43 lines
869 B
C++
43 lines
869 B
C++
#ifndef XGBOOST_UTILS_MATH_H_
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#define XGBOOST_UTILS_MATH_H_
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/*!
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* \file math.h
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* \brief support additional math
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* \author Tianqi Chen
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*/
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#include <cmath>
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namespace xgboost {
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namespace utils {
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#ifdef XGBOOST_STRICT_CXX98_
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// check nan
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bool CheckNAN(double v);
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double LogGamma(double v);
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#else
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template<typename T>
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inline bool CheckNAN(T v) {
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#ifdef _MSC_VER
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return (_isnan(v) != 0);
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#else
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return isnan(v);
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#endif
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}
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template<typename T>
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inline T LogGamma(T v) {
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#ifdef _MSC_VER
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#if _MSC_VER >= 1800
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return lgamma(v);
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#else
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#pragma message ("Warning: lgamma function was not available until VS2013, poisson regression will be disabled")
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utils::Error("lgamma function was not available until VS2013");
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return static_cast<T>(1.0);
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#endif
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#else
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return lgamma(v);
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#endif
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}
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#endif
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} // namespace utils
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} // namespace xgboost
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#endif // XGBOOST_UTILS_MATH_H_
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