Hello. Is there an alternative to the macros in this header? My
program uses some of them (DBL_MIN, DBL_MAX, DBL_EPSILON), and
including yields name clashes. Thanks.

Why not change your program not to use
standard names for its own purposes?

Russ

On Aug 5, 2008, at 7:43 PM, Russ Cox wrote:

In this case, "its own purposes" == "allowing the user to choose that
as a parameter to an expression."

I'm so confused. Why don't you just show the code.

ron

On Aug 5, 2008, at 11:14 PM, ron minnich wrote:

#include
...
#include
...

static struct{
char *name;
double value;
}constants[] = {
...
"MIN", DBL_MIN,
"MAX", DBL_MAX,
"EPSILON", DBL_EPSILON,
...
};

it's surprisingly important not to leave out important information, such as
what important things were in the "..." (other include files) and, most importantly, the particular "name clashes".

i'd noticed you were using not which i'd thought curious
(were you mixing APE and Plan 9 include files?) but like most others i'd initially
assumed the "name clashes" had to do with the DBL_ names. odd.

guessing that the "..." contained "#include " and trying a little test,
I find that probably the "name clashes" were (was?) probably singular:

/386/include/ape/float.h:43 yy.c:3 redeclare tag: FPdbleword

so now we know the problem, what to do about it?
i know an unpleasant way but perhaps someone else can think of a good way to get those
values outside the APE include files. libc.h doesn't define equivalents.
perhaps the values aren't actually all that useful (i'm not sure how i'd use
them myself in a calculator, for instance).

On Aug 6, 2008, at 4:06 AM, Charles Forsyth wrote:

as far as i know, all plan 9 compilers use IEEE 754-compatable semantics
(at least insomuch as allowed by hardware). thus the minima and maxima,
ε, and underflow properties depend on IEEE 754, not the processor.

/sys/doc/port.ps has the most complete information, but i would imagine
that the powerpc and arm information is slightly out-of-date.

- erik

In article mac.com>,
Pietro Gagliardi mac.com> wrote:

On Aug 6, 2008, at 12:29 PM, Greg Comeau wrote:

I don't know, but your idea gave me something that did:

%% cat mach.c
#include

double dblmin = DBL_MIN;
double dblmax = DBL_MAX;
double dbleps = DBL_EPS;
%% cat builtins.c
...
extern double dblmin, dblmax, dbleps;
...
install(s_copy("MIN"), CONSTANT, dblmin);
install(s_copy("MAX"), CONSTANT, dblmax);
install(s_copy("EPSILON"), CONSTANT, dbleps);
...