"Fossies" - the Fresh Open Source Software Archive

Member "jpeginfo-1.6.1/getopt.h" (15 Jan 1998, 4455 Bytes) of package /linux/privat/old/jpeginfo-1.6.1.tar.gz:

    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 /* $CVSid: @(#)getopt.h 1.7 94/09/21 $ */
   19 
   20 #ifndef _GETOPT_H
   21 #define _GETOPT_H 1
   22 
   23 #ifdef  __cplusplus
   24 extern "C" {
   25 #endif
   26 
   27 /* For communication from `getopt' to the caller.
   28    When `getopt' finds an option that takes an argument,
   29    the argument value is returned here.
   30    Also, when `ordering' is RETURN_IN_ORDER,
   31    each non-option ARGV-element is returned here.  */
   32 
   33 extern char *optarg;
   34 
   35 /* Index in ARGV of the next element to be scanned.
   36    This is used for communication to and from the caller
   37    and for communication between successive calls to `getopt'.
   38 
   39    On entry to `getopt', zero means this is the first call; initialize.
   40 
   41    When `getopt' returns EOF, this is the index of the first of the
   42    non-option elements that the caller should itself scan.
   43 
   44    Otherwise, `optind' communicates from one call to the next
   45    how much of ARGV has been scanned so far.  */
   46 
   47 extern int optind;
   48 
   49 /* Callers store zero here to inhibit the error message `getopt' prints
   50    for unrecognized options.  */
   51 
   52 extern int opterr;
   53 
   54 /* Set to an option character which was unrecognized.  */
   55 
   56 extern int optopt;
   57 
   58 /* Describe the long-named options requested by the application.
   59    The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
   60    of `struct option' terminated by an element containing a name which is
   61    zero.
   62 
   63    The field `has_arg' is:
   64    no_argument      (or 0) if the option does not take an argument,
   65    required_argument    (or 1) if the option requires an argument,
   66    optional_argument    (or 2) if the option takes an optional argument.
   67 
   68    If the field `flag' is not NULL, it points to a variable that is set
   69    to the value given in the field `val' when the option is found, but
   70    left unchanged if the option is not found.
   71 
   72    To have a long-named option do something other than set an `int' to
   73    a compiled-in constant, such as set a value from `optarg', set the
   74    option's `flag' field to zero and its `val' field to a nonzero
   75    value (the equivalent single-letter option character, if there is
   76    one).  For long options that have a zero `flag' field, `getopt'
   77    returns the contents of the `val' field.  */
   78 
   79 struct option
   80 {
   81 #if __STDC__
   82   const char *name;
   83 #else
   84   char *name;
   85 #endif
   86   /* has_arg can't be an enum because some compilers complain about
   87      type mismatches in all the code that assumes it is an int.  */
   88   int has_arg;
   89   int *flag;
   90   int val;
   91 };
   92 
   93 /* Names for the values of the `has_arg' field of `struct option'.  */
   94 
   95 #define no_argument     0
   96 #define required_argument   1
   97 #define optional_argument   2
   98 
   99 #if __STDC__
  100 #if defined(__GNU_LIBRARY__)
  101 /* Many other libraries have conflicting prototypes for getopt, with
  102    differences in the consts, in stdlib.h.  To avoid compilation
  103    errors, only prototype getopt for the GNU C library.  */
  104 extern int getopt (int argc, char *const *argv, const char *shortopts);
  105 #else /* not __GNU_LIBRARY__ */
  106 extern int getopt ();
  107 #endif /* not __GNU_LIBRARY__ */
  108 extern int getopt_long (int argc, char *const *argv, const char *shortopts,
  109                 const struct option *longopts, int *longind);
  110 extern int getopt_long_only (int argc, char *const *argv,
  111                  const char *shortopts,
  112                      const struct option *longopts, int *longind);
  113 
  114 /* Internal only.  Users should not call this directly.  */
  115 extern int _getopt_internal (int argc, char *const *argv,
  116                  const char *shortopts,
  117                      const struct option *longopts, int *longind,
  118                  int long_only);
  119 #else /* not __STDC__ */
  120 extern int getopt ();
  121 extern int getopt_long ();
  122 extern int getopt_long_only ();
  123 
  124 extern int _getopt_internal ();
  125 #endif /* not __STDC__ */
  126 
  127 #ifdef  __cplusplus
  128 }
  129 #endif
  130 
  131 #endif /* _GETOPT_H */