------------------------------------------------------------------------------ -- -- -- GNAT ncurses Binding Samples -- -- -- -- ncurses -- -- -- -- B O D Y -- -- -- ------------------------------------------------------------------------------ -- Copyright (c) 2000-2004,2008 Free Software Foundation, Inc. -- -- -- -- Permission is hereby granted, free of charge, to any person obtaining a -- -- copy of this software and associated documentation files (the -- -- "Software"), to deal in the Software without restriction, including -- -- without limitation the rights to use, copy, modify, merge, publish, -- -- distribute, distribute with modifications, sublicense, and/or sell -- -- copies of the Software, and to permit persons to whom the Software is -- -- furnished to do so, subject to the following conditions: -- -- -- -- The above copyright notice and this permission notice shall be included -- -- in all copies or substantial portions of the Software. -- -- -- -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -- -- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -- -- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. -- -- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -- -- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -- -- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR -- -- THE USE OR OTHER DEALINGS IN THE SOFTWARE. -- -- -- -- Except as contained in this notice, the name(s) of the above copyright -- -- holders shall not be used in advertising or otherwise to promote the -- -- sale, use or other dealings in this Software without prior written -- -- authorization. -- ------------------------------------------------------------------------------ -- Author: Eugene V. Melaragno <aldomel@ix.netcom.com> 2000 -- Version Control -- $Revision: 1.7 $ -- $Date: 2008/07/26 18:46:44 $ -- Binding Version 01.00 ------------------------------------------------------------------------------ -- A simplified version of the GNU getopt function -- copyright Free Software Foundtion with Ada.Strings.Fixed; with Ada.Strings.Bounded; with Ada.Text_IO; use Ada.Text_IO; package body ncurses2.getopt is nextchar : Natural := 0; -- Ncurses doesn't use the non option elements so we are spared -- the job of computing those. -- also the user is not allowed to modify argv or argc -- Doing so is Erroneous execution. -- longoptions are not handled. procedure Qgetopt (retval : out Integer; argc : Integer; argv : stringfunc; -- argv will be the Argument function. optstring : String; optind : in out Integer; -- ignored for ncurses, must be initialized to 1 by -- the caller Optarg : out stringa -- a garbage colector would be useful here. ) is package BS is new Ada.Strings.Bounded.Generic_Bounded_Length (200); use BS; optargx : Bounded_String; begin if argc < optind then retval := -1; return; end if; optargx := To_Bounded_String (""); if nextchar = 0 then if argv (optind) = "--" then -- the rest are non-options, we ignore them retval := -1; return; end if; if argv (optind)(1) /= '-' or argv (optind)'Length = 1 then optind := optind + 1; Optarg := new String'(argv (optind)); retval := 1; return; end if; nextchar := 2; -- skip the one hyphen. end if; -- Look at and handle the next short option-character. declare c : Character := argv (optind) (nextchar); temp : constant Natural := Ada.Strings.Fixed.Index (optstring, String'(1 => c)); begin if temp = 0 or c = ':' then Put_Line (Standard_Error, argv (optind) & ": invalid option -- " & c); c := '?'; return; end if; if optstring (temp + 1) = ':' then if optstring (temp + 2) = ':' then -- This is an option that accepts an argument optionally. if nextchar /= argv (optind)'Length then optargx := To_Bounded_String (argv (optind) (nextchar .. argv (optind)'Length)); else Optarg := null; end if; else -- This is an option that requires an argument. if nextchar /= argv (optind)'Length then optargx := To_Bounded_String (argv (optind) (nextchar .. argv (optind)'Length)); optind := optind + 1; elsif optind = argc then Put_Line (Standard_Error, argv (optind) & ": option requires an argument -- " & c); if optstring (optstring'First) = ':' then c := ':'; else c := '?'; end if; else -- increment it again when taking next ARGV-elt as argument. optind := optind + 1; optargx := To_Bounded_String (argv (optind)); optind := optind + 1; end if; end if; nextchar := 0; else -- no argument for the option if nextchar = argv (optind)'Length then optind := optind + 1; nextchar := 0; else nextchar := nextchar + 1; end if; end if; retval := Character'Pos (c); Optarg := new String'(To_String (optargx)); return; end; end Qgetopt; end ncurses2.getopt;