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 (at) 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_ 93
