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1 /* Find the length of STRING, but scan at most MAXLEN characters.
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2 Copyright (C) 2005, 2006, 2007, 2009, 2010 Free Software Foundation, Inc.
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3 Written by Simon Josefsson.
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4
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5 This program is free software; you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3, or (at your option)
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8 any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; if not, write to the Free Software Foundation,
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17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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18
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19 #include <config.h>
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20
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21 #include <string.h>
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22
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23 /* Find the length of STRING, but scan at most MAXLEN characters.
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24 If no '\0' terminator is found in that many characters, return MAXLEN. */
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25
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26 size_t
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27 strnlen (const char *string, size_t maxlen)
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28 {
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29 const char *end = memchr (string, '\0', maxlen);
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30 return end ? (size_t) (end - string) : maxlen;
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31 }
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