Mercurial > gnulib
view lib/ilogb.c @ 17363:5a51fb7777a9
sys_select, sys_time: port 2013-01-30 Solaris 2.6 fix to Cygwin
Problem reported by Marco Atzeri in
<http://lists.gnu.org/archive/html/bug-gnulib/2013-03/msg00000.html>.
* lib/sys_select.in.h [HAVE_SYS_SELECT_H && _CYGWIN_SYS_TIME_H]:
Simply delegate to the system <sys/select.h> in this case too.
Also, pay attention to _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H only
if OSF/1, since otherwise Cygwin breaks, and it doesn't seem to
be needed on Solaris either.
* lib/sys_time.in.h [_CYGWIN_SYS_TIME_H]:
Simply delgate to the system <sys/time.h> in this case.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Tue, 19 Mar 2013 09:08:47 -0700 |
parents | e542fd46ad6f |
children | 344018b6e5d7 |
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/* Floating-point exponent. Copyright (C) 2012-2013 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #if ! (defined USE_LONG_DOUBLE || defined USE_FLOAT) # include <config.h> #endif /* Specification. */ #include <math.h> #include <limits.h> #ifdef USE_LONG_DOUBLE # define ILOGB ilogbl # define DOUBLE long double # define L_(literal) literal##L # define FREXP frexpl # define ISNAN isnanl #elif ! defined USE_FLOAT # define ILOGB ilogb # define DOUBLE double # define L_(literal) literal # define FREXP frexp # define ISNAN isnand #else /* defined USE_FLOAT */ # define ILOGB ilogbf # define DOUBLE float # define L_(literal) literal##f # define FREXP frexpf # define ISNAN isnanf #endif int ILOGB (DOUBLE x) { if (isfinite (x)) { if (x == L_(0.0)) return FP_ILOGB0; else { int e; (void) FREXP (x, &e); return e - 1; } } else { if (ISNAN (x)) return FP_ILOGBNAN; else return INT_MAX; } }