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164 lines
6.8 KiB
Ada
164 lines
6.8 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT ncurses Binding Samples --
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-- --
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-- ncurses --
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-- --
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-- B O D Y --
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-- --
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------------------------------------------------------------------------------
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-- Copyright (c) 2000,2004 Free Software Foundation, Inc. --
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-- --
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-- Permission is hereby granted, free of charge, to any person obtaining a --
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-- copy of this software and associated documentation files (the --
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-- "Software"), to deal in the Software without restriction, including --
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-- without limitation the rights to use, copy, modify, merge, publish, --
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-- distribute, distribute with modifications, sublicense, and/or sell --
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-- copies of the Software, and to permit persons to whom the Software is --
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-- furnished to do so, subject to the following conditions: --
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-- --
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-- The above copyright notice and this permission notice shall be included --
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-- in all copies or substantial portions of the Software. --
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-- --
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-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS --
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-- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF --
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-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. --
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-- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, --
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-- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR --
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-- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR --
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-- THE USE OR OTHER DEALINGS IN THE SOFTWARE. --
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-- --
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-- Except as contained in this notice, the name(s) of the above copyright --
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-- holders shall not be used in advertising or otherwise to promote the --
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-- sale, use or other dealings in this Software without prior written --
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-- authorization. --
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------------------------------------------------------------------------------
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-- Author: Eugene V. Melaragno <aldomel@ix.netcom.com> 2000
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-- Version Control
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-- $Revision: 1.6 $
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-- $Date: 2004/08/21 21:37:00 $
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-- Binding Version 01.00
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------------------------------------------------------------------------------
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-- A simplified version of the GNU getopt function
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-- copyright Free Software Foundtion
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with Ada.Strings.Fixed;
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with Ada.Strings.Bounded;
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with Ada.Text_IO; use Ada.Text_IO;
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package body ncurses2.getopt is
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nextchar : Natural := 0;
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-- Ncurses doesn't use the non option elements so we are spared
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-- the job of computing those.
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-- also the user is not allowed to modify argv or argc
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-- Doing so is Erroneous execution.
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-- longoptions are not handled.
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procedure Qgetopt (retval : out Integer;
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argc : Integer;
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argv : stringfunc;
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-- argv will be the Argument function.
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optstring : String;
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optind : in out Integer;
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-- ignored for ncurses, must be initialized to 1 by
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-- the caller
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Optarg : out stringa
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-- a garbage colector would be useful here.
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) is
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package BS is new Ada.Strings.Bounded.Generic_Bounded_Length (200);
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use BS;
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optargx : Bounded_String;
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begin
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if argc < optind then
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retval := -1;
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return;
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end if;
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optargx := To_Bounded_String ("");
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if nextchar = 0 then
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if argv (optind) = "--" then
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-- the rest are non-options, we ignore them
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retval := -1;
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return;
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end if;
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if argv (optind)(1) /= '-' or argv (optind)'Length = 1 then
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optind := optind + 1;
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Optarg := new String'(argv (optind));
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retval := 1;
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return;
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end if;
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nextchar := 2; -- skip the one hyphen.
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end if;
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-- Look at and handle the next short option-character.
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declare
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c : Character := argv (optind) (nextchar);
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temp : constant Natural :=
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Ada.Strings.Fixed.Index (optstring, String'(1 => c));
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begin
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if temp = 0 or c = ':' then
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Put_Line (Standard_Error,
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argv (optind) & ": invalid option -- " & c);
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c := '?';
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return;
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end if;
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if optstring (temp + 1) = ':' then
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if optstring (temp + 2) = ':' then
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-- This is an option that accepts an argument optionally.
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if nextchar /= argv (optind)'Length then
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optargx := To_Bounded_String
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(argv (optind) (nextchar .. argv (optind)'Length));
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else
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Optarg := null;
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end if;
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else
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-- This is an option that requires an argument.
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if nextchar /= argv (optind)'Length then
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optargx := To_Bounded_String
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(argv (optind) (nextchar .. argv (optind)'Length));
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optind := optind + 1;
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elsif optind = argc then
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Put_Line (Standard_Error,
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argv (optind) &
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": option requires an argument -- " & c);
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if optstring (1) = ':' then
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c := ':';
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else
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c := '?';
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end if;
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else
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-- increment it again when taking next ARGV-elt as argument.
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optind := optind + 1;
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optargx := To_Bounded_String (argv (optind));
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optind := optind + 1;
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end if;
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end if;
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nextchar := 0;
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else -- no argument for the option
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if nextchar = argv (optind)'Length then
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optind := optind + 1;
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nextchar := 0;
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else
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nextchar := nextchar + 1;
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end if;
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end if;
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retval := Character'Pos (c);
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Optarg := new String'(To_String (optargx));
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return;
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end;
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end Qgetopt;
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end ncurses2.getopt;
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