summaryrefslogtreecommitdiff
path: root/ace/OS_NS_strings.cpp
blob: 67ca3a809b850f9c06d7ce7dd887db97e1409bf9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
// -*- C++ -*-
// $Id$

#include "ace/OS_NS_strings.h"

ACE_RCSID(ace, OS_NS_strings, "$Id$")

#if !defined (ACE_HAS_INLINED_OSCALLS)
# include "ace/OS_NS_strings.inl"
#endif /* ACE_HAS_INLINED_OS_CALLS */

#if defined (ACE_LACKS_STRCASECMP)
#  include "ace/OS_NS_ctype.h"
#endif /* ACE_LACKS_STRCASECMP */

#if defined (ACE_LACKS_STRCASECMP)
int
ACE_OS::strcasecmp_emulation (const char *s, const char *t)
{
  const char *scan1 = s;
  const char *scan2 = t;

  while (*scan1 != 0
         && ACE_OS::ace_tolower (*scan1)
            == ACE_OS::ace_tolower (*scan2))
    {
      ++scan1;
      ++scan2;
    }

  // The following case analysis is necessary so that characters which
  // look negative collate low against normal characters but high
  // against the end-of-string NUL.

  if (*scan1 == '\0' && *scan2 == '\0')
    return 0;
  else if (*scan1 == '\0')
    return -1;
  else if (*scan2 == '\0')
    return 1;
  else
    return ACE_OS::ace_tolower (*scan1) - ACE_OS::ace_tolower (*scan2);
}
#endif /* ACE_LACKS_STRCASECMP */

#if defined (ACE_LACKS_STRCASECMP)
int
ACE_OS::strncasecmp_emulation (const char *s,
                               const char *t,
                               size_t len)
{
  const char *scan1 = s;
  const char *scan2 = t;
  size_t count = 0;

  while (count++ < len
         && *scan1 != 0
         && ACE_OS::ace_tolower (*scan1)
            == ACE_OS::ace_tolower (*scan2))
    {
      ++scan1;
      ++scan2;
    }

  if (count > len)
    return 0;

  // The following case analysis is necessary so that characters which
  // look negative collate low against normal characters but high
  // against the end-of-string NUL.

  if (*scan1 == '\0' && *scan2 == '\0')
    return 0;
  else if (*scan1 == '\0')
    return -1;
  else if (*scan2 == '\0')
    return 1;
  else
    return ACE_OS::ace_tolower (*scan1) - ACE_OS::ace_tolower (*scan2);
}
#endif /* ACE_LACKS_STRCASECMP */