Port Ceres to Windows
This is a preliminary, but full, port of Ceres to Windows.
Currently all tests compile and run, with only system_test
failing to work correctly due to a path issue.
Change-Id: I4152c1588bf51ffd7f4d9401ef9759f5d28c299c
diff --git a/include/ceres/fpclassify.h b/include/ceres/fpclassify.h
index 59424bf..550d4d4 100644
--- a/include/ceres/fpclassify.h
+++ b/include/ceres/fpclassify.h
@@ -37,12 +37,28 @@
#ifndef CERES_PUBLIC_FPCLASSIFY_H_
#define CERES_PUBLIC_FPCLASSIFY_H_
+#if defined(_MSC_VER)
+#include <float.h>
+#endif
+
namespace ceres {
+#if defined(_MSC_VER)
+inline bool IsFinite (double x) { return _finite(x); }
+inline bool IsInfinite(double x) { return !_finite(x) && !_isnan(x); }
+inline bool IsNaN (double x) { return _isnan(x); }
+inline bool IsNormal (double x) {
+ int classification = _fpclass(x);
+ return classification == _FPCLASS_NN ||
+ classification == _FPCLASS_PN;
+}
+#else
+// TODO(keir): Test the "else" with more platforms.
inline bool IsFinite (double x) { return std::isfinite(x); }
inline bool IsInfinite(double x) { return std::isinf(x); }
inline bool IsNaN (double x) { return std::isnan(x); }
inline bool IsNormal (double x) { return std::isnormal(x); }
+#endif
} // namespace ceres
