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Diffstat (limited to 'extern/libmv/third_party/ceres/include/ceres/fpclassify.h')
-rw-r--r-- | extern/libmv/third_party/ceres/include/ceres/fpclassify.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/extern/libmv/third_party/ceres/include/ceres/fpclassify.h b/extern/libmv/third_party/ceres/include/ceres/fpclassify.h new file mode 100644 index 00000000000..5a9ea1599d2 --- /dev/null +++ b/extern/libmv/third_party/ceres/include/ceres/fpclassify.h @@ -0,0 +1,88 @@ +// Ceres Solver - A fast non-linear least squares minimizer +// Copyright 2012 Google Inc. All rights reserved. +// http://code.google.com/p/ceres-solver/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are met: +// +// * Redistributions of source code must retain the above copyright notice, +// this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above copyright notice, +// this list of conditions and the following disclaimer in the documentation +// and/or other materials provided with the distribution. +// * Neither the name of Google Inc. nor the names of its contributors may be +// used to endorse or promote products derived from this software without +// specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +// POSSIBILITY OF SUCH DAMAGE. +// +// Author: keir@google.com (Keir Mierle) +// +// Portable floating point classification. The names are picked such that they +// do not collide with macros. For example, "isnan" in C99 is a macro and hence +// does not respect namespaces. +// +// TODO(keir): Finish porting! + +#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; +} +#elif defined(ANDROID) + +// On Android when using the GNU STL, the C++ fpclassify functions are not +// available. Strictly speaking, the std functions are are not standard until +// C++11. Instead use the C99 macros on Android. +inline bool IsNaN (double x) { return isnan(x); } +inline bool IsNormal (double x) { return isnormal(x); } + +// On Android NDK r6, when using STLPort, the isinf and isfinite functions are +// not available, so reimplement them. +# if defined(_STLPORT_VERSION) +inline bool IsInfinite(double x) { + return x == std::numeric_limits<double>::infinity() || + x == -std::numeric_limits<double>::infinity(); +} +inline bool IsFinite(double x) { + return !isnan(x) && !IsInfinite(x); +} +# else +inline bool IsFinite (double x) { return isfinite(x); } +inline bool IsInfinite(double x) { return isinf(x); } +# endif // defined(_STLPORT_VERSION) +#else +// These definitions are for the normal Unix suspects. +// 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 + +#endif // CERES_PUBLIC_FPCLASSIFY_H_ |