2018-10-10 12:53:07 +03:00
|
|
|
#pragma once
|
|
|
|
|
|
|
|
#include "Assertions.h"
|
|
|
|
#include "OwnPtr.h"
|
2018-10-10 16:11:43 +03:00
|
|
|
#include "kmalloc.h"
|
2018-10-10 12:53:07 +03:00
|
|
|
#include <new>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <algorithm>
|
|
|
|
|
|
|
|
namespace AK {
|
|
|
|
|
|
|
|
template<typename T> class Vector;
|
|
|
|
|
|
|
|
template<typename T>
|
|
|
|
class VectorImpl {
|
|
|
|
public:
|
|
|
|
~VectorImpl() { }
|
|
|
|
static OwnPtr<VectorImpl> create(unsigned capacity)
|
|
|
|
{
|
|
|
|
size_t size = sizeof(VectorImpl) + sizeof(T) * capacity;
|
|
|
|
void* slot = kmalloc(size);
|
|
|
|
return OwnPtr<VectorImpl>(new (slot) VectorImpl(capacity));
|
|
|
|
}
|
|
|
|
|
|
|
|
unsigned size() const { return m_size; }
|
|
|
|
unsigned capacity() const { return m_capacity; }
|
|
|
|
|
|
|
|
T& at(unsigned i) { return *slot(i); }
|
|
|
|
const T& at(unsigned i) const { return *slot(i); }
|
|
|
|
|
2018-10-13 02:17:36 +03:00
|
|
|
void remove(unsigned index)
|
|
|
|
{
|
|
|
|
ASSERT(index < m_size);
|
|
|
|
at(index).~T();
|
|
|
|
for (unsigned i = index + 1; i < m_size; ++i) {
|
|
|
|
new (slot(i - 1)) T(std::move(at(i)));
|
|
|
|
at(i).~T();
|
|
|
|
}
|
|
|
|
|
|
|
|
--m_size;
|
|
|
|
}
|
|
|
|
|
2018-10-10 12:53:07 +03:00
|
|
|
private:
|
|
|
|
friend class Vector<T>;
|
|
|
|
|
|
|
|
VectorImpl(unsigned capacity) : m_capacity(capacity) { }
|
|
|
|
|
|
|
|
T* tail() { return reinterpret_cast<T*>(this + 1); }
|
|
|
|
T* slot(unsigned i) { return &tail()[i]; }
|
|
|
|
|
|
|
|
const T* tail() const { return reinterpret_cast<const T*>(this + 1); }
|
|
|
|
const T* slot(unsigned i) const { return &tail()[i]; }
|
|
|
|
|
|
|
|
unsigned m_size { 0 };
|
|
|
|
unsigned m_capacity;
|
|
|
|
};
|
|
|
|
|
|
|
|
template<typename T>
|
|
|
|
class Vector {
|
|
|
|
public:
|
|
|
|
Vector() { }
|
|
|
|
~Vector() { clear(); }
|
|
|
|
|
|
|
|
Vector(Vector&& other)
|
|
|
|
: m_impl(std::move(other.m_impl))
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
Vector& operator=(Vector&& other)
|
|
|
|
{
|
|
|
|
if (this != &other)
|
|
|
|
m_impl = std::move(other.m_impl);
|
|
|
|
return *this;
|
|
|
|
}
|
|
|
|
|
|
|
|
void clear()
|
|
|
|
{
|
|
|
|
for (unsigned i = 0; i < size(); ++i) {
|
|
|
|
at(i).~T();
|
|
|
|
}
|
|
|
|
m_impl = nullptr;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool isEmpty() const { return size() == 0; }
|
|
|
|
unsigned size() const { return m_impl ? m_impl->size() : 0; }
|
|
|
|
unsigned capacity() const { return m_impl ? m_impl->capacity() : 0; }
|
|
|
|
|
|
|
|
const T& at(unsigned i) const { return m_impl->at(i); }
|
|
|
|
T& at(unsigned i) { return m_impl->at(i); }
|
|
|
|
|
|
|
|
const T& operator[](unsigned i) const { return at(i); }
|
|
|
|
T& operator[](unsigned i) { return at(i); }
|
|
|
|
|
|
|
|
const T& first() const { return at(0); }
|
|
|
|
T& first() { return at(0); }
|
|
|
|
|
|
|
|
const T& last() const { return at(size() - 1); }
|
|
|
|
T& last() { return at(size() - 1); }
|
|
|
|
|
|
|
|
T takeLast()
|
|
|
|
{
|
|
|
|
ASSERT(!isEmpty());
|
|
|
|
T value = std::move(last());
|
|
|
|
last().~T();
|
|
|
|
--m_impl->m_size;
|
|
|
|
return value;
|
|
|
|
}
|
|
|
|
|
2018-10-13 02:17:36 +03:00
|
|
|
void remove(unsigned index)
|
|
|
|
{
|
|
|
|
m_impl->remove(index);
|
|
|
|
}
|
|
|
|
|
2018-10-10 12:53:07 +03:00
|
|
|
void append(T&& value)
|
|
|
|
{
|
|
|
|
ensureCapacity(size() + 1);
|
|
|
|
new (m_impl->slot(m_impl->m_size)) T(std::move(value));
|
|
|
|
++m_impl->m_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
void append(const T& value)
|
|
|
|
{
|
|
|
|
ensureCapacity(size() + 1);
|
|
|
|
new (m_impl->slot(m_impl->m_size)) T(value);
|
|
|
|
++m_impl->m_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
void ensureCapacity(unsigned neededCapacity)
|
|
|
|
{
|
|
|
|
if (capacity() >= neededCapacity)
|
|
|
|
return;
|
|
|
|
size_t newCapacity = paddedCapacity(neededCapacity);
|
|
|
|
auto newImpl = VectorImpl<T>::create(newCapacity);
|
|
|
|
if (m_impl) {
|
|
|
|
newImpl->m_size = m_impl->m_size;
|
|
|
|
for (unsigned i = 0; i < size(); ++i) {
|
|
|
|
new (newImpl->slot(i)) T(std::move(m_impl->at(i)));
|
|
|
|
m_impl->at(i).~T();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
m_impl = std::move(newImpl);
|
|
|
|
}
|
|
|
|
|
|
|
|
class Iterator {
|
|
|
|
public:
|
|
|
|
bool operator!=(const Iterator& other) { return m_index != other.m_index; }
|
|
|
|
Iterator& operator++() { ++m_index; return *this; }
|
|
|
|
T& operator*() { return m_vector[m_index]; }
|
|
|
|
private:
|
|
|
|
friend class Vector;
|
|
|
|
Iterator(Vector& vector, unsigned index) : m_vector(vector), m_index(index) { }
|
|
|
|
Vector& m_vector;
|
|
|
|
unsigned m_index { 0 };
|
|
|
|
};
|
|
|
|
|
|
|
|
Iterator begin() { return Iterator(*this, 0); }
|
|
|
|
Iterator end() { return Iterator(*this, size()); }
|
|
|
|
|
|
|
|
class ConstIterator {
|
|
|
|
public:
|
|
|
|
bool operator!=(const ConstIterator& other) { return m_index != other.m_index; }
|
|
|
|
ConstIterator& operator++() { ++m_index; return *this; }
|
|
|
|
const T& operator*() const { return m_vector[m_index]; }
|
|
|
|
private:
|
|
|
|
friend class Vector;
|
|
|
|
ConstIterator(const Vector& vector, const unsigned index) : m_vector(vector), m_index(index) { }
|
|
|
|
const Vector& m_vector;
|
|
|
|
unsigned m_index { 0 };
|
|
|
|
};
|
|
|
|
|
2018-10-13 02:17:36 +03:00
|
|
|
ConstIterator begin() const { return ConstIterator(*this, 0); }
|
|
|
|
ConstIterator end() const { return ConstIterator(*this, size()); }
|
2018-10-10 12:53:07 +03:00
|
|
|
|
|
|
|
private:
|
|
|
|
static unsigned paddedCapacity(unsigned capacity)
|
|
|
|
{
|
|
|
|
return std::max(4u, capacity + (capacity / 4) + 4);
|
|
|
|
}
|
|
|
|
|
|
|
|
OwnPtr<VectorImpl<T>> m_impl;
|
|
|
|
};
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
using AK::Vector;
|
|
|
|
|