Benny Prijono | e722461 | 2005-11-13 19:40:44 +0000 | [diff] [blame^] | 1 | /* $Id$
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| 2 | *
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| 3 | */
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| 4 | /*
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| 5 | * PJSIP - SIP Stack
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| 6 | * (C)2003-2005 Benny Prijono <bennylp@bulukucing.org>
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| 7 | *
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| 8 | * Author:
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| 9 | * Benny Prijono <bennylp@bulukucing.org>
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| 10 | *
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| 11 | * This library is free software; you can redistribute it and/or
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| 12 | * modify it under the terms of the GNU Lesser General Public
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| 13 | * License as published by the Free Software Foundation; either
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| 14 | * version 2.1 of the License, or (at your option) any later version.
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| 15 | *
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| 16 | * This library is distributed in the hope that it will be useful,
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| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 19 | * Lesser General Public License for more details.
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| 20 | *
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| 21 | * You should have received a copy of the GNU Lesser General Public
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| 22 | * License along with this library; if not, write to the Free Software
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| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 24 | *
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| 25 | */
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| 26 | /* Declarations for getopt.
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| 27 | Copyright (C) 1989,90,91,92,93,94,96,97,98 Free Software Foundation, Inc.
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| 28 | This file is part of the GNU C Library.
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| 29 |
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| 30 | The GNU C Library is free software; you can redistribute it and/or
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| 31 | modify it under the terms of the GNU Library General Public License as
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| 32 | published by the Free Software Foundation; either version 2 of the
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| 33 | License, or (at your option) any later version.
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| 34 |
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| 35 | The GNU C Library is distributed in the hope that it will be useful,
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| 36 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 37 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 38 | Library General Public License for more details.
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| 39 |
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| 40 | You should have received a copy of the GNU Library General Public
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| 41 | License along with the GNU C Library; see the file COPYING.LIB. If not,
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| 42 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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| 43 | Boston, MA 02111-1307, USA. */
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| 44 |
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| 45 | #ifndef _GETOPT_H
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| 46 | #define _GETOPT_H 1
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| 47 |
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| 48 | #ifdef __cplusplus
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| 49 | extern "C" {
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| 50 | #endif
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| 51 |
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| 52 | /* For communication from `getopt' to the caller.
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| 53 | When `getopt' finds an option that takes an argument,
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| 54 | the argument value is returned here.
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| 55 | Also, when `ordering' is RETURN_IN_ORDER,
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| 56 | each non-option ARGV-element is returned here. */
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| 57 |
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| 58 | extern char *optarg;
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| 59 |
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| 60 | /* Index in ARGV of the next element to be scanned.
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| 61 | This is used for communication to and from the caller
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| 62 | and for communication between successive calls to `getopt'.
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| 63 |
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| 64 | On entry to `getopt', zero means this is the first call; initialize.
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| 65 |
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| 66 | When `getopt' returns -1, this is the index of the first of the
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| 67 | non-option elements that the caller should itself scan.
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| 68 |
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| 69 | Otherwise, `optind' communicates from one call to the next
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| 70 | how much of ARGV has been scanned so far. */
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| 71 |
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| 72 | extern int optind;
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| 73 |
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| 74 | /* Callers store zero here to inhibit the error message `getopt' prints
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| 75 | for unrecognized options. */
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| 76 |
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| 77 | extern int opterr;
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| 78 |
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| 79 | /* Set to an option character which was unrecognized. */
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| 80 |
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| 81 | extern int optopt;
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| 82 |
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| 83 | /* Describe the long-named options requested by the application.
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| 84 | The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
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| 85 | of `struct option' terminated by an element containing a name which is
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| 86 | zero.
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| 87 |
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| 88 | The field `has_arg' is:
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| 89 | no_argument (or 0) if the option does not take an argument,
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| 90 | required_argument (or 1) if the option requires an argument,
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| 91 | optional_argument (or 2) if the option takes an optional argument.
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| 92 |
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| 93 | If the field `flag' is not NULL, it points to a variable that is set
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| 94 | to the value given in the field `val' when the option is found, but
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| 95 | left unchanged if the option is not found.
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| 96 |
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| 97 | To have a long-named option do something other than set an `int' to
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| 98 | a compiled-in constant, such as set a value from `optarg', set the
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| 99 | option's `flag' field to zero and its `val' field to a nonzero
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| 100 | value (the equivalent single-letter option character, if there is
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| 101 | one). For long options that have a zero `flag' field, `getopt'
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| 102 | returns the contents of the `val' field. */
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| 103 |
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| 104 | struct option
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| 105 | {
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| 106 | const char *name;
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| 107 | /* has_arg can't be an enum because some compilers complain about
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| 108 | type mismatches in all the code that assumes it is an int. */
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| 109 | int has_arg;
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| 110 | int *flag;
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| 111 | int val;
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| 112 | };
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| 113 |
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| 114 | /* Names for the values of the `has_arg' field of `struct option'. */
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| 115 |
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| 116 | # define no_argument 0
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| 117 | # define required_argument 1
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| 118 | # define optional_argument 2
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| 119 |
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| 120 |
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| 121 | /* Get definitions and prototypes for functions to process the
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| 122 | arguments in ARGV (ARGC of them, minus the program name) for
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| 123 | options given in OPTS.
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| 124 |
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| 125 | Return the option character from OPTS just read. Return -1 when
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| 126 | there are no more options. For unrecognized options, or options
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| 127 | missing arguments, `optopt' is set to the option letter, and '?' is
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| 128 | returned.
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| 129 |
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| 130 | The OPTS string is a list of characters which are recognized option
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| 131 | letters, optionally followed by colons, specifying that that letter
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| 132 | takes an argument, to be placed in `optarg'.
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| 133 |
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| 134 | If a letter in OPTS is followed by two colons, its argument is
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| 135 | optional. This behavior is specific to the GNU `getopt'.
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| 136 |
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| 137 | The argument `--' causes premature termination of argument
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| 138 | scanning, explicitly telling `getopt' that there are no more
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| 139 | options.
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| 140 |
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| 141 | If OPTS begins with `--', then non-option arguments are treated as
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| 142 | arguments to the option '\0'. This behavior is specific to the GNU
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| 143 | `getopt'. */
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| 144 |
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| 145 | int getopt (int argc, char *const *argv, const char *shortopts);
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| 146 |
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| 147 | int getopt_long (int argc, char *const *argv, const char *options,
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| 148 | const struct option *longopts, int *longind);
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| 149 | int getopt_long_only (int argc, char *const *argv,
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| 150 | const char *shortopts,
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| 151 | const struct option *longopts, int *longind);
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| 152 |
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| 153 | /* Internal only. Users should not call this directly. */
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| 154 | int _getopt_internal (int argc, char *const *argv,
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| 155 | const char *shortopts,
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| 156 | const struct option *longopts, int *longind,
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| 157 | int long_only);
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| 158 |
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| 159 | #ifdef __cplusplus
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| 160 | }
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| 161 | #endif
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| 162 |
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| 163 | #endif /* getopt.h */
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| 164 |
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