annotate lib/strndup.c @ 7302:8a1a9361108c

* _fpending.c: Include <config.h> unconditionally, since we no longer worry about uses that don't define HAVE_CONFIG_H. * acl.c, alloca.c, argmatch.c, atexit.c, backupfile.c: * basename.c, c-stack.c, c-strtod.c, calloc.c, canon-host.c: * canonicalize.c, chdir-long.c, chdir-safer.c, chown.c: * cloexec.c, close-stream.c, closeout.c, creat-safer.c: * cycle-check.c, diacrit.c, dirchownmod.c, dirfd.c, dirname.c: * dup-safer.c, dup2.c, error.c, euidaccess.c, exclude.c: * exitfail.c, fchmodat.c, fchown-stub.c, fd-safer.c: * file-type.c, fileblocks.c, filemode.c, filenamecat.c: * fnmatch.c, fopen-safer.c, fprintftime.c, free.c, fsusage.c: * ftruncate.c, fts-cycle.c, fts.c, full-write.c, gai_strerror.c: * getcwd.c, getdate.y, getdomainname.c, getgroups.c: * gethostname.c, gethrxtime.c, getloadavg.c, getlogin_r.c: * getndelim2.c, getnline.c, getopt.c, getopt1.c, getpass.c: * gettime.c, gettimeofday.c, getugroups.c, getusershell.c: * glob.c, group-member.c, hard-locale.c, hash-pjw.c, hash.c: * human.c, idcache.c, inet_ntop.c, inet_pton.c, inttostr.c: * isdir.c, lchown.c, linebuffer.c, long-options.c, lstat.c: * malloc.c, md5.c, memcasecmp.c, memchr.c, memcmp.c, memcoll.c: * memcpy.c, memmove.c, memrchr.c, mkancesdirs.c, mkdir-p.c: * mkdir.c, mkdirat.c, mkstemp-safer.c, mkstemp.c, modechange.c: * mountlist.c, nanosleep.c, obstack.c, open-safer.c: * openat-die.c, openat.c, pagealign_alloc.c, physmem.c: * pipe-safer.c, posixtm.c, posixver.c, putenv.c, quote.c: * quotearg.c, raise.c, readtokens.c, readtokens0.c, readutmp.c: * realloc.c, regex.c, rename.c, rmdir.c, rpmatch.c, safe-read.c: * same.c, save-cwd.c, savedir.c, setenv.c, settime.c, sha1.c: * sig2str.c, snprintf.c, strdup.c, strerror.c, strftime.c: * stripslash.c, strndup.c, strnlen.c, strpbrk.c, strtod.c: * strtoimax.c, strtol.c, strverscmp.c, tempname.c, time_r.c: * timegm.c, tmpfile-safer.c, unlinkdir.c, userspec.c, utime.c: * utimecmp.c, utimens.c, version-etc-fsf.c, version-etc.c: * xalloc-die.c, xgetcwd.c, xgethostname.c, xmalloc.c: * xmemcoll.c, xnanosleep.c, xreadlink.c, xstrtod.c: * xstrtoimax.c, xstrtol.c, xstrtoumax.c, yesno.c: Likewise.
author Paul Eggert <eggert@cs.ucla.edu>
date Wed, 13 Sep 2006 22:38:14 +0000
parents f63adaadabfa
children 3ee6e46a13c3
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1 /* Copyright (C) 1996, 1997, 1998, 2001, 2002, 2003, 2005, 2006 Free
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2 Software Foundation, Inc.
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3
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4 NOTE: The canonical source of this file is maintained with the GNU C Library.
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5 Bugs can be reported to bug-glibc@prep.ai.mit.edu.
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6
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7 This program is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 This program is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with this program; if not, write to the Free Software Foundation,
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19 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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20
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21 #if !_LIBC
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22 # include <config.h>
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23 # include "strndup.h"
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24 #endif
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25
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26 #include <stdlib.h>
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27 #include <string.h>
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28
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29 #if !_LIBC
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30 # include "strnlen.h"
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31 # ifndef __strnlen
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32 # define __strnlen strnlen
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33 # endif
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34 #endif
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35
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36 #undef __strndup
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37 #if _LIBC
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38 # undef strndup
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39 #endif
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40
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41 #ifndef weak_alias
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42 # define __strndup strndup
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43 #endif
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44
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45 char *
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46 __strndup (s, n)
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47 const char *s;
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48 size_t n;
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49 {
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50 size_t len = __strnlen (s, n);
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51 char *new = malloc (len + 1);
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52
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53 if (new == NULL)
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54 return NULL;
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55
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56 new[len] = '\0';
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57 return memcpy (new, s, len);
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58 }
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59 #ifdef libc_hidden_def
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60 libc_hidden_def (__strndup)
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61 #endif
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62 #ifdef weak_alias
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63 weak_alias (__strndup, strndup)
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64 #endif