22 lines
500 B
Rust
22 lines
500 B
Rust
/// A primitive hash function for matching opcodes.
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/// Must match `meta/constant_hash.py`.
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pub fn simple_hash(s: &str) -> u32 {
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let mut h: u32 = 5381;
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for c in s.chars() {
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h = (h ^ c as u32).wrapping_add(h.rotate_right(6));
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}
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h
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}
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#[cfg(test)]
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mod tests {
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use super::simple_hash;
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#[test]
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fn basic() {
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// c.f. meta/constant_hash.py tests.
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assert_eq!(simple_hash("Hello"), 0x2fa70c01);
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assert_eq!(simple_hash("world"), 0x5b0c31d5);
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}
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}
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