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Reactos
1/***
2*mbsnbcol.c - Collate n bytes of two MBCS strings
3*
4* Copyright (c) Microsoft Corporation. All rights reserved.
5*
6*Purpose:
7* Collate n bytes of two MBCS strings
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* _mbsnbcoll(s1, s2, n) - Collate n bytes of two MBCS strings
21*
22*Purpose:
23* Collates up to n bytes of two strings for lexical order.
24*
25*Entry:
26* unsigned char *s1, *s2 = strings to collate
27* size_t n = maximum number of bytes to collate
28*
29*Exit:
30* Returns <0 if s1 < s2
31* Returns 0 if s1 == s2
32* Returns >0 if s1 > s2
33* Returns _NLSCMPERROR is something went wrong
34*
35*Exceptions:
36* Input parameters are validated. Refer to the validation section of the function.
37*
38*******************************************************************************/
39
40extern "C" int __cdecl _mbsnbcoll_l(
41 const unsigned char *s1,
42 const unsigned char *s2,
43 size_t n,
44 _locale_t plocinfo
45 )
46{
47 int ret;
48
49 if (n == 0)
50 return 0;
51
52 /* validation section */
53 _VALIDATE_RETURN(s1 != nullptr, EINVAL, _NLSCMPERROR);
54 _VALIDATE_RETURN(s2 != nullptr, EINVAL, _NLSCMPERROR);
55 _VALIDATE_RETURN(n <= INT_MAX, EINVAL, _NLSCMPERROR);
56
57 _LocaleUpdate _loc_update(plocinfo);
58
59 if (_loc_update.GetLocaleT()->mbcinfo->ismbcodepage == 0)
60 return _strncoll_l((const char *)s1, (const char *)s2, n, plocinfo);
61
62 if ( 0 == (ret = __acrt_CompareStringA(_loc_update.GetLocaleT(),
63 _loc_update.GetLocaleT()->mbcinfo->mblocalename,
64 SORT_STRINGSORT,
65 (const char *)s1,
66 (int)n,
67 (char *)s2,
68 (int)n,
69 _loc_update.GetLocaleT()->mbcinfo->mbcodepage )) )
70 {
71 errno = EINVAL;
72 return _NLSCMPERROR;
73 }
74
75 return ret - 2;
76
77}
78
79extern "C" int (__cdecl _mbsnbcoll)(
80 const unsigned char *s1,
81 const unsigned char *s2,
82 size_t n
83 )
84{
85 return _mbsnbcoll_l(s1, s2, n, nullptr);
86}