mbslen_s.cpp File Reference

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

Include dependency graph for mbslen_s.cpp:

Go to the source code of this file.

Functions
size_t __cdecl	_mbsnlen_l (const unsigned char *s, size_t sizeInBytes, _locale_t plocinfo)
size_t __cdecl	_mbsnlen (const unsigned char *s, size_t maxsize)

Function Documentation

_mbsnlen()

size_t __cdecl _mbsnlen	(	const unsigned char *	s,
		size_t	maxsize
	)

Definition at line 78 of file mbslen_s.cpp.

{
    return _mbsnlen_l(s,maxsize, nullptr);
}

_mbsnlen_l()

size_t __cdecl _mbsnlen_l	(	const unsigned char *	s,
		size_t	sizeInBytes,
		_locale_t	plocinfo
	)

Definition at line 42 of file mbslen_s.cpp.

{
        size_t n, size;
        _LocaleUpdate _loc_update(plocinfo);
 
        if (_loc_update.GetLocaleT()->mbcinfo->ismbcodepage == 0)
            return strnlen((const char *)s, sizeInBytes);
 
        /* Note that we do not check if s == nullptr, because we do not
         * return errno_t...
         */
 
        /* Note that sizeInBytes here is the number of bytes, not mb characters! */
        for (n = 0, size = 0; size < sizeInBytes && *s; n++, s++, size++)
        {
            if ( _ismbblead_l(*s, _loc_update.GetLocaleT()) )
                        {
                                size++;
                                if (size >= sizeInBytes)
                                {
                                        break;
                                }
                if (*++s == '\0')
                                {
                    break;
                                }
            }
        }
 
                return (size >= sizeInBytes ? sizeInBytes : n);
}

Referenced by _mbsnlen().