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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394/****wcsicoll.c - Collate wide-character locale strings without regard to case** Copyright (c) Microsoft Corporation. All rights reserved.**Purpose:* Compare two wchar_t strings using the locale LC_COLLATE information* without regard to case.********************************************************************************/#include <corecrt_internal.h>#include <ctype.h>#include <locale.h>#include <string.h>
#pragma warning(disable:__WARNING_POTENTIAL_BUFFER_OVERFLOW_NULLTERMINATED) // 26018 Prefast can't see that we are checking for terminal nul.
/****int _wcsicoll() - Collate wide-character locale strings without regard to case**Purpose:* Compare two wchar_t strings using the locale LC_COLLATE information* without regard to case.* In the C locale, _wcsicmp() 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**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 _wcsicoll_l ( const wchar_t *_string1, const wchar_t *_string2, _locale_t plocinfo ){ int ret; _LocaleUpdate _loc_update(plocinfo);
/* validation section */ _VALIDATE_RETURN(_string1 != nullptr, EINVAL, _NLSCMPERROR ); _VALIDATE_RETURN(_string2 != nullptr, EINVAL, _NLSCMPERROR );
if ( _loc_update.GetLocaleT()->locinfo->locale_name[LC_COLLATE] == nullptr ) { return __ascii_wcsicmp(_string1, _string2); }
if ( 0 == (ret = __acrt_CompareStringW( _loc_update.GetLocaleT()->locinfo->locale_name[LC_COLLATE], SORT_STRINGSORT | NORM_IGNORECASE, _string1, -1, _string2, -1)) ) { errno = EINVAL; return _NLSCMPERROR; }
return (ret - 2);}
extern "C" int __cdecl _wcsicoll ( const wchar_t *_string1, const wchar_t *_string2 ){ if (!__acrt_locale_changed()) { /* validation section */ _VALIDATE_RETURN(_string1 != nullptr, EINVAL, _NLSCMPERROR ); _VALIDATE_RETURN(_string2 != nullptr, EINVAL, _NLSCMPERROR );
return __ascii_wcsicmp(_string1, _string2); } else { return _wcsicoll_l(_string1, _string2, nullptr); }
}