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We had some inconsistencies before:
- Sometimes "The", sometimes "the"
- Sometimes trailing ".", sometimes no trailing "."
I picked the most common one (lowecase "the", trailing ".") and applied
it to all copyright headers.
By using the exact same string everywhere we can ensure nothing gets
missed during a global search (and replace), and that these
inconsistencies are not spread any further (as copyright headers are
commonly copied to new files).
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As many macros as possible are moved to Macros.h, while the
macros to create a test case are moved to TestCase.h. TestCase is now
the only user-facing header for creating a test case. TestSuite and its
helpers have moved into a .cpp file. Instead of requiring a TEST_MAIN
macro to be instantiated into the test file, a TestMain.cpp file is
provided instead that will be linked against each test. This has the
side effect that, if we wanted to have test cases split across multiple
files, it's as simple as adding them all to the same executable.
The test main should be portable to kernel mode as well, so if
there's a set of tests that should be run in self-test mode in kernel
space, we can accomodate that.
A new serenity_test CMake function streamlines adding a new test with
arguments for the test source file, subdirectory under /usr/Tests to
install the test application and an optional list of libraries to link
against the test application. To accomodate future test where the
provided TestMain.cpp is not suitable (e.g. test-js), a CUSTOM_MAIN
parameter can be passed to the function to not link against the
boilerplate main function.
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SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
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Move LibCompress unit tests to LibCompress/Tests directory and register
them with CMake's add_test. This allows us to run these tests with
ninja test instead of running a separate executable.
Also split the existing tests in 3 test files that better follow the
source code structure (inspired by AK tests).
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This way a gzip compressed file that contains a large amount of small
blocks wont cause a stack overflow.
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This way a deflate blob that contains a large amount of small blocks
wont cause a stack overflow.
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This commit makes sure that we fail if an encoded lz77 back reference
references bytes that are outside our sliding window, instead of just
silently failing, which triggers an assertion down the line.
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Since we were not checking for error flags set by read_bits we would
just always read 0 as the bits' value, which in some edge cases could
lead to an infinite loop.
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We now read the header into a temporary header byte array that is used
as the header once its filled up by the input stream, instead of just
ending the stream if we are out of bytes mid header.
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This commit makes read short-circuit if its input stream errored,
as well as propagate error handling to wrapped sub streams, similarly
to DeflateDecompressor.
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In the case that both the stream and the wrapped substream had errors
to be handled only one of the two would be resolved due to boolean
short circuiting. this commit ensures both are handled irregardless
of one another.
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This ensures that when a DeflateCompressor stream is cleared of any
errors its underlying wrapped streams (InputBitStream/InputMemoryStream)
will be cleared as well and wont fail a VERIFY on destruction.
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This commit adds a verify-less try_create method to the Zlib
decompressor to allow for graceful failures of parsing the
Zlib headers.
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This commit stores the bit codes as u16s instead of u32s as the
maximum code bit length in DEFLATE is 15.
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Very incompressible data could sometimes produce no backreferences
which would result in no distance huffman code being created (as it
was not needed), so VERIFY the code exists only if it is actually
needed for writing the stream.
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This is just a bit easier on the eyes :^)
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This commit implements a stream compressor for the gzip
specification (RFC 1952), which is essentially a thin
wrapper around the DEFLATE compression format.
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This commit adds a fully functional DEFLATE compression
implementation that can be used to implement compression
for higher level formats like gzip, zlib or zip.
A large part of this commit is based on Hans Wennborg's
great article about the DEFLATE and zip specifications:
https://www.hanshq.net/zip.html
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Good-bye LogStream. Long live AK::Format!
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This commit removes the only 3rd party library (and its usages)
in serenity: puff, which is used for deflate decompression. and
replaces it with the existing original serenity implementation
in LibCompress. :^)
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This is basically just for consistency, it's quite strange to see
multiple AK container types next to each other, some with and some
without the namespace prefix - we're 'using AK::Foo;' a lot and should
leverage that. :^)
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(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED)
Since all of these checks are done in release builds as well,
let's rename them to VERIFY to prevent confusion, as everyone is
used to assertions being compiled out in release.
We can introduce a new ASSERT macro that is specifically for debug
checks, but I'm doing this wholesale conversion first since we've
accumulated thousands of these already, and it's not immediately
obvious which ones are suitable for ASSERT.
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