RPM build fix (reverted CI changes which will need to be un-reverted or made conditional) and vendor Rust dependencies to make builds much faster in any CI system.

zeroidc/vendor/ring/src/bits.rs

@@ -0,0 +1,64 @@
+// Copyright 2016 Brian Smith.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
+// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+use crate::error;
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq, PartialOrd)]
+pub struct BitLength(usize);
+
+// Lengths measured in bits, where all arithmetic is guaranteed not to
+// overflow.
+impl BitLength {
+    #[inline]
+    pub const fn from_usize_bits(bits: usize) -> Self {
+        Self(bits)
+    }
+
+    #[inline]
+    pub fn from_usize_bytes(bytes: usize) -> Result<Self, error::Unspecified> {
+        let bits = bytes.checked_mul(8).ok_or(error::Unspecified)?;
+        Ok(Self::from_usize_bits(bits))
+    }
+
+    #[cfg(feature = "alloc")]
+    #[inline]
+    pub fn half_rounded_up(&self) -> Self {
+        let round_up = self.0 & 1;
+        Self((self.0 / 2) + round_up)
+    }
+
+    #[inline]
+    pub fn as_usize_bits(&self) -> usize {
+        self.0
+    }
+
+    #[cfg(feature = "alloc")]
+    #[inline]
+    pub fn as_usize_bytes_rounded_up(&self) -> usize {
+        // Equivalent to (self.0 + 7) / 8, except with no potential for
+        // overflow and without branches.
+
+        // Branchless round_up = if self.0 & 0b111 != 0 { 1 } else { 0 };
+        let round_up = ((self.0 >> 2) | (self.0 >> 1) | self.0) & 1;
+
+        (self.0 / 8) + round_up
+    }
+
+    #[cfg(feature = "alloc")]
+    #[inline]
+    pub fn try_sub_1(self) -> Result<BitLength, error::Unspecified> {
+        let sum = self.0.checked_sub(1).ok_or(error::Unspecified)?;
+        Ok(BitLength(sum))
+    }
+}