Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1/* -*- linux-c -*- ------------------------------------------------------- *
2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright 2007 rPath, Inc. - All Rights Reserved
5 *
6 * This file is part of the Linux kernel, and is made available under
7 * the terms of the GNU General Public License version 2.
8 *
9 * ----------------------------------------------------------------------- */
10
11/*
12 * arch/i386/boot/string.c
13 *
14 * Very basic string functions
15 */
16
17#include "boot.h"
18
19int strcmp(const char *str1, const char *str2)
20{
21 const unsigned char *s1 = (const unsigned char *)str1;
22 const unsigned char *s2 = (const unsigned char *)str2;
23 int delta = 0;
24
25 while (*s1 || *s2) {
26 delta = *s2 - *s1;
27 if (delta)
28 return delta;
29 s1++;
30 s2++;
31 }
32 return 0;
33}
34
35size_t strnlen(const char *s, size_t maxlen)
36{
37 const char *es = s;
38 while (*es && maxlen) {
39 es++;
40 maxlen--;
41 }
42
43 return (es - s);
44}
45
46unsigned int atou(const char *s)
47{
48 unsigned int i = 0;
49 while (isdigit(*s))
50 i = i * 10 + (*s++ - '0');
51 return i;
52}