1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                  Common Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*            http://www.opensource.org/licenses/cpl1.0.txt             *
11*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*                                                                      *
13*              Information and Software Systems Research               *
14*                            AT&T Research                             *
15*                           Florham Park NJ                            *
16*                                                                      *
17*                 Glenn Fowler <gsf@research.att.com>                  *
18*                  David Korn <dgk@research.att.com>                   *
19*                   Phong Vo <kpv@research.att.com>                    *
20*                                                                      *
21***********************************************************************/
22#pragma prototyped
23
24#include <ast.h>
25
26#if _lib_strncasecmp
27
28NoN(strncasecmp)
29
30#else
31
32#include <ctype.h>
33
34#undef	strncasecmp
35
36int
37strncasecmp(register const char* a, register const char* b, size_t n)
38{
39	register const char*	e;
40	register int		ac;
41	register int		bc;
42	register int		d;
43
44	e = a + n;
45	for (;;)
46	{
47		if (a >= e)
48			return 0;
49		ac = *a++;
50		if (isupper(ac))
51			ac = tolower(ac);
52		bc = *b++;
53		if (isupper(bc))
54			bc = tolower(bc);
55		if (d = ac - bc)
56			return d;
57		if (!ac)
58			return 0;
59	}
60}
61
62#endif
63