forked from OSchip/llvm-project
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
//===-- IsInf.cpp - Platform-independent wrapper around C99 isinf() -------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Platform-independent wrapper around C99 isinf()
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Config/config.h"
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#if HAVE_ISINF_IN_MATH_H
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# include <math.h>
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#elif HAVE_ISINF_IN_CMATH
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# include <cmath>
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#elif HAVE_STD_ISINF_IN_CMATH
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# include <cmath>
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using std::isinf;
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#elif HAVE_FINITE_IN_IEEEFP_H
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// A handy workaround I found at http://www.unixguide.net/sun/faq ...
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// apparently this has been a problem with Solaris for years.
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# include <ieeefp.h>
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static int isinf(double x) { return !finite(x) && x==x; }
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#elif defined(_MSC_VER)
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#include <float.h>
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#define isinf(X) (!_finite(X))
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#elif defined(_AIX) && defined(__GNUC__)
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// GCC's fixincludes seems to be removing the isinf() declaration from the
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// system header /usr/include/math.h
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# include <math.h>
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static int isinf(double x) { return !finite(x) && x==x; }
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#elif defined(__hpux)
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// HP-UX is "special"
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#include <math.h>
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static int isinf(double x) { return ((x) == INFINITY) || ((x) == -INFINITY); }
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#else
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# error "Don't know how to get isinf()"
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#endif
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namespace llvm {
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int IsInf(float f) { return isinf(f); }
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int IsInf(double d) { return isinf(d); }
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} // end namespace llvm;
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