xref: /PHP-7.1/ext/hash/php_hash_fnv.h (revision ccd4716e)
1 /*
2   +----------------------------------------------------------------------+
3   | PHP Version 7                                                        |
4   +----------------------------------------------------------------------+
5   | Copyright (c) 1997-2018 The PHP Group                                |
6   +----------------------------------------------------------------------+
7   | This source file is subject to version 3.01 of the PHP license,      |
8   | that is bundled with this package in the file LICENSE, and is        |
9   | available through the world-wide-web at the following url:           |
10   | http://www.php.net/license/3_01.txt                                  |
11   | If you did not receive a copy of the PHP license and are unable to   |
12   | obtain it through the world-wide-web, please send a note to          |
13   | license@php.net so we can mail you a copy immediately.               |
14   +----------------------------------------------------------------------+
15   | Author: Michael Maclean <mgdm@php.net>                               |
16   +----------------------------------------------------------------------+
17 */
18 
19 /* $Id$ */
20 
21 #ifndef PHP_HASH_FNV_H
22 #define PHP_HASH_FNV_H
23 
24 #define PHP_FNV1_32_INIT ((uint32_t)0x811c9dc5)
25 #define PHP_FNV1_32A_INIT PHP_FNV1_32_INIT
26 
27 #define PHP_FNV_32_PRIME ((uint32_t)0x01000193)
28 
29 #define PHP_FNV1_64_INIT ((uint64_t)0xcbf29ce484222325ULL)
30 #define PHP_FNV1A_64_INIT FNV1_64_INIT
31 
32 #define PHP_FNV_64_PRIME ((uint64_t)0x100000001b3ULL)
33 
34 
35 /*
36  * hash types
37  */
38 enum php_fnv_type {
39 	PHP_FNV_NONE  = 0,	/* invalid FNV hash type */
40 	PHP_FNV0_32   = 1,	/* FNV-0 32 bit hash */
41 	PHP_FNV1_32   = 2,	/* FNV-1 32 bit hash */
42 	PHP_FNV1a_32  = 3,	/* FNV-1a 32 bit hash */
43 	PHP_FNV0_64   = 4,	/* FNV-0 64 bit hash */
44 	PHP_FNV1_64   = 5,	/* FNV-1 64 bit hash */
45 	PHP_FNV1a_64  = 6,	/* FNV-1a 64 bit hash */
46 };
47 
48 typedef struct {
49 	uint32_t state;
50 } PHP_FNV132_CTX;
51 
52 typedef struct {
53 	uint64_t state;
54 } PHP_FNV164_CTX;
55 
56 
57 PHP_HASH_API void PHP_FNV132Init(PHP_FNV132_CTX *context);
58 PHP_HASH_API void PHP_FNV132Update(PHP_FNV132_CTX *context, const unsigned char *input, unsigned int inputLen);
59 PHP_HASH_API void PHP_FNV1a32Update(PHP_FNV132_CTX *context, const unsigned char *input, unsigned int inputLen);
60 PHP_HASH_API void PHP_FNV132Final(unsigned char digest[16], PHP_FNV132_CTX * context);
61 
62 PHP_HASH_API void PHP_FNV164Init(PHP_FNV164_CTX *context);
63 PHP_HASH_API void PHP_FNV164Update(PHP_FNV164_CTX *context, const unsigned char *input, unsigned int inputLen);
64 PHP_HASH_API void PHP_FNV1a64Update(PHP_FNV164_CTX *context, const unsigned char *input, unsigned int inputLen);
65 PHP_HASH_API void PHP_FNV164Final(unsigned char digest[16], PHP_FNV164_CTX * context);
66 
67 static uint32_t fnv_32_buf(void *buf, size_t len, uint32_t hval, int alternate);
68 static uint64_t fnv_64_buf(void *buf, size_t len, uint64_t hval, int alternate);
69 
70 #endif
71 
72 /*
73  * Local variables:
74  * tab-width: 4
75  * c-basic-offset: 4
76  * End:
77  * vim600: noet sw=4 ts=4 fdm=marker
78  * vim<600: noet sw=4 ts=4
79  */
80