forked from OctaForge/libostd
414 lines
12 KiB
C++
414 lines
12 KiB
C++
/* Self-expanding dynamic array implementation for OctaSTD.
|
|
*
|
|
* This file is part of OctaSTD. See COPYING.md for futher information.
|
|
*/
|
|
|
|
#ifndef OCTA_VECTOR_H
|
|
#define OCTA_VECTOR_H
|
|
|
|
#include <string.h>
|
|
#include <stddef.h>
|
|
|
|
#include "octa/type_traits.h"
|
|
#include "octa/utility.h"
|
|
#include "octa/range.h"
|
|
#include "octa/algorithm.h"
|
|
#include "octa/initializer_list.h"
|
|
#include "octa/memory.h"
|
|
|
|
namespace octa {
|
|
|
|
namespace detail {
|
|
template<typename T, typename A, bool = octa::IsEmpty<A>::value>
|
|
struct VectorPair;
|
|
|
|
template<typename T, typename A>
|
|
struct VectorPair<T, A, false> { /* non-empty allocator */
|
|
T *p_ptr;
|
|
A p_a;
|
|
|
|
template<typename U>
|
|
VectorPair(T *ptr, U &&a): p_ptr(ptr),
|
|
p_a(octa::forward<U>(a)) {}
|
|
|
|
A &get_alloc() { return p_a; }
|
|
const A &get_alloc() const { return p_a; }
|
|
|
|
void swap(VectorPair &v) {
|
|
octa::swap(p_ptr, v.p_ptr);
|
|
octa::swap(p_a , v.p_a );
|
|
}
|
|
};
|
|
|
|
template<typename T, typename A>
|
|
struct VectorPair<T, A, true>: A { /* empty allocator */
|
|
T *p_ptr;
|
|
|
|
template<typename U>
|
|
VectorPair(T *ptr, U &&a):
|
|
A(octa::forward<U>(a)), p_ptr(ptr) {}
|
|
|
|
A &get_alloc() { return *this; }
|
|
const A &get_alloc() const { return *this; }
|
|
|
|
void swap(VectorPair &v) {
|
|
octa::swap(p_ptr, v.p_ptr);
|
|
}
|
|
};
|
|
} /* namespace detail */
|
|
|
|
template<typename T, typename A = octa::Allocator<T>>
|
|
class Vector {
|
|
using VecPair = octa::detail::VectorPair<T, A>;
|
|
|
|
VecPair p_buf;
|
|
octa::Size p_len, p_cap;
|
|
|
|
void insert_base(octa::Size idx, octa::Size n) {
|
|
if (p_len + n > p_cap) reserve(p_len + n);
|
|
p_len += n;
|
|
for (octa::Size i = p_len - 1; i > idx + n - 1; --i) {
|
|
p_buf.p_ptr[i] = octa::move(p_buf.p_ptr[i - n]);
|
|
}
|
|
}
|
|
|
|
template<typename R>
|
|
void ctor_from_range(R &range, octa::EnableIf<
|
|
octa::IsFiniteRandomAccessRange<R>::value, bool
|
|
> = true) {
|
|
octa::RangeSize<R> l = range.size();
|
|
reserve(l);
|
|
p_len = l;
|
|
for (octa::Size i = 0; !range.empty(); range.pop_front()) {
|
|
octa::allocator_construct(p_buf.get_alloc(),
|
|
&p_buf.p_ptr[i], range.front());
|
|
++i;
|
|
}
|
|
}
|
|
|
|
template<typename R>
|
|
void ctor_from_range(R &range, EnableIf<
|
|
!octa::IsFiniteRandomAccessRange<R>::value, bool
|
|
> = true) {
|
|
octa::Size i = 0;
|
|
for (; !range.empty(); range.pop_front()) {
|
|
reserve(i + 1);
|
|
octa::allocator_construct(p_buf.get_alloc(),
|
|
&p_buf.p_ptr[i], range.front());
|
|
++i;
|
|
p_len = i;
|
|
}
|
|
}
|
|
|
|
void copy_contents(const Vector &v) {
|
|
if (octa::IsPod<T>()) {
|
|
memcpy(p_buf.p_ptr, v.p_buf.p_ptr, p_len * sizeof(T));
|
|
} else {
|
|
T *cur = p_buf.p_ptr, *last = p_buf.p_ptr + p_len;
|
|
T *vbuf = v.p_buf.p_ptr;
|
|
while (cur != last) {
|
|
octa::allocator_construct(p_buf.get_alloc(),
|
|
cur++, *vbuf++);
|
|
}
|
|
}
|
|
}
|
|
|
|
public:
|
|
using Size = octa::Size;
|
|
using Difference = octa::Ptrdiff;
|
|
using Value = T;
|
|
using Reference = T &;
|
|
using ConstReference = const T &;
|
|
using Pointer = T *;
|
|
using ConstPointer = const T *;
|
|
using Range = octa::PointerRange<T>;
|
|
using ConstRange = octa::PointerRange<const T>;
|
|
using Allocator = A;
|
|
|
|
Vector(const A &a = A()): p_buf(nullptr, a), p_len(0), p_cap(0) {}
|
|
|
|
explicit Vector(Size n, const T &val = T(),
|
|
const A &al = A()): Vector(al) {
|
|
p_buf.p_ptr = octa::allocator_allocate(p_buf.get_alloc(), n);
|
|
p_len = p_cap = n;
|
|
T *cur = p_buf.p_ptr, *last = p_buf.p_ptr + n;
|
|
while (cur != last)
|
|
octa::allocator_construct(p_buf.get_alloc(), cur++, val);
|
|
}
|
|
|
|
Vector(const Vector &v): p_buf(nullptr,
|
|
octa::allocator_container_copy(v.p_buf.get_alloc())), p_len(0),
|
|
p_cap(0) {
|
|
reserve(v.p_cap);
|
|
p_len = v.p_len;
|
|
copy_contents(v);
|
|
}
|
|
|
|
Vector(const Vector &v, const A &a): p_buf(nullptr, a),
|
|
p_len(0), p_cap(0) {
|
|
reserve(v.p_cap);
|
|
p_len = v.p_len;
|
|
copy_contents(v);
|
|
}
|
|
|
|
Vector(Vector &&v): p_buf(v.p_buf.p_ptr,
|
|
octa::move(v.p_buf.get_alloc())), p_len(v.p_len), p_cap(v.p_cap) {
|
|
v.p_buf.p_ptr = nullptr;
|
|
v.p_len = v.p_cap = 0;
|
|
}
|
|
|
|
Vector(Vector &&v, const A &a) {
|
|
if (a != v.a) {
|
|
p_buf.get_alloc() = a;
|
|
reserve(v.p_cap);
|
|
p_len = v.p_len;
|
|
if (octa::IsPod<T>()) {
|
|
memcpy(p_buf.p_ptr, v.p_buf.p_ptr, p_len * sizeof(T));
|
|
} else {
|
|
T *cur = p_buf.p_ptr, *last = p_buf.p_ptr + p_len;
|
|
T *vbuf = v.p_buf.p_ptr;
|
|
while (cur != last) {
|
|
octa::allocator_construct(p_buf.get_alloc(), cur++,
|
|
octa::move(*vbuf++));
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
new (&p_buf) VecPair(v.p_buf.p_ptr,
|
|
octa::move(v.p_buf.get_alloc()));
|
|
p_len = v.p_len;
|
|
p_cap = v.p_cap;
|
|
v.p_buf.p_ptr = nullptr;
|
|
v.p_len = v.p_cap = 0;
|
|
}
|
|
|
|
Vector(InitializerList<T> v, const A &a = A()): Vector(a) {
|
|
Size l = v.end() - v.begin();
|
|
const T *ptr = v.begin();
|
|
reserve(l);
|
|
for (Size i = 0; i < l; ++i)
|
|
octa::allocator_construct(p_buf.get_alloc(),
|
|
&p_buf.p_ptr[i], ptr[i]);
|
|
p_len = l;
|
|
}
|
|
|
|
template<typename R> Vector(R range, const A &a = A()):
|
|
Vector(a) {
|
|
ctor_from_range(range);
|
|
}
|
|
|
|
~Vector() {
|
|
clear();
|
|
octa::allocator_deallocate(p_buf.get_alloc(), p_buf.p_ptr, p_cap);
|
|
}
|
|
|
|
void clear() {
|
|
if (p_len > 0 && !octa::IsPod<T>()) {
|
|
T *cur = p_buf.p_ptr, *last = p_buf.p_ptr + p_len;
|
|
while (cur != last)
|
|
octa::allocator_destroy(p_buf.get_alloc(), cur++);
|
|
}
|
|
p_len = 0;
|
|
}
|
|
|
|
Vector &operator=(const Vector &v) {
|
|
if (this == &v) return *this;
|
|
clear();
|
|
reserve(v.p_cap);
|
|
p_len = v.p_len;
|
|
copy_contents(v);
|
|
return *this;
|
|
}
|
|
|
|
Vector &operator=(Vector &&v) {
|
|
clear();
|
|
octa::allocator_deallocate(p_buf.get_alloc(), p_buf.p_ptr, p_cap);
|
|
p_len = v.p_len;
|
|
p_cap = v.p_cap;
|
|
p_buf.~VecPair();
|
|
new (&p_buf) VecPair(v.disown(), octa::move(v.p_buf.get_alloc()));
|
|
return *this;
|
|
}
|
|
|
|
Vector &operator=(InitializerList<T> il) {
|
|
clear();
|
|
Size ilen = il.end() - il.begin();
|
|
reserve(ilen);
|
|
if (octa::IsPod<T>()) {
|
|
memcpy(p_buf.p_ptr, il.begin(), ilen);
|
|
} else {
|
|
T *tbuf = p_buf.p_ptr, *ibuf = il.begin(),
|
|
*last = il.end();
|
|
while (ibuf != last) {
|
|
octa::allocator_construct(p_buf.get_alloc(),
|
|
tbuf++, *ibuf++);
|
|
}
|
|
}
|
|
p_len = ilen;
|
|
return *this;
|
|
}
|
|
|
|
template<typename R>
|
|
Vector &operator=(R range) {
|
|
clear();
|
|
ctor_from_range(range);
|
|
}
|
|
|
|
void resize(Size n, const T &v = T()) {
|
|
Size l = p_len;
|
|
reserve(n);
|
|
p_len = n;
|
|
if (octa::IsPod<T>()) {
|
|
for (Size i = l; i < p_len; ++i) {
|
|
p_buf.p_ptr[i] = T(v);
|
|
}
|
|
} else {
|
|
T *first = p_buf.p_ptr + l;
|
|
T *last = p_buf.p_ptr + p_len;
|
|
while (first != last)
|
|
octa::allocator_construct(p_buf.get_alloc(), first++, v);
|
|
}
|
|
}
|
|
|
|
void reserve(Size n) {
|
|
if (n <= p_cap) return;
|
|
Size oc = p_cap;
|
|
if (!oc) {
|
|
p_cap = octa::max(n, Size(8));
|
|
} else {
|
|
while (p_cap < n) p_cap *= 2;
|
|
}
|
|
T *tmp = octa::allocator_allocate(p_buf.get_alloc(), p_cap);
|
|
if (oc > 0) {
|
|
if (octa::IsPod<T>()) {
|
|
memcpy(tmp, p_buf.p_ptr, p_len * sizeof(T));
|
|
} else {
|
|
T *cur = p_buf.p_ptr, *tcur = tmp,
|
|
*last = tmp + p_len;
|
|
while (tcur != last) {
|
|
octa::allocator_construct(p_buf.get_alloc(), tcur++,
|
|
octa::move(*cur));
|
|
octa::allocator_destroy(p_buf.get_alloc(), cur);
|
|
++cur;
|
|
}
|
|
}
|
|
octa::allocator_deallocate(p_buf.get_alloc(), p_buf.p_ptr, oc);
|
|
}
|
|
p_buf.p_ptr = tmp;
|
|
}
|
|
|
|
T &operator[](Size i) { return p_buf.p_ptr[i]; }
|
|
const T &operator[](Size i) const { return p_buf.p_ptr[i]; }
|
|
|
|
T &at(Size i) { return p_buf.p_ptr[i]; }
|
|
const T &at(Size i) const { return p_buf.p_ptr[i]; }
|
|
|
|
T &push(const T &v) {
|
|
if (p_len == p_cap) reserve(p_len + 1);
|
|
octa::allocator_construct(p_buf.get_alloc(),
|
|
&p_buf.p_ptr[p_len], v);
|
|
return p_buf.p_ptr[p_len++];
|
|
}
|
|
|
|
T &push() {
|
|
if (p_len == p_cap) reserve(p_len + 1);
|
|
octa::allocator_construct(p_buf.get_alloc(), &p_buf.p_ptr[p_len]);
|
|
return p_buf.p_ptr[p_len++];
|
|
}
|
|
|
|
template<typename ...U>
|
|
T &emplace_back(U &&...args) {
|
|
if (p_len == p_cap) reserve(p_len + 1);
|
|
octa::allocator_construct(p_buf.get_alloc(), &p_buf.p_ptr[p_len],
|
|
octa::forward<U>(args)...);
|
|
return p_buf.p_ptr[p_len++];
|
|
}
|
|
|
|
void pop() {
|
|
if (!octa::IsPod<T>()) {
|
|
octa::allocator_destroy(p_buf.get_alloc(),
|
|
&p_buf.p_ptr[--p_len]);
|
|
} else {
|
|
--p_len;
|
|
}
|
|
}
|
|
|
|
T &front() { return p_buf.p_ptr[0]; }
|
|
const T &front() const { return p_buf.p_ptr[0]; }
|
|
|
|
T &back() { return p_buf.p_ptr[p_len - 1]; }
|
|
const T &back() const { return p_buf.p_ptr[p_len - 1]; }
|
|
|
|
T *data() { return p_buf.p_ptr; }
|
|
const T *data() const { return p_buf.p_ptr; }
|
|
|
|
Size size() const { return p_len; }
|
|
Size capacity() const { return p_cap; }
|
|
|
|
bool empty() const { return (p_len == 0); }
|
|
|
|
bool in_range(Size idx) { return idx < p_len; }
|
|
bool in_range(int idx) { return idx >= 0 && Size(idx) < p_len; }
|
|
bool in_range(const T *ptr) {
|
|
return ptr >= p_buf.p_ptr && ptr < &p_buf.p_ptr[p_len];
|
|
}
|
|
|
|
T *disown() {
|
|
T *r = p_buf.p_ptr;
|
|
p_buf.p_ptr = nullptr;
|
|
p_len = p_cap = 0;
|
|
return r;
|
|
}
|
|
|
|
T *insert(Size idx, T &&v) {
|
|
insert_base(idx, 1);
|
|
p_buf.p_ptr[idx] = octa::move(v);
|
|
return &p_buf.p_ptr[idx];
|
|
}
|
|
|
|
T *insert(Size idx, const T &v) {
|
|
insert_base(idx, 1);
|
|
p_buf.p_ptr[idx] = v;
|
|
return &p_buf.p_ptr[idx];
|
|
}
|
|
|
|
T *insert(Size idx, Size n, const T &v) {
|
|
insert_base(idx, n);
|
|
for (Size i = 0; i < n; ++i) {
|
|
p_buf.p_ptr[idx + i] = v;
|
|
}
|
|
return &p_buf.p_ptr[idx];
|
|
}
|
|
|
|
template<typename U>
|
|
T *insert_range(Size idx, U range) {
|
|
Size l = range.size();
|
|
insert_base(idx, l);
|
|
for (Size i = 0; i < l; ++i) {
|
|
p_buf.p_ptr[idx + i] = range.front();
|
|
range.pop_front();
|
|
}
|
|
return &p_buf.p_ptr[idx];
|
|
}
|
|
|
|
T *insert(Size idx, InitializerList<T> il) {
|
|
return insert_range(idx, octa::each(il));
|
|
}
|
|
|
|
Range each() {
|
|
return Range(p_buf.p_ptr, p_buf.p_ptr + p_len);
|
|
}
|
|
ConstRange each() const {
|
|
return ConstRange(p_buf.p_ptr, p_buf.p_ptr + p_len);
|
|
}
|
|
|
|
void swap(Vector &v) {
|
|
octa::swap(p_len, v.p_len);
|
|
octa::swap(p_cap, v.p_cap);
|
|
p_buf.swap(v.p_buf);
|
|
}
|
|
};
|
|
|
|
} /* namespace octa */
|
|
|
|
#endif |