release/src/router/pptpd/our_getopt.h

   1 /*
   2  * our_getopt.h
   3  *
   4  * Header file for the getopt_long deprived.
   5  *
   6  * $Id: our_getopt.h,v 1.1.1.1 2002/06/21 08:52:00 fenix_nl Exp $
   7  */
   8
   9 /* Declarations for getopt.
  10    Copyright (C) 1989,90,91,92,93,94,96,97,98 Free Software Foundation, Inc.
  11    This file is part of the GNU C Library.
  12
  13    The GNU C Library is free software; you can redistribute it and/or
  14    modify it under the terms of the GNU Library General Public License as
  15    published by the Free Software Foundation; either version 2 of the
  16    License, or (at your option) any later version.
  17
  18    The GNU C Library is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21    Library General Public License for more details.
  22
  23    You should have received a copy of the GNU Library General Public
  24    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  25    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  26    Boston, MA 02111-1307, USA.  */
  27
  28 #ifndef _GETOPT_H
  29
  30 #ifndef __need_getopt
  31 # define _GETOPT_H 1
  32 #endif
  33
  34 #ifdef  __cplusplus
  35 extern "C" {
  36 #endif
  37
  38 /* For communication from `getopt' to the caller.
  39    When `getopt' finds an option that takes an argument,
  40    the argument value is returned here.
  41    Also, when `ordering' is RETURN_IN_ORDER,
  42    each non-option ARGV-element is returned here.  */
  43
  44 extern char *optarg;
  45
  46 /* Index in ARGV of the next element to be scanned.
  47    This is used for communication to and from the caller
  48    and for communication between successive calls to `getopt'.
  49
  50    On entry to `getopt', zero means this is the first call; initialize.
  51
  52    When `getopt' returns -1, this is the index of the first of the
  53    non-option elements that the caller should itself scan.
  54
  55    Otherwise, `optind' communicates from one call to the next
  56    how much of ARGV has been scanned so far.  */
  57
  58 extern int optind;
  59
  60 /* Callers store zero here to inhibit the error message `getopt' prints
  61    for unrecognized options.  */
  62
  63 extern int opterr;
  64
  65 /* Set to an option character which was unrecognized.  */
  66
  67 extern int optopt;
  68
  69 #ifndef __need_getopt
  70 /* Describe the long-named options requested by the application.
  71    The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
  72    of `struct option' terminated by an element containing a name which is
  73    zero.
  74
  75    The field `has_arg' is:
  76    no_argument          (or 0) if the option does not take an argument,
  77    required_argument    (or 1) if the option requires an argument,
  78    optional_argument    (or 2) if the option takes an optional argument.
  79
  80    If the field `flag' is not NULL, it points to a variable that is set
  81    to the value given in the field `val' when the option is found, but
  82    left unchanged if the option is not found.
  83
  84    To have a long-named option do something other than set an `int' to
  85    a compiled-in constant, such as set a value from `optarg', set the
  86    option's `flag' field to zero and its `val' field to a nonzero
  87    value (the equivalent single-letter option character, if there is
  88    one).  For long options that have a zero `flag' field, `getopt'
  89    returns the contents of the `val' field.  */
  90
  91 struct option
  92 {
  93 # if defined __STDC__ && __STDC__
  94   const char *name;
  95 # else
  96   char *name;
  97 # endif
  98   /* has_arg can't be an enum because some compilers complain about
  99      type mismatches in all the code that assumes it is an int.  */
 100   int has_arg;
 101   int *flag;
 102   int val;
 103 };
 104
 105 /* Names for the values of the `has_arg' field of `struct option'.  */
 106
 107 # define no_argument            0
 108 # define required_argument      1
 109 # define optional_argument      2
 110 #endif  /* need getopt */
 111
 112
 113 /* Get definitions and prototypes for functions to process the
 114    arguments in ARGV (ARGC of them, minus the program name) for
 115    options given in OPTS.
 116
 117    Return the option character from OPTS just read.  Return -1 when
 118    there are no more options.  For unrecognized options, or options
 119    missing arguments, `optopt' is set to the option letter, and '?' is
 120    returned.
 121
 122    The OPTS string is a list of characters which are recognized option
 123    letters, optionally followed by colons, specifying that that letter
 124    takes an argument, to be placed in `optarg'.
 125
 126    If a letter in OPTS is followed by two colons, its argument is
 127    optional.  This behavior is specific to the GNU `getopt'.
 128
 129    The argument `--' causes premature termination of argument
 130    scanning, explicitly telling `getopt' that there are no more
 131    options.
 132
 133    If OPTS begins with `--', then non-option arguments are treated as
 134    arguments to the option '\0'.  This behavior is specific to the GNU
 135    `getopt'.  */
 136
 137 #if defined __STDC__ && __STDC__
 138 # ifdef __GNU_LIBRARY__
 139 /* Many other libraries have conflicting prototypes for getopt, with
 140    differences in the consts, in stdlib.h.  To avoid compilation
 141    errors, only prototype getopt for the GNU C library.  */
 142 extern int getopt (int __argc, char *const *__argv, const char *__shortopts);
 143 # else /* not __GNU_LIBRARY__ */
 144 extern int getopt ();
 145 # endif /* __GNU_LIBRARY__ */
 146
 147 # ifndef __need_getopt
 148 extern int getopt_long (int __argc, char *const *__argv, const char *__shortopts,
 149                         const struct option *__longopts, int *__longind);
 150 extern int getopt_long_only (int __argc, char *const *__argv,
 151                              const char *__shortopts,
 152                              const struct option *__longopts, int *__longind);
 153
 154 /* Internal only.  Users should not call this directly.  */
 155 extern int _getopt_internal (int __argc, char *const *__argv,
 156                              const char *__shortopts,
 157                              const struct option *__longopts, int *__longind,
 158                              int __long_only);
 159 # endif
 160 #else /* not __STDC__ */
 161 extern int getopt ();
 162 # ifndef __need_getopt
 163 extern int getopt_long ();
 164 extern int getopt_long_only ();
 165
 166 extern int _getopt_internal ();
 167 # endif
 168 #endif /* __STDC__ */
 169
 170 #ifdef  __cplusplus
 171 }
 172 #endif
 173
 174 /* Make sure we later can get all the definitions and declarations.  */
 175 #undef __need_getopt
 176
 177 #endif /* getopt.h */