trunk/compat/getopt.h

/* Declarations for getopt.
   Copyright (C) 1989,90,91,92,93,94,96,97,98 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef _GETOPT_H

#ifndef __need_getopt
# define _GETOPT_H 1
#endif

#ifdef  __cplusplus
extern "C" {
#endif

/* For communication from `getopt' to the caller.
   When `getopt' finds an option that takes an argument,
   the argument value is returned here.
   Also, when `ordering' is RETURN_IN_ORDER,
   each non-option ARGV-element is returned here.  */

extern char *optarg;

/* Index in ARGV of the next element to be scanned.
   This is used for communication to and from the caller
   and for communication between successive calls to `getopt'.

   On entry to `getopt', zero means this is the first call; initialize.

   When `getopt' returns -1, this is the index of the first of the
   non-option elements that the caller should itself scan.

   Otherwise, `optind' communicates from one call to the next
   how much of ARGV has been scanned so far.  */

extern int optind;

/* Callers store zero here to inhibit the error message `getopt' prints
   for unrecognized options.  */

extern int opterr;

/* Set to an option character which was unrecognized.  */

extern int optopt;

#ifndef __need_getopt
/* Describe the long-named options requested by the application.
   The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
   of `struct option' terminated by an element containing a name which is
   zero.

   The field `has_arg' is:
   no_argument          (or 0) if the option does not take an argument,
   required_argument    (or 1) if the option requires an argument,
   optional_argument    (or 2) if the option takes an optional argument.

   If the field `flag' is not NULL, it points to a variable that is set
   to the value given in the field `val' when the option is found, but
   left unchanged if the option is not found.

   To have a long-named option do something other than set an `int' to
   a compiled-in constant, such as set a value from `optarg', set the
   option's `flag' field to zero and its `val' field to a nonzero
   value (the equivalent single-letter option character, if there is
   one).  For long options that have a zero `flag' field, `getopt'
   returns the contents of the `val' field.  */

struct option
{
# if defined __STDC__ && __STDC__
  const char *name;
# else
  char *name;
# endif
  /* has_arg can't be an enum because some compilers complain about
     type mismatches in all the code that assumes it is an int.  */
  int has_arg;
  int *flag;
  int val;
};

/* Names for the values of the `has_arg' field of `struct option'.  */

# define no_argument            0
# define required_argument      1
# define optional_argument      2
#endif  /* need getopt */


/* Get definitions and prototypes for functions to process the
   arguments in ARGV (ARGC of them, minus the program name) for
   options given in OPTS.

   Return the option character from OPTS just read.  Return -1 when
   there are no more options.  For unrecognized options, or options
   missing arguments, `optopt' is set to the option letter, and '?' is
   returned.

   The OPTS string is a list of characters which are recognized option
   letters, optionally followed by colons, specifying that that letter
   takes an argument, to be placed in `optarg'.

   If a letter in OPTS is followed by two colons, its argument is
   optional.  This behavior is specific to the GNU `getopt'.

   The argument `--' causes premature termination of argument
   scanning, explicitly telling `getopt' that there are no more
   options.

   If OPTS begins with `--', then non-option arguments are treated as
   arguments to the option '\0'.  This behavior is specific to the GNU
   `getopt'.  */

#if defined __STDC__ && __STDC__
# ifdef __GNU_LIBRARY__
/* Many other libraries have conflicting prototypes for getopt, with
   differences in the consts, in stdlib.h.  To avoid compilation
   errors, only prototype getopt for the GNU C library.  */
extern int getopt (int __argc, char *const *__argv, const char *__shortopts);
# else /* not __GNU_LIBRARY__ */
extern int getopt ();
# endif /* __GNU_LIBRARY__ */

# ifndef __need_getopt
extern int getopt_long (int __argc, char *const *__argv, const char *__shortopts,
                        const struct option *__longopts, int *__longind);
extern int getopt_long_only (int __argc, char *const *__argv,
                             const char *__shortopts,
                             const struct option *__longopts, int *__longind);

/* Internal only.  Users should not call this directly.  */
extern int _getopt_internal (int __argc, char *const *__argv,
                             const char *__shortopts,
                             const struct option *__longopts, int *__longind,
                             int __long_only);
# endif
#else /* not __STDC__ */
extern int getopt ();
# ifndef __need_getopt
extern int getopt_long ();
extern int getopt_long_only ();

extern int _getopt_internal ();
# endif
#endif /* __STDC__ */

#ifdef  __cplusplus
}
#endif

/* Make sure we later can get all the definitions and declarations.  */
#undef __need_getopt

#endif /* getopt.h */
1	/* Declarations for getopt.
2	Copyright (C) 1989,90,91,92,93,94,96,97,98 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 Library General Public License as
7	published by the Free Software Foundation; either version 2 of the
8	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	Library General Public License for more details.
14
15	You should have received a copy of the GNU Library General Public
16	License along with the GNU C Library; see the file COPYING.LIB. If not,
17	write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18	Boston, MA 02111-1307, USA. */
19
20	#ifndef _GETOPT_H
21
22	#ifndef __need_getopt
23	# define _GETOPT_H 1
24	#endif
25
26	#ifdef __cplusplus
27	extern "C" {
28	#endif
29
30	/* For communication from `getopt' to the caller.
31	When `getopt' finds an option that takes an argument,
32	the argument value is returned here.
33	Also, when `ordering' is RETURN_IN_ORDER,
34	each non-option ARGV-element is returned here. */
35
36	extern char *optarg;
37
38	/* Index in ARGV of the next element to be scanned.
39	This is used for communication to and from the caller
40	and for communication between successive calls to `getopt'.
41
42	On entry to `getopt', zero means this is the first call; initialize.
43
44	When `getopt' returns -1, this is the index of the first of the
45	non-option elements that the caller should itself scan.
46
47	Otherwise, `optind' communicates from one call to the next
48	how much of ARGV has been scanned so far. */
49
50	extern int optind;
51
52	/* Callers store zero here to inhibit the error message `getopt' prints
53	for unrecognized options. */
54
55	extern int opterr;
56
57	/* Set to an option character which was unrecognized. */
58
59	extern int optopt;
60
61	#ifndef __need_getopt
62	/* Describe the long-named options requested by the application.
63	The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
64	of `struct option' terminated by an element containing a name which is
65	zero.
66
67	The field `has_arg' is:
68	no_argument (or 0) if the option does not take an argument,
69	required_argument (or 1) if the option requires an argument,
70	optional_argument (or 2) if the option takes an optional argument.
71
72	If the field `flag' is not NULL, it points to a variable that is set
73	to the value given in the field `val' when the option is found, but
74	left unchanged if the option is not found.
75
76	To have a long-named option do something other than set an `int' to
77	a compiled-in constant, such as set a value from `optarg', set the
78	option's `flag' field to zero and its `val' field to a nonzero
79	value (the equivalent single-letter option character, if there is
80	one). For long options that have a zero `flag' field, `getopt'
81	returns the contents of the `val' field. */
82
83	struct option
84	{
85	# if defined __STDC__ && __STDC__
86	const char *name;
87	# else
88	char *name;
89	# endif
90	/* has_arg can't be an enum because some compilers complain about
91	type mismatches in all the code that assumes it is an int. */
92	int has_arg;
93	int *flag;
94	int val;
95	};
96
97	/* Names for the values of the `has_arg' field of `struct option'. */
98
99	# define no_argument 0
100	# define required_argument 1
101	# define optional_argument 2
102	#endif /* need getopt */
103
104
105	/* Get definitions and prototypes for functions to process the
106	arguments in ARGV (ARGC of them, minus the program name) for
107	options given in OPTS.
108
109	Return the option character from OPTS just read. Return -1 when
110	there are no more options. For unrecognized options, or options
111	missing arguments, `optopt' is set to the option letter, and '?' is
112	returned.
113
114	The OPTS string is a list of characters which are recognized option
115	letters, optionally followed by colons, specifying that that letter
116	takes an argument, to be placed in `optarg'.
117
118	If a letter in OPTS is followed by two colons, its argument is
119	optional. This behavior is specific to the GNU `getopt'.
120
121	The argument `--' causes premature termination of argument
122	scanning, explicitly telling `getopt' that there are no more
123	options.
124
125	If OPTS begins with `--', then non-option arguments are treated as
126	arguments to the option '\0'. This behavior is specific to the GNU
127	`getopt'. */
128
129	#if defined __STDC__ && __STDC__
130	# ifdef __GNU_LIBRARY__
131	/* Many other libraries have conflicting prototypes for getopt, with
132	differences in the consts, in stdlib.h. To avoid compilation
133	errors, only prototype getopt for the GNU C library. */
134	extern int getopt (int __argc, char const __argv, const char *__shortopts);
135	# else /* not __GNU_LIBRARY__ */
136	extern int getopt ();
137	# endif /* __GNU_LIBRARY__ */
138
139	# ifndef __need_getopt
140	extern int getopt_long (int __argc, char const __argv, const char *__shortopts,
141	const struct option __longopts, int __longind);
142	extern int getopt_long_only (int __argc, char const __argv,
143	const char *__shortopts,
144	const struct option __longopts, int __longind);
145
146	/* Internal only. Users should not call this directly. */
147	extern int _getopt_internal (int __argc, char const __argv,
148	const char *__shortopts,
149	const struct option __longopts, int __longind,
150	int __long_only);
151	# endif
152	#else /* not __STDC__ */
153	extern int getopt ();
154	# ifndef __need_getopt
155	extern int getopt_long ();
156	extern int getopt_long_only ();
157
158	extern int _getopt_internal ();
159	# endif
160	#endif /* __STDC__ */
161
162	#ifdef __cplusplus
163	}
164	#endif
165
166	/* Make sure we later can get all the definitions and declarations. */
167	#undef __need_getopt
168
169	#endif /* getopt.h */
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