mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-29 11:00:29 +00:00
91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/StringBuilder.h>
|
|
#include <AK/StringView.h>
|
|
#include <AK/Vector.h>
|
|
#include <Kernel/FileSystem/Custody.h>
|
|
#include <Kernel/FileSystem/Inode.h>
|
|
|
|
namespace Kernel {
|
|
|
|
KResultOr<NonnullRefPtr<Custody>> Custody::try_create(Custody* parent, StringView name, Inode& inode, int mount_flags)
|
|
{
|
|
auto name_kstring = KString::try_create(name);
|
|
if (!name_kstring)
|
|
return ENOMEM;
|
|
auto custody = adopt_ref_if_nonnull(new (nothrow) Custody(parent, name_kstring.release_nonnull(), inode, mount_flags));
|
|
if (!custody)
|
|
return ENOMEM;
|
|
return custody.release_nonnull();
|
|
}
|
|
|
|
Custody::Custody(Custody* parent, NonnullOwnPtr<KString> name, Inode& inode, int mount_flags)
|
|
: m_parent(parent)
|
|
, m_name(move(name))
|
|
, m_inode(inode)
|
|
, m_mount_flags(mount_flags)
|
|
{
|
|
}
|
|
|
|
Custody::~Custody()
|
|
{
|
|
}
|
|
|
|
OwnPtr<KString> Custody::try_create_absolute_path() const
|
|
{
|
|
if (!parent())
|
|
return KString::try_create("/"sv);
|
|
|
|
Vector<Custody const*, 32> custody_chain;
|
|
size_t path_length = 0;
|
|
for (auto* custody = this; custody; custody = custody->parent()) {
|
|
custody_chain.append(custody);
|
|
path_length += custody->m_name->length() + 1;
|
|
}
|
|
VERIFY(path_length > 0);
|
|
|
|
char* buffer;
|
|
auto string = KString::try_create_uninitialized(path_length - 1, buffer);
|
|
if (!string)
|
|
return string;
|
|
size_t string_index = 0;
|
|
for (size_t custody_index = custody_chain.size() - 1; custody_index > 0; --custody_index) {
|
|
buffer[string_index] = '/';
|
|
++string_index;
|
|
auto& custody_name = *custody_chain[custody_index - 1]->m_name;
|
|
__builtin_memcpy(buffer + string_index, custody_name.characters(), custody_name.length());
|
|
string_index += custody_name.length();
|
|
}
|
|
VERIFY(string->length() == string_index);
|
|
buffer[string_index] = 0;
|
|
return string;
|
|
}
|
|
|
|
String Custody::absolute_path() const
|
|
{
|
|
if (!parent())
|
|
return "/";
|
|
Vector<Custody const*, 32> custody_chain;
|
|
for (auto* custody = this; custody; custody = custody->parent())
|
|
custody_chain.append(custody);
|
|
StringBuilder builder;
|
|
for (int i = custody_chain.size() - 2; i >= 0; --i) {
|
|
builder.append('/');
|
|
builder.append(custody_chain[i]->name());
|
|
}
|
|
return builder.to_string();
|
|
}
|
|
|
|
bool Custody::is_readonly() const
|
|
{
|
|
if (m_mount_flags & MS_RDONLY)
|
|
return true;
|
|
|
|
return m_inode->fs().is_readonly();
|
|
}
|
|
|
|
}
|