ladybird/AK/TypedTransfer.h
Ali Mohammad Pur f96a3c002a Everywhere: Stop shoving things into ::std and mentioning them as such
Note that this still keeps the old behaviour of putting things in std by
default on serenity so the tools can be happy, but if USING_AK_GLOBALLY
is unset, AK behaves like a good citizen and doesn't try to put things
in the ::std namespace.

std::nothrow_t and its friends get to stay because I'm being told that
compilers assume things about them and I can't yeet them into a
different namespace...for now.
2022-12-14 11:44:32 +01:00

88 lines
2.0 KiB
C++

/*
* Copyright (c) 2020, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Traits.h>
namespace AK {
template<typename T>
class TypedTransfer {
public:
static void move(T* destination, T* source, size_t count)
{
if (count == 0)
return;
if constexpr (Traits<T>::is_trivial()) {
__builtin_memmove(destination, source, count * sizeof(T));
return;
}
for (size_t i = 0; i < count; ++i) {
if (destination <= source)
new (&destination[i]) T(AK::move(source[i]));
else
new (&destination[count - i - 1]) T(AK::move(source[count - i - 1]));
}
}
static size_t copy(T* destination, T const* source, size_t count)
{
if (count == 0)
return 0;
if constexpr (Traits<T>::is_trivial()) {
if (count == 1)
*destination = *source;
else
__builtin_memmove(destination, source, count * sizeof(T));
return count;
}
for (size_t i = 0; i < count; ++i) {
if (destination <= source)
new (&destination[i]) T(source[i]);
else
new (&destination[count - i - 1]) T(source[count - i - 1]);
}
return count;
}
static bool compare(T const* a, T const* b, size_t count)
{
if (count == 0)
return true;
if constexpr (Traits<T>::is_trivial())
return !__builtin_memcmp(a, b, count * sizeof(T));
for (size_t i = 0; i < count; ++i) {
if (a[i] != b[i])
return false;
}
return true;
}
static void delete_(T* ptr, size_t count)
{
if (count == 0)
return;
if constexpr (Traits<T>::is_trivial()) {
return;
}
for (size_t i = 0; i < count; ++i)
ptr[i].~T();
}
};
}