From 2aa4a82499d4becd2284cdb482213d541b8804dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 16:29:10 +0200 Subject: Adding upstream version 86.0.1. Signed-off-by: Daniel Baumann --- third_party/rust/tinystr/src/helpers.rs | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 third_party/rust/tinystr/src/helpers.rs (limited to 'third_party/rust/tinystr/src/helpers.rs') diff --git a/third_party/rust/tinystr/src/helpers.rs b/third_party/rust/tinystr/src/helpers.rs new file mode 100644 index 0000000000..9b5be84152 --- /dev/null +++ b/third_party/rust/tinystr/src/helpers.rs @@ -0,0 +1,23 @@ +use std::num::NonZeroU32; +use std::ptr::copy_nonoverlapping; + +use super::Error; + +#[inline(always)] +pub(crate) unsafe fn make_4byte_bytes( + bytes: &[u8], + len: usize, + mask: u32, +) -> Result { + // Mask is always supplied as little-endian. + let mask = u32::from_le(mask); + let mut word: u32 = 0; + copy_nonoverlapping(bytes.as_ptr(), &mut word as *mut u32 as *mut u8, len); + if (word & mask) != 0 { + return Err(Error::NonAscii); + } + if ((mask - word) & mask) != 0 { + return Err(Error::InvalidNull); + } + Ok(NonZeroU32::new_unchecked(word)) +} -- cgit v1.2.3