Annotation of prex-old/boot/lib/string.c, Revision 1.1.1.1
1.1 nbrk 1: /*-
2: * Copyright (c) 2005, Kohsuke Ohtani
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the author nor the names of any co-contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: /*
31: * string.c - minimum string library
32: */
33:
34: #include <sys/types.h>
35:
36: char *strncpy(char *dest, const char *src, size_t count)
37: {
38: char *tmp = dest;
39:
40: while (count-- && (*dest++ = *src++) != '\0');
41: return tmp;
42: }
43:
44: int strncmp(const char *src, const char *tgt, size_t count)
45: {
46: signed char res = 0;
47:
48: while (count) {
49: if ((res = *src - *tgt++) != 0 || !*src++)
50: break;
51: count--;
52: }
53: return res;
54: }
55:
56: size_t strnlen(const char *str, size_t count)
57: {
58: const char *tmp;
59:
60: for (tmp = str; count-- && *tmp != '\0'; ++tmp);
61: return (size_t)(tmp - str);
62: }
63:
64: void *memcpy(void *dest, const void *src, size_t count)
65: {
66: char *tmp = (char *)dest, *s = (char *)src;
67:
68: while (count--)
69: *tmp++ = *s++;
70: return dest;
71: }
72:
73: void *memset(void *dest, int ch, size_t count)
74: {
75: char *p = (char *)dest;
76:
77: while (count--)
78: *p++ = (char)ch;
79: return dest;
80: }
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