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// Ceres Solver - A fast non-linear least squares minimizer
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// Copyright 2010, 2011, 2012 Google Inc. All rights reserved.
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// http://code.google.com/p/ceres-solver/
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of Google Inc. nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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// Author: kenton@google.com (Kenton Varda)
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// ManualConstructor statically-allocates space in which to store some
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// object, but does not initialize it. You can then call the constructor
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// and destructor for the object yourself as you see fit. This is useful
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// for memory management optimizations, where you want to initialize and
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// destroy an object multiple times but only allocate it once.
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// (When I say ManualConstructor statically allocates space, I mean that
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// the ManualConstructor object itself is forced to be the right size.)
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#ifndef CERES_PUBLIC_INTERNAL_MANUAL_CONSTRUCTOR_H_
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#define CERES_PUBLIC_INTERNAL_MANUAL_CONSTRUCTOR_H_
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// ------- Define ALIGNED_CHAR_ARRAY --------------------------------
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#ifndef ALIGNED_CHAR_ARRAY
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// Because MSVC and older GCCs require that the argument to their alignment
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// construct to be a literal constant integer, we use a template instantiated
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// at all the possible powers of two.
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template<int alignment, int size> struct AlignType { };
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template<int size> struct AlignType<0, size> { typedef char result[size]; };
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#define BASE_PORT_H_ALIGN_ATTRIBUTE(X) __declspec(align(X))
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#define BASE_PORT_H_ALIGN_OF(T) __alignof(T)
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#elif defined(__GNUC__)
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#define BASE_PORT_H_ALIGN_ATTRIBUTE(X) __attribute__((aligned(X)))
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#define BASE_PORT_H_ALIGN_OF(T) __alignof__(T)
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#if defined(BASE_PORT_H_ALIGN_ATTRIBUTE)
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#define BASE_PORT_H_ALIGNTYPE_TEMPLATE(X) \
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template<int size> struct AlignType<X, size> { \
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typedef BASE_PORT_H_ALIGN_ATTRIBUTE(X) char result[size]; \
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BASE_PORT_H_ALIGNTYPE_TEMPLATE(1);
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BASE_PORT_H_ALIGNTYPE_TEMPLATE(2);
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BASE_PORT_H_ALIGNTYPE_TEMPLATE(4);
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BASE_PORT_H_ALIGNTYPE_TEMPLATE(8);
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BASE_PORT_H_ALIGNTYPE_TEMPLATE(16);
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BASE_PORT_H_ALIGNTYPE_TEMPLATE(32);
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BASE_PORT_H_ALIGNTYPE_TEMPLATE(64);
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BASE_PORT_H_ALIGNTYPE_TEMPLATE(128);
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BASE_PORT_H_ALIGNTYPE_TEMPLATE(256);
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BASE_PORT_H_ALIGNTYPE_TEMPLATE(512);
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BASE_PORT_H_ALIGNTYPE_TEMPLATE(1024);
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BASE_PORT_H_ALIGNTYPE_TEMPLATE(2048);
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BASE_PORT_H_ALIGNTYPE_TEMPLATE(4096);
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BASE_PORT_H_ALIGNTYPE_TEMPLATE(8192);
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// Any larger and MSVC++ will complain.
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#define ALIGNED_CHAR_ARRAY(T, Size) \
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typename AlignType<BASE_PORT_H_ALIGN_OF(T), sizeof(T) * Size>::result
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#undef BASE_PORT_H_ALIGNTYPE_TEMPLATE
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#undef BASE_PORT_H_ALIGN_ATTRIBUTE
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#else // defined(BASE_PORT_H_ALIGN_ATTRIBUTE)
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#define ALIGNED_CHAR_ARRAY you_must_define_ALIGNED_CHAR_ARRAY_for_your_compiler
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#endif // defined(BASE_PORT_H_ALIGN_ATTRIBUTE)
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#undef BASE_PORT_H_ALIGNTYPE_TEMPLATE
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#undef BASE_PORT_H_ALIGN_ATTRIBUTE
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#endif // ALIGNED_CHAR_ARRAY
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template <typename Type>
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class ManualConstructor {
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// No constructor or destructor because one of the most useful uses of
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// this class is as part of a union, and members of a union cannot have
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// constructors or destructors. And, anyway, the whole point of this
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// class is to bypass these.
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return reinterpret_cast<Type*>(space_);
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inline const Type* get() const {
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return reinterpret_cast<const Type*>(space_);
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inline Type* operator->() { return get(); }
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inline const Type* operator->() const { return get(); }
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inline Type& operator*() { return *get(); }
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inline const Type& operator*() const { return *get(); }
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// You can pass up to four constructor arguments as arguments of Init().
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template <typename T1>
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inline void Init(const T1& p1) {
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new(space_) Type(p1);
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template <typename T1, typename T2>
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inline void Init(const T1& p1, const T2& p2) {
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new(space_) Type(p1, p2);
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template <typename T1, typename T2, typename T3>
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inline void Init(const T1& p1, const T2& p2, const T3& p3) {
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new(space_) Type(p1, p2, p3);
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template <typename T1, typename T2, typename T3, typename T4>
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inline void Init(const T1& p1, const T2& p2, const T3& p3, const T4& p4) {
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new(space_) Type(p1, p2, p3, p4);
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template <typename T1, typename T2, typename T3, typename T4, typename T5>
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inline void Init(const T1& p1, const T2& p2, const T3& p3, const T4& p4,
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new(space_) Type(p1, p2, p3, p4, p5);
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template <typename T1, typename T2, typename T3, typename T4, typename T5,
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inline void Init(const T1& p1, const T2& p2, const T3& p3, const T4& p4,
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const T5& p5, const T6& p6) {
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new(space_) Type(p1, p2, p3, p4, p5, p6);
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template <typename T1, typename T2, typename T3, typename T4, typename T5,
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typename T6, typename T7>
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inline void Init(const T1& p1, const T2& p2, const T3& p3, const T4& p4,
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const T5& p5, const T6& p6, const T7& p7) {
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new(space_) Type(p1, p2, p3, p4, p5, p6, p7);
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template <typename T1, typename T2, typename T3, typename T4, typename T5,
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typename T6, typename T7, typename T8>
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inline void Init(const T1& p1, const T2& p2, const T3& p3, const T4& p4,
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const T5& p5, const T6& p6, const T7& p7, const T8& p8) {
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new(space_) Type(p1, p2, p3, p4, p5, p6, p7, p8);
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template <typename T1, typename T2, typename T3, typename T4, typename T5,
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typename T6, typename T7, typename T8, typename T9>
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inline void Init(const T1& p1, const T2& p2, const T3& p3, const T4& p4,
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const T5& p5, const T6& p6, const T7& p7, const T8& p8,
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new(space_) Type(p1, p2, p3, p4, p5, p6, p7, p8, p9);
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template <typename T1, typename T2, typename T3, typename T4, typename T5,
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typename T6, typename T7, typename T8, typename T9, typename T10>
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inline void Init(const T1& p1, const T2& p2, const T3& p3, const T4& p4,
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const T5& p5, const T6& p6, const T7& p7, const T8& p8,
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const T9& p9, const T10& p10) {
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new(space_) Type(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10);
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template <typename T1, typename T2, typename T3, typename T4, typename T5,
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typename T6, typename T7, typename T8, typename T9, typename T10,
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inline void Init(const T1& p1, const T2& p2, const T3& p3, const T4& p4,
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const T5& p5, const T6& p6, const T7& p7, const T8& p8,
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const T9& p9, const T10& p10, const T11& p11) {
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new(space_) Type(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11);
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inline void Destroy() {
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ALIGNED_CHAR_ARRAY(Type, 1) space_;
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#undef ALIGNED_CHAR_ARRAY
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} // namespace internal
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#endif // CERES_PUBLIC_INTERNAL_MANUAL_CONSTRUCTOR_H_