| Keir Mierle | 8ebb073 | 2012-04-30 23:09:08 -0700 | [diff] [blame] | 1 | // Ceres Solver - A fast non-linear least squares minimizer |
| 2 | // Copyright 2010, 2011, 2012 Google Inc. All rights reserved. |
| 3 | // http://code.google.com/p/ceres-solver/ |
| 4 | // |
| 5 | // Redistribution and use in source and binary forms, with or without |
| 6 | // modification, are permitted provided that the following conditions are met: |
| 7 | // |
| 8 | // * Redistributions of source code must retain the above copyright notice, |
| 9 | // this list of conditions and the following disclaimer. |
| 10 | // * Redistributions in binary form must reproduce the above copyright notice, |
| 11 | // this list of conditions and the following disclaimer in the documentation |
| 12 | // and/or other materials provided with the distribution. |
| 13 | // * Neither the name of Google Inc. nor the names of its contributors may be |
| 14 | // used to endorse or promote products derived from this software without |
| 15 | // specific prior written permission. |
| 16 | // |
| 17 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 18 | // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 21 | // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 22 | // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 23 | // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 24 | // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 25 | // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 26 | // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 27 | // POSSIBILITY OF SUCH DAMAGE. |
| 28 | // |
| 29 | // Author: keir@google.com (Keir Mierle) |
| 30 | // |
| 31 | // Portable typedefs for various fixed-size integers. Uses template |
| 32 | // metaprogramming instead of fragile compiler defines. |
| 33 | |
| 34 | #ifndef CERES_INTERNAL_INTEGRAL_TYPES_H_ |
| 35 | #define CERES_INTERNAL_INTEGRAL_TYPES_H_ |
| 36 | |
| 37 | namespace ceres { |
| 38 | namespace internal { |
| 39 | |
| 40 | // Compile time ternary on types. |
| 41 | template<bool kCondition, typename kTrueType, typename kFalseType> |
| 42 | struct Ternary { |
| 43 | typedef kTrueType type; |
| 44 | }; |
| 45 | template<typename kTrueType, typename kFalseType> |
| 46 | struct Ternary<false, kTrueType, kFalseType> { |
| 47 | typedef kFalseType type; |
| 48 | }; |
| 49 | |
| 50 | #define CERES_INTSIZE(TYPE) \ |
| 51 | typename Ternary<sizeof(TYPE) * 8 == kBits, TYPE, |
| 52 | |
| 53 | template<int kBits> |
| 54 | struct Integer { |
| 55 | typedef |
| 56 | CERES_INTSIZE(char) |
| 57 | CERES_INTSIZE(short) |
| 58 | CERES_INTSIZE(int) |
| 59 | CERES_INTSIZE(long int) |
| 60 | CERES_INTSIZE(long long) |
| 61 | void>::type >::type >::type >::type >::type |
| 62 | type; |
| 63 | }; |
| 64 | |
| 65 | template<int kBits> |
| 66 | struct UnsignedInteger { |
| 67 | typedef |
| 68 | CERES_INTSIZE(unsigned char) |
| 69 | CERES_INTSIZE(unsigned short) |
| 70 | CERES_INTSIZE(unsigned int) |
| 71 | CERES_INTSIZE(unsigned long int) |
| 72 | CERES_INTSIZE(unsigned long long) |
| 73 | void>::type >::type >::type >::type >::type |
| 74 | type; |
| 75 | }; |
| 76 | |
| 77 | #undef CERES_INTSIZE |
| 78 | |
| 79 | typedef Integer< 8>::type int8; |
| 80 | typedef Integer<16>::type int16; |
| 81 | typedef Integer<32>::type int32; |
| 82 | typedef Integer<64>::type int64; |
| 83 | |
| 84 | typedef UnsignedInteger< 8>::type uint8; |
| 85 | typedef UnsignedInteger<16>::type uint16; |
| 86 | typedef UnsignedInteger<32>::type uint32; |
| 87 | typedef UnsignedInteger<64>::type uint64; |
| 88 | |
| 89 | } // namespace internal |
| 90 | } // namespace ceres |
| 91 | |
| 92 | #endif // CERES_INTERNAL_INTEGRAL_TYPES_H_ |
