unsigned long long

**Joona I Palaste** · Nov 13 '05, 10:42 PM

Re: unsigned long long

Richard A. Huebner <encprof@yahoo. com> scribbled the following:[color=blue]
> Is the unsigned long long primitive data type supported in ANSI
> standard C?[/color]

In C99, yes. In C90, no. Most current implementations of ANSI standard
C are still C90.
[color=blue]
> I've tried using it a couple of times in standard C, but to no avail.
> I'm using both MS VIsual C++ 6, as well as the gcc compiler that comes
> with RedHat linux 9.[/color]
[color=blue]
> If not, what data type will yield the largest unsigned integer for me?[/color]

unsigned long.

--
/-- Joona Palaste (palaste@cc.hel sinki.fi) ------------- Finland --------\
\-- http://www.helsinki.fi/~palaste --------------------- rules! --------/
"I wish someone we knew would die so we could leave them flowers."
- A 6-year-old girl, upon seeing flowers in a cemetery

**Tom St Denis** · Nov 13 '05, 10:42 PM

Re: unsigned long long

"Joona I Palaste" <palaste@cc.hel sinki.fi> wrote in message
news:borl51$lbd $1@oravannahka. helsinki.fi...[color=blue][color=green]
> > I've tried using it a couple of times in standard C, but to no avail.
> > I'm using both MS VIsual C++ 6, as well as the gcc compiler that comes
> > with RedHat linux 9.[/color]
>[color=green]
> > If not, what data type will yield the largest unsigned integer for me?[/color]
>
> unsigned long.[/color]

Actually GCC has supported "unsigned long long" for quite some time. MSVC
supports "unsigned __int64" which is a 64-bit type..

Tom

**Nudge** · Nov 13 '05, 10:42 PM

Re: unsigned long long

Richard A. Huebner wrote:[color=blue]
> If not, what data type will yield the largest unsigned integer
> for me?[/color]

I don't know how to answer your question.

uint64_t might be useful still?

**Joona I Palaste** · Nov 13 '05, 10:42 PM

Re: unsigned long long

Tom St Denis <tomstdenis@iah u.ca> scribbled the following:[color=blue]
> "Joona I Palaste" <palaste@cc.hel sinki.fi> wrote in message
> news:borl51$lbd $1@oravannahka. helsinki.fi...[color=green][color=darkred]
>> > I've tried using it a couple of times in standard C, but to no avail.
>> > I'm using both MS VIsual C++ 6, as well as the gcc compiler that comes
>> > with RedHat linux 9.[/color]
>>[color=darkred]
>> > If not, what data type will yield the largest unsigned integer for me?[/color]
>>
>> unsigned long.[/color][/color]
[color=blue]
> Actually GCC has supported "unsigned long long" for quite some time. MSVC
> supports "unsigned __int64" which is a 64-bit type..[/color]

Yes, but hardly in ANSI standard C, or what?

--
/-- Joona Palaste (palaste@cc.hel sinki.fi) ------------- Finland --------\
\-- http://www.helsinki.fi/~palaste --------------------- rules! --------/
"Immanuel Kant but Genghis Khan."
- The Official Graffitist's Handbook

**Tom St Denis** · Nov 13 '05, 10:42 PM

Re: unsigned long long

"Joona I Palaste" <palaste@cc.hel sinki.fi> wrote in message
news:borm04$lnc $1@oravannahka. helsinki.fi...[color=blue]
> Tom St Denis <tomstdenis@iah u.ca> scribbled the following:[color=green]
> > "Joona I Palaste" <palaste@cc.hel sinki.fi> wrote in message
> > news:borl51$lbd $1@oravannahka. helsinki.fi...[color=darkred]
> >> > I've tried using it a couple of times in standard C, but to no avail.
> >> > I'm using both MS VIsual C++ 6, as well as the gcc compiler that[/color][/color][/color]
comes[color=blue][color=green][color=darkred]
> >> > with RedHat linux 9.
> >>
> >> > If not, what data type will yield the largest unsigned integer for[/color][/color][/color]
me?[color=blue][color=green][color=darkred]
> >>
> >> unsigned long.[/color][/color]
>[color=green]
> > Actually GCC has supported "unsigned long long" for quite some time.[/color][/color]
MSVC[color=blue][color=green]
> > supports "unsigned __int64" which is a 64-bit type..[/color]
>
> Yes, but hardly in ANSI standard C, or what?[/color]

ANSI is old. I for one welcome our new ISO overlords.

Tom

**Joona I Palaste** · Nov 13 '05, 10:42 PM

Re: unsigned long long

Tom St Denis <tomstdenis@iah u.ca> scribbled the following:[color=blue]
> "Joona I Palaste" <palaste@cc.hel sinki.fi> wrote in message
> news:borm04$lnc $1@oravannahka. helsinki.fi...[color=green]
>> Tom St Denis <tomstdenis@iah u.ca> scribbled the following:[color=darkred]
>> > "Joona I Palaste" <palaste@cc.hel sinki.fi> wrote in message
>> > news:borl51$lbd $1@oravannahka. helsinki.fi...
>> >> > I've tried using it a couple of times in standard C, but to no avail.
>> >> > I'm using both MS VIsual C++ 6, as well as the gcc compiler that[/color][/color]
> comes[color=green][color=darkred]
>> >> > with RedHat linux 9.
>> >>
>> >> > If not, what data type will yield the largest unsigned integer for[/color][/color]
> me?[color=green][color=darkred]
>> >>
>> >> unsigned long.[/color]
>>[color=darkred]
>> > Actually GCC has supported "unsigned long long" for quite some time.[/color][/color]
> MSVC[color=green][color=darkred]
>> > supports "unsigned __int64" which is a 64-bit type..[/color]
>>
>> Yes, but hardly in ANSI standard C, or what?[/color][/color]
[color=blue]
> ANSI is old. I for one welcome our new ISO overlords.[/color]

I would think that the difference between the ANSI and ISO versions of
the C standard is entirely bureaucratic and has no effect on the
technical content.

--
/-- Joona Palaste (palaste@cc.hel sinki.fi) ------------- Finland --------\
\-- http://www.helsinki.fi/~palaste --------------------- rules! --------/
"'So called' means: 'There is a long explanation for this, but I have no
time to explain it here.'"
- JIPsoft

**Tom St Denis** · Nov 13 '05, 10:42 PM

Re: unsigned long long

"Joona I Palaste" <palaste@cc.hel sinki.fi> wrote in message
news:bormbg$lut $1@oravannahka. helsinki.fi...[color=blue][color=green]
> > ANSI is old. I for one welcome our new ISO overlords.[/color]
>
> I would think that the difference between the ANSI and ISO versions of
> the C standard is entirely bureaucratic and has no effect on the
> technical content.[/color]

Be that as it may "unsigned long long" is part of ISOC AFAIK.

Tom

**Joona I Palaste** · Nov 13 '05, 10:42 PM

Re: unsigned long long

Tom St Denis <tomstdenis@iah u.ca> scribbled the following:[color=blue]
> "Joona I Palaste" <palaste@cc.hel sinki.fi> wrote in message
> news:bormbg$lut $1@oravannahka. helsinki.fi...[color=green][color=darkred]
>> > ANSI is old. I for one welcome our new ISO overlords.[/color]
>>
>> I would think that the difference between the ANSI and ISO versions of
>> the C standard is entirely bureaucratic and has no effect on the
>> technical content.[/color][/color]
[color=blue]
> Be that as it may "unsigned long long" is part of ISOC AFAIK.[/color]

ISO C99, Tom. Not ISO C90.

--
/-- Joona Palaste (palaste@cc.hel sinki.fi) ------------- Finland --------\
\-- http://www.helsinki.fi/~palaste --------------------- rules! --------/
"I am looking for myself. Have you seen me somewhere?"
- Anon

**Tom St Denis** · Nov 13 '05, 10:42 PM

Re: unsigned long long

"Joona I Palaste" <palaste@cc.hel sinki.fi> wrote in message
news:bormg1$lut $2@oravannahka. helsinki.fi...[color=blue]
> Tom St Denis <tomstdenis@iah u.ca> scribbled the following:[color=green]
> > "Joona I Palaste" <palaste@cc.hel sinki.fi> wrote in message
> > news:bormbg$lut $1@oravannahka. helsinki.fi...[color=darkred]
> >> > ANSI is old. I for one welcome our new ISO overlords.
> >>
> >> I would think that the difference between the ANSI and ISO versions of
> >> the C standard is entirely bureaucratic and has no effect on the
> >> technical content.[/color][/color]
>[color=green]
> > Be that as it may "unsigned long long" is part of ISOC AFAIK.[/color]
>
> ISO C99, Tom. Not ISO C90.[/color]

Tom assumes we're dealing with the latest not the oldest.

Otherwise crack out some K&R !

Tom

**P.J. Plauger** · Nov 13 '05, 10:42 PM

Re: unsigned long long

"Tom St Denis" <tomstdenis@iah u.ca> wrote in message
news:P1dsb.2348 $iD1.1109@news0 4.bloor.is.net. cable.rogers.co m...
[color=blue]
> "Joona I Palaste" <palaste@cc.hel sinki.fi> wrote in message
> news:bormbg$lut $1@oravannahka. helsinki.fi...[color=green][color=darkred]
> > > ANSI is old. I for one welcome our new ISO overlords.[/color]
> >
> > I would think that the difference between the ANSI and ISO versions of
> > the C standard is entirely bureaucratic and has no effect on the
> > technical content.[/color]
>
> Be that as it may "unsigned long long" is part of ISOC AFAIK.[/color]

The current ANSI standard for C is identical to the current ISO
standard for C, aka C99.

P.J. Plauger
Dinkumware, Ltd.

503 Service Unavailable

http://www.dinkumware.com

**Joe Wright** · Nov 13 '05, 10:42 PM

Re: unsigned long long

Richard A. Huebner wrote:[color=blue]
>
> Is the unsigned long long primitive data type supported in ANSI
> standard C?
>
> I've tried using it a couple of times in standard C, but to no avail.
> I'm using both MS VIsual C++ 6, as well as the gcc compiler that comes
> with RedHat linux 9.
>
> If not, what data type will yield the largest unsigned integer for me?
>
> Thanks for your help,
>
> Rich[/color]

Try this.

/*
Sizes of various things in bits..
*/
#include <stdio.h>
#include <limits.h>

int main(void) {
unsigned int a, b, c;
unsigned long long x, y, z;

c = -1;
b = 1 << (sizeof(int)*CH AR_BIT-1);
a = ~b;

z = -1;
y = 1LL << (sizeof(long long)*CHAR_BIT-1);
x = ~y;

printf("Size of void = %2lu bits\n", sizeof(void) *
CHAR_BIT);
printf("Size of char = %2lu bits\n", sizeof(char) *
CHAR_BIT);
printf("Size of short = %2lu bits\n", sizeof(short) *
CHAR_BIT);
printf("Size of int = %2lu bits\n", sizeof(int) *
CHAR_BIT);
printf("Size of long = %2lu bits\n", sizeof(long) *
CHAR_BIT);
printf("Size of long long = %2lu bits\n", sizeof(long long) *
CHAR_BIT);
printf("Size of int * = %2lu bits\n", sizeof(int *) *
CHAR_BIT);
printf("Size of char * = %2lu bits\n", sizeof(char *) *
CHAR_BIT);
printf("Size of void * = %2lu bits\n", sizeof(void *) *
CHAR_BIT);
printf("Size of float = %2lu bits\n", sizeof(float) *
CHAR_BIT);
printf("Size of double = %2lu bits\n", sizeof(double) *
CHAR_BIT);
printf("Size of long double = %2lu bits\n", sizeof(long double) *
CHAR_BIT);
printf("Max int = %11d\n", a);
printf("Min int = %11d\n", b);
printf("Max unsigned int = %11u\n", c);
printf("Max long long = %20lld\n", x);
printf("Min long long = %20lld\n", y);
printf("Max unsigned long long = %20llu\n", z);
return 0;
}

--
Joe Wright http://www.jw-wright.com
"Everything should be made as simple as possible, but not simpler."
--- Albert Einstein ---

**Eric Sosman** · Nov 13 '05, 10:42 PM

Re: unsigned long long

Joe Wright wrote:[color=blue]
>
> Richard A. Huebner wrote:[color=green]
> >
> > Is the unsigned long long primitive data type supported in ANSI
> > standard C?
> >
> > I've tried using it a couple of times in standard C, but to no avail.
> > I'm using both MS VIsual C++ 6, as well as the gcc compiler that comes
> > with RedHat linux 9.
> >
> > If not, what data type will yield the largest unsigned integer for me?
> >
> > Thanks for your help,
> >
> > Rich[/color]
>
> Try this.
> [code snipped; see up-thread][/color]

I tried it, and the compiler said:

"foo.c", line 12: warning: integer overflow detected: op "<<"
"foo.c", line 19: cannot take sizeof void
cc: acomp failed for foo.c

--
Eric.Sosman@sun .com

**Richard Heathfield** · Nov 13 '05, 10:43 PM

Re: unsigned long long

Joe Wright wrote:

<snip>
[color=blue]
> printf("Size of char = %2lu bits\n", sizeof(char) *
> CHAR_BIT);[/color]

Apart from Eric's comments, you may find it a good idea to cast the
expression sizeof(char) * CHAR_BIT to unsigned long before passing it to a
variadic function such as printf.

--
Richard Heathfield : binary@eton.pow ernet.co.uk
"Usenet is a strange place." - Dennis M Ritchie, 29 July 1999.
C FAQ: http://www.eskimo.com/~scs/C-faq/top.html
K&R answers, C books, etc: http://users.powernet.co.uk/eton

**Joe Wright** · Nov 13 '05, 10:43 PM

Re: unsigned long long

Eric Sosman wrote:[color=blue]
>
> Joe Wright wrote:[color=green]
> >
> > Richard A. Huebner wrote:[color=darkred]
> > >
> > > Is the unsigned long long primitive data type supported in ANSI
> > > standard C?
> > >
> > > I've tried using it a couple of times in standard C, but to no avail.
> > > I'm using both MS VIsual C++ 6, as well as the gcc compiler that comes
> > > with RedHat linux 9.
> > >
> > > If not, what data type will yield the largest unsigned integer for me?
> > >
> > > Thanks for your help,
> > >
> > > Rich[/color]
> >
> > Try this.
> > [code snipped; see up-thread][/color]
>
> I tried it, and the compiler said:
>
> "foo.c", line 12: warning: integer overflow detected: op "<<"
> "foo.c", line 19: cannot take sizeof void
> cc: acomp failed for foo.c
>[/color]
What was wrong? Should ..
y = 1LL << (sizeof(long long)*CHAR_BIT-1);
be
y = 1ULL << (sizeof(long long)*CHAR_BIT-1);
or something?
--
Joe Wright http://www.jw-wright.com
"Everything should be made as simple as possible, but not simpler."
--- Albert Einstein ---

unsigned long long

unsigned long long

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