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From: Mirsad Todorovac
Subject: `Val' function problems
Date: 7 Aug 2003, 14:31:54

Hi!

We spoke earlier about the problem with ec in

    Val (source, x, ec)

function, and Frank said it will be fixed in next release (it's exhibited
again in '12#11invalid').

Consider the following second problem that `Val' returns '0' if he finds
more than one non-digit character in `source' string. If there's only one
or zero erroneous digits at the end of number, `Val' converts the number
to `x'.

1. Does Borland Pascal do teh same, or is it a GPC bug?

2. Is the base prefix a GNU Pascal extension, or is it present in
   BP too (relevant for docs page)?

3. Val ('$100000000, x, ec) gives
   x := 0; ec := 0;

   There seem to be no indication of overflow error in this case.

Thanks,
Mirsad

program val;
uses GPC;
var i, ec: Integer;
    s : String;
begin
  repeat
    ReadLn (s);
    Val (s, i, ec);
    WriteLn (i, ' ', ec);
  until i = 1000
end.

bash-2.05b$ gpc --automake val.pas
val.pas:4: warning: missing string capacity -- assuming 255
bash-2.05b$ a.out
12#11
13 0
12#11invalid
0 7
16#ffffg
65535 8
12#11c
13 6
12#11i
13 6
12#11in
0 7
12#11cc
0 7
$ffff
65535 0
$ffffg
65535 6
$ffffgg
0 7
$ffffffff
-1 0
16#ffffffff
-1 0
$100000000
0 0

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