Gitiles
Code Review Sign In
gerrit.omnirom.org / android_external_libncurses / refs/heads/android-16 / . / Ada95 / src / terminal_interface-curses-terminfo.adb
blob: c15fa3d0704d775c7f8fbffa647839f273235e1f [file] [log] [blame]
Amit Daniel Kachhape6a01f52011-07-20 11:45:59 +0530[diff] [blame]1------------------------------------------------------------------------------
2-- --
3-- GNAT ncurses Binding --
4-- --
5-- Terminal_Interface.Curses.Terminfo --
6-- --
7-- B O D Y --
8-- --
9------------------------------------------------------------------------------
micky3879b9f5e72025-07-08 18:04:53 -0400[diff] [blame]10-- Copyright 2020 Thomas E. Dickey --
11-- Copyright 2000-2006,2009 Free Software Foundation, Inc. --
Amit Daniel Kachhape6a01f52011-07-20 11:45:59 +0530[diff] [blame]12-- --
13-- Permission is hereby granted, free of charge, to any person obtaining a --
14-- copy of this software and associated documentation files (the --
15-- "Software"), to deal in the Software without restriction, including --
16-- without limitation the rights to use, copy, modify, merge, publish, --
17-- distribute, distribute with modifications, sublicense, and/or sell --
18-- copies of the Software, and to permit persons to whom the Software is --
19-- furnished to do so, subject to the following conditions: --
20-- --
21-- The above copyright notice and this permission notice shall be included --
22-- in all copies or substantial portions of the Software. --
23-- --
24-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS --
25-- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF --
26-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. --
27-- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, --
28-- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR --
29-- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR --
30-- THE USE OR OTHER DEALINGS IN THE SOFTWARE. --
31-- --
32-- Except as contained in this notice, the name(s) of the above copyright --
33-- holders shall not be used in advertising or otherwise to promote the --
34-- sale, use or other dealings in this Software without prior written --
35-- authorization. --
36------------------------------------------------------------------------------
37-- Author: Juergen Pfeifer, 1996
38-- Version Control:
micky3879b9f5e72025-07-08 18:04:53 -0400[diff] [blame]39-- $Revision: 1.7 $
40-- $Date: 2020/02/02 23:34:34 $
Amit Daniel Kachhape6a01f52011-07-20 11:45:59 +0530[diff] [blame]41-- Binding Version 01.00
42------------------------------------------------------------------------------
43
44with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;
45with Interfaces.C; use Interfaces.C;
46with Interfaces.C.Strings; use Interfaces.C.Strings;
47with Ada.Unchecked_Conversion;
48
49package body Terminal_Interface.Curses.Terminfo is
50
Steve Kondikae271bc2015-11-15 02:50:53 +0100[diff] [blame]51 function Is_MinusOne_Pointer (P : chars_ptr) return Boolean;
Amit Daniel Kachhape6a01f52011-07-20 11:45:59 +0530[diff] [blame]52
Steve Kondikae271bc2015-11-15 02:50:53 +0100[diff] [blame]53 function Is_MinusOne_Pointer (P : chars_ptr) return Boolean is
Amit Daniel Kachhape6a01f52011-07-20 11:45:59 +0530[diff] [blame]54 type Weird_Address is new System.Storage_Elements.Integer_Address;
55 Invalid_Pointer : constant Weird_Address := -1;
56 function To_Weird is new Ada.Unchecked_Conversion
57 (Source => chars_ptr, Target => Weird_Address);
58 begin
59 if To_Weird (P) = Invalid_Pointer then
60 return True;
61 else
62 return False;
63 end if;
64 end Is_MinusOne_Pointer;
65 pragma Inline (Is_MinusOne_Pointer);
66
67------------------------------------------------------------------------------
68 function Get_Flag (Name : String) return Boolean
69 is
70 function tigetflag (id : char_array) return Curses_Bool;
71 pragma Import (C, tigetflag);
72 Txt : char_array (0 .. Name'Length);
73 Length : size_t;
74 begin
75 To_C (Name, Txt, Length);
76 if tigetflag (Txt) = Curses_Bool (Curses_True) then
77 return True;
78 else
79 return False;
80 end if;
81 end Get_Flag;
82
83------------------------------------------------------------------------------
84 procedure Get_String (Name : String;
85 Value : out Terminfo_String;
86 Result : out Boolean)
87 is
88 function tigetstr (id : char_array) return chars_ptr;
89 pragma Import (C, tigetstr, "tigetstr");
90 Txt : char_array (0 .. Name'Length);
91 Length : size_t;
92 Txt2 : chars_ptr;
93 begin
94 To_C (Name, Txt, Length);
95 Txt2 := tigetstr (Txt);
96 if Txt2 = Null_Ptr then
97 Result := False;
98 elsif Is_MinusOne_Pointer (Txt2) then
99 raise Curses_Exception;
100 else
101 Value := Terminfo_String (Fill_String (Txt2));
102 Result := True;
103 end if;
104 end Get_String;
105
106------------------------------------------------------------------------------
107 function Has_String (Name : String) return Boolean
108 is
109 function tigetstr (id : char_array) return chars_ptr;
110 pragma Import (C, tigetstr, "tigetstr");
111 Txt : char_array (0 .. Name'Length);
112 Length : size_t;
113 Txt2 : chars_ptr;
114 begin
115 To_C (Name, Txt, Length);
116 Txt2 := tigetstr (Txt);
117 if Txt2 = Null_Ptr then
118 return False;
119 elsif Is_MinusOne_Pointer (Txt2) then
120 raise Curses_Exception;
121 else
122 return True;
123 end if;
124 end Has_String;
125
126------------------------------------------------------------------------------
127 function Get_Number (Name : String) return Integer is
128 function tigetstr (s : char_array) return C_Int;
129 pragma Import (C, tigetstr);
130 Txt : char_array (0 .. Name'Length);
131 Length : size_t;
132 begin
133 To_C (Name, Txt, Length);
134 return Integer (tigetstr (Txt));
135 end Get_Number;
136
137------------------------------------------------------------------------------
138 procedure Put_String (Str : Terminfo_String;
139 affcnt : Natural := 1;
140 putc : putctype := null) is
141 function tputs (str : char_array;
142 affcnt : C_Int;
143 putc : putctype) return C_Int;
144 function putp (str : char_array) return C_Int;
145 pragma Import (C, tputs);
146 pragma Import (C, putp);
147 Txt : char_array (0 .. Str'Length);
148 Length : size_t;
149 Err : C_Int;
150 begin
151 To_C (String (Str), Txt, Length);
152 if putc = null then
153 Err := putp (Txt);
154 else
155 Err := tputs (Txt, C_Int (affcnt), putc);
156 end if;
157 if Err = Curses_Err then
158 raise Curses_Exception;
159 end if;
160 end Put_String;
161
162end Terminal_Interface.Curses.Terminfo;