back home from work.

I just realized that both Eu's printf() and pretty_print() also lose the
'-' sign.
And there probably is another problem. In order to be able to re-use an
output from e.g.

printf(1, "%x", {a})

I think it's actually much better to use

printf(1, "#%x", {a})

so that the printed value still can be recognized as hex number.

The problem arises with negative numbers. Currently, the '-' sign is
lost, I think that's a bug. But when the minus sign wil be included in
the output, using the suggested format, then there will be output
strings such as

#-FF

This raises the error "hex number not formed correctly". Here is a small
demo program:

include misc.e
include ppp.e

sequence fmt
atom a
a = -#80000000            -- smallest 32-bit integer

fmt = "%x\n"
printf(1, fmt, {a})
pretty_print(1, a, {0,3,1,78,fmt,fmt})
ppOpt({pp_IntFmt, fmt})
pp(a)

puts(1, "------------------------------\n")

fmt = "#%x\n"
printf(1, fmt, {a})
pretty_print(1, a, {0,3,1,78,fmt,fmt})
ppOpt({pp_IntFmt, fmt})
pp(a)

So what to do now?

Regards,
   Juergen