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/* Find the length of STRING, but scan at most MAXLEN characters.
Copyright (C) 2005-2007, 2009-2025 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include <string.h>
/* Find the length of S, but scan at most MAXLEN bytes.
S must be a string if it starts with fewer than MAXLEN initialized bytes.
If no '\0' terminator is found in that many bytes, return MAXLEN. */
size_t
strnlen (const char *s, size_t maxlen)
{
/* Do not use memchr, because on some platforms memchr has
undefined behavior if MAXLEN exceeds the number of bytes in S. */
size_t i;
for (i = 0; i < maxlen && s[i]; i++)
continue;
return i;
}
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