List.h

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#ifndef SimTK_SimTKCOMMON_LIST_H_
#define SimTK_SimTKCOMMON_LIST_H_

/* -------------------------------------------------------------------------- *
 *                      SimTK Core: SimTKcommon                               *
 * -------------------------------------------------------------------------- *
 * This is part of the SimTK Core biosimulation toolkit originating from      *
 * Simbios, the NIH National Center for Physics-Based Simulation of           *
 * Biological Structures at Stanford, funded under the NIH Roadmap for        *
 * Medical Research, grant U54 GM072970. See https://simtk.org.               *
 *                                                                            *
 * Portions copyright (c) 2005-6 Stanford University and the Authors.         *
 * Authors: Michael Sherman                                                   *
 * Contributors:                                                              *
 *                                                                            *
 * Permission is hereby granted, free of charge, to any person obtaining a    *
 * copy of this software and associated documentation files (the "Software"), *
 * to deal in the Software without restriction, including without limitation  *
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,   *
 * and/or sell copies of the Software, and to permit persons to whom the      *
 * Software is furnished to do so, subject to the following conditions:       *
 *                                                                            *
 * The above copyright notice and this permission notice shall be included in *
 * all copies or substantial portions of the Software.                        *
 *                                                                            *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,   *
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL    *
 * THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,    *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR      *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE  *
 * USE OR OTHER DEALINGS IN THE SOFTWARE.                                     *
 * -------------------------------------------------------------------------- */

#include "SimTKcommon/internal/common.h"
#include "SimTKcommon/internal/Array.h"
#include "SimTKcommon/internal/Concretize.h"

#include <complex>
#include <cassert>

namespace SimTK {
     
template <class T> class List;
template <class T> class ListView; 

template <class T> class ListBase : public ArrayBase< Concretize<T> > {
    typedef Concretize<T> Element;
    typedef ArrayBase<Element> Base;
public:
    ListBase() { }
    ListBase(int n) : Base(n) {assert(n>=0);}

    // default copy, assignment, destructor made explicit here for convenient debugging
    ListBase(const ListBase& lb) : Base(lb) { }
    ~ListBase() { }
    ListBase& operator=(const ListBase& lb) {Base::operator=(lb); return *this;}
    
    // These make copies of the supplied objects    
    ListBase(int n, const T& initVal) : Base(n,Element(&initVal)) { }
    ListBase(int n, const T* initVal) : Base(n,Element(initVal))  { }
    ListBase(int n, const T* const* initVals) : Base(n) {
        for (int i=0; i<n; ++i) Base::operator[](i) = *initVals[i];
    }

    // This steals all the space and zeroes out the passed-in array of pointers.        
    ListBase(int n, T** pp) : Base(n) {
        for (int i=0;i<n;++i) Base::operator[](i).replace(&pp[i]);
    }
    
    // Sub-ListBase constructors, read only and writable.
    // These share space with the original ListBase.
    ListBase(const ListBase& l, int offset, int length) : Base(l,offset,length) { }
    ListBase(ListBase&       l, int offset, int length) : Base(l,offset,length) { }
    
    Element& operator[](int i)       {return Base::operator[](i);}
    const T& operator[](int i) const {return Base::operator[](i).getRef();}    
        
    void push_back(const T& x)   {Base::push_back(Element(&x));} // copies x
    void push_back(T* p)         {Base::push_back(Element(p)); } // steals p
    void push_back(T*& pr)       {Base::push_back(Element(pr));} // steals p and clears it
    ListBase& operator+=(const T& x) {push_back(x); }
    ListBase& operator+=(T*  p)      {push_back(p); }
    ListBase& operator+=(T*& pr)     {push_back(pr);}    
        
    bool isEmpty(int i) const {return Base::operator[](i).isEmpty();}
};

// Partial specialization for pointers -- these are just Arrays of pointers
template <class T> class ListBase<T*>: public ArrayBase<T*> {
    typedef T* Element;
    typedef ArrayBase<Element> Base;
public:
    ListBase() { }
    ListBase(int n) : Base(n) { }
    ListBase(int n, Element initVal) : Base(n,initVal) { }     
    ListBase(int n, const Element* initVals) : Base(n,initVals) { }
    ListBase(const ListBase& l, int offset, int length) : Base(l,offset,length) { }
    ListBase(ListBase&       l, int offset, int length) : Base(l,offset,length) { }
    
    // default copy, assignment, destructor made explicit here for convenient debugging
    ListBase(const ListBase& lb) : Base(lb) { }
    ~ListBase() { }
    ListBase& operator=(const ListBase& lb) { Base::operator=(lb); return *this; }
 
    // inherit most operators and methods from Base   
    
    ListBase& operator+=(Element x) { Base::operator+=(x); return *this; }
    bool isEmpty(int) const { return false; }
};

// ListBase template specializations for known concrete objects
#define SimTK_LIST_SPECIALIZE(T)                                    \
template <> class ListBase< T > : public ArrayBase< T > {           \
    typedef ArrayBase< T > Base;                                    \
public:                                                             \
    ListBase() { }                                                  \
    ListBase(int n) : Base(n) { }                                \
    ListBase(int n, const T& initVal) : Base(n,initVal) { }      \
    ListBase(int n, const T* initVals): Base(n,initVals) { }     \
    ListBase(const ListBase& l, int offset, int length) : Base(l,offset,length) { }   \
    ListBase(ListBase&       l, int offset, int length) : Base(l,offset,length) { }   \
    /* default copy, assignment, destructor; inherit most operators & methods */            \
    ListBase& operator+=(const T& x) { Base::operator+=(x); return *this; } \
    bool isEmpty(int) const { return false; }                            \
};

// Built-in types
SimTK_LIST_SPECIALIZE(bool);            SimTK_LIST_SPECIALIZE(signed char); 
SimTK_LIST_SPECIALIZE(char);            SimTK_LIST_SPECIALIZE(unsigned char);
SimTK_LIST_SPECIALIZE(short);           SimTK_LIST_SPECIALIZE(int); 
SimTK_LIST_SPECIALIZE(long); 
SimTK_LIST_SPECIALIZE(unsigned short);  SimTK_LIST_SPECIALIZE(unsigned int); 
SimTK_LIST_SPECIALIZE(unsigned long);
SimTK_LIST_SPECIALIZE(float);           SimTK_LIST_SPECIALIZE(double); 
SimTK_LIST_SPECIALIZE(long double);
SimTK_LIST_SPECIALIZE(std::complex<float>);
SimTK_LIST_SPECIALIZE(std::complex<double>); 
SimTK_LIST_SPECIALIZE(std::complex<long double>);


template <class T> class ListView : public ListBase<T> {
    typedef ListBase<T> Base;
public:
    // no default constructor
    ListView(const ListView& v) : Base(v, 0, v.size()) { } // an identical view
    explicit ListView(const Base& l) : Base(l, 0, l.size()) { }  // a view of the whole thing
    ~ListView() { } // convenient for debugging
       
    // Sub-array constructors, read only and writable, and their operator equivalents
    ListView(const Base& a, int offset, int length) : Base(a,offset,length) { }
    ListView(Base&       a, int offset, int length) : Base(a,offset,length) { }
    ListView operator()(int offset, int length) const {return ListView(*this, offset, length);}
    ListView operator()(int offset, int length)       {return ListView(*this, offset, length);} 
        
    // Shallow assignment only (ListBase understands)
    ListView& operator=(const ListView& v) {Base::operator=(v); return *this;}
    ListView& operator=(const Base&     b) {Base::operator=(b); return *this;}
    
    // Conversions
    operator const List<T>&() const {return *reinterpret_cast<const List<T>*>(this);}
    operator List<T>&()             {return *reinterpret_cast<List<T>*>(this);}
private:
    // NO DATA MEMBERS ALLOWED
    ListView() { assert(false); } // default construction not allowed
};

template <class T> class List : public ListBase<T> {
    typedef ListBase<T> Base;
public:
    List() : Base() { }
    explicit List(int n) : Base(n) { }
    ~List() { } // convenient for debugging
    
    // default copy, assignment, destructor (these will be "deep" copies)
    
    // These allocate new space and fill it with copies of the supplied objects    
    List(int n, const T& initVal) : Base(n,initVal) { }
    List(int n, const T* initVal) : Base(n,initVal)  { }
    List(int n, const T* const* initVals) : Base(n,initVals) { }

    // This allocates a new List but steals the initializing objects rather
    // than copying them. For safety it zeroes out the passed-in array of pointers.        
    List(int n, T** pp) : Base(n,pp) { }
    
    // Sub-list constructors, read only and writable, and their operator equivalents.
    // These share space with the original List.
    List(const List& l, int offset, int length) : Base(l,offset,length) { }
    List(List&       l, int offset, int length) : Base(l,offset,length) { }
    
    const ListView<T> operator()(int offset, int length) const 
        { return ListView<T>(*this, offset, length); }
    ListView<T>       operator()(int offset, int length)       
        { return ListView<T>(*this, offset, length); }    
        
    List& operator+=(const T& x) { Base::operator+=(x); return *this; }
    List& operator+=(T*  p)      { Base::operator+=(p); return *this; }
    List& operator+=(T*& x)      { Base::operator+=(x); return *this; }   
        
    // Conversions
    operator const ListView<T>&() const 
        { return *reinterpret_cast<const ListView<T>*>(this); }
    operator ListView<T>&()             
        { return *reinterpret_cast<ListView<T>*>(this); }
private:
    // NO DATA MEMBERS ALLOWED
};

template <class T> inline int
findFirstOf(const List<T>& l, const T& test) {
    for (int i=0; i<l.size(); ++i)
        if (l[i] == test) return i;
    return -1;
} 

template <class T> inline int
findFirstOf(const ListView<T>& lv, const T& test) {
    return findFirstOf((const List<T>&)lv, test);
}


template <class T> inline Array<int>
findAllOf(const List<T>& l, const T& test) {
    Array<int> matches;
    for (int i=0; i<l.size(); ++i)
        if (l[i] == test) matches.push_back(i);
    return matches;
} 

template <class T> inline Array<int>
findAllOf(const ListView<T>& lv, const T& test) {
    return findAllOf((const List<T>&)lv, test);
}

template <class T> inline bool
contains(const List<T>& l, const T& test) {
    return findFirstOf(l,test) != -1;
}

template <class T> inline bool
contains(const ListView<T>& lv, const T& test) {
    return contains((const List<T>&)lv, test);
}

} // namespace SimTK


#endif // SimTK_SimTKCOMMON_LIST_H_

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