1 /*
2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include "port_before.h"
35
36 #include <sys/param.h>
37 #include <sys/types.h>
38 #include <sys/cdefs.h>
39
40 #include <string.h>
41
42 #include "port_after.h"
43
44 #ifndef NEED_STRCASECMP
45 int __strcasecmp_unneeded__;
46 #else
47
48 /*%
49 * This array is designed for mapping upper and lower case letter
50 * together for a case independent comparison. The mappings are
51 * based upon ascii character sequences.
52 */
53 static const u_char charmap[] = {
54 0000, 0001, 0002, 0003, 0004, 0005, 0006, 0007,
55 0010, 0011, 0012, 0013, 0014, 0015, 0016, 0017,
56 0020, 0021, 0022, 0023, 0024, 0025, 0026, 0027,
57 0030, 0031, 0032, 0033, 0034, 0035, 0036, 0037,
58 0040, 0041, 0042, 0043, 0044, 0045, 0046, 0047,
59 0050, 0051, 0052, 0053, 0054, 0055, 0056, 0057,
60 0060, 0061, 0062, 0063, 0064, 0065, 0066, 0067,
61 0070, 0071, 0072, 0073, 0074, 0075, 0076, 0077,
62 0100, 0141, 0142, 0143, 0144, 0145, 0146, 0147,
63 0150, 0151, 0152, 0153, 0154, 0155, 0156, 0157,
64 0160, 0161, 0162, 0163, 0164, 0165, 0166, 0167,
65 0170, 0171, 0172, 0133, 0134, 0135, 0136, 0137,
66 0140, 0141, 0142, 0143, 0144, 0145, 0146, 0147,
67 0150, 0151, 0152, 0153, 0154, 0155, 0156, 0157,
68 0160, 0161, 0162, 0163, 0164, 0165, 0166, 0167,
69 0170, 0171, 0172, 0173, 0174, 0175, 0176, 0177,
70 0200, 0201, 0202, 0203, 0204, 0205, 0206, 0207,
71 0210, 0211, 0212, 0213, 0214, 0215, 0216, 0217,
72 0220, 0221, 0222, 0223, 0224, 0225, 0226, 0227,
73 0230, 0231, 0232, 0233, 0234, 0235, 0236, 0237,
74 0240, 0241, 0242, 0243, 0244, 0245, 0246, 0247,
75 0250, 0251, 0252, 0253, 0254, 0255, 0256, 0257,
76 0260, 0261, 0262, 0263, 0264, 0265, 0266, 0267,
77 0270, 0271, 0272, 0273, 0274, 0275, 0276, 0277,
78 0300, 0301, 0302, 0303, 0304, 0305, 0306, 0307,
79 0310, 0311, 0312, 0313, 0314, 0315, 0316, 0317,
80 0320, 0321, 0322, 0323, 0324, 0325, 0326, 0327,
81 0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337,
82 0340, 0341, 0342, 0343, 0344, 0345, 0346, 0347,
83 0350, 0351, 0352, 0353, 0354, 0355, 0356, 0357,
84 0360, 0361, 0362, 0363, 0364, 0365, 0366, 0367,
85 0370, 0371, 0372, 0373, 0374, 0375, 0376, 0377
86 };
87
88 int
strcasecmp(const char * s1,const char * s2)89 strcasecmp(const char *s1, const char *s2) {
90 const u_char *cm = charmap,
91 *us1 = (const u_char *)s1,
92 *us2 = (const u_char *)s2;
93
94 while (cm[*us1] == cm[*us2++])
95 if (*us1++ == '\0')
96 return (0);
97 return (cm[*us1] - cm[*--us2]);
98 }
99
100 int
strncasecmp(const char * s1,const char * s2,size_t n)101 strncasecmp(const char *s1, const char *s2, size_t n) {
102 if (n != 0) {
103 const u_char *cm = charmap,
104 *us1 = (const u_char *)s1,
105 *us2 = (const u_char *)s2;
106
107 do {
108 if (cm[*us1] != cm[*us2++])
109 return (cm[*us1] - cm[*--us2]);
110 if (*us1++ == '\0')
111 break;
112 } while (--n != 0);
113 }
114 return (0);
115 }
116
117 #endif /*NEED_STRCASECMP*/
118
119 /*! \file */
120