Charlie Marsh
6ff21374dc
This crate started off as generic caching utilities, but we started adding a lot of Puffin-specific stuff (like the cache buckets abstraction that knows about Git vs. direct URL vs. indexes and so on). This PR moves the generic stuff into a new `cache-key` crate.
23 lines
620 B
Rust
23 lines
620 B
Rust
use std::hash::Hasher;
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use crate::cache_key::{CacheKey, CacheKeyHasher};
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/// Compute a hex string hash of a `CacheKey` object.
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///
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/// The value returned by [`digest`] should be stable across releases and platforms.
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pub fn digest<H: CacheKey>(hashable: &H) -> String {
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to_hex(cache_key_u64(hashable))
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}
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/// Convert a u64 to a hex string.
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fn to_hex(num: u64) -> String {
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hex::encode(num.to_le_bytes())
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}
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/// Compute a u64 hash of a [`CacheKey`] object.
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fn cache_key_u64<H: CacheKey>(hashable: &H) -> u64 {
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let mut hasher = CacheKeyHasher::new();
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hashable.cache_key(&mut hasher);
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hasher.finish()
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}
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