From: Szabolcs Nagy <nsz@port70.net>
To: musl@lists.openwall.com
Subject: making math.h c89 compatible
Date: Mon, 23 Jul 2012 00:25:21 +0200 [thread overview]
Message-ID: <20120722222521.GH14463@port70.net> (raw)
[-- Attachment #1: Type: text/plain, Size: 117 bytes --]
__FLOAT_BITS macro uses compound literal
i think this is the only case where
standard c header is not c89 compatible
[-- Attachment #2: math.h.diff --]
[-- Type: text/x-diff, Size: 1110 bytes --]
diff --git a/include/math.h b/include/math.h
index d732648..ffde3da 100644
--- a/include/math.h
+++ b/include/math.h
@@ -44,8 +44,13 @@ int __fpclassifyl(long double);
union __float_repr { float __f; __uint32_t __i; };
union __double_repr { double __f; __uint64_t __i; };
+#if __STDC_VERSION__ >= 199901L
#define __FLOAT_BITS(f) (((union __float_repr){ (float)(f) }).__i)
#define __DOUBLE_BITS(f) (((union __double_repr){ (double)(f) }).__i)
+#else
+static __uint32_t __FLOAT_BITS(float __f) { union __float_repr __u = {__f}; return __u.__i; }
+static __uint64_t __DOUBLE_BITS(double __f) { union __double_repr __u = {__f}; return __u.__i; }
+#endif
#define fpclassify(x) ( \
sizeof(x) == sizeof(float) ? __fpclassifyf(x) : \
@@ -199,8 +204,8 @@ float fmodf(float, float);
long double fmodl(long double, long double);
double frexp(double, int *);
-float frexpf(float value, int *);
-long double frexpl(long double value, int *);
+float frexpf(float, int *);
+long double frexpl(long double, int *);
double hypot(double, double);
float hypotf(float, float);
reply other threads:[~2012-07-22 22:25 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20120722222521.GH14463@port70.net \
--to=nsz@port70.net \
--cc=musl@lists.openwall.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.vuxu.org/mirror/musl/
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).