/usr/share/ada/adainclude/gtkada/gtkada-bindings.adb is in libgtkada16.1.0-dev 17.0.2017-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- GtkAda - Ada95 binding for the Gimp Toolkit --
-- --
-- Copyright (C) 2006-2017, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 3, or (at your option) any later --
-- version. This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- --
-- --
-- --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
------------------------------------------------------------------------------
with Ada.Unchecked_Conversion;
with Glib; use Glib;
with Glib.Object; use Glib.Object;
with GNAT.IO;
with GNAT.Strings; use GNAT.Strings;
with Interfaces.C; use Interfaces.C;
with Interfaces.C.Strings; use Interfaces.C.Strings;
package body Gtkada.Bindings is
procedure Default_Exception_Handler
(Occurrence : Ada.Exceptions.Exception_Occurrence);
On_Exception : Exception_Handler := Default_Exception_Handler'Access;
--------------------
-- String_Or_Null --
--------------------
function String_Or_Null
(S : String) return Interfaces.C.Strings.chars_ptr is
begin
if S = "" then
return Null_Ptr;
else
return New_String (S);
end if;
end String_Or_Null;
--------------------
-- To_String_List --
--------------------
function To_String_List
(C : Interfaces.C.Strings.chars_ptr_array) return String_List
is
Count : Natural := 0;
begin
while C (size_t (Count)) /= Null_Ptr loop
Count := Count + 1;
end loop;
return To_String_List (C, Gint (Count));
end To_String_List;
-----------------------------
-- To_String_List_And_Free --
-----------------------------
function To_String_List_And_Free
(C : chars_ptr_array_access) return String_List
is
Result : constant String_List := To_String_List (C.all);
begin
g_strfreev (C);
return Result;
end To_String_List_And_Free;
--------------------
-- To_String_List --
--------------------
function To_String_List
(C : ICS.chars_ptr_array; N : Gint) return GNAT.Strings.String_List
is
Result : String_List (1 .. Natural (N));
begin
for R in Result'Range loop
Result (R) := new String'(Value (C (size_t (R) - 1)));
end loop;
return Result;
end To_String_List;
----------------------
-- From_String_List --
----------------------
function From_String_List
(C : String_List) return Interfaces.C.Strings.chars_ptr_array
is
Result : Interfaces.C.Strings.chars_ptr_array (0 .. C'Length);
begin
for S in C'Range loop
Result (size_t (S - C'First)) := New_String (C (S).all);
end loop;
Result (Result'Last) := Null_Ptr;
return Result;
end From_String_List;
------------------
-- To_Chars_Ptr --
------------------
function To_Chars_Ptr
(C : chars_ptr_array_access) return ICS.chars_ptr_array
is
Count : size_t := 0;
begin
while C (Count) /= Null_Ptr loop
Count := Count + 1;
end loop;
declare
Result : chars_ptr_array (0 .. Count - 1);
begin
for J in Result'Range loop
Result (J) := C (J);
end loop;
return Result;
end;
end To_Chars_Ptr;
--------------------------------
-- Generic_To_Address_Or_Null --
--------------------------------
function Generic_To_Address_Or_Null
(Val : System.Address) return System.Address
is
type T_Access is access all T;
function Convert is new Ada.Unchecked_Conversion
(System.Address, T_Access);
begin
if Convert (Val).all = Null_T then
return System.Null_Address;
else
return Val;
end if;
end Generic_To_Address_Or_Null;
-----------------------------------
-- To_Gint_Array_Zero_Terminated --
-----------------------------------
function To_Gint_Array_Zero_Terminated
(Arr : Gint_Arrays.Unbounded_Array_Access) return Glib.Gint_Array
is
Count : Natural := Arr'First;
begin
while Arr (Count) /= 0 loop
Count := Count + 1;
end loop;
declare
Result : Gint_Array (1 .. Count);
begin
for R in Result'Range loop
Result (R) := Arr (R - Result'First + Arr'First);
end loop;
return Result;
end;
end To_Gint_Array_Zero_Terminated;
--------------------
-- Value_And_Free --
--------------------
function Value_And_Free
(Str : Interfaces.C.Strings.chars_ptr) return String
is
begin
if Str = Null_Ptr then
return "";
end if;
declare
procedure C_Free (S : chars_ptr);
pragma Import (C, C_Free, "free");
Val : constant String := Value (Str);
begin
-- Since Str was allocated by gtk+ via malloc(), and not via
-- System.Memory, we should not be using Interfaces.C.Strings.Free
-- which goes through System.Memory. So we call free() directly
-- instead.
C_Free (Str);
return Val;
end;
end Value_And_Free;
-------------------------
-- Value_Allowing_Null --
-------------------------
function Value_Allowing_Null
(Str : Interfaces.C.Strings.chars_ptr) return String
is
begin
if Str = Null_Ptr then
return "";
end if;
return Interfaces.C.Strings.Value (Str);
end Value_Allowing_Null;
function Value_Allowing_Null
(Str : Interfaces.C.Strings.chars_ptr) return Glib.Signal_Name
is
begin
if Str = Null_Ptr then
return "";
end if;
return Glib.Signal_Name (String'(Interfaces.C.Strings.Value (Str)));
end Value_Allowing_Null;
---------------------------------
-- Unchecked_Do_Signal_Connect --
---------------------------------
procedure Unchecked_Do_Signal_Connect
(Object : not null access Glib.Object.GObject_Record'Class;
C_Name : Glib.Signal_Name;
Marshaller : C_Marshaller;
Handler : System.Address;
Destroy : System.Address := System.Null_Address;
After : Boolean := False;
Slot_Object : access Glib.Object.GObject_Record'Class := null)
is
function Internal
(Instance : System.Address;
Detailed_Signal : Glib.Signal_Name;
Closure : GClosure;
After : Gint := 0) return Gulong;
pragma Import (C, Internal, "g_signal_connect_closure");
use type System.Address;
Id : Gulong;
Closure : GClosure;
pragma Unreferenced (Id);
begin
if Slot_Object /= null then
Closure := CClosure_New (Handler, Get_Object (Slot_Object), Destroy);
Watch_Closure (Get_Object (Slot_Object), Closure);
else
Closure := CClosure_New (Handler, System.Null_Address, Destroy);
end if;
-- Could also use Set_Meta_Marshal to pass user data to the marshaller
Set_Marshal (Closure, Marshaller);
Id := Internal
(Get_Object (Object),
C_Name,
Closure => Closure,
After => Boolean'Pos (After));
end Unchecked_Do_Signal_Connect;
---------------------------------
-- Unchecked_Do_Signal_Connect --
---------------------------------
procedure Unchecked_Do_Signal_Connect
(Object : Glib.Types.GType_Interface;
C_Name : Glib.Signal_Name;
Marshaller : C_Marshaller;
Handler : System.Address;
Destroy : System.Address := System.Null_Address;
After : Boolean := False;
Slot_Object : access Glib.Object.GObject_Record'Class := null)
is
function Internal
(Instance : Glib.Types.GType_Interface;
Detailed_Signal : Glib.Signal_Name;
Closure : GClosure;
After : Gint := 0) return Gulong;
pragma Import (C, Internal, "g_signal_connect_closure");
use type System.Address;
Id : Gulong;
Closure : GClosure;
pragma Unreferenced (Id);
begin
if Slot_Object /= null then
Closure := CClosure_New (Handler, Get_Object (Slot_Object), Destroy);
Watch_Closure (Get_Object (Slot_Object), Closure);
else
Closure := CClosure_New (Handler, System.Null_Address, Destroy);
end if;
-- Could also use Set_Meta_Marshal to pass user data to the marshaller
Set_Marshal (Closure, Marshaller);
Id := Internal
(Object,
C_Name,
Closure => Closure,
After => Boolean'Pos (After));
end Unchecked_Do_Signal_Connect;
-----------------------
-- Process_Exception --
-----------------------
procedure Process_Exception (E : Ada.Exceptions.Exception_Occurrence) is
begin
On_Exception (E);
exception
when E : others =>
-- never propagate the exception to C
Default_Exception_Handler (E);
end Process_Exception;
-------------------------------
-- Default_Exception_Handler --
-------------------------------
procedure Default_Exception_Handler
(Occurrence : Ada.Exceptions.Exception_Occurrence)
is
begin
GNAT.IO.Put_Line
(GNAT.IO.Standard_Error,
Ada.Exceptions.Exception_Information (Occurrence));
end Default_Exception_Handler;
----------------------
-- Set_On_Exception --
----------------------
procedure Set_On_Exception (Handler : Exception_Handler) is
begin
On_Exception := Handler;
end Set_On_Exception;
end Gtkada.Bindings;
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