--- /dev/null
+------------------------------------------------------------------------------
+-- --
+-- 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;
projects / ncurses.git / blobdiff