Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

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

1 files changed, 74 insertions, 0 deletions

diff --git a/vendor/bstr/src/bstr.rs b/vendor/bstr/src/bstr.rs
new file mode 100644
index 000000000..1e3c91b9a
--- /dev/null
+++ b/vendor/bstr/src/bstr.rs
@@ -0,0 +1,74 @@
+use core::mem;
+
+/// A wrapper for `&[u8]` that provides convenient string oriented trait impls.
+///
+/// If you need ownership or a growable byte string buffer, then use
+/// [`BString`](struct.BString.html).
+///
+/// Using a `&BStr` is just like using a `&[u8]`, since `BStr`
+/// implements `Deref` to `[u8]`. So all methods available on `[u8]`
+/// are also available on `BStr`.
+///
+/// # Representation
+///
+/// A `&BStr` has the same representation as a `&str`. That is, a `&BStr` is
+/// a fat pointer which consists of a pointer to some bytes and a length.
+///
+/// # Trait implementations
+///
+/// The `BStr` type has a number of trait implementations, and in particular,
+/// defines equality and ordinal comparisons between `&BStr`, `&str` and
+/// `&[u8]` for convenience.
+///
+/// The `Debug` implementation for `BStr` shows its bytes as a normal string.
+/// For invalid UTF-8, hex escape sequences are used.
+///
+/// The `Display` implementation behaves as if `BStr` were first lossily
+/// converted to a `str`. Invalid UTF-8 bytes are substituted with the Unicode
+/// replacement codepoint, which looks like this: �.
+#[derive(Hash)]
+#[repr(transparent)]
+pub struct BStr {
+    pub(crate) bytes: [u8],
+}
+
+impl BStr {
+    #[inline]
+    pub(crate) fn new<B: ?Sized + AsRef<[u8]>>(bytes: &B) -> &BStr {
+        BStr::from_bytes(bytes.as_ref())
+    }
+
+    #[inline]
+    pub(crate) fn new_mut<B: ?Sized + AsMut<[u8]>>(
+        bytes: &mut B,
+    ) -> &mut BStr {
+        BStr::from_bytes_mut(bytes.as_mut())
+    }
+
+    #[inline]
+    pub(crate) fn from_bytes(slice: &[u8]) -> &BStr {
+        unsafe { mem::transmute(slice) }
+    }
+
+    #[inline]
+    pub(crate) fn from_bytes_mut(slice: &mut [u8]) -> &mut BStr {
+        unsafe { mem::transmute(slice) }
+    }
+
+    #[inline]
+    #[cfg(feature = "std")]
+    pub(crate) fn from_boxed_bytes(slice: Box<[u8]>) -> Box<BStr> {
+        unsafe { Box::from_raw(Box::into_raw(slice) as _) }
+    }
+
+    #[inline]
+    #[cfg(feature = "std")]
+    pub(crate) fn into_boxed_bytes(slice: Box<BStr>) -> Box<[u8]> {
+        unsafe { Box::from_raw(Box::into_raw(slice) as _) }
+    }
+
+    #[inline]
+    pub(crate) fn as_bytes(&self) -> &[u8] {
+        &self.bytes
+    }
+}