mbsncpy.cpp File Reference

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

Include dependency graph for mbsncpy.cpp:

Go to the source code of this file.

Functions
unsigned char *__cdecl	_mbsncpy_l (unsigned char *dst, const unsigned char *src, size_t cnt, _locale_t plocinfo)
unsigned char *__cdecl	_mbsncpy (unsigned char *dst, const unsigned char *src, size_t cnt)

Function Documentation

_mbsncpy()

unsigned char *__cdecl _mbsncpy	(	unsigned char *	dst,
		const unsigned char *	src,
		size_t	cnt
	)

Definition at line 87 of file mbsncpy.cpp.

{
    _BEGIN_SECURE_CRT_DEPRECATION_DISABLE
    return _mbsncpy_l(dst, src, cnt, nullptr);
    _END_SECURE_CRT_DEPRECATION_DISABLE
}

_mbsncpy_l()

unsigned char *__cdecl _mbsncpy_l	(	unsigned char *	dst,
		const unsigned char *	src,
		size_t	cnt,
		_locale_t	plocinfo
	)

Definition at line 43 of file mbsncpy.cpp.

{
        unsigned char *start = dst;
        _LocaleUpdate _loc_update(plocinfo);
 
        /* validation section */
        _VALIDATE_RETURN(dst != nullptr || cnt == 0, EINVAL, nullptr);
        _VALIDATE_RETURN(src != nullptr || cnt == 0, EINVAL, nullptr);
 
        _BEGIN_SECURE_CRT_DEPRECATION_DISABLE
        if (_loc_update.GetLocaleT()->mbcinfo->ismbcodepage == 0)
#pragma warning(suppress:__WARNING_BANNED_API_USAGE)
            return (unsigned char *)strncpy((char *)dst, (const char *)src, cnt);
        _END_SECURE_CRT_DEPRECATION_DISABLE
 
        while (cnt) {
 
            cnt--;
            if ( _ismbblead_l(*src, _loc_update.GetLocaleT()) ) {
                *dst++ = *src++;
                if ((*dst++ = *src++) == '\0') {
                    dst[-2] = '\0';
                    break;
                }
            }
            else
                if ((*dst++ = *src++) == '\0')
                    break;
 
        }
 
        /* pad with nulls as needed */
 
        while (cnt--)
            *dst++ = '\0';
 
#pragma warning(suppress:__WARNING_POSTCONDITION_NULLTERMINATION_VIOLATION) // 26036 REVIEW annotation mistake?
        return start;
}

Referenced by _mbsncpy().