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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394/****strnicoll.c - Collate locale strings without regard to case** Copyright (c) Microsoft Corporation. All rights reserved.**Purpose:* Compare two 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 _strnicoll() - Collate locale strings without regard to case**Purpose:* Compare two strings using the locale LC_COLLATE information* without regard to case.* Compares at most n characters of two strings.**Entry:* const char *s1 = pointer to the first string* const char *s2 = pointer to the second string* size_t count - maximum number of characters to compare**Exit:* Less than 0 = first string less than second string* 0 = strings are equal* Greater than 0 = first string greater than second string* Returns _NLSCMPERROR is something went wrong**Exceptions:* Input parameters are validated. Refer to the validation section of the function.********************************************************************************/
extern "C" int __cdecl _strnicoll_l ( const char *_string1, const char *_string2, size_t count, _locale_t plocinfo ){ int ret; _LocaleUpdate _loc_update(plocinfo);
if (!count) return 0;
/* 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 _strnicmp_l(_string1, _string2, count, _loc_update.GetLocaleT());
if ( 0 == (ret = __acrt_CompareStringA( _loc_update.GetLocaleT(), _loc_update.GetLocaleT()->locinfo->locale_name[LC_COLLATE], SORT_STRINGSORT | NORM_IGNORECASE, _string1, (int)count, _string2, (int)count, _loc_update.GetLocaleT()->locinfo->lc_collate_cp)) ) { errno = EINVAL; return _NLSCMPERROR; }
return (ret - 2);}
extern "C" int __cdecl _strnicoll ( const char *_string1, const char *_string2, size_t count ){ if (!__acrt_locale_changed()) { return _strnicmp(_string1, _string2, count); } else { return _strnicoll_l(_string1, _string2, count, nullptr); }}