strnicmp.cpp File Reference

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

Include dependency graph for strnicmp.cpp:

Go to the source code of this file.

Functions
int __cdecl	_strnicmp_l (char const *const lhs, char const *const rhs, size_t const count, _locale_t const plocinfo)
int __cdecl	__ascii_strnicmp (char const *const lhs, char const *const rhs, size_t const count)
int __cdecl	_strnicmp (char const *const lhs, char const *const rhs, size_t const count)

Function Documentation

__ascii_strnicmp()

int __cdecl __ascii_strnicmp	(	char const *const	lhs,
		char const *const	rhs,
		size_t const	count
	)

Definition at line 81 of file strnicmp.cpp.

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

Referenced by _strnicmp().

_strnicmp()

int __cdecl _strnicmp	(	char const *const	lhs,
		char const *const	rhs,
		size_t const	count
	)

Definition at line 112 of file strnicmp.cpp.

{
    if (!__acrt_locale_changed())
    {
        /* validation section */
        _VALIDATE_RETURN(lhs != nullptr, EINVAL, _NLSCMPERROR);
        _VALIDATE_RETURN(rhs != nullptr, EINVAL, _NLSCMPERROR);
        _VALIDATE_RETURN(count <= INT_MAX, EINVAL, _NLSCMPERROR);
 
        return __ascii_strnicmp(lhs, rhs, count);
    }
 
    return _strnicmp_l(lhs, rhs, count, nullptr);
}

_strnicmp_l()

int __cdecl _strnicmp_l	(	char const *const	lhs,
		char const *const	rhs,
		size_t const	count,
		_locale_t const	plocinfo
	)

Definition at line 41 of file strnicmp.cpp.

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

Referenced by _strnicmp().