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- ------------------------------------------------------------------------------
- -- --
- -- GNAT ncurses Binding Samples --
- -- --
- -- ncurses --
- -- --
- -- B O D Y --
- -- --
- ------------------------------------------------------------------------------
- -- Copyright (c) 2000 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: 1.2 $
- -- 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
-
- opterr : Character := Character'Val (1);
- optopt : Character := '?';
- initialized : Boolean := False;
-
- 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 : 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);
- optopt := 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);
- optopt := c;
- if optstring (1) = ':' 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;
-