projects / thirdparty / squid.git / blame
| Commit | Line | Data |
|---|---|---|
| 5c193dec | 1 | /* |
| b8ae064d | 2 | * Copyright (C) 1996-2023 The Squid Software Foundation and contributors |
| 5c193dec AJ |
3 | * |
| 4 | * Squid software is distributed under GPLv2+ license and includes | |
| 5 | * contributions from numerous individuals and organizations. | |
| 6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
| 7 | */ | |
| 8 | ||
| b5638623 | 9 | #ifndef SQUID_HASH_H |
| 10 | #define SQUID_HASH_H | |
| 11 | ||
| f52a7d75 | 12 | typedef void HASHFREE(void *); |
| 13 | typedef int HASHCMP(const void *, const void *); | |
| 14 | typedef unsigned int HASHHASH(const void *, unsigned int); | |
| f52a7d75 | 15 | |
| 4b4693f9 FC |
16 | class hash_link { |
| 17 | public: | |
| 18 | hash_link() : key(nullptr), next(nullptr) {} | |
| 186477c1 | 19 | void *key; |
| f52a7d75 | 20 | hash_link *next; |
| 21 | }; | |
| 22 | ||
| 4b4693f9 FC |
23 | class hash_table { |
| 24 | public: | |
| f52a7d75 | 25 | hash_link **buckets; |
| 26 | HASHCMP *cmp; | |
| 27 | HASHHASH *hash; | |
| 28 | unsigned int size; | |
| 29 | unsigned int current_slot; | |
| 30 | hash_link *next; | |
| 31 | int count; | |
| 32 | }; | |
| 33 | ||
| e6ccf245 | 34 | SQUIDCEXTERN hash_table *hash_create(HASHCMP *, int, HASHHASH *); |
| 35 | SQUIDCEXTERN void hash_join(hash_table *, hash_link *); | |
| 36 | SQUIDCEXTERN void hash_remove_link(hash_table *, hash_link *); | |
| 37 | SQUIDCEXTERN int hashPrime(int n); | |
| 4a8b20e8 | 38 | SQUIDCEXTERN hash_link *hash_lookup(hash_table *, const void *); |
| e6ccf245 | 39 | SQUIDCEXTERN void hash_first(hash_table *); |
| 4a8b20e8 | 40 | SQUIDCEXTERN hash_link *hash_next(hash_table *); |
| e6ccf245 | 41 | SQUIDCEXTERN void hash_last(hash_table *); |
| 42 | SQUIDCEXTERN hash_link *hash_get_bucket(hash_table *, unsigned int); | |
| 43 | SQUIDCEXTERN void hashFreeMemory(hash_table *); | |
| 44 | SQUIDCEXTERN void hashFreeItems(hash_table *, HASHFREE *); | |
| 45 | SQUIDCEXTERN HASHHASH hash_string; | |
| 46 | SQUIDCEXTERN HASHHASH hash4; | |
| c85e510f | 47 | SQUIDCEXTERN const char *hashKeyStr(const hash_link *); |
| f52a7d75 | 48 | |
| 49 | /* | |
| 50 | * Here are some good prime number choices. It's important not to | |
| 51 | * choose a prime number that is too close to exact powers of 2. | |
| 52 | * | |
| 53 | * HASH_SIZE 103 // prime number < 128 | |
| 54 | * HASH_SIZE 229 // prime number < 256 | |
| 55 | * HASH_SIZE 467 // prime number < 512 | |
| 56 | * HASH_SIZE 977 // prime number < 1024 | |
| 57 | * HASH_SIZE 1979 // prime number < 2048 | |
| 58 | * HASH_SIZE 4019 // prime number < 4096 | |
| 59 | * HASH_SIZE 6037 // prime number < 6144 | |
| 60 | * HASH_SIZE 7951 // prime number < 8192 | |
| 61 | * HASH_SIZE 12149 // prime number < 12288 | |
| 62 | * HASH_SIZE 16231 // prime number < 16384 | |
| 63 | * HASH_SIZE 33493 // prime number < 32768 | |
| 64 | * HASH_SIZE 65357 // prime number < 65536 | |
| 65 | */ | |
| f53969cc | 66 | #define DEFAULT_HASH_SIZE 7951 /* prime number < 8192 */ |
| b5638623 | 67 | |
| 68 | #endif /* SQUID_HASH_H */ | |
| f53969cc | 69 |