1 ------------------------------------------------------------------------------
3 -- GNAT ncurses Binding Samples --
9 ------------------------------------------------------------------------------
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35 ------------------------------------------------------------------------------
36 -- Author: Eugene V. Melaragno <aldomel@ix.netcom.com> 2000
39 -- $Date: 2011/03/19 12:09:51 $
40 -- Binding Version 01.00
41 ------------------------------------------------------------------------------
42 -- A simplified version of the GNU getopt function
43 -- copyright Free Software Foundtion
45 with Ada.Strings.Fixed;
46 with Ada.Strings.Bounded;
47 with Ada.Text_IO; use Ada.Text_IO;
49 package body ncurses2.getopt is
51 nextchar : Natural := 0;
53 -- Ncurses doesn't use the non option elements so we are spared
54 -- the job of computing those.
56 -- also the user is not allowed to modify argv or argc
57 -- Doing so is Erroneous execution.
59 -- long options are not handled.
61 procedure Qgetopt (retval : out Integer;
64 -- argv will be the Argument function.
66 optind : in out Integer;
67 -- ignored for ncurses, must be initialized to 1 by
70 -- a garbage collector would be useful here.
73 package BS is new Ada.Strings.Bounded.Generic_Bounded_Length (200);
75 optargx : Bounded_String;
83 optargx := To_Bounded_String ("");
87 if argv (optind) = "--" then
88 -- the rest are non-options, we ignore them
93 if argv (optind)(1) /= '-' or argv (optind)'Length = 1 then
95 Optarg := new String'(argv (optind));
100 nextchar := 2; -- skip the one hyphen.
103 -- Look at and handle the next short option-character.
105 c : Character := argv (optind) (nextchar);
106 temp : constant Natural :=
107 Ada.Strings.Fixed.Index (optstring, String'(1 => c));
109 if temp = 0 or c = ':' then
110 Put_Line (Standard_Error,
111 argv (optind) & ": invalid option -- " & c);
116 if optstring (temp + 1) = ':' then
117 if optstring (temp + 2) = ':' then
118 -- This is an option that accepts an argument optionally.
119 if nextchar /= argv (optind)'Length then
120 optargx := To_Bounded_String
121 (argv (optind) (nextchar .. argv (optind)'Length));
126 -- This is an option that requires an argument.
127 if nextchar /= argv (optind)'Length then
128 optargx := To_Bounded_String
129 (argv (optind) (nextchar .. argv (optind)'Length));
130 optind := optind + 1;
131 elsif optind = argc then
132 Put_Line (Standard_Error,
134 ": option requires an argument -- " & c);
135 if optstring (optstring'First) = ':' then
141 -- increment it again when taking next ARGV-elt as argument.
142 optind := optind + 1;
143 optargx := To_Bounded_String (argv (optind));
144 optind := optind + 1;
148 else -- no argument for the option
149 if nextchar = argv (optind)'Length then
150 optind := optind + 1;
153 nextchar := nextchar + 1;
157 retval := Character'Pos (c);
158 Optarg := new String'(To_String (optargx));