ladybird/AK/TypedTransfer.h
Brian Gianforcaro 1682f0b760 Everything: Move to SPDX license identifiers in all files.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.

See: https://spdx.dev/resources/use/#identifiers

This was done with the `ambr` search and replace tool.

 ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
2021-04-22 11:22:27 +02:00

74 lines
1.6 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)
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(std::move(source[i]));
else
new (&destination[count - i - 1]) T(std::move(source[count - i - 1]));
}
return;
}
static size_t copy(T* destination, const T* source, size_t count)
{
if (!count)
return 0;
if constexpr (Traits<T>::is_trivial()) {
__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(const T* a, const T* b, size_t count)
{
if (!count)
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;
}
};
}