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To: <internals@lists.php.net>, "Andrei Zmievski" <andrei@gravitonic.com>
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Date: Wed, 29 Nov 2006 05:58:14 -0600
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Subject: Re: [PHP-DEV] Unicode chars allowed in numbers?
From: php_lists@realplain.com ("Matt Wilmas")

Hi Andrei,

One more related question: What about for any leading whitespace with
numeric strings, like in zend_u_strtol()?  Is u_isspace() needed, or are
only the ASCII-equivalents (0x20, 9-13 [\t, \n, \v, \f, \r]) allowed?


Thanks again,
Matt


----- Original Message -----
From: "Andrei Zmievski"
Sent: Friday, November 10, 2006

> > Hi Andrei, et al.,
> >
> > I was just looking at README.UNICODE, regarding interpretation of
> > numbers:
> > "we restrict numbers to consist only of ASCII digits," and "Numeric
> > strings
> > are supposed to adhere to the same rules."  Is it correct to take
> > that to
> > mean only UChar's with values from '0'-'9'/0x30-0x39 (and 'a'-'z'
> > equivalents for bases > 10)?
>
> Correct.
>
> > I ask because in zend_u_strtol(), HANDLE_U_NUMERIC() for array
> > keys, etc.,
> > the u_digit() function is used, which also allows non-ASCII, higher-
> > value
> > digit characters, doesn't it?  But then in is_numeric_unicode(), when
> > checking for hex numbers, the ASCII values '0' and 'x' are used,
> > which is
> > what I'd expect after reading README.UNICODE.
>
> You're correct here again, u_digit() should not be used there.
>
> -Andrei