annotate lib/strdup.c @ 40057:b06060465f09

maint: Run 'make update-copyright'
author Paul Eggert <eggert@cs.ucla.edu>
date Tue, 01 Jan 2019 00:25:11 +0100
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1 /* Copyright (C) 1991, 1996-1998, 2002-2004, 2006-2007, 2009-2019 Free Software
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2 Foundation, Inc.
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3
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4 This file is part of the GNU C Library.
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6 This program is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2, or (at your option)
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9 any later version.
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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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16 You should have received a copy of the GNU General Public License along
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17 with this program; if not, see <https://www.gnu.org/licenses/>. */
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18
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19 #ifndef _LIBC
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20 # include <config.h>
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21 #endif
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22
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23 /* Get specification. */
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24 #include <string.h>
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25
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26 #include <stdlib.h>
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27
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28 #undef __strdup
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29 #ifdef _LIBC
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30 # undef strdup
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31 #endif
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32
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33 #ifndef weak_alias
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34 # define __strdup strdup
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35 #endif
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36
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37 /* Duplicate S, returning an identical malloc'd string. */
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38 char *
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39 __strdup (const char *s)
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40 {
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41 size_t len = strlen (s) + 1;
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42 void *new = malloc (len);
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43
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44 if (new == NULL)
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45 return NULL;
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46
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47 return (char *) memcpy (new, s, len);
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48 }
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49 #ifdef libc_hidden_def
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50 libc_hidden_def (__strdup)
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51 #endif
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52 #ifdef weak_alias
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53 weak_alias (__strdup, strdup)
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54 #endif