vector

/*	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>
#include <initializer_list>

#ifndef __STD_HEADER_VECTOR
#define __STD_HEADER_VECTOR

#pragma GCC visibility push(default)

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 {
	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(const Allocator& al= Allocator()): 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);

			for(size_type i = 0; i < elements; i++){
				a.construct(data+i, x.data[i]);
			}	
		}
#if __cplusplus >= 201103L
		_UCXXEXPORT vector(initializer_list<T> x,const Allocator& al= Allocator()):
			a(al)
		{ 

			elements  = x.size();
			data_size = elements + __UCLIBCXX_STL_BUFFER_SIZE__;
			data = a.allocate(data_size);
			size_type i = 0;
			for( auto xx : x )
				a.construct(data + i++, xx);
		}
#endif
		_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;
			}
			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);
			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];
			}
			for(size_type i = 0; i < n; i++){
				data[i + index]  = x;
			}
		}

		template <class InputIterator> _UCXXEXPORT 
			void _insert_from_iterator(iterator position, InputIterator first, InputIterator last)
		{
			T temp;
			while(first !=last){
				temp = *first;
				position = insert(position, temp);
				++position;
				++first;
			}
		}

		template <class InputIterator>
			inline void _dispatch_insert(iterator position, InputIterator first, InputIterator last, __true_type)
		{
			_insert_fill(position, first, last);
		}

		template <class InputIterator>
			inline void _dispatch_insert(iterator position, InputIterator first, InputIterator last, __false_type)
		{
				_insert_from_iterator(position, first, last);
		}

		inline void insert(iterator position, size_type n, const T& x ){
			_insert_fill(position, n, x);
		}

		template <class InputIterator> inline void insert(iterator position, InputIterator first, InputIterator last){
			typedef typename __is_integer<InputIterator>::value __some_type;
			_dispatch_insert(position, first, last, __some_type());
		}

		_UCXXEXPORT iterator erase(iterator position){
			size_type index = position - data;
			for(size_type i = index; i < (elements - 1); ++i){
				data[i] = data[i+1];
			}
			downsize(size() - 1);
			return (data + index);
		}

		_UCXXEXPORT iterator erase(iterator first, iterator last){
			size_type index = first - data;
			size_type width = last - first;
			for(size_type i = index; i < (elements - width) ;++i){
				data[i] = data[i+width];
			}
			downsize(size() - width);
			return (data + index);
		}

		_UCXXEXPORT void swap(vector<T,Allocator>& v){
			if(this == &v){		//Avoid dv.swap(v)
				return;
			}
			T* ptr;
			size_type temp;

			//Swap pointers first
			ptr = data;
			data = v.data;
			v.data  = ptr;

			//Swap element counts
			temp = elements;
			elements = v.elements;
			v.elements = temp;

			//Swap data size
			temp = data_size;
			data_size = v.data_size;
			v.data_size = temp;
		}

		_UCXXEXPORT void clear(){
			downsize(0);
		}

	protected:
		T* data;
		size_type data_size;
		size_type elements;
		Allocator a;
	};



	//Here go template instantiations

	template<class T, class Allocator> _UCXXEXPORT vector<T, Allocator>::~vector(){
		for(size_t i = 0; i < elements; ++i){
			a.destroy(data + i);
		}
		a.deallocate(data, data_size);
	}


	template<class T, class Allocator> _UCXXEXPORT void vector<T, Allocator>::reserve(size_type n){
		if(n > data_size){              //We never shrink...
			T * temp_ptr = data;
			size_type temp_size = data_size;

			data_size = n;
			data = a.allocate(data_size);

			for(size_type i = 0; i<elements; ++i){
				a.construct(data+i, temp_ptr[i]);
				a.destroy(temp_ptr+i);
			}
			a.deallocate(temp_ptr, temp_size);
		}
	}

	template<class T, class Allocator> _UCXXEXPORT void vector<T, Allocator>::resize(size_type sz, const T & c){
		if(sz > elements){      //Need to actually call constructor
			if(sz > data_size){
				reserve(sz + __UCLIBCXX_STL_BUFFER_SIZE__);
			}

			for(size_type i = elements; i<sz ; ++i){
				a.construct(data+i, c);
			}
			elements = sz;
		}else{
			downsize(sz);
		}
	}

	template<class T, class Allocator> _UCXXEXPORT void vector<T, Allocator>::downsize(size_type sz){
		if(sz < elements){      //Actually are downsizing
			for(size_t i = sz; i< elements; ++i){
				a.destroy(data+i);
			}
			elements = sz;
		}
	}


#ifndef __UCLIBCXX_COMPILE_VECTOR__
#ifdef __UCLIBCXX_EXPAND_VECTOR_BASIC__


#ifdef __UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__
	template<> _UCXXEXPORT vector<char, allocator<char> >::vector(const allocator<char>& al);
	template<> _UCXXEXPORT vector<char, allocator<char> >::vector(size_type n, const char & value, const allocator<char> & al);

	template<> _UCXXEXPORT vector<char, allocator<char> >::~vector();
	template<> _UCXXEXPORT vector<unsigned char, allocator<unsigned char> >::~vector();

#endif //__UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__

	template<> _UCXXEXPORT void vector<char, allocator<char> >::reserve(size_type n);
	template<> _UCXXEXPORT void vector<unsigned char, allocator<unsigned char> >::reserve(size_type n);
	template<> _UCXXEXPORT void vector<short int, allocator<short int> >::reserve(size_type n);
	template<> _UCXXEXPORT void vector<unsigned short int, allocator<unsigned short int> >::reserve(size_type n);
	template<> _UCXXEXPORT void vector<int, allocator<int> >::reserve(size_type n);
	template<> _UCXXEXPORT void vector<unsigned int, allocator<unsigned int> >::reserve(size_type n);
	template<> _UCXXEXPORT void vector<long int, allocator<long int> >::reserve(size_type n);
	template<> _UCXXEXPORT void vector<unsigned long int, allocator<unsigned long int> >::reserve(size_type n);
	template<> _UCXXEXPORT void vector<float, allocator<float> >::reserve(size_type n);
	template<> _UCXXEXPORT void vector<double, allocator<double> >::reserve(size_type n);
	template<> _UCXXEXPORT void vector<bool, allocator<bool> >::reserve(size_type n);

	template<> _UCXXEXPORT void vector<char, allocator<char> >::resize(size_type sz, const char & c);
	template<> _UCXXEXPORT void
		vector<unsigned char, allocator<unsigned char> >::resize(size_type sz, const unsigned char & c);
	template<> _UCXXEXPORT void vector<short int, allocator<short int> >::resize(size_type sz, const short & c);
	template<> _UCXXEXPORT void
		vector<unsigned short int, allocator<unsigned short int> >::resize(size_type sz, const unsigned short int & c);
	template<> _UCXXEXPORT void vector<int, allocator<int> >::resize(size_type sz, const int & c);
	template<> _UCXXEXPORT void vector<unsigned int, allocator<unsigned int> >::resize(size_type sz, const unsigned int & c);
	template<> _UCXXEXPORT void vector<long int, allocator<long int> >::resize(size_type sz, const long int & c);
	template<> _UCXXEXPORT void
		vector<unsigned long int, allocator<unsigned long int> >::resize(size_type sz, const unsigned long int & c);
	template<> _UCXXEXPORT void vector<float, allocator<float> >::resize(size_type sz, const float & c);
	template<> _UCXXEXPORT void vector<double, allocator<double> >::resize(size_type sz, const double & c);
	template<> _UCXXEXPORT void vector<bool, allocator<bool> >::resize(size_type sz, const bool & c);

#elif defined __UCLIBCXX_EXPAND_STRING_CHAR__

#ifdef __UCLIBCXX_EXPAND_CONSTRUCTORS_DESTRUCTORS__

	template<> _UCXXEXPORT vector<char, allocator<char> >::vector(const allocator<char>& al);
	template<> _UCXXEXPORT vector<char, allocator<char> >::vector(size_type n, const char & value, const allocator<char> & al);
	template<> _UCXXEXPORT vector<char, allocator<char> >::~vector();

#endif

	template<> _UCXXEXPORT void vector<char, allocator<char> >::reserve(size_type n);
	template<> _UCXXEXPORT void vector<char, allocator<char> >::resize(size_type sz, const char & c);

#endif
#endif



	template <class T, class Allocator> _UCXXEXPORT bool
		operator==(const vector<T,Allocator>& x, const vector<T,Allocator>& y)
	{
		if(x.size() !=y.size() ){
			return false;
		}
		for(size_t i = 0; i < x.size(); ++i){
			if(x[i] != y[i]){
				return false;
			}
		}
		return true;
	}

	template <class T, class Allocator> _UCXXEXPORT bool
		operator< (const vector<T,Allocator>& x, const vector<T,Allocator>& y)
	{
		less<typename iterator_traits<typename vector<T,Allocator>::iterator >::value_type> c;
                return lexicographical_compare(x.begin(), x.end(), y.begin(), y.end(), c);
	}
	template <class T, class Allocator> _UCXXEXPORT bool
		operator!=(const vector<T,Allocator>& x, const vector<T,Allocator>& y)
	{
		return !(x == y);
	}
	template <class T, class Allocator> _UCXXEXPORT bool
		operator> (const vector<T,Allocator>& x, const vector<T,Allocator>& y)
	{
		greater<typename iterator_traits<typename vector<T,Allocator>::iterator >::value_type> c;
                return lexicographical_compare(x.begin(), x.end(), y.begin(), y.end(), c);
	}
	template <class T, class Allocator> _UCXXEXPORT bool
		operator>=(const vector<T,Allocator>& x, const vector<T,Allocator>& y)
	{
		greater_equal<typename iterator_traits<typename vector<T,Allocator>::iterator >::value_type> c;
                return lexicographical_compare(x.begin(), x.end(), y.begin(), y.end(), c);
	}
	template <class T, class Allocator> _UCXXEXPORT bool
		operator<=(const vector<T,Allocator>& x, const vector<T,Allocator>& y)
	{
		less_equal<typename iterator_traits<typename vector<T,Allocator>::iterator >::value_type> c;
                return lexicographical_compare(x.begin(), x.end(), y.begin(), y.end(), c);
	}

	template <class T, class Allocator> _UCXXEXPORT void swap(vector<T,Allocator>& x, vector<T,Allocator>& y){
		x.swap(y);
	}

}

#pragma GCC visibility pop

#endif