61d5ffaf10
issues in these areas:
.h's installed
.hP's installed
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files needed in ~/legal for copyleft reasons.
130 lines
4.8 KiB
C++
130 lines
4.8 KiB
C++
/* Getopt for GNU.
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Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc.
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(Modified by Douglas C. Schmidt for use with GNU G++.)
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This file is part of the GNU C++ Library. This library is free
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software; you can redistribute it and/or modify it under the terms of
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the GNU Library General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your
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option) any later version. This library is distributed in the hope
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that it will be useful, but WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the GNU 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 this library; if not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* This version of `getopt' appears to the caller like standard Unix `getopt'
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but it behaves differently for the user, since it allows the user
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to intersperse the options with the other arguments.
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As `getopt' works, it permutes the elements of `argv' so that,
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when it is done, all the options precede everything else. Thus
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all application programs are extended to handle flexible argument order.
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Setting the environment variable _POSIX_OPTION_ORDER disables permutation.
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Then the behavior is completely standard.
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GNU application programs can use a third alternative mode in which
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they can distinguish the relative order of options and other arguments. */
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#ifndef GetOpt_h
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#ifdef __GNUG__
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#pragma interface
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#endif
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#define GetOpt_h 1
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#include <std.h>
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#include <stdio.h>
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class GetOpt
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{
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private:
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/* The next char to be scanned in the option-element
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in which the last option character we returned was found.
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This allows us to pick up the scan where we left off.
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If this is zero, or a null string, it means resume the scan
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by advancing to the next ARGV-element. */
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static char *nextchar;
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/* Describe how to deal with options that follow non-option ARGV-elements.
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UNSPECIFIED means the caller did not specify anything;
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the default is then REQUIRE_ORDER if the environment variable
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_OPTIONS_FIRST is defined, PERMUTE otherwise.
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REQUIRE_ORDER means don't recognize them as options.
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Stop option processing when the first non-option is seen.
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This is what Unix does.
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PERMUTE is the default. We permute the contents of `argv' as we scan,
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so that eventually all the options are at the end. This allows options
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to be given in any order, even with programs that were not written to
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expect this.
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RETURN_IN_ORDER is an option available to programs that were written
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to expect options and other ARGV-elements in any order and that care about
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the ordering of the two. We describe each non-option ARGV-element
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as if it were the argument of an option with character code zero.
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Using `-' as the first character of the list of option characters
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requests this mode of operation.
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The special argument `--' forces an end of option-scanning regardless
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of the value of `ordering'. In the case of RETURN_IN_ORDER, only
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`--' can cause `getopt' to return EOF with `optind' != ARGC. */
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enum OrderingEnum { REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER };
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OrderingEnum ordering;
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/* Handle permutation of arguments. */
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/* Describe the part of ARGV that contains non-options that have
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been skipped. `first_nonopt' is the index in ARGV of the first of them;
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`last_nonopt' is the index after the last of them. */
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static int first_nonopt;
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static int last_nonopt;
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void exchange (char **argv);
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public:
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/* For communication from `getopt' to the caller.
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When `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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char *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 `getopt'.
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On entry to `getopt', zero means this is the first call; initialize.
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When `getopt' returns EOF, 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, `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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int optind;
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/* Callers store zero here to inhibit the error message
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for unrecognized options. */
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int opterr;
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int nargc;
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char **nargv;
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const char *noptstring;
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GetOpt (int argc, char **argv, const char *optstring);
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int operator () (void);
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};
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#endif
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