annotate lib/strndup.c @ 2469:3e7cc1ecce32

update from glibc
author Jim Meyering <jim@meyering.net>
date Thu, 04 May 2000 06:35:49 +0000
parents 38fd8f5d359d
children e17209e9562d
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1 /* Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
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2
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3 NOTE: The canonical source of this file is maintained with the GNU C Library.
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4 Bugs can be reported to bug-glibc@prep.ai.mit.edu.
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5
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6 This program is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with this program; if not, write to the Free Software Foundation,
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18 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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19
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20 #ifdef HAVE_CONFIG_H
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21 # include "config.h"
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22 #endif
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23
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24 #include <stdio.h>
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25 #include <sys/types.h>
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26
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27 #if defined _LIBC || defined STDC_HEADERS
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28 # include <stdlib.h>
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29 # include <string.h>
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30 #else
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31 char *malloc ();
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32 #endif
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33
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34 #undef __strndup
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35 #undef strndup
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36
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37 #ifndef weak_alias
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38 # define __strndup strndup
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39 #endif
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40
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41 char *
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42 __strndup (const char *s, size_t n)
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43 {
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44 size_t len = strnlen (s, n);
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45 char *new = malloc (len + 1);
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46
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47 if (new == NULL)
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48 return NULL;
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49
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50 new[len] = '\0';
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51 return (char *) memcpy (new, s, len);
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52 }
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53 #ifdef weak_alias
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54 weak_alias (__strndup, strndup)
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55 #endif