blob: 8410370452dc10fee1486247cbf1f26c386fefe9 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/**
* mds — A micro-display server
* Copyright © 2014, 2015 Mattias Andrée (maandree@member.fsf.org)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MDS_LIBMDSSERVER_HASH_HELP_H
#define MDS_LIBMDSSERVER_HASH_HELP_H
#include <stdlib.h>
#include <string.h>
/**
* Calculate the hash of a string
*
* @param str The string
* @return The hash of the string
*/
static inline size_t __attribute__((pure)) string_hash(const char* str)
{
size_t hash = 0;
if (str != NULL)
while (*str != '\0')
hash = hash * 31 + (size_t)(unsigned char)*str++;
return hash;
}
/**
* Check whether two `char*` are of equal value
*
* @param str_a The first string
* @param str_b The second string
* @return Whether the strings are equals
*/
static inline int __attribute__((pure)) string_comparator(char* str_a, char* str_b)
{
if ((str_a != NULL) && (str_b != NULL) && (str_a != str_b))
return !strcmp((char*)str_a, (char*)str_b);
else
return str_a == str_b;
}
#endif
|
