mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 02:32:45 +00:00
7c0540a229
This has KString, KBuffer, DoubleBuffer, KBufferBuilder, IOWindow, UserOrKernelBuffer and ScopedCritical classes being moved to the Kernel/Library subdirectory. Also, move the panic and assertions handling code to that directory.
89 lines
2.6 KiB
C++
89 lines
2.6 KiB
C++
/*
|
|
* Copyright (c) 2021, Max Wipfli <max.wipfli@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Vector.h>
|
|
#include <Kernel/Library/KLexicalPath.h>
|
|
|
|
namespace Kernel::KLexicalPath {
|
|
|
|
static StringView const s_single_dot = "."sv;
|
|
|
|
bool is_absolute(StringView path)
|
|
{
|
|
return !path.is_empty() && path[0] == '/';
|
|
}
|
|
|
|
bool is_canonical(StringView path)
|
|
{
|
|
// FIXME: This can probably be done more efficiently.
|
|
if (path.is_empty())
|
|
return false;
|
|
if (path.ends_with('/') && path.length() != 1)
|
|
return false;
|
|
if (path.starts_with("./"sv) || path.contains("/./"sv) || path.ends_with("/."sv))
|
|
return false;
|
|
if (path.starts_with("../"sv) || path.contains("/../"sv) || path.ends_with("/.."sv))
|
|
return false;
|
|
if (path.contains("//"sv))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
StringView basename(StringView a_path)
|
|
{
|
|
if (a_path == "/"sv)
|
|
return a_path;
|
|
if (a_path.is_empty())
|
|
return s_single_dot;
|
|
auto path = a_path.trim("/"sv, TrimMode::Right);
|
|
// NOTE: If it's empty now, it means the path was just a series of slashes.
|
|
if (path.is_empty())
|
|
return a_path.substring_view(0, 1);
|
|
auto slash_index = path.find_last('/');
|
|
if (!slash_index.has_value())
|
|
return path;
|
|
auto basename = path.substring_view(*slash_index + 1);
|
|
return basename;
|
|
}
|
|
|
|
StringView dirname(StringView path)
|
|
{
|
|
VERIFY(is_canonical(path));
|
|
auto slash_index = path.find_last('/');
|
|
VERIFY(slash_index.has_value());
|
|
return path.substring_view(0, *slash_index);
|
|
}
|
|
|
|
Vector<StringView> parts(StringView path)
|
|
{
|
|
VERIFY(is_canonical(path));
|
|
return path.split_view('/');
|
|
}
|
|
|
|
ErrorOr<NonnullOwnPtr<KString>> try_join(StringView first, StringView second)
|
|
{
|
|
VERIFY(is_canonical(first));
|
|
VERIFY(is_canonical(second));
|
|
VERIFY(!is_absolute(second));
|
|
|
|
if (first == "/"sv) {
|
|
char* buffer;
|
|
auto string = TRY(KString::try_create_uninitialized(1 + second.length(), buffer));
|
|
buffer[0] = '/';
|
|
__builtin_memcpy(buffer + 1, second.characters_without_null_termination(), second.length());
|
|
buffer[string->length()] = 0;
|
|
return string;
|
|
}
|
|
char* buffer;
|
|
auto string = TRY(KString::try_create_uninitialized(first.length() + 1 + second.length(), buffer));
|
|
__builtin_memcpy(buffer, first.characters_without_null_termination(), first.length());
|
|
buffer[first.length()] = '/';
|
|
__builtin_memcpy(buffer + first.length() + 1, second.characters_without_null_termination(), second.length());
|
|
buffer[string->length()] = 0;
|
|
return string;
|
|
}
|
|
|
|
}
|