1 ------------------------------------------------------------------------------
3 -- GNAT ncurses Binding Samples --
9 ------------------------------------------------------------------------------
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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 optopt : Character := '?';
52 nextchar : Natural := 0;
54 -- Ncurses doesn't use the non option elements so we are spared
55 -- the job of computing those.
57 -- also the user is not allowed to modify argv or argc
58 -- Doing so is Erroneous execution.
60 -- longoptions are not handled.
62 procedure Qgetopt (retval : out Integer;
65 -- argv will be the Argument function.
67 optind : in out Integer;
68 -- ignored for ncurses, must be initialized to 1 by
71 -- a garbage colector would be useful here.
74 package BS is new Ada.Strings.Bounded.Generic_Bounded_Length (200);
76 optargx : Bounded_String;
84 optargx := To_Bounded_String ("");
88 if argv (optind) = "--" then
89 -- the rest are non-options, we ignore them
94 if argv (optind)(1) /= '-' or argv (optind)'Length = 1 then
96 Optarg := new String'(argv (optind));
101 nextchar := 2; -- skip the one hyphen.
104 -- Look at and handle the next short option-character.
106 c : Character := argv (optind) (nextchar);
108 Ada.Strings.Fixed.Index (optstring, String'(1 => c));
110 if temp = 0 or c = ':' then
111 Put_Line (Standard_Error,
112 argv (optind) & ": invalid option -- " & c);
118 if optstring (temp + 1) = ':' then
119 if optstring (temp + 2) = ':' then
120 -- This is an option that accepts an argument optionally.
121 if nextchar /= argv (optind)'Length then
122 optargx := To_Bounded_String
123 (argv (optind) (nextchar .. argv (optind)'Length));
128 -- This is an option that requires an argument.
129 if nextchar /= argv (optind)'Length then
130 optargx := To_Bounded_String
131 (argv (optind) (nextchar .. argv (optind)'Length));
132 optind := optind + 1;
133 elsif optind = argc then
134 Put_Line (Standard_Error,
136 ": option requires an argument -- " & c);
138 if optstring (1) = ':' then
144 -- increment it again when taking next ARGV-elt as argument.
145 optind := optind + 1;
146 optargx := To_Bounded_String (argv (optind));
147 optind := optind + 1;
151 else -- no argument for the option
152 if nextchar = argv (optind)'Length then
153 optind := optind + 1;
156 nextchar := nextchar + 1;
160 retval := Character'Pos (c);
161 Optarg := new String'(To_String (optargx));