`get_printable_len` returned a float for UTF-16 LE operands due to `/`
instead of `//`, violating the `-> int` annotation and silently
propagating a float into `_bb_has_stackstring`'s accumulator. Aligns
with the IDA extractor equivalent.
Closes SURF-58
`get_file_taste` opened a file handle with `sample_path.open("rb").read(8)`,
discarding the file object without explicitly closing it. CPython reference-
counting closes it promptly in practice, but other implementations (PyPy,
Jython) and CPython under GC pressure may defer closure. Use a `with` statement
to guarantee the handle is released immediately after reading.
`functools.lru_cache` has been in the standard library since Python 3.2.
The project requires Python >=3.10, so the `except ImportError` branch
importing `backports.functools_lru_cache` can never execute.
Remove the try/except block and keep only the direct stdlib import.
Also remove `types-backports` from dev dependencies, `backports` from
`[tool.deptry.known_first_party]`, and `types-backports` from the
DEP002 ignore list in `pyproject.toml`.
EXTENSIONS_ELF = "elf_" was defined but never used: get_format_from_extension
had branches for every other EXTENSIONS_* constant except ELF. Since .elf_
files are real test fixtures and a recognised input format, the fix is to add
the missing elif branch (and import FORMAT_ELF) rather than delete the
constant.
Closes#3031
Replace the header from source code files using the following script:
```Python
for dir_path, dir_names, file_names in os.walk("capa"):
for file_name in file_names:
# header are only in `.py` and `.toml` files
if file_name[-3:] not in (".py", "oml"):
continue
file_path = f"{dir_path}/{file_name}"
f = open(file_path, "rb+")
content = f.read()
m = re.search(OLD_HEADER, content)
if not m:
continue
print(f"{file_path}: {m.group('year')}")
content = content.replace(m.group(0), NEW_HEADER % m.group("year"))
f.seek(0)
f.write(content)
```
Some files had the copyright headers inside a `"""` comment and needed
manual changes before applying the script. `hook-vivisect.py` and
`pyinstaller.spec` didn't include the license in the header and also
needed manual changes.
The old header had the confusing sentence `All rights reserved`, which
does not make sense for an open source license. Replace the header by
the default Google header that corrects this issue and keep capa
consistent with other Google projects.
Adapt the linter to work with the new header.
Replace also the copyright text in the `web/public/index.html` file for
consistency.
