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 37namespace ceres { 38namespace internal { 39 40// Compile time ternary on types. 41template<bool kCondition, typename kTrueType, typename kFalseType> 42struct Ternary { 43 typedef kTrueType type; 44}; 45template<typename kTrueType, typename kFalseType> 46struct Ternary<false, kTrueType, kFalseType> { 47 typedef kFalseType type; 48}; 49 50#define CERES_INTSIZE(TYPE) \ 51 typename Ternary<sizeof(TYPE) * 8 == kBits, TYPE, 52 53template<int kBits> 54struct 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 65template<int kBits> 66struct 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 79typedef Integer< 8>::type int8; 80typedef Integer<32>::type int32; 81typedef Integer<64>::type int64; 82 83typedef UnsignedInteger< 8>::type uint8; 84typedef UnsignedInteger<16>::type uint16; 85typedef UnsignedInteger<32>::type uint32; 86typedef UnsignedInteger<64>::type uint64; 87 88} // namespace internal 89} // namespace ceres 90 91#endif // CERES_INTERNAL_INTEGRAL_TYPES_H_ 92