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lib: Update getopt.in.h from Gnulib with modifications. 

We can still avoid modifying the contents of this file during
configuration to simplify the build systems. Gnulib added replacements
for inclusions guards for Cygwin. Cygwin should not need getopt_long
replacement so this feature can be omitted.

<unistd.h> is conditionally included to avoid MSVC since it is not
available.

The definition for _GL_ARG_NONNULL was also copied into this file from
Gnulib since this stage is usually done during gnulib-tool.
This commit is contained in:
Jia Tan 2023-09-23 03:27:00 +08:00
parent cff05f8206
commit 7e884c00d0
1 changed files with 27 additions and 197 deletions
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224
lib/getopt.in.h
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@ -1,27 +1,26 @@
/* Declarations for getopt. /* Declarations for getopt.
Copyright (C) 1989-1994,1996-1999,2001,2003,2004,2005,2006,2007 Copyright (C) 1989-2023 Free Software Foundation, Inc.
Free Software Foundation, Inc. This file is part of gnulib.
This file is part of the GNU C Library. Unlike most of the getopt implementation, it is NOT shared
with the GNU C Library, which supplies a different version of
this file.
This program is free software; you can redistribute it and/or modify This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by it under the terms of the GNU Lesser General Public License as
the Free Software Foundation; either version 2.1, or (at your option) published by the Free Software Foundation; either version 2.1 of the
any later version. License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details. GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along You should have received a copy of the GNU Lesser General Public License
with this program; if not, write to the Free Software Foundation, along with this program. If not, see <https://www.gnu.org/licenses/>. */
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifndef _GETOPT_H #ifndef _GETOPT_H
#ifndef __need_getopt #define _GETOPT_H 1
# define _GETOPT_H 1
#endif
/* Standalone applications should #define __GETOPT_PREFIX to an /* Standalone applications should #define __GETOPT_PREFIX to an
identifier that prefixes the external functions and variables identifier that prefixes the external functions and variables
@ -31,198 +30,29 @@
identifiers so that they do not collide with the system functions identifiers so that they do not collide with the system functions
and variables. Renaming avoids problems with some compilers and and variables. Renaming avoids problems with some compilers and
linkers. */ linkers. */
#if defined __GETOPT_PREFIX && !defined __need_getopt #if defined __GETOPT_PREFIX
# include <stdlib.h> # include <stdlib.h>
# include <stdio.h> # include <stdio.h>
# ifndef _MSC_VER # ifndef _MSC_VER
# include <unistd.h> # include <unistd.h>
# endif # endif
# undef __need_getopt
# undef getopt
# undef getopt_long
# undef getopt_long_only
# undef optarg
# undef opterr
# undef optind
# undef optopt
# define __GETOPT_CONCAT(x, y) x ## y
# define __GETOPT_XCONCAT(x, y) __GETOPT_CONCAT (x, y)
# define __GETOPT_ID(y) __GETOPT_XCONCAT (__GETOPT_PREFIX, y)
# define getopt __GETOPT_ID (getopt)
# define getopt_long __GETOPT_ID (getopt_long)
# define getopt_long_only __GETOPT_ID (getopt_long_only)
# define optarg __GETOPT_ID (optarg)
# define opterr __GETOPT_ID (opterr)
# define optind __GETOPT_ID (optind)
# define optopt __GETOPT_ID (optopt)
#endif #endif
/* Standalone applications get correct prototypes for getopt_long and /* From Gnulib's lib/arg-nonnull.h: */
getopt_long_only; they declare "char **argv". libc uses prototypes /* _GL_ARG_NONNULL((n,...,m)) tells the compiler and static analyzer tools
with "char *const *argv" that are incorrect because getopt_long and that the values passed as arguments n, ..., m must be non-NULL pointers.
getopt_long_only can permute argv; this is required for backward n = 1 stands for the first argument, n = 2 for the second argument etc. */
compatibility (e.g., for LSB 2.0.1). #ifndef _GL_ARG_NONNULL
# if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || defined __clang__
This used to be `#if defined __GETOPT_PREFIX && !defined __need_getopt', # define _GL_ARG_NONNULL(params) __attribute__ ((__nonnull__ params))
but it caused redefinition warnings if both unistd.h and getopt.h were
included, since unistd.h includes getopt.h having previously defined
__need_getopt.
The only place where __getopt_argv_const is used is in definitions
of getopt_long and getopt_long_only below, but these are visible
only if __need_getopt is not defined, so it is quite safe to rewrite
the conditional as follows:
*/
#if !defined __need_getopt
# if defined __GETOPT_PREFIX
# define __getopt_argv_const /* empty */
# else # else
# define __getopt_argv_const const # define _GL_ARG_NONNULL(params)
# endif # endif
#endif #endif
/* If __GNU_LIBRARY__ is not already defined, either we are being used #include <getopt-cdefs.h>
standalone, or this is the first header included in the source file. #include <getopt-pfx-core.h>
If we are being used with glibc, we need to include <features.h>, but #include <getopt-pfx-ext.h>
that does not exist if we are standalone. So: if __GNU_LIBRARY__ is
not defined, include <ctype.h>, which will pull in <features.h> for us
if it's from glibc. (Why ctype.h? It's guaranteed to exist and it
doesn't flood the namespace with stuff the way some other headers do.) */
#if !defined __GNU_LIBRARY__
# include <ctype.h>
#endif
#ifndef __THROW #endif /* _GETOPT_H */
# ifndef __GNUC_PREREQ
# define __GNUC_PREREQ(maj, min) (0)
# endif
# if defined __cplusplus && __GNUC_PREREQ (2,8)
# define __THROW throw ()
# else
# define __THROW
# endif
#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
{
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
#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 '\1'. This behavior is specific to the GNU
`getopt'. If OPTS begins with `+', or POSIXLY_CORRECT is set in
the environment, then do not permute arguments. */
extern int getopt (int ___argc, char *const *___argv, const char *__shortopts)
__THROW;
#ifndef __need_getopt
extern int getopt_long (int ___argc, char *__getopt_argv_const *___argv,
const char *__shortopts,
const struct option *__longopts, int *__longind)
__THROW;
extern int getopt_long_only (int ___argc, char *__getopt_argv_const *___argv,
const char *__shortopts,
const struct option *__longopts, int *__longind)
__THROW;
#endif
#ifdef __cplusplus
}
#endif
/* Make sure we later can get all the definitions and declarations. */
#undef __need_getopt
#endif /* getopt.h */