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1 
2 
3 /* Copyright 1998 by the Massachusetts Institute of Technology.
4  *
5  * Permission to use, copy, modify, and distribute this
6  * software and its documentation for any purpose and without
7  * fee is hereby granted, provided that the above copyright
8  * notice appear in all copies and that both that copyright
9  * notice and this permission notice appear in supporting
10  * documentation, and that the name of M.I.T. not be used in
11  * advertising or publicity pertaining to distribution of the
12  * software without specific, written prior permission.
13  * M.I.T. makes no representations about the suitability of
14  * this software for any purpose.  It is provided "as is"
15  * without express or implied warranty.
16  */
17 
18 #include "ares_setup.h"
19 #include "ares_strcasecmp.h"
20 
21 #ifndef HAVE_STRCASECMP
ares_strcasecmp(const char * a,const char * b)22 int ares_strcasecmp(const char *a, const char *b)
23 {
24 #if defined(HAVE_STRCMPI)
25   return strcmpi(a, b);
26 #elif defined(HAVE_STRICMP)
27   return stricmp(a, b);
28 #else
29   size_t i;
30 
31   for (i = 0; i < (size_t)-1; i++) {
32     int c1 = ISUPPER(a[i]) ? tolower(a[i]) : a[i];
33     int c2 = ISUPPER(b[i]) ? tolower(b[i]) : b[i];
34     if (c1 != c2)
35       return c1-c2;
36     if (!c1)
37       break;
38   }
39   return 0;
40 #endif
41 }
42 #endif
43 
44 #ifndef HAVE_STRNCASECMP
ares_strncasecmp(const char * a,const char * b,size_t n)45 int ares_strncasecmp(const char *a, const char *b, size_t n)
46 {
47 #if defined(HAVE_STRNCMPI)
48   return strncmpi(a, b, n);
49 #elif defined(HAVE_STRNICMP)
50   return strnicmp(a, b, n);
51 #else
52   size_t i;
53 
54   for (i = 0; i < n; i++) {
55     int c1 = ISUPPER(a[i]) ? tolower(a[i]) : a[i];
56     int c2 = ISUPPER(b[i]) ? tolower(b[i]) : b[i];
57     if (c1 != c2)
58       return c1-c2;
59     if (!c1)
60       break;
61   }
62   return 0;
63 #endif
64 }
65 #endif
66 
67