system/serenity
system/serenity
1
0
Fork 0
mirror of https://github.com/SerenityOS/serenity synced 2024-07-01 11:19:21 +00:00
Code Issues Projects Releases Wiki Activity

AK: Remove unused rehash_for_collision

Browse Source
This commit is contained in:
Jelle Raaijmakers 2023-02-14 01:35:10 +01:00 committed by Andrew Kaster
parent c08d137fcd
commit 4cd3a84c4b
2 changed files with 0 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
AK/HashFunctions.h
View File

@ -19,20 +19,6 @@ constexpr unsigned int_hash(u32 key)
return key;
}
constexpr unsigned rehash_for_collision(u32 key)
{
unsigned const magic = 0xBA5EDB01;
if (key == magic)
return 0u;
if (key == 0u)
key = magic;
key ^= key << 13;
key ^= key >> 17;
key ^= key << 5;
return key;
}
constexpr unsigned pair_int_hash(u32 key1, u32 key2)
{
return int_hash((int_hash(key1) * 209) ^ (int_hash(key2 * 413)));

7
Tests/AK/TestHashFunctions.cpp
View File

@ -15,13 +15,6 @@ TEST_CASE(int_hash)
static_assert(int_hash(0) == 1177991625u);
}
TEST_CASE(rehash_for_collision)
{
static_assert(rehash_for_collision(666) == 171644115u);
static_assert(rehash_for_collision(0) == 1189591134u);
static_assert(rehash_for_collision(0xBA5EDB01) == 0u);
}
TEST_CASE(pair_int_hash)
{
static_assert(pair_int_hash(42, 17) == 339337046u);