GNU Radio 3.6.3.1 C++ API
getopt.h
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/* Declarations for getopt.
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Copyright (C) 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifndef _GETOPT_H
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#define _GETOPT_H 1
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#ifdef __cplusplus
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extern
"C"
{
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#endif
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/* For communication from `getopt' to the caller.
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When `getopt' finds an option that takes an argument,
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the argument value is returned here.
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Also, when `ordering' is RETURN_IN_ORDER,
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each non-option ARGV-element is returned here. */
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extern
char
*
optarg
;
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/* Index in ARGV of the next element to be scanned.
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This is used for communication to and from the caller
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and for communication between successive calls to `getopt'.
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On entry to `getopt', zero means this is the first call; initialize.
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When `getopt' returns EOF, this is the index of the first of the
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non-option elements that the caller should itself scan.
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Otherwise, `optind' communicates from one call to the next
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how much of ARGV has been scanned so far. */
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extern
int
optind
;
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/* Callers store zero here to inhibit the error message `getopt' prints
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for unrecognized options. */
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extern
int
opterr
;
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/* Set to an option character which was unrecognized. */
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extern
int
optopt
;
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/* Describe the long-named options requested by the application.
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The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
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of `struct option' terminated by an element containing a name which is
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zero.
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The field `has_arg' is:
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no_argument (or 0) if the option does not take an argument,
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required_argument (or 1) if the option requires an argument,
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optional_argument (or 2) if the option takes an optional argument.
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If the field `flag' is not NULL, it points to a variable that is set
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to the value given in the field `val' when the option is found, but
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left unchanged if the option is not found.
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To have a long-named option do something other than set an `int' to
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a compiled-in constant, such as set a value from `optarg', set the
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option's `flag' field to zero and its `val' field to a nonzero
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value (the equivalent single-letter option character, if there is
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one). For long options that have a zero `flag' field, `getopt'
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returns the contents of the `val' field. */
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struct
option
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{
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#if __STDC__
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const
char
*
name
;
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#else
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char
*
name
;
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#endif
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/* has_arg can't be an enum because some compilers complain about
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type mismatches in all the code that assumes it is an int. */
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int
has_arg
;
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int
*
flag
;
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int
val
;
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};
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/* Names for the values of the `has_arg' field of `struct option'. */
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#define no_argument 0
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#define required_argument 1
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#define optional_argument 2
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#if __STDC__
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#if defined(__GNU_LIBRARY__)
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/* Many other libraries have conflicting prototypes for getopt, with
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differences in the consts, in stdlib.h. To avoid compilation
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errors, only prototype getopt for the GNU C library. */
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extern
int
getopt
(
int
argc,
char
*
const
*argv,
const
char
*shortopts);
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#else
/* not __GNU_LIBRARY__ */
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extern
int
getopt
();
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#endif
/* not __GNU_LIBRARY__ */
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extern
int
getopt_long
(
int
argc,
char
*
const
*argv,
const
char
*shortopts,
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const
struct
option
*longopts,
int
*longind);
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extern
int
getopt_long_only
(
int
argc,
char
*
const
*argv,
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const
char
*shortopts,
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const
struct
option
*longopts,
int
*longind);
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/* Internal only. Users should not call this directly. */
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extern
int
_getopt_internal
(
int
argc,
char
*
const
*argv,
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const
char
*shortopts,
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const
struct
option
*longopts,
int
*longind,
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int
long_only);
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#else
/* not __STDC__ */
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extern
int
getopt
();
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extern
int
getopt_long
();
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extern
int
getopt_long_only
();
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extern
int
_getopt_internal
();
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#endif
/* not __STDC__ */
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#ifdef __cplusplus
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}
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#endif
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#endif
/* _GETOPT_H */
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gnuradio-core
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getopt.h
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