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/* $Id: getopt.h 4578 2013-08-02 02:31:44Z ming $ */
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/* Declarations for pj_getopt.
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Copyright (C) 1989,90,91,92,93,94,96,97,98 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef __PJ_GETOPT_H__
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#define __PJ_GETOPT_H__ 1
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* @brief Compile time settings
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* @defgroup PJLIB_UTIL_GETOPT Getopt
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/* For communication from `pj_getopt' to the caller.
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When `pj_getopt' finds an option that takes an argument,
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the argument value is returned here.
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Also, when `ordering' is RETURN_IN_ORDER,
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each non-option ARGV-element is returned here. */
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extern char *pj_optarg;
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/* Index in ARGV of the next element to be scanned.
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This is used for communication to and from the caller
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and for communication between successive calls to `pj_getopt'.
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On entry to `pj_getopt', zero means this is the first call; initialize.
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When `pj_getopt' returns -1, this is the index of the first of the
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non-option elements that the caller should itself scan.
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Otherwise, `pj_optind' communicates from one call to the next
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how much of ARGV has been scanned so far. */
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/* Set to an option character which was unrecognized. */
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/* Describe the long-named options requested by the application.
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The LONG_OPTIONS argument to pj_getopt_long or pj_getopt_long_only is a vector
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of `struct pj_getopt_option' terminated by an element containing a name which is
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The field `has_arg' is:
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no_argument (or 0) if the option does not take an argument,
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required_argument (or 1) if the option requires an argument,
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optional_argument (or 2) if the option takes an optional argument.
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If the field `flag' is not NULL, it points to a variable that is set
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to the value given in the field `val' when the option is found, but
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left unchanged if the option is not found.
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To have a long-named option do something other than set an `int' to
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a compiled-in constant, such as set a value from `pj_optarg', set the
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option's `flag' field to zero and its `val' field to a nonzero
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value (the equivalent single-letter option character, if there is
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one). For long options that have a zero `flag' field, `pj_getopt'
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returns the contents of the `val' field. */
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struct pj_getopt_option
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/* has_arg can't be an enum because some compilers complain about
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type mismatches in all the code that assumes it is an int. */
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/* Names for the values of the `has_arg' field of `struct pj_getopt_option'. */
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# define no_argument 0
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# define required_argument 1
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# define optional_argument 2
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/* Get definitions and prototypes for functions to process the
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arguments in ARGV (ARGC of them, minus the program name) for
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options given in OPTS.
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Return the option character from OPTS just read. Return -1 when
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there are no more options. For unrecognized options, or options
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missing arguments, `pj_optopt' is set to the option letter, and '?' is
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The OPTS string is a list of characters which are recognized option
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letters, optionally followed by colons, specifying that that letter
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takes an argument, to be placed in `pj_optarg'.
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If a letter in OPTS is followed by two colons, its argument is
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optional. This behavior is specific to the GNU `pj_getopt'.
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The argument `--' causes premature termination of argument
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scanning, explicitly telling `pj_getopt' that there are no more
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If OPTS begins with `--', then non-option arguments are treated as
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arguments to the option '\0'. This behavior is specific to the GNU
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int pj_getopt (int argc, char *const *argv, const char *shortopts);
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int pj_getopt_long (int argc, char *const *argv, const char *options,
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const struct pj_getopt_option *longopts, int *longind);
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int pj_getopt_long_only (int argc, char *const *argv,
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const char *shortopts,
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const struct pj_getopt_option *longopts, int *longind);
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#endif /* pj_getopt.h */