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Reactos
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113/****wcsicmp.cpp - contains case-insensitive wide string comp routine _wcsicmp** Copyright (c) Microsoft Corporation. All rights reserved.**Purpose:* contains _wcsicmp()********************************************************************************/#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 _wcsicmp(lhs, rhs) - compare wide-character strings, ignore case**Purpose:* _wcsicmp performs a case-insensitive wchar_t string comparision.* _wcsicmp is independent of locale.**Entry:* wchar_t *lhs, *rhs - strings to compare**Return:* Returns <0 if lhs < rhs* Returns 0 if lhs = rhs* Returns >0 if lhs > rhs* Returns _NLSCMPERROR if 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 _wcsicmp_l ( wchar_t const * const lhs, wchar_t const * const rhs, _locale_t const plocinfo ){ /* validation section */ _VALIDATE_RETURN(lhs != nullptr, EINVAL, _NLSCMPERROR); _VALIDATE_RETURN(rhs != nullptr, EINVAL, _NLSCMPERROR);
_LocaleUpdate _loc_update(plocinfo);
// This check is still worth doing for wide but not narrow because // we need to consult the UTF-16 ctype map for towlower operations. if (_loc_update.GetLocaleT()->locinfo->locale_name[LC_CTYPE] == nullptr) { return __ascii_wcsicmp(lhs, rhs); }
unsigned short const * lhs_ptr = reinterpret_cast<unsigned short const *>(lhs); unsigned short const * rhs_ptr = reinterpret_cast<unsigned short const *>(rhs);
int result; int lhs_value; int rhs_value; do { lhs_value = _towlower_internal(*lhs_ptr++, _loc_update.GetLocaleT()); rhs_value = _towlower_internal(*rhs_ptr++, _loc_update.GetLocaleT()); result = lhs_value - rhs_value; } while (result == 0 && lhs_value != 0);
return result;}
extern "C" int __cdecl __ascii_wcsicmp( wchar_t const * const lhs, wchar_t const * const rhs ){ unsigned short const * lhs_ptr = reinterpret_cast<unsigned short const *>(lhs); unsigned short const * rhs_ptr = reinterpret_cast<unsigned short const *>(rhs);
int result; int lhs_value; int rhs_value; do { lhs_value = __ascii_towlower(*lhs_ptr++); rhs_value = __ascii_towlower(*rhs_ptr++); result = lhs_value - rhs_value; } while (result == 0 && lhs_value != 0);
return result;}
extern "C" int __cdecl _wcsicmp( wchar_t const * const lhs, wchar_t const * const rhs ){ if (!__acrt_locale_changed()) { /* validation section */ _VALIDATE_RETURN(lhs != nullptr, EINVAL, _NLSCMPERROR); _VALIDATE_RETURN(rhs != nullptr, EINVAL, _NLSCMPERROR);
return __ascii_wcsicmp(lhs, rhs); }
return _wcsicmp_l(lhs, rhs, nullptr);}