1#if defined(LIBC_SCCS) && !defined(lint)
2static const char sccsid[] = "@(#)strcasecmp.c	8.1 (Berkeley) 6/4/93";
3static const char rcsid[] = "$Id: strcasecmp.c,v 1.2 2005/04/27 04:56:12 sra Exp $";
4#endif /* LIBC_SCCS and not lint */
5
6/*
7 * Copyright (c) 1987, 1993
8 *    The Regents of the University of California.  All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 * 	This product includes software developed by the University of
21 * 	California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 *    may be used to endorse or promote products derived from this software
24 *    without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
38
39#include "port_before.h"
40
41#include <sys/param.h>
42#include <sys/types.h>
43#include <sys/cdefs.h>
44
45#include <string.h>
46
47#include "port_after.h"
48
49#ifndef NEED_STRCASECMP
50int __strcasecmp_unneeded__;
51#else
52
53/*%
54 * This array is designed for mapping upper and lower case letter
55 * together for a case independent comparison.  The mappings are
56 * based upon ascii character sequences.
57 */
58static const u_char charmap[] = {
59	0000, 0001, 0002, 0003, 0004, 0005, 0006, 0007,
60	0010, 0011, 0012, 0013, 0014, 0015, 0016, 0017,
61	0020, 0021, 0022, 0023, 0024, 0025, 0026, 0027,
62	0030, 0031, 0032, 0033, 0034, 0035, 0036, 0037,
63	0040, 0041, 0042, 0043, 0044, 0045, 0046, 0047,
64	0050, 0051, 0052, 0053, 0054, 0055, 0056, 0057,
65	0060, 0061, 0062, 0063, 0064, 0065, 0066, 0067,
66	0070, 0071, 0072, 0073, 0074, 0075, 0076, 0077,
67	0100, 0141, 0142, 0143, 0144, 0145, 0146, 0147,
68	0150, 0151, 0152, 0153, 0154, 0155, 0156, 0157,
69	0160, 0161, 0162, 0163, 0164, 0165, 0166, 0167,
70	0170, 0171, 0172, 0133, 0134, 0135, 0136, 0137,
71	0140, 0141, 0142, 0143, 0144, 0145, 0146, 0147,
72	0150, 0151, 0152, 0153, 0154, 0155, 0156, 0157,
73	0160, 0161, 0162, 0163, 0164, 0165, 0166, 0167,
74	0170, 0171, 0172, 0173, 0174, 0175, 0176, 0177,
75	0200, 0201, 0202, 0203, 0204, 0205, 0206, 0207,
76	0210, 0211, 0212, 0213, 0214, 0215, 0216, 0217,
77	0220, 0221, 0222, 0223, 0224, 0225, 0226, 0227,
78	0230, 0231, 0232, 0233, 0234, 0235, 0236, 0237,
79	0240, 0241, 0242, 0243, 0244, 0245, 0246, 0247,
80	0250, 0251, 0252, 0253, 0254, 0255, 0256, 0257,
81	0260, 0261, 0262, 0263, 0264, 0265, 0266, 0267,
82	0270, 0271, 0272, 0273, 0274, 0275, 0276, 0277,
83	0300, 0301, 0302, 0303, 0304, 0305, 0306, 0307,
84	0310, 0311, 0312, 0313, 0314, 0315, 0316, 0317,
85	0320, 0321, 0322, 0323, 0324, 0325, 0326, 0327,
86	0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337,
87	0340, 0341, 0342, 0343, 0344, 0345, 0346, 0347,
88	0350, 0351, 0352, 0353, 0354, 0355, 0356, 0357,
89	0360, 0361, 0362, 0363, 0364, 0365, 0366, 0367,
90	0370, 0371, 0372, 0373, 0374, 0375, 0376, 0377
91};
92
93int
94strcasecmp(const char *s1, const char *s2) {
95	const u_char *cm = charmap,
96		     *us1 = (const u_char *)s1,
97		     *us2 = (const u_char *)s2;
98
99	while (cm[*us1] == cm[*us2++])
100		if (*us1++ == '\0')
101			return (0);
102	return (cm[*us1] - cm[*--us2]);
103}
104
105int
106strncasecmp(const char *s1, const char *s2, size_t n) {
107	if (n != 0) {
108		const u_char *cm = charmap,
109			     *us1 = (const u_char *)s1,
110			     *us2 = (const u_char *)s2;
111
112		do {
113			if (cm[*us1] != cm[*us2++])
114				return (cm[*us1] - cm[*--us2]);
115			if (*us1++ == '\0')
116				break;
117		} while (--n != 0);
118	}
119	return (0);
120}
121
122#endif /*NEED_STRCASECMP*/
123
124/*! \file */
125