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535 | with Ada.Directories;
with Ada.Streams.Stream_IO;
with Ada.Unchecked_Deallocation;
package body WL.Binary_IO is
procedure Free is
new Ada.Unchecked_Deallocation
(Ada.Streams.Stream_Element_Array,
Stream_Array_Access);
procedure Flush
(File : File_Type);
-----------
-- Close --
-----------
procedure Close (File : in out File_Type) is
begin
if File.Mode = Out_File then
Flush (File);
end if;
if File.Data /= null then
Free (File.Data);
File.Data := null;
end if;
end Close;
----------
-- Copy --
----------
procedure Copy (File : File_Type;
Offset : Word_32;
Length : Word_32;
Destination : System.Address)
is
use Ada.Streams;
Data : constant Stream_Array_Access := File.Data;
Local_Buffer : Stream_Element_Array
(0 .. Stream_Element_Count (Length) - 1);
for Local_Buffer'Address use Destination;
Start : constant Stream_Element_Offset :=
Data'First
+ Stream_Element_Offset (File.Start + Offset);
Finish : constant Stream_Element_Offset :=
Data'First
+ Stream_Element_Offset (File.Start + Offset + Length
- 1);
begin
Local_Buffer := Data (Start .. Finish);
end Copy;
------------
-- Create --
------------
procedure Create (File : in out File_Type;
Mode : File_Mode;
Name : String)
is
begin
File := (Ada.Strings.Unbounded.To_Unbounded_String (Name),
new Ada.Streams.Stream_Element_Array (0 .. 65535),
Mode, 0, 0, 0);
declare
Stream : Ada.Streams.Stream_IO.File_Type;
begin
Ada.Streams.Stream_IO.Create
(Stream, Ada.Streams.Stream_IO.Out_File, Name);
Ada.Streams.Stream_IO.Close (Stream);
end;
end Create;
--------------------
-- Current_Offset --
--------------------
function Current_Offset (File : File_Type) return Word_32 is
begin
return File.Offset;
end Current_Offset;
-----------------
-- End_Of_File --
-----------------
function End_Of_File (File : File_Type) return Boolean is
begin
return File.Offset >= Word_32 (File.Size);
end End_Of_File;
-----------
-- Flush --
-----------
procedure Flush
(File : File_Type)
is
use Ada.Streams;
use Ada.Streams.Stream_IO;
Stream : Ada.Streams.Stream_IO.File_Type;
Path : constant String :=
Ada.Strings.Unbounded.To_String (File.Path);
begin
if Ada.Directories.Exists (Path) then
Open (Stream, Append_File, Path);
else
Create (Stream, Out_File, Path);
end if;
Write (Stream, File.Data (0 .. File.Size - 1));
Close (Stream);
end Flush;
---------------
-- Hex_Image --
---------------
function Hex_Image (Value : Word_32) return String is
begin
return Hex_Image (Word_16 (Value / 65536)) &
Hex_Image (Word_16 (Value mod 65536));
end Hex_Image;
---------------
-- Hex_Image --
---------------
function Hex_Image (Value : Word_16) return String is
Result : String (1 .. 4);
V : Word_16 := Value;
begin
for I in reverse Result'Range loop
declare
Digit : constant Word_16 := V mod 16;
begin
if Digit < 10 then
Result (I) := Character'Val (Digit + 48);
else
Result (I) := Character'Val (Digit + 55);
end if;
end;
V := V / 16;
end loop;
return Result;
end Hex_Image;
---------------
-- Hex_Image --
---------------
function Hex_Image (Value : Word_8) return String is
Result : String (1 .. 2);
V : Word_8 := Value;
begin
for I in reverse Result'Range loop
declare
Digit : constant Word_8 := V mod 16;
begin
if Digit < 10 then
Result (I) := Character'Val (Digit + 48);
else
Result (I) := Character'Val (Digit + 55);
end if;
end;
V := V / 16;
end loop;
return Result;
end Hex_Image;
------------
-- Length --
------------
function Length (File : File_Type) return Word_32 is
begin
return Word_32 (File.Size);
end Length;
----------
-- Open --
----------
procedure Open (File : in out File_Type;
Mode : File_Mode;
Name : String)
is
pragma Assert (Mode = In_File);
use Ada.Streams;
Length : constant Stream_Element_Count :=
Stream_Element_Count (Ada.Directories.Size (Name));
Stream : Ada.Streams.Stream_IO.File_Type;
Last : Stream_Element_Offset;
begin
File.Data :=
new Stream_Element_Array (0 .. Length - 1);
File.Mode := In_File;
File.Size := Length;
File.Start := 0;
Ada.Streams.Stream_IO.Open
(Stream, Ada.Streams.Stream_IO.In_File, Name);
Ada.Streams.Stream_IO.Read (Stream, File.Data.all, Last);
pragma Assert (Last = Length or else Last = Length - 1);
Ada.Streams.Stream_IO.Close (Stream);
end Open;
----------
-- Read --
----------
procedure Read (File : File_Type;
Item : out Word_32;
Offset : Word_32)
is
begin
Copy (File, Offset, 4, Item'Address);
end Read;
----------
-- Read --
----------
procedure Read (File : File_Type;
Item : out Word_16;
Offset : Word_32)
is
begin
Copy (File, Offset, 2, Item'Address);
end Read;
----------
-- Read --
----------
procedure Read (File : File_Type;
Item : out Word_8;
Offset : Word_32)
is
begin
Copy (File, Offset, 1, Item'Address);
end Read;
----------
-- Read --
----------
procedure Read (File : in out File_Type;
Item : out Integer_32)
is
begin
Read (File, Item'Size, Item'Address);
end Read;
----------
-- Read --
----------
procedure Read (File : in out File_Type;
Item : out Integer_16)
is
begin
Read (File, Item'Size, Item'Address);
end Read;
----------
-- Read --
----------
procedure Read (File : in out File_Type;
Item : out Integer_8)
is
begin
Read (File, Item'Size, Item'Address);
end Read;
----------
-- Read --
----------
procedure Read (File : in out File_Type;
Item : out String)
is
X : Word_8;
begin
for I in Item'Range loop
Read (File, X);
Item (I) := Character'Val (X);
end loop;
end Read;
----------
-- Read --
----------
function Read (File : File_Type;
Offset : Word_32;
Terminator : Character := Character'Val (0))
return String
is
Current : Word_32 := File.Start + Offset;
X : Word_8;
Index : Natural := 0;
Result : String (1 .. 64);
begin
loop
Read (File, X, Current);
exit when X = Character'Pos (Terminator);
Current := Current + 1;
Index := Index + 1;
Result (Index) := Character'Val (X);
if Index = Result'Last then
return Result & Read (File, Current, Terminator);
end if;
end loop;
return Result (1 .. Index);
end Read;
----------
-- Read --
----------
function Read (File : in out File_Type;
Terminator : Character := Character'Val (0))
return String
is
X : Word_8;
Index : Natural := 0;
Result : String (1 .. 64);
begin
loop
Read (File, X);
exit when X = Character'Pos (Terminator);
Index := Index + 1;
Result (Index) := Character'Val (X);
if Index = Result'Last then
return Result & Read (File, Terminator);
end if;
end loop;
return Result (1 .. Index);
end Read;
----------
-- Read --
----------
procedure Read (File : in out File_Type;
Item : out Word_32)
is
begin
Read (File, Item'Size, Item'Address);
end Read;
----------
-- Read --
----------
procedure Read (File : in out File_Type;
Item : out Word_16)
is
begin
Read (File, Item'Size, Item'Address);
end Read;
----------
-- Read --
----------
procedure Read (File : in out File_Type;
Item : out Word_8)
is
begin
Read (File, Item'Size, Item'Address);
end Read;
----------
-- Read --
----------
procedure Read (File : in out File_Type;
Size : Word_32;
Destination : System.Address)
is
use Ada.Streams;
Data : constant Stream_Array_Access := File.Data;
Unit_Size : constant Word_32 :=
Size / Stream_Element'Size;
Local_Buffer : Stream_Element_Array
(0 .. Stream_Element_Count (Unit_Size) - 1);
for Local_Buffer'Address use Destination;
Start : constant Stream_Element_Offset :=
Data'First
+ Stream_Element_Offset (File.Offset + File.Start);
Finish : constant Stream_Element_Offset :=
Data'First +
Stream_Element_Offset
(File.Offset + File.Start + Unit_Size) - 1;
begin
Local_Buffer := Data (Start .. Finish);
File.Offset := File.Offset + Unit_Size;
end Read;
----------------
-- Set_Offset --
----------------
procedure Set_Offset (File : in out File_Type;
Offset : Word_32)
is
begin
File.Offset := Offset;
end Set_Offset;
----------
-- Skip --
----------
procedure Skip
(File : in out File_Type;
Offset : Word_32)
is
begin
File.Offset := File.Offset + Offset;
end Skip;
----------
-- View --
----------
function View
(File : File_Type)
return File_Type
is
begin
return View_File : File_Type := File do
View_File.Mode := In_File;
end return;
end View;
----------
-- View --
----------
function View
(File : File_Type;
Start : Word_32;
Length : Word_32)
return File_Type
is
begin
return View_File : File_Type := File do
View_File.Mode := In_File;
View_File.Start := Start;
View_File.Size := Ada.Streams.Stream_Element_Count (Length);
end return;
end View;
-----------
-- Write --
-----------
procedure Write (File : in out File_Type;
Item : Word_8)
is
use Ada.Streams;
begin
if File.Data'Last + 1 = File.Size then
Flush (File);
File.Size := 0;
end if;
File.Data (File.Size) := Stream_Element (Item);
File.Size := File.Size + 1;
end Write;
-----------
-- Write --
-----------
procedure Write (File : in out File_Type;
Item : Word_16)
is
begin
Write (File, 2, Item'Address);
end Write;
-----------
-- Write --
-----------
procedure Write (File : in out File_Type;
Item : Word_32)
is
begin
Write (File, 4, Item'Address);
end Write;
-----------
-- Write --
-----------
procedure Write (File : in out File_Type;
Length : Word_32;
Source : System.Address)
is
use Ada.Streams;
Data : Stream_Element_Array (1 .. Stream_Element_Count (Length));
for Data'Address use Source;
begin
for I in Data'Range loop
Write (File, Word_8 (Data (I)));
end loop;
end Write;
-----------
-- Write --
-----------
procedure Write (File : in out File_Type;
Text : String)
is
begin
for Ch of Text loop
Write (File, Word_8'(Character'Pos (Ch)));
end loop;
end Write;
end WL.Binary_IO;
|