mbsninc.c

来自「C标准库源代码」· C语言 代码 · 共 50 行

/***
*mbsninc.c - Increment MBCS string pointer by specified char count.
*
*       Copyright (c) 1987-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
*       Increment MBCS string pointer by specified char count.
*
*******************************************************************************/

#ifdef _MBCS

#include <cruntime.h>
#include <mbdata.h>
#include <mbstring.h>
#include <stddef.h>

/***
*_mbsninc - Increment MBCS string pointer by specified char count.
*
*Purpose:
*       Increment the supplied string pointer by the specified number
*       of characters.  MBCS characters are handled correctly.
*
*Entry:
*       const unsigned char *string = pointer to string
*       unsigned int ccnt = number of char to advance the pointer
*
*Exit:
*       Returns pointer after advancing it.
*       Returns pointer to end of string if string is not ccnt chars long.
*       Returns NULL is supplied pointer is NULL.
*
*Exceptions:
*
*******************************************************************************/

unsigned char * __cdecl _mbsninc(
    const unsigned char *string,
    size_t ccnt
    )
{
        if (string == NULL)
                return(NULL);

        return((char *)string + (unsigned int)_mbsnbcnt(string, ccnt));
}

#endif  /* _MBCS */