1 /* Declarations for getopt.
2 Copyright (C) 1989-1994,1996-1999,2001,2003,2004,2009,2010
3 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library 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 GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
27 #include "ws_symbol_export.h"
29 /* If __GNU_LIBRARY__ is not already defined, either we are being used
30 standalone, or this is the first header included in the source file.
31 If we are being used with glibc, we need to include <features.h>, but
32 that does not exist if we are standalone. So: if __GNU_LIBRARY__ is
33 not defined, include <ctype.h>, which will pull in <features.h> for us
34 if it's from glibc. (Why ctype.h? It's guaranteed to exist and it
35 doesn't flood the namespace with stuff the way some other headers do.) */
36 #if !defined __GNU_LIBRARY__
41 # ifndef __GNUC_PREREQ
42 # define __GNUC_PREREQ(maj, min) (0)
44 # if defined __cplusplus && __GNUC_PREREQ (2,8)
45 # define __THROW throw ()
55 /* For communication from `getopt' to the caller.
56 When `getopt' finds an option that takes an argument,
57 the argument value is returned here.
58 Also, when `ordering' is RETURN_IN_ORDER,
59 each non-option ARGV-element is returned here. */
61 WS_DLL_PUBLIC char *optarg;
63 /* Index in ARGV of the next element to be scanned.
64 This is used for communication to and from the caller
65 and for communication between successive calls to `getopt'.
67 On entry to `getopt', zero means this is the first call; initialize.
69 When `getopt' returns -1, this is the index of the first of the
70 non-option elements that the caller should itself scan.
72 Otherwise, `optind' communicates from one call to the next
73 how much of ARGV has been scanned so far. */
75 WS_DLL_PUBLIC int optind;
77 /* Callers store zero here to inhibit the error message `getopt' prints
78 for unrecognized options. */
80 WS_DLL_PUBLIC int opterr;
82 /* Set to an option character which was unrecognized. */
84 WS_DLL_PUBLIC int optopt;
87 /* Describe the long-named options requested by the application.
88 The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
89 of `struct option' terminated by an element containing a name which is
92 The field `has_arg' is:
93 no_argument (or 0) if the option does not take an argument,
94 required_argument (or 1) if the option requires an argument,
95 optional_argument (or 2) if the option takes an optional argument.
97 If the field `flag' is not NULL, it points to a variable that is set
98 to the value given in the field `val' when the option is found, but
99 left unchanged if the option is not found.
101 To have a long-named option do something other than set an `int' to
102 a compiled-in constant, such as set a value from `optarg', set the
103 option's `flag' field to zero and its `val' field to a nonzero
104 value (the equivalent single-letter option character, if there is
105 one). For long options that have a zero `flag' field, `getopt'
106 returns the contents of the `val' field. */
111 /* has_arg can't be an enum because some compilers complain about
112 type mismatches in all the code that assumes it is an int. */
118 /* Names for the values of the `has_arg' field of `struct option'. */
120 # define no_argument 0
121 # define required_argument 1
122 # define optional_argument 2
123 #endif /* need getopt */
126 /* Get definitions and prototypes for functions to process the
127 arguments in ARGV (ARGC of them, minus the program name) for
128 options given in OPTS.
130 Return the option character from OPTS just read. Return -1 when
131 there are no more options. For unrecognized options, or options
132 missing arguments, `optopt' is set to the option letter, and '?' is
135 The OPTS string is a list of characters which are recognized option
136 letters, optionally followed by colons, specifying that that letter
137 takes an argument, to be placed in `optarg'.
139 If a letter in OPTS is followed by two colons, its argument is
140 optional. This behavior is specific to the GNU `getopt'.
142 The argument `--' causes premature termination of argument
143 scanning, explicitly telling `getopt' that there are no more
146 If OPTS begins with `--', then non-option arguments are treated as
147 arguments to the option '\0'. This behavior is specific to the GNU
150 #ifdef __GNU_LIBRARY__
151 /* Many other libraries have conflicting prototypes for getopt, with
152 differences in the consts, in stdlib.h. To avoid compilation
153 errors, only prototype getopt for the GNU C library. */
154 WS_DLL_PUBLIC int getopt (int ___argc, char *const *___argv, const char *__shortopts)
157 # if defined __need_getopt && defined __USE_POSIX2 \
158 && !defined __USE_POSIX_IMPLICITLY && !defined __USE_GNU
159 /* The GNU getopt has more functionality than the standard version. The
160 additional functionality can be disable at runtime. This redirection
161 helps to also do this at runtime. */
163 extern int __REDIRECT_NTH (getopt, (int ___argc, char *const *___argv,
164 const char *__shortopts),
167 extern int __posix_getopt (int ___argc, char *const *___argv,
168 const char *__shortopts) __THROW;
169 # define getopt __posix_getopt
172 #else /* not __GNU_LIBRARY__ */
173 WS_DLL_PUBLIC int getopt (int ___argc, char *const *___argv,
174 const char *__shortopts);
175 #endif /* __GNU_LIBRARY__ */
177 #ifndef __need_getopt
178 extern int getopt_long (int ___argc, char *const *___argv,
179 const char *__shortopts,
180 const struct option *__longopts, int *__longind)
182 extern int getopt_long_only (int ___argc, char *const *___argv,
183 const char *__shortopts,
184 const struct option *__longopts, int *__longind)
193 /* Make sure we later can get all the definitions and declarations. */
196 #endif /* getopt.h */