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Diffstat (limited to 'lib/getopt.h')
-rw-r--r-- | lib/getopt.h | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/lib/getopt.h b/lib/getopt.h new file mode 100644 index 00000000..4283c35b --- /dev/null +++ b/lib/getopt.h | |||
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1 | /* Declarations for getopt. | ||
2 | Copyright (C) 1989-1994, 1996-1999, 2001 Free Software Foundation, Inc. | ||
3 | This file is part of the GNU C Library. | ||
4 | |||
5 | The GNU C Library is free software; you can redistribute it and/or | ||
6 | modify it under the terms of the GNU Lesser General Public | ||
7 | License as published by the Free Software Foundation; either | ||
8 | version 2.1 of the License, or (at your option) any later version. | ||
9 | |||
10 | The GNU C Library is distributed in the hope that it will be useful, | ||
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Lesser General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Lesser General Public | ||
16 | License along with the GNU C Library; if not, write to the Free | ||
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | ||
18 | 02111-1307 USA. */ | ||
19 | |||
20 | #ifndef _GETOPT_H | ||
21 | |||
22 | #ifndef __need_getopt | ||
23 | # define _GETOPT_H 1 | ||
24 | #endif | ||
25 | |||
26 | /* If __GNU_LIBRARY__ is not already defined, either we are being used | ||
27 | standalone, or this is the first header included in the source file. | ||
28 | If we are being used with glibc, we need to include <features.h>, but | ||
29 | that does not exist if we are standalone. So: if __GNU_LIBRARY__ is | ||
30 | not defined, include <ctype.h>, which will pull in <features.h> for us | ||
31 | if it's from glibc. (Why ctype.h? It's guaranteed to exist and it | ||
32 | doesn't flood the namespace with stuff the way some other headers do.) */ | ||
33 | #if !defined __GNU_LIBRARY__ | ||
34 | # include <ctype.h> | ||
35 | #endif | ||
36 | |||
37 | #ifdef __cplusplus | ||
38 | extern "C" { | ||
39 | #endif | ||
40 | |||
41 | /* For communication from `getopt' to the caller. | ||
42 | When `getopt' finds an option that takes an argument, | ||
43 | the argument value is returned here. | ||
44 | Also, when `ordering' is RETURN_IN_ORDER, | ||
45 | each non-option ARGV-element is returned here. */ | ||
46 | |||
47 | extern char *optarg; | ||
48 | |||
49 | /* Index in ARGV of the next element to be scanned. | ||
50 | This is used for communication to and from the caller | ||
51 | and for communication between successive calls to `getopt'. | ||
52 | |||
53 | On entry to `getopt', zero means this is the first call; initialize. | ||
54 | |||
55 | When `getopt' returns -1, this is the index of the first of the | ||
56 | non-option elements that the caller should itself scan. | ||
57 | |||
58 | Otherwise, `optind' communicates from one call to the next | ||
59 | how much of ARGV has been scanned so far. */ | ||
60 | |||
61 | extern int optind; | ||
62 | |||
63 | /* Callers store zero here to inhibit the error message `getopt' prints | ||
64 | for unrecognized options. */ | ||
65 | |||
66 | extern int opterr; | ||
67 | |||
68 | /* Set to an option character which was unrecognized. */ | ||
69 | |||
70 | extern int optopt; | ||
71 | |||
72 | #ifndef __need_getopt | ||
73 | /* Describe the long-named options requested by the application. | ||
74 | The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector | ||
75 | of `struct option' terminated by an element containing a name which is | ||
76 | zero. | ||
77 | |||
78 | The field `has_arg' is: | ||
79 | no_argument (or 0) if the option does not take an argument, | ||
80 | required_argument (or 1) if the option requires an argument, | ||
81 | optional_argument (or 2) if the option takes an optional argument. | ||
82 | |||
83 | If the field `flag' is not NULL, it points to a variable that is set | ||
84 | to the value given in the field `val' when the option is found, but | ||
85 | left unchanged if the option is not found. | ||
86 | |||
87 | To have a long-named option do something other than set an `int' to | ||
88 | a compiled-in constant, such as set a value from `optarg', set the | ||
89 | option's `flag' field to zero and its `val' field to a nonzero | ||
90 | value (the equivalent single-letter option character, if there is | ||
91 | one). For long options that have a zero `flag' field, `getopt' | ||
92 | returns the contents of the `val' field. */ | ||
93 | |||
94 | struct option | ||
95 | { | ||
96 | # if (defined __STDC__ && __STDC__) || defined __cplusplus | ||
97 | const char *name; | ||
98 | # else | ||
99 | char *name; | ||
100 | # endif | ||
101 | /* has_arg can't be an enum because some compilers complain about | ||
102 | type mismatches in all the code that assumes it is an int. */ | ||
103 | int has_arg; | ||
104 | int *flag; | ||
105 | int val; | ||
106 | }; | ||
107 | |||
108 | /* Names for the values of the `has_arg' field of `struct option'. */ | ||
109 | |||
110 | # define no_argument 0 | ||
111 | # define required_argument 1 | ||
112 | # define optional_argument 2 | ||
113 | #endif /* need getopt */ | ||
114 | |||
115 | |||
116 | /* Get definitions and prototypes for functions to process the | ||
117 | arguments in ARGV (ARGC of them, minus the program name) for | ||
118 | options given in OPTS. | ||
119 | |||
120 | Return the option character from OPTS just read. Return -1 when | ||
121 | there are no more options. For unrecognized options, or options | ||
122 | missing arguments, `optopt' is set to the option letter, and '?' is | ||
123 | returned. | ||
124 | |||
125 | The OPTS string is a list of characters which are recognized option | ||
126 | letters, optionally followed by colons, specifying that that letter | ||
127 | takes an argument, to be placed in `optarg'. | ||
128 | |||
129 | If a letter in OPTS is followed by two colons, its argument is | ||
130 | optional. This behavior is specific to the GNU `getopt'. | ||
131 | |||
132 | The argument `--' causes premature termination of argument | ||
133 | scanning, explicitly telling `getopt' that there are no more | ||
134 | options. | ||
135 | |||
136 | If OPTS begins with `--', then non-option arguments are treated as | ||
137 | arguments to the option '\0'. This behavior is specific to the GNU | ||
138 | `getopt'. */ | ||
139 | |||
140 | #if (defined __STDC__ && __STDC__) || defined __cplusplus | ||
141 | # ifdef __GNU_LIBRARY__ | ||
142 | /* Many other libraries have conflicting prototypes for getopt, with | ||
143 | differences in the consts, in stdlib.h. To avoid compilation | ||
144 | errors, only prototype getopt for the GNU C library. */ | ||
145 | extern int getopt (int ___argc, char *const *___argv, const char *__shortopts); | ||
146 | # else /* not __GNU_LIBRARY__ */ | ||
147 | extern int getopt (); | ||
148 | # endif /* __GNU_LIBRARY__ */ | ||
149 | |||
150 | # ifndef __need_getopt | ||
151 | extern int getopt_long (int ___argc, char *const *___argv, | ||
152 | const char *__shortopts, | ||
153 | const struct option *__longopts, int *__longind); | ||
154 | extern int getopt_long_only (int ___argc, char *const *___argv, | ||
155 | const char *__shortopts, | ||
156 | const struct option *__longopts, int *__longind); | ||
157 | |||
158 | /* Internal only. Users should not call this directly. */ | ||
159 | extern int _getopt_internal (int ___argc, char *const *___argv, | ||
160 | const char *__shortopts, | ||
161 | const struct option *__longopts, int *__longind, | ||
162 | int __long_only); | ||
163 | # endif | ||
164 | #else /* not __STDC__ */ | ||
165 | extern int getopt (); | ||
166 | # ifndef __need_getopt | ||
167 | extern int getopt_long (); | ||
168 | extern int getopt_long_only (); | ||
169 | |||
170 | extern int _getopt_internal (); | ||
171 | # endif | ||
172 | #endif /* __STDC__ */ | ||
173 | |||
174 | #ifdef __cplusplus | ||
175 | } | ||
176 | #endif | ||
177 | |||
178 | /* Make sure we later can get all the definitions and declarations. */ | ||
179 | #undef __need_getopt | ||
180 | |||
181 | #endif /* getopt.h */ | ||