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8690e634 | 1 | /* Find the length of STRING + 1, but scan at most MAXLEN bytes. |
5df4cba6 | 2 | Copyright (C) 2005-2006, 2009-2020 Free Software Foundation, Inc. |
8690e634 JK |
3 | |
4 | This program is free software: you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation; either version 3 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
c0c3707f | 15 | along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
8690e634 JK |
16 | |
17 | #include <config.h> | |
18 | ||
19 | /* Specification. */ | |
20 | #include "strnlen1.h" | |
21 | ||
22 | #include <string.h> | |
23 | ||
24 | /* Find the length of STRING + 1, but scan at most MAXLEN bytes. | |
25 | If no '\0' terminator is found in that many characters, return MAXLEN. */ | |
26 | /* This is the same as strnlen (string, maxlen - 1) + 1. */ | |
27 | size_t | |
28 | strnlen1 (const char *string, size_t maxlen) | |
29 | { | |
30 | const char *end = (const char *) memchr (string, '\0', maxlen); | |
31 | if (end != NULL) | |
32 | return end - string + 1; | |
33 | else | |
34 | return maxlen; | |
35 | } |