Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 167 insertions, 0 deletions

diff --git a/third_party/rust/miniz_oxide/src/lib.rs b/third_party/rust/miniz_oxide/src/lib.rs
new file mode 100644
index 0000000000..d459fe6a70
--- /dev/null
+++ b/third_party/rust/miniz_oxide/src/lib.rs
@@ -0,0 +1,167 @@
+//! A pure rust replacement for the [miniz](https://github.com/richgel999/miniz)
+//! DEFLATE/zlib encoder/decoder.
+//! The plan for this crate is to be used as a back-end for the
+//! [flate2](https://github.com/alexcrichton/flate2-rs) crate and eventually remove the
+//! need to depend on a C library.
+//!
+//! # Usage
+//! ## Simple compression/decompression:
+//! ``` rust
+//!
+//! use miniz_oxide::inflate::decompress_to_vec;
+//! use miniz_oxide::deflate::compress_to_vec;
+//!
+//! fn roundtrip(data: &[u8]) {
+//!     let compressed = compress_to_vec(data, 6);
+//!     let decompressed = decompress_to_vec(compressed.as_slice()).expect("Failed to decompress!");
+//! #   let _ = decompressed;
+//! }
+//!
+//! # roundtrip(b"Test_data test data lalalal blabla");
+//!
+//! ```
+
+#![allow(warnings)]
+#![forbid(unsafe_code)]
+#![cfg_attr(any(has_alloc, feature = "rustc-dep-of-std"), no_std)]
+
+// autocfg does not work when building in libstd, so manually enable this for that use case now.
+#[cfg(any(has_alloc, feature = "rustc-dep-of-std"))]
+extern crate alloc;
+#[cfg(all(not(has_alloc), not(feature = "rustc-dep-of-std")))]
+use std as alloc;
+
+#[cfg(test)]
+extern crate std;
+
+pub mod deflate;
+pub mod inflate;
+mod shared;
+
+pub use crate::shared::update_adler32 as mz_adler32_oxide;
+pub use crate::shared::{MZ_ADLER32_INIT, MZ_DEFAULT_WINDOW_BITS};
+
+/// A list of flush types.
+///
+/// See [http://www.bolet.org/~pornin/deflate-flush.html] for more in-depth info.
+#[repr(i32)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+pub enum MZFlush {
+    /// Don't force any flushing.
+    /// Used when more input data is expected.
+    None = 0,
+    /// Zlib partial flush.
+    /// Currently treated as `Sync`.
+    Partial = 1,
+    /// Finish compressing the currently buffered data, and output an empty raw block.
+    /// Has no use in decompression.
+    Sync = 2,
+    /// Same as `Sync`, but resets the compression dictionary so that further compressed
+    /// data does not depend on data compressed before the flush.
+    /// Has no use in decompression.
+    Full = 3,
+    /// Attempt to flush the remaining data and end the stream.
+    Finish = 4,
+    /// Not implemented.
+    Block = 5,
+}
+
+impl MZFlush {
+    /// Create an MZFlush value from an integer value.
+    ///
+    /// Returns `MZError::Param` on invalid values.
+    pub fn new(flush: i32) -> Result<Self, MZError> {
+        match flush {
+            0 => Ok(MZFlush::None),
+            1 | 2 => Ok(MZFlush::Sync),
+            3 => Ok(MZFlush::Full),
+            4 => Ok(MZFlush::Finish),
+            _ => Err(MZError::Param),
+        }
+    }
+}
+
+/// A list of miniz successful status codes.
+#[repr(i32)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+pub enum MZStatus {
+    Ok = 0,
+    StreamEnd = 1,
+    NeedDict = 2,
+}
+
+/// A list of miniz failed status codes.
+#[repr(i32)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+pub enum MZError {
+    ErrNo = -1,
+    Stream = -2,
+    Data = -3,
+    Mem = -4,
+    Buf = -5,
+    Version = -6,
+    Param = -10_000,
+}
+
+/// How compressed data is wrapped.
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+pub enum DataFormat {
+    /// Wrapped using the [zlib](http://www.zlib.org/rfc-zlib.html) format.
+    Zlib,
+    /// Raw DEFLATE.
+    Raw,
+}
+
+impl DataFormat {
+    pub(crate) fn from_window_bits(window_bits: i32) -> DataFormat {
+        if window_bits > 0 {
+            DataFormat::Zlib
+        } else {
+            DataFormat::Raw
+        }
+    }
+
+    pub(crate) fn to_window_bits(self) -> i32 {
+        match self {
+            DataFormat::Zlib => shared::MZ_DEFAULT_WINDOW_BITS,
+            DataFormat::Raw => -shared::MZ_DEFAULT_WINDOW_BITS,
+        }
+    }
+}
+
+/// `Result` alias for all miniz status codes both successful and failed.
+pub type MZResult = Result<MZStatus, MZError>;
+
+/// A structure containg the result of a call to the inflate or deflate streaming functions.
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+pub struct StreamResult {
+    /// The number of bytes consumed from the input slice.
+    pub bytes_consumed: usize,
+    /// The number of bytes written to the output slice.
+    pub bytes_written: usize,
+    /// The return status of the call.
+    pub status: MZResult,
+}
+
+impl StreamResult {
+    #[inline]
+    pub(crate) fn error(error: MZError) -> StreamResult {
+        StreamResult {
+            bytes_consumed: 0,
+            bytes_written: 0,
+            status: Err(error),
+        }
+    }
+}
+
+impl core::convert::From<StreamResult> for MZResult {
+    fn from(res: StreamResult) -> Self {
+        res.status
+    }
+}
+
+impl core::convert::From<&StreamResult> for MZResult {
+    fn from(res: &StreamResult) -> Self {
+        res.status
+    }
+}