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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /vendor/regex/src/find_byte.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/regex/src/find_byte.rs')
-rw-r--r-- | vendor/regex/src/find_byte.rs | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/vendor/regex/src/find_byte.rs b/vendor/regex/src/find_byte.rs new file mode 100644 index 000000000..e95f72afb --- /dev/null +++ b/vendor/regex/src/find_byte.rs @@ -0,0 +1,18 @@ +/// Searches for the given needle in the given haystack. +/// +/// If the perf-literal feature is enabled, then this uses the super optimized +/// memchr crate. Otherwise, it uses the naive byte-at-a-time implementation. +pub fn find_byte(needle: u8, haystack: &[u8]) -> Option<usize> { + #[cfg(not(feature = "perf-literal"))] + fn imp(needle: u8, haystack: &[u8]) -> Option<usize> { + haystack.iter().position(|&b| b == needle) + } + + #[cfg(feature = "perf-literal")] + fn imp(needle: u8, haystack: &[u8]) -> Option<usize> { + use memchr::memchr; + memchr(needle, haystack) + } + + imp(needle, haystack) +} |