On Thursday 04 October 2001 11:22 am, Dan Sugalski wrote:
> At 11:16 AM 10/4/2001 -0400, Bryan C. Warnock wrote:
> >Since pointers and integers are now considered incommensurate, the only
> >integer that can be safely converted to a pointer is the constant 0.
> > The result of converting any oth
At 11:16 AM 10/4/2001 -0400, Bryan C. Warnock wrote:
>Since pointers and integers are now considered incommensurate, the only
>integer that can be safely converted to a pointer is the constant 0. The
>result of converting any other integer to a pointer is machine dependent.
Since the only place
At 07:16 PM 10/4/2001 +0400, Timur Safin wrote:
>ptrdiff_t
> Signed integral type of the result of subtracting two pointers.
Ah, signed. Forgot about that.
size_t would be better, then. Absolute addresses are unsigned.
Dan
---
On Thursday 04 October 2001 11:08 am, Bryan C. Warnock wrote:
> In C9x, pointer-integer conversions (except for 0) aren't guaranteed for
> doing pointer arithmetic. (There was a good explanation that I ran across
> the other day, but I can't seem to find it now.)
Found it. The ANSI rationale
tgibbs" <[EMAIL PROTECTED]>
To: "'Bryan C. Warnock '" <[EMAIL PROTECTED]>; "Gibbs Tanton - tgibbs"
<[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Thursday, October 04, 2001 6:48 PM
Subject: RE: replacing INTVAL in memory and register
:
On Thursday 04 October 2001 10:48 am, Gibbs Tanton - tgibbs wrote:
> My ANSI and ISO Standard C reference manual (Plauger and Brodie) has it
> listed in with the comment:
>
> ptrdiff_t( which is the type of the subtract operator when its operands
> are both pointers to data objects ).
>
> Althoug
-Original Message-
From: Bryan C. Warnock
To: Gibbs Tanton - tgibbs; '[EMAIL PROTECTED]'
Sent: 10/4/2001 9:41 AM
Subject: Re: replacing INTVAL in memory and register
On Thursday 04 October 2001 10:38 am, Gibbs Tanton - tgibbs wrote:
> INTVAL is used in memory and register to cast a
On Thursday 04 October 2001 10:38 am, Gibbs Tanton - tgibbs wrote:
> INTVAL is used in memory and register to cast a pointer to an integer for
> mathematical operators. Instead of using INTVAL I propose we use
> ptrdiff_t or size_t (with my preference being the former). It would not
> be used an
At 09:38 AM 10/4/2001 -0500, Gibbs Tanton - tgibbs wrote:
>INTVAL is used in memory and register to cast a pointer to an integer for
>mathematical operators. Instead of using INTVAL I propose we use ptrdiff_t
>or size_t (with my preference being the former).
Is ptrdiff_t a base type that crept i
INTVAL is used in memory and register to cast a pointer to an integer for
mathematical operators. Instead of using INTVAL I propose we use ptrdiff_t
or size_t (with my preference being the former). It would not be used
anywhere else, just when we need to do mathematics on pointers. Both are
giv
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