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Ingy döt Net 2026-02-01 16:33:20 -08:00
parent 5150844a7d
commit 4bb20c9b71
7735 changed files with 38060 additions and 199180 deletions
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20
Task/Bitwise-IO/Ada/bitwise-io-1.ada
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with Ada.Streams; use Ada.Streams;
with Ada.Finalization;
package Bit_Streams is
type Bit is range 0..1;
type Bit_Array is array (Positive range <>) of Bit;
type Bit_Stream (Channel : not null access Root_Stream_Type'Class) is limited private;
procedure Read (Stream : in out Bit_Stream; Data : out Bit_Array);
procedure Write (Stream : in out Bit_Stream; Data : Bit_Array);
private
type Bit_Stream (Channel : not null access Root_Stream_Type'Class) is
new Ada.Finalization.Limited_Controlled with
record
Read_Count : Natural := 0;
Write_Count : Natural := 0;
Input : Stream_Element_Array (1..1);
Output : Stream_Element_Array (1..1);
end record;
overriding procedure Finalize (Stream : in out Bit_Stream);
end Bit_Streams;

33
Task/Bitwise-IO/Ada/bitwise-io-2.ada
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package body Bit_Streams is
procedure Finalize (Stream : in out Bit_Stream) is
begin
if Stream.Write_Count > 0 then
Stream.Output (1) := Stream.Output (1) * 2**(Stream_Element'Size - Stream.Write_Count);
Stream.Channel.Write (Stream.Output);
end if;
end Finalize;
procedure Read (Stream : in out Bit_Stream; Data : out Bit_Array) is
Last : Stream_Element_Offset;
begin
for Index in Data'Range loop
if Stream.Read_Count = 0 then
Stream.Channel.Read (Stream.Input, Last);
Stream.Read_Count := Stream_Element'Size;
end if;
Data (Index) := Bit (Stream.Input (1) / 2**(Stream_Element'Size - 1));
Stream.Input (1) := Stream.Input (1) * 2;
Stream.Read_Count := Stream.Read_Count - 1;
end loop;
end Read;
procedure Write (Stream : in out Bit_Stream; Data : Bit_Array) is
begin
for Index in Data'Range loop
if Stream.Write_Count = Stream_Element'Size then
Stream.Channel.Write (Stream.Output);
Stream.Write_Count := 0;
end if;
Stream.Output (1) := Stream.Output (1) * 2 or Stream_Element (Data (Index));
Stream.Write_Count := Stream.Write_Count + 1;
end loop;
end Write;
end Bit_Streams;

33
Task/Bitwise-IO/Ada/bitwise-io-3.ada
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with Ada.Streams.Stream_IO; use Ada.Streams.Stream_IO;
with Bit_Streams; use Bit_Streams;
procedure Test_Bit_Streams is
File : File_Type;
ABACUS : Bit_Array :=
( 1,0,0,0,0,0,1, -- A, big endian
1,0,0,0,0,1,0, -- B
1,0,0,0,0,0,1, -- A
1,0,0,0,0,1,1, -- C
1,0,1,0,1,0,1, -- U
1,0,1,0,0,1,1 -- S
);
Data : Bit_Array (ABACUS'Range);
begin
Create (File, Out_File, "abacus.dat");
declare
Bits : Bit_Stream (Stream (File));
begin
Write (Bits, ABACUS);
end;
Close (File);
Open (File, In_File, "abacus.dat");
declare
Bits : Bit_Stream (Stream (File));
begin
Read (Bits, Data);
end;
Close (File);
if Data /= ABACUS then
raise Data_Error;
end if;
end Test_Bit_Streams;