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Reactos
1/***
2*strnicoll.c - Collate locale strings without regard to case
3*
4* Copyright (c) Microsoft Corporation. All rights reserved.
5*
6*Purpose:
7* Compare two strings using the locale LC_COLLATE information.
8* Compares at most n characters of two strings.
9*
10*******************************************************************************/
11#include <corecrt_internal.h>
12#include <ctype.h>
13#include <locale.h>
14#include <string.h>
15
16
17/***
18*int _strnicoll() - Collate locale strings without regard to case
19*
20*Purpose:
21* Compare two strings using the locale LC_COLLATE information
22* without regard to case.
23* Compares at most n characters of two strings.
24*
25*Entry:
26* const char *s1 = pointer to the first string
27* const char *s2 = pointer to the second string
28* size_t count - maximum number of characters to compare
29*
30*Exit:
31* Less than 0 = first string less than second string
32* 0 = strings are equal
33* Greater than 0 = first string greater than second string
34* Returns _NLSCMPERROR is something went wrong
35*
36*Exceptions:
37* Input parameters are validated. Refer to the validation section of the function.
38*
39*******************************************************************************/
40
41extern "C" int __cdecl _strnicoll_l (
42 const char *_string1,
43 const char *_string2,
44 size_t count,
45 _locale_t plocinfo
46 )
47{
48 int ret;
49 _LocaleUpdate _loc_update(plocinfo);
50
51 if (!count)
52 return 0;
53
54 /* validation section */
55 _VALIDATE_RETURN(_string1 != nullptr, EINVAL, _NLSCMPERROR);
56 _VALIDATE_RETURN(_string2 != nullptr, EINVAL, _NLSCMPERROR);
57 _VALIDATE_RETURN(count <= INT_MAX, EINVAL, _NLSCMPERROR);
58
59 if ( _loc_update.GetLocaleT()->locinfo->locale_name[LC_COLLATE] == nullptr )
60 return _strnicmp_l(_string1, _string2, count, _loc_update.GetLocaleT());
61
62 if ( 0 == (ret = __acrt_CompareStringA(
63 _loc_update.GetLocaleT(),
64 _loc_update.GetLocaleT()->locinfo->locale_name[LC_COLLATE],
65 SORT_STRINGSORT | NORM_IGNORECASE,
66 _string1,
67 (int)count,
68 _string2,
69 (int)count,
70 _loc_update.GetLocaleT()->locinfo->lc_collate_cp)) )
71 {
72 errno = EINVAL;
73 return _NLSCMPERROR;
74 }
75
76 return (ret - 2);
77}
78
79extern "C" int __cdecl _strnicoll (
80 const char *_string1,
81 const char *_string2,
82 size_t count
83 )
84{
85 if (!__acrt_locale_changed())
86 {
87 return _strnicmp(_string1, _string2, count);
88 }
89 else
90 {
91 return _strnicoll_l(_string1, _string2, count, nullptr);
92 }
93}