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*tcscat_s.inl - general implementation of _tcscpy_s
7*
8
9*
10*Purpose:
11* This file contains the general algorithm for strcat_s and its variants.
12*
13****/
14
15_FUNC_PROLOGUE
16errno_t __cdecl _FUNC_NAME(_CHAR *_DEST, size_t _SIZE, const _CHAR *_SRC)
17{
18 _CHAR *p;
19 size_t available;
20
21 /* validation section */
22 _VALIDATE_STRING(_DEST, _SIZE);
23 _VALIDATE_POINTER_RESET_STRING(_SRC, _DEST, _SIZE);
24
25 p = _DEST;
26 available = _SIZE;
27 while (available > 0 && *p != 0)
28 {
29 p++;
30 available--;
31 }
32
33 if (available == 0)
34 {
35 _RESET_STRING(_DEST, _SIZE);
36 _RETURN_DEST_NOT_NULL_TERMINATED(_DEST, _SIZE);
37 }
38
39 while ((*p++ = *_SRC++) != 0 && --available > 0)
40 {
41 }
42
43 if (available == 0)
44 {
45 _RESET_STRING(_DEST, _SIZE);
46 _RETURN_BUFFER_TOO_SMALL(_DEST, _SIZE);
47 }
48 _FILL_STRING(_DEST, _SIZE, _SIZE - available + 1);
49 _RETURN_NO_ERROR;
50}
51
52