posix/getopt_int.h

   1 /* Internal declarations for getopt.
   2    Copyright (C) 1989-2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _GETOPT_INT_H
  20 #define _GETOPT_INT_H   1
  21
  22 extern int _getopt_internal (int ___argc, char *const *___argv,
  23                              const char *__shortopts,
  24                              const struct option *__longopts, int *__longind,
  25                              int __long_only, int posixly_correct);
  26
  27 \f
  28 /* Reentrant versions which can handle parsing multiple argument
  29    vectors at the same time.  */
  30
  31 /* Data type for reentrant functions.  */
  32 struct _getopt_data
  33 {
  34   /* These have exactly the same meaning as the corresponding global
  35      variables, except that they are used for the reentrant
  36      versions of getopt.  */
  37   int optind;
  38   int opterr;
  39   int optopt;
  40   char *optarg;
  41
  42   /* Internal members.  */
  43
  44   /* True if the internal members have been initialized.  */
  45   int __initialized;
  46
  47   /* The next char to be scanned in the option-element
  48      in which the last option character we returned was found.
  49      This allows us to pick up the scan where we left off.
  50
  51      If this is zero, or a null string, it means resume the scan
  52      by advancing to the next ARGV-element.  */
  53   char *__nextchar;
  54
  55   /* Describe how to deal with options that follow non-option ARGV-elements.
  56
  57      If the caller did not specify anything,
  58      the default is REQUIRE_ORDER if the environment variable
  59      POSIXLY_CORRECT is defined, PERMUTE otherwise.
  60
  61      REQUIRE_ORDER means don't recognize them as options;
  62      stop option processing when the first non-option is seen.
  63      This is what Unix does.
  64      This mode of operation is selected by either setting the environment
  65      variable POSIXLY_CORRECT, or using `+' as the first character
  66      of the list of option characters.
  67
  68      PERMUTE is the default.  We permute the contents of ARGV as we
  69      scan, so that eventually all the non-options are at the end.
  70      This allows options to be given in any order, even with programs
  71      that were not written to expect this.
  72
  73      RETURN_IN_ORDER is an option available to programs that were
  74      written to expect options and other ARGV-elements in any order
  75      and that care about the ordering of the two.  We describe each
  76      non-option ARGV-element as if it were the argument of an option
  77      with character code 1.  Using `-' as the first character of the
  78      list of option characters selects this mode of operation.
  79
  80      The special argument `--' forces an end of option-scanning regardless
  81      of the value of `ordering'.  In the case of RETURN_IN_ORDER, only
  82      `--' can cause `getopt' to return -1 with `optind' != ARGC.  */
  83
  84   enum
  85     {
  86       REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
  87     } __ordering;
  88
  89   /* If the POSIXLY_CORRECT environment variable is set.  */
  90   int __posixly_correct;
  91
  92
  93   /* Handle permutation of arguments.  */
  94
  95   /* Describe the part of ARGV that contains non-options that have
  96      been skipped.  `first_nonopt' is the index in ARGV of the first
  97      of them; `last_nonopt' is the index after the last of them.  */
  98
  99   int __first_nonopt;
 100   int __last_nonopt;
 101
 102 #if defined _LIBC && defined USE_NONOPTION_FLAGS
 103   int __nonoption_flags_max_len;
 104   int __nonoption_flags_len;
 105 # endif
 106 };
 107
 108 /* The initializer is necessary to set OPTIND and OPTERR to their
 109    default values and to clear the initialization flag.  */
 110 #define _GETOPT_DATA_INITIALIZER        { 1, 1 }
 111
 112 extern int _getopt_internal_r (int ___argc, char *const *___argv,
 113                                const char *__shortopts,
 114                                const struct option *__longopts, int *__longind,
 115                                int __long_only, struct _getopt_data *__data,
 116                                int posixly_correct);
 117
 118 extern int _getopt_long_r (int ___argc, char *const *___argv,
 119                            const char *__shortopts,
 120                            const struct option *__longopts, int *__longind,
 121                            struct _getopt_data *__data);
 122
 123 extern int _getopt_long_only_r (int ___argc, char *const *___argv,
 124                                 const char *__shortopts,
 125                                 const struct option *__longopts,
 126                                 int *__longind,
 127                                 struct _getopt_data *__data);
 128
 129 #endif /* getopt_int.h */