// 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 #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) { int classification = _fpclass(x); return classification == _FPCLASS_NN || classification == _FPCLASS_PN; } #elif defined(ANDROID) && defined(_STLPORT_VERSION) // On Android, when using the STLPort, the C++ isnan and isnormal functions // are defined as macros. 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. 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 // 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_