[src/trunk]: src/lib/libc/stdlib Fix infinity detection with isinf(d), not d ...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3a871d4820d3
branches:  trunk
changeset: 348734:3a871d4820d3
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Fri Nov 04 19:18:53 2016 +0000

description:
Fix infinity detection with isinf(d), not d == HUGE_VAL.

Negative infinity counts as overflow too.

Simplify.

diffstat:

 lib/libc/stdlib/strtod.3 |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (21 lines):

diff -r 4abf45efaec9 -r 3a871d4820d3 lib/libc/stdlib/strtod.3
--- a/lib/libc/stdlib/strtod.3  Fri Nov 04 19:18:50 2016 +0000
+++ b/lib/libc/stdlib/strtod.3  Fri Nov 04 19:18:53 2016 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: strtod.3,v 1.24 2016/11/04 19:10:04 riastradh Exp $
+.\"    $NetBSD: strtod.3,v 1.25 2016/11/04 19:18:53 riastradh Exp $
 .\"
 .\" Copyright (c) 1990, 1991, 1993
 .\"    The Regents of the University of California.  All rights reserved.
@@ -202,9 +202,9 @@
        errx(1, "invalid syntax");
 if (errno) {
        assert(errno == ERANGE);
-       assert(d == HUGE_VAL || d == -HUGE_VAL || d == 0 ||
+       assert(isinf(d) || d == 0 ||
            fpclassify(d) == FP_SUBNORMAL);
-       warnx("%s", d == HUGE_VAL ? "overflow" : "underflow");
+       warnx("%s", isinf(d) ? "overflow" : "underflow");
 }
 /* d is the best floating-point approximation to the number in s */
 .Ed