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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687/****mbsnbcol.c - Collate n bytes of two MBCS strings** Copyright (c) Microsoft Corporation. All rights reserved.**Purpose:* Collate n bytes of two MBCS strings********************************************************************************/#ifndef _MBCS #error This file should only be compiled with _MBCS defined#endif
#include <corecrt_internal_mbstring.h>#include <limits.h>#include <locale.h>#include <string.h>
/**** _mbsnbcoll(s1, s2, n) - Collate n bytes of two MBCS strings**Purpose:* Collates up to n bytes of two strings for lexical order.**Entry:* unsigned char *s1, *s2 = strings to collate* size_t n = maximum number of bytes to collate**Exit:* Returns <0 if s1 < s2* Returns 0 if s1 == s2* Returns >0 if s1 > s2* Returns _NLSCMPERROR is something went wrong**Exceptions:* Input parameters are validated. Refer to the validation section of the function.********************************************************************************/
extern "C" int __cdecl _mbsnbcoll_l( const unsigned char *s1, const unsigned char *s2, size_t n, _locale_t plocinfo ){ int ret;
if (n == 0) return 0;
/* validation section */ _VALIDATE_RETURN(s1 != nullptr, EINVAL, _NLSCMPERROR); _VALIDATE_RETURN(s2 != nullptr, EINVAL, _NLSCMPERROR); _VALIDATE_RETURN(n <= INT_MAX, EINVAL, _NLSCMPERROR);
_LocaleUpdate _loc_update(plocinfo);
if (_loc_update.GetLocaleT()->mbcinfo->ismbcodepage == 0) return _strncoll_l((const char *)s1, (const char *)s2, n, plocinfo);
if ( 0 == (ret = __acrt_CompareStringA(_loc_update.GetLocaleT(), _loc_update.GetLocaleT()->mbcinfo->mblocalename, SORT_STRINGSORT, (const char *)s1, (int)n, (char *)s2, (int)n, _loc_update.GetLocaleT()->mbcinfo->mbcodepage )) ) { errno = EINVAL; return _NLSCMPERROR; }
return ret - 2;
}
extern "C" int (__cdecl _mbsnbcoll)( const unsigned char *s1, const unsigned char *s2, size_t n ){ return _mbsnbcoll_l(s1, s2, n, nullptr);}