1 /*
2 * string.c
3 *
4 * Copyright(c) 1998 - 2009 Texas Instruments. All rights reserved.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * * Neither the name Texas Instruments nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34
35 /*
36 * src/string.c
37 *
38 */
39
40 /**
41 * memcmp - Compare two areas of memory
42 * @cs: One area of memory
43 * @ct: Another area of memory
44 * @count: The size of the area.
45 */
memcmp(const void * cs,const void * ct,unsigned int count)46 int memcmp(const void * cs,const void * ct, unsigned int count)
47 {
48 const unsigned char *su1, *su2;
49 int res = 0;
50
51 for( su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
52 if ((res = *su1 - *su2) != 0)
53 break;
54 return res;
55 }
56
57 /**
58 * strcmp - Compare two strings
59 * @cs: One string
60 * @ct: Another string
61 */
strcmp(const char * cs,const char * ct)62 int strcmp(const char * cs,const char * ct)
63 {
64 register signed char __res;
65
66 while (1) {
67 if ((__res = *cs - *ct++) != 0 || !*cs++)
68 break;
69 }
70
71 return __res;
72 }
73