mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-11 09:20:51 +00:00
78 lines
3.0 KiB
C
78 lines
3.0 KiB
C
/* Declarations for getopt (GNU extensions).
|
|
Copyright (C) 1989-2021 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library and is also part of gnulib.
|
|
Patches to this file should be submitted to both projects.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 3 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
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _GETOPT_EXT_H
|
|
#define _GETOPT_EXT_H 1
|
|
|
|
/* This header should not be used directly; include getopt.h instead.
|
|
Unlike most bits headers, it does not have a protective #error,
|
|
because the guard macro for getopt.h in gnulib is not fixed. */
|
|
|
|
__BEGIN_DECLS
|
|
|
|
/* 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
|
|
{
|
|
const char *name;
|
|
/* 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
|
|
|
|
extern int getopt_long (int ___argc, char *__getopt_argv_const *___argv,
|
|
const char *__shortopts,
|
|
const struct option *__longopts, int *__longind)
|
|
__THROW _GL_ARG_NONNULL ((2, 3));
|
|
extern int getopt_long_only (int ___argc, char *__getopt_argv_const *___argv,
|
|
const char *__shortopts,
|
|
const struct option *__longopts, int *__longind)
|
|
__THROW _GL_ARG_NONNULL ((2, 3));
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* _GETOPT_EXT_H */
|