memicmp.cpp File Reference

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

Include dependency graph for memicmp.cpp:

Go to the source code of this file.

Functions
int __cdecl	_memicmp_l (void const *const lhs, void const *const rhs, size_t const count, _locale_t const plocinfo)
int __cdecl	__ascii_memicmp (void const *const lhs, void const *const rhs, size_t const count)
int __cdecl	_memicmp (void const *const lhs, void const *const rhs, size_t const count)

Function Documentation

__ascii_memicmp()

int __cdecl __ascii_memicmp	(	void const *const	lhs,
		void const *const	rhs,
		size_t const	count
	)

Definition at line 77 of file memicmp.cpp.

{
    if (count == 0)
    {
        return 0;
    }
 
    unsigned char const * lhs_ptr = static_cast<unsigned char const *>(lhs);
    unsigned char const * rhs_ptr = static_cast<unsigned char const *>(rhs);
 
    int result;
    size_t remaining = count;
    do
    {
        result = __ascii_tolower(*lhs_ptr++) - __ascii_tolower(*rhs_ptr++);
    }
    while (result == 0 && --remaining != 0);
 
    return result;
}

Referenced by _memicmp().

_memicmp()

int __cdecl _memicmp	(	void const *const	lhs,
		void const *const	rhs,
		size_t const	count
	)

Definition at line 104 of file memicmp.cpp.

{
    if (!__acrt_locale_changed())
    {
        /* validation section */
        _VALIDATE_RETURN(lhs != nullptr || count == 0, EINVAL, _NLSCMPERROR);
        _VALIDATE_RETURN(rhs != nullptr || count == 0, EINVAL, _NLSCMPERROR);
 
        return __ascii_memicmp(lhs, rhs, count);
    }
 
    return _memicmp_l(lhs, rhs, count, nullptr);
}

_memicmp_l()

int __cdecl _memicmp_l	(	void const *const	lhs,
		void const *const	rhs,
		size_t const	count,
		_locale_t const	plocinfo
	)

Definition at line 41 of file memicmp.cpp.

{
    /* validation section */
    _VALIDATE_RETURN(lhs != nullptr || count == 0, EINVAL, _NLSCMPERROR);
    _VALIDATE_RETURN(rhs != nullptr || count == 0, EINVAL, _NLSCMPERROR);
 
    if (count == 0)
    {
        return 0;
    }
 
    unsigned char const * lhs_ptr = static_cast<unsigned char const *>(lhs);
    unsigned char const * rhs_ptr = static_cast<unsigned char const *>(rhs);
 
    _LocaleUpdate _loc_update(plocinfo);
 
    int result;
    size_t remaining = count;
    do
    {
        result = _tolower_fast_internal(*lhs_ptr++, _loc_update.GetLocaleT())
            - _tolower_fast_internal(*rhs_ptr++, _loc_update.GetLocaleT());
    }
    while (result == 0 && --remaining != 0);
 
    return result;
}

Referenced by _memicmp().