diff options
Diffstat (limited to 'internal/ceres/integral_types.h')
| -rw-r--r-- | internal/ceres/integral_types.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/internal/ceres/integral_types.h b/internal/ceres/integral_types.h new file mode 100644 index 0000000..01e0493 --- /dev/null +++ b/internal/ceres/integral_types.h @@ -0,0 +1,92 @@ +// Ceres Solver - A fast non-linear least squares minimizer +// Copyright 2010, 2011, 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 typedefs for various fixed-size integers. Uses template +// metaprogramming instead of fragile compiler defines. + +#ifndef CERES_INTERNAL_INTEGRAL_TYPES_H_ +#define CERES_INTERNAL_INTEGRAL_TYPES_H_ + +namespace ceres { +namespace internal { + +// Compile time ternary on types. +template<bool kCondition, typename kTrueType, typename kFalseType> +struct Ternary { + typedef kTrueType type; +}; +template<typename kTrueType, typename kFalseType> +struct Ternary<false, kTrueType, kFalseType> { + typedef kFalseType type; +}; + +#define CERES_INTSIZE(TYPE) \ + typename Ternary<sizeof(TYPE) * 8 == kBits, TYPE, + +template<int kBits> +struct Integer { + typedef + CERES_INTSIZE(char) + CERES_INTSIZE(short) + CERES_INTSIZE(int) + CERES_INTSIZE(long int) + CERES_INTSIZE(long long) + void>::type >::type >::type >::type >::type + type; +}; + +template<int kBits> +struct UnsignedInteger { + typedef + CERES_INTSIZE(unsigned char) + CERES_INTSIZE(unsigned short) + CERES_INTSIZE(unsigned int) + CERES_INTSIZE(unsigned long int) + CERES_INTSIZE(unsigned long long) + void>::type >::type >::type >::type >::type + type; +}; + +#undef CERES_INTSIZE + +typedef Integer< 8>::type int8; +typedef Integer<16>::type int16; +typedef Integer<32>::type int32; +typedef Integer<64>::type int64; + +typedef UnsignedInteger< 8>::type uint8; +typedef UnsignedInteger<16>::type uint16; +typedef UnsignedInteger<32>::type uint32; +typedef UnsignedInteger<64>::type uint64; + +} // namespace internal +} // namespace ceres + +#endif // CERES_INTERNAL_INTEGRAL_TYPES_H_ |