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/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/KString.h>
extern bool g_in_early_boot;
namespace Kernel {
OwnPtr<KString> KString::try_create(StringView const& string)
{
char* characters = nullptr;
size_t length = string.length();
auto new_string = KString::try_create_uninitialized(length, characters);
if (!new_string)
return {};
if (!string.is_empty())
__builtin_memcpy(characters, string.characters_without_null_termination(), length);
characters[length] = '\0';
return new_string;
}
NonnullOwnPtr<KString> KString::must_create(StringView const& string)
{
// We can only enforce success during early boot.
VERIFY(g_in_early_boot);
auto kstring = KString::try_create(string);
VERIFY(kstring != nullptr);
return kstring.release_nonnull();
}
OwnPtr<KString> KString::try_create_uninitialized(size_t length, char*& characters)
{
size_t allocation_size = sizeof(KString) + (sizeof(char) * length) + sizeof(char);
auto* slot = kmalloc(allocation_size);
if (!slot)
return {};
auto* new_string = new (slot) KString(length);
characters = new_string->m_characters;
return adopt_own_if_nonnull(new_string);
}
NonnullOwnPtr<KString> KString::must_create_uninitialized(size_t length, char*& characters)
{
// We can only enforce success during early boot.
VERIFY(g_in_early_boot);
auto kstring = KString::try_create_uninitialized(length, characters);
VERIFY(kstring != nullptr);
return kstring.release_nonnull();
}
OwnPtr<KString> KString::try_clone() const
{
return try_create(view());
}
void KString::operator delete(void* string)
{
if (!string)
return;
size_t allocation_size = sizeof(KString) + (sizeof(char) * static_cast<KString*>(string)->m_length) + sizeof(char);
kfree_sized(string, allocation_size);
}
}
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