/*
 *  File:       FixVec.h
 *  Summary:    Fixed size vector class that asserts if you do something bad.
 *  Written by: Jesse Jones
 *
 *  Change History (most recent first):    
 *
 *         <2>     7/29/00    JDJ        Added a variable argument ctor.
 *         <1>     6/16/00    JDJ        Created
 */

#ifndef FIXVEC_H
#define FIXVEC_H

#include <cstdarg>
#include <cstring>

#include "debug.h"


// ==========================================================================
//    class FixedVector
// ==========================================================================

template <class TYPE, int SIZE> class FixedVector
{

//-----------------------------------
//    Types
//
public:
    typedef TYPE            value_type;
    typedef TYPE&           reference;
    typedef const TYPE&     const_reference;
    typedef TYPE*           pointer;
    typedef const TYPE*     const_pointer;

    typedef unsigned long   size_type;
    typedef long            difference_type;
    
    typedef TYPE*           iterator;
    typedef const TYPE*     const_iterator;

//-----------------------------------
//    Initialization/Destruction
//
public:
    ~FixedVector()                           {}

    FixedVector()                            {}

    FixedVector(TYPE def) : mData()
    {
        init(def);
    }

    FixedVector(TYPE value0, TYPE value1, ...);
    // Allows for something resembling C array initialization, eg
    // instead of "int a[3] = {0, 1, 2}" you'd use "FixedVector<int, 3>
    // a(0, 1, 2)". Note that there must be SIZE arguments.

// public:
//                        FixedVector(const FixedVector& rhs);
//
//            FixedVector& operator=(const FixedVector& rhs);

//-----------------------------------
//    API
//
public:
// ----- Size -----
    bool        empty() const                          {return SIZE == 0;}
    size_t      size() const                           {return SIZE;}

// ----- Access -----
    TYPE&       operator[](unsigned long index)        {ASSERT(index < SIZE); return mData[index];}
    const TYPE& operator[](unsigned long index) const  {ASSERT(index < SIZE); return mData[index];}
        
    TYPE&       front()                                {ASSERT(SIZE > 0); return mData[0];}
    const TYPE& front() const                          {ASSERT(SIZE > 0); return mData[0];}

    TYPE&       back()                                 {ASSERT(SIZE > 0); return mData[SIZE - 1];}
    const TYPE& back() const                           {ASSERT(SIZE > 0); return mData[SIZE - 1];}
    
    TYPE*       buffer()                               {return mData;}
    const TYPE* buffer() const                         {return mData;}

// ----- Iterating -----
    iterator                 begin()                   {return mData;}
    const_iterator           begin() const             {return mData;}

    iterator                 end()                     {return this->begin() + this->size();}
    const_iterator           end() const               {return this->begin() + this->size();}

    void                     init(TYPE def);

//-----------------------------------
//    Member Data
//
protected:
    TYPE    mData[SIZE];
};


// ==========================================================================
//    Outlined Methods
// ==========================================================================
template <class TYPE, int SIZE>
FixedVector<TYPE, SIZE>::FixedVector(TYPE value0, TYPE value1, ...)
{
    mData[0] = value0;
    mData[1] = value1;

    va_list ap;
    va_start(ap, value1);   // second argument is last fixed parameter

    for (int index = 2; index < SIZE; index++)
    {
        TYPE value = va_arg(ap, TYPE);
        mData[index] = value;
    }

    va_end(ap);
}

template <class TYPE, int SIZE>
void FixedVector<TYPE, SIZE>::init(TYPE def)
{
    for (int i = 0; i < SIZE; ++i)
        mData[i] = def;
}

#endif    // FIXVEC_H