vector

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/*      Copyright (C) 2004 Garrett A. Kajmowicz

        This file is part of the uClibc++ Library.

        This library is free software; you can redistribute it and/or
        modify it under the terms of the GNU Lesser General Public
        License as published by the Free Software Foundation; either
        version 2.1 of the License, or (at your option) any later version.

        This library is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        Lesser General Public License for more details.

        You should have received a copy of the GNU Lesser General Public
        License along with this library; if not, write to the Free Software
        Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

#include "basic_definitions"
#include "memory"
#include "iterator"
#include "func_exception"
#include "algorithm"
#include "type_traits"

#pragma warning(push)
#pragma warning(disable:4127)

#ifndef __STD_HEADER_VECTOR
#define __STD_HEADER_VECTOR

namespace std{

        template <class T, class Allocator = allocator<T> > class vector;
        template <class T, class Allocator> bool operator==(const vector<T,Allocator>& x, const vector<T,Allocator>& y);
        template <class T, class Allocator> bool operator< (const vector<T,Allocator>& x, const vector<T,Allocator>& y);
        template <class T, class Allocator> bool operator!=(const vector<T,Allocator>& x, const vector<T,Allocator>& y);
        template <class T, class Allocator> bool operator> (const vector<T,Allocator>& x, const vector<T,Allocator>& y);
        template <class T, class Allocator> bool operator>=(const vector<T,Allocator>& x, const vector<T,Allocator>& y);
        template <class T, class Allocator> bool operator<=(const vector<T,Allocator>& x, const vector<T,Allocator>& y);
        template <class T, class Allocator> void swap(vector<T,Allocator>& x, vector<T,Allocator>& y);

        template <class T, class Allocator> class _UCXXEXPORT vector {
        private:
                enum {ispod=isPOD<T>::is};
        public:

                typedef typename Allocator::reference reference;
                typedef typename Allocator::const_reference const_reference;
                typedef typename Allocator::size_type size_type;
                typedef typename Allocator::difference_type difference_type;
                typedef typename Allocator::pointer pointer;
                typedef typename Allocator::const_pointer const_pointer;

                typedef T* iterator;
                typedef const T* const_iterator;
                typedef T value_type;
                typedef Allocator allocator_type;
                typedef std::reverse_iterator<iterator> reverse_iterator;
                typedef std::reverse_iterator<const_iterator> const_reverse_iterator;

                explicit _UCXXEXPORT vector(): data(0), //defaultValue(T()),
                        data_size(__UCLIBCXX_STL_BUFFER_SIZE__), elements(0), a(Allocator())
                {
                        data = a.allocate(data_size);
                }

                explicit _UCXXEXPORT vector(const Allocator& al): data(0), //defaultValue(T()),
                        data_size(__UCLIBCXX_STL_BUFFER_SIZE__), elements(0), a(al)
                {
                        data = a.allocate(data_size);
                }

                explicit _UCXXEXPORT vector(size_type n, const T& value = T(), const Allocator& al= Allocator()) :
                        data(0),
                        data_size(0), elements(0), a(al)
                {
                        data_size = n + __UCLIBCXX_STL_BUFFER_SIZE__;
                        data = a.allocate(data_size);

                                resize(n, value);
                }

                template <class InputIterator> _UCXXEXPORT
                        vector(InputIterator first, InputIterator last, const Allocator& al = Allocator()):
                        data(0), data_size(__UCLIBCXX_STL_BUFFER_SIZE__), elements(0), a(al)
                {
                        data = a.allocate(data_size);
                        assign(first, last);
                }

                _UCXXEXPORT vector(const vector<T,Allocator>& x){
                        a = x.a;

                        elements  = x.elements;
                        data_size = elements + __UCLIBCXX_STL_BUFFER_SIZE__;
                        data = a.allocate(data_size);

                        if (ispod)
                          memcpy(data,x.data,elements*sizeof(T));
                        else
                          for(size_type i = 0; i < elements; i++){
                                  a.construct(data+i, x.data[i]);
                          }
                }

                _UCXXEXPORT ~vector();  //Below

                _UCXXEXPORT vector<T,Allocator>& operator=(const vector<T,Allocator>& x){
                        if(&x == this){
                                return *this;
                        }

                        reserve(x.elements);    //Make sure that we have enough actual memory


                        //Copy as many elements as possible

                        size_t minElements = elements;
                        if(minElements > x.elements){
                                minElements = x.elements;
                        }
                        if (ispod)
                          memcpy(data,x.data,minElements*sizeof(T));
                        else
                          for(size_t i = 0; i < minElements; ++i){
                                  data[i] = x.data[i];
                          }

                        //If we need to add new elements
                        if(elements < x.elements){
                                for(size_t i = elements; i< x.elements; ++i){
                                        a.construct(data+i, x.data[i]);
                                        ++elements;
                                }
                        }

                        if(elements > x.elements){
                                downsize(x.elements);
                        }

                        return *this;
                }

                template <class InputIterator> _UCXXEXPORT void assign(InputIterator first, InputIterator last){
                        clear();
                        insert(begin(), first, last);
                }

                template <class Size, class U> _UCXXEXPORT void assign(Size n, const U& u = U()){
                        clear();
                        resize(n, u);
                }

                inline allocator_type get_allocator() const{
                        return a;
                }

                inline iterator begin(){
                        return data;
                }

                inline const_iterator begin() const{
                        return data;
                }

                inline iterator end(){
                        return (data + elements);
                }

                inline const_iterator end() const{
                        return (data + elements);
                }

                inline reverse_iterator rbegin(){
                        return reverse_iterator(end());
                }

                inline const_reverse_iterator rbegin() const{
                        return const_reverse_iterator(end());
                }

                inline reverse_iterator rend(){
                        return reverse_iterator(begin());
                }

                inline const_reverse_iterator rend() const{
                        return const_reverse_iterator(begin());
                }

                inline size_type size() const{
                        return elements;
                }

                _UCXXEXPORT size_type max_size() const{
                        return ((size_type)(-1)) / sizeof(T);
                }

                void downsize(size_type sz);
                void resize(size_type sz, const T & c=T());

                inline size_type capacity() const{
                        return data_size;
                }

                inline bool empty() const{
                        return (size() == 0);
                }

                void reserve(size_type n);

                inline reference operator[](size_type n){
                        return data[n];
                }

                inline const_reference operator[](size_type n) const{
                        return data[n];
                }

                _UCXXEXPORT const_reference at(size_type n) const{
                        if(n >= elements){
                                __throw_out_of_range("Invalid subscript");
                        }
                        return data[n];
                }

                _UCXXEXPORT reference at(size_type n){
                        if(n >= elements){
                                __throw_out_of_range("Invalid subscript");
                        }
                        return data[n];
                }

                inline reference front(){
                        return data[0];
                }

                inline const_reference front() const{
                        return data[0];
                }

                inline reference back(){
                        return data[ size() - 1];
                }

                inline const_reference back() const{
                        return data[ size() - 1 ];
                }

                inline void push_back(const T& x){
                        resize( size() + 1, x);
                }

                inline void pop_back(){
                        downsize(size() - 1);
                }

                _UCXXEXPORT iterator insert(iterator position, const T& x = T()){
                        size_type index = position - data;
                        resize(size() + 1, x);
                        if (ispod){
                          if (elements-1>index)
                            memmove(data+index+1,data+(index+1)-1,((elements-1)-index)*sizeof(T));
                        }
                        else
                          for(size_type i = elements - 1; i > index; --i){
                                 data[i] = data[i-1];
                          }
                        data[index] = x;
                        return (data + index);
                }

                _UCXXEXPORT void _insert_fill(iterator position, size_type n, const T & x){
                        size_type index = position - data;
                        resize(size() + n, x);

                        for(size_type i = elements -1; (i > (index+n-1)); --i){
                                data[i] = data[i-n];