raphiaura/KytyPS5
1
0
Fork 0
mirror of https://github.com/KytyPS5/KytyPS5.git synced 2026-10-21 03:16:54 +02:00
Code Issues Packages Projects Releases Wiki Activity

Initial commit

Browse Source
This commit is contained in:
nmzik
2026-07-16 10:21:41 +02:00
commit 147188b143
427 changed files with 205923 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/common/hash.h
+156
View File
@@ -0,0 +1,156 @@
#ifndef KYTY_COMMON_HASH_H_
#define KYTY_COMMON_HASH_H_
#include "common/common.h"
namespace Common {
inline uint32_t hash(const void* key, uint32_t key_len) {
uint32_t hash = 0;
const auto* ptr = static_cast<const uint8_t*>(key);
while (key_len >= 4) {
hash += ptr[0];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += ptr[1];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += ptr[2];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += ptr[3];
hash += (hash << 10u);
hash ^= (hash >> 6u);
key_len -= 4;
ptr += 4;
}
switch (key_len) {
case 3:
hash += ptr[2];
hash += (hash << 10u);
hash ^= (hash >> 6u);
[[fallthrough]];
case 2:
hash += ptr[1];
hash += (hash << 10u);
hash ^= (hash >> 6u);
[[fallthrough]];
case 1:
hash += ptr[0];
hash += (hash << 10u);
hash ^= (hash >> 6u);
[[fallthrough]];
default: break;
}
hash += (hash << 3u);
hash ^= (hash >> 11u);
hash += (hash << 15u);
return hash;
}
inline uint32_t hash8(uint8_t key) {
uint32_t hash = 0;
uint8_t* ptr = &key;
hash += ptr[0];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += (hash << 3u);
hash ^= (hash >> 11u);
hash += (hash << 15u);
return hash;
}
inline uint32_t hash16(uint16_t key) {
uint32_t hash = 0;
auto* ptr = reinterpret_cast<uint8_t*>(&key);
hash += ptr[0];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += ptr[1];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += (hash << 3u);
hash ^= (hash >> 11u);
hash += (hash << 15u);
return hash;
}
inline uint32_t hash32(uint32_t key) {
uint32_t hash = 0;
auto* ptr = reinterpret_cast<uint8_t*>(&key);
hash += ptr[0];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += ptr[1];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += ptr[2];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += ptr[3];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += (hash << 3u);
hash ^= (hash >> 11u);
hash += (hash << 15u);
return hash;
}
inline uint32_t hash64(uint64_t key) {
uint32_t hash = 0;
auto* ptr = reinterpret_cast<uint8_t*>(&key);
hash += ptr[0];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += ptr[1];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += ptr[2];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += ptr[3];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += ptr[4];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += ptr[5];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += ptr[6];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += ptr[7];
hash += (hash << 10u);
hash ^= (hash >> 6u);
hash += (hash << 3u);
hash ^= (hash >> 11u);
hash += (hash << 15u);
return hash;
}
} // namespace Common
#endif /* KYTY_COMMON_HASH_H_ */