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annotate lib/getopt-pfx-core.h @ 40186:8964917f9574

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author Karl Berry <karl@freefriends.org>
date Mon, 18 Feb 2019 08:02:49 -0800
parents b06060465f09
children
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1 /* getopt (basic, portable features) gnulib wrapper header.
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2 Copyright (C) 1989-2019 Free Software Foundation, Inc.
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3 This file is part of gnulib.
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4 Unlike most of the getopt implementation, it is NOT shared
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5 with the GNU C Library.
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6
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7 This file is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU Lesser General Public License as
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9 published by the Free Software Foundation; either version 2.1 of
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10 the License, or (at your option) any later version.
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11
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12 This file is distributed in the hope that it will be useful, but
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13 WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 Lesser 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 Lesser General Public
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18 License along with gnulib; if not, see
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19 <https://www.gnu.org/licenses/>. */
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20
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21 #ifndef _GETOPT_PFX_CORE_H
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22 #define _GETOPT_PFX_CORE_H 1
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23
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24 /* This header should not be used directly; include getopt.h or
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25 unistd.h instead. It does not have a protective #error, because
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26 the guard macro for getopt.h in gnulib is not fixed. */
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27
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28 /* Standalone applications should #define __GETOPT_PREFIX to an
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29 identifier that prefixes the external functions and variables
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30 defined in getopt-core.h and getopt-ext.h. Systematically
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31 rename identifiers so that they do not collide with the system
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32 functions and variables. Renaming avoids problems with some
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33 compilers and linkers. */
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34 #ifdef __GETOPT_PREFIX
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35 # ifndef __GETOPT_ID
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36 # define __GETOPT_CONCAT(x, y) x ## y
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37 # define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y)
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38 # define __GETOPT_ID(y) __GETOPT_XCONCAT (__GETOPT_PREFIX, y)
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39 # endif
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40 # undef getopt
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41 # undef optarg
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42 # undef opterr
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43 # undef optind
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44 # undef optopt
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45 # define getopt __GETOPT_ID (getopt)
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46 # define optarg __GETOPT_ID (optarg)
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47 # define opterr __GETOPT_ID (opterr)
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48 # define optind __GETOPT_ID (optind)
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49 # define optopt __GETOPT_ID (optopt)
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51 /* The system's getopt.h may have already included getopt-core.h to
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52 declare the unprefixed identifiers. Undef _GETOPT_CORE_H so that
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53 getopt-core.h declares them with prefixes. */
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54 # undef _GETOPT_CORE_H
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55 #endif
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56
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57 #include <getopt-core.h>
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58
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59 #endif /* _GETOPT_PFX_CORE_H */