| Amit Daniel Kachhap | e6a01f5 | 2011-07-20 11:45:59 +0530 | [diff] [blame] | 1 | ------------------------------------------------------------------------------ |
| 2 | -- -- |
| 3 | -- GNAT ncurses Binding Samples -- |
| 4 | -- -- |
| 5 | -- ncurses -- |
| 6 | -- -- |
| 7 | -- B O D Y -- |
| 8 | -- -- |
| 9 | ------------------------------------------------------------------------------ |
| 10 | -- Copyright (c) 2000-2004,2008 Free Software Foundation, Inc. -- |
| 11 | -- -- |
| 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: -- |
| 19 | -- -- |
| 20 | -- The above copyright notice and this permission notice shall be included -- |
| 21 | -- in all copies or substantial portions of the Software. -- |
| 22 | -- -- |
| 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. -- |
| 30 | -- -- |
| 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 -- |
| 34 | -- authorization. -- |
| 35 | ------------------------------------------------------------------------------ |
| 36 | -- Author: Eugene V. Melaragno <aldomel@ix.netcom.com> 2000 |
| 37 | -- Version Control |
| 38 | -- $Revision: 1.7 $ |
| 39 | -- $Date: 2008/07/26 18:46:44 $ |
| 40 | -- Binding Version 01.00 |
| 41 | ------------------------------------------------------------------------------ |
| 42 | -- A simplified version of the GNU getopt function |
| 43 | -- copyright Free Software Foundtion |
| 44 | |
| 45 | with Ada.Strings.Fixed; |
| 46 | with Ada.Strings.Bounded; |
| 47 | with Ada.Text_IO; use Ada.Text_IO; |
| 48 | |
| 49 | package body ncurses2.getopt is |
| 50 | |
| 51 | nextchar : Natural := 0; |
| 52 | |
| 53 | -- Ncurses doesn't use the non option elements so we are spared |
| 54 | -- the job of computing those. |
| 55 | |
| 56 | -- also the user is not allowed to modify argv or argc |
| 57 | -- Doing so is Erroneous execution. |
| 58 | |
| 59 | -- longoptions are not handled. |
| 60 | |
| 61 | procedure Qgetopt (retval : out Integer; |
| 62 | argc : Integer; |
| 63 | argv : stringfunc; |
| 64 | -- argv will be the Argument function. |
| 65 | optstring : String; |
| 66 | optind : in out Integer; |
| 67 | -- ignored for ncurses, must be initialized to 1 by |
| 68 | -- the caller |
| 69 | Optarg : out stringa |
| 70 | -- a garbage colector would be useful here. |
| 71 | ) is |
| 72 | |
| 73 | package BS is new Ada.Strings.Bounded.Generic_Bounded_Length (200); |
| 74 | use BS; |
| 75 | optargx : Bounded_String; |
| 76 | begin |
| 77 | |
| 78 | if argc < optind then |
| 79 | retval := -1; |
| 80 | return; |
| 81 | end if; |
| 82 | |
| 83 | optargx := To_Bounded_String (""); |
| 84 | |
| 85 | if nextchar = 0 then |
| 86 | |
| 87 | if argv (optind) = "--" then |
| 88 | -- the rest are non-options, we ignore them |
| 89 | retval := -1; |
| 90 | return; |
| 91 | end if; |
| 92 | |
| 93 | if argv (optind)(1) /= '-' or argv (optind)'Length = 1 then |
| 94 | optind := optind + 1; |
| 95 | Optarg := new String'(argv (optind)); |
| 96 | retval := 1; |
| 97 | return; |
| 98 | end if; |
| 99 | |
| 100 | nextchar := 2; -- skip the one hyphen. |
| 101 | end if; |
| 102 | |
| 103 | -- Look at and handle the next short option-character. |
| 104 | declare |
| 105 | c : Character := argv (optind) (nextchar); |
| 106 | temp : constant Natural := |
| 107 | Ada.Strings.Fixed.Index (optstring, String'(1 => c)); |
| 108 | begin |
| 109 | if temp = 0 or c = ':' then |
| 110 | Put_Line (Standard_Error, |
| 111 | argv (optind) & ": invalid option -- " & c); |
| 112 | c := '?'; |
| 113 | return; |
| 114 | end if; |
| 115 | |
| 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)); |
| 122 | else |
| 123 | Optarg := null; |
| 124 | end if; |
| 125 | else |
| 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, |
| 133 | argv (optind) & |
| 134 | ": option requires an argument -- " & c); |
| 135 | if optstring (optstring'First) = ':' then |
| 136 | c := ':'; |
| 137 | else |
| 138 | c := '?'; |
| 139 | end if; |
| 140 | else |
| 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; |
| 145 | end if; |
| 146 | end if; |
| 147 | nextchar := 0; |
| 148 | else -- no argument for the option |
| 149 | if nextchar = argv (optind)'Length then |
| 150 | optind := optind + 1; |
| 151 | nextchar := 0; |
| 152 | else |
| 153 | nextchar := nextchar + 1; |
| 154 | end if; |
| 155 | end if; |
| 156 | |
| 157 | retval := Character'Pos (c); |
| 158 | Optarg := new String'(To_String (optargx)); |
| 159 | return; |
| 160 | end; |
| 161 | end Qgetopt; |
| 162 | |
| 163 | end ncurses2.getopt; |