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9eff9fe3 | 1 | /* Declarations for getopt. |
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2 | Copyright (C) 1989-1994, 1996-1999, 2001, 2003-2007, 2009-2011 Free Software |
3 | Foundation, Inc. | |
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4 | This file is part of the GNU C Library. |
5 | ||
e275c824 | 6 | This program is free software: you can redistribute it and/or modify |
9eff9fe3 | 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 3 of the License, or |
9 | (at your option) any later version. | |
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10 | |
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
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16 | You should have received a copy of the GNU General Public License |
17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
9eff9fe3 | 18 | |
e765a388 | 19 | #ifndef _GL_GETOPT_H |
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20 | |
21 | #if __GNUC__ >= 3 | |
22 | @PRAGMA_SYSTEM_HEADER@ | |
23 | #endif | |
24 | @PRAGMA_COLUMNS@ | |
25 | ||
26 | /* The include_next requires a split double-inclusion guard. We must | |
27 | also inform the replacement unistd.h to not recursively use | |
28 | <getopt.h>; our definitions will be present soon enough. */ | |
29 | #if @HAVE_GETOPT_H@ | |
30 | # define _GL_SYSTEM_GETOPT | |
31 | # @INCLUDE_NEXT@ @NEXT_GETOPT_H@ | |
32 | # undef _GL_SYSTEM_GETOPT | |
33 | #endif | |
34 | ||
e765a388 | 35 | #ifndef _GL_GETOPT_H |
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36 | |
37 | #ifndef __need_getopt | |
e765a388 | 38 | # define _GL_GETOPT_H 1 |
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39 | #endif |
40 | ||
41 | /* Standalone applications should #define __GETOPT_PREFIX to an | |
42 | identifier that prefixes the external functions and variables | |
43 | defined in this header. When this happens, include the | |
44 | headers that might declare getopt so that they will not cause | |
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45 | confusion if included after this file (if the system had <getopt.h>, |
46 | we have already included it). Then systematically rename | |
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47 | identifiers so that they do not collide with the system functions |
48 | and variables. Renaming avoids problems with some compilers and | |
49 | linkers. */ | |
50 | #if defined __GETOPT_PREFIX && !defined __need_getopt | |
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51 | # if !@HAVE_GETOPT_H@ |
52 | # include <stdlib.h> | |
53 | # include <stdio.h> | |
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54 | # include <unistd.h> |
55 | # endif | |
56 | # undef __need_getopt | |
57 | # undef getopt | |
58 | # undef getopt_long | |
59 | # undef getopt_long_only | |
60 | # undef optarg | |
61 | # undef opterr | |
62 | # undef optind | |
63 | # undef optopt | |
e275c824 | 64 | # undef option |
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65 | # define __GETOPT_CONCAT(x, y) x ## y |
66 | # define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y) | |
67 | # define __GETOPT_ID(y) __GETOPT_XCONCAT (__GETOPT_PREFIX, y) | |
68 | # define getopt __GETOPT_ID (getopt) | |
69 | # define getopt_long __GETOPT_ID (getopt_long) | |
70 | # define getopt_long_only __GETOPT_ID (getopt_long_only) | |
71 | # define optarg __GETOPT_ID (optarg) | |
72 | # define opterr __GETOPT_ID (opterr) | |
73 | # define optind __GETOPT_ID (optind) | |
74 | # define optopt __GETOPT_ID (optopt) | |
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75 | # define option __GETOPT_ID (option) |
76 | # define _getopt_internal __GETOPT_ID (getopt_internal) | |
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77 | #endif |
78 | ||
79 | /* Standalone applications get correct prototypes for getopt_long and | |
80 | getopt_long_only; they declare "char **argv". libc uses prototypes | |
81 | with "char *const *argv" that are incorrect because getopt_long and | |
82 | getopt_long_only can permute argv; this is required for backward | |
83 | compatibility (e.g., for LSB 2.0.1). | |
84 | ||
85 | This used to be `#if defined __GETOPT_PREFIX && !defined __need_getopt', | |
86 | but it caused redefinition warnings if both unistd.h and getopt.h were | |
87 | included, since unistd.h includes getopt.h having previously defined | |
88 | __need_getopt. | |
89 | ||
90 | The only place where __getopt_argv_const is used is in definitions | |
91 | of getopt_long and getopt_long_only below, but these are visible | |
92 | only if __need_getopt is not defined, so it is quite safe to rewrite | |
93 | the conditional as follows: | |
94 | */ | |
95 | #if !defined __need_getopt | |
96 | # if defined __GETOPT_PREFIX | |
97 | # define __getopt_argv_const /* empty */ | |
98 | # else | |
99 | # define __getopt_argv_const const | |
100 | # endif | |
101 | #endif | |
102 | ||
103 | /* If __GNU_LIBRARY__ is not already defined, either we are being used | |
104 | standalone, or this is the first header included in the source file. | |
105 | If we are being used with glibc, we need to include <features.h>, but | |
106 | that does not exist if we are standalone. So: if __GNU_LIBRARY__ is | |
107 | not defined, include <ctype.h>, which will pull in <features.h> for us | |
108 | if it's from glibc. (Why ctype.h? It's guaranteed to exist and it | |
109 | doesn't flood the namespace with stuff the way some other headers do.) */ | |
110 | #if !defined __GNU_LIBRARY__ | |
111 | # include <ctype.h> | |
112 | #endif | |
113 | ||
114 | #ifndef __THROW | |
115 | # ifndef __GNUC_PREREQ | |
116 | # define __GNUC_PREREQ(maj, min) (0) | |
117 | # endif | |
118 | # if defined __cplusplus && __GNUC_PREREQ (2,8) | |
e275c824 | 119 | # define __THROW throw () |
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120 | # else |
121 | # define __THROW | |
122 | # endif | |
123 | #endif | |
124 | ||
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125 | /* The definition of _GL_ARG_NONNULL is copied here. */ |
126 | ||
127 | #ifdef __cplusplus | |
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128 | extern "C" { |
129 | #endif | |
130 | ||
131 | /* For communication from `getopt' to the caller. | |
132 | When `getopt' finds an option that takes an argument, | |
133 | the argument value is returned here. | |
134 | Also, when `ordering' is RETURN_IN_ORDER, | |
135 | each non-option ARGV-element is returned here. */ | |
136 | ||
137 | extern char *optarg; | |
138 | ||
139 | /* Index in ARGV of the next element to be scanned. | |
140 | This is used for communication to and from the caller | |
141 | and for communication between successive calls to `getopt'. | |
142 | ||
143 | On entry to `getopt', zero means this is the first call; initialize. | |
144 | ||
145 | When `getopt' returns -1, this is the index of the first of the | |
146 | non-option elements that the caller should itself scan. | |
147 | ||
148 | Otherwise, `optind' communicates from one call to the next | |
149 | how much of ARGV has been scanned so far. */ | |
150 | ||
151 | extern int optind; | |
152 | ||
153 | /* Callers store zero here to inhibit the error message `getopt' prints | |
154 | for unrecognized options. */ | |
155 | ||
156 | extern int opterr; | |
157 | ||
158 | /* Set to an option character which was unrecognized. */ | |
159 | ||
160 | extern int optopt; | |
161 | ||
162 | #ifndef __need_getopt | |
163 | /* Describe the long-named options requested by the application. | |
164 | The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector | |
165 | of `struct option' terminated by an element containing a name which is | |
166 | zero. | |
167 | ||
168 | The field `has_arg' is: | |
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169 | no_argument (or 0) if the option does not take an argument, |
170 | required_argument (or 1) if the option requires an argument, | |
171 | optional_argument (or 2) if the option takes an optional argument. | |
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172 | |
173 | If the field `flag' is not NULL, it points to a variable that is set | |
174 | to the value given in the field `val' when the option is found, but | |
175 | left unchanged if the option is not found. | |
176 | ||
177 | To have a long-named option do something other than set an `int' to | |
178 | a compiled-in constant, such as set a value from `optarg', set the | |
179 | option's `flag' field to zero and its `val' field to a nonzero | |
180 | value (the equivalent single-letter option character, if there is | |
181 | one). For long options that have a zero `flag' field, `getopt' | |
182 | returns the contents of the `val' field. */ | |
183 | ||
59578570 | 184 | # if !GNULIB_defined_struct_option |
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185 | struct option |
186 | { | |
187 | const char *name; | |
188 | /* has_arg can't be an enum because some compilers complain about | |
189 | type mismatches in all the code that assumes it is an int. */ | |
190 | int has_arg; | |
191 | int *flag; | |
192 | int val; | |
193 | }; | |
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194 | # define GNULIB_defined_struct_option 1 |
195 | # endif | |
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196 | |
197 | /* Names for the values of the `has_arg' field of `struct option'. */ | |
198 | ||
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199 | # define no_argument 0 |
200 | # define required_argument 1 | |
201 | # define optional_argument 2 | |
202 | #endif /* need getopt */ | |
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203 | |
204 | ||
205 | /* Get definitions and prototypes for functions to process the | |
206 | arguments in ARGV (ARGC of them, minus the program name) for | |
207 | options given in OPTS. | |
208 | ||
209 | Return the option character from OPTS just read. Return -1 when | |
210 | there are no more options. For unrecognized options, or options | |
211 | missing arguments, `optopt' is set to the option letter, and '?' is | |
212 | returned. | |
213 | ||
214 | The OPTS string is a list of characters which are recognized option | |
215 | letters, optionally followed by colons, specifying that that letter | |
216 | takes an argument, to be placed in `optarg'. | |
217 | ||
218 | If a letter in OPTS is followed by two colons, its argument is | |
219 | optional. This behavior is specific to the GNU `getopt'. | |
220 | ||
221 | The argument `--' causes premature termination of argument | |
222 | scanning, explicitly telling `getopt' that there are no more | |
223 | options. | |
224 | ||
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225 | If OPTS begins with `-', then non-option arguments are treated as |
226 | arguments to the option '\1'. This behavior is specific to the GNU | |
227 | `getopt'. If OPTS begins with `+', or POSIXLY_CORRECT is set in | |
228 | the environment, then do not permute arguments. */ | |
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229 | |
230 | extern int getopt (int ___argc, char *const *___argv, const char *__shortopts) | |
e275c824 | 231 | __THROW _GL_ARG_NONNULL ((2, 3)); |
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232 | |
233 | #ifndef __need_getopt | |
234 | extern int getopt_long (int ___argc, char *__getopt_argv_const *___argv, | |
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235 | const char *__shortopts, |
236 | const struct option *__longopts, int *__longind) | |
237 | __THROW _GL_ARG_NONNULL ((2, 3)); | |
9eff9fe3 | 238 | extern int getopt_long_only (int ___argc, char *__getopt_argv_const *___argv, |
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239 | const char *__shortopts, |
240 | const struct option *__longopts, int *__longind) | |
241 | __THROW _GL_ARG_NONNULL ((2, 3)); | |
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242 | |
243 | #endif | |
244 | ||
e275c824 | 245 | #ifdef __cplusplus |
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246 | } |
247 | #endif | |
248 | ||
249 | /* Make sure we later can get all the definitions and declarations. */ | |
250 | #undef __need_getopt | |
251 | ||
252 | #endif /* getopt.h */ | |
e275c824 | 253 | #endif /* getopt.h */ |