Class BareAllocationChecker

ci/lint_cpp/bare_allocation_checker.py:83–193

Checker for bare new/delete/malloc/calloc/realloc/free usage.

class BareAllocationChecker(FileContentChecker):
    """Checker for bare new/delete/malloc/calloc/realloc/free usage."""

    def __init__(self) -> None:
        self.violations: dict[str, list[tuple[int, str]]] = {}

    def should_process_file(self, file_path: str) -> bool:
        if not file_path.endswith((".cpp", ".h", ".hpp", ".ino", ".cpp.hpp")):
            return False

        if any(file_path.endswith(excluded) for excluded in EXCLUDED_FILES):
            return False

        if "third_party" in file_path or "thirdparty" in file_path:
            return False

        normalized = file_path.replace("\\", "/")
        if any(normalized.endswith(suffix) for suffix in _WHITELISTED_SUFFIXES):
            return False

        return True

    def check_file_content(self, file_content: FileContent) -> list[str]:
        violations: list[tuple[int, str]] = []
        in_multiline_comment = False

        for line_number, line in enumerate(file_content.lines, 1):
            stripped = line.strip()

            # Track multi-line comment state
            if "/*" in line:
                in_multiline_comment = True
            if "*/" in line:
                in_multiline_comment = False
                continue

            if in_multiline_comment:
                continue

            # Skip single-line comment lines
            if stripped.startswith("//"):
                continue

            # Check for suppression comment on this line
            if _SUPPRESSION_OK in line or _SUPPRESSION_OKAY in line:
                continue

            # Fast first pass: skip expensive regex/string-strip if line contains
            # none of the allocation keywords (allows false positives, no false negatives)
            if not (
                "new" in line
                or "delete" in line
                or "malloc" in line
                or "calloc" in line
                or "realloc" in line
                or "free" in line
            ):
                continue