1//===-- IsInf.cpp - Platform-independent wrapper around C99 isinf() -------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// Platform-independent wrapper around C99 isinf()
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/Config/config.h"
15
16#if HAVE_ISINF_IN_MATH_H
17# include <math.h>
18#elif HAVE_ISINF_IN_CMATH
19# include <cmath>
20#elif HAVE_STD_ISINF_IN_CMATH
21# include <cmath>
22using std::isinf;
23#elif HAVE_FINITE_IN_IEEEFP_H
24// A handy workaround I found at http://www.unixguide.net/sun/faq ...
25// apparently this has been a problem with Solaris for years.
26# include <ieeefp.h>
27static int isinf(double x) { return !finite(x) && x==x; }
28#elif defined(_MSC_VER)
29#include <float.h>
30#define isinf(X) (!_finite(X))
31#elif defined(_AIX) && defined(__GNUC__)
32// GCC's fixincludes seems to be removing the isinf() declaration from the
33// system header /usr/include/math.h
34# include <math.h>
35static int isinf(double x) { return !finite(x) && x==x; }
36#elif defined(__hpux)
37// HP-UX is "special"
38#include <math.h>
39static int isinf(double x) { return ((x) == INFINITY) || ((x) == -INFINITY); }
40#else
41# error "Don't know how to get isinf()"
42#endif
43
44namespace llvm {
45
46int IsInf(float f)  { return isinf(f); }
47int IsInf(double d) { return isinf(d); }
48
49} // end namespace llvm;
50