From: matz@... (Yukihiro Matsumoto)
Date: 2000-11-21T01:33:25+09:00
Subject: [ruby-talk:6468] Re: Is there a FITS_IN_UINT(v)?

Hi,

In message "[ruby-talk:6464] Re: Is there a FITS_IN_UINT(v)?"
    on 00/11/21, Dave Thomas <Dave@thomases.com> writes:

|Alternatively,
|
|  if a is a Fixnum, then it fits

Not always, e.g. where sizeof(VALUE) == sizeof(long) > sizeof(int).

This case, you can define UINTABLE by using FIXNUM_P, NUM2LONG and
UINT_MAX.

|  if a is a Bignum then
|     it fits if a.size <= sizeof(int)

You have to define how to handle negative Bignums first.  Since
Bignums have independent sign, -0xffff_ffff, for example, does not fit
in 32 bit integer.

							matz.