From: Bruno Haible <bruno@clisp.org>
Date: Sun, 25 Feb 2007 18:08:24 +0000 (+0000)
Subject: Add comment about FLT_RADIX.
X-Git-Tag: cvs-readonly~965
X-Git-Url: http://erislabs.org.uk/gitweb/?a=commitdiff_plain;h=c4dcbfedc7468a2d820ffa82e656eaf75b159c0e;p=gnulib.git

Add comment about FLT_RADIX.
---

diff --git a/lib/printf-frexp.c b/lib/printf-frexp.c
index 46750e485..e6032a4fb 100644
--- a/lib/printf-frexp.c
+++ b/lib/printf-frexp.c
@@ -29,6 +29,10 @@
 # include <float.h>
 # include <math.h>
 
+/* This file assumes FLT_RADIX = 2.  If FLT_RADIX is a power of 2 greater
+   than 2, or not even a power of 2, some rounding errors can occur, so that
+   then the returned mantissa is only guaranteed to be <= 2.0, not < 2.0.  */
+
 # ifdef USE_LONG_DOUBLE
 #  define FUNC printf_frexpl
 #  define DOUBLE long double