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AK: Allow seed value to be specified in string_hash()

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For some algorithms, such as bloom filters, it's possible to reuse a
hash function (rather than having different hashing functions) if the
seed is different each time the hash function is used.

Modify AK::string_hash() to take a seed parameter, which defaults to 0
(the value the hash value was originally initialized to).
This commit is contained in:
Leandro Pereira 2021-09-30 21:33:55 -07:00 • committed by Andreas Kling
commit 368e74fdf8
Notes: sideshowbarker 2024-07-18 01:52:57 +09:00
1 changed files with 2 additions and 2 deletions
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4
AK/StringHash.h
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@ -10,9 +10,9 @@
namespace AK {
constexpr u32 string_hash(char const* characters, size_t length)
constexpr u32 string_hash(char const* characters, size_t length, u32 seed = 0)
{
u32 hash = 0;
u32 hash = seed;
for (size_t i = 0; i < length; ++i) {
hash += (u32)characters[i];
hash += (hash << 10);