wcsnset.c

来自「C语言库函数的原型,有用的拿去」· C语言 代码 · 共 50 行

/***
*wcsnset.c - set first n wide-characters to single wide-character
*
*       Copyright (c) Microsoft Corporation. All rights reserved.
*
*Purpose:
*       defines _wcsnset() - sets at most the first n characters of a
*       wchar_t string to a given character.
*
*******************************************************************************/


#include <cruntime.h>
#include <string.h>

/***
*wchar_t *_wcsnset(string, val, count) - set at most count characters to val
*
*Purpose:
*       Sets the first count characters of string the character value.
*       If the length of string is less than count, the length of
*       string is used in place of n (wide-characters).
*
*Entry:
*       wchar_t *string - string to set characters in
*       wchar_t val - character to fill with
*       size_t count - count of characters to fill
*
*Exit:
*       returns string, now filled with count copies of val.
*
*Exceptions:
*
*******************************************************************************/

wchar_t * __cdecl _wcsnset (
        wchar_t * string,
        wchar_t val,
        size_t count
        )
{
        wchar_t *start = string;

        while (count-- && *string)
                *string++ = (wchar_t)val;

        return(start);
}