1 ------------------------------------------------------------------------------
3 -- GNAT ncurses Binding Samples --
9 ------------------------------------------------------------------------------
10 -- Copyright (c) 2000 Free Software Foundation, Inc. --
12 -- Permission is hereby granted, free of charge, to any person obtaining a --
13 -- copy of this software and associated documentation files (the --
14 -- "Software"), to deal in the Software without restriction, including --
15 -- without limitation the rights to use, copy, modify, merge, publish, --
16 -- distribute, distribute with modifications, sublicense, and/or sell --
17 -- copies of the Software, and to permit persons to whom the Software is --
18 -- furnished to do so, subject to the following conditions: --
20 -- The above copyright notice and this permission notice shall be included --
21 -- in all copies or substantial portions of the Software. --
23 -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS --
24 -- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF --
25 -- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. --
26 -- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, --
27 -- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR --
28 -- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR --
29 -- THE USE OR OTHER DEALINGS IN THE SOFTWARE. --
31 -- Except as contained in this notice, the name(s) of the above copyright --
32 -- holders shall not be used in advertising or otherwise to promote the --
33 -- sale, use or other dealings in this Software without prior written --
35 ------------------------------------------------------------------------------
36 -- Author: Eugene V. Melaragno <aldomel@ix.netcom.com> 2000
39 -- Binding Version 01.00
40 ------------------------------------------------------------------------------
41 -- A simplified version of the GNU getopt function
42 -- copyright Free Software Foundtion
44 with Ada.Strings.Fixed;
45 with Ada.Strings.Bounded;
46 with Ada.Text_IO; use Ada.Text_IO;
48 package body ncurses2.getopt is
50 opterr : Character := Character'Val (1);
51 optopt : Character := '?';
52 initialized : Boolean := False;
54 nextchar : Natural := 0;
56 -- Ncurses doesn't use the non option elements so we are spared
57 -- the job of computing those.
59 -- also the user is not allowed to modify argv or argc
60 -- Doing so is Erroneous execution.
62 -- longoptions are not handled.
64 procedure Qgetopt (retval : out Integer;
67 -- argv will be the Argument function.
69 optind : in out Integer;
70 -- ignored for ncurses, must be initialized to 1 by
73 -- a garbage colector would be useful here.
76 package BS is new Ada.Strings.Bounded.Generic_Bounded_Length (200);
78 optargx : Bounded_String;
86 optargx := To_Bounded_String ("");
90 if argv (optind) = "--" then
91 -- the rest are non-options, we ignore them
96 if argv (optind)(1) /= '-' or argv (optind)'Length = 1 then
98 Optarg := new String'(argv (optind));
103 nextchar := 2; -- skip the one hyphen.
106 -- Look at and handle the next short option-character.
108 c : Character := argv (optind) (nextchar);
110 Ada.Strings.Fixed.Index (optstring, String'(1 => c));
112 if temp = 0 or c = ':' then
113 Put_Line (Standard_Error,
114 argv (optind) & ": invalid option -- " & c);
120 if optstring (temp + 1) = ':' then
121 if optstring (temp + 2) = ':' then
122 -- This is an option that accepts an argument optionally.
123 if nextchar /= argv (optind)'Length then
124 optargx := To_Bounded_String
125 (argv (optind) (nextchar .. argv (optind)'Length));
130 -- This is an option that requires an argument.
131 if nextchar /= argv (optind)'Length then
132 optargx := To_Bounded_String
133 (argv (optind) (nextchar .. argv (optind)'Length));
134 optind := optind + 1;
135 elsif optind = argc then
136 Put_Line (Standard_Error,
138 ": option requires an argument -- " & c);
140 if optstring (1) = ':' then
146 -- increment it again when taking next ARGV-elt as argument.
147 optind := optind + 1;
148 optargx := To_Bounded_String (argv (optind));
149 optind := optind + 1;
153 else -- no argument for the option
154 if nextchar = argv (optind)'Length then
155 optind := optind + 1;
158 nextchar := nextchar + 1;
162 retval := Character'Pos (c);
163 Optarg := new String'(To_String (optargx));