| // Ceres Solver - A fast non-linear least squares minimizer |
| // Copyright 2015 Google Inc. All rights reserved. |
| // http://ceres-solver.org/ |
| // |
| // 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 |
| |
| #include <limits> |
| |
| namespace ceres { |
| |
| #if defined(_MSC_VER) |
| |
| inline bool IsFinite (double x) { return _finite(x) != 0; } |
| inline bool IsInfinite(double x) { return _finite(x) == 0 && _isnan(x) == 0; } |
| inline bool IsNaN (double x) { return _isnan(x) != 0; } |
| inline bool IsNormal (double x) { // NOLINT |
| const int classification = _fpclass(x); |
| return (classification == _FPCLASS_NN || classification == _FPCLASS_PN); |
| } |
| |
| # else |
| |
| // These definitions are for the normal Unix suspects. |
| 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_ |
