Doing these as custom classes might be faster, especially when writing
them in SSE, but this would cause a lot of Code duplication and due to
the nature of constexprs and the intelligence of the compiler they might
be using SSE/MMX either way
It's prone to finding "technically uninitialized but can never happen"
cases, particularly in Optional<T> and Variant<Ts...>.
The general case seems to be that it cannot infer the dependency
between Variant's index (or Optional's boolean state) and a particular
alternative (or Optional's buffer) being untouched.
So it can flag cases like this:
```c++
if (index == StaticIndexForF)
new (new_buffer) F(move(*bit_cast<F*>(old_buffer)));
```
The code in that branch can _technically_ make a partially initialized
`F`, but that path can never be taken since the buffer holding an
object of type `F` and the condition being true are correlated, and so
will never be taken _unless_ the buffer holds an object of type `F`.
This commit also removed the various 'diagnostic ignored' pragmas used
to work around this warning, as they no longer do anything.
This commit makes it possible to instantiate `Vector<T&>` and use it
to store references to `T` in a vector.
All non-pointer observers are made to return the reference, and the
pointer observers simply yield the underlying pointer.
Note that the 'find_*' methods act on the values and not the pointers
that are stored in the vector.
This commit also makes errors in various vector methods much more
readable by directly using requires-clauses on them.
And finally, it should be noted that Vector cannot hold temporaries :^)
The methods of this class were all over the place, this commit reorders
them to place them in a more logical order:
- Constructors/Destructor
- Observers
- Comparisons and const existence checks
- Mutators: insert
- Mutators: append
- Mutators: prepend
- Mutators: assignment
- Mutators: remove
- OOM-safe mutators: insert
- OOM-safe mutators: append
- OOM-safe mutators: prepend
- OOM-safe size management
- Size management
- Iterators
This fixes a bug where a Utf8View was created with data from a temporary
string, which was immediately deleted. This lead to a use-after-free
issue. This also changes most occurences for StringBuilder::to_string in
URLParser to use ::string_view(), as the value is passed as StringView
const& most of the time anyways.
This fixes oss-fuzz issue 34973.
When a code point is invalid, the full string was outputted to the debug
output. For large strings, this can make the system quite slow.
Furthermore, one of the cases incorrectly assumed the data to be null
terminated. This patch modifies the debug statements not to print the
full string.
This fixes oss-fuzz issue 35050.
Other software might not expect these to be defined and behave
differently if they _are_ defined, e.g. scummvm which checks if
the TODO macro is defined and fails to build if it is.
This commit initializes the LibVideo library and implements parsing
basic Matroska container files. Currently, it will only parse audio
and video tracks.
Previously, AK::Function would accept _any_ callable type, and try to
call it when called, first with the given set of arguments, then with
zero arguments, and if all of those failed, it would simply not call the
function and **return a value-constructed Out type**.
This lead to many, many, many hard to debug situations when someone
forgot a `const` in their lambda argument types, and many cases of
people taking zero arguments in their lambdas to ignore them.
This commit reworks the Function interface to not include any such
surprising behaviour, if your function instance is not callable with
the declared argument set of the Function, it can simply not be
assigned to that Function instance, end of story.
This changes URL parser to use the 0xFFFFFFFF constant instead of 0 to
indicate end of file. This fixes a bug where inputs containing null
bytes would terminate the parser early, because they were interpreted
as end of file.
This patch adds a state_name method to URLParser to convert a state to a
string. With this, the debugging statements now display the state names.
Furthermore, this fixes a bug where non-ASCII code points were
formatted as characters, which fails an assertion in the formatting
system.
Because non-ASCII code points have negative byte values, trimming away
control characters requires checking for negative bytes values.
This also adds a test case with a URL containing non-ASCII code points.
Ideally a Function should not be clear()ed while it's running.
Unfortunately a number of callers do just that and identifying all of
them would require inspecting all call sites for operator() and clear().
Instead this adds support for deferring clear() until after the
function has finished executing.
Previously this was generating a crazy number of symbols, and it was
also pretty-damn-slow as it was defined recursively, which made the
compiler incapable of inlining it (due to the many many layers of
recursion before it terminated).
This commit replaces the recursion with a pack expansion and marks it
always-inline.
StringView::lines() supports line-separators “\n”, “\r”, and “\r\n”.
The method will drop an entire line if it is surrounded by “\r”
and “\n” separators on the left and right sides respectively.
The previous behavior was to always VERIFY that the UTF-8 bytes were
valid when iterating over the code points of an UTF8View. This change
makes it so we instead output the 0xFFFD 'REPLACEMENT CHARACTER'
code point when encountering invalid bytes, and keep iterating the
view after skipping one byte.
Leaving the decision to the consumer would break symmetry with the
UTF32View API, which would in turn require heavy refactoring and/or
code duplication in generic code such as the one found in
Gfx::Painter and the Shell.
To make it easier for the consumers to detect the original bytes, we
provide a new method on the iterator that returns a Span over the
data that has been decoded. This method is immediately used in the
TextNode::compute_text_for_rendering method, which previously did
this in a ad-hoc waay.
This also add tests for the new behavior in TestUtf8.cpp, as well
as reinforcements to the existing tests to check if the underlying
bytes match up with their expected values.
This replaces ctype.h with CharacterType.h everywhere I could find
issues with narrowing conversions. While using it will probably make
sense almost everywhere in the future, the most critical places should
have been addressed.
This patch introduces CharacterTypes.h, which aims to be a replacement
for most usages of ctype.h. In contrast to that implementation, this
header makes use of exclusively constexpr functions and support the full
Unicode code point set without any narrowing-conversion issues.
In order for IntrusiveList to be capable of replacing InlineLinkedList,
it needs to support reverse iteration. InlineLinkedList currently
supports manual reverse iteration by calling list->last() followed by
node->prev().
Previously we'd incur the costs for a function call via the PLT even
for the most trivial ref-count actions like increasing/decreasing the
reference count.
By moving the code to the header file we allow the compiler to inline
this code into the caller's function.
Checking for this (and get()'ing it) is always invalid, so let's just
disallow it.
This also finds two bugs where the code is checking for types that can
never actually be in the variant (which was actually a refactor
artifact).
This changes the URL class to use the correct constness for getters,
setters and other methods. It also changes the entire class to use east
const style.
This patch introduces a new operator== to compare an Optional to its
contained type directly. If the Optional does not contain a value, the
comparison will always return false.
This also adds a test case for the new behavior as well as comparison
between Optional objects themselves.
This adds a hostname parameter as the third parameter to
URL::create_with_file_scheme(). If the hostname is "localhost", it will
be ignored (as per the URL specification).
This can for example be used by ls(1) to create more conforming file
URLs.
