From 368e74fdf84e66ecd201a4eac5bb213022c486b3 Mon Sep 17 00:00:00 2001
From: Leandro Pereira <leandro@hardinfo.org>
Date: Thu, 30 Sep 2021 21:33:55 -0700
Subject: [PATCH] AK: Allow seed value to be specified in string_hash()

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).
---
 AK/StringHash.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/AK/StringHash.h b/AK/StringHash.h
index 1e28c8426d..1a166ae040 100644
--- a/AK/StringHash.h
+++ b/AK/StringHash.h
@@ -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);