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Reactos
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105/****wcsncoll.c - Collate wide-character locale strings** Copyright (c) Microsoft Corporation. All rights reserved.**Purpose:* Compare two wchar_t strings using the locale LC_COLLATE information.* Compares at most n characters of two strings.********************************************************************************/#include <corecrt_internal.h>#include <ctype.h>#include <locale.h>#include <string.h>
/****int _wcsncoll() - Collate wide-character locale strings**Purpose:* Compare two wchar_t strings using the locale LC_COLLATE information* Compares at most n characters of two strings.* In the C locale, _wcsncmp() is used to make the comparison.**Entry:* const wchar_t *s1 = pointer to the first string* const wchar_t *s2 = pointer to the second string* size_t count - maximum number of characters to compare**Exit:* -1 = first string less than second string* 0 = strings are equal* 1 = first string greater than second string* Returns _NLSCMPERROR is something went wrong* This range of return values may differ from other *cmp/*coll functions.**Exceptions:* Input parameters are validated. Refer to the validation section of the function.********************************************************************************/
extern "C" int __cdecl _wcsncoll_l ( const wchar_t *_string1, const wchar_t *_string2, size_t count, _locale_t plocinfo ){ int ret;
if (!count) { return 0; }
_LocaleUpdate _loc_update(plocinfo);
/* validation section */ _VALIDATE_RETURN(_string1 != nullptr, EINVAL, _NLSCMPERROR); _VALIDATE_RETURN(_string2 != nullptr, EINVAL, _NLSCMPERROR); _VALIDATE_RETURN(count <= INT_MAX, EINVAL, _NLSCMPERROR);
if ( _loc_update.GetLocaleT()->locinfo->locale_name[LC_COLLATE] == nullptr ) { return wcsncmp(_string1, _string2, count); }
if ( 0 == (ret = __acrt_CompareStringW( _loc_update.GetLocaleT()->locinfo->locale_name[LC_COLLATE], SORT_STRINGSORT, _string1, (int)count, _string2, (int)count)) ) { errno = EINVAL; return _NLSCMPERROR; }
return (ret - 2);
}
extern "C" int __cdecl _wcsncoll ( const wchar_t *_string1, const wchar_t *_string2, size_t count ){ if (!__acrt_locale_changed()) {
/* validation section */ _VALIDATE_RETURN(_string1 != nullptr, EINVAL, _NLSCMPERROR); _VALIDATE_RETURN(_string2 != nullptr, EINVAL, _NLSCMPERROR); _VALIDATE_RETURN(count <= INT_MAX, EINVAL, _NLSCMPERROR); return wcsncmp(_string1, _string2, count); } else { return _wcsncoll_l(_string1, _string2, count, nullptr); }
}