zip 8.5.1

//! Writing a ZIP archive

use crate::compression::CompressionMethod;
use crate::datetime::DateTime;
use crate::extra_fields::AexEncryption;
use crate::extra_fields::UsedExtraField;
use crate::extra_fields::Zip64ExtendedInformation;
use crate::read::{Config, ZipArchive, ZipFile, parse_single_extra_field};
use crate::result::{ZipError, ZipResult, invalid};
use crate::spec::{self, FixedSizeBlock, Magic, Pod, Zip32CDEBlock, ZipLocalEntryBlock};
use crate::types::{AesVendorVersion, MIN_VERSION, System, ZipFileData, ZipRawValues, ffi};
use core::default::Default;
use core::fmt::{Debug, Formatter};
use core::marker::PhantomData;
use core::mem::{self, offset_of, size_of};
use core::str::{Utf8Error, from_utf8};
use crc32fast::Hasher;
use indexmap::IndexMap;
use std::borrow::ToOwned;
use std::io::{self, Read, Seek, Write};
use std::io::{BufReader, SeekFrom};
use std::io::{Cursor, ErrorKind};
use std::path::Path;
use std::sync::Arc;

// re-export from types
pub use crate::types::{FileOptions, SimpleFileOptions};

#[allow(clippy::large_enum_variant)]
enum MaybeEncrypted<W> {
    Unencrypted(W),
    #[cfg(feature = "aes-crypto")]
    Aes(crate::aes::AesWriter<W>),
    ZipCrypto(crate::zipcrypto::ZipCryptoWriter<W>),
}

impl<W: Write> MaybeEncrypted<W> {
    fn get_ref(&self) -> &W {
        match self {
            MaybeEncrypted::Unencrypted(w) => w,
            #[cfg(feature = "aes-crypto")]
            MaybeEncrypted::Aes(w) => w.get_ref(),
            MaybeEncrypted::ZipCrypto(w) => w.get_ref(),
        }
    }
    unsafe fn get_mut(&mut self) -> &mut W {
        match self {
            MaybeEncrypted::Unencrypted(w) => w,
            #[cfg(feature = "aes-crypto")]
            MaybeEncrypted::Aes(w) => unsafe { w.get_mut() },
            MaybeEncrypted::ZipCrypto(w) => w.get_mut(),
        }
    }
}

impl<W> Debug for MaybeEncrypted<W> {
    fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
        // Don't print W, since it may be a huge Vec<u8>
        f.write_str(match self {
            MaybeEncrypted::Unencrypted(_) => "Unencrypted",
            #[cfg(feature = "aes-crypto")]
            MaybeEncrypted::Aes(_) => "AES",
            MaybeEncrypted::ZipCrypto(_) => "ZipCrypto",
        })
    }
}

impl<W: Write> Write for MaybeEncrypted<W> {
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        match self {
            MaybeEncrypted::Unencrypted(w) => w.write(buf),
            #[cfg(feature = "aes-crypto")]
            MaybeEncrypted::Aes(w) => w.write(buf),
            MaybeEncrypted::ZipCrypto(w) => w.write(buf),
        }
    }
    fn flush(&mut self) -> io::Result<()> {
        match self {
            MaybeEncrypted::Unencrypted(w) => w.flush(),
            #[cfg(feature = "aes-crypto")]
            MaybeEncrypted::Aes(w) => w.flush(),
            MaybeEncrypted::ZipCrypto(w) => w.flush(),
        }
    }
}

#[allow(clippy::large_enum_variant)]
enum GenericZipWriter<W: Write + Seek> {
    Closed,
    Storer(MaybeEncrypted<W>),
    #[cfg(feature = "deflate-flate2")]
    Deflater(flate2::write::DeflateEncoder<MaybeEncrypted<W>>),
    #[cfg(feature = "deflate-zopfli")]
    ZopfliDeflater(zopfli::DeflateEncoder<MaybeEncrypted<W>>),
    #[cfg(feature = "deflate-zopfli")]
    BufferedZopfliDeflater(std::io::BufWriter<zopfli::DeflateEncoder<MaybeEncrypted<W>>>),
    #[cfg(feature = "_bzip2_any")]
    Bzip2(bzip2::write::BzEncoder<MaybeEncrypted<W>>),
    #[cfg(feature = "zstd")]
    Zstd(zstd::stream::write::Encoder<'static, MaybeEncrypted<W>>),
    #[cfg(feature = "xz")]
    Xz(Box<lzma_rust2::XzWriter<MaybeEncrypted<W>>>),
    #[cfg(feature = "ppmd")]
    Ppmd(Box<ppmd_rust::Ppmd8Encoder<MaybeEncrypted<W>>>),
}

impl<W: Write + Seek> Debug for GenericZipWriter<W> {
    fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
        match self {
            Self::Closed => f.write_str("Closed"),
            Self::Storer(w) => f.write_fmt(format_args!("Storer({w:?})")),
            #[cfg(feature = "deflate-flate2")]
            Self::Deflater(w) => f.write_fmt(format_args!("Deflater({:?})", w.get_ref())),
            #[cfg(feature = "deflate-zopfli")]
            Self::ZopfliDeflater(_) => f.write_str("ZopfliDeflater"),
            #[cfg(feature = "deflate-zopfli")]
            Self::BufferedZopfliDeflater(_) => f.write_str("BufferedZopfliDeflater"),
            #[cfg(feature = "_bzip2_any")]
            Self::Bzip2(w) => f.write_fmt(format_args!("Bzip2({:?})", w.get_ref())),
            #[cfg(feature = "zstd")]
            Self::Zstd(w) => f.write_fmt(format_args!("Zstd({:?})", w.get_ref())),
            #[cfg(feature = "xz")]
            Self::Xz(w) => f.write_fmt(format_args!("Xz({:?})", w.inner())),
            #[cfg(feature = "ppmd")]
            Self::Ppmd(_) => f.write_fmt(format_args!("Ppmd8Encoder")),
        }
    }
}

// Put the struct declaration in a private module to convince rustdoc to display ZipWriter nicely
pub(crate) mod zip_writer {
    use crate::{
        types::ZipFileData,
        write::{GenericZipWriter, ZipWriterStats},
    };
    use core::fmt::{Debug, Formatter};
    use indexmap::IndexMap;
    use std::io::{Seek, Write};

    /// ZIP archive generator
    ///
    /// Handles the bookkeeping involved in building an archive, and provides an
    /// API to edit its contents.
    ///
    /// ```
    /// # fn doit() -> zip::result::ZipResult<()>
    /// # {
    /// use zip::ZipWriter;
    /// use std::io::Write;
    /// use zip::write::SimpleFileOptions;
    ///
    /// // We use a cursor + vec here, though you'd normally use a `File`
    /// let mut cursor = std::io::Cursor::new(Vec::new());
    /// let mut archive = ZipWriter::new(&mut cursor);
    ///
    /// let options = SimpleFileOptions::default().compression_method(zip::CompressionMethod::Stored);
    /// archive.start_file("hello_world.txt", options)?;
    /// archive.write(b"Hello, World!")?;
    /// // also direct write with
    /// // std::io::copy(&mut file, &mut zip)?;
    ///
    /// // Apply the changes you've made.
    /// // Dropping the `ZipWriter` will have the same effect, but may silently fail
    /// archive.finish()?;
    ///
    /// // raw zip data is available as a Vec<u8>
    /// let zip_bytes = cursor.into_inner();
    ///
    /// # Ok(())
    /// # }
    /// # doit().unwrap();
    /// ```
    pub struct ZipWriter<W: Write + Seek> {
        pub(super) inner: GenericZipWriter<W>,
        pub(super) files: IndexMap<Box<str>, ZipFileData>,
        pub(super) stats: ZipWriterStats,
        pub(super) writing_to_file: bool,
        pub(super) writing_raw: bool,
        pub(super) comment: Box<[u8]>,
        pub(super) zip64_extensible_data_sector: Option<Box<[u8]>>,
        pub(super) flush_on_finish_file: bool,
        pub(super) seek_possible: bool,
        pub(crate) auto_large_file: bool,
    }

    impl<W: Write + Seek> Debug for ZipWriter<W> {
        fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
            f.write_fmt(format_args!(
                "ZipWriter {{files: {:?}, stats: {:?}, writing_to_file: {}, writing_raw: {}, comment: {:?}, flush_on_finish_file: {}}}",
                self.files, self.stats, self.writing_to_file, self.writing_raw,
                self.comment, self.flush_on_finish_file))
        }
    }

    impl<W: Write + Seek> ZipWriter<W> {
        /// Gets a reference to the underlying writer in this `ZipWriter`.
        pub fn get_ref(&self) -> Option<&W> {
            match &self.inner {
                GenericZipWriter::Closed => None,
                GenericZipWriter::Storer(w) => Some(w.get_ref()),
                #[cfg(feature = "deflate-flate2")]
                GenericZipWriter::Deflater(w) => Some(w.get_ref().get_ref()),
                #[cfg(feature = "deflate-zopfli")]
                GenericZipWriter::ZopfliDeflater(w) => Some(w.get_ref().get_ref()),
                #[cfg(feature = "deflate-zopfli")]
                GenericZipWriter::BufferedZopfliDeflater(w) => {
                    Some(w.get_ref().get_ref().get_ref())
                }
                #[cfg(feature = "_bzip2_any")]
                GenericZipWriter::Bzip2(w) => Some(w.get_ref().get_ref()),
                #[cfg(feature = "zstd")]
                GenericZipWriter::Zstd(w) => Some(w.get_ref().get_ref()),
                #[cfg(feature = "xz")]
                GenericZipWriter::Xz(w) => Some(w.inner().get_ref()),
                #[cfg(feature = "ppmd")]
                GenericZipWriter::Ppmd(w) => Some(w.get_ref().get_ref()),
            }
        }

        /// Gets a reference to the underlying writer in this `ZipWriter`.
        ///
        /// # Safety
        ///
        /// Caller must not corrupt the archive, and must seek back to the current position
        /// before continuing to write to the `ZipWriter`.
        pub unsafe fn get_mut(&mut self) -> Option<&mut W> {
            unsafe {
                match &mut self.inner {
                    GenericZipWriter::Closed => None,
                    GenericZipWriter::Storer(w) => Some(w.get_mut()),
                    #[cfg(feature = "deflate-flate2")]
                    GenericZipWriter::Deflater(w) => Some(w.get_mut().get_mut()),
                    #[cfg(feature = "deflate-zopfli")]
                    GenericZipWriter::ZopfliDeflater(w) => Some(w.get_mut().get_mut()),
                    #[cfg(feature = "deflate-zopfli")]
                    GenericZipWriter::BufferedZopfliDeflater(w) => {
                        Some(w.get_mut().get_mut().get_mut())
                    }
                    #[cfg(feature = "_bzip2_any")]
                    GenericZipWriter::Bzip2(w) => Some(w.get_mut().get_mut()),
                    #[cfg(feature = "zstd")]
                    GenericZipWriter::Zstd(w) => Some(w.get_mut().get_mut()),
                    #[cfg(feature = "xz")]
                    GenericZipWriter::Xz(w) => Some(w.inner_mut().get_mut()),
                    #[cfg(feature = "ppmd")]
                    GenericZipWriter::Ppmd(w) => Some(w.get_mut().get_mut()),
                }
            }
        }
    }
}
#[doc(inline)]
pub use self::sealed::FileOptionExtension;
use crate::CompressionMethod::Stored;
use crate::result::ZipError::UnsupportedArchive;
use crate::unstable::LittleEndianWriteExt;
use crate::unstable::path_to_string;
use crate::zipcrypto::{CHUNK_SIZE, EncryptWith, ZipCryptoKeys};
pub use zip_writer::ZipWriter;

#[derive(Default, Debug)]
struct ZipWriterStats {
    hasher: Hasher,
    start: u64,
    bytes_written: u64,
}

mod sealed {
    use std::sync::Arc;

    use super::ExtendedFileOptions;

    pub trait Sealed {}
    /// File options Extensions
    #[doc(hidden)]
    pub trait FileOptionExtension: Default + Sealed {
        /// Extra Data
        fn extra_data(&self) -> Option<&Arc<Vec<u8>>>;
        /// Central Extra Data
        fn central_extra_data(&self) -> Option<&Arc<Vec<u8>>>;
        /// File Comment
        fn file_comment(&self) -> Option<&str>;
        /// Take File Comment (moves ownership)
        fn take_file_comment(&mut self) -> Option<Box<str>>;
    }
    impl Sealed for () {}
    impl FileOptionExtension for () {
        fn extra_data(&self) -> Option<&Arc<Vec<u8>>> {
            None
        }
        fn central_extra_data(&self) -> Option<&Arc<Vec<u8>>> {
            None
        }
        fn file_comment(&self) -> Option<&str> {
            None
        }
        fn take_file_comment(&mut self) -> Option<Box<str>> {
            None
        }
    }
    impl Sealed for ExtendedFileOptions {}

    impl FileOptionExtension for ExtendedFileOptions {
        fn extra_data(&self) -> Option<&Arc<Vec<u8>>> {
            Some(&self.extra_data)
        }
        fn central_extra_data(&self) -> Option<&Arc<Vec<u8>>> {
            Some(&self.central_extra_data)
        }
        fn file_comment(&self) -> Option<&str> {
            self.file_comment.as_ref().map(Box::as_ref)
        }
        fn take_file_comment(&mut self) -> Option<Box<str>> {
            self.file_comment.take()
        }
    }
}

/// Adds Extra Data and Central Extra Data. It does not implement copy.
pub type FullFileOptions<'k> = FileOptions<'k, ExtendedFileOptions>;
/// The Extension for Extra Data and Central Extra Data
#[cfg_attr(feature = "_arbitrary", derive(arbitrary::Arbitrary))]
#[derive(Clone, Default, Eq, PartialEq)]
pub struct ExtendedFileOptions {
    extra_data: Arc<Vec<u8>>,
    central_extra_data: Arc<Vec<u8>>,
    file_comment: Option<Box<str>>,
}

impl ExtendedFileOptions {
    /// Adds an extra data field, unless we detect that it's invalid.
    ///
    /// # Parameters
    ///
    /// * `header_id` – The 2‑byte identifier of the ZIP extra field to add.
    ///   This value determines the type/format of `data` and should either be
    ///   one of the standard ZIP extra field IDs defined by the ZIP
    ///   specification or an application‑specific (vendor) ID.
    /// * `data` – The raw payload for the extra field, without the leading
    ///   header ID or length; those are derived from `header_id` and
    ///   `data.len()` and written automatically.
    /// * `central_only` – Controls where the extra field is stored:
    ///   * When `true`, the field is appended only to the central directory
    ///     extra data (`central_extra_data`), and the corresponding local file
    ///     header is left unchanged.
    ///   * When `false`, the field is appended to the local file header extra
    ///     data (`extra_data`) and may also be reflected in the central
    ///     directory, depending on how the ZIP is written.
    ///
    /// The combined size of all extra data (local + central) must not exceed
    /// `u16::MAX`. If adding this field would exceed that limit or produce an
    /// invalid extra data structure, an error is returned and no data is
    /// added.
    pub fn add_extra_data<D: AsRef<[u8]>>(
        &mut self,
        header_id: u16,
        data: D,
        central_only: bool,
    ) -> ZipResult<()> {
        let data = data.as_ref();
        let len = data.len() + 4;
        let local_extra_data_len = self.extra_data.len();
        let central_extra_data_len = self.central_extra_data.len();
        let field = if central_only {
            &mut self.central_extra_data
        } else {
            &mut self.extra_data
        };
        if local_extra_data_len + central_extra_data_len + len > u16::MAX as usize {
            Err(invalid!("Extra data field would be longer than allowed"))
        } else {
            let vec = Arc::make_mut(field);
            Self::add_extra_data_unchecked(vec, header_id, data)?;
            Self::validate_extra_data(vec, true)?;
            Ok(())
        }
    }

    /// Appends an extra data field to the given buffer without enforcing global size limits.
    ///
    /// Unlike [`ExtendedFileOptions::add_extra_data`], this function:
    /// - Does **not** check that the combined size of local and central extra data fits into
    ///   `u16::MAX` bytes as required by the ZIP format.
    /// - Does **not** re-validate the entire extra-data block after appending.
    ///
    /// Callers must ensure that:
    /// - Using this function will not cause the overall extra-data length to exceed `u16::MAX`.
    /// - The resulting buffer remains a well-formed sequence of extra fields (or is validated
    ///   later with [`Self::validate_extra_data`]).
    pub(crate) fn add_extra_data_unchecked(
        vec: &mut Vec<u8>,
        header_id: u16,
        data: &[u8],
    ) -> Result<(), ZipError> {
        vec.reserve_exact(data.len() + size_of::<u16>() + size_of::<u16>());
        vec.write_u16_le(header_id)?;
        vec.write_u16_le(data.len() as u16)?;
        vec.write_all(data)?;
        Ok(())
    }

    fn validate_extra_data(data: &[u8], disallow_zip64: bool) -> ZipResult<()> {
        let len = data.len() as u64;
        if len == 0 {
            return Ok(());
        }
        if len > u64::from(u16::MAX) {
            return Err(ZipError::Io(io::Error::other(
                "Extra-data field can't exceed u16::MAX bytes",
            )));
        }
        let mut data = Cursor::new(data);
        let mut pos = data.position();
        while pos < len {
            if len - data.position() < 4 {
                return Err(ZipError::Io(io::Error::other(
                    "Extra-data field doesn't have room for ID and length",
                )));
            }
            #[cfg(not(feature = "unreserved"))]
            {
                use crate::{
                    extra_fields::{EXTRA_FIELD_MAPPING, UsedExtraField},
                    unstable::LittleEndianReadExt,
                };
                let header_id = data.read_u16_le()?;
                // Some extra fields are authorized
                if let Err(()) = UsedExtraField::try_from(header_id)
                    && EXTRA_FIELD_MAPPING.contains(&header_id)
                {
                    return Err(ZipError::Io(io::Error::other(format!(
                        "Extra data header ID {header_id:#06} (0x{header_id:x}) \
                            requires crate feature \"unreserved\"",
                    ))));
                }
                data.seek(SeekFrom::Current(-2))?;
            }
            parse_single_extra_field(&mut ZipFileData::default(), &mut data, pos, disallow_zip64)?;
            pos = data.position();
        }
        Ok(())
    }
}

impl Debug for ExtendedFileOptions {
    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), core::fmt::Error> {
        f.write_fmt(format_args!("ExtendedFileOptions {{extra_data: vec!{:?}.into(), central_extra_data: vec!{:?}.into()}}",
        self.extra_data, self.central_extra_data))
    }
}

#[cfg(feature = "_arbitrary")]
impl<'a> arbitrary::Arbitrary<'a> for FileOptions<'a, ExtendedFileOptions> {
    fn arbitrary(u: &mut arbitrary::Unstructured<'a>) -> arbitrary::Result<Self> {
        let mut options = FullFileOptions {
            compression_method: CompressionMethod::arbitrary(u)?,
            compression_level: if bool::arbitrary(u)? {
                Some(u.int_in_range(0..=24)?)
            } else {
                None
            },
            last_modified_time: DateTime::arbitrary(u)?,
            permissions: Option::<u32>::arbitrary(u)?,
            large_file: bool::arbitrary(u)?,
            encrypt_with: Option::<EncryptWith<'_>>::arbitrary(u)?,
            alignment: u16::arbitrary(u)?,
            #[cfg(feature = "deflate-zopfli")]
            zopfli_buffer_size: None,
            ..Default::default()
        };
        #[cfg(feature = "deflate-zopfli")]
        if options.compression_method == CompressionMethod::Deflated && bool::arbitrary(u)? {
            options.zopfli_buffer_size =
                Some(if bool::arbitrary(u)? { 2 } else { 3 } << u.int_in_range(8..=20)?);
        }
        u.arbitrary_loop(Some(0), Some(10), |u| {
            options
                .add_extra_data(
                    u.int_in_range(2..=u16::MAX)?,
                    Box::<[u8]>::arbitrary(u)?,
                    bool::arbitrary(u)?,
                )
                .map_err(|_| arbitrary::Error::IncorrectFormat)?;
            Ok(core::ops::ControlFlow::Continue(()))
        })?;
        ZipWriter::new(Cursor::new(Vec::new()))
            .start_file("", options.clone())
            .map_err(|_| arbitrary::Error::IncorrectFormat)?;
        Ok(options)
    }
}

const DEFAULT_FILE_PERMISSIONS: u32 = 0o644; // rw-r--r-- default for regular files
const DEFAULT_DIR_PERMISSIONS: u32 = 0o755; // rwxr-xr-x default for directories

impl<T: FileOptionExtension> FileOptions<'_, T> {
    pub(crate) fn normalize(&mut self) {
        if !self.last_modified_time.is_valid() {
            self.last_modified_time = FileOptions::<T>::default().last_modified_time;
        }

        *self.permissions.get_or_insert(DEFAULT_FILE_PERMISSIONS) |= ffi::S_IFREG;
    }

    /// Indicates whether this file will be encrypted (whether with AES or `ZipCrypto`).
    pub const fn has_encryption(&self) -> bool {
        #[cfg(feature = "aes-crypto")]
        {
            self.encrypt_with.is_some() || self.aes_mode.is_some()
        }
        #[cfg(not(feature = "aes-crypto"))]
        {
            self.encrypt_with.is_some()
        }
    }

    /// Set the compression method for the new file
    ///
    /// The default is [`CompressionMethod::Deflated`] if it is enabled. If not,
    /// [`CompressionMethod::Bzip2`] is the default if it is enabled. If neither `bzip2` nor `deflate`
    /// is enabled, [`CompressionMethod::Stored`] becomes the default and files are written uncompressed.
    #[must_use]
    pub const fn compression_method(mut self, method: CompressionMethod) -> Self {
        self.compression_method = method;
        self
    }

    /// Set the `system` field for the new file
    ///
    /// If not set, the `zip` crate will use the current system
    #[must_use]
    pub const fn system(mut self, system: System) -> Self {
        self.system = Some(system);
        self
    }

    /// Set the compression level for the new file
    ///
    /// `None` value specifies default compression level.
    ///
    /// Range of values depends on compression method:
    /// * `Deflated`: 10 - 264 for Zopfli, 0 - 9 for other encoders. Default is 24 if Zopfli is the
    ///   only encoder, or 6 otherwise.
    /// * `Bzip2`: 0 - 9. Default is 6
    /// * `Zstd`: -7 - 22, with zero being mapped to default level. Default is 3
    /// * others: only `None` is allowed
    #[must_use]
    pub const fn compression_level(mut self, level: Option<i64>) -> Self {
        self.compression_level = level;
        self
    }

    /// Set the last modified time
    ///
    /// The default is the current timestamp if the 'time' feature is enabled, and 1980-01-01
    /// otherwise
    #[must_use]
    pub const fn last_modified_time(mut self, mod_time: DateTime) -> Self {
        self.last_modified_time = mod_time;
        self
    }

    /// Set the permissions for the new file.
    ///
    /// The format is represented with unix-style permissions.
    /// The default is `0o644`, which represents `rw-r--r--` for files,
    /// and `0o755`, which represents `rwxr-xr-x` for directories.
    ///
    /// This method only preserves the file permissions bits (via a `& 0o777`) and discards
    /// higher file mode bits. So it cannot be used to denote an entry as a directory,
    /// symlink, or other special file type.
    #[must_use]
    pub const fn unix_permissions(mut self, mode: u32) -> Self {
        self.permissions = Some(mode & 0o777);
        self
    }

    /// Set whether the new file's compressed and uncompressed size is less than 4 GiB.
    ///
    /// If set to `false` and the file exceeds the limit, an I/O error is thrown and the file is
    /// aborted. If set to `true`, readers will require ZIP64 support and if the file does not
    /// exceed the limit, 20 B are wasted. The default is `false`.
    #[must_use]
    pub const fn large_file(mut self, large: bool) -> Self {
        self.large_file = large;
        self
    }

    pub(crate) fn with_deprecated_encryption(self, password: &[u8]) -> FileOptions<'static, T> {
        FileOptions {
            encrypt_with: Some(EncryptWith::ZipCrypto(
                ZipCryptoKeys::derive(password),
                PhantomData,
            )),
            ..self
        }
    }

    /// Set the AES encryption parameters.
    /// The `salt` must be at least 8 bytes long for AES-128, and at least 16 bytes long for AES-256.
    /// This method is not recommended, since having a fixed salt is not secure.
    /// Consider using `with_aes_encryption` instead, which uses a random salt and is more secure.
    #[cfg(feature = "aes-crypto")]
    pub fn with_aes_encryption_and_salt(
        self,
        password: &[u8],
        salt: crate::aes::AesSalt,
    ) -> FileOptions<'_, T> {
        FileOptions {
            encrypt_with: Some(EncryptWith::Aes {
                mode: salt.mode(),
                password,
                salt: Some(salt),
            }),
            ..self
        }
    }

    /// Set the AES encryption parameters.
    #[cfg(feature = "aes-crypto")]
    pub fn with_aes_encryption(self, mode: crate::AesMode, password: &str) -> FileOptions<'_, T> {
        self.with_aes_encryption_bytes(mode, password.as_bytes())
    }

    /// Set the AES encryption parameters.
    #[cfg(feature = "aes-crypto")]
    pub fn with_aes_encryption_bytes(
        self,
        mode: crate::AesMode,
        password: &[u8],
    ) -> FileOptions<'_, T> {
        FileOptions {
            encrypt_with: Some(EncryptWith::Aes {
                mode,
                password,
                salt: None,
            }),
            ..self
        }
    }

    /// Sets the size of the buffer used to hold the next block that Zopfli will compress. The
    /// larger the buffer, the more effective the compression, but the more memory is required.
    /// A value of `None` indicates no buffer, which is recommended only when all non-empty writes
    /// are larger than about 32 KiB.
    #[must_use]
    #[cfg(feature = "deflate-zopfli")]
    pub const fn with_zopfli_buffer(mut self, size: Option<usize>) -> Self {
        self.zopfli_buffer_size = size;
        self
    }

    /// Returns the compression level currently set.
    pub const fn get_compression_level(&self) -> Option<i64> {
        self.compression_level
    }
    /// Sets the alignment to the given number of bytes.
    #[must_use]
    pub const fn with_alignment(mut self, alignment: u16) -> Self {
        self.alignment = alignment;
        self
    }
}
impl FileOptions<'_, ExtendedFileOptions> {
    /// Set the file comment.
    #[must_use]
    pub fn with_file_comment<S: Into<Box<str>>>(mut self, comment: S) -> Self {
        self.extended_options.file_comment = Some(comment.into());
        self
    }

    /// Adds an extra data field.
    pub fn add_extra_data<D: AsRef<[u8]>>(
        &mut self,
        header_id: u16,
        data: D,
        central_only: bool,
    ) -> ZipResult<()> {
        self.extended_options
            .add_extra_data(header_id, data, central_only)
    }

    /// Removes the extra data fields.
    #[must_use]
    pub fn clear_extra_data(mut self) -> Self {
        if !self.extended_options.extra_data.is_empty() {
            self.extended_options.extra_data = Arc::new(vec![]);
        }
        if !self.extended_options.central_extra_data.is_empty() {
            self.extended_options.central_extra_data = Arc::new(vec![]);
        }
        self
    }
}
impl FileOptions<'static, ()> {
    /// Constructs a const `FileOptions` object.
    ///
    /// Note: This value is different than the return value of [`FileOptions::default()`]:
    ///
    /// - The `last_modified_time` is [`DateTime::DEFAULT`]. This corresponds to 1980-01-01 00:00:00
    pub const DEFAULT: Self = Self {
        compression_method: CompressionMethod::DEFAULT,
        compression_level: None,
        last_modified_time: DateTime::DEFAULT,
        large_file: false,
        permissions: None,
        encrypt_with: None,
        extended_options: (),
        alignment: 1,
        #[cfg(feature = "deflate-zopfli")]
        zopfli_buffer_size: Some(1 << 15),
        #[cfg(feature = "aes-crypto")]
        aes_mode: None,
        system: None,
    };
}

impl<'k> FileOptions<'k, ()> {
    /// Convert to `FullFileOptions`.
    #[must_use]
    pub fn into_full_options(self) -> FullFileOptions<'k> {
        FileOptions {
            compression_method: self.compression_method,
            compression_level: self.compression_level,
            last_modified_time: self.last_modified_time,
            permissions: self.permissions,
            large_file: self.large_file,
            encrypt_with: self.encrypt_with,
            extended_options: ExtendedFileOptions::default(),
            alignment: self.alignment,
            #[cfg(feature = "deflate-zopfli")]
            zopfli_buffer_size: self.zopfli_buffer_size,
            #[cfg(feature = "aes-crypto")]
            aes_mode: self.aes_mode,
            system: self.system,
        }
    }
}

impl<T: FileOptionExtension> Default for FileOptions<'_, T> {
    /// Construct a new `FileOptions` object
    fn default() -> Self {
        Self {
            compression_method: CompressionMethod::default(),
            compression_level: None,
            last_modified_time: DateTime::default_for_write(),
            permissions: None,
            large_file: false,
            encrypt_with: None,
            extended_options: T::default(),
            alignment: 1,
            #[cfg(feature = "deflate-zopfli")]
            zopfli_buffer_size: Some(1 << 15),
            #[cfg(feature = "aes-crypto")]
            aes_mode: None,
            system: None,
        }
    }
}

impl<W: Write + Seek> Write for ZipWriter<W> {
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        if !self.writing_to_file {
            return Err(io::Error::other("No file has been started"));
        }
        if buf.is_empty() {
            return Ok(0);
        }
        match self.inner.ref_mut() {
            Some(ref mut w) => {
                let write_result = w.write(buf);
                if let Ok(count) = write_result {
                    self.stats.update(&buf[..count]);
                    // Only perform the expensive large-file check when we first cross the threshold.
                    if self.stats.bytes_written > spec::ZIP64_BYTES_THR {
                        let is_large_file = self
                            .files
                            .last()
                            .ok_or_else(|| std::io::Error::other("Cannot get last file"))?
                            .1
                            .large_file;
                        if !is_large_file {
                            return Err(if let Err(e) = self.abort_file() {
                                let abort_io_err: io::Error = e.into();
                                io::Error::new(
                                    abort_io_err.kind(),
                                    format!(
                                        "Large file option has not been set and abort_file() failed: {abort_io_err}"
                                    ),
                                )
                            } else {
                                io::Error::other("Large file option has not been set")
                            });
                        }
                    }
                }
                write_result
            }
            None => Err(io::Error::new(
                io::ErrorKind::BrokenPipe,
                "write(): ZipWriter was already closed",
            )),
        }
    }

    fn flush(&mut self) -> io::Result<()> {
        match self.inner.ref_mut() {
            Some(ref mut w) => w.flush(),
            None => Err(io::Error::new(
                io::ErrorKind::BrokenPipe,
                "flush(): ZipWriter was already closed",
            )),
        }
    }
}

impl ZipWriterStats {
    fn update(&mut self, buf: &[u8]) {
        self.hasher.update(buf);
        self.bytes_written += buf.len() as u64;
    }
}

impl<A: Read + Write + Seek> ZipWriter<A> {
    /// Initializes the archive from an existing ZIP archive, making it ready for append.
    ///
    /// This uses a default configuration to initially read the archive.
    pub fn new_append(readwriter: A) -> ZipResult<ZipWriter<A>> {
        Self::new_append_with_config(Config::default(), readwriter)
    }

    /// Initializes the archive from an existing ZIP archive, making it ready for append.
    ///
    /// This uses the given read configuration to initially read the archive.
    pub fn new_append_with_config(config: Config, mut readwriter: A) -> ZipResult<ZipWriter<A>> {
        readwriter.seek(SeekFrom::Start(0))?;
        let shared = ZipArchive::get_metadata(config, &mut readwriter)?;

        Ok(ZipWriter {
            inner: GenericZipWriter::Storer(MaybeEncrypted::Unencrypted(readwriter)),
            files: shared.files,
            stats: ZipWriterStats::default(),
            writing_to_file: false,
            comment: shared.comment,
            zip64_extensible_data_sector: shared.zip64_extensible_data_sector,
            writing_raw: true, // avoid recomputing the last file's header
            flush_on_finish_file: false,
            seek_possible: true,
            auto_large_file: false,
        })
    }

    /// `flush_on_finish_file` is designed to support a streaming `inner` that may unload flushed
    /// bytes. It flushes a file's header and body once it starts writing another file. A `ZipWriter`
    /// will not try to seek back into where a previous file was written unless
    /// either [`ZipWriter::abort_file`] is called while [`ZipWriter::is_writing_file`] returns
    /// false, or [`ZipWriter::deep_copy_file`] is called. In the latter case, it will only need to
    /// read previously-written files and not overwrite them.
    ///
    /// Note: when using an `inner` that cannot overwrite flushed bytes, do not wrap it in a
    /// [`std::io::BufWriter`], because that has a [`Seek::seek`] method that implicitly calls
    /// [`std::io::BufWriter::flush`], and `ZipWriter` needs to seek backward to update each file's header with
    /// the size and checksum after writing the body.
    ///
    /// This setting is false by default.
    pub fn set_flush_on_finish_file(&mut self, flush_on_finish_file: bool) {
        self.flush_on_finish_file = flush_on_finish_file;
    }
}

impl<A: Read + Write + Seek> ZipWriter<A> {
    /// Adds another copy of a file already in this archive. This will produce a larger but more
    /// widely-compatible archive compared to [`Self::shallow_copy_file`]. Does not copy alignment.
    pub fn deep_copy_file(&mut self, src_name: &str, dest_name: &str) -> ZipResult<()> {
        self.finish_file()?;
        if src_name == dest_name || self.files.contains_key(dest_name) {
            return Err(invalid!("That file already exists"));
        }
        let write_position = self.inner.try_inner_mut()?.stream_position()?;
        let src_index = self.index_by_name(src_name)?;
        let src_data = &mut self.files[src_index];
        let src_data_start = src_data.data_start(self.inner.try_inner_mut()?)?;
        debug_assert!(src_data_start <= write_position);
        let mut compressed_size = src_data.compressed_size;
        if compressed_size > (write_position - src_data_start) {
            compressed_size = write_position - src_data_start;
            src_data.compressed_size = compressed_size;
        }
        let mut reader = BufReader::new(self.inner.try_inner_mut()?);
        reader.seek(SeekFrom::Start(src_data_start))?;
        let mut copy = vec![0; compressed_size as usize];
        reader.take(compressed_size).read_exact(&mut copy)?;
        self.inner
            .try_inner_mut()?
            .seek(SeekFrom::Start(write_position))?;
        let mut new_data = src_data.clone();
        let dest_name_raw = dest_name.as_bytes();
        new_data.file_name = dest_name.into();
        new_data.file_name_raw = dest_name_raw.into();
        new_data.header_start = write_position;
        let extra_data_start = write_position
            + (size_of::<Magic>() + size_of::<ZipLocalEntryBlock>()) as u64
            + new_data.file_name_raw.len() as u64;
        new_data.extra_data_start = Some(extra_data_start);
        if let Some(extra) = &src_data.extra_field {
            let stripped = strip_alignment_extra_field(extra, false);
            if stripped.is_empty() {
                new_data.extra_field = None;
            } else {
                new_data.extra_field = Some(Arc::from(stripped.into_boxed_slice()));
            }
        }

        let mut data_start = extra_data_start;
        if let Some(extra) = &new_data.extra_field {
            data_start += extra.len() as u64;
        }
        new_data.data_start.take();
        new_data.data_start.get_or_init(|| data_start);
        new_data.central_header_start = 0;
        let block = new_data.local_block()?;
        let index = self.insert_file_data(new_data)?;
        let new_data = &self.files[index];
        let result: io::Result<()> = {
            let plain_writer = self.inner.try_inner_mut()?;
            block.write(plain_writer)?;
            plain_writer.write_all(&new_data.file_name_raw)?;
            if let Some(data) = &new_data.extra_field {
                plain_writer.write_all(data)?;
            }
            debug_assert_eq!(data_start, plain_writer.stream_position()?);
            self.writing_to_file = true;
            plain_writer.write_all(&copy)?;
            if self.flush_on_finish_file {
                plain_writer.flush()?;
            }
            Ok(())
        };
        self.ok_or_abort_file(result)?;
        self.writing_to_file = false;
        Ok(())
    }

    /// Like `deep_copy_file`, but uses Path arguments.
    ///
    /// This function ensures that the '/' path separator is used and normalizes `.` and `..`. It
    /// ignores any `..` or Windows drive letter that would produce a path outside the ZIP file's
    /// root.
    pub fn deep_copy_file_from_path<T: AsRef<Path>, U: AsRef<Path>>(
        &mut self,
        src_path: T,
        dest_path: U,
    ) -> ZipResult<()> {
        let src = path_to_string(src_path)?;
        let dest = path_to_string(dest_path)?;
        self.deep_copy_file(&src, &dest)
    }

    /// Write the zip file into the backing stream, then produce a readable archive of that data.
    ///
    /// This method avoids parsing the central directory records at the end of the stream for
    /// a slight performance improvement over running [`ZipArchive::new()`] on the output of
    /// [`Self::finish()`].
    ///
    ///```
    /// # fn main() -> Result<(), zip::result::ZipError> {
    /// # #[cfg(any(feature = "deflate-flate2", not(feature = "_deflate-any")))]
    /// # {
    /// use std::io::{Cursor, Read, Write};
    /// use zip::{ZipArchive, ZipWriter, write::SimpleFileOptions};
    ///
    /// let buf = Cursor::new(Vec::new());
    /// let mut zip = ZipWriter::new(buf);
    /// let options = SimpleFileOptions::default();
    /// zip.start_file("a.txt", options)?;
    /// zip.write_all(b"hello\n")?;
    ///
    /// let mut zip = zip.finish_into_readable()?;
    /// let mut s: String = String::new();
    /// zip.by_name("a.txt")?.read_to_string(&mut s)?;
    /// assert_eq!(s, "hello\n");
    /// # }
    /// # Ok(())
    /// # }
    ///```
    pub fn finish_into_readable(mut self) -> ZipResult<ZipArchive<A>> {
        let central_start = self.finalize()?;
        let inner = self.close_writer()?;
        let comment = mem::take(&mut self.comment);
        let zip64_extensible_data_sector = mem::take(&mut self.zip64_extensible_data_sector);
        let files = mem::take(&mut self.files);

        Ok(ZipArchive::from_finalized_writer(
            files,
            comment,
            zip64_extensible_data_sector,
            inner,
            central_start,
        ))
    }
}

impl<W: Write + Seek> ZipWriter<W> {
    /// Initializes the archive.
    ///
    /// Before writing to this object, the [`ZipWriter::start_file`] function should be called.
    /// After a successful write, the file remains open for writing. After a failed write, call
    /// [`ZipWriter::is_writing_file`] to determine if the file remains open.
    pub fn new(inner: W) -> ZipWriter<W> {
        ZipWriter {
            inner: GenericZipWriter::Storer(MaybeEncrypted::Unencrypted(inner)),
            files: IndexMap::new(),
            stats: ZipWriterStats::default(),
            writing_to_file: false,
            writing_raw: false,
            comment: Box::new([]),
            zip64_extensible_data_sector: None,
            flush_on_finish_file: false,
            seek_possible: true,
            auto_large_file: false,
        }
    }

    /// Set automatically large file to true if needed
    #[must_use]
    pub fn set_auto_large_file(mut self) -> Self {
        self.auto_large_file = true;
        self
    }

    /// Returns true if a file is currently open for writing.
    pub const fn is_writing_file(&self) -> bool {
        self.writing_to_file && !self.inner.is_closed()
    }

    /// Set ZIP archive comment.
    pub fn set_comment<S>(&mut self, comment: S) -> ZipResult<()>
    where
        S: Into<Box<str>>,
    {
        self.set_raw_comment(comment.into().into_boxed_bytes())
    }

    /// Set raw ZIP archive comment.
    ///
    /// This sets the raw bytes of the comment.
    /// The comment is typically expected to be encoded in UTF-8.
    /// If the comment is more than `u16::MAX` it will be truncated
    pub fn set_raw_comment(&mut self, comment: Box<[u8]>) -> ZipResult<()> {
        let max_comment_len = u16::MAX as usize; // 65,535
        if comment.len() <= max_comment_len {
            self.comment = comment;
            return Ok(());
        }
        let (allowed, rest) = comment.split_at(max_comment_len);
        self.comment = allowed.into();
        Err(ZipError::Io(std::io::Error::new(
            std::io::ErrorKind::InvalidData,
            format!("Unexpected data comment - {} bytes too long", rest.len()),
        )))
    }

    /// Get ZIP archive comment.
    pub fn get_comment(&mut self) -> Result<&str, Utf8Error> {
        from_utf8(self.get_raw_comment())
    }

    /// Get raw ZIP archive comment.
    ///
    /// This returns the raw bytes of the comment. The comment
    /// is typically expected to be encoded in UTF-8.
    pub const fn get_raw_comment(&self) -> &[u8] {
        &self.comment
    }

    /// Set ZIP64 archive comment.
    #[deprecated(
        note = "Zip64 comment is not part of the zip specification - see https://github.com/zip-rs/zip2/pull/747"
    )]
    pub fn set_zip64_comment<S>(&mut self, comment: Option<S>) -> ZipResult<()>
    where
        S: Into<Box<str>>,
    {
        if let Some(com) = comment {
            self.set_comment(com)?;
        }
        Ok(())
    }

    /// Set raw ZIP64 archive comment.
    ///
    /// This sets the raw bytes of the comment. The comment
    /// is typically expected to be encoded in UTF-8.
    #[deprecated(
        note = "Zip64 comment is not part of the zip specification - see https://github.com/zip-rs/zip2/pull/747"
    )]
    pub fn set_raw_zip64_comment(&mut self, comment: Option<Box<[u8]>>) -> ZipResult<()> {
        if let Some(com) = comment {
            self.set_raw_comment(com)?;
        }
        Ok(())
    }

    /// Get the zip64 extensible data. Use at your own risk
    /// See 4.3.14.3, 4.3.14.4, 4.4.27 and APPENDIX C of the specification
    pub fn set_raw_zip64_extensible_data_sector(&mut self, extensible_data: Box<[u8]>) {
        self.zip64_extensible_data_sector = Some(extensible_data);
    }

    /// Get ZIP64 archive comment.
    #[deprecated(
        note = "Zip64 comment is not part of the zip specification - see https://github.com/zip-rs/zip2/pull/747"
    )]
    pub fn get_zip64_comment(&mut self) -> Option<Result<&str, Utf8Error>> {
        // no-op since deprecated
        None
    }

    /// Get raw ZIP64 archive comment.
    ///
    /// This returns the raw bytes of the comment. The comment
    /// is typically expected to be encoded in UTF-8.
    #[deprecated(
        note = "Zip64 comment is not part of the zip specification - see https://github.com/zip-rs/zip2/pull/747"
    )]
    pub fn get_raw_zip64_comment(&self) -> Option<&[u8]> {
        // no-op since deprecated
        None
    }

    /// Set the file length and crc32 manually.
    ///
    /// # Safety
    ///
    /// This function assumes that `length` and `crc32` accurately describe the data that has
    /// been (or will be) written for the currently open file entry.
    ///
    /// The caller must ensure that:
    /// - A file entry is currently being written (that is, [`Self::start_file`] or equivalent has
    ///   been called successfully and `abort_file` has not been called since).
    /// - `length` is the exact uncompressed size, in bytes, of the file data written to the
    ///   underlying [`Write`] implementation for this entry.
    /// - `crc32` is the correct CRC-32 checksum for that same data, in the format expected by
    ///   the ZIP specification.
    ///
    /// If these requirements are not met, the generated ZIP archive may contain inconsistent
    /// or corrupt metadata, which can cause readers to report errors, skip data, or accept
    /// data whose integrity cannot be verified.
    ///
    /// This overwrites the internal crc32 calculation. It should only be used in case
    /// the underlying [Write] is written independently and you need to adjust the zip metadata.
    pub unsafe fn set_file_metadata(&mut self, length: u64, crc32: u32) -> ZipResult<()> {
        if !self.writing_to_file {
            return Err(ZipError::Io(io::Error::other("No file has been started")));
        }
        self.stats.hasher = Hasher::new_with_initial_len(crc32, length);
        self.stats.bytes_written = length;
        Ok(())
    }

    fn ok_or_abort_file<T, E: Into<ZipError>>(&mut self, result: Result<T, E>) -> ZipResult<T> {
        match result {
            Err(e) => {
                let _ = self.abort_file();
                Err(e.into())
            }
            Ok(t) => Ok(t),
        }
    }

    /// Start a new file for with the requested options.
    fn start_entry<S: ToString, T: FileOptionExtension>(
        &mut self,
        name: &S,
        mut options: FileOptions<'_, T>,
        raw_values: Option<ZipRawValues>,
    ) -> ZipResult<()> {
        self.finish_file()?;

        let header_start = self.inner.try_inner_mut()?.stream_position()?;
        let raw_values = raw_values.unwrap_or(ZipRawValues {
            crc32: 0,
            compressed_size: 0,
            uncompressed_size: 0,
        });

        let mut extra_data = match options.extended_options.extra_data() {
            Some(data) => data.to_vec(),
            None => vec![],
        };
        let central_extra_data = options.extended_options.central_extra_data();
        if let Some(zip64_block) = Zip64ExtendedInformation::new_local(options.large_file) {
            let mut new_extra_data = zip64_block.serialize().into_vec();
            new_extra_data.append(&mut extra_data);
            extra_data = new_extra_data;
        }

        // Figure out the underlying compression_method and aes mode when using
        // AES encryption.
        let (compression_method, aes_mode) = match options.encrypt_with {
            // Preserve AES method for raw copies without needing a password
            #[cfg(feature = "aes-crypto")]
            None if options.aes_mode.is_some() => (CompressionMethod::Aes, options.aes_mode),
            #[cfg(feature = "aes-crypto")]
            Some(EncryptWith::Aes { mode, salt, .. }) => {
                let aes_mode = crate::aes::AesModeOptions::new(
                    mode,
                    AesVendorVersion::Ae2,
                    options.compression_method,
                    salt,
                );
                (CompressionMethod::Aes, Some(aes_mode))
            }
            _ => (options.compression_method, None),
        };

        // Write AES encryption extra data.
        #[allow(unused_mut)]
        let mut aes_extra_data_start = 0;
        #[cfg(feature = "aes-crypto")]
        if let Some(crate::aes::AesModeOptions {
            mode,
            vendor_version,
            actual_compression_method,
            ..
        }) = aes_mode
        {
            // For raw copies of AES entries, write the correct AES extra data immediately
            let aex_extra_field =
                AexEncryption::new(vendor_version, mode, actual_compression_method);
            let buf = &aex_extra_field.as_bytes()[offset_of!(AexEncryption, version)..];
            aes_extra_data_start = extra_data.len() as u64;
            ExtendedFileOptions::add_extra_data_unchecked(
                &mut extra_data,
                UsedExtraField::AeXEncryption.as_u16(),
                buf,
            )?;
        }
        let header_end = header_start
            + (size_of::<Magic>() + size_of::<ZipLocalEntryBlock>()) as u64
            + name.to_string().len() as u64;

        if options.alignment > 1 {
            let extra_data_end = header_end + extra_data.len() as u64;
            let align = u64::from(options.alignment);
            let unaligned_header_bytes = extra_data_end % align;
            if unaligned_header_bytes != 0 {
                let mut pad_length = (align - unaligned_header_bytes) as usize;
                while pad_length < 6 {
                    pad_length += align as usize;
                }
                let new_len = extra_data.len() + pad_length;
                if new_len > u16::MAX as usize {
                    // Alignment is impossible without exceeding extra field size limits.
                    // Skip alignment.
                } else {
                    // Add an extra field to the extra_data, per APPNOTE 4.6.11
                    let mut pad_body = vec![0; pad_length - 4];
                    debug_assert!(pad_body.len() >= 2);
                    [pad_body[0], pad_body[1]] = options.alignment.to_le_bytes();
                    ExtendedFileOptions::add_extra_data_unchecked(
                        &mut extra_data,
                        UsedExtraField::DataStreamAlignment.as_u16(),
                        &pad_body,
                    )?;
                    debug_assert_eq!((extra_data.len() as u64 + header_end) % align, 0);
                }
            }
        }
        let extra_data_len = extra_data.len();
        if let Some(data) = central_extra_data {
            if extra_data_len + data.len() > u16::MAX as usize {
                return Err(invalid!(
                    "Extra data and central extra data must be less than 64KiB when combined"
                ));
            }
            ExtendedFileOptions::validate_extra_data(data, true)?;
        }
        #[cfg(feature = "aes-crypto")]
        let aes_mode = aes_mode.map(super::aes::AesModeOptions::to_tuple);
        let mut file = ZipFileData::initialize_local_block(
            name,
            &options,
            &raw_values,
            header_start,
            None,
            aes_extra_data_start,
            compression_method,
            aes_mode,
            &extra_data,
        );
        if let Some(comment) = options.extended_options.take_file_comment() {
            if comment.len() > u16::MAX as usize {
                return Err(invalid!("File comment must be less than 64KiB"));
            }
            if !comment.is_ascii() {
                file.is_utf8 = true;
            }
            file.file_comment = comment;
        }
        file.using_data_descriptor =
            !self.seek_possible || matches!(options.encrypt_with, Some(EncryptWith::ZipCrypto(..)));
        file.version_made_by = file.version_made_by.max(file.version_needed() as u8);
        file.extra_data_start = Some(header_end);
        let index = self.insert_file_data(file)?;
        self.writing_to_file = true;
        let result: ZipResult<()> = {
            ExtendedFileOptions::validate_extra_data(&extra_data, false)?;
            let file = &mut self.files[index];
            let block = file.local_block()?;
            let writer = self.inner.try_inner_mut()?;
            block.write(writer)?;
            // file name
            writer.write_all(&file.file_name_raw)?;
            if extra_data_len > 0 {
                writer.write_all(&extra_data)?;
                file.extra_field = Some(Arc::from(extra_data.into_boxed_slice()));
            }
            Ok(())
        };
        self.ok_or_abort_file(result)?;
        self.stats.start = self.inner.try_inner_mut()?.stream_position()?;
        match options.encrypt_with {
            #[cfg(feature = "aes-crypto")]
            Some(EncryptWith::Aes {
                mode,
                password,
                salt,
            }) => {
                let writer = self.close_writer()?;
                let aeswriter =
                    crate::aes::AesWriter::new_with_options(writer, mode, password, salt)?;
                self.inner = GenericZipWriter::Storer(MaybeEncrypted::Aes(aeswriter));
            }
            Some(EncryptWith::ZipCrypto(keys, ..)) => {
                let writer = self.close_writer()?;
                let file = &mut self.files[index];
                // With ZipCrypto, we _need_ to use a data descriptor so that
                // we can initialize the stream properly.
                let mut zipwriter = crate::zipcrypto::ZipCryptoWriter {
                    writer,
                    keys,
                    buffer: [0u8; CHUNK_SIZE],
                };
                self.stats.start = zipwriter.writer.stream_position()?;
                // crypto_header is counted as part of the data
                let mut crypto_header = [0u8; 12];
                // The last two bytes of the header should either be the CRC of
                // the file _OR_ the last timepart of the last modified time if
                // a data descriptor is used.
                //
                // However, this header is encrypted, and ZipCrypto is not a
                // seekable encryption algorithm - an earlier plaintext byte
                // will have an impact on the later values.
                //
                // This makes it impossible to write the file without first
                // calculating its CRC. To avoid having to read the file twice
                // or keeping the entire file in memory, we force all ZipCrypto
                // files to use a data descriptor. This way, we can use the
                // local_modified_time as a password check byte instead of the
                // CRC.
                crypto_header[10..=11].copy_from_slice(
                    &file
                        .last_modified_time
                        .unwrap_or_else(DateTime::default_for_write)
                        .timepart()
                        .to_le_bytes(),
                );
                let result = zipwriter.write_all(&crypto_header);
                self.ok_or_abort_file(result)?;
                self.inner = GenericZipWriter::Storer(MaybeEncrypted::ZipCrypto(zipwriter));
            }
            None => {}
        }
        let file = &mut self.files[index];
        debug_assert!(file.data_start.get().is_none());
        file.data_start.get_or_init(|| self.stats.start);
        self.stats.bytes_written = 0;
        self.stats.hasher = Hasher::new();
        Ok(())
    }

    fn insert_file_data(&mut self, file: ZipFileData) -> ZipResult<usize> {
        if self.files.contains_key(&file.file_name) {
            return Err(invalid!("Duplicate filename: {}", file.file_name));
        }
        let (index, _) = self.files.insert_full(file.file_name.clone(), file);
        Ok(index)
    }

    fn finish_file(&mut self) -> ZipResult<()> {
        if !self.writing_to_file {
            return Ok(());
        }

        let make_plain_writer = self.inner.prepare_next_writer(
            Stored,
            None,
            #[cfg(feature = "deflate-zopfli")]
            None,
        )?;
        self.inner.switch_to(make_plain_writer)?;
        self.switch_to_non_encrypting_writer()?;
        let writer = self.inner.try_inner_mut()?;

        if !self.writing_raw {
            let file = match self.files.last_mut() {
                None => return Ok(()),
                Some((_, f)) => f,
            };
            file.uncompressed_size = self.stats.bytes_written;

            let file_end = writer.stream_position()?;
            debug_assert!(file_end >= self.stats.start);
            file.compressed_size = file_end - self.stats.start;

            if !file.using_data_descriptor {
                // Not using a data descriptor means the underlying writer
                // supports seeking, so we can go back and update the AES Extra
                // Data header to use AE1 for large files.
                update_aes_extra_data(writer, file, self.stats.bytes_written)?;
            }

            let crc = !matches!(file.aes_mode, Some((_, AesVendorVersion::Ae2, _)));

            file.crc32 = if crc {
                self.stats.hasher.clone().finalize()
            } else {
                0
            };

            if file.using_data_descriptor {
                file.write_data_descriptor(writer, self.auto_large_file)?;
            } else {
                file.update_local_file_header(writer)?;
                writer.seek(SeekFrom::Start(file_end))?;
            }
        }
        if self.flush_on_finish_file {
            let result = writer.flush();
            self.ok_or_abort_file(result)?;
        }

        self.writing_to_file = false;
        Ok(())
    }

    fn switch_to_non_encrypting_writer(&mut self) -> Result<(), ZipError> {
        self.inner = GenericZipWriter::Storer(
            match mem::replace(&mut self.inner, GenericZipWriter::Closed) {
                #[cfg(feature = "aes-crypto")]
                GenericZipWriter::Storer(MaybeEncrypted::Aes(writer)) => {
                    MaybeEncrypted::Unencrypted(writer.finish()?)
                }
                GenericZipWriter::Storer(MaybeEncrypted::ZipCrypto(writer)) => {
                    MaybeEncrypted::Unencrypted(writer.finish()?)
                }
                GenericZipWriter::Storer(MaybeEncrypted::Unencrypted(w)) => {
                    MaybeEncrypted::Unencrypted(w)
                }
                _ => unreachable!(
                    "switch_to_non_encrypting_writer called with incompatible GenericZipWriter variant"
                ),
            },
        );
        Ok(())
    }

    /// Removes the file currently being written from the archive if there is one, or else removes
    /// the file most recently written.
    pub fn abort_file(&mut self) -> ZipResult<()> {
        let (_, last_file) = self.files.pop().ok_or(ZipError::FileNotFound)?;
        let make_plain_writer = self.inner.prepare_next_writer(
            Stored,
            None,
            #[cfg(feature = "deflate-zopfli")]
            None,
        )?;
        self.inner.switch_to(make_plain_writer)?;
        self.switch_to_non_encrypting_writer()?;
        // Make sure this is the last file, and that no shallow copies of it remain; otherwise we'd
        // overwrite a valid file and corrupt the archive
        let rewind_safe: bool = match last_file.data_start.get() {
            None => self.files.is_empty(),
            Some(last_file_start) => self.files.values().all(|file| {
                file.data_start
                    .get()
                    .is_some_and(|start| start < last_file_start)
            }),
        };
        if rewind_safe {
            self.inner
                .try_inner_mut()?
                .seek(SeekFrom::Start(last_file.header_start))?;
        }
        self.writing_to_file = false;
        Ok(())
    }

    /// Create a file in the archive and start writing its' contents. The file must not have the
    /// same name as a file already in the archive.
    ///
    /// The data should be written using the [`Write`] implementation on this [`ZipWriter`]
    pub fn start_file<S: ToString, T: FileOptionExtension>(
        &mut self,
        name: S,
        mut options: FileOptions<'_, T>,
    ) -> ZipResult<()> {
        options.normalize();
        let make_new_self = self.inner.prepare_next_writer(
            options.compression_method,
            options.compression_level,
            #[cfg(feature = "deflate-zopfli")]
            options.zopfli_buffer_size,
        )?;
        self.start_entry(&name, options, None)?;
        let result = self.inner.switch_to(make_new_self);
        self.ok_or_abort_file(result)?;
        self.writing_raw = false;
        Ok(())
    }

    /// Copy over the entire contents of another archive verbatim.
    ///
    /// This method extracts file metadata from the `source` archive, then simply performs a single
    /// big [`io::copy()`](io::copy) to transfer all the actual file contents without any
    /// decompression or decryption. This is more performant than the equivalent operation of
    /// calling [`Self::raw_copy_file()`] for each entry from the `source` archive in sequence.
    ///
    ///```
    /// # fn main() -> Result<(), zip::result::ZipError> {
    /// # #[cfg(any(feature = "deflate-flate2", not(feature = "_deflate-any")))]
    /// # {
    /// use std::io::{Cursor, Write, Read};
    /// use zip::{ZipArchive, ZipWriter, write::SimpleFileOptions};
    ///
    /// let buf = Cursor::new(Vec::new());
    /// let mut zip = ZipWriter::new(buf);
    /// zip.start_file("a.txt", SimpleFileOptions::default())?;
    /// zip.write_all(b"hello\n")?;
    /// let src = ZipArchive::new(zip.finish()?)?;
    ///
    /// let buf = Cursor::new(Vec::new());
    /// let mut zip = ZipWriter::new(buf);
    /// zip.start_file("b.txt", SimpleFileOptions::default())?;
    /// zip.write_all(b"hey\n")?;
    /// let src2 = ZipArchive::new(zip.finish()?)?;
    ///
    /// let buf = Cursor::new(Vec::new());
    ///
    /// let mut zip = ZipWriter::new(buf);
    /// zip.merge_archive(src)?;
    /// zip.merge_archive(src2)?;
    /// let mut result = ZipArchive::new(zip.finish()?)?;
    ///
    /// let mut s: String = String::new();
    /// result.by_name("a.txt")?.read_to_string(&mut s)?;
    /// assert_eq!(s, "hello\n");
    /// s.clear();
    /// result.by_name("b.txt")?.read_to_string(&mut s)?;
    /// assert_eq!(s, "hey\n");
    /// # }
    /// # Ok(())
    /// # }
    ///```
    pub fn merge_archive<R>(&mut self, mut source: ZipArchive<R>) -> ZipResult<()>
    where
        R: Read + Seek,
    {
        self.finish_file()?;

        /* Ensure we accept the file contents on faith (and avoid overwriting the data).
         * See raw_copy_file_rename(). */
        self.writing_to_file = true;
        self.writing_raw = true;

        let writer = self.inner.try_inner_mut()?;
        /* Get the file entries from the source archive. */
        let new_files = source.merge_contents(writer)?;

        /* These file entries are now ours! */
        self.files.extend(new_files);

        Ok(())
    }

    /// Starts a file, taking a Path as argument.
    ///
    /// This function ensures that the '/' path separator is used and normalizes `.` and `..`. It
    /// ignores any `..` or Windows drive letter that would produce a path outside the ZIP file's
    /// root.
    pub fn start_file_from_path<E: FileOptionExtension, P: AsRef<Path>>(
        &mut self,
        path: P,
        options: FileOptions<'_, E>,
    ) -> ZipResult<()> {
        self.start_file(path_to_string(path)?, options)
    }

    /// Add a new file using the already compressed data from a ZIP file being read and renames it, this
    /// allows faster copies of the `ZipFile` since there is no need to decompress and compress it again.
    /// Any `ZipFile` metadata is copied and not checked, for example the file CRC.
    ///
    /// ```no_run
    /// use std::fs::File;
    /// use std::io::{Read, Seek, Write};
    /// use zip::{ZipArchive, ZipWriter};
    ///
    /// fn copy_rename<R, W>(
    ///     src: &mut ZipArchive<R>,
    ///     dst: &mut ZipWriter<W>,
    /// ) -> zip::result::ZipResult<()>
    /// where
    ///     R: Read + Seek,
    ///     W: Write + Seek,
    /// {
    ///     // Retrieve file entry by name
    ///     let file = src.by_name("src_file.txt")?;
    ///
    ///     // Copy and rename the previously obtained file entry to the destination zip archive
    ///     dst.raw_copy_file_rename(file, "new_name.txt")?;
    ///
    ///     Ok(())
    /// }
    /// ```
    pub fn raw_copy_file_rename<R: Read, S: ToString>(
        &mut self,
        file: ZipFile<'_, R>,
        name: S,
    ) -> ZipResult<()> {
        let mut options = file.options().into_full_options();
        if !file.comment().is_empty() {
            options = options.with_file_comment(file.comment());
        }
        self.raw_copy_file_rename_internal(file, &name, options)
    }

    fn raw_copy_file_rename_internal<R: Read, S: ToString, T: FileOptionExtension>(
        &mut self,
        mut file: ZipFile<'_, R>,
        name: &S,
        options: FileOptions<'_, T>,
    ) -> ZipResult<()> {
        let raw_values = ZipRawValues {
            crc32: file.crc32(),
            compressed_size: file.compressed_size(),
            uncompressed_size: file.size(),
        };

        self.start_entry(name, options, Some(raw_values))?;
        self.writing_to_file = true;
        self.writing_raw = true;

        io::copy(&mut file.take_raw_reader()?, self)?;
        self.finish_file()
    }

    /// Like `raw_copy_file_to_path`, but uses Path arguments.
    ///
    /// This function ensures that the '/' path separator is used and normalizes `.` and `..`. It
    /// ignores any `..` or Windows drive letter that would produce a path outside the ZIP file's
    /// root.
    pub fn raw_copy_file_to_path<R: Read, P: AsRef<Path>>(
        &mut self,
        file: ZipFile<'_, R>,
        path: P,
    ) -> ZipResult<()> {
        self.raw_copy_file_rename(file, path_to_string(path)?)
    }

    /// Add a new file using the already compressed data from a ZIP file being read, this allows faster
    /// copies of the `ZipFile` since there is no need to decompress and compress it again. Any `ZipFile`
    /// metadata is copied and not checked, for example the file CRC.
    ///
    /// ```no_run
    /// use std::fs::File;
    /// use std::io::{Read, Seek, Write};
    /// use zip::{ZipArchive, ZipWriter};
    ///
    /// fn copy<R, W>(src: &mut ZipArchive<R>, dst: &mut ZipWriter<W>) -> zip::result::ZipResult<()>
    /// where
    ///     R: Read + Seek,
    ///     W: Write + Seek,
    /// {
    ///     // Retrieve file entry by name
    ///     let file = src.by_name("src_file.txt")?;
    ///
    ///     // Copy the previously obtained file entry to the destination zip archive
    ///     dst.raw_copy_file(file)?;
    ///
    ///     Ok(())
    /// }
    /// ```
    pub fn raw_copy_file<R: Read>(&mut self, file: ZipFile<'_, R>) -> ZipResult<()> {
        let name = file.name().to_owned();
        self.raw_copy_file_rename(file, name)
    }

    /// Add a new file using the already compressed data from a ZIP file being read and set the last
    /// modified date and unix mode. This allows faster copies of the `ZipFile` since there is no need
    /// to decompress and compress it again. Any `ZipFile` metadata other than the last modified date
    /// and the unix mode is copied and not checked, for example the file CRC.
    ///
    /// ```no_run
    /// use std::io::{Read, Seek, Write};
    /// use zip::{DateTime, ZipArchive, ZipWriter};
    ///
    /// fn copy<R, W>(src: &mut ZipArchive<R>, dst: &mut ZipWriter<W>) -> zip::result::ZipResult<()>
    /// where
    ///     R: Read + Seek,
    ///     W: Write + Seek,
    /// {
    ///     // Retrieve file entry by name
    ///     let file = src.by_name("src_file.txt")?;
    ///
    ///     // Copy the previously obtained file entry to the destination zip archive
    ///     dst.raw_copy_file_touch(file, DateTime::default(), Some(0o644))?;
    ///
    ///     Ok(())
    /// }
    /// ```
    pub fn raw_copy_file_touch<R: Read>(
        &mut self,
        file: ZipFile<'_, R>,
        last_modified_time: DateTime,
        unix_mode: Option<u32>,
    ) -> ZipResult<()> {
        let name = file.name().to_owned();

        let mut options = file.options().into_full_options();

        options = options.last_modified_time(last_modified_time);

        if let Some(perms) = unix_mode {
            options = options.unix_permissions(perms);
        }

        if !file.comment().is_empty() {
            options = options.with_file_comment(file.comment());
        }

        options.normalize();

        self.raw_copy_file_rename_internal(file, &name, options)
    }

    /// Add a directory entry.
    ///
    /// As directories have no content, you must not call [`ZipWriter::write`] before adding a new file.
    pub fn add_directory<S, T: FileOptionExtension>(
        &mut self,
        name: S,
        mut options: FileOptions<'_, T>,
    ) -> ZipResult<()>
    where
        S: Into<String>,
    {
        if options.permissions.is_none() {
            options.permissions = Some(DEFAULT_DIR_PERMISSIONS);
        }
        *options
            .permissions
            .as_mut()
            .ok_or_else(|| std::io::Error::other("Cannot get permissions as mutable"))? |= 0o40000;
        options.compression_method = Stored;
        options.encrypt_with = None;

        let name_as_string = name.into();
        // Append a slash to the filename if it does not end with it.
        let name_with_slash = match name_as_string.chars().last() {
            Some('/' | '\\') => name_as_string,
            _ => name_as_string + "/",
        };

        self.start_entry(&name_with_slash, options, None)?;
        self.writing_to_file = false;
        self.switch_to_non_encrypting_writer()?;
        Ok(())
    }

    /// Add a directory entry, taking a Path as argument.
    ///
    /// This function ensures that the '/' path separator is used and normalizes `.` and `..`. It
    /// ignores any `..` or Windows drive letter that would produce a path outside the ZIP file's
    /// root.
    pub fn add_directory_from_path<T: FileOptionExtension, P: AsRef<Path>>(
        &mut self,
        path: P,
        options: FileOptions<'_, T>,
    ) -> ZipResult<()> {
        self.add_directory(path_to_string(path)?, options)
    }

    /// Finish the last file and write all other zip-structures
    ///
    /// This will return the writer, but one should normally not append any data to the end of the file.
    /// Note that the zipfile will also be finished on drop.
    pub fn finish(mut self) -> ZipResult<W> {
        let _central_start = self.finalize()?;
        self.close_writer()
    }

    fn close_writer(&mut self) -> ZipResult<W> {
        let inner = mem::replace(&mut self.inner, GenericZipWriter::Closed);
        match inner {
            GenericZipWriter::Storer(MaybeEncrypted::Unencrypted(w)) => Ok(w),
            _ => Err(invalid!(
                "Should have switched to stored and unencrypted beforehand",
            )),
        }
    }

    /// Add a symlink entry.
    ///
    /// The zip archive will contain an entry for path `name` which is a symlink to `target`.
    ///
    /// No validation or normalization of the paths is performed. For best results,
    /// callers should normalize `\` to `/` and ensure symlinks are relative to other
    /// paths within the zip archive.
    ///
    /// WARNING: not all zip implementations preserve symlinks on extract. Some zip
    /// implementations may materialize a symlink as a regular file, possibly with the
    /// content incorrectly set to the symlink target. For maximum portability, consider
    /// storing a regular file instead.
    pub fn add_symlink<N: ToString, T: ToString, E: FileOptionExtension>(
        &mut self,
        name: N,
        target: T,
        mut options: FileOptions<'_, E>,
    ) -> ZipResult<()> {
        if options.permissions.is_none() {
            options.permissions = Some(0o777);
        }
        *options
            .permissions
            .as_mut()
            .ok_or_else(|| std::io::Error::other("Cannot get permissions as mutable"))? |=
            ffi::S_IFLNK;
        // The symlink target is stored as file content. And compressing the target path
        // likely wastes space. So always store.
        options.compression_method = Stored;

        self.start_entry(&name, options, None)?;
        self.writing_to_file = true;
        let result = self.write_all(target.to_string().as_bytes());
        self.ok_or_abort_file(result)?;
        self.writing_raw = false;
        self.finish_file()?;

        Ok(())
    }

    /// Add a symlink entry, taking Paths to the location and target as arguments.
    ///
    /// This function ensures that the '/' path separator is used and normalizes `.` and `..`. It
    /// ignores any `..` or Windows drive letter that would produce a path outside the ZIP file's
    /// root.
    pub fn add_symlink_from_path<P: AsRef<Path>, T: AsRef<Path>, E: FileOptionExtension>(
        &mut self,
        path: P,
        target: T,
        options: FileOptions<'_, E>,
    ) -> ZipResult<()> {
        let path = path_to_string(path)?;
        let target = path_to_string(target)?;
        self.add_symlink(path, target, options)
    }

    fn finalize(&mut self) -> ZipResult<u64> {
        self.finish_file()?;

        let mut central_start = self.write_central_and_footer()?;
        let writer = self.inner.try_inner_mut()?;
        let footer_end = writer.stream_position()?;
        let archive_end = writer.seek(SeekFrom::End(0))?;
        if footer_end < archive_end {
            // Data from an aborted file is past the end of the footer.

            // Overwrite the magic so the footer is no longer valid.
            writer.seek(SeekFrom::Start(central_start))?;
            writer.write_u32_le(0)?;
            writer.seek(SeekFrom::Start(
                footer_end
                    - (size_of::<Magic>() + size_of::<Zip32CDEBlock>()) as u64
                    - self.comment.len() as u64,
            ))?;
            writer.write_u32_le(0)?;

            // Rewrite the footer at the actual end.
            let central_and_footer_size = footer_end - central_start;
            writer.seek(SeekFrom::End(-(central_and_footer_size as i64)))?;
            central_start = self.write_central_and_footer()?;
            debug_assert!(self.inner.try_inner_mut()?.stream_position()? == archive_end);
        }

        Ok(central_start)
    }

    fn write_central_and_footer(&mut self) -> Result<u64, ZipError> {
        let writer = self.inner.try_inner_mut()?;

        let mut version_needed = u16::from(MIN_VERSION);
        let central_start = writer.stream_position()?;
        for file in self.files.values() {
            file.write_central_directory_header(writer)?;
            version_needed = version_needed.max(file.version_needed());
        }
        let central_size = writer.stream_position()? - central_start;
        let is64 = self.files.len() > spec::ZIP64_ENTRY_THR
            || central_size.max(central_start) > spec::ZIP64_BYTES_THR
            || self.zip64_extensible_data_sector.is_some();

        if is64 {
            let zip64_extensible_data_sector = self.zip64_extensible_data_sector.clone();
            let extensible_len = zip64_extensible_data_sector
                .as_ref()
                .map(|e| e.len() as u64)
                .unwrap_or(0);

            let zip64_footer = spec::Zip64CentralDirectoryEnd {
                record_size: extensible_len + 44,
                version_made_by: version_needed,
                version_needed_to_extract: version_needed,
                disk_number: 0,
                disk_with_central_directory: 0,
                number_of_files_on_this_disk: self.files.len() as u64,
                number_of_files: self.files.len() as u64,
                central_directory_size: central_size,
                central_directory_offset: central_start,
                zip64_extensible_data_sector,
            };

            zip64_footer.write(writer)?;

            let zip64_footer = spec::Zip64CentralDirectoryEndLocator {
                disk_with_central_directory: 0,
                end_of_central_directory_offset: central_start + central_size,
                number_of_disks: 1,
            };

            zip64_footer.write(writer)?;
        }

        let central_directory_size = if is64 {
            spec::ZIP64_BYTES_THR as u32
        } else {
            central_size.min(spec::ZIP64_BYTES_THR) as u32
        };

        let number_of_files = self.files.len().min(spec::ZIP64_ENTRY_THR) as u16;
        let footer = spec::Zip32CentralDirectoryEnd {
            disk_number: 0,
            disk_with_central_directory: 0,
            zip_file_comment: self.comment.clone(),
            number_of_files_on_this_disk: number_of_files,
            number_of_files,
            central_directory_size,
            central_directory_offset: central_start.min(spec::ZIP64_BYTES_THR) as u32,
        };

        footer.write(writer)?;
        Ok(central_start)
    }

    fn index_by_name(&self, name: &str) -> ZipResult<usize> {
        self.files.get_index_of(name).ok_or(ZipError::FileNotFound)
    }

    /// Adds another entry to the central directory referring to the same content as an existing
    /// entry. The file's local-file header will still refer to it by its original name, so
    /// unzipping the file will technically be unspecified behavior. [`ZipArchive`] ignores the
    /// filename in the local-file header and treat the central directory as authoritative. However,
    /// some other software (e.g. Minecraft) will refuse to extract a file copied this way.
    pub fn shallow_copy_file(&mut self, src_name: &str, dest_name: &str) -> ZipResult<()> {
        self.finish_file()?;
        if src_name == dest_name {
            return Err(invalid!("Trying to copy a file to itself"));
        }
        let src_index = self.index_by_name(src_name)?;
        let mut dest_data = self.files[src_index].clone();
        dest_data.file_name = dest_name.into();
        dest_data.file_name_raw = dest_name.as_bytes().into();
        dest_data.central_header_start = 0;
        self.insert_file_data(dest_data)?;

        Ok(())
    }

    /// Like `shallow_copy_file`, but uses Path arguments.
    ///
    /// This function ensures that the '/' path separator is used and normalizes `.` and `..`. It
    /// ignores any `..` or Windows drive letter that would produce a path outside the ZIP file's
    /// root.
    pub fn shallow_copy_file_from_path<T: AsRef<Path>, U: AsRef<Path>>(
        &mut self,
        src_path: T,
        dest_path: U,
    ) -> ZipResult<()> {
        let src = path_to_string(src_path)?;
        let dest = path_to_string(dest_path)?;
        self.shallow_copy_file(&src, &dest)
    }
}

impl<W: Write> ZipWriter<StreamWriter<W>> {
    /// Creates a writer that doesn't require the inner writer to implement [Seek], but where
    /// operations that would overwrite previously-written bytes or cause subsequent operations to
    /// do so (such as `abort_file`) will always return an error.
    pub fn new_stream(inner: W) -> ZipWriter<StreamWriter<W>> {
        ZipWriter {
            inner: GenericZipWriter::Storer(MaybeEncrypted::Unencrypted(StreamWriter::new(inner))),
            files: IndexMap::new(),
            stats: ZipWriterStats::default(),
            writing_to_file: false,
            writing_raw: false,
            comment: Box::new([]),
            zip64_extensible_data_sector: None,
            flush_on_finish_file: false,
            seek_possible: false,
            auto_large_file: false,
        }
    }
}

impl<W: Write + Seek> Drop for ZipWriter<W> {
    fn drop(&mut self) {
        if !self.inner.is_closed()
            && let Err(e) = self.finalize()
        {
            let _ = write!(
                io::stderr(),
                "ZipWriter::drop: failed to finalize archive: {e:?}"
            );
        }
    }
}

type SwitchWriterFunction<W> = Box<dyn FnOnce(MaybeEncrypted<W>) -> ZipResult<GenericZipWriter<W>>>;

impl<W: Write + Seek> GenericZipWriter<W> {
    fn prepare_next_writer(
        &self,
        compression: CompressionMethod,
        compression_level: Option<i64>,
        #[cfg(feature = "deflate-zopfli")] zopfli_buffer_size: Option<usize>,
    ) -> ZipResult<SwitchWriterFunction<W>> {
        if let GenericZipWriter::Closed = self {
            return Err(
                io::Error::new(io::ErrorKind::BrokenPipe, "ZipWriter was already closed").into(),
            );
        }

        match compression {
            Stored => {
                if compression_level.is_some() {
                    Err(UnsupportedArchive("Unsupported compression level"))
                } else {
                    Ok(Box::new(|bare| Ok(GenericZipWriter::Storer(bare))))
                }
            }
            #[allow(unreachable_code)]
            #[cfg(feature = "_deflate-any")]
            CompressionMethod::Deflated => {
                let default = {
                    #[cfg(feature = "deflate-flate2")]
                    {
                        i64::from(flate2::Compression::default().level())
                    }
                    #[cfg(all(not(feature = "deflate-flate2"), feature = "deflate-zopfli"))]
                    {
                        24
                    }
                    #[cfg(not(any(feature = "deflate-zopfli", feature = "deflate-flate2")))]
                    {
                        compile_error!("could not calculate default: unknown deflate variant")
                    }
                };

                let level = validate_value_in_range(
                    compression_level.unwrap_or(default),
                    deflate_compression_level_range(),
                )
                .ok_or(UnsupportedArchive("Unsupported compression level"))?;

                #[cfg(feature = "deflate-zopfli")]
                {
                    macro_rules! deflate_zopfli_and_return {
                        ($bare:expr, $best_non_zopfli:expr) => {{
                            let options = zopfli::Options {
                                iteration_count: core::num::NonZeroU64::try_from(u64::from(
                                    level - $best_non_zopfli,
                                ))
                                .map_err(|e| {
                                    std::io::Error::other(format!(
                                        "Failed to get the iteration count for zopfli : {e}"
                                    ))
                                })?,
                                ..Default::default()
                            };
                            Ok(Box::new(move |bare| {
                                Ok(match zopfli_buffer_size {
                                    Some(size) => GenericZipWriter::BufferedZopfliDeflater(
                                        std::io::BufWriter::with_capacity(
                                            size,
                                            zopfli::DeflateEncoder::new(
                                                options,
                                                Default::default(),
                                                bare,
                                            ),
                                        ),
                                    ),
                                    None => GenericZipWriter::ZopfliDeflater(
                                        zopfli::DeflateEncoder::new(
                                            options,
                                            Default::default(),
                                            bare,
                                        ),
                                    ),
                                })
                            }))
                        }};
                    }

                    #[cfg(feature = "deflate-flate2")]
                    {
                        let best_non_zopfli = flate2::Compression::best().level();
                        if level > best_non_zopfli {
                            return deflate_zopfli_and_return!(bare, best_non_zopfli);
                        }
                    }
                    #[cfg(not(feature = "deflate-flate2"))]
                    {
                        let best_non_zopfli = 9;
                        return deflate_zopfli_and_return!(bare, best_non_zopfli);
                    }
                }
                #[cfg(feature = "deflate-flate2")]
                {
                    Ok(Box::new(move |bare| {
                        Ok(GenericZipWriter::Deflater(
                            flate2::write::DeflateEncoder::new(
                                bare,
                                flate2::Compression::new(level),
                            ),
                        ))
                    }))
                }
                #[cfg(not(feature = "deflate-flate2"))]
                {
                    unreachable!("deflate writer: have no fallback for this case")
                }
            }
            #[cfg(feature = "deflate64")]
            CompressionMethod::Deflate64 => {
                Err(UnsupportedArchive("Compressing Deflate64 is not supported"))
            }
            #[cfg(feature = "_bzip2_any")]
            CompressionMethod::Bzip2 => {
                let level: u32 = validate_value_in_range(
                    compression_level.unwrap_or(i64::from(bzip2::Compression::default().level())),
                    bzip2_compression_level_range(),
                )
                .ok_or(UnsupportedArchive("Unsupported compression level"))?;
                Ok(Box::new(move |bare| {
                    Ok(GenericZipWriter::Bzip2(bzip2::write::BzEncoder::new(
                        bare,
                        bzip2::Compression::new(level),
                    )))
                }))
            }
            CompressionMethod::AES => Err(UnsupportedArchive(
                "AES encryption is enabled through FileOptions::with_aes_encryption",
            )),
            #[cfg(feature = "zstd")]
            CompressionMethod::Zstd => {
                let level = validate_value_in_range(
                    compression_level.unwrap_or(i64::from(zstd::DEFAULT_COMPRESSION_LEVEL)),
                    zstd::compression_level_range(),
                )
                .ok_or(UnsupportedArchive("Unsupported compression level"))?;
                Ok(Box::new(move |bare| {
                    Ok(GenericZipWriter::Zstd(
                        zstd::stream::write::Encoder::new(bare, level as i32)
                            .map_err(ZipError::Io)?,
                    ))
                }))
            }
            #[cfg(feature = "legacy-zip")]
            CompressionMethod::Shrink => Err(ZipError::UnsupportedArchive(
                "Shrink compression unsupported",
            )),
            #[cfg(feature = "legacy-zip")]
            CompressionMethod::Reduce(_) => Err(ZipError::UnsupportedArchive(
                "Reduce compression unsupported",
            )),
            #[cfg(feature = "legacy-zip")]
            CompressionMethod::Implode => Err(ZipError::UnsupportedArchive(
                "Implode compression unsupported",
            )),
            #[cfg(feature = "lzma")]
            CompressionMethod::Lzma => {
                Err(UnsupportedArchive("LZMA isn't supported for compression"))
            }
            #[cfg(feature = "xz")]
            CompressionMethod::Xz => {
                let level = validate_value_in_range(compression_level.unwrap_or(6), 0_u32..=9_u32)
                    .ok_or(UnsupportedArchive("Unsupported compression level"))?;
                Ok(Box::new(move |bare| {
                    Ok(GenericZipWriter::Xz(Box::new(
                        lzma_rust2::XzWriter::new(bare, lzma_rust2::XzOptions::with_preset(level))
                            .map_err(ZipError::Io)?,
                    )))
                }))
            }
            #[cfg(feature = "ppmd")]
            CompressionMethod::Ppmd => {
                const ORDERS: [u32; 10] = [0, 4, 5, 6, 7, 8, 9, 10, 11, 12];

                let level = validate_value_in_range(compression_level.unwrap_or(7), 1_u32..=9_u32)
                    .ok_or(UnsupportedArchive("Unsupported compression level"))?;

                let order = ORDERS[level as usize];
                let memory_size = 1 << (level + 19);
                let memory_size_mb = memory_size / 1024 / 1024;

                Ok(Box::new(move |mut bare| {
                    let parameter: u16 = (order as u16 - 1)
                        + ((memory_size_mb - 1) << 4) as u16
                        + ((ppmd_rust::RestoreMethod::Restart as u16) << 12);

                    bare.write_all(&parameter.to_le_bytes())
                        .map_err(ZipError::Io)?;

                    let encoder = ppmd_rust::Ppmd8Encoder::new(
                        bare,
                        order,
                        memory_size,
                        ppmd_rust::RestoreMethod::Restart,
                    )
                    .map_err(|error| match error {
                        ppmd_rust::Error::RangeDecoderInitialization => ZipError::InvalidArchive(
                            "PPMd range coder initialization failed".into(),
                        ),
                        ppmd_rust::Error::InvalidParameter => {
                            ZipError::InvalidArchive("Invalid PPMd parameter".into())
                        }
                        ppmd_rust::Error::IoError(io_error) => ZipError::Io(io_error),
                        ppmd_rust::Error::MemoryAllocation => ZipError::Io(io::Error::new(
                            ErrorKind::OutOfMemory,
                            "PPMd could not allocate memory",
                        )),
                    })?;

                    Ok(GenericZipWriter::Ppmd(Box::new(encoder)))
                }))
            }
            #[allow(deprecated)]
            CompressionMethod::Unsupported(..) => {
                Err(UnsupportedArchive("Unsupported compression"))
            }
        }
    }

    fn switch_to(&mut self, make_new_self: SwitchWriterFunction<W>) -> ZipResult<()> {
        let bare = match mem::replace(self, GenericZipWriter::Closed) {
            GenericZipWriter::Storer(w) => w,
            #[cfg(feature = "deflate-flate2")]
            GenericZipWriter::Deflater(w) => w.finish()?,
            #[cfg(feature = "deflate-zopfli")]
            GenericZipWriter::ZopfliDeflater(w) => w.finish()?,
            #[cfg(feature = "deflate-zopfli")]
            GenericZipWriter::BufferedZopfliDeflater(w) => w
                .into_inner()
                .map_err(|e| ZipError::Io(e.into_error()))?
                .finish()?,
            #[cfg(feature = "_bzip2_any")]
            GenericZipWriter::Bzip2(w) => w.finish()?,
            #[cfg(feature = "zstd")]
            GenericZipWriter::Zstd(w) => w.finish()?,
            #[cfg(feature = "xz")]
            GenericZipWriter::Xz(w) => w.finish()?,
            #[cfg(feature = "ppmd")]
            GenericZipWriter::Ppmd(w) => {
                // ZIP needs to encode an end marker (7z for example doesn't encode one).
                w.finish(true)?
            }
            GenericZipWriter::Closed => {
                return Err(io::Error::new(
                    io::ErrorKind::BrokenPipe,
                    "ZipWriter was already closed",
                )
                .into());
            }
        };
        *self = make_new_self(bare)?;
        Ok(())
    }

    fn ref_mut(&mut self) -> Option<&mut dyn Write> {
        match self {
            GenericZipWriter::Storer(w) => Some(w as &mut dyn Write),
            #[cfg(feature = "deflate-flate2")]
            GenericZipWriter::Deflater(w) => Some(w as &mut dyn Write),
            #[cfg(feature = "deflate-zopfli")]
            GenericZipWriter::ZopfliDeflater(w) => Some(w as &mut dyn Write),
            #[cfg(feature = "deflate-zopfli")]
            GenericZipWriter::BufferedZopfliDeflater(w) => Some(w as &mut dyn Write),
            #[cfg(feature = "_bzip2_any")]
            GenericZipWriter::Bzip2(w) => Some(w as &mut dyn Write),
            #[cfg(feature = "zstd")]
            GenericZipWriter::Zstd(w) => Some(w as &mut dyn Write),
            #[cfg(feature = "xz")]
            GenericZipWriter::Xz(w) => Some(w as &mut dyn Write),
            #[cfg(feature = "ppmd")]
            GenericZipWriter::Ppmd(w) => Some(w as &mut dyn Write),
            GenericZipWriter::Closed => None,
        }
    }

    const fn is_closed(&self) -> bool {
        matches!(*self, GenericZipWriter::Closed)
    }

    fn try_inner_mut(&mut self) -> Result<&mut W, std::io::Error> {
        match *self {
            GenericZipWriter::Storer(MaybeEncrypted::Unencrypted(ref mut w)) => Ok(w),
            _ => Err(std::io::Error::other(
                "Should have switched to stored and unencrypted beforehand",
            )),
        }
    }
}

#[cfg(feature = "_deflate-any")]
fn deflate_compression_level_range() -> std::ops::RangeInclusive<u32> {
    #[cfg(not(any(feature = "deflate-zopfli", feature = "deflate-flate2")))]
    {
        compile_error!("min: unknown deflate variant - enable deflate-zopfli or deflate-flate2")
    }

    let min = {
        #[cfg(feature = "deflate-flate2")]
        {
            flate2::Compression::fast().level()
        }
        #[cfg(all(not(feature = "deflate-flate2"), feature = "deflate-zopfli"))]
        {
            1
        }
    };

    let max = {
        #[cfg(feature = "deflate-zopfli")]
        {
            264
        }
        #[cfg(all(not(feature = "deflate-zopfli"), feature = "deflate-flate2"))]
        {
            flate2::Compression::best().level()
        }
    };

    min..=max
}

#[cfg(feature = "_bzip2_any")]
fn bzip2_compression_level_range() -> std::ops::RangeInclusive<u32> {
    let min = bzip2::Compression::fast().level();
    let max = bzip2::Compression::best().level();
    min..=max
}

#[cfg(any(
    feature = "_deflate-any",
    feature = "_bzip2_any",
    feature = "ppmd",
    feature = "xz",
    feature = "zstd",
))]
fn validate_value_in_range<T: Ord + Copy, U: Ord + Copy + TryFrom<T>>(
    value: T,
    range: std::ops::RangeInclusive<U>,
) -> Option<U> {
    let value: U = value.try_into().ok()?;
    if range.contains(&value) {
        Some(value)
    } else {
        None
    }
}

fn update_aes_extra_data<W: Write + Seek>(
    writer: &mut W,
    file: &mut ZipFileData,
    bytes_written: u64,
) -> ZipResult<()> {
    let Some((aes_mode, version, compression_method)) = &mut file.aes_mode else {
        return Ok(());
    };

    // We prefer using AE-1 which provides an extra CRC check, but for small files we
    // switch to AE-2 to prevent being able to use the CRC value to to reconstruct the
    // unencrypted contents.
    //
    // We can only do this when the underlying writer supports
    // seek operations, so we gate this behind using_data_descriptor.
    //
    // C.f. https://www.winzip.com/en/support/aes-encryption/#crc-faq
    *version = if bytes_written < 20 {
        AesVendorVersion::Ae2
    } else {
        AesVendorVersion::Ae1
    };

    let extra_data_start = file
        .extra_data_start
        .ok_or_else(|| std::io::Error::other("Cannot get the extra data start"))?;

    writer.seek(SeekFrom::Start(
        extra_data_start + file.aes_extra_data_start,
    ))?;

    let aes_extra_field = AexEncryption::new(*version, *aes_mode, *compression_method);
    let buf = aes_extra_field.as_bytes();
    writer.write_all(buf)?;

    let aes_extra_data_start = file.aes_extra_data_start as usize;
    let Some(ref mut extra_field) = file.extra_field else {
        return Err(invalid!(
            "update_aes_extra_data called on a file that has no extra-data field"
        ));
    };
    let mut vec = extra_field.to_vec();
    vec[aes_extra_data_start..aes_extra_data_start + size_of::<AexEncryption>()]
        .copy_from_slice(buf);
    *extra_field = Arc::from(vec.into_boxed_slice());

    Ok(())
}

impl ZipFileData {
    pub(crate) fn update_local_file_header<T: Write + Seek>(
        &mut self,
        writer: &mut T,
    ) -> ZipResult<()> {
        writer.seek(SeekFrom::Start(
            self.header_start + (size_of::<Magic>() + offset_of!(ZipLocalEntryBlock, crc32)) as u64,
        ))?;
        writer.write_u32_le(self.crc32)?;
        if self.large_file {
            writer.write_u32_le(spec::ZIP64_BYTES_THR as u32)?;
            writer.write_u32_le(spec::ZIP64_BYTES_THR as u32)?;

            self.update_local_zip64_extra_field(writer)?;

            // self.compressed_size = spec::ZIP64_BYTES_THR;
            // self.uncompressed_size = spec::ZIP64_BYTES_THR;
        } else {
            // check compressed size as well as it can also be slightly larger than uncompressed size
            if self.compressed_size > spec::ZIP64_BYTES_THR {
                return Err(ZipError::Io(std::io::Error::other(
                    "large_file(true) option has not been set",
                )));
            }
            writer.write_u32_le(self.compressed_size as u32)?;
            // uncompressed size is already checked on write to catch it as soon as possible
            writer.write_u32_le(self.uncompressed_size as u32)?;
        }
        Ok(())
    }

    fn update_local_zip64_extra_field<T: Write + Seek>(&mut self, writer: &mut T) -> ZipResult<()> {
        let zip64_block = Zip64ExtendedInformation::local_header(
            self.large_file,
            self.uncompressed_size,
            self.compressed_size,
        )
        .ok_or(invalid!(
            "Attempted to update a nonexistent ZIP64 extra field"
        ))?;

        let zip64_extra_field_start = self.header_start
            + (size_of::<Magic>() + size_of::<ZipLocalEntryBlock>()) as u64
            + self.file_name_raw.len() as u64;

        writer.seek(SeekFrom::Start(zip64_extra_field_start))?;
        let zip64_block = zip64_block.serialize();
        writer.write_all(&zip64_block)?;
        Ok(())
    }

    pub(crate) fn write_central_directory_header<T: Write>(&self, writer: &mut T) -> ZipResult<()> {
        let mut block = self.block()?;
        let stripped_extra = if let Some(extra) = &self.extra_field {
            strip_alignment_extra_field(extra, true)
        } else {
            Vec::new()
        };
        let central_len = self.central_extra_field_len();
        let zip64_extra_field_block = Zip64ExtendedInformation::central_header(
            self.large_file,
            self.uncompressed_size,
            self.compressed_size,
            self.header_start,
        );
        let zip64_block_len = if let Some(zip64) = zip64_extra_field_block {
            zip64.full_size()
        } else {
            0
        };
        let total_extra_len = zip64_block_len + stripped_extra.len() + central_len;
        block.extra_field_length = u16::try_from(total_extra_len)
            .map_err(|_| invalid!("Extra field length in central directory exceeds 64KiB"))?;

        block.write(writer)?;
        // file name
        writer.write_all(&self.file_name_raw)?;
        // extra field
        if let Some(zip64_extra_field) = zip64_extra_field_block {
            writer.write_all(&zip64_extra_field.serialize())?;
        }
        if !stripped_extra.is_empty() {
            writer.write_all(&stripped_extra)?;
        }
        if let Some(central_extra_field) = &self.central_extra_field {
            writer.write_all(central_extra_field)?;
        }
        // file comment
        writer.write_all(self.file_comment.as_bytes())?;

        Ok(())
    }
}

pub(crate) fn strip_alignment_extra_field(extra_field: &[u8], remove_zip64: bool) -> Vec<u8> {
    let mut new_extra = Vec::with_capacity(extra_field.len());
    let mut cursor = 0;
    while cursor + 4 <= extra_field.len() {
        let tag = u16::from_le_bytes([extra_field[cursor], extra_field[cursor + 1]]);
        let len = u16::from_le_bytes([extra_field[cursor + 2], extra_field[cursor + 3]]) as usize;
        if cursor + 4 + len > extra_field.len() {
            new_extra.extend_from_slice(&extra_field[cursor..]);
            break;
        }

        if tag != UsedExtraField::DataStreamAlignment.as_u16()
            && !(tag == UsedExtraField::Zip64ExtendedInfo.as_u16() && remove_zip64)
        {
            new_extra.extend_from_slice(&extra_field[cursor..cursor + 4 + len]);
        }
        cursor += 4 + len;
    }
    if cursor < extra_field.len() {
        new_extra.extend_from_slice(&extra_field[cursor..]);
    }
    new_extra
}

/// Wrapper around a [Write] implementation that implements the [Seek] trait, but where seeking
/// returns an error unless it's a no-op.
pub struct StreamWriter<W: Write> {
    inner: W,
    bytes_written: u64,
}

impl<W: Write> StreamWriter<W> {
    /// Creates an instance wrapping the provided inner writer.
    pub fn new(inner: W) -> StreamWriter<W> {
        Self {
            inner,
            bytes_written: 0,
        }
    }

    /// Gets a reference to the underlying writer.
    pub fn get_ref(&self) -> &W {
        &self.inner
    }

    /// Gets a mutable reference to the underlying writer.
    pub fn get_mut(&mut self) -> &mut W {
        &mut self.inner
    }

    /// Consumes this wrapper, returning the underlying writer.
    pub fn into_inner(self) -> W {
        self.inner
    }
}

impl<W: Write> Write for StreamWriter<W> {
    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
        let bytes_written = self.inner.write(buf)?;
        self.bytes_written += bytes_written as u64;
        Ok(bytes_written)
    }

    fn flush(&mut self) -> io::Result<()> {
        self.inner.flush()
    }
}

impl<W: Write> Seek for StreamWriter<W> {
    fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> {
        match pos {
            SeekFrom::Current(0) | SeekFrom::End(0) => return Ok(self.bytes_written),
            SeekFrom::Start(x) if x == self.bytes_written => {
                return Ok(self.bytes_written);
            }
            _ => {}
        }
        Err(io::Error::new(
            ErrorKind::Unsupported,
            "seek is not supported",
        ))
    }
}

#[cfg(test)]
#[allow(unknown_lints)] // needless_update is new in clippy pre 1.29.0
#[allow(clippy::needless_update)] // So we can use the same FileOptions decls with and without zopfli_buffer_size
#[allow(clippy::octal_escapes)] // many false positives in converted fuzz cases
mod tests {
    use super::{ExtendedFileOptions, FileOptions, FullFileOptions, ZipWriter};
    use crate::CompressionMethod::Stored;
    use crate::compression::CompressionMethod;
    use crate::datetime::DateTime;
    use crate::result::ZipResult;
    use crate::types::System;
    use crate::write::EncryptWith::ZipCrypto;
    use crate::write::SimpleFileOptions;
    use crate::zipcrypto::ZipCryptoKeys;
    use crate::{HasZipMetadata, ZipArchive};
    #[cfg(feature = "deflate-flate2")]
    use std::io::Read;
    use std::io::{Cursor, Write};
    use std::marker::PhantomData;
    use std::path::PathBuf;

    const SYSTEM_BYTE: u8 = if cfg!(windows) {
        System::Dos
    } else {
        System::Unix
    } as u8;

    #[test]
    fn write_empty_zip() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_comment("ZIP").unwrap();
        let result = writer.finish().unwrap();
        assert_eq!(result.get_ref().len(), 25);
        assert_eq!(
            *result.get_ref(),
            [
                80, 75, 5, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 90, 73, 80
            ]
        );
    }

    #[test]
    fn write_file_comment_roundtrip() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        // let options = SimpleFileOptions::default().compression_method(Stored);
        let options = FileOptions {
            extended_options: ExtendedFileOptions {
                extra_data: vec![].into(),
                central_extra_data: vec![].into(),
                file_comment: Some("file comment".into()),
            },

            // won't work with zopfli and no flate2, because DEFLATE is write-only in that cfg
            #[cfg(all(feature = "deflate-zopfli", not(feature = "deflate-flate2")))]
            compression_method: crate::CompressionMethod::Stored,
            ..Default::default()
        };
        writer.start_file("foo.txt", options)?;
        writer.write_all(b"data")?;
        let options2 = FileOptions {
            extended_options: ExtendedFileOptions {
                extra_data: vec![].into(),
                central_extra_data: vec![].into(),
                file_comment: Some("file2 comment".into()),
            },
            // won't work with zopfli and no flate2, because DEFLATE is write-only in that cfg
            #[cfg(all(feature = "deflate-zopfli", not(feature = "deflate-flate2")))]
            compression_method: crate::CompressionMethod::Stored,
            ..Default::default()
        };
        writer.start_file("foo2.txt", options2)?;
        writer.write_all(b"data2")?;

        let bytes = writer.finish()?.into_inner();
        let mut archive = ZipArchive::new(Cursor::new(bytes))?;
        {
            let file = archive.by_name("foo.txt")?;
            assert_eq!(file.comment(), "file comment");
        }
        let file2 = archive.by_name("foo2.txt")?;
        assert_eq!(file2.comment(), "file2 comment");
        Ok(())
    }

    #[test]
    fn unix_permissions_bitmask() {
        // unix_permissions() throws away upper bits.
        let options = SimpleFileOptions::default().unix_permissions(0o120777);
        assert_eq!(options.permissions, Some(0o777));
    }

    #[test]
    fn write_zip_dir() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer
            .add_directory(
                "test",
                SimpleFileOptions::default().last_modified_time(
                    DateTime::from_date_and_time(2018, 8, 15, 20, 45, 6).unwrap(),
                ),
            )
            .unwrap();
        assert!(
            writer
                .write(b"writing to a directory is not allowed, and will not write any data")
                .is_err()
        );
        let result = writer.finish().unwrap();
        assert_eq!(result.get_ref().len(), 108);
        const DOS_DIR_ATTRIBUTES_BYTE: u8 = if cfg!(windows) { 0x10 } else { 0 };
        #[rustfmt::skip]
        assert_eq!(
            *result.get_ref(),
            &[
                80u8, 75, 3, 4, 20, 0, 0, 0, 0, 0, 163, 165, 15, 77, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                0, 0, 5, 0, 0, 0, 116, 101, 115, 116, 47, 80, 75, 1, 2, 20, SYSTEM_BYTE, 20, 0, 0, 0, 0, 0,
                163, 165, 15, 77, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                DOS_DIR_ATTRIBUTES_BYTE, 0, 237, 65, 0, 0, 0, 0, 116, 101, 115, 116, 47, 80, 75, 5, 6, 0, 0, 0, 0, 1, 0,
                1, 0, 51, 0, 0, 0, 35, 0, 0, 0, 0, 0,
            ] as &[u8]
        );
    }

    #[test]
    fn write_symlink_simple() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer
            .add_symlink(
                "name",
                "target",
                SimpleFileOptions::default().last_modified_time(
                    DateTime::from_date_and_time(2018, 8, 15, 20, 45, 6).unwrap(),
                ),
            )
            .unwrap();
        assert!(
            writer
                .write(b"writing to a symlink is not allowed and will not write any data")
                .is_err()
        );
        let result = writer.finish().unwrap();
        assert_eq!(result.get_ref().len(), 112);
        #[rustfmt::skip]
        assert_eq!(
            *result.get_ref(),
            &[
                80u8, 75, 3, 4, 10, 0, 0, 0, 0, 0, 163, 165, 15, 77, 252, 47, 111, 70, 6, 0, 0, 0,
                6, 0, 0, 0, 4, 0, 0, 0, 110, 97, 109, 101, 116, 97, 114, 103, 101, 116, 80, 75, 1,
                2, 10, System::Unix as u8, 10, 0, 0, 0, 0, 0, 163, 165, 15, 77, 252, 47, 111, 70, 6, 0, 0, 0, 6, 0,
                0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 161, 0, 0, 0, 0, 110, 97, 109, 101,
                80, 75, 5, 6, 0, 0, 0, 0, 1, 0, 1, 0, 50, 0, 0, 0, 40, 0, 0, 0, 0, 0
            ] as &[u8],
        );
    }

    #[test]
    fn test_path_normalization() {
        let mut path = PathBuf::new();
        path.push("foo");
        path.push("bar");
        path.push("..");
        path.push(".");
        path.push("example.txt");
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer
            .start_file_from_path(path, SimpleFileOptions::default())
            .unwrap();
        let archive = writer.finish_into_readable().unwrap();
        assert_eq!(Some("foo/example.txt"), archive.name_for_index(0));
    }

    #[test]
    fn write_symlink_wonky_paths() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer
            .add_symlink(
                "directory\\link",
                "/absolute/symlink\\with\\mixed/slashes",
                SimpleFileOptions::default().last_modified_time(
                    DateTime::from_date_and_time(2018, 8, 15, 20, 45, 6).unwrap(),
                ),
            )
            .unwrap();
        assert!(
            writer
                .write(b"writing to a symlink is not allowed and will not write any data")
                .is_err()
        );
        let result = writer.finish().unwrap();
        assert_eq!(result.get_ref().len(), 162);
        #[rustfmt::skip]
        assert_eq!(
            *result.get_ref(),
            &[
                80u8, 75, 3, 4, 10, 0, 0, 0, 0, 0, 163, 165, 15, 77, 95, 41, 81, 245, 36, 0, 0, 0,
                36, 0, 0, 0, 14, 0, 0, 0, 100, 105, 114, 101, 99, 116, 111, 114, 121, 92, 108, 105,
                110, 107, 47, 97, 98, 115, 111, 108, 117, 116, 101, 47, 115, 121, 109, 108, 105,
                110, 107, 92, 119, 105, 116, 104, 92, 109, 105, 120, 101, 100, 47, 115, 108, 97,
                115, 104, 101, 115, 80, 75, 1, 2, 10, System::Unix as u8, 10, 0, 0, 0, 0, 0, 163, 165, 15, 77, 95,
                41, 81, 245, 36, 0, 0, 0, 36, 0, 0, 0, 14, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255,
                161, 0, 0, 0, 0, 100, 105, 114, 101, 99, 116, 111, 114, 121, 92, 108, 105, 110,
                107, 80, 75, 5, 6, 0, 0, 0, 0, 1, 0, 1, 0, 60, 0, 0, 0, 80, 0, 0, 0, 0, 0
            ] as &[u8],
        );
    }

    #[test]
    fn write_mimetype_zip() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        let options = FileOptions {
            compression_method: Stored,
            compression_level: None,
            last_modified_time: DateTime::default(),
            permissions: Some(33188),
            large_file: false,
            encrypt_with: None,
            extended_options: (),
            alignment: 1,
            #[cfg(feature = "deflate-zopfli")]
            zopfli_buffer_size: None,
            #[cfg(feature = "aes-crypto")]
            aes_mode: None,
            system: None,
        };
        writer.start_file("mimetype", options).unwrap();
        writer
            .write_all(b"application/vnd.oasis.opendocument.text")
            .unwrap();
        let result = writer.finish().unwrap();

        assert_eq!(result.get_ref().len(), 153);
        #[rustfmt::skip]
        assert_eq!(result.get_ref(), &[80, 75, 3, 4, 10, 0, 0, 0, 0, 0, 0, 0, 33, 0, 94, 198, 50,
            12, 39, 0, 0, 0, 39, 0, 0, 0, 8, 0, 0, 0, 109, 105, 109, 101, 116, 121, 112, 101, 97,
            112, 112, 108, 105, 99, 97, 116, 105, 111, 110, 47, 118, 110, 100, 46, 111, 97, 115,
            105, 115, 46, 111, 112, 101, 110, 100, 111, 99, 117, 109, 101, 110, 116, 46, 116, 101,
            120, 116, 80, 75, 1, 2, 10, SYSTEM_BYTE, 10, 0, 0, 0, 0, 0, 0, 0, 33, 0, 94, 198, 50,
            12, 39, 0, 0, 0, 39, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 164, 129, 0, 0, 0, 0,
            109, 105, 109, 101, 116, 121, 112, 101, 80, 75, 5, 6, 0, 0, 0, 0, 1, 0, 1, 0, 54, 0, 0,
            0, 77, 0, 0, 0, 0, 0]);
    }

    #[cfg(feature = "deflate-flate2")]
    const RT_TEST_TEXT: &str = "And I can't stop thinking about the moments that I lost to you\
                            And I can't stop thinking of things I used to do\
                            And I can't stop making bad decisions\
                            And I can't stop eating stuff you make me chew\
                            I put on a smile like you wanna see\
                            Another day goes by that I long to be like you";
    #[cfg(feature = "deflate-flate2")]
    const RT_TEST_FILENAME: &str = "subfolder/sub-subfolder/can't_stop.txt";
    #[cfg(feature = "deflate-flate2")]
    const SECOND_FILENAME: &str = "different_name.xyz";
    #[cfg(feature = "deflate-flate2")]
    const THIRD_FILENAME: &str = "third_name.xyz";

    #[test]
    fn write_non_utf8() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        let options = FileOptions {
            compression_method: Stored,
            compression_level: None,
            last_modified_time: DateTime::default(),
            permissions: Some(33188),
            large_file: false,
            encrypt_with: None,
            extended_options: (),
            alignment: 1,
            #[cfg(feature = "deflate-zopfli")]
            zopfli_buffer_size: None,
            #[cfg(feature = "aes-crypto")]
            aes_mode: None,
            system: None,
        };

        // GB18030
        // "中文" = [214, 208, 206, 196]
        let filename = unsafe { String::from_utf8_unchecked(vec![214, 208, 206, 196]) };
        writer.start_file(filename, options).unwrap();
        writer.write_all(b"encoding GB18030").unwrap();

        // SHIFT_JIS
        // "日文" = [147, 250, 149, 182]
        let filename = unsafe { String::from_utf8_unchecked(vec![147, 250, 149, 182]) };
        writer.start_file(filename, options).unwrap();
        writer.write_all(b"encoding SHIFT_JIS").unwrap();
        let result = writer.finish().unwrap();

        assert_eq!(result.get_ref().len(), 224);
        #[rustfmt::skip]
        assert_eq!(result.get_ref(), &[80, 75, 3, 4, 10, 0, 0, 0, 0, 0, 0, 0, 33, 0, 29, 183, 125,
            75, 16, 0, 0, 0, 16, 0, 0, 0, 4, 0, 0, 0, 214, 208, 206, 196, 101, 110, 99, 111, 100,
            105, 110, 103, 32, 71, 66, 49, 56, 48, 51, 48, 80, 75, 3, 4, 10, 0, 0, 0, 0, 0, 0, 0,
            33, 0, 75, 110, 14, 242, 18, 0, 0, 0, 18, 0, 0, 0, 4, 0, 0, 0, 147, 250, 149, 182, 101,
            110, 99, 111, 100, 105, 110, 103, 32, 83, 72, 73, 70, 84, 95, 74, 73, 83, 80, 75, 1, 2,
            10, SYSTEM_BYTE, 10, 0, 0, 0, 0, 0, 0, 0, 33, 0, 29, 183, 125, 75, 16, 0, 0, 0, 16, 0,
            0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 164, 129, 0, 0, 0, 0, 214, 208, 206, 196, 80,
            75, 1, 2, 10, SYSTEM_BYTE, 10, 0, 0, 0, 0, 0, 0, 0, 33, 0, 75, 110, 14, 242, 18, 0, 0, 0, 18, 0,
            0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 164, 129, 50, 0, 0, 0, 147, 250, 149, 182, 80,
            75, 5, 6, 0, 0, 0, 0, 2, 0, 2, 0, 100, 0, 0, 0, 102, 0, 0, 0, 0, 0]);
    }

    #[test]
    fn path_to_string() {
        let mut path = PathBuf::new();
        #[cfg(windows)]
        path.push(r"C:\");
        #[cfg(unix)]
        path.push("/");
        path.push("windows");
        path.push("..");
        path.push(".");
        path.push("system32");
        let path_str = super::path_to_string(&path).unwrap();
        assert_eq!(&*path_str, "system32");
    }

    #[test]
    #[cfg(feature = "deflate-flate2")]
    fn test_shallow_copy() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        let options = FileOptions {
            compression_method: CompressionMethod::default(),
            compression_level: None,
            last_modified_time: DateTime::default(),
            permissions: Some(33188),
            large_file: false,
            encrypt_with: None,
            extended_options: (),
            alignment: 0,
            #[cfg(feature = "deflate-zopfli")]
            zopfli_buffer_size: None,
            #[cfg(feature = "aes-crypto")]
            aes_mode: None,
            system: None,
        };
        writer.start_file(RT_TEST_FILENAME, options).unwrap();
        writer.write_all(RT_TEST_TEXT.as_ref()).unwrap();
        writer
            .shallow_copy_file(RT_TEST_FILENAME, SECOND_FILENAME)
            .unwrap();
        writer
            .shallow_copy_file(RT_TEST_FILENAME, SECOND_FILENAME)
            .expect_err("Duplicate filename");
        let zip = writer.finish().unwrap();
        let mut writer = ZipWriter::new_append(zip).unwrap();
        writer
            .shallow_copy_file(SECOND_FILENAME, SECOND_FILENAME)
            .expect_err("Duplicate filename");
        let mut reader = writer.finish_into_readable().unwrap();
        let mut file_names: Vec<&str> = reader.file_names().collect();
        file_names.sort();
        let mut expected_file_names = vec![RT_TEST_FILENAME, SECOND_FILENAME];
        expected_file_names.sort();
        assert_eq!(file_names, expected_file_names);
        let mut first_file_content = String::new();
        reader
            .by_name(RT_TEST_FILENAME)
            .unwrap()
            .read_to_string(&mut first_file_content)
            .unwrap();
        assert_eq!(first_file_content, RT_TEST_TEXT);
        let mut second_file_content = String::new();
        reader
            .by_name(SECOND_FILENAME)
            .unwrap()
            .read_to_string(&mut second_file_content)
            .unwrap();
        assert_eq!(second_file_content, RT_TEST_TEXT);
    }

    #[test]
    #[cfg(feature = "deflate-flate2")]
    fn test_deep_copy() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        let options = FileOptions {
            compression_method: CompressionMethod::default(),
            compression_level: None,
            last_modified_time: DateTime::default(),
            permissions: Some(33188),
            large_file: false,
            encrypt_with: None,
            extended_options: (),
            alignment: 0,
            #[cfg(feature = "deflate-zopfli")]
            zopfli_buffer_size: None,
            #[cfg(feature = "aes-crypto")]
            aes_mode: None,
            system: None,
        };
        writer.start_file(RT_TEST_FILENAME, options).unwrap();
        writer.write_all(RT_TEST_TEXT.as_ref()).unwrap();
        writer
            .deep_copy_file(RT_TEST_FILENAME, SECOND_FILENAME)
            .unwrap();
        let zip = writer.finish().unwrap().into_inner();
        zip.iter().copied().for_each(|x| print!("{x:02x}"));
        println!();
        let mut writer = ZipWriter::new_append(Cursor::new(zip)).unwrap();
        writer
            .deep_copy_file(RT_TEST_FILENAME, THIRD_FILENAME)
            .unwrap();
        let zip = writer.finish().unwrap();
        let mut reader = ZipArchive::new(zip).unwrap();
        let mut file_names: Vec<&str> = reader.file_names().collect();
        file_names.sort();
        let mut expected_file_names = vec![RT_TEST_FILENAME, SECOND_FILENAME, THIRD_FILENAME];
        expected_file_names.sort();
        assert_eq!(file_names, expected_file_names);
        let mut first_file_content = String::new();
        reader
            .by_name(RT_TEST_FILENAME)
            .unwrap()
            .read_to_string(&mut first_file_content)
            .unwrap();
        assert_eq!(first_file_content, RT_TEST_TEXT);
        let mut second_file_content = String::new();
        reader
            .by_name(SECOND_FILENAME)
            .unwrap()
            .read_to_string(&mut second_file_content)
            .unwrap();
        assert_eq!(second_file_content, RT_TEST_TEXT);
    }

    #[test]
    fn duplicate_filenames() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer
            .start_file("foo/bar/test", SimpleFileOptions::default())
            .unwrap();
        writer
            .write_all("The quick brown 🦊 jumps over the lazy 🐕".as_bytes())
            .unwrap();
        writer
            .start_file("foo/bar/test", SimpleFileOptions::default())
            .expect_err("Expected duplicate filename not to be allowed");
    }

    #[test]
    fn test_filename_looks_like_zip64_locator() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer
            .start_file(
                "PK\u{6}\u{7}\0\0\0\u{11}\0\0\0\0\0\0\0\0\0\0\0\0",
                SimpleFileOptions::default(),
            )
            .unwrap();
        let zip = writer.finish().unwrap();
        let _ = ZipArchive::new(zip).unwrap();
    }

    #[test]
    fn test_filename_looks_like_zip64_locator_2() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer
            .start_file(
                "PK\u{6}\u{6}\0\0\0\0\0\0\0\0\0\0PK\u{6}\u{7}\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0",
                SimpleFileOptions::default(),
            )
            .unwrap();
        let zip = writer.finish().unwrap();
        let _ = ZipArchive::new(zip).unwrap();
    }

    #[test]
    fn test_filename_looks_like_zip64_locator_2a() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer
            .start_file(
                "PK\u{6}\u{6}PK\u{6}\u{7}\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0",
                SimpleFileOptions::default(),
            )
            .unwrap();
        let zip = writer.finish().unwrap();
        let _ = ZipArchive::new(zip).unwrap();
    }

    #[test]
    fn test_filename_looks_like_zip64_locator_3() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer
            .start_file("\0PK\u{6}\u{6}", SimpleFileOptions::default())
            .unwrap();
        writer
            .start_file(
                "\0\u{4}\0\0PK\u{6}\u{7}\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\u{3}",
                SimpleFileOptions::default(),
            )
            .unwrap();
        let zip = writer.finish().unwrap();
        let _ = ZipArchive::new(zip).unwrap();
    }

    #[test]
    fn test_filename_looks_like_zip64_locator_4() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer
            .start_file("PK\u{6}\u{6}", SimpleFileOptions::default())
            .unwrap();
        writer
            .start_file("\0\0\0\0\0\0", SimpleFileOptions::default())
            .unwrap();
        writer
            .start_file("\0", SimpleFileOptions::default())
            .unwrap();
        writer.start_file("", SimpleFileOptions::default()).unwrap();
        writer
            .start_file("\0\0", SimpleFileOptions::default())
            .unwrap();
        writer
            .start_file(
                "\0\0\0PK\u{6}\u{7}\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0",
                SimpleFileOptions::default(),
            )
            .unwrap();
        let zip = writer.finish().unwrap();
        let _ = ZipArchive::new(zip).unwrap();
    }

    #[test]
    fn test_filename_looks_like_zip64_locator_5() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer
            .add_directory("", SimpleFileOptions::default().with_alignment(21))
            .unwrap();
        let mut writer = ZipWriter::new_append(writer.finish().unwrap()).unwrap();
        writer.shallow_copy_file("/", "").unwrap();
        writer.shallow_copy_file("", "\0").unwrap();
        writer.shallow_copy_file("\0", "PK\u{6}\u{6}").unwrap();
        let mut writer = ZipWriter::new_append(writer.finish().unwrap()).unwrap();
        writer
            .start_file("\0\0\0\0\0\0", SimpleFileOptions::default())
            .unwrap();
        let mut writer = ZipWriter::new_append(writer.finish().unwrap()).unwrap();
        writer
            .start_file(
                "#PK\u{6}\u{7}\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0",
                SimpleFileOptions::default(),
            )
            .unwrap();
        let zip = writer.finish().unwrap();
        let _ = ZipArchive::new(zip).unwrap();
        Ok(())
    }

    #[test]
    #[cfg(feature = "deflate-flate2")]
    fn remove_shallow_copy_keeps_original() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer
            .start_file("original", SimpleFileOptions::default())
            .unwrap();
        writer.write_all(RT_TEST_TEXT.as_bytes()).unwrap();
        writer
            .shallow_copy_file("original", "shallow_copy")
            .unwrap();
        writer.abort_file().unwrap();
        let mut zip = ZipArchive::new(writer.finish().unwrap()).unwrap();
        let mut file = zip.by_name("original").unwrap();
        let mut contents = Vec::new();
        file.read_to_end(&mut contents).unwrap();
        assert_eq!(RT_TEST_TEXT.as_bytes(), contents);
        Ok(())
    }

    #[test]
    fn remove_encrypted_file() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        let first_file_options = SimpleFileOptions::default()
            .with_alignment(0xFFFF)
            .with_deprecated_encryption(b"Password");
        writer.start_file("", first_file_options).unwrap();
        writer.abort_file().unwrap();
        let zip = writer.finish().unwrap();
        let mut writer = ZipWriter::new(zip);
        writer.start_file("", SimpleFileOptions::default()).unwrap();
        Ok(())
    }

    #[test]
    fn remove_encrypted_aligned_symlink() -> ZipResult<()> {
        let mut options = SimpleFileOptions::default();
        options = options.with_deprecated_encryption(b"Password");
        options.alignment = 0xFFFF;
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.add_symlink("", "s\t\0\0ggggg\0\0", options).unwrap();
        writer.abort_file().unwrap();
        let zip = writer.finish().unwrap();
        let mut writer = ZipWriter::new_append(zip).unwrap();
        writer.start_file("", SimpleFileOptions::default()).unwrap();
        Ok(())
    }

    #[cfg(feature = "deflate-zopfli")]
    #[test]
    fn zopfli_empty_write() -> ZipResult<()> {
        let mut options = SimpleFileOptions::default();
        options = options
            .compression_method(CompressionMethod::default())
            .compression_level(Some(264));
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.start_file("", options).unwrap();
        writer.write_all(&[]).unwrap();
        writer.write_all(&[]).unwrap();
        Ok(())
    }

    #[test]
    fn crash_with_no_features() -> ZipResult<()> {
        const ORIGINAL_FILE_NAME: &str = "PK\u{6}\u{6}\0\0\0\0\0\0\0\0\0\u{2}g\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\u{1}\0\0\0\0\0\0\0\0\0\0PK\u{6}\u{7}\0\0\0\0\0\0\0\0\0\0\0\0\u{7}\0\t'";
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        let mut options = SimpleFileOptions::default();
        options = options.with_alignment(3584).compression_method(Stored);
        writer.start_file(ORIGINAL_FILE_NAME, options)?;
        let archive = writer.finish()?;
        let mut writer = ZipWriter::new_append(archive)?;
        writer.shallow_copy_file(ORIGINAL_FILE_NAME, "\u{6}\\")?;
        writer.finish()?;
        Ok(())
    }

    #[test]
    fn test_alignment() {
        let page_size = 4096;
        let options = SimpleFileOptions::default()
            .compression_method(Stored)
            .with_alignment(page_size);
        let mut zip = ZipWriter::new(Cursor::new(Vec::new()));
        let contents = b"sleeping";
        let () = zip.start_file("sleep", options).unwrap();
        let _count = zip.write(&contents[..]).unwrap();
        let mut zip = zip.finish_into_readable().unwrap();
        let file = zip.by_index(0).unwrap();
        assert_eq!(file.name(), "sleep");
        let data_start = file.data_start().unwrap();
        assert_eq!(data_start, u64::from(page_size));
    }

    #[test]
    fn test_alignment_2() {
        let page_size = 4096;
        let mut data = Vec::new();
        {
            let options = SimpleFileOptions::default()
                .compression_method(Stored)
                .with_alignment(page_size);
            let mut zip = ZipWriter::new(Cursor::new(&mut data));
            let contents = b"sleeping";
            let () = zip.start_file("sleep", options).unwrap();
            let _count = zip.write(&contents[..]).unwrap();
        }
        assert_eq!(data[4096..4104], b"sleeping"[..]);
        {
            let mut zip = ZipArchive::new(Cursor::new(&mut data)).unwrap();
            let file = zip.by_index(0).unwrap();
            assert_eq!(file.name(), "sleep");
            let data_start = file.data_start().unwrap();
            assert_eq!(data_start, u64::from(page_size));
        }
    }

    #[test]
    fn test_crash_short_read() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        let comment = vec![
            1, 80, 75, 5, 6, 237, 237, 237, 237, 237, 237, 237, 237, 44, 255, 191, 255, 255, 255,
            255, 255, 255, 255, 255, 16,
        ]
        .into_boxed_slice();
        writer.set_raw_comment(comment).unwrap();
        let options = SimpleFileOptions::default()
            .compression_method(Stored)
            .with_alignment(11823);
        writer.start_file("", options).unwrap();
        writer.write_all(&[255, 255, 44, 255, 0]).unwrap();
        let written = writer.finish().unwrap();
        let _ = ZipWriter::new_append(written).unwrap();
    }

    #[cfg(all(feature = "_deflate-any", feature = "aes-crypto"))]
    #[test]
    fn test_fuzz_failure_2024_05_08() -> ZipResult<()> {
        let mut first_writer = ZipWriter::new(Cursor::new(Vec::new()));
        let mut second_writer = ZipWriter::new(Cursor::new(Vec::new()));
        let options = SimpleFileOptions::default()
            .compression_method(Stored)
            .with_alignment(46036);
        second_writer.add_symlink("\0", "", options)?;
        let second_archive = second_writer.finish_into_readable()?.into_inner();
        let mut second_writer = ZipWriter::new_append(second_archive)?;
        let options = SimpleFileOptions::default()
            .compression_method(CompressionMethod::Deflated)
            .large_file(true)
            .with_alignment(46036)
            .with_aes_encryption(crate::AesMode::Aes128, "\0\0");
        second_writer.add_symlink("", "", options)?;
        let second_archive = second_writer.finish_into_readable()?.into_inner();
        let mut second_writer = ZipWriter::new_append(second_archive)?;
        let options = SimpleFileOptions::default().compression_method(Stored);
        second_writer.start_file(" ", options)?;
        let second_archive = second_writer.finish_into_readable()?;
        first_writer.merge_archive(second_archive)?;
        let _ = ZipArchive::new(first_writer.finish()?)?;
        Ok(())
    }

    #[cfg(all(feature = "_bzip2_any", not(miri)))]
    #[test]
    fn test_fuzz_failure_2024_06_08() -> ZipResult<()> {
        use crate::write::ExtendedFileOptions;
        use CompressionMethod::Bzip2;

        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        const SYMLINK_PATH: &str = "PK\u{6}\u{6}K\u{6}\u{6}\u{6}\0\0\0\0\u{18}\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\u{1}\0\0\0\0\0\0\0\0\u{1}\0\0PK\u{1}\u{2},\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\u{1}\0\0PK\u{1}\u{2},\0\0\0\0\0\0\0\0\0\0l\0\0\0\0\0\0PK\u{6}\u{7}P\0\0\0\0\0\0\0\0\0\0\0\0\u{1}\0\0";
        let sub_writer = {
            let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
            writer.set_flush_on_finish_file(false);
            let options = FileOptions {
                compression_method: Bzip2,
                compression_level: None,
                last_modified_time: DateTime::from_date_and_time(1980, 5, 20, 21, 0, 57)?,
                permissions: None,
                large_file: false,
                encrypt_with: None,
                extended_options: ExtendedFileOptions {
                    extra_data: vec![].into(),
                    central_extra_data: vec![].into(),
                    file_comment: None,
                },
                alignment: 2048,
                ..Default::default()
            };
            writer.add_symlink_from_path(SYMLINK_PATH, "||\0\0\0\0", options)?;
            writer = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
            writer.deep_copy_file_from_path(SYMLINK_PATH, "")?;
            writer = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
            writer.abort_file()?;
            writer
        };
        writer.merge_archive(sub_writer.finish_into_readable()?)?;
        writer = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
        writer.deep_copy_file_from_path(SYMLINK_PATH, "foo")?;
        let _ = writer.finish_into_readable()?;
        Ok(())
    }

    #[test]
    fn test_short_extra_data() {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let options = FileOptions {
            extended_options: ExtendedFileOptions {
                extra_data: vec![].into(),
                central_extra_data: vec![99, 0, 15, 0, 207].into(),
                file_comment: None,
            },
            ..Default::default()
        };
        assert!(writer.start_file_from_path("", options).is_err());
    }

    #[test]
    #[cfg(not(feature = "unreserved"))]
    fn test_invalid_extra_data() -> ZipResult<()> {
        use crate::write::ExtendedFileOptions;
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let options = FileOptions {
            compression_method: Stored,
            compression_level: None,
            last_modified_time: DateTime::from_date_and_time(1980, 1, 4, 6, 54, 0)?,
            permissions: None,
            large_file: false,
            encrypt_with: None,
            extended_options: ExtendedFileOptions {
                extra_data: vec![].into(),
                central_extra_data: vec![
                    7, 0, 15, 0, 207, 117, 177, 117, 112, 2, 0, 255, 255, 131, 255, 255, 255, 80,
                    185,
                ]
                .into(),
                file_comment: None,
            },
            alignment: 32787,
            ..Default::default()
        };
        assert!(writer.start_file_from_path("", options).is_err());
        Ok(())
    }

    #[test]
    #[cfg(not(feature = "unreserved"))]
    fn test_invalid_extra_data_unreserved() {
        use crate::write::ExtendedFileOptions;
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        let options = FileOptions {
            compression_method: Stored,
            compression_level: None,
            last_modified_time: DateTime::from_date_and_time(2021, 8, 8, 1, 0, 29).unwrap(),
            permissions: None,
            large_file: true,
            encrypt_with: None,
            extended_options: ExtendedFileOptions {
                extra_data: vec![].into(),
                central_extra_data: vec![
                    1, 41, 4, 0, 1, 255, 245, 117, 117, 112, 5, 0, 80, 255, 149, 255, 247,
                ]
                .into(),
                file_comment: None,
            },
            alignment: 4103,
            ..Default::default()
        };
        assert!(writer.start_file_from_path("", options).is_err());
    }

    #[cfg(feature = "deflate64")]
    #[test]
    fn test_fuzz_crash_2024_06_13a() -> ZipResult<()> {
        use crate::write::ExtendedFileOptions;
        use CompressionMethod::Deflate64;

        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let options = FileOptions {
            compression_method: Deflate64,
            compression_level: None,
            last_modified_time: DateTime::from_date_and_time(2039, 4, 17, 6, 18, 19)?,
            permissions: None,
            large_file: true,
            encrypt_with: None,
            extended_options: ExtendedFileOptions {
                extra_data: vec![].into(),
                central_extra_data: vec![].into(),
                file_comment: None,
            },
            alignment: 4,
            ..Default::default()
        };
        writer.add_directory_from_path("", options)?;
        let _ = writer.finish_into_readable()?;
        Ok(())
    }

    #[test]
    fn test_fuzz_crash_2024_06_13b() -> ZipResult<()> {
        use crate::write::ExtendedFileOptions;
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let sub_writer = {
            let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
            writer.set_flush_on_finish_file(false);
            let options = FileOptions {
                compression_method: Stored,
                compression_level: None,
                last_modified_time: DateTime::from_date_and_time(1980, 4, 14, 6, 11, 54)?,
                permissions: None,
                large_file: false,
                encrypt_with: None,
                extended_options: ExtendedFileOptions {
                    extra_data: vec![].into(),
                    central_extra_data: vec![].into(),
                    file_comment: None,
                },
                alignment: 185,
                ..Default::default()
            };
            writer.add_symlink_from_path("", "", options)?;
            writer
        };
        writer.merge_archive(sub_writer.finish_into_readable()?)?;
        writer.deep_copy_file_from_path("", "_copy")?;
        let _ = writer.finish_into_readable()?;
        Ok(())
    }

    #[test]
    fn test_fuzz_crash_2024_06_14() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let sub_writer = {
            let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
            writer.set_flush_on_finish_file(false);
            let options = FullFileOptions {
                compression_method: Stored,
                large_file: true,
                alignment: 93,
                ..Default::default()
            };
            writer.start_file_from_path("\0", options)?;
            writer = ZipWriter::new_append(writer.finish()?)?;
            writer.deep_copy_file_from_path("\0", "")?;
            writer
        };
        writer.merge_archive(sub_writer.finish_into_readable()?)?;
        writer.deep_copy_file_from_path("", "copy")?;
        let _ = writer.finish_into_readable()?;
        Ok(())
    }

    #[test]
    fn test_fuzz_crash_2024_06_14a() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let options = FileOptions {
            compression_method: Stored,
            compression_level: None,
            last_modified_time: DateTime::from_date_and_time(2083, 5, 30, 21, 45, 35)?,
            permissions: None,
            large_file: false,
            encrypt_with: None,
            extended_options: ExtendedFileOptions {
                extra_data: vec![].into(),
                central_extra_data: vec![].into(),
                file_comment: None,
            },
            alignment: 2565,
            ..Default::default()
        };
        writer.add_symlink_from_path("", "", options)?;
        writer.abort_file()?;
        let options = FileOptions {
            compression_method: Stored,
            compression_level: None,
            last_modified_time: DateTime::default(),
            permissions: None,
            large_file: false,
            encrypt_with: None,
            extended_options: ExtendedFileOptions {
                extra_data: vec![].into(),
                central_extra_data: vec![].into(),
                file_comment: None,
            },
            alignment: 0,
            ..Default::default()
        };
        writer.start_file_from_path("", options)?;
        let _ = writer.finish_into_readable()?;
        Ok(())
    }

    #[allow(deprecated)]
    #[test]
    fn test_fuzz_crash_2024_06_14b() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let options = FileOptions {
            compression_method: Stored,
            compression_level: None,
            last_modified_time: DateTime::from_date_and_time(2078, 3, 6, 12, 48, 58)?,
            permissions: None,
            large_file: true,
            encrypt_with: None,
            extended_options: ExtendedFileOptions {
                extra_data: vec![].into(),
                central_extra_data: vec![].into(),
                file_comment: None,
            },
            alignment: 0xFFF1,
            ..Default::default()
        };
        writer.start_file_from_path("\u{4}\0@\n//\u{c}", options)?;
        writer = ZipWriter::new_append(writer.finish()?)?;
        writer.abort_file()?;
        let options = FileOptions {
            compression_method: CompressionMethod::Unsupported(0xFFFF),
            compression_level: None,
            last_modified_time: DateTime::from_date_and_time(2055, 10, 2, 11, 48, 49)?,
            permissions: None,
            large_file: true,
            encrypt_with: None,
            extended_options: ExtendedFileOptions {
                extra_data: vec![255, 255, 1, 0, 255, 0, 0, 0, 0].into(),
                central_extra_data: vec![].into(),
                file_comment: None,
            },
            alignment: 0xFFFF,
            ..Default::default()
        };
        writer.add_directory_from_path("", options)?;
        let _ = writer.finish_into_readable()?;
        Ok(())
    }

    #[test]
    fn test_fuzz_crash_2024_06_14c() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let sub_writer = {
            let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
            writer.set_flush_on_finish_file(false);
            let options = FileOptions {
                compression_method: Stored,
                compression_level: None,
                last_modified_time: DateTime::from_date_and_time(2060, 4, 6, 13, 13, 3)?,
                permissions: None,
                large_file: true,
                encrypt_with: None,
                extended_options: ExtendedFileOptions {
                    extra_data: vec![].into(),
                    central_extra_data: vec![].into(),
                    file_comment: None,
                },
                alignment: 0,
                ..Default::default()
            };
            writer.start_file_from_path("\0", options)?;
            writer.write_all(&([]))?;
            writer = ZipWriter::new_append(writer.finish()?)?;
            writer.deep_copy_file_from_path("\0", "")?;
            writer
        };
        writer.merge_archive(sub_writer.finish_into_readable()?)?;
        writer.deep_copy_file_from_path("", "_copy")?;
        let _ = writer.finish_into_readable()?;
        Ok(())
    }

    #[cfg(all(feature = "_deflate-any", feature = "aes-crypto"))]
    #[test]
    fn test_fuzz_crash_2024_06_14d() -> ZipResult<()> {
        use crate::AesMode::Aes256;
        use crate::write::EncryptWith::Aes;
        use CompressionMethod::Deflated;
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let options = FileOptions {
            compression_method: Deflated,
            compression_level: Some(5),
            last_modified_time: DateTime::from_date_and_time(2107, 4, 8, 15, 54, 19)?,
            permissions: None,
            large_file: true,
            encrypt_with: Some(Aes {
                mode: Aes256,
                password: &[],
                salt: None,
            }),
            extended_options: ExtendedFileOptions {
                extra_data: vec![2, 0, 1, 0, 0].into(),
                central_extra_data: vec![
                    35, 229, 2, 0, 41, 41, 231, 44, 2, 0, 52, 233, 82, 201, 0, 0, 3, 0, 2, 0, 233,
                    255, 3, 0, 2, 0, 26, 154, 38, 251, 0, 0,
                ]
                .into(),
                file_comment: None,
            },
            alignment: 0xFFFF,
            ..Default::default()
        };
        assert!(writer.add_directory_from_path("", options).is_err());
        Ok(())
    }

    #[test]
    fn test_fuzz_crash_2024_06_14e() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let options = FileOptions {
            compression_method: Stored,
            compression_level: None,
            last_modified_time: DateTime::from_date_and_time(1988, 1, 1, 1, 6, 26)?,
            permissions: None,
            large_file: true,
            encrypt_with: None,
            extended_options: ExtendedFileOptions {
                extra_data: vec![76, 0, 1, 0, 0, 2, 0, 0, 0].into(),
                central_extra_data: vec![
                    1, 149, 1, 0, 255, 3, 0, 0, 0, 2, 255, 0, 0, 12, 65, 1, 0, 0, 67, 149, 0, 0,
                    76, 149, 2, 0, 149, 149, 67, 149, 0, 0,
                ]
                .into(),
                file_comment: None,
            },
            alignment: 0xFFFF,
            ..Default::default()
        };
        assert!(writer.add_directory_from_path("", options).is_err());
        let _ = writer.finish_into_readable()?;
        Ok(())
    }

    #[allow(deprecated)]
    #[test]
    fn test_fuzz_crash_2024_06_17() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let sub_writer = {
            let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
            writer.set_flush_on_finish_file(false);
            let sub_writer = {
                let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                writer.set_flush_on_finish_file(false);
                let sub_writer = {
                    let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                    writer.set_flush_on_finish_file(false);
                    let sub_writer = {
                        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                        writer.set_flush_on_finish_file(false);
                        let sub_writer = {
                            let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                            writer.set_flush_on_finish_file(false);
                            let sub_writer = {
                                let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                                writer.set_flush_on_finish_file(false);
                                let sub_writer = {
                                    let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                                    writer.set_flush_on_finish_file(false);
                                    let sub_writer = {
                                        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                                        writer.set_flush_on_finish_file(false);
                                        let sub_writer = {
                                            let mut writer =
                                                ZipWriter::new(Cursor::new(Vec::new()));
                                            writer.set_flush_on_finish_file(false);
                                            let options = FileOptions {
                                                compression_method: CompressionMethod::Unsupported(
                                                    0xFFFF,
                                                ),
                                                compression_level: Some(5),
                                                last_modified_time: DateTime::from_date_and_time(
                                                    2107, 2, 8, 15, 0, 0,
                                                )?,
                                                permissions: None,
                                                large_file: true,
                                                encrypt_with: Some(ZipCrypto(
                                                    ZipCryptoKeys::of(
                                                        0x63ff, 0xc62d3103, 0xfffe00ea,
                                                    ),
                                                    PhantomData,
                                                )),
                                                extended_options: ExtendedFileOptions {
                                                    extra_data: vec![].into(),
                                                    central_extra_data: vec![].into(),
                                                    file_comment: None,
                                                },
                                                alignment: 255,
                                                ..Default::default()
                                            };
                                            writer.add_symlink_from_path("1\0PK\u{6}\u{6}\u{b}\u{6}\u{6}\u{6}\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\u{1}\0\0\0\0\0\0\0\0\u{b}\0\0PK\u{1}\u{2},\0\0\0\0\0\0\0\0\0\0\0\u{10}\0\0\0K\u{6}\u{6}\0\0\0\0\0\0\0\0PK\u{2}\u{6}", "", options)?;
                                            writer = ZipWriter::new_append(
                                                writer.finish_into_readable()?.into_inner(),
                                            )?;
                                            writer
                                        };
                                        writer.merge_archive(sub_writer.finish_into_readable()?)?;
                                        writer = ZipWriter::new_append(
                                            writer.finish_into_readable()?.into_inner(),
                                        )?;
                                        let options = FileOptions {
                                            compression_method: Stored,
                                            compression_level: None,
                                            last_modified_time: DateTime::from_date_and_time(
                                                1992, 7, 3, 0, 0, 0,
                                            )?,
                                            permissions: None,
                                            large_file: true,
                                            encrypt_with: None,
                                            extended_options: ExtendedFileOptions {
                                                extra_data: vec![].into(),
                                                central_extra_data: vec![].into(),
                                                file_comment: None,
                                            },
                                            alignment: 43,
                                            ..Default::default()
                                        };
                                        writer.start_file_from_path(
                                            "\0\0\0\u{3}\0\u{1a}\u{1a}\u{1a}\u{1a}\u{1a}\u{1a}",
                                            options,
                                        )?;
                                        let options = FileOptions {
                                            compression_method: Stored,
                                            compression_level: None,
                                            last_modified_time: DateTime::from_date_and_time(
                                                2006, 3, 27, 2, 24, 26,
                                            )?,
                                            permissions: None,
                                            large_file: false,
                                            encrypt_with: None,
                                            extended_options: ExtendedFileOptions {
                                                extra_data: vec![].into(),
                                                central_extra_data: vec![].into(),
                                                file_comment: None,
                                            },
                                            alignment: 26,
                                            ..Default::default()
                                        };
                                        writer.start_file_from_path("\0K\u{6}\u{6}\0PK\u{6}\u{7}PK\u{6}\u{6}\0\0\0\0\0\0\0\0PK\u{2}\u{6}", options)?;
                                        writer = ZipWriter::new_append(
                                            writer.finish_into_readable()?.into_inner(),
                                        )?;
                                        let options = FileOptions {
                                            compression_method: Stored,
                                            compression_level: Some(17),
                                            last_modified_time: DateTime::from_date_and_time(
                                                2103, 4, 10, 23, 15, 18,
                                            )?,
                                            permissions: Some(3284386755),
                                            large_file: true,
                                            encrypt_with: Some(ZipCrypto(
                                                ZipCryptoKeys::of(
                                                    0x8888c5bf, 0x88888888, 0xff888888,
                                                ),
                                                PhantomData,
                                            )),
                                            extended_options: ExtendedFileOptions {
                                                extra_data: vec![3, 0, 1, 0, 255, 144, 136, 0, 0]
                                                    .into(),
                                                central_extra_data: vec![].into(),
                                                file_comment: None,
                                            },
                                            alignment: 0xFFFF,
                                            ..Default::default()
                                        };
                                        writer.add_symlink_from_path("", "\nu", options)?;
                                        writer = ZipWriter::new_append(writer.finish()?)?;
                                        writer
                                    };
                                    writer.merge_archive(sub_writer.finish_into_readable()?)?;
                                    writer = ZipWriter::new_append(
                                        writer.finish_into_readable()?.into_inner(),
                                    )?;
                                    writer
                                };
                                writer.merge_archive(sub_writer.finish_into_readable()?)?;
                                writer = ZipWriter::new_append(writer.finish()?)?;
                                writer
                            };
                            writer.merge_archive(sub_writer.finish_into_readable()?)?;
                            writer =
                                ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
                            writer.abort_file()?;
                            let options = FileOptions {
                                compression_method: CompressionMethod::Unsupported(49603),
                                compression_level: Some(20),
                                last_modified_time: DateTime::from_date_and_time(
                                    2047, 4, 14, 3, 15, 14,
                                )?,
                                permissions: Some(3284386755),
                                large_file: true,
                                encrypt_with: Some(ZipCrypto(
                                    ZipCryptoKeys::of(0xc3, 0x0, 0x0),
                                    PhantomData,
                                )),
                                extended_options: ExtendedFileOptions {
                                    extra_data: vec![].into(),
                                    central_extra_data: vec![].into(),
                                    file_comment: None,
                                },
                                alignment: 0,
                                ..Default::default()
                            };
                            writer.add_directory_from_path("", options)?;
                            writer.deep_copy_file_from_path("/", "")?;
                            writer.shallow_copy_file_from_path("", "copy")?;
                            assert!(writer.shallow_copy_file_from_path("", "copy").is_err());
                            assert!(writer.shallow_copy_file_from_path("", "copy").is_err());
                            assert!(writer.shallow_copy_file_from_path("", "copy").is_err());
                            assert!(writer.shallow_copy_file_from_path("", "copy").is_err());
                            assert!(writer.shallow_copy_file_from_path("", "copy").is_err());
                            assert!(writer.shallow_copy_file_from_path("", "copy").is_err());
                            writer
                        };
                        writer.merge_archive(sub_writer.finish_into_readable()?)?;
                        writer
                    };
                    writer.merge_archive(sub_writer.finish_into_readable()?)?;
                    writer
                };
                writer.merge_archive(sub_writer.finish_into_readable()?)?;
                writer
            };
            writer.merge_archive(sub_writer.finish_into_readable()?)?;
            writer
        };
        writer.merge_archive(sub_writer.finish_into_readable()?)?;
        let _ = writer.finish_into_readable()?;
        Ok(())
    }

    #[test]
    fn test_fuzz_crash_2024_06_17a() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        const PATH_1: &str = "\0I\01\0P\0\0\u{2}\0\0\u{1a}\u{1a}\u{1a}\u{1a}\u{1b}\u{1a}UT\u{5}\0\0\u{1a}\u{1a}\u{1a}\u{1a}UT\u{5}\0\u{1}\0\u{1a}\u{1a}\u{1a}UT\t\0uc\u{5}\0\0\0\0\u{7f}\u{7f}\u{7f}\u{7f}PK\u{6}";
        let sub_writer = {
            let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
            writer.set_flush_on_finish_file(false);
            let sub_writer = {
                let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                writer.set_flush_on_finish_file(false);
                let options = FileOptions {
                    compression_method: Stored,
                    compression_level: None,
                    last_modified_time: DateTime::from_date_and_time(1981, 1, 1, 0, 24, 21)?,
                    permissions: Some(16908288),
                    large_file: false,
                    encrypt_with: None,
                    extended_options: ExtendedFileOptions {
                        extra_data: vec![].into(),
                        central_extra_data: vec![].into(),
                        file_comment: None,
                    },
                    alignment: 20555,
                    ..Default::default()
                };
                writer.start_file_from_path(
                    "\0\u{7}\u{1}\0\0\0\0\0\0\0\0\u{1}\0\0PK\u{1}\u{2};",
                    options,
                )?;
                writer.write_all(
                    &([
                        255, 255, 255, 255, 253, 253, 253, 203, 203, 203, 253, 253, 253, 253, 255,
                        255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 249, 191, 225, 225,
                        241, 197,
                    ]),
                )?;
                writer.write_all(
                    &([
                        197, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
                        255, 75, 0,
                    ]),
                )?;
                writer
            };
            writer.merge_archive(sub_writer.finish_into_readable()?)?;
            writer = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
            let options = FileOptions {
                compression_method: Stored,
                compression_level: None,
                last_modified_time: DateTime::from_date_and_time(1980, 11, 14, 10, 46, 47)?,
                permissions: None,
                large_file: false,
                encrypt_with: None,
                extended_options: ExtendedFileOptions {
                    extra_data: vec![].into(),
                    central_extra_data: vec![].into(),
                    file_comment: None,
                },
                alignment: 0,
                ..Default::default()
            };
            writer.start_file_from_path(PATH_1, options)?;
            writer.deep_copy_file_from_path(PATH_1, "eee\u{6}\0\0\0\0\0\0\0\0\0\0\0$\0\0\0\0\0\0\u{7f}\u{7f}PK\u{6}\u{6}K\u{6}\u{6}\u{6}\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\u{1}\0\0\0\0\0\0\0\0\u{1}\0\0PK\u{1}\u{1e},\0\0\0\0\0\0\0\0\0\0\0\u{8}\0*\0\0\u{1}PK\u{6}\u{7}PK\u{6}\u{6}\0\0\0\0\0\0\0\0}K\u{2}\u{6}")?;
            writer
        };
        writer.merge_archive(sub_writer.finish_into_readable()?)?;
        writer = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
        writer.deep_copy_file_from_path(PATH_1, "")?;
        writer = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
        writer.shallow_copy_file_from_path("", "copy")?;
        writer = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
        let _ = writer.finish_into_readable()?;
        Ok(())
    }

    #[test]
    #[allow(clippy::octal_escapes)]
    #[cfg(all(feature = "_bzip2_any", not(miri)))]
    fn test_fuzz_crash_2024_06_17b() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let sub_writer = {
            let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
            writer.set_flush_on_finish_file(false);
            let sub_writer = {
                let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                writer.set_flush_on_finish_file(false);
                let sub_writer = {
                    let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                    writer.set_flush_on_finish_file(false);
                    let sub_writer = {
                        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                        writer.set_flush_on_finish_file(false);
                        let sub_writer = {
                            let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                            writer.set_flush_on_finish_file(false);
                            let sub_writer = {
                                let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                                writer.set_flush_on_finish_file(false);
                                let sub_writer = {
                                    let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                                    writer.set_flush_on_finish_file(false);
                                    let sub_writer = {
                                        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                                        writer.set_flush_on_finish_file(false);
                                        let options = FileOptions {
                                            compression_method: Stored,
                                            compression_level: None,
                                            last_modified_time: DateTime::from_date_and_time(
                                                1981, 1, 1, 0, 0, 21,
                                            )?,
                                            permissions: Some(16908288),
                                            large_file: false,
                                            encrypt_with: None,
                                            extended_options: ExtendedFileOptions {
                                                extra_data: vec![].into(),
                                                central_extra_data: vec![].into(),
                                                file_comment: None,
                                            },
                                            alignment: 20555,
                                            ..Default::default()
                                        };
                                        writer.start_file_from_path("\0\u{7}\u{1}\0\0\0\0\0\0\0\0\u{1}\0\0PK\u{1}\u{2};\u{1a}\u{18}\u{1a}UT\t.........................\0u", options)?;
                                        writer
                                    };
                                    writer.merge_archive(sub_writer.finish_into_readable()?)?;
                                    let options = FileOptions {
                                        compression_method: CompressionMethod::Bzip2,
                                        compression_level: Some(5),
                                        last_modified_time: DateTime::from_date_and_time(
                                            2055, 7, 7, 3, 6, 6,
                                        )?,
                                        permissions: None,
                                        large_file: false,
                                        encrypt_with: None,
                                        extended_options: ExtendedFileOptions {
                                            extra_data: vec![].into(),
                                            central_extra_data: vec![].into(),
                                            file_comment: None,
                                        },
                                        alignment: 0,
                                        ..Default::default()
                                    };
                                    writer.start_file_from_path("\0\0\0\0..\0\0\0\0\0\u{7f}\u{7f}PK\u{6}\u{6}K\u{6}\u{6}\u{6}\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\u{1}\0\0\0\0\0\0\0\0\u{1}\0\0PK\u{1}\u{1e},\0\0\0\0\0\0\0\0\0\0\0\u{8}\0*\0\0\u{1}PK\u{6}\u{7}PK\u{6}\u{6}\0\0\0\0\0\0\0\0}K\u{2}\u{6}", options)?;
                                    writer = ZipWriter::new_append(
                                        writer.finish_into_readable()?.into_inner(),
                                    )?;
                                    writer
                                };
                                writer.merge_archive(sub_writer.finish_into_readable()?)?;
                                writer = ZipWriter::new_append(
                                    writer.finish_into_readable()?.into_inner(),
                                )?;
                                writer
                            };
                            writer.merge_archive(sub_writer.finish_into_readable()?)?;
                            writer =
                                ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
                            writer
                        };
                        writer.merge_archive(sub_writer.finish_into_readable()?)?;
                        writer =
                            ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
                        writer
                    };
                    writer.merge_archive(sub_writer.finish_into_readable()?)?;
                    writer
                };
                writer.merge_archive(sub_writer.finish_into_readable()?)?;
                writer
            };
            writer.merge_archive(sub_writer.finish_into_readable()?)?;
            writer
        };
        writer.merge_archive(sub_writer.finish_into_readable()?)?;
        let _ = writer.finish_into_readable()?;
        Ok(())
    }

    #[test]
    fn test_fuzz_crash_2024_06_18() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer
            .set_raw_comment(Box::<[u8]>::from([
                80, 75, 5, 6, 255, 255, 255, 255, 255, 255, 80, 75, 5, 6, 255, 255, 255, 255, 255,
                255, 13, 0, 13, 13, 13, 13, 13, 255, 255, 255, 255, 255, 255, 255, 255,
            ]))
            .unwrap();
        let sub_writer = {
            let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
            writer.set_flush_on_finish_file(false);
            writer.set_raw_comment(Box::new([])).unwrap();
            writer
        };
        writer.merge_archive(sub_writer.finish_into_readable()?)?;
        writer = ZipWriter::new_append(writer.finish()?)?;
        let _ = writer.finish_into_readable()?;
        Ok(())
    }

    #[test]
    fn test_fuzz_crash_2024_06_18a() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        writer.set_raw_comment(Box::<[u8]>::from([])).unwrap();
        let sub_writer = {
            let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
            writer.set_flush_on_finish_file(false);
            let sub_writer = {
                let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                writer.set_flush_on_finish_file(false);
                let sub_writer = {
                    let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
                    writer.set_flush_on_finish_file(false);
                    let options = FullFileOptions {
                        compression_method: Stored,
                        compression_level: None,
                        last_modified_time: DateTime::from_date_and_time(2107, 4, 8, 14, 0, 19)?,
                        permissions: None,
                        large_file: false,
                        encrypt_with: None,
                        extended_options: ExtendedFileOptions {
                            extra_data: vec![
                                182, 180, 1, 0, 180, 182, 74, 0, 0, 200, 0, 0, 0, 2, 0, 0, 0,
                            ]
                            .into(),
                            central_extra_data: vec![].into(),
                            file_comment: None,
                        },
                        alignment: 1542,
                        ..Default::default()
                    };
                    writer.start_file_from_path("\0\0PK\u{6}\u{6}K\u{6}PK\u{3}\u{4}\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\u{1}\0\0\0\0\0\0\0\0\u{1}\u{1}\0PK\u{1}\u{2},\0\0\0\0\0\0\0\0\0\0\0P\u{7}\u{4}/.\0KP\0\0;\0\0\0\u{1e}\0\0\0\0\0\0\0\0\0\0\0\0\0", options)?;
                    let finished = writer.finish_into_readable()?;
                    assert_eq!(1, finished.file_names().count());
                    writer = ZipWriter::new_append(finished.into_inner())?;
                    let options = FullFileOptions {
                        compression_method: Stored,
                        compression_level: Some(5),
                        last_modified_time: DateTime::from_date_and_time(2107, 4, 1, 0, 0, 0)?,
                        permissions: None,
                        large_file: false,
                        encrypt_with: Some(ZipCrypto(
                            ZipCryptoKeys::of(0x0, 0x62e4b50, 0x100),
                            PhantomData,
                        )),
                        ..Default::default()
                    };
                    writer.add_symlink_from_path(
                        "\0K\u{6}\0PK\u{6}\u{7}PK\u{6}\u{6}\0\0\0\0\0\0\0\0PK\u{2}\u{6}",
                        "\u{8}\0\0\0\0/\0",
                        options,
                    )?;
                    let finished = writer.finish_into_readable()?;
                    assert_eq!(2, finished.file_names().count());
                    writer = ZipWriter::new_append(finished.into_inner())?;
                    assert_eq!(2, writer.files.len());
                    writer
                };
                let finished = sub_writer.finish_into_readable()?;
                assert_eq!(2, finished.file_names().count());
                writer.merge_archive(finished)?;
                writer = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
                writer
            };
            writer.merge_archive(sub_writer.finish_into_readable()?)?;
            writer
        };
        writer.merge_archive(sub_writer.finish_into_readable()?)?;
        let _ = writer.finish_into_readable()?;
        Ok(())
    }

    #[cfg(all(feature = "_bzip2_any", feature = "aes-crypto", not(miri)))]
    #[test]
    fn test_fuzz_crash_2024_06_18b() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(true);
        writer.set_raw_comment([0].into())?;
        writer = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
        assert_eq!(writer.get_raw_comment()[0], 0);
        let options = FileOptions {
            compression_method: CompressionMethod::Bzip2,
            compression_level: None,
            last_modified_time: DateTime::from_date_and_time(2009, 6, 3, 13, 37, 39)?,
            permissions: Some(2644352413),
            large_file: true,
            encrypt_with: Some(crate::write::EncryptWith::Aes {
                mode: crate::AesMode::Aes256,
                password: &[],
                salt: None,
            }),
            extended_options: ExtendedFileOptions {
                extra_data: vec![].into(),
                central_extra_data: vec![].into(),
                file_comment: None,
            },
            alignment: 255,
            ..Default::default()
        };
        writer.add_symlink_from_path("", "", options)?;
        writer.deep_copy_file_from_path("", "PK\u{5}\u{6}\0\0\0\0\0\0\0\0\0\0\0\0\0\u{4}\0\0\0")?;
        writer = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
        assert_eq!(writer.get_raw_comment()[0], 0);
        writer.deep_copy_file_from_path(
            "PK\u{5}\u{6}\0\0\0\0\0\0\0\0\0\0\0\0\0\u{4}\0\0\0",
            "\u{2}yy\u{5}qu\0",
        )?;
        let finished = writer.finish()?;
        let archive = ZipArchive::new(finished.clone())?;
        assert_eq!(archive.comment(), [0]);
        writer = ZipWriter::new_append(finished)?;
        assert_eq!(writer.get_raw_comment()[0], 0);
        let _ = writer.finish_into_readable()?;
        Ok(())
    }

    #[test]
    fn test_fuzz_crash_2024_06_19() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let options = FileOptions {
            compression_method: Stored,
            compression_level: None,
            last_modified_time: DateTime::from_date_and_time(1980, 3, 1, 19, 55, 58)?,
            permissions: None,
            large_file: false,
            encrypt_with: None,
            extended_options: ExtendedFileOptions {
                extra_data: vec![].into(),
                central_extra_data: vec![].into(),
                file_comment: None,
            },
            alignment: 256,
            ..Default::default()
        };
        writer.start_file_from_path(
            "\0\0\0PK\u{5}\u{6}\0\0\0\0\u{1}\0\u{12}\u{6}\0\0\0\0\0\u{1}\0\0\0\0\0\0\0\0\0",
            options,
        )?;
        writer.set_flush_on_finish_file(false);
        writer.shallow_copy_file_from_path(
            "\0\0\0PK\u{5}\u{6}\0\0\0\0\u{1}\0\u{12}\u{6}\0\0\0\0\0\u{1}\0\0\0\0\0\0\0\0\0",
            "",
        )?;
        writer.set_flush_on_finish_file(false);
        writer.deep_copy_file_from_path("", "copy")?;
        writer.abort_file()?;
        writer.set_flush_on_finish_file(false);
        writer.set_raw_comment([255, 0].into())?;
        writer.abort_file()?;
        assert_eq!(writer.get_raw_comment(), [255, 0]);
        writer = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
        assert_eq!(writer.get_raw_comment(), [255, 0]);
        writer.set_flush_on_finish_file(false);
        let options = FileOptions {
            compression_method: Stored,
            compression_level: None,
            last_modified_time: DateTime::default(),
            permissions: None,
            large_file: false,
            encrypt_with: None,
            extended_options: ExtendedFileOptions {
                extra_data: vec![].into(),
                central_extra_data: vec![].into(),
                file_comment: None,
            },
            ..Default::default()
        };
        writer.start_file_from_path("", options)?;
        assert_eq!(writer.get_raw_comment(), [255, 0]);
        let archive = writer.finish_into_readable()?;
        assert_eq!(archive.comment(), [255, 0]);
        Ok(())
    }

    #[test]
    fn fuzz_crash_2024_06_21() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let options = FullFileOptions {
            compression_method: Stored,
            compression_level: None,
            last_modified_time: DateTime::from_date_and_time(1980, 2, 1, 0, 0, 0)?,
            permissions: None,
            large_file: false,
            encrypt_with: None,
            ..Default::default()
        };
        const LONG_PATH: &str = "\0@PK\u{6}\u{6}\u{7}\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0@/\0\0\00ΝPK\u{5}\u{6}O\0\u{10}\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0@PK\u{6}\u{7}\u{6}\0/@\0\0\0\0\0\0\0\0 \0\0";
        writer.start_file_from_path(LONG_PATH, options)?;
        writer = ZipWriter::new_append(writer.finish()?)?;
        writer.deep_copy_file_from_path(LONG_PATH, "oo\0\0\0")?;
        writer.abort_file()?;
        writer.set_raw_comment([33].into())?;
        let archive = writer.finish_into_readable()?;
        writer = ZipWriter::new_append(archive.into_inner())?;
        assert!(writer.get_raw_comment().starts_with(&[33]));
        let archive = writer.finish_into_readable()?;
        assert!(archive.comment().starts_with(&[33]));
        Ok(())
    }

    #[test]
    #[cfg(all(feature = "_bzip2_any", not(miri)))]
    fn fuzz_crash_2024_07_17() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let options = FileOptions {
            compression_method: CompressionMethod::Bzip2,
            compression_level: None,
            last_modified_time: DateTime::from_date_and_time(2095, 2, 16, 21, 0, 1)?,
            permissions: Some(84238341),
            large_file: true,
            encrypt_with: None,
            extended_options: ExtendedFileOptions {
                extra_data: vec![117, 99, 6, 0, 0, 0, 0, 0, 0, 0, 2, 1, 0, 0, 2, 0, 0, 0].into(),
                central_extra_data: vec![].into(),
                file_comment: None,
            },
            alignment: 0xFFFF,
            ..Default::default()
        };
        writer.start_file_from_path("", options)?;
        //writer = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
        writer.deep_copy_file_from_path("", "copy")?;
        let _ = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
        Ok(())
    }

    #[test]
    fn fuzz_crash_2024_07_19() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let options = FileOptions {
            compression_method: Stored,
            compression_level: None,
            last_modified_time: DateTime::from_date_and_time(1980, 6, 1, 0, 34, 47)?,
            permissions: None,
            large_file: true,
            encrypt_with: None,
            extended_options: ExtendedFileOptions {
                extra_data: vec![].into(),
                central_extra_data: vec![].into(),
                file_comment: None,
            },
            alignment: 45232,
            ..Default::default()
        };
        writer.add_directory_from_path("", options)?;
        writer.deep_copy_file_from_path("/", "")?;
        writer = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
        writer.deep_copy_file_from_path("", "copy")?;
        let _ = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
        Ok(())
    }

    #[test]
    #[cfg(feature = "aes-crypto")]
    fn fuzz_crash_2024_07_19a() -> ZipResult<()> {
        use crate::AesMode::Aes128;
        use crate::write::EncryptWith::Aes;
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(false);
        let options = FileOptions {
            compression_method: Stored,
            compression_level: None,
            last_modified_time: DateTime::from_date_and_time(2107, 6, 5, 13, 0, 21)?,
            permissions: None,
            large_file: true,
            encrypt_with: Some(Aes {
                mode: Aes128,
                password: &[],
                salt: None,
            }),
            extended_options: ExtendedFileOptions {
                extra_data: vec![3, 0, 4, 0, 209, 53, 53, 8, 2, 61, 0, 0].into(),
                central_extra_data: vec![].into(),
                file_comment: None,
            },
            alignment: 0xFFFF,
            ..Default::default()
        };
        writer.start_file_from_path("", options)?;
        let _ = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
        Ok(())
    }

    #[test]
    fn fuzz_crash_2024_07_20() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        writer.set_flush_on_finish_file(true);
        let options = FileOptions {
            compression_method: Stored,
            compression_level: None,
            last_modified_time: DateTime::from_date_and_time(2041, 8, 2, 19, 38, 0)?,
            permissions: None,
            large_file: false,
            encrypt_with: None,
            extended_options: ExtendedFileOptions {
                extra_data: vec![].into(),
                central_extra_data: vec![].into(),
                file_comment: None,
            },
            alignment: 0,
            ..Default::default()
        };
        writer.add_directory_from_path("\0\0\0\0\0\0\07黻", options)?;
        let sub_writer = {
            let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
            writer.set_flush_on_finish_file(false);
            let options = FileOptions {
                compression_method: Stored,
                compression_level: None,
                last_modified_time: DateTime::default(),
                permissions: None,
                large_file: false,
                encrypt_with: None,
                extended_options: ExtendedFileOptions {
                    extra_data: vec![].into(),
                    central_extra_data: vec![].into(),
                    file_comment: None,
                },
                alignment: 4,
                ..Default::default()
            };
            writer.add_directory_from_path("\0\0\0黻", options)?;
            writer = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
            writer.abort_file()?;
            let options = FileOptions {
                compression_method: Stored,
                compression_level: None,
                last_modified_time: DateTime::from_date_and_time(1980, 1, 1, 0, 7, 0)?,
                permissions: Some(2663103419),
                large_file: false,
                encrypt_with: None,
                extended_options: ExtendedFileOptions {
                    extra_data: vec![].into(),
                    central_extra_data: vec![].into(),
                    file_comment: None,
                },
                alignment: 32256,
                ..Default::default()
            };
            writer.add_directory_from_path("\0", options)?;
            writer = ZipWriter::new_append(writer.finish()?)?;
            writer
        };
        writer.merge_archive(sub_writer.finish_into_readable()?)?;
        let _ = ZipWriter::new_append(writer.finish_into_readable()?.into_inner())?;
        Ok(())
    }

    #[test]
    fn fuzz_crash_2024_07_21() -> ZipResult<()> {
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        let sub_writer = {
            let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
            writer.add_directory_from_path(
                "",
                FileOptions {
                    compression_method: Stored,
                    compression_level: None,
                    last_modified_time: DateTime::from_date_and_time(2105, 8, 1, 15, 0, 0)?,
                    permissions: None,
                    large_file: false,
                    encrypt_with: None,
                    extended_options: ExtendedFileOptions {
                        extra_data: vec![].into(),
                        central_extra_data: vec![].into(),
                        file_comment: None,
                    },
                    alignment: 0,
                    ..Default::default()
                },
            )?;
            writer.abort_file()?;
            let mut writer = ZipWriter::new_append(writer.finish()?)?;
            writer.add_directory_from_path(
                "",
                FileOptions {
                    compression_method: Stored,
                    compression_level: None,
                    last_modified_time: DateTime::default(),
                    permissions: None,
                    large_file: false,
                    encrypt_with: None,
                    extended_options: ExtendedFileOptions {
                        extra_data: vec![].into(),
                        central_extra_data: vec![].into(),
                        file_comment: None,
                    },
                    alignment: 16,
                    ..Default::default()
                },
            )?;
            ZipWriter::new_append(writer.finish()?)?
        };
        writer.merge_archive(sub_writer.finish_into_readable()?)?;
        let writer = ZipWriter::new_append(writer.finish()?)?;
        let _ = writer.finish_into_readable()?;

        Ok(())
    }

    #[test]
    fn test_explicit_system_roundtrip() -> ZipResult<()> {
        // Test round-trip: write with various systems, read back and verify
        let systems = vec![System::Unix, System::Dos, System::WindowsNTFS];

        for system in systems {
            let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
            let options = SimpleFileOptions::default()
                .compression_method(Stored)
                .system(system);

            let filename = format!("test_{:?}.txt", system);
            writer.start_file(&filename, options)?;
            writer.write_all(b"content")?;

            // Write and read back
            let bytes = writer.finish()?.into_inner();
            let mut reader = ZipArchive::new(Cursor::new(bytes))?;

            let file = reader.by_index(0)?;
            assert_eq!(
                file.get_metadata().system,
                system,
                "System mismatch for {:?}",
                system
            );
        }

        Ok(())
    }

    #[test]
    fn test_system_default_behavior() -> ZipResult<()> {
        // Test that when system is not set, default behavior is preserved
        let mut writer = ZipWriter::new(Cursor::new(Vec::new()));
        let options = SimpleFileOptions::default().compression_method(Stored);

        writer.start_file("test.txt", options)?;
        writer.write_all(b"test")?;

        let bytes = writer.finish()?.into_inner();
        let mut reader = ZipArchive::new(Cursor::new(bytes))?;

        let file = reader.by_index(0)?;
        let expected_system = if cfg!(windows) {
            System::Dos
        } else {
            System::Unix
        };
        assert_eq!(file.get_metadata().system, expected_system);

        Ok(())
    }
}