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79 lines
1.6 KiB
C++
79 lines
1.6 KiB
C++
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_PLATFORM_C99_SUPPORT_WIN_H_
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#define RUNTIME_PLATFORM_C99_SUPPORT_WIN_H_
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#if defined(_MSC_VER) && (_MSC_VER < 1800)
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// Before Visual Studio 2013 Visual C++ was missing a bunch of C99 math macros
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// and functions. Define them here.
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#include <float.h>
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#include <string.h>
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#include <cmath>
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static const unsigned __int64 kQuietNaNMask =
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static_cast<unsigned __int64>(0xfff) << 51;
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#ifndef va_copy
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#define va_copy(dst, src) (memmove(&(dst), &(src), sizeof(dst)))
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#endif /* va_copy */
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#define NAN *reinterpret_cast<const double*>(&kQuietNaNMask)
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namespace std {
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static inline int isinf(double x) {
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return (_fpclass(x) & (_FPCLASS_PINF | _FPCLASS_NINF)) != 0;
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}
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static inline int isnan(double x) {
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return _isnan(x);
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}
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static inline int signbit(double x) {
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if (x == 0) {
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return _fpclass(x) & _FPCLASS_NZ;
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} else {
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return x < 0;
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}
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}
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} // namespace std
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static inline double trunc(double x) {
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if (x < 0) {
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return ceil(x);
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} else {
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return floor(x);
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}
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}
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static inline double round(double x) {
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if (!_finite(x)) {
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return x;
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}
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double intpart;
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double fractpart = modf(x, &intpart);
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if (fractpart >= 0.5) {
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return intpart + 1;
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} else if (fractpart > -0.5) {
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return intpart;
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} else {
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return intpart - 1;
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}
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}
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// Windows does not have strtoll defined.
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#if defined(_MSC_VER)
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#define strtoll _strtoi64
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#endif
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#endif
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#endif // RUNTIME_PLATFORM_C99_SUPPORT_WIN_H_
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