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make fnv1a_etend

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This commit is contained in:
J. Nick Koston
2026-01-17 11:46:54 -10:00
parent 657978b416
commit cd9ed4fdf1
1 changed files with 3 additions and 1 deletions
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4
esphome/core/helpers.h
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@@ -397,9 +397,11 @@ constexpr uint32_t FNV1_PRIME = 16777619UL;
/// Extend a FNV-1 hash with an integer (hashes each byte).
template<std::integral T> constexpr uint32_t fnv1_hash_extend(uint32_t hash, T value) {
using UnsignedT = std::make_unsigned_t<T>;
UnsignedT uvalue = static_cast<UnsignedT>(value);
for (size_t i = 0; i < sizeof(T); i++) {
hash *= FNV1_PRIME;
hash ^= (value >> (i * 8)) & 0xFF;
hash ^= (uvalue >> (i * 8)) & 0xFF;
}
return hash;
}