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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- ADA.STRINGS.TEXT_OUTPUT.BASIC_FILES --
-- --
-- B o d y --
-- --
-- Copyright (C) 2020, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- 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/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Ada.Strings.Text_Output.Utils; use Ada.Strings.Text_Output.Utils;
package body Ada.Strings.Text_Output.Basic_Files is
use type OS.File_Descriptor;
function Create_From_FD
(FD : OS.File_Descriptor;
Indent_Amount : Natural;
Chunk_Length : Positive) return File;
-- Create a file from an OS file descriptor
function Create_From_FD
(FD : OS.File_Descriptor;
Indent_Amount : Natural;
Chunk_Length : Positive) return File
is
begin
if FD = OS.Invalid_FD then
raise Program_Error with OS.Errno_Message;
end if;
return Result : File (Chunk_Length) do
Result.Indent_Amount := Indent_Amount;
Result.Cur_Chunk := Result.Initial_Chunk'Unchecked_Access;
Result.FD := FD;
end return;
end Create_From_FD;
function Create_File
(Name : String;
Indent_Amount : Natural := Default_Indent_Amount;
Chunk_Length : Positive := Default_Chunk_Length) return File
is
begin
return Create_From_FD
(OS.Create_File (Name, Fmode => OS.Text),
Indent_Amount, Chunk_Length);
end Create_File;
function Create_New_File
(Name : String;
Indent_Amount : Natural := Default_Indent_Amount;
Chunk_Length : Positive := Default_Chunk_Length) return File
is
begin
return Create_From_FD
(OS.Create_New_File (Name, Fmode => OS.Text),
Indent_Amount, Chunk_Length);
end Create_New_File;
procedure Close (S : in out File'Class) is
Status : Boolean;
begin
Flush (S);
if S.FD not in OS.Standout | OS.Standerr then -- Don't close these
OS.Close (S.FD, Status);
if not Status then
raise Program_Error with OS.Errno_Message;
end if;
end if;
end Close;
overriding procedure Full_Method (S : in out File) renames Flush_Method;
overriding procedure Flush_Method (S : in out File) is
pragma Assert (S.Cur_Chunk = S.Initial_Chunk'Unchecked_Access);
Res : constant Integer :=
OS.Write (S.FD, S.Cur_Chunk.Chars'Address, S.Last);
begin
if Res /= S.Last then
raise Program_Error with OS.Errno_Message;
end if;
S.Last := 0;
end Flush_Method;
The_Stdout : aliased File :=
Create_From_FD (OS.Standout,
Indent_Amount => Default_Indent_Amount,
Chunk_Length => Default_Chunk_Length);
The_Stderr : aliased File :=
Create_From_FD (OS.Standerr,
Indent_Amount => Default_Indent_Amount,
Chunk_Length => Default_Chunk_Length);
function Standard_Output return Sink_Access is (The_Stdout'Access);
function Standard_Error return Sink_Access is (The_Stderr'Access);
end Ada.Strings.Text_Output.Basic_Files;
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