/* Declarations for getopt. Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1996, 1997, 1998, 2000 Free Software Foundation, Inc. NOTE: The canonical source of this file is maintained with the GNU C Library. Bugs can be reported to bug-glibc@gnu.org. This program 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 2, or (at your option) any later version. This program 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 this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef _GETOPT_H #define _GETOPT_H 1 #include #if HAVE_UNISTD_H /* Declares getopt, if present */ #include #endif #ifdef __cplusplus extern "C" { #endif /* We're building this with a C++ compiler, essentially. Such compilers are not required to define __STDC__, but the path we should follow, below, is indeed that marked by __STDC__. We don't want to force a definition of __STDC__ (though that works), because (a) that feels bad, and (b) some compilers perfectly reasonable complain bitterly about it. So define THIS_IS__STDC__, and replace occurrences of __STDC__ throughout with that. That means that all of the occurrences of THIS_IS__STDC__ in this file and in getopt_long.c are redundant, but I'm leaving them here in case it becomes necessary to do cleverer things with it than simply define it to be 1, and also as a sort of warped documentation. */ #define THIS_IS__STDC__ 1 #if !HAVE_DECL_GETOPT /* 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; #endif /* ifndef HAVE_DECL_GETOPT */ #if !HAVE_DECL_GETOPT_LONG /* 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 (THIS_IS__STDC__) && THIS_IS__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 /* #if !HAVE_DECL_GETOPT_LONG */ #if defined (THIS_IS__STDC__) && THIS_IS__STDC__ /* HAVE_DECL_* is a three-state macro: undefined, 0 or 1. If it is undefined, we haven't run the autoconf check so provide the declaration without arguments. If it is 0, we checked and failed to find the declaration so provide a fully prototyped one. If it is 1, we found it so don't provide any declaration at all. */ #if defined (__GNU_LIBRARY__) || (defined (HAVE_DECL_GETOPT) && !HAVE_DECL_GETOPT) /* 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__ */ # if !defined (HAVE_DECL_GETOPT) extern int getopt (); # endif #endif /* __GNU_LIBRARY__ */ #if !HAVE_DECL_GETOPT_LONG 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 /* HAVE_DECL_GETOPT_LONG */ #else /* not THIS_IS__STDC__ */ #if !HAVE_DECL_GETOPT extern int getopt (); #endif /* HAVE_DECL_GETOPT */ #if !HAVE_DECL_GETOPT_LONG extern int getopt_long (); extern int getopt_long_only (); extern int _getopt_internal (); #endif /* HAVE_DECL_GETOPT_LONG */ #endif /* THIS_IS__STDC__ */ #ifdef __cplusplus } #endif #endif /* getopt.h */