--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CSP2/CSP2_env/env-d9b9114564458d9d-741b3de822f2aaca6c6caa4325c4afce/lib/python3.8/site-packages/wheel/wheelfile.py	Tue Mar 18 17:55:14 2025 -0400
@@ -0,0 +1,227 @@
+from __future__ import annotations
+
+import csv
+import hashlib
+import os.path
+import re
+import stat
+import time
+from io import StringIO, TextIOWrapper
+from typing import IO, TYPE_CHECKING, Literal
+from zipfile import ZIP_DEFLATED, ZipFile, ZipInfo
+
+from wheel.cli import WheelError
+from wheel.util import log, urlsafe_b64decode, urlsafe_b64encode
+
+if TYPE_CHECKING:
+    from typing import Protocol, Sized, Union
+
+    from typing_extensions import Buffer
+
+    StrPath = Union[str, os.PathLike[str]]
+
+    class SizedBuffer(Sized, Buffer, Protocol): ...
+
+
+# Non-greedy matching of an optional build number may be too clever (more
+# invalid wheel filenames will match). Separate regex for .dist-info?
+WHEEL_INFO_RE = re.compile(
+    r"""^(?P<namever>(?P<name>[^\s-]+?)-(?P<ver>[^\s-]+?))(-(?P<build>\d[^\s-]*))?
+     -(?P<pyver>[^\s-]+?)-(?P<abi>[^\s-]+?)-(?P<plat>\S+)\.whl$""",
+    re.VERBOSE,
+)
+MINIMUM_TIMESTAMP = 315532800  # 1980-01-01 00:00:00 UTC
+
+
+def get_zipinfo_datetime(timestamp: float | None = None):
+    # Some applications need reproducible .whl files, but they can't do this without
+    # forcing the timestamp of the individual ZipInfo objects. See issue #143.
+    timestamp = int(os.environ.get("SOURCE_DATE_EPOCH", timestamp or time.time()))
+    timestamp = max(timestamp, MINIMUM_TIMESTAMP)
+    return time.gmtime(timestamp)[0:6]
+
+
+class WheelFile(ZipFile):
+    """A ZipFile derivative class that also reads SHA-256 hashes from
+    .dist-info/RECORD and checks any read files against those.
+    """
+
+    _default_algorithm = hashlib.sha256
+
+    def __init__(
+        self,
+        file: StrPath,
+        mode: Literal["r", "w", "x", "a"] = "r",
+        compression: int = ZIP_DEFLATED,
+    ):
+        basename = os.path.basename(file)
+        self.parsed_filename = WHEEL_INFO_RE.match(basename)
+        if not basename.endswith(".whl") or self.parsed_filename is None:
+            raise WheelError(f"Bad wheel filename {basename!r}")
+
+        ZipFile.__init__(self, file, mode, compression=compression, allowZip64=True)
+
+        self.dist_info_path = "{}.dist-info".format(
+            self.parsed_filename.group("namever")
+        )
+        self.record_path = self.dist_info_path + "/RECORD"
+        self._file_hashes: dict[str, tuple[None, None] | tuple[int, bytes]] = {}
+        self._file_sizes = {}
+        if mode == "r":
+            # Ignore RECORD and any embedded wheel signatures
+            self._file_hashes[self.record_path] = None, None
+            self._file_hashes[self.record_path + ".jws"] = None, None
+            self._file_hashes[self.record_path + ".p7s"] = None, None
+
+            # Fill in the expected hashes by reading them from RECORD
+            try:
+                record = self.open(self.record_path)
+            except KeyError:
+                raise WheelError(f"Missing {self.record_path} file") from None
+
+            with record:
+                for line in csv.reader(
+                    TextIOWrapper(record, newline="", encoding="utf-8")
+                ):
+                    path, hash_sum, size = line
+                    if not hash_sum:
+                        continue
+
+                    algorithm, hash_sum = hash_sum.split("=")
+                    try:
+                        hashlib.new(algorithm)
+                    except ValueError:
+                        raise WheelError(
+                            f"Unsupported hash algorithm: {algorithm}"
+                        ) from None
+
+                    if algorithm.lower() in {"md5", "sha1"}:
+                        raise WheelError(
+                            f"Weak hash algorithm ({algorithm}) is not permitted by "
+                            f"PEP 427"
+                        )
+
+                    self._file_hashes[path] = (
+                        algorithm,
+                        urlsafe_b64decode(hash_sum.encode("ascii")),
+                    )
+
+    def open(
+        self,
+        name_or_info: str | ZipInfo,
+        mode: Literal["r", "w"] = "r",
+        pwd: bytes | None = None,
+    ) -> IO[bytes]:
+        def _update_crc(newdata: bytes) -> None:
+            eof = ef._eof
+            update_crc_orig(newdata)
+            running_hash.update(newdata)
+            if eof and running_hash.digest() != expected_hash:
+                raise WheelError(f"Hash mismatch for file '{ef_name}'")
+
+        ef_name = (
+            name_or_info.filename if isinstance(name_or_info, ZipInfo) else name_or_info
+        )
+        if (
+            mode == "r"
+            and not ef_name.endswith("/")
+            and ef_name not in self._file_hashes
+        ):
+            raise WheelError(f"No hash found for file '{ef_name}'")
+
+        ef = ZipFile.open(self, name_or_info, mode, pwd)
+        if mode == "r" and not ef_name.endswith("/"):
+            algorithm, expected_hash = self._file_hashes[ef_name]
+            if expected_hash is not None:
+                # Monkey patch the _update_crc method to also check for the hash from
+                # RECORD
+                running_hash = hashlib.new(algorithm)
+                update_crc_orig, ef._update_crc = ef._update_crc, _update_crc
+
+        return ef
+
+    def write_files(self, base_dir: str):
+        log.info(f"creating '{self.filename}' and adding '{base_dir}' to it")
+        deferred: list[tuple[str, str]] = []
+        for root, dirnames, filenames in os.walk(base_dir):
+            # Sort the directory names so that `os.walk` will walk them in a
+            # defined order on the next iteration.
+            dirnames.sort()
+            for name in sorted(filenames):
+                path = os.path.normpath(os.path.join(root, name))
+                if os.path.isfile(path):
+                    arcname = os.path.relpath(path, base_dir).replace(os.path.sep, "/")
+                    if arcname == self.record_path:
+                        pass
+                    elif root.endswith(".dist-info"):
+                        deferred.append((path, arcname))
+                    else:
+                        self.write(path, arcname)
+
+        deferred.sort()
+        for path, arcname in deferred:
+            self.write(path, arcname)
+
+    def write(
+        self,
+        filename: str,
+        arcname: str | None = None,
+        compress_type: int | None = None,
+    ) -> None:
+        with open(filename, "rb") as f:
+            st = os.fstat(f.fileno())
+            data = f.read()
+
+        zinfo = ZipInfo(
+            arcname or filename, date_time=get_zipinfo_datetime(st.st_mtime)
+        )
+        zinfo.external_attr = (stat.S_IMODE(st.st_mode) | stat.S_IFMT(st.st_mode)) << 16
+        zinfo.compress_type = compress_type or self.compression
+        self.writestr(zinfo, data, compress_type)
+
+    def writestr(
+        self,
+        zinfo_or_arcname: str | ZipInfo,
+        data: SizedBuffer | str,
+        compress_type: int | None = None,
+    ):
+        if isinstance(zinfo_or_arcname, str):
+            zinfo_or_arcname = ZipInfo(
+                zinfo_or_arcname, date_time=get_zipinfo_datetime()
+            )
+            zinfo_or_arcname.compress_type = self.compression
+            zinfo_or_arcname.external_attr = (0o664 | stat.S_IFREG) << 16
+
+        if isinstance(data, str):
+            data = data.encode("utf-8")
+
+        ZipFile.writestr(self, zinfo_or_arcname, data, compress_type)
+        fname = (
+            zinfo_or_arcname.filename
+            if isinstance(zinfo_or_arcname, ZipInfo)
+            else zinfo_or_arcname
+        )
+        log.info(f"adding '{fname}'")
+        if fname != self.record_path:
+            hash_ = self._default_algorithm(data)
+            self._file_hashes[fname] = (
+                hash_.name,
+                urlsafe_b64encode(hash_.digest()).decode("ascii"),
+            )
+            self._file_sizes[fname] = len(data)
+
+    def close(self):
+        # Write RECORD
+        if self.fp is not None and self.mode == "w" and self._file_hashes:
+            data = StringIO()
+            writer = csv.writer(data, delimiter=",", quotechar='"', lineterminator="\n")
+            writer.writerows(
+                (
+                    (fname, algorithm + "=" + hash_, self._file_sizes[fname])
+                    for fname, (algorithm, hash_) in self._file_hashes.items()
+                )
+            )
+            writer.writerow((format(self.record_path), "", ""))
+            self.writestr(self.record_path, data.getvalue())
+
+        ZipFile.close(self)