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Reactos
1/***
2*mbsnicol.c - Collate n characters of strings, ignoring case (MBCS)
3*
4* Copyright (c) Microsoft Corporation. All rights reserved.
5*
6*Purpose:
7* Collate n characters of strings, ignoring case (MBCS)
8*
9*******************************************************************************/
10#ifndef _MBCS
11 #error This file should only be compiled with _MBCS defined
12#endif
13
14#include <corecrt_internal_mbstring.h>
15#include <limits.h>
16#include <locale.h>
17#include <string.h>
18
19
20/***
21* _mbsnicoll - Collate n characters of strings, ignoring case (MBCS)
22*
23*Purpose:
24* Collates up to n charcters of two strings for lexical order.
25* Strings are collated on a character basis, not a byte basis.
26* Case of characters is not considered.
27*
28*Entry:
29* unsigned char *s1, *s2 = strings to collate
30* size_t n = maximum number of characters to collate
31*
32*Exit:
33* Returns <0 if s1 < s2
34* Returns 0 if s1 == s2
35* Returns >0 if s1 > s2
36* Returns _NLSCMPERROR is something went wrong
37*
38*Exceptions:
39* Input parameters are validated. Refer to the validation section of the function.
40*
41*******************************************************************************/
42
43extern "C" int __cdecl _mbsnicoll_l(
44 const unsigned char *s1,
45 const unsigned char *s2,
46 size_t n,
47 _locale_t plocinfo
48 )
49{
50 int ret;
51 size_t bcnt1, bcnt2;
52 _LocaleUpdate _loc_update(plocinfo);
53
54 if (n == 0)
55 return 0;
56
57 /* validation section */
58 _VALIDATE_RETURN(s1 != nullptr, EINVAL, _NLSCMPERROR);
59 _VALIDATE_RETURN(s2 != nullptr, EINVAL, _NLSCMPERROR);
60 _VALIDATE_RETURN(n <= INT_MAX, EINVAL, _NLSCMPERROR);
61
62 if (_loc_update.GetLocaleT()->mbcinfo->ismbcodepage == 0)
63 return _strnicoll_l((const char *)s1, (const char *)s2, n, plocinfo);
64
65 bcnt1 = _mbsnbcnt_l(s1, n, _loc_update.GetLocaleT());
66 bcnt2 = _mbsnbcnt_l(s2, n, _loc_update.GetLocaleT());
67
68 if ( 0 == (ret = __acrt_CompareStringA(
69 _loc_update.GetLocaleT(),
70 _loc_update.GetLocaleT()->mbcinfo->mblocalename,
71 SORT_STRINGSORT | NORM_IGNORECASE,
72 (const char *)s1,
73 (int)bcnt1,
74 (char *)s2,
75 (int)bcnt2,
76 _loc_update.GetLocaleT()->mbcinfo->mbcodepage )) )
77 {
78 errno = EINVAL;
79 return _NLSCMPERROR;
80 }
81
82 return ret - 2;
83
84}
85
86extern "C" int (__cdecl _mbsnicoll)(
87 const unsigned char *s1,
88 const unsigned char *s2,
89 size_t n
90 )
91{
92 return _mbsnicoll_l(s1, s2, n, nullptr);
93}