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Check for lround with autoconf; fall back to rint.

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This commit is contained in:
Nick Mathewson 2011-08-30 22:22:15 -04:00
parent 03760f6c6f
commit 0ac4b0f99d
2 changed files with 6 additions and 4 deletions
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2
configure.in
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@ -223,7 +223,7 @@ dnl -------------------------------------------------------------------
dnl Check for functions before libevent, since libevent-1.2 apparently
dnl exports strlcpy without defining it in a header.
AC_CHECK_FUNCS(gettimeofday ftime socketpair uname inet_aton strptime getrlimit strlcat strlcpy strtoull getaddrinfo localtime_r gmtime_r memmem strtok_r writev readv flock prctl vasprintf)
AC_CHECK_FUNCS(gettimeofday ftime socketpair uname inet_aton strptime getrlimit strlcat strlcpy strtoull getaddrinfo localtime_r gmtime_r memmem strtok_r writev readv flock prctl vasprintf lround rint)
using_custom_malloc=no
if test x$enable_openbsd_malloc = xyes ; then

8
src/common/util.c
View File

@ -334,10 +334,12 @@ tor_mathlog(double d)
long
tor_lround(double d)
{
#ifdef _MSC_VER
return (long)(d > 0 ? d + 0.5 : ceil(d - 0.5));
#else
#if defined(HAVE_LROUND)
return lround(d);
#elif defined(HAVE_RINT)
return (long)rint(d);
#else
return (long)(d > 0 ? d + 0.5 : ceil(d - 0.5));
#endif
}