wcsnicmp.cpp File Reference

#include <corecrt_internal.h>
#include <ctype.h>
#include <corecrt_internal_securecrt.h>
#include <locale.h>
#include <string.h>

Include dependency graph for wcsnicmp.cpp:

Go to the source code of this file.

Functions
int __cdecl	_wcsnicmp_l (wchar_t const *const lhs, wchar_t const *const rhs, size_t const count, _locale_t const plocinfo)
int __cdecl	__ascii_wcsnicmp (wchar_t const *const lhs, wchar_t const *const rhs, size_t const count)
int __cdecl	_wcsnicmp (wchar_t const *const lhs, wchar_t const *const rhs, size_t const count)

Function Documentation

__ascii_wcsnicmp()

int __cdecl __ascii_wcsnicmp	(	wchar_t const *const	lhs,
		wchar_t const *const	rhs,
		size_t const	count
	)

Definition at line 87 of file wcsnicmp.cpp.

{
    if (count == 0)
    {
        return 0;
    }
 
    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;
    size_t remaining = count;
    do
    {
        lhs_value = __ascii_towlower(*lhs_ptr++);
        rhs_value = __ascii_towlower(*rhs_ptr++);
        result = lhs_value - rhs_value;
    }
    while (result == 0 && lhs_value != 0 && --remaining != 0);
 
    return result;
}

Referenced by _wcsnicmp(), and _wcsnicmp_l().

_wcsnicmp()

int __cdecl _wcsnicmp	(	wchar_t const *const	lhs,
		wchar_t const *const	rhs,
		size_t const	count
	)

Definition at line 116 of file wcsnicmp.cpp.

{
    if (!__acrt_locale_changed())
    {
        /* validation section */
        _VALIDATE_RETURN(lhs != nullptr, EINVAL, _NLSCMPERROR);
        _VALIDATE_RETURN(rhs != nullptr, EINVAL, _NLSCMPERROR);
 
        return __ascii_wcsnicmp(lhs, rhs, count);
    }
 
    return _wcsnicmp_l(lhs, rhs, count, nullptr);
}

_wcsnicmp_l()

int __cdecl _wcsnicmp_l	(	wchar_t const *const	lhs,
		wchar_t const *const	rhs,
		size_t const	count,
		_locale_t const	plocinfo
	)

Definition at line 44 of file wcsnicmp.cpp.

{
    /* validation section */
    _VALIDATE_RETURN(lhs != nullptr, EINVAL, _NLSCMPERROR);
    _VALIDATE_RETURN(rhs != nullptr, EINVAL, _NLSCMPERROR);
 
    if (count == 0)
    {
        return 0;
    }
 
    _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_wcsnicmp(lhs, rhs, count);
    }
 
    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;
    size_t remaining = count;
    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 && --remaining != 0);
 
    return result;
}

Referenced by _wcsnicmp().