Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | Download | RSS feed

  1. /* Declarations for getopt.
  2.    Copyright (C) 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
  3.  
  4.    This program is free software; you can redistribute it and/or modify it
  5.    under the terms of the GNU General Public License as published by the
  6.    Free Software Foundation; either version 2, or (at your option) any
  7.    later version.
  8.  
  9.    This program is distributed in the hope that it will be useful,
  10.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12.    GNU General Public License for more details.
  13.  
  14.    You should have received a copy of the GNU General Public License
  15.    along with this program; if not, write to the Free Software
  16.    Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  17.  
  18. #ifndef _GETOPT_H
  19. #define _GETOPT_H 1
  20.  
  21. #ifdef  __cplusplus
  22. extern "C" {
  23. #endif
  24.  
  25. /* For communication from `getopt' to the caller.
  26.    When `getopt' finds an option that takes an argument,
  27.    the argument value is returned here.
  28.    Also, when `ordering' is RETURN_IN_ORDER,
  29.    each non-option ARGV-element is returned here.  */
  30.  
  31. extern char *optarg;
  32.  
  33. /* Index in ARGV of the next element to be scanned.
  34.    This is used for communication to and from the caller
  35.    and for communication between successive calls to `getopt'.
  36.  
  37.    On entry to `getopt', zero means this is the first call; initialize.
  38.  
  39.    When `getopt' returns EOF, this is the index of the first of the
  40.    non-option elements that the caller should itself scan.
  41.  
  42.    Otherwise, `optind' communicates from one call to the next
  43.    how much of ARGV has been scanned so far.  */
  44.  
  45. extern int optind;
  46.  
  47. /* Callers store zero here to inhibit the error message `getopt' prints
  48.    for unrecognized options.  */
  49.  
  50. extern int opterr;
  51.  
  52. /* Set to an option character which was unrecognized.  */
  53.  
  54. extern int optopt;
  55.  
  56. /* Describe the long-named options requested by the application.
  57.    The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
  58.    of `struct option' terminated by an element containing a name which is
  59.    zero.
  60.  
  61.    The field `has_arg' is:
  62.    no_argument          (or 0) if the option does not take an argument,
  63.    required_argument    (or 1) if the option requires an argument,
  64.    optional_argument    (or 2) if the option takes an optional argument.
  65.  
  66.    If the field `flag' is not NULL, it points to a variable that is set
  67.    to the value given in the field `val' when the option is found, but
  68.    left unchanged if the option is not found.
  69.  
  70.    To have a long-named option do something other than set an `int' to
  71.    a compiled-in constant, such as set a value from `optarg', set the
  72.    option's `flag' field to zero and its `val' field to a nonzero
  73.    value (the equivalent single-letter option character, if there is
  74.    one).  For long options that have a zero `flag' field, `getopt'
  75.    returns the contents of the `val' field.  */
  76.  
  77. struct option
  78. {
  79. #if     __STDC__
  80.   const char *name;
  81. #else
  82.   char *name;
  83. #endif
  84.   /* has_arg can't be an enum because some compilers complain about
  85.      type mismatches in all the code that assumes it is an int.  */
  86.   int has_arg;
  87.   int *flag;
  88.   int val;
  89. };
  90.  
  91. /* Names for the values of the `has_arg' field of `struct option'.  */
  92.  
  93. #define no_argument             0
  94. #define required_argument       1
  95. #define optional_argument       2
  96.  
  97. #if __STDC__ || defined(PROTO)
  98. #if defined(__GNU_LIBRARY__)
  99. /* Many other libraries have conflicting prototypes for getopt, with
  100.    differences in the consts, in stdlib.h.  To avoid compilation
  101.    errors, only prototype getopt for the GNU C library.  */
  102. extern int getopt (int argc, char *const *argv, const char *shortopts);
  103. #endif /* not __GNU_LIBRARY__ */
  104. extern int getopt_long (int argc, char *const *argv, const char *shortopts,
  105.                         const struct option *longopts, int *longind);
  106. extern int getopt_long_only (int argc, char *const *argv,
  107.                              const char *shortopts,
  108.                              const struct option *longopts, int *longind);
  109.  
  110. /* Internal only.  Users should not call this directly.  */
  111. extern int _getopt_internal (int argc, char *const *argv,
  112.                              const char *shortopts,
  113.                              const struct option *longopts, int *longind,
  114.                              int long_only);
  115. #else /* not __STDC__ */
  116. extern int getopt ();
  117. extern int getopt_long ();
  118. extern int getopt_long_only ();
  119.  
  120. extern int _getopt_internal ();
  121. #endif /* not __STDC__ */
  122.  
  123. #ifdef  __cplusplus
  124. }
  125. #endif
  126.  
  127. #endif /* _GETOPT_H */
  128.