Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

1 files changed, 772 insertions, 0 deletions

diff --git a/vendor/flate2/src/mem.rs b/vendor/flate2/src/mem.rs
new file mode 100644
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+++ b/vendor/flate2/src/mem.rs
@@ -0,0 +1,772 @@
+use std::error::Error;
+use std::fmt;
+use std::io;
+
+use crate::ffi::{self, Backend, Deflate, DeflateBackend, ErrorMessage, Inflate, InflateBackend};
+use crate::Compression;
+
+/// Raw in-memory compression stream for blocks of data.
+///
+/// This type is the building block for the I/O streams in the rest of this
+/// crate. It requires more management than the [`Read`]/[`Write`] API but is
+/// maximally flexible in terms of accepting input from any source and being
+/// able to produce output to any memory location.
+///
+/// It is recommended to use the I/O stream adaptors over this type as they're
+/// easier to use.
+///
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+/// [`Write`]: https://doc.rust-lang.org/std/io/trait.Write.html
+#[derive(Debug)]
+pub struct Compress {
+    inner: Deflate,
+}
+
+/// Raw in-memory decompression stream for blocks of data.
+///
+/// This type is the building block for the I/O streams in the rest of this
+/// crate. It requires more management than the [`Read`]/[`Write`] API but is
+/// maximally flexible in terms of accepting input from any source and being
+/// able to produce output to any memory location.
+///
+/// It is recommended to use the I/O stream adaptors over this type as they're
+/// easier to use.
+///
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+/// [`Write`]: https://doc.rust-lang.org/std/io/trait.Write.html
+#[derive(Debug)]
+pub struct Decompress {
+    inner: Inflate,
+}
+
+/// Values which indicate the form of flushing to be used when compressing
+/// in-memory data.
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+#[non_exhaustive]
+pub enum FlushCompress {
+    /// A typical parameter for passing to compression/decompression functions,
+    /// this indicates that the underlying stream to decide how much data to
+    /// accumulate before producing output in order to maximize compression.
+    None = ffi::MZ_NO_FLUSH as isize,
+
+    /// All pending output is flushed to the output buffer and the output is
+    /// aligned on a byte boundary so that the decompressor can get all input
+    /// data available so far.
+    ///
+    /// Flushing may degrade compression for some compression algorithms and so
+    /// it should only be used when necessary. This will complete the current
+    /// deflate block and follow it with an empty stored block.
+    Sync = ffi::MZ_SYNC_FLUSH as isize,
+
+    /// All pending output is flushed to the output buffer, but the output is
+    /// not aligned to a byte boundary.
+    ///
+    /// All of the input data so far will be available to the decompressor (as
+    /// with `Flush::Sync`. This completes the current deflate block and follows
+    /// it with an empty fixed codes block that is 10 bites long, and it assures
+    /// that enough bytes are output in order for the decompressor to finish the
+    /// block before the empty fixed code block.
+    Partial = ffi::MZ_PARTIAL_FLUSH as isize,
+
+    /// All output is flushed as with `Flush::Sync` and the compression state is
+    /// reset so decompression can restart from this point if previous
+    /// compressed data has been damaged or if random access is desired.
+    ///
+    /// Using this option too often can seriously degrade compression.
+    Full = ffi::MZ_FULL_FLUSH as isize,
+
+    /// Pending input is processed and pending output is flushed.
+    ///
+    /// The return value may indicate that the stream is not yet done and more
+    /// data has yet to be processed.
+    Finish = ffi::MZ_FINISH as isize,
+}
+
+/// Values which indicate the form of flushing to be used when
+/// decompressing in-memory data.
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+#[non_exhaustive]
+pub enum FlushDecompress {
+    /// A typical parameter for passing to compression/decompression functions,
+    /// this indicates that the underlying stream to decide how much data to
+    /// accumulate before producing output in order to maximize compression.
+    None = ffi::MZ_NO_FLUSH as isize,
+
+    /// All pending output is flushed to the output buffer and the output is
+    /// aligned on a byte boundary so that the decompressor can get all input
+    /// data available so far.
+    ///
+    /// Flushing may degrade compression for some compression algorithms and so
+    /// it should only be used when necessary. This will complete the current
+    /// deflate block and follow it with an empty stored block.
+    Sync = ffi::MZ_SYNC_FLUSH as isize,
+
+    /// Pending input is processed and pending output is flushed.
+    ///
+    /// The return value may indicate that the stream is not yet done and more
+    /// data has yet to be processed.
+    Finish = ffi::MZ_FINISH as isize,
+}
+
+/// The inner state for an error when decompressing
+#[derive(Debug)]
+pub(crate) enum DecompressErrorInner {
+    General { msg: ErrorMessage },
+    NeedsDictionary(u32),
+}
+
+/// Error returned when a decompression object finds that the input stream of
+/// bytes was not a valid input stream of bytes.
+#[derive(Debug)]
+pub struct DecompressError(pub(crate) DecompressErrorInner);
+
+impl DecompressError {
+    /// Indicates whether decompression failed due to requiring a dictionary.
+    ///
+    /// The resulting integer is the Adler-32 checksum of the dictionary
+    /// required.
+    pub fn needs_dictionary(&self) -> Option<u32> {
+        match self.0 {
+            DecompressErrorInner::NeedsDictionary(adler) => Some(adler),
+            _ => None,
+        }
+    }
+}
+
+#[inline]
+pub(crate) fn decompress_failed<T>(msg: ErrorMessage) -> Result<T, DecompressError> {
+    Err(DecompressError(DecompressErrorInner::General { msg }))
+}
+
+#[inline]
+pub(crate) fn decompress_need_dict<T>(adler: u32) -> Result<T, DecompressError> {
+    Err(DecompressError(DecompressErrorInner::NeedsDictionary(
+        adler,
+    )))
+}
+
+/// Error returned when a compression object is used incorrectly or otherwise
+/// generates an error.
+#[derive(Debug)]
+pub struct CompressError {
+    pub(crate) msg: ErrorMessage,
+}
+
+#[inline]
+pub(crate) fn compress_failed<T>(msg: ErrorMessage) -> Result<T, CompressError> {
+    Err(CompressError { msg })
+}
+
+/// Possible status results of compressing some data or successfully
+/// decompressing a block of data.
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+pub enum Status {
+    /// Indicates success.
+    ///
+    /// Means that more input may be needed but isn't available
+    /// and/or there's more output to be written but the output buffer is full.
+    Ok,
+
+    /// Indicates that forward progress is not possible due to input or output
+    /// buffers being empty.
+    ///
+    /// For compression it means the input buffer needs some more data or the
+    /// output buffer needs to be freed up before trying again.
+    ///
+    /// For decompression this means that more input is needed to continue or
+    /// the output buffer isn't large enough to contain the result. The function
+    /// can be called again after fixing both.
+    BufError,
+
+    /// Indicates that all input has been consumed and all output bytes have
+    /// been written. Decompression/compression should not be called again.
+    ///
+    /// For decompression with zlib streams the adler-32 of the decompressed
+    /// data has also been verified.
+    StreamEnd,
+}
+
+impl Compress {
+    /// Creates a new object ready for compressing data that it's given.
+    ///
+    /// The `level` argument here indicates what level of compression is going
+    /// to be performed, and the `zlib_header` argument indicates whether the
+    /// output data should have a zlib header or not.
+    pub fn new(level: Compression, zlib_header: bool) -> Compress {
+        Compress {
+            inner: Deflate::make(level, zlib_header, ffi::MZ_DEFAULT_WINDOW_BITS as u8),
+        }
+    }
+
+    /// Creates a new object ready for compressing data that it's given.
+    ///
+    /// The `level` argument here indicates what level of compression is going
+    /// to be performed, and the `zlib_header` argument indicates whether the
+    /// output data should have a zlib header or not. The `window_bits` parameter
+    /// indicates the base-2 logarithm of the sliding window size and must be
+    /// between 9 and 15.
+    ///
+    /// # Panics
+    ///
+    /// If `window_bits` does not fall into the range 9 ..= 15,
+    /// `new_with_window_bits` will panic.
+    #[cfg(feature = "any_zlib")]
+    pub fn new_with_window_bits(
+        level: Compression,
+        zlib_header: bool,
+        window_bits: u8,
+    ) -> Compress {
+        assert!(
+            window_bits > 8 && window_bits < 16,
+            "window_bits must be within 9 ..= 15"
+        );
+        Compress {
+            inner: Deflate::make(level, zlib_header, window_bits),
+        }
+    }
+
+    /// Creates a new object ready for compressing data that it's given.
+    ///
+    /// The `level` argument here indicates what level of compression is going
+    /// to be performed.
+    ///
+    /// The Compress object produced by this constructor outputs gzip headers
+    /// for the compressed data.
+    ///
+    /// # Panics
+    ///
+    /// If `window_bits` does not fall into the range 9 ..= 15,
+    /// `new_with_window_bits` will panic.
+    #[cfg(feature = "any_zlib")]
+    pub fn new_gzip(level: Compression, window_bits: u8) -> Compress {
+        assert!(
+            window_bits > 8 && window_bits < 16,
+            "window_bits must be within 9 ..= 15"
+        );
+        Compress {
+            inner: Deflate::make(level, true, window_bits + 16),
+        }
+    }
+
+    /// Returns the total number of input bytes which have been processed by
+    /// this compression object.
+    pub fn total_in(&self) -> u64 {
+        self.inner.total_in()
+    }
+
+    /// Returns the total number of output bytes which have been produced by
+    /// this compression object.
+    pub fn total_out(&self) -> u64 {
+        self.inner.total_out()
+    }
+
+    /// Specifies the compression dictionary to use.
+    ///
+    /// Returns the Adler-32 checksum of the dictionary.
+    #[cfg(feature = "any_zlib")]
+    pub fn set_dictionary(&mut self, dictionary: &[u8]) -> Result<u32, CompressError> {
+        let stream = &mut *self.inner.inner.stream_wrapper;
+        stream.msg = std::ptr::null_mut();
+        let rc = unsafe {
+            assert!(dictionary.len() < ffi::uInt::MAX as usize);
+            ffi::deflateSetDictionary(stream, dictionary.as_ptr(), dictionary.len() as ffi::uInt)
+        };
+
+        match rc {
+            ffi::MZ_STREAM_ERROR => compress_failed(self.inner.inner.msg()),
+            ffi::MZ_OK => Ok(stream.adler as u32),
+            c => panic!("unknown return code: {}", c),
+        }
+    }
+
+    /// Quickly resets this compressor without having to reallocate anything.
+    ///
+    /// This is equivalent to dropping this object and then creating a new one.
+    pub fn reset(&mut self) {
+        self.inner.reset();
+    }
+
+    /// Dynamically updates the compression level.
+    ///
+    /// This can be used to switch between compression levels for different
+    /// kinds of data, or it can be used in conjunction with a call to reset
+    /// to reuse the compressor.
+    ///
+    /// This may return an error if there wasn't enough output space to complete
+    /// the compression of the available input data before changing the
+    /// compression level. Flushing the stream before calling this method
+    /// ensures that the function will succeed on the first call.
+    #[cfg(feature = "any_zlib")]
+    pub fn set_level(&mut self, level: Compression) -> Result<(), CompressError> {
+        use std::os::raw::c_int;
+        let stream = &mut *self.inner.inner.stream_wrapper;
+        stream.msg = std::ptr::null_mut();
+
+        let rc = unsafe { ffi::deflateParams(stream, level.0 as c_int, ffi::MZ_DEFAULT_STRATEGY) };
+
+        match rc {
+            ffi::MZ_OK => Ok(()),
+            ffi::MZ_BUF_ERROR => compress_failed(self.inner.inner.msg()),
+            c => panic!("unknown return code: {}", c),
+        }
+    }
+
+    /// Compresses the input data into the output, consuming only as much
+    /// input as needed and writing as much output as possible.
+    ///
+    /// The flush option can be any of the available `FlushCompress` parameters.
+    ///
+    /// To learn how much data was consumed or how much output was produced, use
+    /// the `total_in` and `total_out` functions before/after this is called.
+    pub fn compress(
+        &mut self,
+        input: &[u8],
+        output: &mut [u8],
+        flush: FlushCompress,
+    ) -> Result<Status, CompressError> {
+        self.inner.compress(input, output, flush)
+    }
+
+    /// Compresses the input data into the extra space of the output, consuming
+    /// only as much input as needed and writing as much output as possible.
+    ///
+    /// This function has the same semantics as `compress`, except that the
+    /// length of `vec` is managed by this function. This will not reallocate
+    /// the vector provided or attempt to grow it, so space for the output must
+    /// be reserved in the output vector by the caller before calling this
+    /// function.
+    pub fn compress_vec(
+        &mut self,
+        input: &[u8],
+        output: &mut Vec<u8>,
+        flush: FlushCompress,
+    ) -> Result<Status, CompressError> {
+        write_to_spare_capacity_of_vec(output, |out| {
+            let before = self.total_out();
+            let ret = self.compress(input, out, flush);
+            let bytes_written = self.total_out() - before;
+            (bytes_written as usize, ret)
+        })
+    }
+}
+
+impl Decompress {
+    /// Creates a new object ready for decompressing data that it's given.
+    ///
+    /// The `zlib_header` argument indicates whether the input data is expected
+    /// to have a zlib header or not.
+    pub fn new(zlib_header: bool) -> Decompress {
+        Decompress {
+            inner: Inflate::make(zlib_header, ffi::MZ_DEFAULT_WINDOW_BITS as u8),
+        }
+    }
+
+    /// Creates a new object ready for decompressing data that it's given.
+    ///
+    /// The `zlib_header` argument indicates whether the input data is expected
+    /// to have a zlib header or not. The `window_bits` parameter indicates the
+    /// base-2 logarithm of the sliding window size and must be between 9 and 15.
+    ///
+    /// # Panics
+    ///
+    /// If `window_bits` does not fall into the range 9 ..= 15,
+    /// `new_with_window_bits` will panic.
+    #[cfg(feature = "any_zlib")]
+    pub fn new_with_window_bits(zlib_header: bool, window_bits: u8) -> Decompress {
+        assert!(
+            window_bits > 8 && window_bits < 16,
+            "window_bits must be within 9 ..= 15"
+        );
+        Decompress {
+            inner: Inflate::make(zlib_header, window_bits),
+        }
+    }
+
+    /// Creates a new object ready for decompressing data that it's given.
+    ///
+    /// The Decompress object produced by this constructor expects gzip headers
+    /// for the compressed data.
+    ///
+    /// # Panics
+    ///
+    /// If `window_bits` does not fall into the range 9 ..= 15,
+    /// `new_with_window_bits` will panic.
+    #[cfg(feature = "any_zlib")]
+    pub fn new_gzip(window_bits: u8) -> Decompress {
+        assert!(
+            window_bits > 8 && window_bits < 16,
+            "window_bits must be within 9 ..= 15"
+        );
+        Decompress {
+            inner: Inflate::make(true, window_bits + 16),
+        }
+    }
+
+    /// Returns the total number of input bytes which have been processed by
+    /// this decompression object.
+    pub fn total_in(&self) -> u64 {
+        self.inner.total_in()
+    }
+
+    /// Returns the total number of output bytes which have been produced by
+    /// this decompression object.
+    pub fn total_out(&self) -> u64 {
+        self.inner.total_out()
+    }
+
+    /// Decompresses the input data into the output, consuming only as much
+    /// input as needed and writing as much output as possible.
+    ///
+    /// The flush option can be any of the available `FlushDecompress` parameters.
+    ///
+    /// If the first call passes `FlushDecompress::Finish` it is assumed that
+    /// the input and output buffers are both sized large enough to decompress
+    /// the entire stream in a single call.
+    ///
+    /// A flush value of `FlushDecompress::Finish` indicates that there are no
+    /// more source bytes available beside what's already in the input buffer,
+    /// and the output buffer is large enough to hold the rest of the
+    /// decompressed data.
+    ///
+    /// To learn how much data was consumed or how much output was produced, use
+    /// the `total_in` and `total_out` functions before/after this is called.
+    ///
+    /// # Errors
+    ///
+    /// If the input data to this instance of `Decompress` is not a valid
+    /// zlib/deflate stream then this function may return an instance of
+    /// `DecompressError` to indicate that the stream of input bytes is corrupted.
+    pub fn decompress(
+        &mut self,
+        input: &[u8],
+        output: &mut [u8],
+        flush: FlushDecompress,
+    ) -> Result<Status, DecompressError> {
+        self.inner.decompress(input, output, flush)
+    }
+
+    /// Decompresses the input data into the extra space in the output vector
+    /// specified by `output`.
+    ///
+    /// This function has the same semantics as `decompress`, except that the
+    /// length of `vec` is managed by this function. This will not reallocate
+    /// the vector provided or attempt to grow it, so space for the output must
+    /// be reserved in the output vector by the caller before calling this
+    /// function.
+    ///
+    /// # Errors
+    ///
+    /// If the input data to this instance of `Decompress` is not a valid
+    /// zlib/deflate stream then this function may return an instance of
+    /// `DecompressError` to indicate that the stream of input bytes is corrupted.
+    pub fn decompress_vec(
+        &mut self,
+        input: &[u8],
+        output: &mut Vec<u8>,
+        flush: FlushDecompress,
+    ) -> Result<Status, DecompressError> {
+        write_to_spare_capacity_of_vec(output, |out| {
+            let before = self.total_out();
+            let ret = self.decompress(input, out, flush);
+            let bytes_written = self.total_out() - before;
+            (bytes_written as usize, ret)
+        })
+    }
+
+    /// Specifies the decompression dictionary to use.
+    #[cfg(feature = "any_zlib")]
+    pub fn set_dictionary(&mut self, dictionary: &[u8]) -> Result<u32, DecompressError> {
+        let stream = &mut *self.inner.inner.stream_wrapper;
+        stream.msg = std::ptr::null_mut();
+        let rc = unsafe {
+            assert!(dictionary.len() < ffi::uInt::MAX as usize);
+            ffi::inflateSetDictionary(stream, dictionary.as_ptr(), dictionary.len() as ffi::uInt)
+        };
+
+        match rc {
+            ffi::MZ_STREAM_ERROR => decompress_failed(self.inner.inner.msg()),
+            ffi::MZ_DATA_ERROR => decompress_need_dict(stream.adler as u32),
+            ffi::MZ_OK => Ok(stream.adler as u32),
+            c => panic!("unknown return code: {}", c),
+        }
+    }
+
+    /// Performs the equivalent of replacing this decompression state with a
+    /// freshly allocated copy.
+    ///
+    /// This function may not allocate memory, though, and attempts to reuse any
+    /// previously existing resources.
+    ///
+    /// The argument provided here indicates whether the reset state will
+    /// attempt to decode a zlib header first or not.
+    pub fn reset(&mut self, zlib_header: bool) {
+        self.inner.reset(zlib_header);
+    }
+}
+
+impl Error for DecompressError {}
+
+impl DecompressError {
+    /// Retrieve the implementation's message about why the operation failed, if one exists.
+    pub fn message(&self) -> Option<&str> {
+        match &self.0 {
+            DecompressErrorInner::General { msg } => msg.get(),
+            _ => None,
+        }
+    }
+}
+
+impl From<DecompressError> for io::Error {
+    fn from(data: DecompressError) -> io::Error {
+        io::Error::new(io::ErrorKind::Other, data)
+    }
+}
+
+impl fmt::Display for DecompressError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let msg = match &self.0 {
+            DecompressErrorInner::General { msg } => msg.get(),
+            DecompressErrorInner::NeedsDictionary { .. } => Some("requires a dictionary"),
+        };
+        match msg {
+            Some(msg) => write!(f, "deflate decompression error: {}", msg),
+            None => write!(f, "deflate decompression error"),
+        }
+    }
+}
+
+impl Error for CompressError {}
+
+impl CompressError {
+    /// Retrieve the implementation's message about why the operation failed, if one exists.
+    pub fn message(&self) -> Option<&str> {
+        self.msg.get()
+    }
+}
+
+impl From<CompressError> for io::Error {
+    fn from(data: CompressError) -> io::Error {
+        io::Error::new(io::ErrorKind::Other, data)
+    }
+}
+
+impl fmt::Display for CompressError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self.msg.get() {
+            Some(msg) => write!(f, "deflate compression error: {}", msg),
+            None => write!(f, "deflate compression error"),
+        }
+    }
+}
+
+/// Allows `writer` to write data into the spare capacity of the `output` vector.
+/// This will not reallocate the vector provided or attempt to grow it, so space
+/// for the `output` must be reserved by the caller before calling this
+/// function.
+///
+/// `writer` needs to return the number of bytes written (and can also return
+/// another arbitrary return value).
+fn write_to_spare_capacity_of_vec<T>(
+    output: &mut Vec<u8>,
+    writer: impl FnOnce(&mut [u8]) -> (usize, T),
+) -> T {
+    let cap = output.capacity();
+    let len = output.len();
+
+    output.resize(output.capacity(), 0);
+    let (bytes_written, ret) = writer(&mut output[len..]);
+
+    let new_len = core::cmp::min(len + bytes_written, cap); // Sanitizes `bytes_written`.
+    output.resize(new_len, 0 /* unused */);
+
+    ret
+}
+
+#[cfg(test)]
+mod tests {
+    use std::io::Write;
+
+    use crate::write;
+    use crate::{Compression, Decompress, FlushDecompress};
+
+    #[cfg(feature = "any_zlib")]
+    use crate::{Compress, FlushCompress};
+
+    #[test]
+    fn issue51() {
+        let data = vec![
+            0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xb3, 0xc9, 0x28, 0xc9,
+            0xcd, 0xb1, 0xe3, 0xe5, 0xb2, 0xc9, 0x48, 0x4d, 0x4c, 0xb1, 0xb3, 0x29, 0xc9, 0x2c,
+            0xc9, 0x49, 0xb5, 0x33, 0x31, 0x30, 0x51, 0xf0, 0xcb, 0x2f, 0x51, 0x70, 0xcb, 0x2f,
+            0xcd, 0x4b, 0xb1, 0xd1, 0x87, 0x08, 0xda, 0xe8, 0x83, 0x95, 0x00, 0x95, 0x26, 0xe5,
+            0xa7, 0x54, 0x2a, 0x24, 0xa5, 0x27, 0xe7, 0xe7, 0xe4, 0x17, 0xd9, 0x2a, 0x95, 0x67,
+            0x64, 0x96, 0xa4, 0x2a, 0x81, 0x8c, 0x48, 0x4e, 0xcd, 0x2b, 0x49, 0x2d, 0xb2, 0xb3,
+            0xc9, 0x30, 0x44, 0x37, 0x01, 0x28, 0x62, 0xa3, 0x0f, 0x95, 0x06, 0xd9, 0x05, 0x54,
+            0x04, 0xe5, 0xe5, 0xa5, 0x67, 0xe6, 0x55, 0xe8, 0x1b, 0xea, 0x99, 0xe9, 0x19, 0x21,
+            0xab, 0xd0, 0x07, 0xd9, 0x01, 0x32, 0x53, 0x1f, 0xea, 0x3e, 0x00, 0x94, 0x85, 0xeb,
+            0xe4, 0xa8, 0x00, 0x00, 0x00,
+        ];
+
+        let mut decoded = Vec::with_capacity(data.len() * 2);
+
+        let mut d = Decompress::new(false);
+        // decompressed whole deflate stream
+        assert!(d
+            .decompress_vec(&data[10..], &mut decoded, FlushDecompress::Finish)
+            .is_ok());
+
+        // decompress data that has nothing to do with the deflate stream (this
+        // used to panic)
+        drop(d.decompress_vec(&[0], &mut decoded, FlushDecompress::None));
+    }
+
+    #[test]
+    fn reset() {
+        let string = "hello world".as_bytes();
+        let mut zlib = Vec::new();
+        let mut deflate = Vec::new();
+
+        let comp = Compression::default();
+        write::ZlibEncoder::new(&mut zlib, comp)
+            .write_all(string)
+            .unwrap();
+        write::DeflateEncoder::new(&mut deflate, comp)
+            .write_all(string)
+            .unwrap();
+
+        let mut dst = [0; 1024];
+        let mut decoder = Decompress::new(true);
+        decoder
+            .decompress(&zlib, &mut dst, FlushDecompress::Finish)
+            .unwrap();
+        assert_eq!(decoder.total_out(), string.len() as u64);
+        assert!(dst.starts_with(string));
+
+        decoder.reset(false);
+        decoder
+            .decompress(&deflate, &mut dst, FlushDecompress::Finish)
+            .unwrap();
+        assert_eq!(decoder.total_out(), string.len() as u64);
+        assert!(dst.starts_with(string));
+    }
+
+    #[cfg(feature = "any_zlib")]
+    #[test]
+    fn set_dictionary_with_zlib_header() {
+        let string = "hello, hello!".as_bytes();
+        let dictionary = "hello".as_bytes();
+
+        let mut encoded = Vec::with_capacity(1024);
+
+        let mut encoder = Compress::new(Compression::default(), true);
+
+        let dictionary_adler = encoder.set_dictionary(&dictionary).unwrap();
+
+        encoder
+            .compress_vec(string, &mut encoded, FlushCompress::Finish)
+            .unwrap();
+
+        assert_eq!(encoder.total_in(), string.len() as u64);
+        assert_eq!(encoder.total_out(), encoded.len() as u64);
+
+        let mut decoder = Decompress::new(true);
+        let mut decoded = [0; 1024];
+        let decompress_error = decoder
+            .decompress(&encoded, &mut decoded, FlushDecompress::Finish)
+            .expect_err("decompression should fail due to requiring a dictionary");
+
+        let required_adler = decompress_error.needs_dictionary()
+            .expect("the first call to decompress should indicate a dictionary is required along with the required Adler-32 checksum");
+
+        assert_eq!(required_adler, dictionary_adler,
+            "the Adler-32 checksum should match the value when the dictionary was set on the compressor");
+
+        let actual_adler = decoder.set_dictionary(&dictionary).unwrap();
+
+        assert_eq!(required_adler, actual_adler);
+
+        // Decompress the rest of the input to the remainder of the output buffer
+        let total_in = decoder.total_in();
+        let total_out = decoder.total_out();
+
+        let decompress_result = decoder.decompress(
+            &encoded[total_in as usize..],
+            &mut decoded[total_out as usize..],
+            FlushDecompress::Finish,
+        );
+        assert!(decompress_result.is_ok());
+
+        assert_eq!(&decoded[..decoder.total_out() as usize], string);
+    }
+
+    #[cfg(feature = "any_zlib")]
+    #[test]
+    fn set_dictionary_raw() {
+        let string = "hello, hello!".as_bytes();
+        let dictionary = "hello".as_bytes();
+
+        let mut encoded = Vec::with_capacity(1024);
+
+        let mut encoder = Compress::new(Compression::default(), false);
+
+        encoder.set_dictionary(&dictionary).unwrap();
+
+        encoder
+            .compress_vec(string, &mut encoded, FlushCompress::Finish)
+            .unwrap();
+
+        assert_eq!(encoder.total_in(), string.len() as u64);
+        assert_eq!(encoder.total_out(), encoded.len() as u64);
+
+        let mut decoder = Decompress::new(false);
+
+        decoder.set_dictionary(&dictionary).unwrap();
+
+        let mut decoded = [0; 1024];
+        let decompress_result = decoder.decompress(&encoded, &mut decoded, FlushDecompress::Finish);
+
+        assert!(decompress_result.is_ok());
+
+        assert_eq!(&decoded[..decoder.total_out() as usize], string);
+    }
+
+    #[cfg(feature = "any_zlib")]
+    #[test]
+    fn test_gzip_flate() {
+        let string = "hello, hello!".as_bytes();
+
+        let mut encoded = Vec::with_capacity(1024);
+
+        let mut encoder = Compress::new_gzip(Compression::default(), 9);
+
+        encoder
+            .compress_vec(string, &mut encoded, FlushCompress::Finish)
+            .unwrap();
+
+        assert_eq!(encoder.total_in(), string.len() as u64);
+        assert_eq!(encoder.total_out(), encoded.len() as u64);
+
+        let mut decoder = Decompress::new_gzip(9);
+
+        let mut decoded = [0; 1024];
+        decoder
+            .decompress(&encoded, &mut decoded, FlushDecompress::Finish)
+            .unwrap();
+
+        assert_eq!(&decoded[..decoder.total_out() as usize], string);
+    }
+
+    #[cfg(feature = "any_zlib")]
+    #[test]
+    fn test_error_message() {
+        let mut decoder = Decompress::new(false);
+        let mut decoded = [0; 128];
+        let garbage = b"xbvxzi";
+
+        let err = decoder
+            .decompress(&*garbage, &mut decoded, FlushDecompress::Finish)
+            .unwrap_err();
+
+        assert_eq!(err.message(), Some("invalid stored block lengths"));
+    }
+}