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-rw-r--r--vendor/flate2/src/bufreader.rs104
-rw-r--r--vendor/flate2/src/crc.rs184
-rw-r--r--vendor/flate2/src/deflate/bufread.rs245
-rw-r--r--vendor/flate2/src/deflate/mod.rs193
-rw-r--r--vendor/flate2/src/deflate/read.rs241
-rw-r--r--vendor/flate2/src/deflate/write.rs322
-rw-r--r--vendor/flate2/src/ffi/c.rs433
-rw-r--r--vendor/flate2/src/ffi/mod.rs52
-rw-r--r--vendor/flate2/src/ffi/rust.rs183
-rw-r--r--vendor/flate2/src/gz/bufread.rs483
-rw-r--r--vendor/flate2/src/gz/mod.rs644
-rw-r--r--vendor/flate2/src/gz/read.rs378
-rw-r--r--vendor/flate2/src/gz/write.rs641
-rw-r--r--vendor/flate2/src/lib.rs234
-rw-r--r--vendor/flate2/src/mem.rs772
-rw-r--r--vendor/flate2/src/zio.rs286
-rw-r--r--vendor/flate2/src/zlib/bufread.rs253
-rw-r--r--vendor/flate2/src/zlib/mod.rs159
-rw-r--r--vendor/flate2/src/zlib/read.rs275
-rw-r--r--vendor/flate2/src/zlib/write.rs340
20 files changed, 6422 insertions, 0 deletions
diff --git a/vendor/flate2/src/bufreader.rs b/vendor/flate2/src/bufreader.rs
new file mode 100644
index 0000000..7e6f89d
--- /dev/null
+++ b/vendor/flate2/src/bufreader.rs
@@ -0,0 +1,104 @@
+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// <https://github.com/rust-lang/rust/blob/HEAD/COPYRIGHT>.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::cmp;
+use std::io;
+use std::io::prelude::*;
+use std::mem;
+
+pub struct BufReader<R> {
+ inner: R,
+ buf: Box<[u8]>,
+ pos: usize,
+ cap: usize,
+}
+
+impl<R> ::std::fmt::Debug for BufReader<R>
+where
+ R: ::std::fmt::Debug,
+{
+ fn fmt(&self, fmt: &mut ::std::fmt::Formatter) -> Result<(), ::std::fmt::Error> {
+ fmt.debug_struct("BufReader")
+ .field("reader", &self.inner)
+ .field(
+ "buffer",
+ &format_args!("{}/{}", self.cap - self.pos, self.buf.len()),
+ )
+ .finish()
+ }
+}
+
+impl<R: Read> BufReader<R> {
+ pub fn new(inner: R) -> BufReader<R> {
+ BufReader::with_buf(vec![0; 32 * 1024], inner)
+ }
+
+ pub fn with_buf(buf: Vec<u8>, inner: R) -> BufReader<R> {
+ BufReader {
+ inner,
+ buf: buf.into_boxed_slice(),
+ pos: 0,
+ cap: 0,
+ }
+ }
+}
+
+impl<R> BufReader<R> {
+ pub fn get_ref(&self) -> &R {
+ &self.inner
+ }
+
+ pub fn get_mut(&mut self) -> &mut R {
+ &mut self.inner
+ }
+
+ pub fn into_inner(self) -> R {
+ self.inner
+ }
+
+ pub fn reset(&mut self, inner: R) -> R {
+ self.pos = 0;
+ self.cap = 0;
+ mem::replace(&mut self.inner, inner)
+ }
+}
+
+impl<R: Read> Read for BufReader<R> {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ // If we don't have any buffered data and we're doing a massive read
+ // (larger than our internal buffer), bypass our internal buffer
+ // entirely.
+ if self.pos == self.cap && buf.len() >= self.buf.len() {
+ return self.inner.read(buf);
+ }
+ let nread = {
+ let mut rem = self.fill_buf()?;
+ rem.read(buf)?
+ };
+ self.consume(nread);
+ Ok(nread)
+ }
+}
+
+impl<R: Read> BufRead for BufReader<R> {
+ fn fill_buf(&mut self) -> io::Result<&[u8]> {
+ // If we've reached the end of our internal buffer then we need to fetch
+ // some more data from the underlying reader.
+ if self.pos == self.cap {
+ self.cap = self.inner.read(&mut self.buf)?;
+ self.pos = 0;
+ }
+ Ok(&self.buf[self.pos..self.cap])
+ }
+
+ fn consume(&mut self, amt: usize) {
+ self.pos = cmp::min(self.pos + amt, self.cap);
+ }
+}
diff --git a/vendor/flate2/src/crc.rs b/vendor/flate2/src/crc.rs
new file mode 100644
index 0000000..16f5601
--- /dev/null
+++ b/vendor/flate2/src/crc.rs
@@ -0,0 +1,184 @@
+//! Simple CRC bindings backed by miniz.c
+
+use std::io;
+use std::io::prelude::*;
+
+use crc32fast::Hasher;
+
+/// The CRC calculated by a [`CrcReader`].
+///
+/// [`CrcReader`]: struct.CrcReader.html
+#[derive(Debug)]
+pub struct Crc {
+ amt: u32,
+ hasher: Hasher,
+}
+
+/// A wrapper around a [`Read`] that calculates the CRC.
+///
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+#[derive(Debug)]
+pub struct CrcReader<R> {
+ inner: R,
+ crc: Crc,
+}
+
+impl Default for Crc {
+ fn default() -> Self {
+ Self::new()
+ }
+}
+
+impl Crc {
+ /// Create a new CRC.
+ pub fn new() -> Crc {
+ Crc {
+ amt: 0,
+ hasher: Hasher::new(),
+ }
+ }
+
+ /// Returns the current crc32 checksum.
+ pub fn sum(&self) -> u32 {
+ self.hasher.clone().finalize()
+ }
+
+ /// The number of bytes that have been used to calculate the CRC.
+ /// This value is only accurate if the amount is lower than 2<sup>32</sup>.
+ pub fn amount(&self) -> u32 {
+ self.amt
+ }
+
+ /// Update the CRC with the bytes in `data`.
+ pub fn update(&mut self, data: &[u8]) {
+ self.amt = self.amt.wrapping_add(data.len() as u32);
+ self.hasher.update(data);
+ }
+
+ /// Reset the CRC.
+ pub fn reset(&mut self) {
+ self.amt = 0;
+ self.hasher.reset();
+ }
+
+ /// Combine the CRC with the CRC for the subsequent block of bytes.
+ pub fn combine(&mut self, additional_crc: &Crc) {
+ self.amt = self.amt.wrapping_add(additional_crc.amt);
+ self.hasher.combine(&additional_crc.hasher);
+ }
+}
+
+impl<R: Read> CrcReader<R> {
+ /// Create a new `CrcReader`.
+ pub fn new(r: R) -> CrcReader<R> {
+ CrcReader {
+ inner: r,
+ crc: Crc::new(),
+ }
+ }
+}
+
+impl<R> CrcReader<R> {
+ /// Get the Crc for this `CrcReader`.
+ pub fn crc(&self) -> &Crc {
+ &self.crc
+ }
+
+ /// Get the reader that is wrapped by this `CrcReader`.
+ pub fn into_inner(self) -> R {
+ self.inner
+ }
+
+ /// Get the reader that is wrapped by this `CrcReader` by reference.
+ pub fn get_ref(&self) -> &R {
+ &self.inner
+ }
+
+ /// Get a mutable reference to the reader that is wrapped by this `CrcReader`.
+ pub fn get_mut(&mut self) -> &mut R {
+ &mut self.inner
+ }
+
+ /// Reset the Crc in this `CrcReader`.
+ pub fn reset(&mut self) {
+ self.crc.reset();
+ }
+}
+
+impl<R: Read> Read for CrcReader<R> {
+ fn read(&mut self, into: &mut [u8]) -> io::Result<usize> {
+ let amt = self.inner.read(into)?;
+ self.crc.update(&into[..amt]);
+ Ok(amt)
+ }
+}
+
+impl<R: BufRead> BufRead for CrcReader<R> {
+ fn fill_buf(&mut self) -> io::Result<&[u8]> {
+ self.inner.fill_buf()
+ }
+ fn consume(&mut self, amt: usize) {
+ if let Ok(data) = self.inner.fill_buf() {
+ self.crc.update(&data[..amt]);
+ }
+ self.inner.consume(amt);
+ }
+}
+
+/// A wrapper around a [`Write`] that calculates the CRC.
+///
+/// [`Write`]: https://doc.rust-lang.org/std/io/trait.Write.html
+#[derive(Debug)]
+pub struct CrcWriter<W> {
+ inner: W,
+ crc: Crc,
+}
+
+impl<W> CrcWriter<W> {
+ /// Get the Crc for this `CrcWriter`.
+ pub fn crc(&self) -> &Crc {
+ &self.crc
+ }
+
+ /// Get the writer that is wrapped by this `CrcWriter`.
+ pub fn into_inner(self) -> W {
+ self.inner
+ }
+
+ /// Get the writer that is wrapped by this `CrcWriter` by reference.
+ pub fn get_ref(&self) -> &W {
+ &self.inner
+ }
+
+ /// Get a mutable reference to the writer that is wrapped by this `CrcWriter`.
+ pub fn get_mut(&mut self) -> &mut W {
+ &mut self.inner
+ }
+
+ /// Reset the Crc in this `CrcWriter`.
+ pub fn reset(&mut self) {
+ self.crc.reset();
+ }
+}
+
+impl<W: Write> CrcWriter<W> {
+ /// Create a new `CrcWriter`.
+ pub fn new(w: W) -> CrcWriter<W> {
+ CrcWriter {
+ inner: w,
+ crc: Crc::new(),
+ }
+ }
+}
+
+impl<W: Write> Write for CrcWriter<W> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ let amt = self.inner.write(buf)?;
+ self.crc.update(&buf[..amt]);
+ Ok(amt)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.inner.flush()
+ }
+}
diff --git a/vendor/flate2/src/deflate/bufread.rs b/vendor/flate2/src/deflate/bufread.rs
new file mode 100644
index 0000000..c70a630
--- /dev/null
+++ b/vendor/flate2/src/deflate/bufread.rs
@@ -0,0 +1,245 @@
+use std::io;
+use std::io::prelude::*;
+use std::mem;
+
+use crate::zio;
+use crate::{Compress, Decompress};
+
+/// A DEFLATE encoder, or compressor.
+///
+/// This structure implements a [`Read`] interface. When read from, it reads
+/// uncompressed data from the underlying [`BufRead`] and provides the compressed data.
+///
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+/// [`BufRead`]: https://doc.rust-lang.org/std/io/trait.BufRead.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// use flate2::Compression;
+/// use flate2::bufread::DeflateEncoder;
+/// use std::fs::File;
+/// use std::io::BufReader;
+///
+/// # fn main() {
+/// # println!("{:?}", open_hello_world().unwrap());
+/// # }
+/// #
+/// // Opens sample file, compresses the contents and returns a Vector
+/// fn open_hello_world() -> io::Result<Vec<u8>> {
+/// let f = File::open("examples/hello_world.txt")?;
+/// let b = BufReader::new(f);
+/// let mut deflater = DeflateEncoder::new(b, Compression::fast());
+/// let mut buffer = Vec::new();
+/// deflater.read_to_end(&mut buffer)?;
+/// Ok(buffer)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct DeflateEncoder<R> {
+ obj: R,
+ data: Compress,
+}
+
+impl<R: BufRead> DeflateEncoder<R> {
+ /// Creates a new encoder which will read uncompressed data from the given
+ /// stream and emit the compressed stream.
+ pub fn new(r: R, level: crate::Compression) -> DeflateEncoder<R> {
+ DeflateEncoder {
+ obj: r,
+ data: Compress::new(level, false),
+ }
+ }
+}
+
+pub fn reset_encoder_data<R>(zlib: &mut DeflateEncoder<R>) {
+ zlib.data.reset();
+}
+
+impl<R> DeflateEncoder<R> {
+ /// Resets the state of this encoder entirely, swapping out the input
+ /// stream for another.
+ ///
+ /// This function will reset the internal state of this encoder and replace
+ /// the input stream with the one provided, returning the previous input
+ /// stream. Future data read from this encoder will be the compressed
+ /// version of `r`'s data.
+ pub fn reset(&mut self, r: R) -> R {
+ reset_encoder_data(self);
+ mem::replace(&mut self.obj, r)
+ }
+
+ /// Acquires a reference to the underlying reader
+ pub fn get_ref(&self) -> &R {
+ &self.obj
+ }
+
+ /// Acquires a mutable reference to the underlying stream
+ ///
+ /// Note that mutation of the stream may result in surprising results if
+ /// this encoder is continued to be used.
+ pub fn get_mut(&mut self) -> &mut R {
+ &mut self.obj
+ }
+
+ /// Consumes this encoder, returning the underlying reader.
+ pub fn into_inner(self) -> R {
+ self.obj
+ }
+
+ /// Returns the number of bytes that have been read into this compressor.
+ ///
+ /// Note that not all bytes read from the underlying object may be accounted
+ /// for, there may still be some active buffering.
+ pub fn total_in(&self) -> u64 {
+ self.data.total_in()
+ }
+
+ /// Returns the number of bytes that the compressor has produced.
+ ///
+ /// Note that not all bytes may have been read yet, some may still be
+ /// buffered.
+ pub fn total_out(&self) -> u64 {
+ self.data.total_out()
+ }
+}
+
+impl<R: BufRead> Read for DeflateEncoder<R> {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ zio::read(&mut self.obj, &mut self.data, buf)
+ }
+}
+
+impl<W: BufRead + Write> Write for DeflateEncoder<W> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.get_mut().write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.get_mut().flush()
+ }
+}
+
+/// A DEFLATE decoder, or decompressor.
+///
+/// This structure implements a [`Read`] interface. When read from, it reads
+/// compressed data from the underlying [`BufRead`] and provides the uncompressed data.
+///
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+/// [`BufRead`]: https://doc.rust-lang.org/std/io/trait.BufRead.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// # use flate2::Compression;
+/// # use flate2::write::DeflateEncoder;
+/// use flate2::bufread::DeflateDecoder;
+///
+/// # fn main() {
+/// # let mut e = DeflateEncoder::new(Vec::new(), Compression::default());
+/// # e.write_all(b"Hello World").unwrap();
+/// # let bytes = e.finish().unwrap();
+/// # println!("{}", decode_reader(bytes).unwrap());
+/// # }
+/// // Uncompresses a Deflate Encoded vector of bytes and returns a string or error
+/// // Here &[u8] implements Read
+/// fn decode_reader(bytes: Vec<u8>) -> io::Result<String> {
+/// let mut deflater = DeflateDecoder::new(&bytes[..]);
+/// let mut s = String::new();
+/// deflater.read_to_string(&mut s)?;
+/// Ok(s)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct DeflateDecoder<R> {
+ obj: R,
+ data: Decompress,
+}
+
+pub fn reset_decoder_data<R>(zlib: &mut DeflateDecoder<R>) {
+ zlib.data = Decompress::new(false);
+}
+
+impl<R: BufRead> DeflateDecoder<R> {
+ /// Creates a new decoder which will decompress data read from the given
+ /// stream.
+ pub fn new(r: R) -> DeflateDecoder<R> {
+ DeflateDecoder {
+ obj: r,
+ data: Decompress::new(false),
+ }
+ }
+}
+
+impl<R> DeflateDecoder<R> {
+ /// Resets the state of this decoder entirely, swapping out the input
+ /// stream for another.
+ ///
+ /// This will reset the internal state of this decoder and replace the
+ /// input stream with the one provided, returning the previous input
+ /// stream. Future data read from this decoder will be the decompressed
+ /// version of `r`'s data.
+ pub fn reset(&mut self, r: R) -> R {
+ reset_decoder_data(self);
+ mem::replace(&mut self.obj, r)
+ }
+
+ /// Resets the state of this decoder's data
+ ///
+ /// This will reset the internal state of this decoder. It will continue
+ /// reading from the same stream.
+ pub fn reset_data(&mut self) {
+ reset_decoder_data(self);
+ }
+
+ /// Acquires a reference to the underlying stream
+ pub fn get_ref(&self) -> &R {
+ &self.obj
+ }
+
+ /// Acquires a mutable reference to the underlying stream
+ ///
+ /// Note that mutation of the stream may result in surprising results if
+ /// this decoder is continued to be used.
+ pub fn get_mut(&mut self) -> &mut R {
+ &mut self.obj
+ }
+
+ /// Consumes this decoder, returning the underlying reader.
+ pub fn into_inner(self) -> R {
+ self.obj
+ }
+
+ /// Returns the number of bytes that the decompressor has consumed.
+ ///
+ /// Note that this will likely be smaller than what the decompressor
+ /// actually read from the underlying stream due to buffering.
+ pub fn total_in(&self) -> u64 {
+ self.data.total_in()
+ }
+
+ /// Returns the number of bytes that the decompressor has produced.
+ pub fn total_out(&self) -> u64 {
+ self.data.total_out()
+ }
+}
+
+impl<R: BufRead> Read for DeflateDecoder<R> {
+ fn read(&mut self, into: &mut [u8]) -> io::Result<usize> {
+ zio::read(&mut self.obj, &mut self.data, into)
+ }
+}
+
+impl<W: BufRead + Write> Write for DeflateDecoder<W> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.get_mut().write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.get_mut().flush()
+ }
+}
diff --git a/vendor/flate2/src/deflate/mod.rs b/vendor/flate2/src/deflate/mod.rs
new file mode 100644
index 0000000..7f3bf70
--- /dev/null
+++ b/vendor/flate2/src/deflate/mod.rs
@@ -0,0 +1,193 @@
+pub mod bufread;
+pub mod read;
+pub mod write;
+
+#[cfg(test)]
+mod tests {
+ use std::io::prelude::*;
+
+ use rand::{thread_rng, Rng};
+
+ use super::{read, write};
+ use crate::Compression;
+
+ #[test]
+ fn roundtrip() {
+ let mut real = Vec::new();
+ let mut w = write::DeflateEncoder::new(Vec::new(), Compression::default());
+ let v = crate::random_bytes().take(1024).collect::<Vec<_>>();
+ for _ in 0..200 {
+ let to_write = &v[..thread_rng().gen_range(0..v.len())];
+ real.extend(to_write.iter().copied());
+ w.write_all(to_write).unwrap();
+ }
+ let result = w.finish().unwrap();
+ let mut r = read::DeflateDecoder::new(&result[..]);
+ let mut ret = Vec::new();
+ r.read_to_end(&mut ret).unwrap();
+ assert_eq!(ret, real);
+ }
+
+ #[test]
+ fn drop_writes() {
+ let mut data = Vec::new();
+ write::DeflateEncoder::new(&mut data, Compression::default())
+ .write_all(b"foo")
+ .unwrap();
+ let mut r = read::DeflateDecoder::new(&data[..]);
+ let mut ret = Vec::new();
+ r.read_to_end(&mut ret).unwrap();
+ assert_eq!(ret, b"foo");
+ }
+
+ #[test]
+ fn total_in() {
+ let mut real = Vec::new();
+ let mut w = write::DeflateEncoder::new(Vec::new(), Compression::default());
+ let v = crate::random_bytes().take(1024).collect::<Vec<_>>();
+ for _ in 0..200 {
+ let to_write = &v[..thread_rng().gen_range(0..v.len())];
+ real.extend(to_write.iter().copied());
+ w.write_all(to_write).unwrap();
+ }
+ let mut result = w.finish().unwrap();
+
+ let result_len = result.len();
+
+ for _ in 0..200 {
+ result.extend(v.iter().copied());
+ }
+
+ let mut r = read::DeflateDecoder::new(&result[..]);
+ let mut ret = Vec::new();
+ r.read_to_end(&mut ret).unwrap();
+ assert_eq!(ret, real);
+ assert_eq!(r.total_in(), result_len as u64);
+ }
+
+ #[test]
+ fn roundtrip2() {
+ let v = crate::random_bytes().take(1024 * 1024).collect::<Vec<_>>();
+ let mut r =
+ read::DeflateDecoder::new(read::DeflateEncoder::new(&v[..], Compression::default()));
+ let mut ret = Vec::new();
+ r.read_to_end(&mut ret).unwrap();
+ assert_eq!(ret, v);
+ }
+
+ #[test]
+ fn roundtrip3() {
+ let v = crate::random_bytes().take(1024 * 1024).collect::<Vec<_>>();
+ let mut w = write::DeflateEncoder::new(
+ write::DeflateDecoder::new(Vec::new()),
+ Compression::default(),
+ );
+ w.write_all(&v).unwrap();
+ let w = w.finish().unwrap().finish().unwrap();
+ assert_eq!(w, v);
+ }
+
+ #[test]
+ fn reset_writer() {
+ let v = crate::random_bytes().take(1024 * 1024).collect::<Vec<_>>();
+ let mut w = write::DeflateEncoder::new(Vec::new(), Compression::default());
+ w.write_all(&v).unwrap();
+ let a = w.reset(Vec::new()).unwrap();
+ w.write_all(&v).unwrap();
+ let b = w.finish().unwrap();
+
+ let mut w = write::DeflateEncoder::new(Vec::new(), Compression::default());
+ w.write_all(&v).unwrap();
+ let c = w.finish().unwrap();
+ assert!(a == b && b == c);
+ }
+
+ #[test]
+ fn reset_reader() {
+ let v = crate::random_bytes().take(1024 * 1024).collect::<Vec<_>>();
+ let (mut a, mut b, mut c) = (Vec::new(), Vec::new(), Vec::new());
+ let mut r = read::DeflateEncoder::new(&v[..], Compression::default());
+ r.read_to_end(&mut a).unwrap();
+ r.reset(&v[..]);
+ r.read_to_end(&mut b).unwrap();
+
+ let mut r = read::DeflateEncoder::new(&v[..], Compression::default());
+ r.read_to_end(&mut c).unwrap();
+ assert!(a == b && b == c);
+ }
+
+ #[test]
+ fn reset_decoder() {
+ let v = crate::random_bytes().take(1024 * 1024).collect::<Vec<_>>();
+ let mut w = write::DeflateEncoder::new(Vec::new(), Compression::default());
+ w.write_all(&v).unwrap();
+ let data = w.finish().unwrap();
+
+ {
+ let (mut a, mut b, mut c) = (Vec::new(), Vec::new(), Vec::new());
+ let mut r = read::DeflateDecoder::new(&data[..]);
+ r.read_to_end(&mut a).unwrap();
+ r.reset(&data);
+ r.read_to_end(&mut b).unwrap();
+
+ let mut r = read::DeflateDecoder::new(&data[..]);
+ r.read_to_end(&mut c).unwrap();
+ assert!(a == b && b == c && c == v);
+ }
+
+ {
+ let mut w = write::DeflateDecoder::new(Vec::new());
+ w.write_all(&data).unwrap();
+ let a = w.reset(Vec::new()).unwrap();
+ w.write_all(&data).unwrap();
+ let b = w.finish().unwrap();
+
+ let mut w = write::DeflateDecoder::new(Vec::new());
+ w.write_all(&data).unwrap();
+ let c = w.finish().unwrap();
+ assert!(a == b && b == c && c == v);
+ }
+ }
+
+ #[test]
+ fn zero_length_read_with_data() {
+ let m = vec![3u8; 128 * 1024 + 1];
+ let mut c = read::DeflateEncoder::new(&m[..], Compression::default());
+
+ let mut result = Vec::new();
+ c.read_to_end(&mut result).unwrap();
+
+ let mut d = read::DeflateDecoder::new(&result[..]);
+ let mut data = Vec::new();
+ assert_eq!(d.read(&mut data).unwrap(), 0);
+ }
+
+ #[test]
+ fn qc_reader() {
+ ::quickcheck::quickcheck(test as fn(_) -> _);
+
+ fn test(v: Vec<u8>) -> bool {
+ let mut r = read::DeflateDecoder::new(read::DeflateEncoder::new(
+ &v[..],
+ Compression::default(),
+ ));
+ let mut v2 = Vec::new();
+ r.read_to_end(&mut v2).unwrap();
+ v == v2
+ }
+ }
+
+ #[test]
+ fn qc_writer() {
+ ::quickcheck::quickcheck(test as fn(_) -> _);
+
+ fn test(v: Vec<u8>) -> bool {
+ let mut w = write::DeflateEncoder::new(
+ write::DeflateDecoder::new(Vec::new()),
+ Compression::default(),
+ );
+ w.write_all(&v).unwrap();
+ v == w.finish().unwrap().finish().unwrap()
+ }
+ }
+}
diff --git a/vendor/flate2/src/deflate/read.rs b/vendor/flate2/src/deflate/read.rs
new file mode 100644
index 0000000..2b6b8f2
--- /dev/null
+++ b/vendor/flate2/src/deflate/read.rs
@@ -0,0 +1,241 @@
+use std::io;
+use std::io::prelude::*;
+
+use super::bufread;
+use crate::bufreader::BufReader;
+
+/// A DEFLATE encoder, or compressor.
+///
+/// This structure implements a [`Read`] interface. When read from, it reads
+/// uncompressed data from the underlying [`Read`] and provides the compressed data.
+///
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// use flate2::Compression;
+/// use flate2::read::DeflateEncoder;
+///
+/// # fn main() {
+/// # println!("{:?}", deflateencoder_read_hello_world().unwrap());
+/// # }
+/// #
+/// // Return a vector containing the Deflate compressed version of hello world
+/// fn deflateencoder_read_hello_world() -> io::Result<Vec<u8>> {
+/// let mut ret_vec = Vec::new();
+/// let c = b"hello world";
+/// let mut deflater = DeflateEncoder::new(&c[..], Compression::fast());
+/// deflater.read_to_end(&mut ret_vec)?;
+/// Ok(ret_vec)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct DeflateEncoder<R> {
+ inner: bufread::DeflateEncoder<BufReader<R>>,
+}
+
+impl<R: Read> DeflateEncoder<R> {
+ /// Creates a new encoder which will read uncompressed data from the given
+ /// stream and emit the compressed stream.
+ pub fn new(r: R, level: crate::Compression) -> DeflateEncoder<R> {
+ DeflateEncoder {
+ inner: bufread::DeflateEncoder::new(BufReader::new(r), level),
+ }
+ }
+}
+
+impl<R> DeflateEncoder<R> {
+ /// Resets the state of this encoder entirely, swapping out the input
+ /// stream for another.
+ ///
+ /// This function will reset the internal state of this encoder and replace
+ /// the input stream with the one provided, returning the previous input
+ /// stream. Future data read from this encoder will be the compressed
+ /// version of `r`'s data.
+ ///
+ /// Note that there may be currently buffered data when this function is
+ /// called, and in that case the buffered data is discarded.
+ pub fn reset(&mut self, r: R) -> R {
+ super::bufread::reset_encoder_data(&mut self.inner);
+ self.inner.get_mut().reset(r)
+ }
+
+ /// Acquires a reference to the underlying reader
+ pub fn get_ref(&self) -> &R {
+ self.inner.get_ref().get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying stream
+ ///
+ /// Note that mutation of the stream may result in surprising results if
+ /// this encoder is continued to be used.
+ pub fn get_mut(&mut self) -> &mut R {
+ self.inner.get_mut().get_mut()
+ }
+
+ /// Consumes this encoder, returning the underlying reader.
+ ///
+ /// Note that there may be buffered bytes which are not re-acquired as part
+ /// of this transition. It's recommended to only call this function after
+ /// EOF has been reached.
+ pub fn into_inner(self) -> R {
+ self.inner.into_inner().into_inner()
+ }
+
+ /// Returns the number of bytes that have been read into this compressor.
+ ///
+ /// Note that not all bytes read from the underlying object may be accounted
+ /// for, there may still be some active buffering.
+ pub fn total_in(&self) -> u64 {
+ self.inner.total_in()
+ }
+
+ /// Returns the number of bytes that the compressor has produced.
+ ///
+ /// Note that not all bytes may have been read yet, some may still be
+ /// buffered.
+ pub fn total_out(&self) -> u64 {
+ self.inner.total_out()
+ }
+}
+
+impl<R: Read> Read for DeflateEncoder<R> {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.read(buf)
+ }
+}
+
+impl<W: Read + Write> Write for DeflateEncoder<W> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.get_mut().write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.get_mut().flush()
+ }
+}
+
+/// A DEFLATE decoder, or decompressor.
+///
+/// This structure implements a [`Read`] interface. When read from, it reads
+/// compressed data from the underlying [`Read`] and provides the uncompressed data.
+///
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// # use flate2::Compression;
+/// # use flate2::write::DeflateEncoder;
+/// use flate2::read::DeflateDecoder;
+///
+/// # fn main() {
+/// # let mut e = DeflateEncoder::new(Vec::new(), Compression::default());
+/// # e.write_all(b"Hello World").unwrap();
+/// # let bytes = e.finish().unwrap();
+/// # println!("{}", decode_reader(bytes).unwrap());
+/// # }
+/// // Uncompresses a Deflate Encoded vector of bytes and returns a string or error
+/// // Here &[u8] implements Read
+/// fn decode_reader(bytes: Vec<u8>) -> io::Result<String> {
+/// let mut deflater = DeflateDecoder::new(&bytes[..]);
+/// let mut s = String::new();
+/// deflater.read_to_string(&mut s)?;
+/// Ok(s)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct DeflateDecoder<R> {
+ inner: bufread::DeflateDecoder<BufReader<R>>,
+}
+
+impl<R: Read> DeflateDecoder<R> {
+ /// Creates a new decoder which will decompress data read from the given
+ /// stream.
+ pub fn new(r: R) -> DeflateDecoder<R> {
+ DeflateDecoder::new_with_buf(r, vec![0; 32 * 1024])
+ }
+
+ /// Same as `new`, but the intermediate buffer for data is specified.
+ ///
+ /// Note that the capacity of the intermediate buffer is never increased,
+ /// and it is recommended for it to be large.
+ pub fn new_with_buf(r: R, buf: Vec<u8>) -> DeflateDecoder<R> {
+ DeflateDecoder {
+ inner: bufread::DeflateDecoder::new(BufReader::with_buf(buf, r)),
+ }
+ }
+}
+
+impl<R> DeflateDecoder<R> {
+ /// Resets the state of this decoder entirely, swapping out the input
+ /// stream for another.
+ ///
+ /// This will reset the internal state of this decoder and replace the
+ /// input stream with the one provided, returning the previous input
+ /// stream. Future data read from this decoder will be the decompressed
+ /// version of `r`'s data.
+ ///
+ /// Note that there may be currently buffered data when this function is
+ /// called, and in that case the buffered data is discarded.
+ pub fn reset(&mut self, r: R) -> R {
+ super::bufread::reset_decoder_data(&mut self.inner);
+ self.inner.get_mut().reset(r)
+ }
+
+ /// Acquires a reference to the underlying stream
+ pub fn get_ref(&self) -> &R {
+ self.inner.get_ref().get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying stream
+ ///
+ /// Note that mutation of the stream may result in surprising results if
+ /// this decoder is continued to be used.
+ pub fn get_mut(&mut self) -> &mut R {
+ self.inner.get_mut().get_mut()
+ }
+
+ /// Consumes this decoder, returning the underlying reader.
+ ///
+ /// Note that there may be buffered bytes which are not re-acquired as part
+ /// of this transition. It's recommended to only call this function after
+ /// EOF has been reached.
+ pub fn into_inner(self) -> R {
+ self.inner.into_inner().into_inner()
+ }
+
+ /// Returns the number of bytes that the decompressor has consumed.
+ ///
+ /// Note that this will likely be smaller than what the decompressor
+ /// actually read from the underlying stream due to buffering.
+ pub fn total_in(&self) -> u64 {
+ self.inner.total_in()
+ }
+
+ /// Returns the number of bytes that the decompressor has produced.
+ pub fn total_out(&self) -> u64 {
+ self.inner.total_out()
+ }
+}
+
+impl<R: Read> Read for DeflateDecoder<R> {
+ fn read(&mut self, into: &mut [u8]) -> io::Result<usize> {
+ self.inner.read(into)
+ }
+}
+
+impl<W: Read + Write> Write for DeflateDecoder<W> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.get_mut().write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.get_mut().flush()
+ }
+}
diff --git a/vendor/flate2/src/deflate/write.rs b/vendor/flate2/src/deflate/write.rs
new file mode 100644
index 0000000..2c44556
--- /dev/null
+++ b/vendor/flate2/src/deflate/write.rs
@@ -0,0 +1,322 @@
+use std::io;
+use std::io::prelude::*;
+
+use crate::zio;
+use crate::{Compress, Decompress};
+
+/// A DEFLATE encoder, or compressor.
+///
+/// This structure implements a [`Write`] interface and takes a stream of
+/// uncompressed data, writing the compressed data to the wrapped writer.
+///
+/// [`Write`]: https://doc.rust-lang.org/std/io/trait.Write.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use flate2::Compression;
+/// use flate2::write::DeflateEncoder;
+///
+/// // Vec<u8> implements Write to print the compressed bytes of sample string
+/// # fn main() {
+///
+/// let mut e = DeflateEncoder::new(Vec::new(), Compression::default());
+/// e.write_all(b"Hello World").unwrap();
+/// println!("{:?}", e.finish().unwrap());
+/// # }
+/// ```
+#[derive(Debug)]
+pub struct DeflateEncoder<W: Write> {
+ inner: zio::Writer<W, Compress>,
+}
+
+impl<W: Write> DeflateEncoder<W> {
+ /// Creates a new encoder which will write compressed data to the stream
+ /// given at the given compression level.
+ ///
+ /// When this encoder is dropped or unwrapped the final pieces of data will
+ /// be flushed.
+ pub fn new(w: W, level: crate::Compression) -> DeflateEncoder<W> {
+ DeflateEncoder {
+ inner: zio::Writer::new(w, Compress::new(level, false)),
+ }
+ }
+
+ /// Acquires a reference to the underlying writer.
+ pub fn get_ref(&self) -> &W {
+ self.inner.get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying writer.
+ ///
+ /// Note that mutating the output/input state of the stream may corrupt this
+ /// object, so care must be taken when using this method.
+ pub fn get_mut(&mut self) -> &mut W {
+ self.inner.get_mut()
+ }
+
+ /// Resets the state of this encoder entirely, swapping out the output
+ /// stream for another.
+ ///
+ /// This function will finish encoding the current stream into the current
+ /// output stream before swapping out the two output streams. If the stream
+ /// cannot be finished an error is returned.
+ ///
+ /// After the current stream has been finished, this will reset the internal
+ /// state of this encoder and replace the output stream with the one
+ /// provided, returning the previous output stream. Future data written to
+ /// this encoder will be the compressed into the stream `w` provided.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn reset(&mut self, w: W) -> io::Result<W> {
+ self.inner.finish()?;
+ self.inner.data.reset();
+ Ok(self.inner.replace(w))
+ }
+
+ /// Attempt to finish this output stream, writing out final chunks of data.
+ ///
+ /// Note that this function can only be used once data has finished being
+ /// written to the output stream. After this function is called then further
+ /// calls to `write` may result in a panic.
+ ///
+ /// # Panics
+ ///
+ /// Attempts to write data to this stream may result in a panic after this
+ /// function is called.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn try_finish(&mut self) -> io::Result<()> {
+ self.inner.finish()
+ }
+
+ /// Consumes this encoder, flushing the output stream.
+ ///
+ /// This will flush the underlying data stream, close off the compressed
+ /// stream and, if successful, return the contained writer.
+ ///
+ /// Note that this function may not be suitable to call in a situation where
+ /// the underlying stream is an asynchronous I/O stream. To finish a stream
+ /// the `try_finish` (or `shutdown`) method should be used instead. To
+ /// re-acquire ownership of a stream it is safe to call this method after
+ /// `try_finish` or `shutdown` has returned `Ok`.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn finish(mut self) -> io::Result<W> {
+ self.inner.finish()?;
+ Ok(self.inner.take_inner())
+ }
+
+ /// Consumes this encoder, flushing the output stream.
+ ///
+ /// This will flush the underlying data stream and then return the contained
+ /// writer if the flush succeeded.
+ /// The compressed stream will not closed but only flushed. This
+ /// means that obtained byte array can by extended by another deflated
+ /// stream. To close the stream add the two bytes 0x3 and 0x0.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn flush_finish(mut self) -> io::Result<W> {
+ self.inner.flush()?;
+ Ok(self.inner.take_inner())
+ }
+
+ /// Returns the number of bytes that have been written to this compressor.
+ ///
+ /// Note that not all bytes written to this object may be accounted for,
+ /// there may still be some active buffering.
+ pub fn total_in(&self) -> u64 {
+ self.inner.data.total_in()
+ }
+
+ /// Returns the number of bytes that the compressor has produced.
+ ///
+ /// Note that not all bytes may have been written yet, some may still be
+ /// buffered.
+ pub fn total_out(&self) -> u64 {
+ self.inner.data.total_out()
+ }
+}
+
+impl<W: Write> Write for DeflateEncoder<W> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.inner.write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.inner.flush()
+ }
+}
+
+impl<W: Read + Write> Read for DeflateEncoder<W> {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.get_mut().read(buf)
+ }
+}
+
+/// A DEFLATE decoder, or decompressor.
+///
+/// This structure implements a [`Write`] and will emit a stream of decompressed
+/// data when fed a stream of compressed data.
+///
+/// [`Write`]: https://doc.rust-lang.org/std/io/trait.Read.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// # use flate2::Compression;
+/// # use flate2::write::DeflateEncoder;
+/// use flate2::write::DeflateDecoder;
+///
+/// # fn main() {
+/// # let mut e = DeflateEncoder::new(Vec::new(), Compression::default());
+/// # e.write_all(b"Hello World").unwrap();
+/// # let bytes = e.finish().unwrap();
+/// # println!("{}", decode_writer(bytes).unwrap());
+/// # }
+/// // Uncompresses a Deflate Encoded vector of bytes and returns a string or error
+/// // Here Vec<u8> implements Write
+/// fn decode_writer(bytes: Vec<u8>) -> io::Result<String> {
+/// let mut writer = Vec::new();
+/// let mut deflater = DeflateDecoder::new(writer);
+/// deflater.write_all(&bytes[..])?;
+/// writer = deflater.finish()?;
+/// let return_string = String::from_utf8(writer).expect("String parsing error");
+/// Ok(return_string)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct DeflateDecoder<W: Write> {
+ inner: zio::Writer<W, Decompress>,
+}
+
+impl<W: Write> DeflateDecoder<W> {
+ /// Creates a new decoder which will write uncompressed data to the stream.
+ ///
+ /// When this encoder is dropped or unwrapped the final pieces of data will
+ /// be flushed.
+ pub fn new(w: W) -> DeflateDecoder<W> {
+ DeflateDecoder {
+ inner: zio::Writer::new(w, Decompress::new(false)),
+ }
+ }
+
+ /// Acquires a reference to the underlying writer.
+ pub fn get_ref(&self) -> &W {
+ self.inner.get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying writer.
+ ///
+ /// Note that mutating the output/input state of the stream may corrupt this
+ /// object, so care must be taken when using this method.
+ pub fn get_mut(&mut self) -> &mut W {
+ self.inner.get_mut()
+ }
+
+ /// Resets the state of this decoder entirely, swapping out the output
+ /// stream for another.
+ ///
+ /// This function will finish encoding the current stream into the current
+ /// output stream before swapping out the two output streams.
+ ///
+ /// This will then reset the internal state of this decoder and replace the
+ /// output stream with the one provided, returning the previous output
+ /// stream. Future data written to this decoder will be decompressed into
+ /// the output stream `w`.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to finish the stream, and if that I/O
+ /// returns an error then that will be returned from this function.
+ pub fn reset(&mut self, w: W) -> io::Result<W> {
+ self.inner.finish()?;
+ self.inner.data = Decompress::new(false);
+ Ok(self.inner.replace(w))
+ }
+
+ /// Attempt to finish this output stream, writing out final chunks of data.
+ ///
+ /// Note that this function can only be used once data has finished being
+ /// written to the output stream. After this function is called then further
+ /// calls to `write` may result in a panic.
+ ///
+ /// # Panics
+ ///
+ /// Attempts to write data to this stream may result in a panic after this
+ /// function is called.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to finish the stream, returning any
+ /// errors which happen.
+ pub fn try_finish(&mut self) -> io::Result<()> {
+ self.inner.finish()
+ }
+
+ /// Consumes this encoder, flushing the output stream.
+ ///
+ /// This will flush the underlying data stream and then return the contained
+ /// writer if the flush succeeded.
+ ///
+ /// Note that this function may not be suitable to call in a situation where
+ /// the underlying stream is an asynchronous I/O stream. To finish a stream
+ /// the `try_finish` (or `shutdown`) method should be used instead. To
+ /// re-acquire ownership of a stream it is safe to call this method after
+ /// `try_finish` or `shutdown` has returned `Ok`.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn finish(mut self) -> io::Result<W> {
+ self.inner.finish()?;
+ Ok(self.inner.take_inner())
+ }
+
+ /// Returns the number of bytes that the decompressor has consumed for
+ /// decompression.
+ ///
+ /// Note that this will likely be smaller than the number of bytes
+ /// successfully written to this stream due to internal buffering.
+ pub fn total_in(&self) -> u64 {
+ self.inner.data.total_in()
+ }
+
+ /// Returns the number of bytes that the decompressor has written to its
+ /// output stream.
+ pub fn total_out(&self) -> u64 {
+ self.inner.data.total_out()
+ }
+}
+
+impl<W: Write> Write for DeflateDecoder<W> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.inner.write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.inner.flush()
+ }
+}
+
+impl<W: Read + Write> Read for DeflateDecoder<W> {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.get_mut().read(buf)
+ }
+}
diff --git a/vendor/flate2/src/ffi/c.rs b/vendor/flate2/src/ffi/c.rs
new file mode 100644
index 0000000..32864f8
--- /dev/null
+++ b/vendor/flate2/src/ffi/c.rs
@@ -0,0 +1,433 @@
+//! Implementation for C backends.
+use std::alloc::{self, Layout};
+use std::cmp;
+use std::convert::TryFrom;
+use std::fmt;
+use std::marker;
+use std::ops::{Deref, DerefMut};
+use std::os::raw::{c_int, c_uint, c_void};
+use std::ptr;
+
+use super::*;
+use crate::mem::{self, FlushDecompress, Status};
+
+#[derive(Default)]
+pub struct ErrorMessage(Option<&'static str>);
+
+impl ErrorMessage {
+ pub fn get(&self) -> Option<&str> {
+ self.0
+ }
+}
+
+pub struct StreamWrapper {
+ pub inner: Box<mz_stream>,
+}
+
+impl fmt::Debug for StreamWrapper {
+ fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+ write!(f, "StreamWrapper")
+ }
+}
+
+impl Default for StreamWrapper {
+ fn default() -> StreamWrapper {
+ StreamWrapper {
+ inner: Box::new(mz_stream {
+ next_in: ptr::null_mut(),
+ avail_in: 0,
+ total_in: 0,
+ next_out: ptr::null_mut(),
+ avail_out: 0,
+ total_out: 0,
+ msg: ptr::null_mut(),
+ adler: 0,
+ data_type: 0,
+ reserved: 0,
+ opaque: ptr::null_mut(),
+ state: ptr::null_mut(),
+ #[cfg(all(feature = "any_zlib", not(feature = "cloudflare-zlib-sys")))]
+ zalloc,
+ #[cfg(all(feature = "any_zlib", not(feature = "cloudflare-zlib-sys")))]
+ zfree,
+ #[cfg(not(all(feature = "any_zlib", not(feature = "cloudflare-zlib-sys"))))]
+ zalloc: Some(zalloc),
+ #[cfg(not(all(feature = "any_zlib", not(feature = "cloudflare-zlib-sys"))))]
+ zfree: Some(zfree),
+ }),
+ }
+ }
+}
+
+const ALIGN: usize = std::mem::align_of::<usize>();
+
+fn align_up(size: usize, align: usize) -> usize {
+ (size + align - 1) & !(align - 1)
+}
+
+extern "C" fn zalloc(_ptr: *mut c_void, items: AllocSize, item_size: AllocSize) -> *mut c_void {
+ // We need to multiply `items` and `item_size` to get the actual desired
+ // allocation size. Since `zfree` doesn't receive a size argument we
+ // also need to allocate space for a `usize` as a header so we can store
+ // how large the allocation is to deallocate later.
+ let size = match items
+ .checked_mul(item_size)
+ .and_then(|i| usize::try_from(i).ok())
+ .map(|size| align_up(size, ALIGN))
+ .and_then(|i| i.checked_add(std::mem::size_of::<usize>()))
+ {
+ Some(i) => i,
+ None => return ptr::null_mut(),
+ };
+
+ // Make sure the `size` isn't too big to fail `Layout`'s restrictions
+ let layout = match Layout::from_size_align(size, ALIGN) {
+ Ok(layout) => layout,
+ Err(_) => return ptr::null_mut(),
+ };
+
+ unsafe {
+ // Allocate the data, and if successful store the size we allocated
+ // at the beginning and then return an offset pointer.
+ let ptr = alloc::alloc(layout) as *mut usize;
+ if ptr.is_null() {
+ return ptr as *mut c_void;
+ }
+ *ptr = size;
+ ptr.add(1) as *mut c_void
+ }
+}
+
+extern "C" fn zfree(_ptr: *mut c_void, address: *mut c_void) {
+ unsafe {
+ // Move our address being freed back one pointer, read the size we
+ // stored in `zalloc`, and then free it using the standard Rust
+ // allocator.
+ let ptr = (address as *mut usize).offset(-1);
+ let size = *ptr;
+ let layout = Layout::from_size_align_unchecked(size, ALIGN);
+ alloc::dealloc(ptr as *mut u8, layout)
+ }
+}
+
+impl Deref for StreamWrapper {
+ type Target = mz_stream;
+
+ fn deref(&self) -> &Self::Target {
+ &*self.inner
+ }
+}
+
+impl DerefMut for StreamWrapper {
+ fn deref_mut(&mut self) -> &mut Self::Target {
+ &mut *self.inner
+ }
+}
+
+unsafe impl<D: Direction> Send for Stream<D> {}
+unsafe impl<D: Direction> Sync for Stream<D> {}
+
+/// Trait used to call the right destroy/end function on the inner
+/// stream object on drop.
+pub trait Direction {
+ unsafe fn destroy(stream: *mut mz_stream) -> c_int;
+}
+
+#[derive(Debug)]
+pub enum DirCompress {}
+#[derive(Debug)]
+pub enum DirDecompress {}
+
+#[derive(Debug)]
+pub struct Stream<D: Direction> {
+ pub stream_wrapper: StreamWrapper,
+ pub total_in: u64,
+ pub total_out: u64,
+ pub _marker: marker::PhantomData<D>,
+}
+
+impl<D: Direction> Stream<D> {
+ pub fn msg(&self) -> ErrorMessage {
+ let msg = self.stream_wrapper.msg;
+ ErrorMessage(if msg.is_null() {
+ None
+ } else {
+ let s = unsafe { std::ffi::CStr::from_ptr(msg) };
+ std::str::from_utf8(s.to_bytes()).ok()
+ })
+ }
+}
+
+impl<D: Direction> Drop for Stream<D> {
+ fn drop(&mut self) {
+ unsafe {
+ let _ = D::destroy(&mut *self.stream_wrapper);
+ }
+ }
+}
+
+impl Direction for DirCompress {
+ unsafe fn destroy(stream: *mut mz_stream) -> c_int {
+ mz_deflateEnd(stream)
+ }
+}
+impl Direction for DirDecompress {
+ unsafe fn destroy(stream: *mut mz_stream) -> c_int {
+ mz_inflateEnd(stream)
+ }
+}
+
+#[derive(Debug)]
+pub struct Inflate {
+ pub inner: Stream<DirDecompress>,
+}
+
+impl InflateBackend for Inflate {
+ fn make(zlib_header: bool, window_bits: u8) -> Self {
+ unsafe {
+ let mut state = StreamWrapper::default();
+ let ret = mz_inflateInit2(
+ &mut *state,
+ if zlib_header {
+ window_bits as c_int
+ } else {
+ -(window_bits as c_int)
+ },
+ );
+ assert_eq!(ret, 0);
+ Inflate {
+ inner: Stream {
+ stream_wrapper: state,
+ total_in: 0,
+ total_out: 0,
+ _marker: marker::PhantomData,
+ },
+ }
+ }
+ }
+
+ fn decompress(
+ &mut self,
+ input: &[u8],
+ output: &mut [u8],
+ flush: FlushDecompress,
+ ) -> Result<Status, DecompressError> {
+ let raw = &mut *self.inner.stream_wrapper;
+ raw.msg = ptr::null_mut();
+ raw.next_in = input.as_ptr() as *mut u8;
+ raw.avail_in = cmp::min(input.len(), c_uint::MAX as usize) as c_uint;
+ raw.next_out = output.as_mut_ptr();
+ raw.avail_out = cmp::min(output.len(), c_uint::MAX as usize) as c_uint;
+
+ let rc = unsafe { mz_inflate(raw, flush as c_int) };
+
+ // Unfortunately the total counters provided by zlib might be only
+ // 32 bits wide and overflow while processing large amounts of data.
+ self.inner.total_in += (raw.next_in as usize - input.as_ptr() as usize) as u64;
+ self.inner.total_out += (raw.next_out as usize - output.as_ptr() as usize) as u64;
+
+ // reset these pointers so we don't accidentally read them later
+ raw.next_in = ptr::null_mut();
+ raw.avail_in = 0;
+ raw.next_out = ptr::null_mut();
+ raw.avail_out = 0;
+
+ match rc {
+ MZ_DATA_ERROR | MZ_STREAM_ERROR => mem::decompress_failed(self.inner.msg()),
+ MZ_OK => Ok(Status::Ok),
+ MZ_BUF_ERROR => Ok(Status::BufError),
+ MZ_STREAM_END => Ok(Status::StreamEnd),
+ MZ_NEED_DICT => mem::decompress_need_dict(raw.adler as u32),
+ c => panic!("unknown return code: {}", c),
+ }
+ }
+
+ fn reset(&mut self, zlib_header: bool) {
+ let bits = if zlib_header {
+ MZ_DEFAULT_WINDOW_BITS
+ } else {
+ -MZ_DEFAULT_WINDOW_BITS
+ };
+ unsafe {
+ inflateReset2(&mut *self.inner.stream_wrapper, bits);
+ }
+ self.inner.total_out = 0;
+ self.inner.total_in = 0;
+ }
+}
+
+impl Backend for Inflate {
+ #[inline]
+ fn total_in(&self) -> u64 {
+ self.inner.total_in
+ }
+
+ #[inline]
+ fn total_out(&self) -> u64 {
+ self.inner.total_out
+ }
+}
+
+#[derive(Debug)]
+pub struct Deflate {
+ pub inner: Stream<DirCompress>,
+}
+
+impl DeflateBackend for Deflate {
+ fn make(level: Compression, zlib_header: bool, window_bits: u8) -> Self {
+ unsafe {
+ let mut state = StreamWrapper::default();
+ let ret = mz_deflateInit2(
+ &mut *state,
+ level.0 as c_int,
+ MZ_DEFLATED,
+ if zlib_header {
+ window_bits as c_int
+ } else {
+ -(window_bits as c_int)
+ },
+ 8,
+ MZ_DEFAULT_STRATEGY,
+ );
+ assert_eq!(ret, 0);
+ Deflate {
+ inner: Stream {
+ stream_wrapper: state,
+ total_in: 0,
+ total_out: 0,
+ _marker: marker::PhantomData,
+ },
+ }
+ }
+ }
+ fn compress(
+ &mut self,
+ input: &[u8],
+ output: &mut [u8],
+ flush: FlushCompress,
+ ) -> Result<Status, CompressError> {
+ let raw = &mut *self.inner.stream_wrapper;
+ raw.msg = ptr::null_mut();
+ raw.next_in = input.as_ptr() as *mut _;
+ raw.avail_in = cmp::min(input.len(), c_uint::MAX as usize) as c_uint;
+ raw.next_out = output.as_mut_ptr();
+ raw.avail_out = cmp::min(output.len(), c_uint::MAX as usize) as c_uint;
+
+ let rc = unsafe { mz_deflate(raw, flush as c_int) };
+
+ // Unfortunately the total counters provided by zlib might be only
+ // 32 bits wide and overflow while processing large amounts of data.
+ self.inner.total_in += (raw.next_in as usize - input.as_ptr() as usize) as u64;
+ self.inner.total_out += (raw.next_out as usize - output.as_ptr() as usize) as u64;
+
+ // reset these pointers so we don't accidentally read them later
+ raw.next_in = ptr::null_mut();
+ raw.avail_in = 0;
+ raw.next_out = ptr::null_mut();
+ raw.avail_out = 0;
+
+ match rc {
+ MZ_OK => Ok(Status::Ok),
+ MZ_BUF_ERROR => Ok(Status::BufError),
+ MZ_STREAM_END => Ok(Status::StreamEnd),
+ MZ_STREAM_ERROR => mem::compress_failed(self.inner.msg()),
+ c => panic!("unknown return code: {}", c),
+ }
+ }
+
+ fn reset(&mut self) {
+ self.inner.total_in = 0;
+ self.inner.total_out = 0;
+ let rc = unsafe { mz_deflateReset(&mut *self.inner.stream_wrapper) };
+ assert_eq!(rc, MZ_OK);
+ }
+}
+
+impl Backend for Deflate {
+ #[inline]
+ fn total_in(&self) -> u64 {
+ self.inner.total_in
+ }
+
+ #[inline]
+ fn total_out(&self) -> u64 {
+ self.inner.total_out
+ }
+}
+
+pub use self::c_backend::*;
+
+/// For backwards compatibility, we provide symbols as `mz_` to mimic the miniz API
+#[allow(bad_style)]
+mod c_backend {
+ use std::mem;
+ use std::os::raw::{c_char, c_int};
+
+ #[cfg(feature = "zlib-ng")]
+ use libz_ng_sys as libz;
+
+ #[cfg(all(not(feature = "zlib-ng"), feature = "cloudflare_zlib"))]
+ use cloudflare_zlib_sys as libz;
+
+ #[cfg(all(not(feature = "cloudflare_zlib"), not(feature = "zlib-ng")))]
+ use libz_sys as libz;
+
+ pub use libz::deflate as mz_deflate;
+ pub use libz::deflateEnd as mz_deflateEnd;
+ pub use libz::deflateReset as mz_deflateReset;
+ pub use libz::inflate as mz_inflate;
+ pub use libz::inflateEnd as mz_inflateEnd;
+ pub use libz::z_stream as mz_stream;
+ pub use libz::*;
+
+ pub use libz::Z_BLOCK as MZ_BLOCK;
+ pub use libz::Z_BUF_ERROR as MZ_BUF_ERROR;
+ pub use libz::Z_DATA_ERROR as MZ_DATA_ERROR;
+ pub use libz::Z_DEFAULT_STRATEGY as MZ_DEFAULT_STRATEGY;
+ pub use libz::Z_DEFLATED as MZ_DEFLATED;
+ pub use libz::Z_FINISH as MZ_FINISH;
+ pub use libz::Z_FULL_FLUSH as MZ_FULL_FLUSH;
+ pub use libz::Z_NEED_DICT as MZ_NEED_DICT;
+ pub use libz::Z_NO_FLUSH as MZ_NO_FLUSH;
+ pub use libz::Z_OK as MZ_OK;
+ pub use libz::Z_PARTIAL_FLUSH as MZ_PARTIAL_FLUSH;
+ pub use libz::Z_STREAM_END as MZ_STREAM_END;
+ pub use libz::Z_STREAM_ERROR as MZ_STREAM_ERROR;
+ pub use libz::Z_SYNC_FLUSH as MZ_SYNC_FLUSH;
+ pub type AllocSize = libz::uInt;
+
+ pub const MZ_DEFAULT_WINDOW_BITS: c_int = 15;
+
+ #[cfg(feature = "zlib-ng")]
+ const ZLIB_VERSION: &'static str = "2.1.0.devel\0";
+ #[cfg(not(feature = "zlib-ng"))]
+ const ZLIB_VERSION: &'static str = "1.2.8\0";
+
+ pub unsafe extern "C" fn mz_deflateInit2(
+ stream: *mut mz_stream,
+ level: c_int,
+ method: c_int,
+ window_bits: c_int,
+ mem_level: c_int,
+ strategy: c_int,
+ ) -> c_int {
+ libz::deflateInit2_(
+ stream,
+ level,
+ method,
+ window_bits,
+ mem_level,
+ strategy,
+ ZLIB_VERSION.as_ptr() as *const c_char,
+ mem::size_of::<mz_stream>() as c_int,
+ )
+ }
+ pub unsafe extern "C" fn mz_inflateInit2(stream: *mut mz_stream, window_bits: c_int) -> c_int {
+ libz::inflateInit2_(
+ stream,
+ window_bits,
+ ZLIB_VERSION.as_ptr() as *const c_char,
+ mem::size_of::<mz_stream>() as c_int,
+ )
+ }
+}
diff --git a/vendor/flate2/src/ffi/mod.rs b/vendor/flate2/src/ffi/mod.rs
new file mode 100644
index 0000000..20b3cae
--- /dev/null
+++ b/vendor/flate2/src/ffi/mod.rs
@@ -0,0 +1,52 @@
+//! This module contains backend-specific code.
+
+use crate::mem::{CompressError, DecompressError, FlushCompress, FlushDecompress, Status};
+use crate::Compression;
+
+/// Traits specifying the interface of the backends.
+///
+/// Sync + Send are added as a condition to ensure they are available
+/// for the frontend.
+pub trait Backend: Sync + Send {
+ fn total_in(&self) -> u64;
+ fn total_out(&self) -> u64;
+}
+
+pub trait InflateBackend: Backend {
+ fn make(zlib_header: bool, window_bits: u8) -> Self;
+ fn decompress(
+ &mut self,
+ input: &[u8],
+ output: &mut [u8],
+ flush: FlushDecompress,
+ ) -> Result<Status, DecompressError>;
+ fn reset(&mut self, zlib_header: bool);
+}
+
+pub trait DeflateBackend: Backend {
+ fn make(level: Compression, zlib_header: bool, window_bits: u8) -> Self;
+ fn compress(
+ &mut self,
+ input: &[u8],
+ output: &mut [u8],
+ flush: FlushCompress,
+ ) -> Result<Status, CompressError>;
+ fn reset(&mut self);
+}
+
+// Default to Rust implementation unless explicitly opted in to a different backend.
+#[cfg(feature = "any_zlib")]
+mod c;
+#[cfg(feature = "any_zlib")]
+pub use self::c::*;
+
+#[cfg(all(not(feature = "any_zlib"), feature = "miniz_oxide"))]
+mod rust;
+#[cfg(all(not(feature = "any_zlib"), feature = "miniz_oxide"))]
+pub use self::rust::*;
+
+impl std::fmt::Debug for ErrorMessage {
+ fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+ self.get().fmt(f)
+ }
+}
diff --git a/vendor/flate2/src/ffi/rust.rs b/vendor/flate2/src/ffi/rust.rs
new file mode 100644
index 0000000..bed6629
--- /dev/null
+++ b/vendor/flate2/src/ffi/rust.rs
@@ -0,0 +1,183 @@
+//! Implementation for `miniz_oxide` rust backend.
+
+use std::convert::TryInto;
+use std::fmt;
+
+use miniz_oxide::deflate::core::CompressorOxide;
+use miniz_oxide::inflate::stream::InflateState;
+pub use miniz_oxide::*;
+
+pub const MZ_NO_FLUSH: isize = MZFlush::None as isize;
+pub const MZ_PARTIAL_FLUSH: isize = MZFlush::Partial as isize;
+pub const MZ_SYNC_FLUSH: isize = MZFlush::Sync as isize;
+pub const MZ_FULL_FLUSH: isize = MZFlush::Full as isize;
+pub const MZ_FINISH: isize = MZFlush::Finish as isize;
+
+use super::*;
+use crate::mem;
+
+// miniz_oxide doesn't provide any error messages (yet?)
+#[derive(Default)]
+pub struct ErrorMessage;
+
+impl ErrorMessage {
+ pub fn get(&self) -> Option<&str> {
+ None
+ }
+}
+
+fn format_from_bool(zlib_header: bool) -> DataFormat {
+ if zlib_header {
+ DataFormat::Zlib
+ } else {
+ DataFormat::Raw
+ }
+}
+
+pub struct Inflate {
+ inner: Box<InflateState>,
+ total_in: u64,
+ total_out: u64,
+}
+
+impl fmt::Debug for Inflate {
+ fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+ write!(
+ f,
+ "miniz_oxide inflate internal state. total_in: {}, total_out: {}",
+ self.total_in, self.total_out,
+ )
+ }
+}
+
+impl InflateBackend for Inflate {
+ fn make(zlib_header: bool, _window_bits: u8) -> Self {
+ let format = format_from_bool(zlib_header);
+
+ Inflate {
+ inner: InflateState::new_boxed(format),
+ total_in: 0,
+ total_out: 0,
+ }
+ }
+
+ fn decompress(
+ &mut self,
+ input: &[u8],
+ output: &mut [u8],
+ flush: FlushDecompress,
+ ) -> Result<Status, DecompressError> {
+ let flush = MZFlush::new(flush as i32).unwrap();
+
+ let res = inflate::stream::inflate(&mut self.inner, input, output, flush);
+ self.total_in += res.bytes_consumed as u64;
+ self.total_out += res.bytes_written as u64;
+
+ match res.status {
+ Ok(status) => match status {
+ MZStatus::Ok => Ok(Status::Ok),
+ MZStatus::StreamEnd => Ok(Status::StreamEnd),
+ MZStatus::NeedDict => {
+ mem::decompress_need_dict(self.inner.decompressor().adler32().unwrap_or(0))
+ }
+ },
+ Err(status) => match status {
+ MZError::Buf => Ok(Status::BufError),
+ _ => mem::decompress_failed(ErrorMessage),
+ },
+ }
+ }
+
+ fn reset(&mut self, zlib_header: bool) {
+ self.inner.reset(format_from_bool(zlib_header));
+ self.total_in = 0;
+ self.total_out = 0;
+ }
+}
+
+impl Backend for Inflate {
+ #[inline]
+ fn total_in(&self) -> u64 {
+ self.total_in
+ }
+
+ #[inline]
+ fn total_out(&self) -> u64 {
+ self.total_out
+ }
+}
+
+pub struct Deflate {
+ inner: Box<CompressorOxide>,
+ total_in: u64,
+ total_out: u64,
+}
+
+impl fmt::Debug for Deflate {
+ fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+ write!(
+ f,
+ "miniz_oxide deflate internal state. total_in: {}, total_out: {}",
+ self.total_in, self.total_out,
+ )
+ }
+}
+
+impl DeflateBackend for Deflate {
+ fn make(level: Compression, zlib_header: bool, _window_bits: u8) -> Self {
+ // Check in case the integer value changes at some point.
+ debug_assert!(level.level() <= 10);
+
+ let mut inner: Box<CompressorOxide> = Box::default();
+ let format = format_from_bool(zlib_header);
+ inner.set_format_and_level(format, level.level().try_into().unwrap_or(1));
+
+ Deflate {
+ inner,
+ total_in: 0,
+ total_out: 0,
+ }
+ }
+
+ fn compress(
+ &mut self,
+ input: &[u8],
+ output: &mut [u8],
+ flush: FlushCompress,
+ ) -> Result<Status, CompressError> {
+ let flush = MZFlush::new(flush as i32).unwrap();
+ let res = deflate::stream::deflate(&mut self.inner, input, output, flush);
+ self.total_in += res.bytes_consumed as u64;
+ self.total_out += res.bytes_written as u64;
+
+ match res.status {
+ Ok(status) => match status {
+ MZStatus::Ok => Ok(Status::Ok),
+ MZStatus::StreamEnd => Ok(Status::StreamEnd),
+ MZStatus::NeedDict => mem::compress_failed(ErrorMessage),
+ },
+ Err(status) => match status {
+ MZError::Buf => Ok(Status::BufError),
+ _ => mem::compress_failed(ErrorMessage),
+ },
+ }
+ }
+
+ fn reset(&mut self) {
+ self.total_in = 0;
+ self.total_out = 0;
+ self.inner.reset();
+ }
+}
+
+impl Backend for Deflate {
+ #[inline]
+ fn total_in(&self) -> u64 {
+ self.total_in
+ }
+
+ #[inline]
+ fn total_out(&self) -> u64 {
+ self.total_out
+ }
+}
diff --git a/vendor/flate2/src/gz/bufread.rs b/vendor/flate2/src/gz/bufread.rs
new file mode 100644
index 0000000..679b4a7
--- /dev/null
+++ b/vendor/flate2/src/gz/bufread.rs
@@ -0,0 +1,483 @@
+use std::cmp;
+use std::io;
+use std::io::prelude::*;
+use std::mem;
+
+use super::{corrupt, read_into, GzBuilder, GzHeader, GzHeaderParser};
+use crate::crc::CrcReader;
+use crate::deflate;
+use crate::Compression;
+
+fn copy(into: &mut [u8], from: &[u8], pos: &mut usize) -> usize {
+ let min = cmp::min(into.len(), from.len() - *pos);
+ for (slot, val) in into.iter_mut().zip(from[*pos..*pos + min].iter()) {
+ *slot = *val;
+ }
+ *pos += min;
+ min
+}
+
+/// A gzip streaming encoder
+///
+/// This structure implements a [`Read`] interface. When read from, it reads
+/// uncompressed data from the underlying [`BufRead`] and provides the compressed data.
+///
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+/// [`BufRead`]: https://doc.rust-lang.org/std/io/trait.BufRead.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// use flate2::Compression;
+/// use flate2::bufread::GzEncoder;
+/// use std::fs::File;
+/// use std::io::BufReader;
+///
+/// // Opens sample file, compresses the contents and returns a Vector or error
+/// // File wrapped in a BufReader implements BufRead
+///
+/// fn open_hello_world() -> io::Result<Vec<u8>> {
+/// let f = File::open("examples/hello_world.txt")?;
+/// let b = BufReader::new(f);
+/// let mut gz = GzEncoder::new(b, Compression::fast());
+/// let mut buffer = Vec::new();
+/// gz.read_to_end(&mut buffer)?;
+/// Ok(buffer)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct GzEncoder<R> {
+ inner: deflate::bufread::DeflateEncoder<CrcReader<R>>,
+ header: Vec<u8>,
+ pos: usize,
+ eof: bool,
+}
+
+pub fn gz_encoder<R: BufRead>(header: Vec<u8>, r: R, lvl: Compression) -> GzEncoder<R> {
+ let crc = CrcReader::new(r);
+ GzEncoder {
+ inner: deflate::bufread::DeflateEncoder::new(crc, lvl),
+ header,
+ pos: 0,
+ eof: false,
+ }
+}
+
+impl<R: BufRead> GzEncoder<R> {
+ /// Creates a new encoder which will use the given compression level.
+ ///
+ /// The encoder is not configured specially for the emitted header. For
+ /// header configuration, see the `GzBuilder` type.
+ ///
+ /// The data read from the stream `r` will be compressed and available
+ /// through the returned reader.
+ pub fn new(r: R, level: Compression) -> GzEncoder<R> {
+ GzBuilder::new().buf_read(r, level)
+ }
+
+ fn read_footer(&mut self, into: &mut [u8]) -> io::Result<usize> {
+ if self.pos == 8 {
+ return Ok(0);
+ }
+ let crc = self.inner.get_ref().crc();
+ let ref arr = [
+ (crc.sum() >> 0) as u8,
+ (crc.sum() >> 8) as u8,
+ (crc.sum() >> 16) as u8,
+ (crc.sum() >> 24) as u8,
+ (crc.amount() >> 0) as u8,
+ (crc.amount() >> 8) as u8,
+ (crc.amount() >> 16) as u8,
+ (crc.amount() >> 24) as u8,
+ ];
+ Ok(copy(into, arr, &mut self.pos))
+ }
+}
+
+impl<R> GzEncoder<R> {
+ /// Acquires a reference to the underlying reader.
+ pub fn get_ref(&self) -> &R {
+ self.inner.get_ref().get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying reader.
+ ///
+ /// Note that mutation of the reader may result in surprising results if
+ /// this encoder is continued to be used.
+ pub fn get_mut(&mut self) -> &mut R {
+ self.inner.get_mut().get_mut()
+ }
+
+ /// Returns the underlying stream, consuming this encoder
+ pub fn into_inner(self) -> R {
+ self.inner.into_inner().into_inner()
+ }
+}
+
+#[inline]
+fn finish(buf: &[u8; 8]) -> (u32, u32) {
+ let crc = ((buf[0] as u32) << 0)
+ | ((buf[1] as u32) << 8)
+ | ((buf[2] as u32) << 16)
+ | ((buf[3] as u32) << 24);
+ let amt = ((buf[4] as u32) << 0)
+ | ((buf[5] as u32) << 8)
+ | ((buf[6] as u32) << 16)
+ | ((buf[7] as u32) << 24);
+ (crc, amt)
+}
+
+impl<R: BufRead> Read for GzEncoder<R> {
+ fn read(&mut self, mut into: &mut [u8]) -> io::Result<usize> {
+ let mut amt = 0;
+ if self.eof {
+ return self.read_footer(into);
+ } else if self.pos < self.header.len() {
+ amt += copy(into, &self.header, &mut self.pos);
+ if amt == into.len() {
+ return Ok(amt);
+ }
+ let tmp = into;
+ into = &mut tmp[amt..];
+ }
+ match self.inner.read(into)? {
+ 0 => {
+ self.eof = true;
+ self.pos = 0;
+ self.read_footer(into)
+ }
+ n => Ok(amt + n),
+ }
+ }
+}
+
+impl<R: BufRead + Write> Write for GzEncoder<R> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.get_mut().write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.get_mut().flush()
+ }
+}
+
+/// A decoder for a single member of a [gzip file].
+///
+/// This structure implements a [`Read`] interface. When read from, it reads
+/// compressed data from the underlying [`BufRead`] and provides the uncompressed data.
+///
+/// After reading a single member of the gzip data this reader will return
+/// Ok(0) even if there are more bytes available in the underlying reader.
+/// If you need the following bytes, call `into_inner()` after Ok(0) to
+/// recover the underlying reader.
+///
+/// To handle gzip files that may have multiple members, see [`MultiGzDecoder`]
+/// or read more
+/// [in the introduction](../index.html#about-multi-member-gzip-files).
+///
+/// [gzip file]: https://www.rfc-editor.org/rfc/rfc1952#page-5
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+/// [`BufRead`]: https://doc.rust-lang.org/std/io/trait.BufRead.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// # use flate2::Compression;
+/// # use flate2::write::GzEncoder;
+/// use flate2::bufread::GzDecoder;
+///
+/// # fn main() {
+/// # let mut e = GzEncoder::new(Vec::new(), Compression::default());
+/// # e.write_all(b"Hello World").unwrap();
+/// # let bytes = e.finish().unwrap();
+/// # println!("{}", decode_reader(bytes).unwrap());
+/// # }
+/// #
+/// // Uncompresses a Gz Encoded vector of bytes and returns a string or error
+/// // Here &[u8] implements BufRead
+///
+/// fn decode_reader(bytes: Vec<u8>) -> io::Result<String> {
+/// let mut gz = GzDecoder::new(&bytes[..]);
+/// let mut s = String::new();
+/// gz.read_to_string(&mut s)?;
+/// Ok(s)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct GzDecoder<R> {
+ state: GzState,
+ reader: CrcReader<deflate::bufread::DeflateDecoder<R>>,
+ multi: bool,
+}
+
+#[derive(Debug)]
+enum GzState {
+ Header(GzHeaderParser),
+ Body(GzHeader),
+ Finished(GzHeader, usize, [u8; 8]),
+ Err(io::Error),
+ End(Option<GzHeader>),
+}
+
+impl<R: BufRead> GzDecoder<R> {
+ /// Creates a new decoder from the given reader, immediately parsing the
+ /// gzip header.
+ pub fn new(mut r: R) -> GzDecoder<R> {
+ let mut header_parser = GzHeaderParser::new();
+
+ let state = match header_parser.parse(&mut r) {
+ Ok(_) => GzState::Body(GzHeader::from(header_parser)),
+ Err(ref err) if io::ErrorKind::WouldBlock == err.kind() => {
+ GzState::Header(header_parser)
+ }
+ Err(err) => GzState::Err(err),
+ };
+
+ GzDecoder {
+ state,
+ reader: CrcReader::new(deflate::bufread::DeflateDecoder::new(r)),
+ multi: false,
+ }
+ }
+
+ fn multi(mut self, flag: bool) -> GzDecoder<R> {
+ self.multi = flag;
+ self
+ }
+}
+
+impl<R> GzDecoder<R> {
+ /// Returns the header associated with this stream, if it was valid
+ pub fn header(&self) -> Option<&GzHeader> {
+ match &self.state {
+ GzState::Body(header) | GzState::Finished(header, _, _) => Some(header),
+ GzState::End(header) => header.as_ref(),
+ _ => None,
+ }
+ }
+
+ /// Acquires a reference to the underlying reader.
+ pub fn get_ref(&self) -> &R {
+ self.reader.get_ref().get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying stream.
+ ///
+ /// Note that mutation of the stream may result in surprising results if
+ /// this decoder is continued to be used.
+ pub fn get_mut(&mut self) -> &mut R {
+ self.reader.get_mut().get_mut()
+ }
+
+ /// Consumes this decoder, returning the underlying reader.
+ pub fn into_inner(self) -> R {
+ self.reader.into_inner().into_inner()
+ }
+}
+
+impl<R: BufRead> Read for GzDecoder<R> {
+ fn read(&mut self, into: &mut [u8]) -> io::Result<usize> {
+ loop {
+ match &mut self.state {
+ GzState::Header(parser) => {
+ parser.parse(self.reader.get_mut().get_mut())?;
+ self.state = GzState::Body(GzHeader::from(mem::take(parser)));
+ }
+ GzState::Body(header) => {
+ if into.is_empty() {
+ return Ok(0);
+ }
+ match self.reader.read(into)? {
+ 0 => {
+ self.state = GzState::Finished(mem::take(header), 0, [0; 8]);
+ }
+ n => {
+ return Ok(n);
+ }
+ }
+ }
+ GzState::Finished(header, pos, buf) => {
+ if *pos < buf.len() {
+ *pos += read_into(self.reader.get_mut().get_mut(), &mut buf[*pos..])?;
+ } else {
+ let (crc, amt) = finish(&buf);
+
+ if crc != self.reader.crc().sum() || amt != self.reader.crc().amount() {
+ self.state = GzState::End(Some(mem::take(header)));
+ return Err(corrupt());
+ } else if self.multi {
+ let is_eof = self
+ .reader
+ .get_mut()
+ .get_mut()
+ .fill_buf()
+ .map(|buf| buf.is_empty())?;
+
+ if is_eof {
+ self.state = GzState::End(Some(mem::take(header)));
+ } else {
+ self.reader.reset();
+ self.reader.get_mut().reset_data();
+ self.state = GzState::Header(GzHeaderParser::new())
+ }
+ } else {
+ self.state = GzState::End(Some(mem::take(header)));
+ }
+ }
+ }
+ GzState::Err(err) => {
+ let result = Err(mem::replace(err, io::ErrorKind::Other.into()));
+ self.state = GzState::End(None);
+ return result;
+ }
+ GzState::End(_) => return Ok(0),
+ }
+ }
+ }
+}
+
+impl<R: BufRead + Write> Write for GzDecoder<R> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.get_mut().write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.get_mut().flush()
+ }
+}
+
+/// A gzip streaming decoder that decodes a [gzip file] that may have multiple members.
+///
+/// This structure implements a [`Read`] interface. When read from, it reads
+/// compressed data from the underlying [`BufRead`] and provides the uncompressed data.
+///
+/// A gzip file consists of a series of *members* concatenated one after another.
+/// MultiGzDecoder decodes all members from the data and only returns Ok(0) when the
+/// underlying reader does. For a file, this reads to the end of the file.
+///
+/// To handle members seperately, see [GzDecoder] or read more
+/// [in the introduction](../index.html#about-multi-member-gzip-files).
+///
+/// [gzip file]: https://www.rfc-editor.org/rfc/rfc1952#page-5
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+/// [`BufRead`]: https://doc.rust-lang.org/std/io/trait.BufRead.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// # use flate2::Compression;
+/// # use flate2::write::GzEncoder;
+/// use flate2::bufread::MultiGzDecoder;
+///
+/// # fn main() {
+/// # let mut e = GzEncoder::new(Vec::new(), Compression::default());
+/// # e.write_all(b"Hello World").unwrap();
+/// # let bytes = e.finish().unwrap();
+/// # println!("{}", decode_reader(bytes).unwrap());
+/// # }
+/// #
+/// // Uncompresses a Gz Encoded vector of bytes and returns a string or error
+/// // Here &[u8] implements BufRead
+///
+/// fn decode_reader(bytes: Vec<u8>) -> io::Result<String> {
+/// let mut gz = MultiGzDecoder::new(&bytes[..]);
+/// let mut s = String::new();
+/// gz.read_to_string(&mut s)?;
+/// Ok(s)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct MultiGzDecoder<R>(GzDecoder<R>);
+
+impl<R: BufRead> MultiGzDecoder<R> {
+ /// Creates a new decoder from the given reader, immediately parsing the
+ /// (first) gzip header. If the gzip stream contains multiple members all will
+ /// be decoded.
+ pub fn new(r: R) -> MultiGzDecoder<R> {
+ MultiGzDecoder(GzDecoder::new(r).multi(true))
+ }
+}
+
+impl<R> MultiGzDecoder<R> {
+ /// Returns the current header associated with this stream, if it's valid
+ pub fn header(&self) -> Option<&GzHeader> {
+ self.0.header()
+ }
+
+ /// Acquires a reference to the underlying reader.
+ pub fn get_ref(&self) -> &R {
+ self.0.get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying stream.
+ ///
+ /// Note that mutation of the stream may result in surprising results if
+ /// this decoder is continued to be used.
+ pub fn get_mut(&mut self) -> &mut R {
+ self.0.get_mut()
+ }
+
+ /// Consumes this decoder, returning the underlying reader.
+ pub fn into_inner(self) -> R {
+ self.0.into_inner()
+ }
+}
+
+impl<R: BufRead> Read for MultiGzDecoder<R> {
+ fn read(&mut self, into: &mut [u8]) -> io::Result<usize> {
+ self.0.read(into)
+ }
+}
+
+#[cfg(test)]
+mod test {
+ use crate::bufread::GzDecoder;
+ use crate::gz::write;
+ use crate::Compression;
+ use std::io::{Read, Write};
+
+ // GzDecoder consumes one gzip member and then returns 0 for subsequent reads, allowing any
+ // additional data to be consumed by the caller.
+ #[test]
+ fn decode_extra_data() {
+ let expected = "Hello World";
+
+ let compressed = {
+ let mut e = write::GzEncoder::new(Vec::new(), Compression::default());
+ e.write(expected.as_ref()).unwrap();
+ let mut b = e.finish().unwrap();
+ b.push(b'x');
+ b
+ };
+
+ let mut output = Vec::new();
+ let mut decoder = GzDecoder::new(compressed.as_slice());
+ let decoded_bytes = decoder.read_to_end(&mut output).unwrap();
+ assert_eq!(decoded_bytes, output.len());
+ let actual = std::str::from_utf8(&output).expect("String parsing error");
+ assert_eq!(
+ actual, expected,
+ "after decompression we obtain the original input"
+ );
+
+ output.clear();
+ assert_eq!(
+ decoder.read(&mut output).unwrap(),
+ 0,
+ "subsequent read of decoder returns 0, but inner reader can return additional data"
+ );
+ let mut reader = decoder.into_inner();
+ assert_eq!(
+ reader.read_to_end(&mut output).unwrap(),
+ 1,
+ "extra data is accessible in underlying buf-read"
+ );
+ assert_eq!(output, b"x");
+ }
+}
diff --git a/vendor/flate2/src/gz/mod.rs b/vendor/flate2/src/gz/mod.rs
new file mode 100644
index 0000000..31a6961
--- /dev/null
+++ b/vendor/flate2/src/gz/mod.rs
@@ -0,0 +1,644 @@
+use std::ffi::CString;
+use std::io::{BufRead, Error, ErrorKind, Read, Result, Write};
+use std::time;
+
+use crate::bufreader::BufReader;
+use crate::{Compression, Crc};
+
+pub static FHCRC: u8 = 1 << 1;
+pub static FEXTRA: u8 = 1 << 2;
+pub static FNAME: u8 = 1 << 3;
+pub static FCOMMENT: u8 = 1 << 4;
+pub static FRESERVED: u8 = 1 << 5 | 1 << 6 | 1 << 7;
+
+pub mod bufread;
+pub mod read;
+pub mod write;
+
+// The maximum length of the header filename and comment fields. More than
+// enough for these fields in reasonable use, but prevents possible attacks.
+const MAX_HEADER_BUF: usize = 65535;
+
+/// A structure representing the header of a gzip stream.
+///
+/// The header can contain metadata about the file that was compressed, if
+/// present.
+#[derive(PartialEq, Clone, Debug, Default)]
+pub struct GzHeader {
+ extra: Option<Vec<u8>>,
+ filename: Option<Vec<u8>>,
+ comment: Option<Vec<u8>>,
+ operating_system: u8,
+ mtime: u32,
+}
+
+impl GzHeader {
+ /// Returns the `filename` field of this gzip stream's header, if present.
+ pub fn filename(&self) -> Option<&[u8]> {
+ self.filename.as_ref().map(|s| &s[..])
+ }
+
+ /// Returns the `extra` field of this gzip stream's header, if present.
+ pub fn extra(&self) -> Option<&[u8]> {
+ self.extra.as_ref().map(|s| &s[..])
+ }
+
+ /// Returns the `comment` field of this gzip stream's header, if present.
+ pub fn comment(&self) -> Option<&[u8]> {
+ self.comment.as_ref().map(|s| &s[..])
+ }
+
+ /// Returns the `operating_system` field of this gzip stream's header.
+ ///
+ /// There are predefined values for various operating systems.
+ /// 255 means that the value is unknown.
+ pub fn operating_system(&self) -> u8 {
+ self.operating_system
+ }
+
+ /// This gives the most recent modification time of the original file being compressed.
+ ///
+ /// The time is in Unix format, i.e., seconds since 00:00:00 GMT, Jan. 1, 1970.
+ /// (Note that this may cause problems for MS-DOS and other systems that use local
+ /// rather than Universal time.) If the compressed data did not come from a file,
+ /// `mtime` is set to the time at which compression started.
+ /// `mtime` = 0 means no time stamp is available.
+ ///
+ /// The usage of `mtime` is discouraged because of Year 2038 problem.
+ pub fn mtime(&self) -> u32 {
+ self.mtime
+ }
+
+ /// Returns the most recent modification time represented by a date-time type.
+ /// Returns `None` if the value of the underlying counter is 0,
+ /// indicating no time stamp is available.
+ ///
+ ///
+ /// The time is measured as seconds since 00:00:00 GMT, Jan. 1 1970.
+ /// See [`mtime`](#method.mtime) for more detail.
+ pub fn mtime_as_datetime(&self) -> Option<time::SystemTime> {
+ if self.mtime == 0 {
+ None
+ } else {
+ let duration = time::Duration::new(u64::from(self.mtime), 0);
+ let datetime = time::UNIX_EPOCH + duration;
+ Some(datetime)
+ }
+ }
+}
+
+#[derive(Debug)]
+pub enum GzHeaderState {
+ Start(u8, [u8; 10]),
+ Xlen(Option<Box<Crc>>, u8, [u8; 2]),
+ Extra(Option<Box<Crc>>, u16),
+ Filename(Option<Box<Crc>>),
+ Comment(Option<Box<Crc>>),
+ Crc(Option<Box<Crc>>, u8, [u8; 2]),
+ Complete,
+}
+
+impl Default for GzHeaderState {
+ fn default() -> Self {
+ Self::Complete
+ }
+}
+
+#[derive(Debug, Default)]
+pub struct GzHeaderParser {
+ state: GzHeaderState,
+ flags: u8,
+ header: GzHeader,
+}
+
+impl GzHeaderParser {
+ fn new() -> Self {
+ GzHeaderParser {
+ state: GzHeaderState::Start(0, [0; 10]),
+ flags: 0,
+ header: GzHeader::default(),
+ }
+ }
+
+ fn parse<'a, R: Read>(&mut self, r: &'a mut R) -> Result<()> {
+ loop {
+ match &mut self.state {
+ GzHeaderState::Start(count, buffer) => {
+ while (*count as usize) < buffer.len() {
+ *count += read_into(r, &mut buffer[*count as usize..])? as u8;
+ }
+ // Gzip identification bytes
+ if buffer[0] != 0x1f || buffer[1] != 0x8b {
+ return Err(bad_header());
+ }
+ // Gzip compression method (8 = deflate)
+ if buffer[2] != 8 {
+ return Err(bad_header());
+ }
+ self.flags = buffer[3];
+ // RFC1952: "must give an error indication if any reserved bit is non-zero"
+ if self.flags & FRESERVED != 0 {
+ return Err(bad_header());
+ }
+ self.header.mtime = ((buffer[4] as u32) << 0)
+ | ((buffer[5] as u32) << 8)
+ | ((buffer[6] as u32) << 16)
+ | ((buffer[7] as u32) << 24);
+ let _xfl = buffer[8];
+ self.header.operating_system = buffer[9];
+ let crc = if self.flags & FHCRC != 0 {
+ let mut crc = Box::new(Crc::new());
+ crc.update(buffer);
+ Some(crc)
+ } else {
+ None
+ };
+ self.state = GzHeaderState::Xlen(crc, 0, [0; 2]);
+ }
+ GzHeaderState::Xlen(crc, count, buffer) => {
+ if self.flags & FEXTRA != 0 {
+ while (*count as usize) < buffer.len() {
+ *count += read_into(r, &mut buffer[*count as usize..])? as u8;
+ }
+ if let Some(crc) = crc {
+ crc.update(buffer);
+ }
+ let xlen = parse_le_u16(&buffer);
+ self.header.extra = Some(vec![0; xlen as usize]);
+ self.state = GzHeaderState::Extra(crc.take(), 0);
+ } else {
+ self.state = GzHeaderState::Filename(crc.take());
+ }
+ }
+ GzHeaderState::Extra(crc, count) => {
+ debug_assert!(self.header.extra.is_some());
+ let extra = self.header.extra.as_mut().unwrap();
+ while (*count as usize) < extra.len() {
+ *count += read_into(r, &mut extra[*count as usize..])? as u16;
+ }
+ if let Some(crc) = crc {
+ crc.update(extra);
+ }
+ self.state = GzHeaderState::Filename(crc.take());
+ }
+ GzHeaderState::Filename(crc) => {
+ if self.flags & FNAME != 0 {
+ let filename = self.header.filename.get_or_insert_with(Vec::new);
+ read_to_nul(r, filename)?;
+ if let Some(crc) = crc {
+ crc.update(filename);
+ crc.update(b"\0");
+ }
+ }
+ self.state = GzHeaderState::Comment(crc.take());
+ }
+ GzHeaderState::Comment(crc) => {
+ if self.flags & FCOMMENT != 0 {
+ let comment = self.header.comment.get_or_insert_with(Vec::new);
+ read_to_nul(r, comment)?;
+ if let Some(crc) = crc {
+ crc.update(comment);
+ crc.update(b"\0");
+ }
+ }
+ self.state = GzHeaderState::Crc(crc.take(), 0, [0; 2]);
+ }
+ GzHeaderState::Crc(crc, count, buffer) => {
+ if let Some(crc) = crc {
+ debug_assert!(self.flags & FHCRC != 0);
+ while (*count as usize) < buffer.len() {
+ *count += read_into(r, &mut buffer[*count as usize..])? as u8;
+ }
+ let stored_crc = parse_le_u16(&buffer);
+ let calced_crc = crc.sum() as u16;
+ if stored_crc != calced_crc {
+ return Err(corrupt());
+ }
+ }
+ self.state = GzHeaderState::Complete;
+ }
+ GzHeaderState::Complete => {
+ return Ok(());
+ }
+ }
+ }
+ }
+
+ fn header(&self) -> Option<&GzHeader> {
+ match self.state {
+ GzHeaderState::Complete => Some(&self.header),
+ _ => None,
+ }
+ }
+}
+
+impl From<GzHeaderParser> for GzHeader {
+ fn from(parser: GzHeaderParser) -> Self {
+ debug_assert!(matches!(parser.state, GzHeaderState::Complete));
+ parser.header
+ }
+}
+
+// Attempt to fill the `buffer` from `r`. Return the number of bytes read.
+// Return an error if EOF is read before the buffer is full. This differs
+// from `read` in that Ok(0) means that more data may be available.
+fn read_into<R: Read>(r: &mut R, buffer: &mut [u8]) -> Result<usize> {
+ debug_assert!(!buffer.is_empty());
+ match r.read(buffer) {
+ Ok(0) => Err(ErrorKind::UnexpectedEof.into()),
+ Ok(n) => Ok(n),
+ Err(ref e) if e.kind() == ErrorKind::Interrupted => Ok(0),
+ Err(e) => Err(e),
+ }
+}
+
+// Read `r` up to the first nul byte, pushing non-nul bytes to `buffer`.
+fn read_to_nul<R: Read>(r: &mut R, buffer: &mut Vec<u8>) -> Result<()> {
+ let mut bytes = r.bytes();
+ loop {
+ match bytes.next().transpose()? {
+ Some(byte) if byte == 0 => {
+ return Ok(());
+ }
+ Some(_) if buffer.len() == MAX_HEADER_BUF => {
+ return Err(Error::new(
+ ErrorKind::InvalidInput,
+ "gzip header field too long",
+ ));
+ }
+ Some(byte) => {
+ buffer.push(byte);
+ }
+ None => {
+ return Err(ErrorKind::UnexpectedEof.into());
+ }
+ }
+ }
+}
+
+fn parse_le_u16(buffer: &[u8; 2]) -> u16 {
+ (buffer[0] as u16) | ((buffer[1] as u16) << 8)
+}
+
+fn bad_header() -> Error {
+ Error::new(ErrorKind::InvalidInput, "invalid gzip header")
+}
+
+fn corrupt() -> Error {
+ Error::new(
+ ErrorKind::InvalidInput,
+ "corrupt gzip stream does not have a matching checksum",
+ )
+}
+
+/// A builder structure to create a new gzip Encoder.
+///
+/// This structure controls header configuration options such as the filename.
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// # use std::io;
+/// use std::fs::File;
+/// use flate2::GzBuilder;
+/// use flate2::Compression;
+///
+/// // GzBuilder opens a file and writes a sample string using GzBuilder pattern
+///
+/// # fn sample_builder() -> Result<(), io::Error> {
+/// let f = File::create("examples/hello_world.gz")?;
+/// let mut gz = GzBuilder::new()
+/// .filename("hello_world.txt")
+/// .comment("test file, please delete")
+/// .write(f, Compression::default());
+/// gz.write_all(b"hello world")?;
+/// gz.finish()?;
+/// # Ok(())
+/// # }
+/// ```
+#[derive(Debug)]
+pub struct GzBuilder {
+ extra: Option<Vec<u8>>,
+ filename: Option<CString>,
+ comment: Option<CString>,
+ operating_system: Option<u8>,
+ mtime: u32,
+}
+
+impl Default for GzBuilder {
+ fn default() -> Self {
+ Self::new()
+ }
+}
+
+impl GzBuilder {
+ /// Create a new blank builder with no header by default.
+ pub fn new() -> GzBuilder {
+ GzBuilder {
+ extra: None,
+ filename: None,
+ comment: None,
+ operating_system: None,
+ mtime: 0,
+ }
+ }
+
+ /// Configure the `mtime` field in the gzip header.
+ pub fn mtime(mut self, mtime: u32) -> GzBuilder {
+ self.mtime = mtime;
+ self
+ }
+
+ /// Configure the `operating_system` field in the gzip header.
+ pub fn operating_system(mut self, os: u8) -> GzBuilder {
+ self.operating_system = Some(os);
+ self
+ }
+
+ /// Configure the `extra` field in the gzip header.
+ pub fn extra<T: Into<Vec<u8>>>(mut self, extra: T) -> GzBuilder {
+ self.extra = Some(extra.into());
+ self
+ }
+
+ /// Configure the `filename` field in the gzip header.
+ ///
+ /// # Panics
+ ///
+ /// Panics if the `filename` slice contains a zero.
+ pub fn filename<T: Into<Vec<u8>>>(mut self, filename: T) -> GzBuilder {
+ self.filename = Some(CString::new(filename.into()).unwrap());
+ self
+ }
+
+ /// Configure the `comment` field in the gzip header.
+ ///
+ /// # Panics
+ ///
+ /// Panics if the `comment` slice contains a zero.
+ pub fn comment<T: Into<Vec<u8>>>(mut self, comment: T) -> GzBuilder {
+ self.comment = Some(CString::new(comment.into()).unwrap());
+ self
+ }
+
+ /// Consume this builder, creating a writer encoder in the process.
+ ///
+ /// The data written to the returned encoder will be compressed and then
+ /// written out to the supplied parameter `w`.
+ pub fn write<W: Write>(self, w: W, lvl: Compression) -> write::GzEncoder<W> {
+ write::gz_encoder(self.into_header(lvl), w, lvl)
+ }
+
+ /// Consume this builder, creating a reader encoder in the process.
+ ///
+ /// Data read from the returned encoder will be the compressed version of
+ /// the data read from the given reader.
+ pub fn read<R: Read>(self, r: R, lvl: Compression) -> read::GzEncoder<R> {
+ read::gz_encoder(self.buf_read(BufReader::new(r), lvl))
+ }
+
+ /// Consume this builder, creating a reader encoder in the process.
+ ///
+ /// Data read from the returned encoder will be the compressed version of
+ /// the data read from the given reader.
+ pub fn buf_read<R>(self, r: R, lvl: Compression) -> bufread::GzEncoder<R>
+ where
+ R: BufRead,
+ {
+ bufread::gz_encoder(self.into_header(lvl), r, lvl)
+ }
+
+ fn into_header(self, lvl: Compression) -> Vec<u8> {
+ let GzBuilder {
+ extra,
+ filename,
+ comment,
+ operating_system,
+ mtime,
+ } = self;
+ let mut flg = 0;
+ let mut header = vec![0u8; 10];
+ if let Some(v) = extra {
+ flg |= FEXTRA;
+ header.push((v.len() >> 0) as u8);
+ header.push((v.len() >> 8) as u8);
+ header.extend(v);
+ }
+ if let Some(filename) = filename {
+ flg |= FNAME;
+ header.extend(filename.as_bytes_with_nul().iter().copied());
+ }
+ if let Some(comment) = comment {
+ flg |= FCOMMENT;
+ header.extend(comment.as_bytes_with_nul().iter().copied());
+ }
+ header[0] = 0x1f;
+ header[1] = 0x8b;
+ header[2] = 8;
+ header[3] = flg;
+ header[4] = (mtime >> 0) as u8;
+ header[5] = (mtime >> 8) as u8;
+ header[6] = (mtime >> 16) as u8;
+ header[7] = (mtime >> 24) as u8;
+ header[8] = if lvl.0 >= Compression::best().0 {
+ 2
+ } else if lvl.0 <= Compression::fast().0 {
+ 4
+ } else {
+ 0
+ };
+
+ // Typically this byte indicates what OS the gz stream was created on,
+ // but in an effort to have cross-platform reproducible streams just
+ // default this value to 255. I'm not sure that if we "correctly" set
+ // this it'd do anything anyway...
+ header[9] = operating_system.unwrap_or(255);
+ header
+ }
+}
+
+#[cfg(test)]
+mod tests {
+ use std::io::prelude::*;
+
+ use super::{read, write, GzBuilder, GzHeaderParser};
+ use crate::{Compression, GzHeader};
+ use rand::{thread_rng, Rng};
+
+ #[test]
+ fn roundtrip() {
+ let mut e = write::GzEncoder::new(Vec::new(), Compression::default());
+ e.write_all(b"foo bar baz").unwrap();
+ let inner = e.finish().unwrap();
+ let mut d = read::GzDecoder::new(&inner[..]);
+ let mut s = String::new();
+ d.read_to_string(&mut s).unwrap();
+ assert_eq!(s, "foo bar baz");
+ }
+
+ #[test]
+ fn roundtrip_zero() {
+ let e = write::GzEncoder::new(Vec::new(), Compression::default());
+ let inner = e.finish().unwrap();
+ let mut d = read::GzDecoder::new(&inner[..]);
+ let mut s = String::new();
+ d.read_to_string(&mut s).unwrap();
+ assert_eq!(s, "");
+ }
+
+ #[test]
+ fn roundtrip_big() {
+ let mut real = Vec::new();
+ let mut w = write::GzEncoder::new(Vec::new(), Compression::default());
+ let v = crate::random_bytes().take(1024).collect::<Vec<_>>();
+ for _ in 0..200 {
+ let to_write = &v[..thread_rng().gen_range(0..v.len())];
+ real.extend(to_write.iter().copied());
+ w.write_all(to_write).unwrap();
+ }
+ let result = w.finish().unwrap();
+ let mut r = read::GzDecoder::new(&result[..]);
+ let mut v = Vec::new();
+ r.read_to_end(&mut v).unwrap();
+ assert_eq!(v, real);
+ }
+
+ #[test]
+ fn roundtrip_big2() {
+ let v = crate::random_bytes().take(1024 * 1024).collect::<Vec<_>>();
+ let mut r = read::GzDecoder::new(read::GzEncoder::new(&v[..], Compression::default()));
+ let mut res = Vec::new();
+ r.read_to_end(&mut res).unwrap();
+ assert_eq!(res, v);
+ }
+
+ // A Rust implementation of CRC that closely matches the C code in RFC1952.
+ // Only use this to create CRCs for tests.
+ struct Rfc1952Crc {
+ /* Table of CRCs of all 8-bit messages. */
+ crc_table: [u32; 256],
+ }
+
+ impl Rfc1952Crc {
+ fn new() -> Self {
+ let mut crc = Rfc1952Crc {
+ crc_table: [0; 256],
+ };
+ /* Make the table for a fast CRC. */
+ for n in 0usize..256 {
+ let mut c = n as u32;
+ for _k in 0..8 {
+ if c & 1 != 0 {
+ c = 0xedb88320 ^ (c >> 1);
+ } else {
+ c = c >> 1;
+ }
+ }
+ crc.crc_table[n] = c;
+ }
+ crc
+ }
+
+ /*
+ Update a running crc with the bytes buf and return
+ the updated crc. The crc should be initialized to zero. Pre- and
+ post-conditioning (one's complement) is performed within this
+ function so it shouldn't be done by the caller.
+ */
+ fn update_crc(&self, crc: u32, buf: &[u8]) -> u32 {
+ let mut c = crc ^ 0xffffffff;
+
+ for b in buf {
+ c = self.crc_table[(c as u8 ^ *b) as usize] ^ (c >> 8);
+ }
+ c ^ 0xffffffff
+ }
+
+ /* Return the CRC of the bytes buf. */
+ fn crc(&self, buf: &[u8]) -> u32 {
+ self.update_crc(0, buf)
+ }
+ }
+
+ #[test]
+ fn roundtrip_header() {
+ let mut header = GzBuilder::new()
+ .mtime(1234)
+ .operating_system(57)
+ .filename("filename")
+ .comment("comment")
+ .into_header(Compression::fast());
+
+ // Add a CRC to the header
+ header[3] = header[3] ^ super::FHCRC;
+ let rfc1952_crc = Rfc1952Crc::new();
+ let crc32 = rfc1952_crc.crc(&header);
+ let crc16 = crc32 as u16;
+ header.extend(&crc16.to_le_bytes());
+
+ let mut parser = GzHeaderParser::new();
+ parser.parse(&mut header.as_slice()).unwrap();
+ let actual = parser.header().unwrap();
+ assert_eq!(
+ actual,
+ &GzHeader {
+ extra: None,
+ filename: Some("filename".as_bytes().to_vec()),
+ comment: Some("comment".as_bytes().to_vec()),
+ operating_system: 57,
+ mtime: 1234
+ }
+ )
+ }
+
+ #[test]
+ fn fields() {
+ let r = vec![0, 2, 4, 6];
+ let e = GzBuilder::new()
+ .filename("foo.rs")
+ .comment("bar")
+ .extra(vec![0, 1, 2, 3])
+ .read(&r[..], Compression::default());
+ let mut d = read::GzDecoder::new(e);
+ assert_eq!(d.header().unwrap().filename(), Some(&b"foo.rs"[..]));
+ assert_eq!(d.header().unwrap().comment(), Some(&b"bar"[..]));
+ assert_eq!(d.header().unwrap().extra(), Some(&b"\x00\x01\x02\x03"[..]));
+ let mut res = Vec::new();
+ d.read_to_end(&mut res).unwrap();
+ assert_eq!(res, vec![0, 2, 4, 6]);
+ }
+
+ #[test]
+ fn keep_reading_after_end() {
+ let mut e = write::GzEncoder::new(Vec::new(), Compression::default());
+ e.write_all(b"foo bar baz").unwrap();
+ let inner = e.finish().unwrap();
+ let mut d = read::GzDecoder::new(&inner[..]);
+ let mut s = String::new();
+ d.read_to_string(&mut s).unwrap();
+ assert_eq!(s, "foo bar baz");
+ d.read_to_string(&mut s).unwrap();
+ assert_eq!(s, "foo bar baz");
+ }
+
+ #[test]
+ fn qc_reader() {
+ ::quickcheck::quickcheck(test as fn(_) -> _);
+
+ fn test(v: Vec<u8>) -> bool {
+ let r = read::GzEncoder::new(&v[..], Compression::default());
+ let mut r = read::GzDecoder::new(r);
+ let mut v2 = Vec::new();
+ r.read_to_end(&mut v2).unwrap();
+ v == v2
+ }
+ }
+
+ #[test]
+ fn flush_after_write() {
+ let mut f = write::GzEncoder::new(Vec::new(), Compression::default());
+ write!(f, "Hello world").unwrap();
+ f.flush().unwrap();
+ }
+}
diff --git a/vendor/flate2/src/gz/read.rs b/vendor/flate2/src/gz/read.rs
new file mode 100644
index 0000000..9dbadbd
--- /dev/null
+++ b/vendor/flate2/src/gz/read.rs
@@ -0,0 +1,378 @@
+use std::io;
+use std::io::prelude::*;
+
+use super::bufread;
+use super::{GzBuilder, GzHeader};
+use crate::bufreader::BufReader;
+use crate::Compression;
+
+/// A gzip streaming encoder
+///
+/// This structure implements a [`Read`] interface. When read from, it reads
+/// uncompressed data from the underlying [`Read`] and provides the compressed data.
+///
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// use flate2::Compression;
+/// use flate2::read::GzEncoder;
+///
+/// // Return a vector containing the GZ compressed version of hello world
+///
+/// fn gzencode_hello_world() -> io::Result<Vec<u8>> {
+/// let mut ret_vec = Vec::new();
+/// let bytestring = b"hello world";
+/// let mut gz = GzEncoder::new(&bytestring[..], Compression::fast());
+/// gz.read_to_end(&mut ret_vec)?;
+/// Ok(ret_vec)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct GzEncoder<R> {
+ inner: bufread::GzEncoder<BufReader<R>>,
+}
+
+pub fn gz_encoder<R: Read>(inner: bufread::GzEncoder<BufReader<R>>) -> GzEncoder<R> {
+ GzEncoder { inner }
+}
+
+impl<R: Read> GzEncoder<R> {
+ /// Creates a new encoder which will use the given compression level.
+ ///
+ /// The encoder is not configured specially for the emitted header. For
+ /// header configuration, see the `GzBuilder` type.
+ ///
+ /// The data read from the stream `r` will be compressed and available
+ /// through the returned reader.
+ pub fn new(r: R, level: Compression) -> GzEncoder<R> {
+ GzBuilder::new().read(r, level)
+ }
+}
+
+impl<R> GzEncoder<R> {
+ /// Acquires a reference to the underlying reader.
+ pub fn get_ref(&self) -> &R {
+ self.inner.get_ref().get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying reader.
+ ///
+ /// Note that mutation of the reader may result in surprising results if
+ /// this encoder is continued to be used.
+ pub fn get_mut(&mut self) -> &mut R {
+ self.inner.get_mut().get_mut()
+ }
+
+ /// Returns the underlying stream, consuming this encoder
+ pub fn into_inner(self) -> R {
+ self.inner.into_inner().into_inner()
+ }
+}
+
+impl<R: Read> Read for GzEncoder<R> {
+ fn read(&mut self, into: &mut [u8]) -> io::Result<usize> {
+ self.inner.read(into)
+ }
+}
+
+impl<R: Read + Write> Write for GzEncoder<R> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.get_mut().write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.get_mut().flush()
+ }
+}
+
+/// A decoder for a single member of a [gzip file].
+///
+/// This structure implements a [`Read`] interface. When read from, it reads
+/// compressed data from the underlying [`Read`] and provides the uncompressed data.
+///
+/// After reading a single member of the gzip data this reader will return
+/// Ok(0) even if there are more bytes available in the underlying reader.
+/// `GzDecoder` may have read additional bytes past the end of the gzip data.
+/// If you need the following bytes, wrap the `Reader` in a `std::io::BufReader`
+/// and use `bufread::GzDecoder` instead.
+///
+/// To handle gzip files that may have multiple members, see [`MultiGzDecoder`]
+/// or read more
+/// [in the introduction](../index.html#about-multi-member-gzip-files).
+///
+/// [gzip file]: https://www.rfc-editor.org/rfc/rfc1952#page-5
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// # use flate2::Compression;
+/// # use flate2::write::GzEncoder;
+/// use flate2::read::GzDecoder;
+///
+/// # fn main() {
+/// # let mut e = GzEncoder::new(Vec::new(), Compression::default());
+/// # e.write_all(b"Hello World").unwrap();
+/// # let bytes = e.finish().unwrap();
+/// # println!("{}", decode_reader(bytes).unwrap());
+/// # }
+/// #
+/// // Uncompresses a Gz Encoded vector of bytes and returns a string or error
+/// // Here &[u8] implements Read
+///
+/// fn decode_reader(bytes: Vec<u8>) -> io::Result<String> {
+/// let mut gz = GzDecoder::new(&bytes[..]);
+/// let mut s = String::new();
+/// gz.read_to_string(&mut s)?;
+/// Ok(s)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct GzDecoder<R> {
+ inner: bufread::GzDecoder<BufReader<R>>,
+}
+
+impl<R: Read> GzDecoder<R> {
+ /// Creates a new decoder from the given reader, immediately parsing the
+ /// gzip header.
+ pub fn new(r: R) -> GzDecoder<R> {
+ GzDecoder {
+ inner: bufread::GzDecoder::new(BufReader::new(r)),
+ }
+ }
+}
+
+impl<R> GzDecoder<R> {
+ /// Returns the header associated with this stream, if it was valid.
+ pub fn header(&self) -> Option<&GzHeader> {
+ self.inner.header()
+ }
+
+ /// Acquires a reference to the underlying reader.
+ ///
+ /// Note that the decoder may have read past the end of the gzip data.
+ /// To prevent this use [`bufread::GzDecoder`] instead.
+ pub fn get_ref(&self) -> &R {
+ self.inner.get_ref().get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying stream.
+ ///
+ /// Note that mutation of the stream may result in surprising results if
+ /// this decoder continues to be used.
+ ///
+ /// Note that the decoder may have read past the end of the gzip data.
+ /// To prevent this use [`bufread::GzDecoder`] instead.
+ pub fn get_mut(&mut self) -> &mut R {
+ self.inner.get_mut().get_mut()
+ }
+
+ /// Consumes this decoder, returning the underlying reader.
+ ///
+ /// Note that the decoder may have read past the end of the gzip data.
+ /// Subsequent reads will skip those bytes. To prevent this use
+ /// [`bufread::GzDecoder`] instead.
+ pub fn into_inner(self) -> R {
+ self.inner.into_inner().into_inner()
+ }
+}
+
+impl<R: Read> Read for GzDecoder<R> {
+ fn read(&mut self, into: &mut [u8]) -> io::Result<usize> {
+ self.inner.read(into)
+ }
+}
+
+impl<R: Read + Write> Write for GzDecoder<R> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.get_mut().write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.get_mut().flush()
+ }
+}
+
+/// A gzip streaming decoder that decodes a [gzip file] that may have multiple members.
+///
+/// This structure implements a [`Read`] interface. When read from, it reads
+/// compressed data from the underlying [`Read`] and provides the uncompressed
+/// data.
+///
+/// A gzip file consists of a series of *members* concatenated one after another.
+/// MultiGzDecoder decodes all members of a file and returns Ok(0) once the
+/// underlying reader does.
+///
+/// To handle members seperately, see [GzDecoder] or read more
+/// [in the introduction](../index.html#about-multi-member-gzip-files).
+///
+/// [gzip file]: https://www.rfc-editor.org/rfc/rfc1952#page-5
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// # use flate2::Compression;
+/// # use flate2::write::GzEncoder;
+/// use flate2::read::MultiGzDecoder;
+///
+/// # fn main() {
+/// # let mut e = GzEncoder::new(Vec::new(), Compression::default());
+/// # e.write_all(b"Hello World").unwrap();
+/// # let bytes = e.finish().unwrap();
+/// # println!("{}", decode_reader(bytes).unwrap());
+/// # }
+/// #
+/// // Uncompresses a Gz Encoded vector of bytes and returns a string or error
+/// // Here &[u8] implements Read
+///
+/// fn decode_reader(bytes: Vec<u8>) -> io::Result<String> {
+/// let mut gz = MultiGzDecoder::new(&bytes[..]);
+/// let mut s = String::new();
+/// gz.read_to_string(&mut s)?;
+/// Ok(s)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct MultiGzDecoder<R> {
+ inner: bufread::MultiGzDecoder<BufReader<R>>,
+}
+
+impl<R: Read> MultiGzDecoder<R> {
+ /// Creates a new decoder from the given reader, immediately parsing the
+ /// (first) gzip header. If the gzip stream contains multiple members all will
+ /// be decoded.
+ pub fn new(r: R) -> MultiGzDecoder<R> {
+ MultiGzDecoder {
+ inner: bufread::MultiGzDecoder::new(BufReader::new(r)),
+ }
+ }
+}
+
+impl<R> MultiGzDecoder<R> {
+ /// Returns the current header associated with this stream, if it's valid.
+ pub fn header(&self) -> Option<&GzHeader> {
+ self.inner.header()
+ }
+
+ /// Acquires a reference to the underlying reader.
+ pub fn get_ref(&self) -> &R {
+ self.inner.get_ref().get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying stream.
+ ///
+ /// Note that mutation of the stream may result in surprising results if
+ /// this decoder is continued to be used.
+ pub fn get_mut(&mut self) -> &mut R {
+ self.inner.get_mut().get_mut()
+ }
+
+ /// Consumes this decoder, returning the underlying reader.
+ pub fn into_inner(self) -> R {
+ self.inner.into_inner().into_inner()
+ }
+}
+
+impl<R: Read> Read for MultiGzDecoder<R> {
+ fn read(&mut self, into: &mut [u8]) -> io::Result<usize> {
+ self.inner.read(into)
+ }
+}
+
+impl<R: Read + Write> Write for MultiGzDecoder<R> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.get_mut().write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.get_mut().flush()
+ }
+}
+
+#[cfg(test)]
+mod tests {
+ use std::io::{Cursor, ErrorKind, Read, Result, Write};
+
+ use super::GzDecoder;
+
+ //a cursor turning EOF into blocking errors
+ #[derive(Debug)]
+ pub struct BlockingCursor {
+ pub cursor: Cursor<Vec<u8>>,
+ }
+
+ impl BlockingCursor {
+ pub fn new() -> BlockingCursor {
+ BlockingCursor {
+ cursor: Cursor::new(Vec::new()),
+ }
+ }
+
+ pub fn set_position(&mut self, pos: u64) {
+ return self.cursor.set_position(pos);
+ }
+ }
+
+ impl Write for BlockingCursor {
+ fn write(&mut self, buf: &[u8]) -> Result<usize> {
+ return self.cursor.write(buf);
+ }
+ fn flush(&mut self) -> Result<()> {
+ return self.cursor.flush();
+ }
+ }
+
+ impl Read for BlockingCursor {
+ fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
+ //use the cursor, except it turns eof into blocking error
+ let r = self.cursor.read(buf);
+ match r {
+ Err(ref err) => {
+ if err.kind() == ErrorKind::UnexpectedEof {
+ return Err(ErrorKind::WouldBlock.into());
+ }
+ }
+ Ok(0) => {
+ //regular EOF turned into blocking error
+ return Err(ErrorKind::WouldBlock.into());
+ }
+ Ok(_n) => {}
+ }
+ return r;
+ }
+ }
+
+ #[test]
+ fn blocked_partial_header_read() {
+ // this is a reader which receives data afterwards
+ let mut r = BlockingCursor::new();
+ let data = vec![1, 2, 3];
+
+ match r.write_all(&data) {
+ Ok(()) => {}
+ _ => {
+ panic!("Unexpected result for write_all");
+ }
+ }
+ r.set_position(0);
+
+ // this is unused except for the buffering
+ let mut decoder = GzDecoder::new(r);
+ let mut out = Vec::with_capacity(7);
+ match decoder.read(&mut out) {
+ Err(e) => {
+ assert_eq!(e.kind(), ErrorKind::WouldBlock);
+ }
+ _ => {
+ panic!("Unexpected result for decoder.read");
+ }
+ }
+ }
+}
diff --git a/vendor/flate2/src/gz/write.rs b/vendor/flate2/src/gz/write.rs
new file mode 100644
index 0000000..74d6c5a
--- /dev/null
+++ b/vendor/flate2/src/gz/write.rs
@@ -0,0 +1,641 @@
+use std::cmp;
+use std::io;
+use std::io::prelude::*;
+
+use super::{corrupt, GzBuilder, GzHeader, GzHeaderParser};
+use crate::crc::{Crc, CrcWriter};
+use crate::zio;
+use crate::{Compress, Compression, Decompress, Status};
+
+/// A gzip streaming encoder
+///
+/// This structure exposes a [`Write`] interface that will emit compressed data
+/// to the underlying writer `W`.
+///
+/// [`Write`]: https://doc.rust-lang.org/std/io/trait.Write.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use flate2::Compression;
+/// use flate2::write::GzEncoder;
+///
+/// // Vec<u8> implements Write to print the compressed bytes of sample string
+/// # fn main() {
+///
+/// let mut e = GzEncoder::new(Vec::new(), Compression::default());
+/// e.write_all(b"Hello World").unwrap();
+/// println!("{:?}", e.finish().unwrap());
+/// # }
+/// ```
+#[derive(Debug)]
+pub struct GzEncoder<W: Write> {
+ inner: zio::Writer<W, Compress>,
+ crc: Crc,
+ crc_bytes_written: usize,
+ header: Vec<u8>,
+}
+
+pub fn gz_encoder<W: Write>(header: Vec<u8>, w: W, lvl: Compression) -> GzEncoder<W> {
+ GzEncoder {
+ inner: zio::Writer::new(w, Compress::new(lvl, false)),
+ crc: Crc::new(),
+ header,
+ crc_bytes_written: 0,
+ }
+}
+
+impl<W: Write> GzEncoder<W> {
+ /// Creates a new encoder which will use the given compression level.
+ ///
+ /// The encoder is not configured specially for the emitted header. For
+ /// header configuration, see the `GzBuilder` type.
+ ///
+ /// The data written to the returned encoder will be compressed and then
+ /// written to the stream `w`.
+ pub fn new(w: W, level: Compression) -> GzEncoder<W> {
+ GzBuilder::new().write(w, level)
+ }
+
+ /// Acquires a reference to the underlying writer.
+ pub fn get_ref(&self) -> &W {
+ self.inner.get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying writer.
+ ///
+ /// Note that mutation of the writer may result in surprising results if
+ /// this encoder is continued to be used.
+ pub fn get_mut(&mut self) -> &mut W {
+ self.inner.get_mut()
+ }
+
+ /// Attempt to finish this output stream, writing out final chunks of data.
+ ///
+ /// Note that this function can only be used once data has finished being
+ /// written to the output stream. After this function is called then further
+ /// calls to `write` may result in a panic.
+ ///
+ /// # Panics
+ ///
+ /// Attempts to write data to this stream may result in a panic after this
+ /// function is called.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn try_finish(&mut self) -> io::Result<()> {
+ self.write_header()?;
+ self.inner.finish()?;
+
+ while self.crc_bytes_written < 8 {
+ let (sum, amt) = (self.crc.sum(), self.crc.amount());
+ let buf = [
+ (sum >> 0) as u8,
+ (sum >> 8) as u8,
+ (sum >> 16) as u8,
+ (sum >> 24) as u8,
+ (amt >> 0) as u8,
+ (amt >> 8) as u8,
+ (amt >> 16) as u8,
+ (amt >> 24) as u8,
+ ];
+ let inner = self.inner.get_mut();
+ let n = inner.write(&buf[self.crc_bytes_written..])?;
+ self.crc_bytes_written += n;
+ }
+ Ok(())
+ }
+
+ /// Finish encoding this stream, returning the underlying writer once the
+ /// encoding is done.
+ ///
+ /// Note that this function may not be suitable to call in a situation where
+ /// the underlying stream is an asynchronous I/O stream. To finish a stream
+ /// the `try_finish` (or `shutdown`) method should be used instead. To
+ /// re-acquire ownership of a stream it is safe to call this method after
+ /// `try_finish` or `shutdown` has returned `Ok`.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn finish(mut self) -> io::Result<W> {
+ self.try_finish()?;
+ Ok(self.inner.take_inner())
+ }
+
+ fn write_header(&mut self) -> io::Result<()> {
+ while !self.header.is_empty() {
+ let n = self.inner.get_mut().write(&self.header)?;
+ self.header.drain(..n);
+ }
+ Ok(())
+ }
+}
+
+impl<W: Write> Write for GzEncoder<W> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ assert_eq!(self.crc_bytes_written, 0);
+ self.write_header()?;
+ let n = self.inner.write(buf)?;
+ self.crc.update(&buf[..n]);
+ Ok(n)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ assert_eq!(self.crc_bytes_written, 0);
+ self.write_header()?;
+ self.inner.flush()
+ }
+}
+
+impl<R: Read + Write> Read for GzEncoder<R> {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.get_mut().read(buf)
+ }
+}
+
+impl<W: Write> Drop for GzEncoder<W> {
+ fn drop(&mut self) {
+ if self.inner.is_present() {
+ let _ = self.try_finish();
+ }
+ }
+}
+
+/// A decoder for a single member of a [gzip file].
+///
+/// This structure exposes a [`Write`] interface, receiving compressed data and
+/// writing uncompressed data to the underlying writer.
+///
+/// After decoding a single member of the gzip data this writer will return the number of bytes up to
+/// to the end of the gzip member and subsequent writes will return Ok(0) allowing the caller to
+/// handle any data following the gzip member.
+///
+/// To handle gzip files that may have multiple members, see [`MultiGzDecoder`]
+/// or read more
+/// [in the introduction](../index.html#about-multi-member-gzip-files).
+///
+/// [gzip file]: https://www.rfc-editor.org/rfc/rfc1952#page-5
+/// [`Write`]: https://doc.rust-lang.org/std/io/trait.Write.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// use flate2::Compression;
+/// use flate2::write::{GzEncoder, GzDecoder};
+///
+/// # fn main() {
+/// # let mut e = GzEncoder::new(Vec::new(), Compression::default());
+/// # e.write(b"Hello World").unwrap();
+/// # let bytes = e.finish().unwrap();
+/// # assert_eq!("Hello World", decode_writer(bytes).unwrap());
+/// # }
+/// // Uncompresses a gzip encoded vector of bytes and returns a string or error
+/// // Here Vec<u8> implements Write
+/// fn decode_writer(bytes: Vec<u8>) -> io::Result<String> {
+/// let mut writer = Vec::new();
+/// let mut decoder = GzDecoder::new(writer);
+/// decoder.write_all(&bytes[..])?;
+/// writer = decoder.finish()?;
+/// let return_string = String::from_utf8(writer).expect("String parsing error");
+/// Ok(return_string)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct GzDecoder<W: Write> {
+ inner: zio::Writer<CrcWriter<W>, Decompress>,
+ crc_bytes: Vec<u8>,
+ header_parser: GzHeaderParser,
+}
+
+const CRC_BYTES_LEN: usize = 8;
+
+impl<W: Write> GzDecoder<W> {
+ /// Creates a new decoder which will write uncompressed data to the stream.
+ ///
+ /// When this encoder is dropped or unwrapped the final pieces of data will
+ /// be flushed.
+ pub fn new(w: W) -> GzDecoder<W> {
+ GzDecoder {
+ inner: zio::Writer::new(CrcWriter::new(w), Decompress::new(false)),
+ crc_bytes: Vec::with_capacity(CRC_BYTES_LEN),
+ header_parser: GzHeaderParser::new(),
+ }
+ }
+
+ /// Returns the header associated with this stream.
+ pub fn header(&self) -> Option<&GzHeader> {
+ self.header_parser.header()
+ }
+
+ /// Acquires a reference to the underlying writer.
+ pub fn get_ref(&self) -> &W {
+ self.inner.get_ref().get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying writer.
+ ///
+ /// Note that mutating the output/input state of the stream may corrupt this
+ /// object, so care must be taken when using this method.
+ pub fn get_mut(&mut self) -> &mut W {
+ self.inner.get_mut().get_mut()
+ }
+
+ /// Attempt to finish this output stream, writing out final chunks of data.
+ ///
+ /// Note that this function can only be used once data has finished being
+ /// written to the output stream. After this function is called then further
+ /// calls to `write` may result in a panic.
+ ///
+ /// # Panics
+ ///
+ /// Attempts to write data to this stream may result in a panic after this
+ /// function is called.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to finish the stream, returning any
+ /// errors which happen.
+ pub fn try_finish(&mut self) -> io::Result<()> {
+ self.finish_and_check_crc()?;
+ Ok(())
+ }
+
+ /// Consumes this decoder, flushing the output stream.
+ ///
+ /// This will flush the underlying data stream and then return the contained
+ /// writer if the flush succeeded.
+ ///
+ /// Note that this function may not be suitable to call in a situation where
+ /// the underlying stream is an asynchronous I/O stream. To finish a stream
+ /// the `try_finish` (or `shutdown`) method should be used instead. To
+ /// re-acquire ownership of a stream it is safe to call this method after
+ /// `try_finish` or `shutdown` has returned `Ok`.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn finish(mut self) -> io::Result<W> {
+ self.finish_and_check_crc()?;
+ Ok(self.inner.take_inner().into_inner())
+ }
+
+ fn finish_and_check_crc(&mut self) -> io::Result<()> {
+ self.inner.finish()?;
+
+ if self.crc_bytes.len() != 8 {
+ return Err(corrupt());
+ }
+
+ let crc = ((self.crc_bytes[0] as u32) << 0)
+ | ((self.crc_bytes[1] as u32) << 8)
+ | ((self.crc_bytes[2] as u32) << 16)
+ | ((self.crc_bytes[3] as u32) << 24);
+ let amt = ((self.crc_bytes[4] as u32) << 0)
+ | ((self.crc_bytes[5] as u32) << 8)
+ | ((self.crc_bytes[6] as u32) << 16)
+ | ((self.crc_bytes[7] as u32) << 24);
+ if crc != self.inner.get_ref().crc().sum() {
+ return Err(corrupt());
+ }
+ if amt != self.inner.get_ref().crc().amount() {
+ return Err(corrupt());
+ }
+ Ok(())
+ }
+}
+
+impl<W: Write> Write for GzDecoder<W> {
+ fn write(&mut self, mut buf: &[u8]) -> io::Result<usize> {
+ let buflen = buf.len();
+ if self.header().is_none() {
+ match self.header_parser.parse(&mut buf) {
+ Err(err) => {
+ if err.kind() == io::ErrorKind::UnexpectedEof {
+ // all data read but header still not complete
+ Ok(buflen)
+ } else {
+ Err(err)
+ }
+ }
+ Ok(_) => {
+ debug_assert!(self.header().is_some());
+ // buf now contains the unread part of the original buf
+ let n = buflen - buf.len();
+ Ok(n)
+ }
+ }
+ } else {
+ let (n, status) = self.inner.write_with_status(buf)?;
+
+ if status == Status::StreamEnd && n < buf.len() && self.crc_bytes.len() < 8 {
+ let remaining = buf.len() - n;
+ let crc_bytes = cmp::min(remaining, CRC_BYTES_LEN - self.crc_bytes.len());
+ self.crc_bytes.extend(&buf[n..n + crc_bytes]);
+ return Ok(n + crc_bytes);
+ }
+ Ok(n)
+ }
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.inner.flush()
+ }
+}
+
+impl<W: Read + Write> Read for GzDecoder<W> {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.get_mut().get_mut().read(buf)
+ }
+}
+
+/// A gzip streaming decoder that decodes a [gzip file] with multiple members.
+///
+/// This structure exposes a [`Write`] interface that will consume compressed data and
+/// write uncompressed data to the underlying writer.
+///
+/// A gzip file consists of a series of *members* concatenated one after another.
+/// `MultiGzDecoder` decodes all members of a file and writes them to the
+/// underlying writer one after another.
+///
+/// To handle members separately, see [GzDecoder] or read more
+/// [in the introduction](../index.html#about-multi-member-gzip-files).
+///
+/// [gzip file]: https://www.rfc-editor.org/rfc/rfc1952#page-5
+#[derive(Debug)]
+pub struct MultiGzDecoder<W: Write> {
+ inner: GzDecoder<W>,
+}
+
+impl<W: Write> MultiGzDecoder<W> {
+ /// Creates a new decoder which will write uncompressed data to the stream.
+ /// If the gzip stream contains multiple members all will be decoded.
+ pub fn new(w: W) -> MultiGzDecoder<W> {
+ MultiGzDecoder {
+ inner: GzDecoder::new(w),
+ }
+ }
+
+ /// Returns the header associated with the current member.
+ pub fn header(&self) -> Option<&GzHeader> {
+ self.inner.header()
+ }
+
+ /// Acquires a reference to the underlying writer.
+ pub fn get_ref(&self) -> &W {
+ self.inner.get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying writer.
+ ///
+ /// Note that mutating the output/input state of the stream may corrupt this
+ /// object, so care must be taken when using this method.
+ pub fn get_mut(&mut self) -> &mut W {
+ self.inner.get_mut()
+ }
+
+ /// Attempt to finish this output stream, writing out final chunks of data.
+ ///
+ /// Note that this function can only be used once data has finished being
+ /// written to the output stream. After this function is called then further
+ /// calls to `write` may result in a panic.
+ ///
+ /// # Panics
+ ///
+ /// Attempts to write data to this stream may result in a panic after this
+ /// function is called.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to finish the stream, returning any
+ /// errors which happen.
+ pub fn try_finish(&mut self) -> io::Result<()> {
+ self.inner.try_finish()
+ }
+
+ /// Consumes this decoder, flushing the output stream.
+ ///
+ /// This will flush the underlying data stream and then return the contained
+ /// writer if the flush succeeded.
+ ///
+ /// Note that this function may not be suitable to call in a situation where
+ /// the underlying stream is an asynchronous I/O stream. To finish a stream
+ /// the `try_finish` (or `shutdown`) method should be used instead. To
+ /// re-acquire ownership of a stream it is safe to call this method after
+ /// `try_finish` or `shutdown` has returned `Ok`.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn finish(self) -> io::Result<W> {
+ self.inner.finish()
+ }
+}
+
+impl<W: Write> Write for MultiGzDecoder<W> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ if buf.is_empty() {
+ Ok(0)
+ } else {
+ match self.inner.write(buf) {
+ Ok(0) => {
+ // When the GzDecoder indicates that it has finished
+ // create a new GzDecoder to handle additional data.
+ self.inner.try_finish()?;
+ let w = self.inner.inner.take_inner().into_inner();
+ self.inner = GzDecoder::new(w);
+ self.inner.write(buf)
+ }
+ res => res,
+ }
+ }
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.inner.flush()
+ }
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+
+ const STR: &str = "Hello World Hello World Hello World Hello World Hello World \
+ Hello World Hello World Hello World Hello World Hello World \
+ Hello World Hello World Hello World Hello World Hello World \
+ Hello World Hello World Hello World Hello World Hello World \
+ Hello World Hello World Hello World Hello World Hello World";
+
+ #[test]
+ fn decode_writer_one_chunk() {
+ let mut e = GzEncoder::new(Vec::new(), Compression::default());
+ e.write(STR.as_ref()).unwrap();
+ let bytes = e.finish().unwrap();
+
+ let mut writer = Vec::new();
+ let mut decoder = GzDecoder::new(writer);
+ let n = decoder.write(&bytes[..]).unwrap();
+ decoder.write(&bytes[n..]).unwrap();
+ decoder.try_finish().unwrap();
+ writer = decoder.finish().unwrap();
+ let return_string = String::from_utf8(writer).expect("String parsing error");
+ assert_eq!(return_string, STR);
+ }
+
+ #[test]
+ fn decode_writer_partial_header() {
+ let mut e = GzEncoder::new(Vec::new(), Compression::default());
+ e.write(STR.as_ref()).unwrap();
+ let bytes = e.finish().unwrap();
+
+ let mut writer = Vec::new();
+ let mut decoder = GzDecoder::new(writer);
+ assert_eq!(decoder.write(&bytes[..5]).unwrap(), 5);
+ let n = decoder.write(&bytes[5..]).unwrap();
+ if n < bytes.len() - 5 {
+ decoder.write(&bytes[n + 5..]).unwrap();
+ }
+ writer = decoder.finish().unwrap();
+ let return_string = String::from_utf8(writer).expect("String parsing error");
+ assert_eq!(return_string, STR);
+ }
+
+ #[test]
+ fn decode_writer_partial_header_filename() {
+ let filename = "test.txt";
+ let mut e = GzBuilder::new()
+ .filename(filename)
+ .read(STR.as_bytes(), Compression::default());
+ let mut bytes = Vec::new();
+ e.read_to_end(&mut bytes).unwrap();
+
+ let mut writer = Vec::new();
+ let mut decoder = GzDecoder::new(writer);
+ assert_eq!(decoder.write(&bytes[..12]).unwrap(), 12);
+ let n = decoder.write(&bytes[12..]).unwrap();
+ if n < bytes.len() - 12 {
+ decoder.write(&bytes[n + 12..]).unwrap();
+ }
+ assert_eq!(
+ decoder.header().unwrap().filename().unwrap(),
+ filename.as_bytes()
+ );
+ writer = decoder.finish().unwrap();
+ let return_string = String::from_utf8(writer).expect("String parsing error");
+ assert_eq!(return_string, STR);
+ }
+
+ #[test]
+ fn decode_writer_partial_header_comment() {
+ let comment = "test comment";
+ let mut e = GzBuilder::new()
+ .comment(comment)
+ .read(STR.as_bytes(), Compression::default());
+ let mut bytes = Vec::new();
+ e.read_to_end(&mut bytes).unwrap();
+
+ let mut writer = Vec::new();
+ let mut decoder = GzDecoder::new(writer);
+ assert_eq!(decoder.write(&bytes[..12]).unwrap(), 12);
+ let n = decoder.write(&bytes[12..]).unwrap();
+ if n < bytes.len() - 12 {
+ decoder.write(&bytes[n + 12..]).unwrap();
+ }
+ assert_eq!(
+ decoder.header().unwrap().comment().unwrap(),
+ comment.as_bytes()
+ );
+ writer = decoder.finish().unwrap();
+ let return_string = String::from_utf8(writer).expect("String parsing error");
+ assert_eq!(return_string, STR);
+ }
+
+ #[test]
+ fn decode_writer_exact_header() {
+ let mut e = GzEncoder::new(Vec::new(), Compression::default());
+ e.write(STR.as_ref()).unwrap();
+ let bytes = e.finish().unwrap();
+
+ let mut writer = Vec::new();
+ let mut decoder = GzDecoder::new(writer);
+ assert_eq!(decoder.write(&bytes[..10]).unwrap(), 10);
+ decoder.write(&bytes[10..]).unwrap();
+ writer = decoder.finish().unwrap();
+ let return_string = String::from_utf8(writer).expect("String parsing error");
+ assert_eq!(return_string, STR);
+ }
+
+ #[test]
+ fn decode_writer_partial_crc() {
+ let mut e = GzEncoder::new(Vec::new(), Compression::default());
+ e.write(STR.as_ref()).unwrap();
+ let bytes = e.finish().unwrap();
+
+ let mut writer = Vec::new();
+ let mut decoder = GzDecoder::new(writer);
+ let l = bytes.len() - 5;
+ let n = decoder.write(&bytes[..l]).unwrap();
+ decoder.write(&bytes[n..]).unwrap();
+ writer = decoder.finish().unwrap();
+ let return_string = String::from_utf8(writer).expect("String parsing error");
+ assert_eq!(return_string, STR);
+ }
+
+ // Two or more gzip files concatenated form a multi-member gzip file. MultiGzDecoder will
+ // concatenate the decoded contents of all members.
+ #[test]
+ fn decode_multi_writer() {
+ let mut e = GzEncoder::new(Vec::new(), Compression::default());
+ e.write(STR.as_ref()).unwrap();
+ let bytes = e.finish().unwrap().repeat(2);
+
+ let mut writer = Vec::new();
+ let mut decoder = MultiGzDecoder::new(writer);
+ let mut count = 0;
+ while count < bytes.len() {
+ let n = decoder.write(&bytes[count..]).unwrap();
+ assert!(n != 0);
+ count += n;
+ }
+ writer = decoder.finish().unwrap();
+ let return_string = String::from_utf8(writer).expect("String parsing error");
+ let expected = STR.repeat(2);
+ assert_eq!(return_string, expected);
+ }
+
+ // GzDecoder consumes one gzip member and then returns 0 for subsequent writes, allowing any
+ // additional data to be consumed by the caller.
+ #[test]
+ fn decode_extra_data() {
+ let compressed = {
+ let mut e = GzEncoder::new(Vec::new(), Compression::default());
+ e.write(STR.as_ref()).unwrap();
+ let mut b = e.finish().unwrap();
+ b.push(b'x');
+ b
+ };
+
+ let mut writer = Vec::new();
+ let mut decoder = GzDecoder::new(writer);
+ let mut consumed_bytes = 0;
+ loop {
+ let n = decoder.write(&compressed[consumed_bytes..]).unwrap();
+ if n == 0 {
+ break;
+ }
+ consumed_bytes += n;
+ }
+ writer = decoder.finish().unwrap();
+ let actual = String::from_utf8(writer).expect("String parsing error");
+ assert_eq!(actual, STR);
+ assert_eq!(&compressed[consumed_bytes..], b"x");
+ }
+}
diff --git a/vendor/flate2/src/lib.rs b/vendor/flate2/src/lib.rs
new file mode 100644
index 0000000..8c000b0
--- /dev/null
+++ b/vendor/flate2/src/lib.rs
@@ -0,0 +1,234 @@
+//! A DEFLATE-based stream compression/decompression library
+//!
+//! This library provides support for compression and decompression of
+//! DEFLATE-based streams:
+//!
+//! * the DEFLATE format itself
+//! * the zlib format
+//! * gzip
+//!
+//! These three formats are all closely related and largely only differ in their
+//! headers/footers. This crate has three types in each submodule for dealing
+//! with these three formats.
+//!
+//! # Implementation
+//!
+//! In addition to supporting three formats, this crate supports several different
+//! backends, controlled through this crate's features:
+//!
+//! * `default`, or `rust_backend` - this implementation uses the `miniz_oxide`
+//! crate which is a port of `miniz.c` (below) to Rust. This feature does not
+//! require a C compiler and only requires Rust code.
+//!
+//! * `zlib` - this feature will enable linking against the `libz` library, typically found on most
+//! Linux systems by default. If the library isn't found to already be on the system it will be
+//! compiled from source (this is a C library).
+//!
+//! There's various tradeoffs associated with each implementation, but in general you probably
+//! won't have to tweak the defaults. The default choice is selected to avoid the need for a C
+//! compiler at build time. `zlib-ng-compat` is useful if you're using zlib for compatibility but
+//! want performance via zlib-ng's zlib-compat mode. `zlib` is useful if something else in your
+//! dependencies links the original zlib so you cannot use zlib-ng-compat. The compression ratios
+//! and performance of each of these feature should be roughly comparable, but you'll likely want
+//! to run your own tests if you're curious about the performance.
+//!
+//! # Organization
+//!
+//! This crate consists mainly of three modules, [`read`], [`write`], and
+//! [`bufread`]. Each module contains a number of types used to encode and
+//! decode various streams of data.
+//!
+//! All types in the [`write`] module work on instances of [`Write`][write],
+//! whereas all types in the [`read`] module work on instances of
+//! [`Read`][read] and [`bufread`] works with [`BufRead`][bufread]. If you
+//! are decoding directly from a `&[u8]`, use the [`bufread`] types.
+//!
+//! ```
+//! use flate2::write::GzEncoder;
+//! use flate2::Compression;
+//! use std::io;
+//! use std::io::prelude::*;
+//!
+//! # fn main() { let _ = run(); }
+//! # fn run() -> io::Result<()> {
+//! let mut encoder = GzEncoder::new(Vec::new(), Compression::default());
+//! encoder.write_all(b"Example")?;
+//! # Ok(())
+//! # }
+//! ```
+//!
+//!
+//! Other various types are provided at the top-level of the crate for
+//! management and dealing with encoders/decoders. Also note that types which
+//! operate over a specific trait often implement the mirroring trait as well.
+//! For example a `flate2::read::DeflateDecoder<T>` *also* implements the
+//! `Write` trait if `T: Write`. That is, the "dual trait" is forwarded directly
+//! to the underlying object if available.
+//!
+//! # About multi-member Gzip files
+//!
+//! While most `gzip` files one encounters will have a single *member* that can be read
+//! with the [`GzDecoder`], there may be some files which have multiple members.
+//!
+//! A [`GzDecoder`] will only read the first member of gzip data, which may unexpectedly
+//! provide partial results when a multi-member gzip file is encountered. `GzDecoder` is appropriate
+//! for data that is designed to be read as single members from a multi-member file. `bufread::GzDecoder`
+//! and `write::GzDecoder` also allow non-gzip data following gzip data to be handled.
+//!
+//! The [`MultiGzDecoder`] on the other hand will decode all members of a `gzip` file
+//! into one consecutive stream of bytes, which hides the underlying *members* entirely.
+//! If a file contains contains non-gzip data after the gzip data, MultiGzDecoder will
+//! emit an error after decoding the gzip data. This behavior matches the `gzip`,
+//! `gunzip`, and `zcat` command line tools.
+//!
+//! [`read`]: read/index.html
+//! [`bufread`]: bufread/index.html
+//! [`write`]: write/index.html
+//! [read]: https://doc.rust-lang.org/std/io/trait.Read.html
+//! [write]: https://doc.rust-lang.org/std/io/trait.Write.html
+//! [bufread]: https://doc.rust-lang.org/std/io/trait.BufRead.html
+//! [`GzDecoder`]: read/struct.GzDecoder.html
+//! [`MultiGzDecoder`]: read/struct.MultiGzDecoder.html
+#![doc(html_root_url = "https://docs.rs/flate2/0.2")]
+#![deny(missing_docs)]
+#![deny(missing_debug_implementations)]
+#![allow(trivial_numeric_casts)]
+#![cfg_attr(test, deny(warnings))]
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+
+#[cfg(not(feature = "any_impl",))]
+compile_error!("You need to choose a zlib backend");
+
+pub use crate::crc::{Crc, CrcReader, CrcWriter};
+pub use crate::gz::GzBuilder;
+pub use crate::gz::GzHeader;
+pub use crate::mem::{Compress, CompressError, Decompress, DecompressError, Status};
+pub use crate::mem::{FlushCompress, FlushDecompress};
+
+mod bufreader;
+mod crc;
+mod deflate;
+mod ffi;
+mod gz;
+mod mem;
+mod zio;
+mod zlib;
+
+/// Types which operate over [`Read`] streams, both encoders and decoders for
+/// various formats.
+///
+/// Note that the `read` decoder types may read past the end of the compressed
+/// data while decoding. If the caller requires subsequent reads to start
+/// immediately following the compressed data wrap the `Read` type in a
+/// [`BufReader`] and use the `BufReader` with the equivalent decoder from the
+/// `bufread` module and also for the subsequent reads.
+///
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+/// [`BufReader`]: https://doc.rust-lang.org/std/io/struct.BufReader.html
+pub mod read {
+ pub use crate::deflate::read::DeflateDecoder;
+ pub use crate::deflate::read::DeflateEncoder;
+ pub use crate::gz::read::GzDecoder;
+ pub use crate::gz::read::GzEncoder;
+ pub use crate::gz::read::MultiGzDecoder;
+ pub use crate::zlib::read::ZlibDecoder;
+ pub use crate::zlib::read::ZlibEncoder;
+}
+
+/// Types which operate over [`Write`] streams, both encoders and decoders for
+/// various formats.
+///
+/// [`Write`]: https://doc.rust-lang.org/std/io/trait.Write.html
+pub mod write {
+ pub use crate::deflate::write::DeflateDecoder;
+ pub use crate::deflate::write::DeflateEncoder;
+ pub use crate::gz::write::GzDecoder;
+ pub use crate::gz::write::GzEncoder;
+ pub use crate::gz::write::MultiGzDecoder;
+ pub use crate::zlib::write::ZlibDecoder;
+ pub use crate::zlib::write::ZlibEncoder;
+}
+
+/// Types which operate over [`BufRead`] streams, both encoders and decoders for
+/// various formats.
+///
+/// [`BufRead`]: https://doc.rust-lang.org/std/io/trait.BufRead.html
+pub mod bufread {
+ pub use crate::deflate::bufread::DeflateDecoder;
+ pub use crate::deflate::bufread::DeflateEncoder;
+ pub use crate::gz::bufread::GzDecoder;
+ pub use crate::gz::bufread::GzEncoder;
+ pub use crate::gz::bufread::MultiGzDecoder;
+ pub use crate::zlib::bufread::ZlibDecoder;
+ pub use crate::zlib::bufread::ZlibEncoder;
+}
+
+fn _assert_send_sync() {
+ fn _assert_send_sync<T: Send + Sync>() {}
+
+ _assert_send_sync::<read::DeflateEncoder<&[u8]>>();
+ _assert_send_sync::<read::DeflateDecoder<&[u8]>>();
+ _assert_send_sync::<read::ZlibEncoder<&[u8]>>();
+ _assert_send_sync::<read::ZlibDecoder<&[u8]>>();
+ _assert_send_sync::<read::GzEncoder<&[u8]>>();
+ _assert_send_sync::<read::GzDecoder<&[u8]>>();
+ _assert_send_sync::<read::MultiGzDecoder<&[u8]>>();
+ _assert_send_sync::<write::DeflateEncoder<Vec<u8>>>();
+ _assert_send_sync::<write::DeflateDecoder<Vec<u8>>>();
+ _assert_send_sync::<write::ZlibEncoder<Vec<u8>>>();
+ _assert_send_sync::<write::ZlibDecoder<Vec<u8>>>();
+ _assert_send_sync::<write::GzEncoder<Vec<u8>>>();
+ _assert_send_sync::<write::GzDecoder<Vec<u8>>>();
+}
+
+/// When compressing data, the compression level can be specified by a value in
+/// this struct.
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+pub struct Compression(u32);
+
+impl Compression {
+ /// Creates a new description of the compression level with an explicitly
+ /// specified integer.
+ ///
+ /// The integer here is typically on a scale of 0-9 where 0 means "no
+ /// compression" and 9 means "take as long as you'd like".
+ pub const fn new(level: u32) -> Compression {
+ Compression(level)
+ }
+
+ /// No compression is to be performed, this may actually inflate data
+ /// slightly when encoding.
+ pub const fn none() -> Compression {
+ Compression(0)
+ }
+
+ /// Optimize for the best speed of encoding.
+ pub const fn fast() -> Compression {
+ Compression(1)
+ }
+
+ /// Optimize for the size of data being encoded.
+ pub const fn best() -> Compression {
+ Compression(9)
+ }
+
+ /// Returns an integer representing the compression level, typically on a
+ /// scale of 0-9
+ pub fn level(&self) -> u32 {
+ self.0
+ }
+}
+
+impl Default for Compression {
+ fn default() -> Compression {
+ Compression(6)
+ }
+}
+
+#[cfg(test)]
+fn random_bytes() -> impl Iterator<Item = u8> {
+ use rand::Rng;
+ use std::iter;
+
+ iter::repeat(()).map(|_| rand::thread_rng().gen())
+}
diff --git a/vendor/flate2/src/mem.rs b/vendor/flate2/src/mem.rs
new file mode 100644
index 0000000..d4a5091
--- /dev/null
+++ 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"));
+ }
+}
diff --git a/vendor/flate2/src/zio.rs b/vendor/flate2/src/zio.rs
new file mode 100644
index 0000000..ea25922
--- /dev/null
+++ b/vendor/flate2/src/zio.rs
@@ -0,0 +1,286 @@
+use std::io;
+use std::io::prelude::*;
+use std::mem;
+
+use crate::{Compress, Decompress, DecompressError, FlushCompress, FlushDecompress, Status};
+
+#[derive(Debug)]
+pub struct Writer<W: Write, D: Ops> {
+ obj: Option<W>,
+ pub data: D,
+ buf: Vec<u8>,
+}
+
+pub trait Ops {
+ type Flush: Flush;
+ fn total_in(&self) -> u64;
+ fn total_out(&self) -> u64;
+ fn run(
+ &mut self,
+ input: &[u8],
+ output: &mut [u8],
+ flush: Self::Flush,
+ ) -> Result<Status, DecompressError>;
+ fn run_vec(
+ &mut self,
+ input: &[u8],
+ output: &mut Vec<u8>,
+ flush: Self::Flush,
+ ) -> Result<Status, DecompressError>;
+}
+
+impl Ops for Compress {
+ type Flush = FlushCompress;
+ fn total_in(&self) -> u64 {
+ self.total_in()
+ }
+ fn total_out(&self) -> u64 {
+ self.total_out()
+ }
+ fn run(
+ &mut self,
+ input: &[u8],
+ output: &mut [u8],
+ flush: FlushCompress,
+ ) -> Result<Status, DecompressError> {
+ Ok(self.compress(input, output, flush).unwrap())
+ }
+ fn run_vec(
+ &mut self,
+ input: &[u8],
+ output: &mut Vec<u8>,
+ flush: FlushCompress,
+ ) -> Result<Status, DecompressError> {
+ Ok(self.compress_vec(input, output, flush).unwrap())
+ }
+}
+
+impl Ops for Decompress {
+ type Flush = FlushDecompress;
+ fn total_in(&self) -> u64 {
+ self.total_in()
+ }
+ fn total_out(&self) -> u64 {
+ self.total_out()
+ }
+ fn run(
+ &mut self,
+ input: &[u8],
+ output: &mut [u8],
+ flush: FlushDecompress,
+ ) -> Result<Status, DecompressError> {
+ self.decompress(input, output, flush)
+ }
+ fn run_vec(
+ &mut self,
+ input: &[u8],
+ output: &mut Vec<u8>,
+ flush: FlushDecompress,
+ ) -> Result<Status, DecompressError> {
+ self.decompress_vec(input, output, flush)
+ }
+}
+
+pub trait Flush {
+ fn none() -> Self;
+ fn sync() -> Self;
+ fn finish() -> Self;
+}
+
+impl Flush for FlushCompress {
+ fn none() -> Self {
+ FlushCompress::None
+ }
+
+ fn sync() -> Self {
+ FlushCompress::Sync
+ }
+
+ fn finish() -> Self {
+ FlushCompress::Finish
+ }
+}
+
+impl Flush for FlushDecompress {
+ fn none() -> Self {
+ FlushDecompress::None
+ }
+
+ fn sync() -> Self {
+ FlushDecompress::Sync
+ }
+
+ fn finish() -> Self {
+ FlushDecompress::Finish
+ }
+}
+
+pub fn read<R, D>(obj: &mut R, data: &mut D, dst: &mut [u8]) -> io::Result<usize>
+where
+ R: BufRead,
+ D: Ops,
+{
+ loop {
+ let (read, consumed, ret, eof);
+ {
+ let input = obj.fill_buf()?;
+ eof = input.is_empty();
+ let before_out = data.total_out();
+ let before_in = data.total_in();
+ let flush = if eof {
+ D::Flush::finish()
+ } else {
+ D::Flush::none()
+ };
+ ret = data.run(input, dst, flush);
+ read = (data.total_out() - before_out) as usize;
+ consumed = (data.total_in() - before_in) as usize;
+ }
+ obj.consume(consumed);
+
+ match ret {
+ // If we haven't ready any data and we haven't hit EOF yet,
+ // then we need to keep asking for more data because if we
+ // return that 0 bytes of data have been read then it will
+ // be interpreted as EOF.
+ Ok(Status::Ok | Status::BufError) if read == 0 && !eof && !dst.is_empty() => continue,
+ Ok(Status::Ok | Status::BufError | Status::StreamEnd) => return Ok(read),
+
+ Err(..) => {
+ return Err(io::Error::new(
+ io::ErrorKind::InvalidInput,
+ "corrupt deflate stream",
+ ))
+ }
+ }
+ }
+}
+
+impl<W: Write, D: Ops> Writer<W, D> {
+ pub fn new(w: W, d: D) -> Writer<W, D> {
+ Writer {
+ obj: Some(w),
+ data: d,
+ buf: Vec::with_capacity(32 * 1024),
+ }
+ }
+
+ pub fn finish(&mut self) -> io::Result<()> {
+ loop {
+ self.dump()?;
+
+ let before = self.data.total_out();
+ self.data.run_vec(&[], &mut self.buf, D::Flush::finish())?;
+ if before == self.data.total_out() {
+ return Ok(());
+ }
+ }
+ }
+
+ pub fn replace(&mut self, w: W) -> W {
+ self.buf.truncate(0);
+ mem::replace(self.get_mut(), w)
+ }
+
+ pub fn get_ref(&self) -> &W {
+ self.obj.as_ref().unwrap()
+ }
+
+ pub fn get_mut(&mut self) -> &mut W {
+ self.obj.as_mut().unwrap()
+ }
+
+ // Note that this should only be called if the outer object is just about
+ // to be consumed!
+ //
+ // (e.g. an implementation of `into_inner`)
+ pub fn take_inner(&mut self) -> W {
+ self.obj.take().unwrap()
+ }
+
+ pub fn is_present(&self) -> bool {
+ self.obj.is_some()
+ }
+
+ // Returns total written bytes and status of underlying codec
+ pub(crate) fn write_with_status(&mut self, buf: &[u8]) -> io::Result<(usize, Status)> {
+ // miniz isn't guaranteed to actually write any of the buffer provided,
+ // it may be in a flushing mode where it's just giving us data before
+ // we're actually giving it any data. We don't want to spuriously return
+ // `Ok(0)` when possible as it will cause calls to write_all() to fail.
+ // As a result we execute this in a loop to ensure that we try our
+ // darndest to write the data.
+ loop {
+ self.dump()?;
+
+ let before_in = self.data.total_in();
+ let ret = self.data.run_vec(buf, &mut self.buf, D::Flush::none());
+ let written = (self.data.total_in() - before_in) as usize;
+ let is_stream_end = matches!(ret, Ok(Status::StreamEnd));
+
+ if !buf.is_empty() && written == 0 && ret.is_ok() && !is_stream_end {
+ continue;
+ }
+ return match ret {
+ Ok(st) => match st {
+ Status::Ok | Status::BufError | Status::StreamEnd => Ok((written, st)),
+ },
+ Err(..) => Err(io::Error::new(
+ io::ErrorKind::InvalidInput,
+ "corrupt deflate stream",
+ )),
+ };
+ }
+ }
+
+ fn dump(&mut self) -> io::Result<()> {
+ // TODO: should manage this buffer not with `drain` but probably more of
+ // a deque-like strategy.
+ while !self.buf.is_empty() {
+ let n = self.obj.as_mut().unwrap().write(&self.buf)?;
+ if n == 0 {
+ return Err(io::ErrorKind::WriteZero.into());
+ }
+ self.buf.drain(..n);
+ }
+ Ok(())
+ }
+}
+
+impl<W: Write, D: Ops> Write for Writer<W, D> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.write_with_status(buf).map(|res| res.0)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.data
+ .run_vec(&[], &mut self.buf, D::Flush::sync())
+ .unwrap();
+
+ // Unfortunately miniz doesn't actually tell us when we're done with
+ // pulling out all the data from the internal stream. To remedy this we
+ // have to continually ask the stream for more memory until it doesn't
+ // give us a chunk of memory the same size as our own internal buffer,
+ // at which point we assume it's reached the end.
+ loop {
+ self.dump()?;
+ let before = self.data.total_out();
+ self.data
+ .run_vec(&[], &mut self.buf, D::Flush::none())
+ .unwrap();
+ if before == self.data.total_out() {
+ break;
+ }
+ }
+
+ self.obj.as_mut().unwrap().flush()
+ }
+}
+
+impl<W: Write, D: Ops> Drop for Writer<W, D> {
+ fn drop(&mut self) {
+ if self.obj.is_some() {
+ let _ = self.finish();
+ }
+ }
+}
diff --git a/vendor/flate2/src/zlib/bufread.rs b/vendor/flate2/src/zlib/bufread.rs
new file mode 100644
index 0000000..85bbd38
--- /dev/null
+++ b/vendor/flate2/src/zlib/bufread.rs
@@ -0,0 +1,253 @@
+use std::io;
+use std::io::prelude::*;
+use std::mem;
+
+use crate::zio;
+use crate::{Compress, Decompress};
+
+/// A ZLIB encoder, or compressor.
+///
+/// This structure implements a [`Read`] interface. When read from, it reads
+/// uncompressed data from the underlying [`BufRead`] and provides the compressed data.
+///
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+/// [`BufRead`]: https://doc.rust-lang.org/std/io/trait.BufRead.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use flate2::Compression;
+/// use flate2::bufread::ZlibEncoder;
+/// use std::fs::File;
+/// use std::io::BufReader;
+///
+/// // Use a buffered file to compress contents into a Vec<u8>
+///
+/// # fn open_hello_world() -> std::io::Result<Vec<u8>> {
+/// let f = File::open("examples/hello_world.txt")?;
+/// let b = BufReader::new(f);
+/// let mut z = ZlibEncoder::new(b, Compression::fast());
+/// let mut buffer = Vec::new();
+/// z.read_to_end(&mut buffer)?;
+/// # Ok(buffer)
+/// # }
+/// ```
+#[derive(Debug)]
+pub struct ZlibEncoder<R> {
+ obj: R,
+ data: Compress,
+}
+
+impl<R: BufRead> ZlibEncoder<R> {
+ /// Creates a new encoder which will read uncompressed data from the given
+ /// stream and emit the compressed stream.
+ pub fn new(r: R, level: crate::Compression) -> ZlibEncoder<R> {
+ ZlibEncoder {
+ obj: r,
+ data: Compress::new(level, true),
+ }
+ }
+
+ /// Creates a new encoder with the given `compression` settings which will
+ /// read uncompressed data from the given stream `r` and emit the compressed stream.
+ pub fn new_with_compress(r: R, compression: Compress) -> ZlibEncoder<R> {
+ ZlibEncoder {
+ obj: r,
+ data: compression,
+ }
+ }
+}
+
+pub fn reset_encoder_data<R>(zlib: &mut ZlibEncoder<R>) {
+ zlib.data.reset()
+}
+
+impl<R> ZlibEncoder<R> {
+ /// Resets the state of this encoder entirely, swapping out the input
+ /// stream for another.
+ ///
+ /// This function will reset the internal state of this encoder and replace
+ /// the input stream with the one provided, returning the previous input
+ /// stream. Future data read from this encoder will be the compressed
+ /// version of `r`'s data.
+ pub fn reset(&mut self, r: R) -> R {
+ reset_encoder_data(self);
+ mem::replace(&mut self.obj, r)
+ }
+
+ /// Acquires a reference to the underlying reader
+ pub fn get_ref(&self) -> &R {
+ &self.obj
+ }
+
+ /// Acquires a mutable reference to the underlying stream
+ ///
+ /// Note that mutation of the stream may result in surprising results if
+ /// this encoder is continued to be used.
+ pub fn get_mut(&mut self) -> &mut R {
+ &mut self.obj
+ }
+
+ /// Consumes this encoder, returning the underlying reader.
+ pub fn into_inner(self) -> R {
+ self.obj
+ }
+
+ /// Returns the number of bytes that have been read into this compressor.
+ ///
+ /// Note that not all bytes read from the underlying object may be accounted
+ /// for, there may still be some active buffering.
+ pub fn total_in(&self) -> u64 {
+ self.data.total_in()
+ }
+
+ /// Returns the number of bytes that the compressor has produced.
+ ///
+ /// Note that not all bytes may have been read yet, some may still be
+ /// buffered.
+ pub fn total_out(&self) -> u64 {
+ self.data.total_out()
+ }
+}
+
+impl<R: BufRead> Read for ZlibEncoder<R> {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ zio::read(&mut self.obj, &mut self.data, buf)
+ }
+}
+
+impl<R: BufRead + Write> Write for ZlibEncoder<R> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.get_mut().write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.get_mut().flush()
+ }
+}
+
+/// A ZLIB decoder, or decompressor.
+///
+/// This structure implements a [`Read`] interface. When read from, it reads
+/// compressed data from the underlying [`BufRead`] and provides the uncompressed data.
+///
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+/// [`BufRead`]: https://doc.rust-lang.org/std/io/trait.BufRead.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// # use flate2::Compression;
+/// # use flate2::write::ZlibEncoder;
+/// use flate2::bufread::ZlibDecoder;
+///
+/// # fn main() {
+/// # let mut e = ZlibEncoder::new(Vec::new(), Compression::default());
+/// # e.write_all(b"Hello World").unwrap();
+/// # let bytes = e.finish().unwrap();
+/// # println!("{}", decode_bufreader(bytes).unwrap());
+/// # }
+/// #
+/// // Uncompresses a Zlib Encoded vector of bytes and returns a string or error
+/// // Here &[u8] implements BufRead
+///
+/// fn decode_bufreader(bytes: Vec<u8>) -> io::Result<String> {
+/// let mut z = ZlibDecoder::new(&bytes[..]);
+/// let mut s = String::new();
+/// z.read_to_string(&mut s)?;
+/// Ok(s)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct ZlibDecoder<R> {
+ obj: R,
+ data: Decompress,
+}
+
+impl<R: BufRead> ZlibDecoder<R> {
+ /// Creates a new decoder which will decompress data read from the given
+ /// stream.
+ pub fn new(r: R) -> ZlibDecoder<R> {
+ ZlibDecoder {
+ obj: r,
+ data: Decompress::new(true),
+ }
+ }
+
+ /// Creates a new decoder which will decompress data read from the given
+ /// stream, using the given `decompression` settings.
+ pub fn new_with_decompress(r: R, decompression: Decompress) -> ZlibDecoder<R> {
+ ZlibDecoder {
+ obj: r,
+ data: decompression,
+ }
+ }
+}
+
+pub fn reset_decoder_data<R>(zlib: &mut ZlibDecoder<R>) {
+ zlib.data = Decompress::new(true);
+}
+
+impl<R> ZlibDecoder<R> {
+ /// Resets the state of this decoder entirely, swapping out the input
+ /// stream for another.
+ ///
+ /// This will reset the internal state of this decoder and replace the
+ /// input stream with the one provided, returning the previous input
+ /// stream. Future data read from this decoder will be the decompressed
+ /// version of `r`'s data.
+ pub fn reset(&mut self, r: R) -> R {
+ reset_decoder_data(self);
+ mem::replace(&mut self.obj, r)
+ }
+
+ /// Acquires a reference to the underlying stream
+ pub fn get_ref(&self) -> &R {
+ &self.obj
+ }
+
+ /// Acquires a mutable reference to the underlying stream
+ ///
+ /// Note that mutation of the stream may result in surprising results if
+ /// this decoder is continued to be used.
+ pub fn get_mut(&mut self) -> &mut R {
+ &mut self.obj
+ }
+
+ /// Consumes this decoder, returning the underlying reader.
+ pub fn into_inner(self) -> R {
+ self.obj
+ }
+
+ /// Returns the number of bytes that the decompressor has consumed.
+ ///
+ /// Note that this will likely be smaller than what the decompressor
+ /// actually read from the underlying stream due to buffering.
+ pub fn total_in(&self) -> u64 {
+ self.data.total_in()
+ }
+
+ /// Returns the number of bytes that the decompressor has produced.
+ pub fn total_out(&self) -> u64 {
+ self.data.total_out()
+ }
+}
+
+impl<R: BufRead> Read for ZlibDecoder<R> {
+ fn read(&mut self, into: &mut [u8]) -> io::Result<usize> {
+ zio::read(&mut self.obj, &mut self.data, into)
+ }
+}
+
+impl<R: BufRead + Write> Write for ZlibDecoder<R> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.get_mut().write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.get_mut().flush()
+ }
+}
diff --git a/vendor/flate2/src/zlib/mod.rs b/vendor/flate2/src/zlib/mod.rs
new file mode 100644
index 0000000..1a293ba
--- /dev/null
+++ b/vendor/flate2/src/zlib/mod.rs
@@ -0,0 +1,159 @@
+pub mod bufread;
+pub mod read;
+pub mod write;
+
+#[cfg(test)]
+mod tests {
+ use std::io;
+ use std::io::prelude::*;
+
+ use rand::{thread_rng, Rng};
+
+ use crate::zlib::{read, write};
+ use crate::Compression;
+
+ #[test]
+ fn roundtrip() {
+ let mut real = Vec::new();
+ let mut w = write::ZlibEncoder::new(Vec::new(), Compression::default());
+ let v = crate::random_bytes().take(1024).collect::<Vec<_>>();
+ for _ in 0..200 {
+ let to_write = &v[..thread_rng().gen_range(0..v.len())];
+ real.extend(to_write.iter().copied());
+ w.write_all(to_write).unwrap();
+ }
+ let result = w.finish().unwrap();
+ let mut r = read::ZlibDecoder::new(&result[..]);
+ let mut ret = Vec::new();
+ r.read_to_end(&mut ret).unwrap();
+ assert_eq!(ret, real);
+ }
+
+ #[test]
+ fn drop_writes() {
+ let mut data = Vec::new();
+ write::ZlibEncoder::new(&mut data, Compression::default())
+ .write_all(b"foo")
+ .unwrap();
+ let mut r = read::ZlibDecoder::new(&data[..]);
+ let mut ret = Vec::new();
+ r.read_to_end(&mut ret).unwrap();
+ assert_eq!(ret, b"foo");
+ }
+
+ #[test]
+ fn total_in() {
+ let mut real = Vec::new();
+ let mut w = write::ZlibEncoder::new(Vec::new(), Compression::default());
+ let v = crate::random_bytes().take(1024).collect::<Vec<_>>();
+ for _ in 0..200 {
+ let to_write = &v[..thread_rng().gen_range(0..v.len())];
+ real.extend(to_write.iter().copied());
+ w.write_all(to_write).unwrap();
+ }
+ let mut result = w.finish().unwrap();
+
+ let result_len = result.len();
+
+ for _ in 0..200 {
+ result.extend(v.iter().copied());
+ }
+
+ let mut r = read::ZlibDecoder::new(&result[..]);
+ let mut ret = Vec::new();
+ r.read_to_end(&mut ret).unwrap();
+ assert_eq!(ret, real);
+ assert_eq!(r.total_in(), result_len as u64);
+ }
+
+ #[test]
+ fn roundtrip2() {
+ let v = crate::random_bytes().take(1024 * 1024).collect::<Vec<_>>();
+ let mut r = read::ZlibDecoder::new(read::ZlibEncoder::new(&v[..], Compression::default()));
+ let mut ret = Vec::new();
+ r.read_to_end(&mut ret).unwrap();
+ assert_eq!(ret, v);
+ }
+
+ #[test]
+ fn roundtrip3() {
+ let v = crate::random_bytes().take(1024 * 1024).collect::<Vec<_>>();
+ let mut w =
+ write::ZlibEncoder::new(write::ZlibDecoder::new(Vec::new()), Compression::default());
+ w.write_all(&v).unwrap();
+ let w = w.finish().unwrap().finish().unwrap();
+ assert_eq!(w, v);
+ }
+
+ #[test]
+ fn reset_decoder() {
+ let v = crate::random_bytes().take(1024 * 1024).collect::<Vec<_>>();
+ let mut w = write::ZlibEncoder::new(Vec::new(), Compression::default());
+ w.write_all(&v).unwrap();
+ let data = w.finish().unwrap();
+
+ {
+ let (mut a, mut b, mut c) = (Vec::new(), Vec::new(), Vec::new());
+ let mut r = read::ZlibDecoder::new(&data[..]);
+ r.read_to_end(&mut a).unwrap();
+ r.reset(&data);
+ r.read_to_end(&mut b).unwrap();
+
+ let mut r = read::ZlibDecoder::new(&data[..]);
+ r.read_to_end(&mut c).unwrap();
+ assert!(a == b && b == c && c == v);
+ }
+
+ {
+ let mut w = write::ZlibDecoder::new(Vec::new());
+ w.write_all(&data).unwrap();
+ let a = w.reset(Vec::new()).unwrap();
+ w.write_all(&data).unwrap();
+ let b = w.finish().unwrap();
+
+ let mut w = write::ZlibDecoder::new(Vec::new());
+ w.write_all(&data).unwrap();
+ let c = w.finish().unwrap();
+ assert!(a == b && b == c && c == v);
+ }
+ }
+
+ #[test]
+ fn bad_input() {
+ // regress tests: previously caused a panic on drop
+ let mut out: Vec<u8> = Vec::new();
+ let data: Vec<u8> = (0..255).cycle().take(1024).collect();
+ let mut w = write::ZlibDecoder::new(&mut out);
+ match w.write_all(&data[..]) {
+ Ok(_) => panic!("Expected an error to be returned!"),
+ Err(e) => assert_eq!(e.kind(), io::ErrorKind::InvalidInput),
+ }
+ }
+
+ #[test]
+ fn qc_reader() {
+ ::quickcheck::quickcheck(test as fn(_) -> _);
+
+ fn test(v: Vec<u8>) -> bool {
+ let mut r =
+ read::ZlibDecoder::new(read::ZlibEncoder::new(&v[..], Compression::default()));
+ let mut v2 = Vec::new();
+ r.read_to_end(&mut v2).unwrap();
+ v == v2
+ }
+ }
+
+ #[test]
+ fn qc_writer() {
+ ::quickcheck::quickcheck(test as fn(_) -> _);
+
+ fn test(v: Vec<u8>) -> bool {
+ let mut w = write::ZlibEncoder::new(
+ write::ZlibDecoder::new(Vec::new()),
+ Compression::default(),
+ );
+ w.write_all(&v).unwrap();
+ v == w.finish().unwrap().finish().unwrap()
+ }
+ }
+}
diff --git a/vendor/flate2/src/zlib/read.rs b/vendor/flate2/src/zlib/read.rs
new file mode 100644
index 0000000..3b41ae6
--- /dev/null
+++ b/vendor/flate2/src/zlib/read.rs
@@ -0,0 +1,275 @@
+use std::io;
+use std::io::prelude::*;
+
+use super::bufread;
+use crate::bufreader::BufReader;
+use crate::Decompress;
+
+/// A ZLIB encoder, or compressor.
+///
+/// This structure implements a [`Read`] interface. When read from, it reads
+/// uncompressed data from the underlying [`Read`] and provides the compressed data.
+///
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use flate2::Compression;
+/// use flate2::read::ZlibEncoder;
+/// use std::fs::File;
+///
+/// // Open example file and compress the contents using Read interface
+///
+/// # fn open_hello_world() -> std::io::Result<Vec<u8>> {
+/// let f = File::open("examples/hello_world.txt")?;
+/// let mut z = ZlibEncoder::new(f, Compression::fast());
+/// let mut buffer = Vec::new();
+/// z.read_to_end(&mut buffer)?;
+/// # Ok(buffer)
+/// # }
+/// ```
+#[derive(Debug)]
+pub struct ZlibEncoder<R> {
+ inner: bufread::ZlibEncoder<BufReader<R>>,
+}
+
+impl<R: Read> ZlibEncoder<R> {
+ /// Creates a new encoder which will read uncompressed data from the given
+ /// stream and emit the compressed stream.
+ pub fn new(r: R, level: crate::Compression) -> ZlibEncoder<R> {
+ ZlibEncoder {
+ inner: bufread::ZlibEncoder::new(BufReader::new(r), level),
+ }
+ }
+
+ /// Creates a new encoder with the given `compression` settings which will
+ /// read uncompressed data from the given stream `r` and emit the compressed stream.
+ pub fn new_with_compress(r: R, compression: crate::Compress) -> ZlibEncoder<R> {
+ ZlibEncoder {
+ inner: bufread::ZlibEncoder::new_with_compress(BufReader::new(r), compression),
+ }
+ }
+}
+
+impl<R> ZlibEncoder<R> {
+ /// Resets the state of this encoder entirely, swapping out the input
+ /// stream for another.
+ ///
+ /// This function will reset the internal state of this encoder and replace
+ /// the input stream with the one provided, returning the previous input
+ /// stream. Future data read from this encoder will be the compressed
+ /// version of `r`'s data.
+ ///
+ /// Note that there may be currently buffered data when this function is
+ /// called, and in that case the buffered data is discarded.
+ pub fn reset(&mut self, r: R) -> R {
+ super::bufread::reset_encoder_data(&mut self.inner);
+ self.inner.get_mut().reset(r)
+ }
+
+ /// Acquires a reference to the underlying stream
+ pub fn get_ref(&self) -> &R {
+ self.inner.get_ref().get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying stream
+ ///
+ /// Note that mutation of the stream may result in surprising results if
+ /// this encoder is continued to be used.
+ pub fn get_mut(&mut self) -> &mut R {
+ self.inner.get_mut().get_mut()
+ }
+
+ /// Consumes this encoder, returning the underlying reader.
+ ///
+ /// Note that there may be buffered bytes which are not re-acquired as part
+ /// of this transition. It's recommended to only call this function after
+ /// EOF has been reached.
+ pub fn into_inner(self) -> R {
+ self.inner.into_inner().into_inner()
+ }
+
+ /// Returns the number of bytes that have been read into this compressor.
+ ///
+ /// Note that not all bytes read from the underlying object may be accounted
+ /// for, there may still be some active buffering.
+ pub fn total_in(&self) -> u64 {
+ self.inner.total_in()
+ }
+
+ /// Returns the number of bytes that the compressor has produced.
+ ///
+ /// Note that not all bytes may have been read yet, some may still be
+ /// buffered.
+ pub fn total_out(&self) -> u64 {
+ self.inner.total_out()
+ }
+}
+
+impl<R: Read> Read for ZlibEncoder<R> {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.read(buf)
+ }
+}
+
+impl<W: Read + Write> Write for ZlibEncoder<W> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.get_mut().write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.get_mut().flush()
+ }
+}
+
+/// A ZLIB decoder, or decompressor.
+///
+/// This structure implements a [`Read`] interface. When read from, it reads
+/// compressed data from the underlying [`Read`] and provides the uncompressed data.
+///
+/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// # use flate2::Compression;
+/// # use flate2::write::ZlibEncoder;
+/// use flate2::read::ZlibDecoder;
+///
+/// # fn main() {
+/// # let mut e = ZlibEncoder::new(Vec::new(), Compression::default());
+/// # e.write_all(b"Hello World").unwrap();
+/// # let bytes = e.finish().unwrap();
+/// # println!("{}", decode_reader(bytes).unwrap());
+/// # }
+/// #
+/// // Uncompresses a Zlib Encoded vector of bytes and returns a string or error
+/// // Here &[u8] implements Read
+///
+/// fn decode_reader(bytes: Vec<u8>) -> io::Result<String> {
+/// let mut z = ZlibDecoder::new(&bytes[..]);
+/// let mut s = String::new();
+/// z.read_to_string(&mut s)?;
+/// Ok(s)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct ZlibDecoder<R> {
+ inner: bufread::ZlibDecoder<BufReader<R>>,
+}
+
+impl<R: Read> ZlibDecoder<R> {
+ /// Creates a new decoder which will decompress data read from the given
+ /// stream.
+ pub fn new(r: R) -> ZlibDecoder<R> {
+ ZlibDecoder::new_with_buf(r, vec![0; 32 * 1024])
+ }
+
+ /// Creates a new decoder which will decompress data read from the given
+ /// stream `r`, using `buf` as backing to speed up reading.
+ ///
+ /// Note that the specified buffer will only be used up to its current
+ /// length. The buffer's capacity will also not grow over time.
+ pub fn new_with_buf(r: R, buf: Vec<u8>) -> ZlibDecoder<R> {
+ ZlibDecoder {
+ inner: bufread::ZlibDecoder::new(BufReader::with_buf(buf, r)),
+ }
+ }
+
+ /// Creates a new decoder which will decompress data read from the given
+ /// stream `r`, along with `decompression` settings.
+ pub fn new_with_decompress(r: R, decompression: Decompress) -> ZlibDecoder<R> {
+ ZlibDecoder::new_with_decompress_and_buf(r, vec![0; 32 * 1024], decompression)
+ }
+
+ /// Creates a new decoder which will decompress data read from the given
+ /// stream `r`, using `buf` as backing to speed up reading,
+ /// along with `decompression` settings to configure decoder.
+ ///
+ /// Note that the specified buffer will only be used up to its current
+ /// length. The buffer's capacity will also not grow over time.
+ pub fn new_with_decompress_and_buf(
+ r: R,
+ buf: Vec<u8>,
+ decompression: Decompress,
+ ) -> ZlibDecoder<R> {
+ ZlibDecoder {
+ inner: bufread::ZlibDecoder::new_with_decompress(
+ BufReader::with_buf(buf, r),
+ decompression,
+ ),
+ }
+ }
+}
+
+impl<R> ZlibDecoder<R> {
+ /// Resets the state of this decoder entirely, swapping out the input
+ /// stream for another.
+ ///
+ /// This will reset the internal state of this decoder and replace the
+ /// input stream with the one provided, returning the previous input
+ /// stream. Future data read from this decoder will be the decompressed
+ /// version of `r`'s data.
+ ///
+ /// Note that there may be currently buffered data when this function is
+ /// called, and in that case the buffered data is discarded.
+ pub fn reset(&mut self, r: R) -> R {
+ super::bufread::reset_decoder_data(&mut self.inner);
+ self.inner.get_mut().reset(r)
+ }
+
+ /// Acquires a reference to the underlying stream
+ pub fn get_ref(&self) -> &R {
+ self.inner.get_ref().get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying stream
+ ///
+ /// Note that mutation of the stream may result in surprising results if
+ /// this decoder is continued to be used.
+ pub fn get_mut(&mut self) -> &mut R {
+ self.inner.get_mut().get_mut()
+ }
+
+ /// Consumes this decoder, returning the underlying reader.
+ ///
+ /// Note that there may be buffered bytes which are not re-acquired as part
+ /// of this transition. It's recommended to only call this function after
+ /// EOF has been reached.
+ pub fn into_inner(self) -> R {
+ self.inner.into_inner().into_inner()
+ }
+
+ /// Returns the number of bytes that the decompressor has consumed.
+ ///
+ /// Note that this will likely be smaller than what the decompressor
+ /// actually read from the underlying stream due to buffering.
+ pub fn total_in(&self) -> u64 {
+ self.inner.total_in()
+ }
+
+ /// Returns the number of bytes that the decompressor has produced.
+ pub fn total_out(&self) -> u64 {
+ self.inner.total_out()
+ }
+}
+
+impl<R: Read> Read for ZlibDecoder<R> {
+ fn read(&mut self, into: &mut [u8]) -> io::Result<usize> {
+ self.inner.read(into)
+ }
+}
+
+impl<R: Read + Write> Write for ZlibDecoder<R> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.get_mut().write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.get_mut().flush()
+ }
+}
diff --git a/vendor/flate2/src/zlib/write.rs b/vendor/flate2/src/zlib/write.rs
new file mode 100644
index 0000000..d8ad2f2
--- /dev/null
+++ b/vendor/flate2/src/zlib/write.rs
@@ -0,0 +1,340 @@
+use std::io;
+use std::io::prelude::*;
+
+use crate::zio;
+use crate::{Compress, Decompress};
+
+/// A ZLIB encoder, or compressor.
+///
+/// This structure implements a [`Write`] interface and takes a stream of
+/// uncompressed data, writing the compressed data to the wrapped writer.
+///
+/// [`Write`]: https://doc.rust-lang.org/std/io/trait.Write.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use flate2::Compression;
+/// use flate2::write::ZlibEncoder;
+///
+/// // Vec<u8> implements Write, assigning the compressed bytes of sample string
+///
+/// # fn zlib_encoding() -> std::io::Result<()> {
+/// let mut e = ZlibEncoder::new(Vec::new(), Compression::default());
+/// e.write_all(b"Hello World")?;
+/// let compressed = e.finish()?;
+/// # Ok(())
+/// # }
+/// ```
+#[derive(Debug)]
+pub struct ZlibEncoder<W: Write> {
+ inner: zio::Writer<W, Compress>,
+}
+
+impl<W: Write> ZlibEncoder<W> {
+ /// Creates a new encoder which will write compressed data to the stream
+ /// given at the given compression level.
+ ///
+ /// When this encoder is dropped or unwrapped the final pieces of data will
+ /// be flushed.
+ pub fn new(w: W, level: crate::Compression) -> ZlibEncoder<W> {
+ ZlibEncoder {
+ inner: zio::Writer::new(w, Compress::new(level, true)),
+ }
+ }
+
+ /// Creates a new encoder which will write compressed data to the stream
+ /// `w` with the given `compression` settings.
+ pub fn new_with_compress(w: W, compression: Compress) -> ZlibEncoder<W> {
+ ZlibEncoder {
+ inner: zio::Writer::new(w, compression),
+ }
+ }
+
+ /// Acquires a reference to the underlying writer.
+ pub fn get_ref(&self) -> &W {
+ self.inner.get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying writer.
+ ///
+ /// Note that mutating the output/input state of the stream may corrupt this
+ /// object, so care must be taken when using this method.
+ pub fn get_mut(&mut self) -> &mut W {
+ self.inner.get_mut()
+ }
+
+ /// Resets the state of this encoder entirely, swapping out the output
+ /// stream for another.
+ ///
+ /// This function will finish encoding the current stream into the current
+ /// output stream before swapping out the two output streams.
+ ///
+ /// After the current stream has been finished, this will reset the internal
+ /// state of this encoder and replace the output stream with the one
+ /// provided, returning the previous output stream. Future data written to
+ /// this encoder will be the compressed into the stream `w` provided.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn reset(&mut self, w: W) -> io::Result<W> {
+ self.inner.finish()?;
+ self.inner.data.reset();
+ Ok(self.inner.replace(w))
+ }
+
+ /// Attempt to finish this output stream, writing out final chunks of data.
+ ///
+ /// Note that this function can only be used once data has finished being
+ /// written to the output stream. After this function is called then further
+ /// calls to `write` may result in a panic.
+ ///
+ /// # Panics
+ ///
+ /// Attempts to write data to this stream may result in a panic after this
+ /// function is called.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn try_finish(&mut self) -> io::Result<()> {
+ self.inner.finish()
+ }
+
+ /// Consumes this encoder, flushing the output stream.
+ ///
+ /// This will flush the underlying data stream, close off the compressed
+ /// stream and, if successful, return the contained writer.
+ ///
+ /// Note that this function may not be suitable to call in a situation where
+ /// the underlying stream is an asynchronous I/O stream. To finish a stream
+ /// the `try_finish` (or `shutdown`) method should be used instead. To
+ /// re-acquire ownership of a stream it is safe to call this method after
+ /// `try_finish` or `shutdown` has returned `Ok`.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn finish(mut self) -> io::Result<W> {
+ self.inner.finish()?;
+ Ok(self.inner.take_inner())
+ }
+
+ /// Consumes this encoder, flushing the output stream.
+ ///
+ /// This will flush the underlying data stream and then return the contained
+ /// writer if the flush succeeded.
+ /// The compressed stream will not closed but only flushed. This
+ /// means that obtained byte array can by extended by another deflated
+ /// stream. To close the stream add the two bytes 0x3 and 0x0.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn flush_finish(mut self) -> io::Result<W> {
+ self.inner.flush()?;
+ Ok(self.inner.take_inner())
+ }
+
+ /// Returns the number of bytes that have been written to this compressor.
+ ///
+ /// Note that not all bytes written to this object may be accounted for,
+ /// there may still be some active buffering.
+ pub fn total_in(&self) -> u64 {
+ self.inner.data.total_in()
+ }
+
+ /// Returns the number of bytes that the compressor has produced.
+ ///
+ /// Note that not all bytes may have been written yet, some may still be
+ /// buffered.
+ pub fn total_out(&self) -> u64 {
+ self.inner.data.total_out()
+ }
+}
+
+impl<W: Write> Write for ZlibEncoder<W> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.inner.write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.inner.flush()
+ }
+}
+
+impl<W: Read + Write> Read for ZlibEncoder<W> {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.get_mut().read(buf)
+ }
+}
+
+/// A ZLIB decoder, or decompressor.
+///
+/// This structure implements a [`Write`] and will emit a stream of decompressed
+/// data when fed a stream of compressed data.
+///
+/// [`Write`]: https://doc.rust-lang.org/std/io/trait.Write.html
+///
+/// # Examples
+///
+/// ```
+/// use std::io::prelude::*;
+/// use std::io;
+/// # use flate2::Compression;
+/// # use flate2::write::ZlibEncoder;
+/// use flate2::write::ZlibDecoder;
+///
+/// # fn main() {
+/// # let mut e = ZlibEncoder::new(Vec::new(), Compression::default());
+/// # e.write_all(b"Hello World").unwrap();
+/// # let bytes = e.finish().unwrap();
+/// # println!("{}", decode_reader(bytes).unwrap());
+/// # }
+/// #
+/// // Uncompresses a Zlib Encoded vector of bytes and returns a string or error
+/// // Here Vec<u8> implements Write
+///
+/// fn decode_reader(bytes: Vec<u8>) -> io::Result<String> {
+/// let mut writer = Vec::new();
+/// let mut z = ZlibDecoder::new(writer);
+/// z.write_all(&bytes[..])?;
+/// writer = z.finish()?;
+/// let return_string = String::from_utf8(writer).expect("String parsing error");
+/// Ok(return_string)
+/// }
+/// ```
+#[derive(Debug)]
+pub struct ZlibDecoder<W: Write> {
+ inner: zio::Writer<W, Decompress>,
+}
+
+impl<W: Write> ZlibDecoder<W> {
+ /// Creates a new decoder which will write uncompressed data to the stream.
+ ///
+ /// When this decoder is dropped or unwrapped the final pieces of data will
+ /// be flushed.
+ pub fn new(w: W) -> ZlibDecoder<W> {
+ ZlibDecoder {
+ inner: zio::Writer::new(w, Decompress::new(true)),
+ }
+ }
+
+ /// Creates a new decoder which will write uncompressed data to the stream `w`
+ /// using the given `decompression` settings.
+ ///
+ /// When this decoder is dropped or unwrapped the final pieces of data will
+ /// be flushed.
+ pub fn new_with_decompress(w: W, decompression: Decompress) -> ZlibDecoder<W> {
+ ZlibDecoder {
+ inner: zio::Writer::new(w, decompression),
+ }
+ }
+
+ /// Acquires a reference to the underlying writer.
+ pub fn get_ref(&self) -> &W {
+ self.inner.get_ref()
+ }
+
+ /// Acquires a mutable reference to the underlying writer.
+ ///
+ /// Note that mutating the output/input state of the stream may corrupt this
+ /// object, so care must be taken when using this method.
+ pub fn get_mut(&mut self) -> &mut W {
+ self.inner.get_mut()
+ }
+
+ /// Resets the state of this decoder entirely, swapping out the output
+ /// stream for another.
+ ///
+ /// This will reset the internal state of this decoder and replace the
+ /// output stream with the one provided, returning the previous output
+ /// stream. Future data written to this decoder will be decompressed into
+ /// the output stream `w`.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn reset(&mut self, w: W) -> io::Result<W> {
+ self.inner.finish()?;
+ self.inner.data = Decompress::new(true);
+ Ok(self.inner.replace(w))
+ }
+
+ /// Attempt to finish this output stream, writing out final chunks of data.
+ ///
+ /// Note that this function can only be used once data has finished being
+ /// written to the output stream. After this function is called then further
+ /// calls to `write` may result in a panic.
+ ///
+ /// # Panics
+ ///
+ /// Attempts to write data to this stream may result in a panic after this
+ /// function is called.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn try_finish(&mut self) -> io::Result<()> {
+ self.inner.finish()
+ }
+
+ /// Consumes this encoder, flushing the output stream.
+ ///
+ /// This will flush the underlying data stream and then return the contained
+ /// writer if the flush succeeded.
+ ///
+ /// Note that this function may not be suitable to call in a situation where
+ /// the underlying stream is an asynchronous I/O stream. To finish a stream
+ /// the `try_finish` (or `shutdown`) method should be used instead. To
+ /// re-acquire ownership of a stream it is safe to call this method after
+ /// `try_finish` or `shutdown` has returned `Ok`.
+ ///
+ /// # Errors
+ ///
+ /// This function will perform I/O to complete this stream, and any I/O
+ /// errors which occur will be returned from this function.
+ pub fn finish(mut self) -> io::Result<W> {
+ self.inner.finish()?;
+ Ok(self.inner.take_inner())
+ }
+
+ /// Returns the number of bytes that the decompressor has consumed for
+ /// decompression.
+ ///
+ /// Note that this will likely be smaller than the number of bytes
+ /// successfully written to this stream due to internal buffering.
+ pub fn total_in(&self) -> u64 {
+ self.inner.data.total_in()
+ }
+
+ /// Returns the number of bytes that the decompressor has written to its
+ /// output stream.
+ pub fn total_out(&self) -> u64 {
+ self.inner.data.total_out()
+ }
+}
+
+impl<W: Write> Write for ZlibDecoder<W> {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ self.inner.write(buf)
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ self.inner.flush()
+ }
+}
+
+impl<W: Read + Write> Read for ZlibDecoder<W> {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.inner.get_mut().read(buf)
+ }
+}
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