If we call these two functions on a negative value, undefined behavior
occurs due to casting a negative double to an unsigned integer. These
functions are defined to perform modular arithmetic, so negative values
can be fixed up by adding 2^8/2^16.
The reason why this step is not mentioned in ECMA-262 is that it defines
modular arithmetic so that `x mod m` had the same sign as `m`, while
LibM's `fmod(x, m)` copies `x`'s sign.
This issue was found by UBSAN with the Clang toolchain.
Casting a floating point number to an integer and comparing that against
the original value is not a good way to test if it is a whole number. It
may cause unnecessary narrowing conversion issues and UB. This was the
case, which was caught be Clang's `-fsanitize=float-cast-overflow`.
This commit changes the code to use `is_integral_number`, as suggested
in ECMA-262.
If the argument to this function is greater then or equal to 2^32, the
`double` => `u32` cast produces undefined behavior, which Clang catches.
To fix this, we now use `ToUint32` for getting the integer argument, as
specified by ECMA-262.
This helps us avoid weird truncation issues and fixes a bug on Clang
builds where truncation while reading caused the DIE offsets following
large LEB128 numbers to be incorrect. This removes the need for the
separate `LongUnsignedNumber` type.
This LineProgram instruction is emitted by Clang. Although we currently
have no use for it (it's mostly a debugger feature), we need to handle
this opcode, as otherwise CrashReporter wouldn't work.
Clang is a bit more pedantic than GCC when diagnosing implicit
fallthroughs, and doesn't care if the succeeding label only contains a
single break statement.
The text was painted with the assumption that no other column would be
present after the tree column, which won't always be true. Additionally,
some alignment and focus rect-related issues have been fixed.
Previously in Browser, when we navigate back from a page that has an
icon to a page that does not have an icon, the icon does not update and
the old icon is displayed because FrameLoader does not set the default
favicon when the favicon cannot be loaded. This patch ensures that
Browser receives a new icon bitmap every time a load takes place.
When the preprocessor encounters an #include statement it now adds
the preprocessor definitions that exist in the included header to its
own set of definitions.
We previously only aggregated the definitions from headers after
processing the source, which was less correct. (For example, there
could be an #ifdef that depends on a definition from another header).
We now call Preprocessor::process_and_lex() and pass the result to the
parser.
Doing the lexing in the preprocessor will allow us to maintain the
original position information of tokens after substituting definitions.
length is size_t as returned, and so subtracting from it may cause
underflow. We handle this case by just casting it to a signed value, and
the for loop predicate takes care of the rest.
Problem:
- Clang ToT generates warnings due to user-declared functions causing
the implicitly generated assignment operator to not be generated.
Solution:
- Declare the default constructor `= default`.
- Remove the default copy constructor declaration.
Playing a lossy flac file resulted in hearing something
you'd not like to play. Instead of your lovely bass, you had sounds
as if you put a CD-ROM disc to a CD player.
It turned out that the size for making signed values was too big,
making all the values unsigned.
I've used lossyWav[1] (the posix port[2] to be exact)
to generate such files.
[1]: https://wiki.hydrogenaud.io/index.php?title=LossyWAV
[2]: https://github.com/MoSal/lossywav-for-posix
Prior this change, decoding fixed subframes produced "unpleasant
crackling noices".
While the type doesn't appear so often when using the default settings,
encoding files in flac(1) with --fast option uses fixed subframes
almost every time.
This also applies the logic to the constant subframes,
which isn't so important, as the type is generally for the silence,
but let's use it as well to avoid inconsistency.
ValueSlider is a more generalized version of OpacitySlider when we need
a slider with values displayed. It will always show the current value
with a user defined suffix.
Most of the models were just calling did_update anyway, which is
pointless since it can be unified to the base Model class. Instead, code
calling update() will now call invalidate(), which functions identically
and is more obvious in what it does.
Additionally, a default implementation is provided, which removes the
need to add empty implementations of update() for each model subclass.
Co-Authored-By: Ali Mohammad Pur <ali.mpfard@gmail.com>
This is a simple wrapper around posix_spawn() that will help us simplify
a bunch of very verbose posix_spawn() invocations.
This first version only supports the simplest case: executing an
executable without passing arguments or doing anything fancy. More
features can be added to cover more cases. :^)
