| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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; |
