1// Licensed to the .NET Foundation under one or more agreements.
2// The .NET Foundation licenses this file to you under the MIT license.
3// See the LICENSE file in the project root for more information.
4
5/***
6*wcslen_s.c - contains wcsnlen() routine
7*
8
9*
10*Purpose:
11* wcslen returns the length of a null-terminated wide-character string,
12* not including the null wchar_t itself.
13*
14*******************************************************************************/
15
16
17#include <string.h>
18#include <errno.h>
19#include <limits.h>
20#include "internal_securecrt.h"
21
22#include "mbusafecrt_internal.h"
23
24/***
25*wcsnlen - return the length of a null-terminated wide-character string
26*
27*Purpose:
28* Finds the length in bytes of the given string, not including
29* the final null character. Only the first maxsize characters
30* are inspected: if the null character is not found, maxsize is
31* returned.
32*
33*Entry:
34* const wchar_t * wcs - string whose length is to be computed
35* size_t maxsize
36*
37*Exit:
38* Length of the string "wcs", exclusive of the final null byte, or
39* maxsize if the null character is not found.
40*
41*Exceptions:
42*
43*******************************************************************************/
44
45size_t __cdecl PAL_wcsnlen(const wchar_t *wcs, size_t maxsize)
46{
47 size_t n;
48
49 /* Note that we do not check if s == NULL, because we do not
50 * return errno_t...
51 */
52
53 for (n = 0; n < maxsize && *wcs; n++, wcs++)
54 ;
55
56 return n;
57}
58
59