1/* strcasecmp.c - functions for case-insensitive string comparison. */
2
3/* Copyright (C) 1995 Free Software Foundation, Inc.
4
5   This file is part of GNU Bash, the Bourne Again SHell.
6
7   Bash is free software: you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation, either version 3 of the License, or
10   (at your option) any later version.
11
12   Bash is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with Bash.  If not, see <http://www.gnu.org/licenses/>.
19*/
20
21#include <config.h>
22
23#if !defined (HAVE_STRCASECMP)
24
25#include <stdc.h>
26#include <bashansi.h>
27#include <chartypes.h>
28
29/* Compare at most COUNT characters from string1 to string2.  Case
30   doesn't matter. */
31int
32strncasecmp (string1, string2, count)
33     const char *string1;
34     const char *string2;
35     int count;
36{
37  register const char *s1;
38  register const char *s2;
39  register int r;
40
41  if (count <= 0 || (string1 == string2))
42    return 0;
43
44  s1 = string1;
45  s2 = string2;
46  do
47    {
48      if ((r = TOLOWER ((unsigned char) *s1) - TOLOWER ((unsigned char) *s2)) != 0)
49	return r;
50      if (*s1++ == '\0')
51	break;
52      s2++;
53    }
54  while (--count != 0);
55
56  return (0);
57}
58
59/* strcmp (), but caseless. */
60int
61strcasecmp (string1, string2)
62     const char *string1;
63     const char *string2;
64{
65  register const char *s1;
66  register const char *s2;
67  register int r;
68
69  s1 = string1;
70  s2 = string2;
71
72  if (s1 == s2)
73    return (0);
74
75  while ((r = TOLOWER ((unsigned char)*s1) - TOLOWER ((unsigned char)*s2)) == 0)
76    {
77      if (*s1++ == '\0')
78	return 0;
79      s2++;
80    }
81
82  return (r);
83}
84#endif /* !HAVE_STRCASECMP */
85