blob: 79d41f7c3a6fb7f84df42275ff9bf723ff147eda (
plain)
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
|
/* ****************************************************************************
* string/memchr.c -- Look for a character in a memory area.
* Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
*
* This file is part of the 'all/core' module,
* in libcarrot, an experimental modular libc project.
*
* This file is free software: you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option)
* any later version.
*
* This file 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 Lesser General Lesser Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this file. If not, see <http://www.gnu.org/licenses/>.
* ************************************************************************* */
#include <string.h>
/**
* memchr:
* Search a character in a memory area.
*
* @arg s a pointer to the memory area.
* @arg c the character.
* @arg n the length of the area.
* @return either the pointer to the found character, or NULL if not.
*/
void *memchr(const void *s, int c, size_t n)
{
const unsigned char *us = (const void*)s;
while (n-- && *us != c) us++;
return ((void*)us);
}
|