xref: /PHP-8.3/ext/hash/php_hash_fnv.h (revision 36559fb2)
1 /*
2   +----------------------------------------------------------------------+
3   | Copyright (c) The PHP Group                                          |
4   +----------------------------------------------------------------------+
5   | This source file is subject to version 3.01 of the PHP license,      |
6   | that is bundled with this package in the file LICENSE, and is        |
7   | available through the world-wide-web at the following url:           |
8   | https://www.php.net/license/3_01.txt                                 |
9   | If you did not receive a copy of the PHP license and are unable to   |
10   | obtain it through the world-wide-web, please send a note to          |
11   | license@php.net so we can mail you a copy immediately.               |
12   +----------------------------------------------------------------------+
13   | Author: Michael Maclean <mgdm@php.net>                               |
14   +----------------------------------------------------------------------+
15 */
16 
17 #ifndef PHP_HASH_FNV_H
18 #define PHP_HASH_FNV_H
19 
20 #define PHP_FNV1_32_INIT ((uint32_t)0x811c9dc5)
21 
22 #define PHP_FNV_32_PRIME ((uint32_t)0x01000193)
23 
24 #define PHP_FNV1_64_INIT ((uint64_t)0xcbf29ce484222325ULL)
25 
26 #define PHP_FNV_64_PRIME ((uint64_t)0x100000001b3ULL)
27 
28 
29 /*
30  * hash types
31  */
32 enum php_fnv_type {
33 	PHP_FNV_NONE  = 0,	/* invalid FNV hash type */
34 	PHP_FNV0_32   = 1,	/* FNV-0 32 bit hash */
35 	PHP_FNV1_32   = 2,	/* FNV-1 32 bit hash */
36 	PHP_FNV1a_32  = 3,	/* FNV-1a 32 bit hash */
37 	PHP_FNV0_64   = 4,	/* FNV-0 64 bit hash */
38 	PHP_FNV1_64   = 5,	/* FNV-1 64 bit hash */
39 	PHP_FNV1a_64  = 6,	/* FNV-1a 64 bit hash */
40 };
41 
42 typedef struct {
43 	uint32_t state;
44 } PHP_FNV132_CTX;
45 #define PHP_FNV132_SPEC "l."
46 
47 typedef struct {
48 	uint64_t state;
49 } PHP_FNV164_CTX;
50 #define PHP_FNV164_SPEC "q."
51 
52 
53 PHP_HASH_API void PHP_FNV132Init(PHP_FNV132_CTX *context, ZEND_ATTRIBUTE_UNUSED HashTable *args);
54 PHP_HASH_API void PHP_FNV132Update(PHP_FNV132_CTX *context, const unsigned char *input, size_t inputLen);
55 PHP_HASH_API void PHP_FNV1a32Update(PHP_FNV132_CTX *context, const unsigned char *input, size_t inputLen);
56 PHP_HASH_API void PHP_FNV132Final(unsigned char digest[4], PHP_FNV132_CTX * context);
57 
58 PHP_HASH_API void PHP_FNV164Init(PHP_FNV164_CTX *context, ZEND_ATTRIBUTE_UNUSED HashTable *args);
59 PHP_HASH_API void PHP_FNV164Update(PHP_FNV164_CTX *context, const unsigned char *input, size_t inputLen);
60 PHP_HASH_API void PHP_FNV1a64Update(PHP_FNV164_CTX *context, const unsigned char *input, size_t inputLen);
61 PHP_HASH_API void PHP_FNV164Final(unsigned char digest[8], PHP_FNV164_CTX * context);
62 
63 static uint32_t fnv_32_buf(void *buf, size_t len, uint32_t hval, int alternate);
64 static uint64_t fnv_64_buf(void *buf, size_t len, uint64_t hval, int alternate);
65 
66 #endif
67