strncoll.cpp File Reference

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

Include dependency graph for strncoll.cpp:

Go to the source code of this file.

Functions
int __cdecl	_strncoll_l (const char *_string1, const char *_string2, size_t count, _locale_t plocinfo)
int __cdecl	_strncoll (const char *_string1, const char *_string2, size_t count)

Function Documentation

_strncoll()

int __cdecl _strncoll	(	const char *	_string1,
		const char *	_string2,
		size_t	count
	)

Definition at line 79 of file strncoll.cpp.

{
    if (!__acrt_locale_changed())
    {
        /* validation section */
        _VALIDATE_RETURN(_string1 != nullptr, EINVAL, _NLSCMPERROR);
        _VALIDATE_RETURN(_string2 != nullptr, EINVAL, _NLSCMPERROR);
        _VALIDATE_RETURN(count <= INT_MAX, EINVAL, _NLSCMPERROR);
 
        return strncmp(_string1, _string2, count);
    }
    else
    {
        return _strncoll_l(_string1, _string2, count, nullptr);
    }
}

_strncoll_l()

int __cdecl _strncoll_l	(	const char *	_string1,
		const char *	_string2,
		size_t	count,
		_locale_t	plocinfo
	)

Definition at line 38 of file strncoll.cpp.

{
    int ret;
 
    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);
 
    _LocaleUpdate _loc_update(plocinfo);
 
    if ( _loc_update.GetLocaleT()->locinfo->locale_name[LC_COLLATE] == nullptr )
    {
        return strncmp(_string1, _string2, count);
    }
 
    if ( 0 == (ret = __acrt_CompareStringA(
                    _loc_update.GetLocaleT(),
                    _loc_update.GetLocaleT()->locinfo->locale_name[LC_COLLATE],
                    SORT_STRINGSORT,
                    _string1,
                    (int)count,
                    _string2,
                    (int)count,
                    _loc_update.GetLocaleT()->locinfo->lc_collate_cp)) )
    {
        errno = EINVAL;
        return _NLSCMPERROR;
    }
 
    return (ret - 2);
}

Referenced by _mbsnbcoll_l(), _mbsncoll_l(), and _strncoll().