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|
-- GHDL Run Time (GRT) - VHDL files subprograms.
-- Copyright (C) 2002 - 2014 Tristan Gingold
--
-- GHDL is free software; you can redistribute it and/or modify it under
-- the terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 2, or (at your option) any later
-- version.
--
-- GHDL is distributed in the hope that it will be useful, but WITHOUT ANY
-- WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with GCC; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
--
-- As a special exception, if other files instantiate generics from this
-- unit, or you link this unit with other files to produce an executable,
-- this unit does not by itself cause the resulting executable to be
-- covered by the GNU General Public License. This exception does not
-- however invalidate any other reasons why the executable file might be
-- covered by the GNU Public License.
with Grt.Stdio; use Grt.Stdio;
with Grt.C; use Grt.C;
with Grt.Table;
with System; use System;
pragma Elaborate_All (Grt.Table);
package body Grt.Files_Operations is
subtype C_Files is Grt.Stdio.FILEs;
Auto_Flush : constant Boolean := False;
type File_Entry_Type is record
-- The corresponding C stream.
Stream : C_Files;
Signature : Ghdl_C_String;
-- Open kind: r, a or w.
Kind : Character;
Is_Text : Boolean;
-- True if the file entry is used.
Is_Alive : Boolean;
end record;
package Files_Table is new Grt.Table
(Table_Component_Type => File_Entry_Type,
Table_Index_Type => Ghdl_File_Index,
Table_Low_Bound => 1,
Table_Initial => 2);
-- Get the C stream for INDEX.
procedure Get_File
(Index : Ghdl_File_Index; Res : out C_Files; Status : out Op_Status) is
begin
if Index not in Files_Table.First .. Files_Table.Last then
Status := Op_Bad_Index;
else
Status := Op_Ok;
Res := Files_Table.Table (Index).Stream;
end if;
end Get_File;
-- Assume INDEX is correct.
function Is_Open (Index : Ghdl_File_Index) return Boolean is
begin
return Files_Table.Table (Index).Stream /= NULL_Stream;
end Is_Open;
-- Assume INDEX is correct.
function Get_Kind (Index : Ghdl_File_Index) return Character is
begin
return Files_Table.Table (Index).Kind;
end Get_Kind;
procedure Check_File_Mode
(Index : Ghdl_File_Index; Is_Text : Boolean; Status : out Op_Status) is
begin
if Files_Table.Table (Index).Is_Text /= Is_Text then
Status := Op_Bad_Mode;
else
Status := Op_Ok;
end if;
end Check_File_Mode;
procedure Check_Read
(Index : Ghdl_File_Index; Is_Text : Boolean; Status : out Op_Status) is
begin
Check_File_Mode (Index, Is_Text, Status);
if Status /= Op_Ok then
return;
end if;
-- LRM08 5.5.2 File operations
-- It is an error if the access mode of the file object is write-only
-- or if the file object is not open.
if not Is_Open (Index) then
Status := Op_Not_Open;
return;
end if;
if Get_Kind (Index) /= 'r' then
Status := Op_Read_Write_File;
return;
end if;
Status := Op_Ok;
end Check_Read;
procedure Check_Write
(Index : Ghdl_File_Index; Is_Text : Boolean; Status : out Op_Status) is
begin
Check_File_Mode (Index, Is_Text, Status);
if Status /= Op_Ok then
return;
end if;
-- LRM08 5.5.2 File operations
-- It is an error if the access mode of the file object is read-only
-- or if the file object is not open.
if not Is_Open (Index) then
Status := Op_Not_Open;
return;
end if;
if Get_Kind (Index) = 'r' then
Status := Op_Write_Read_File;
return;
end if;
Status := Op_Ok;
end Check_Write;
function Create_File
(Is_Text : Boolean; Kind : Character; Sig : Ghdl_C_String)
return Ghdl_File_Index is
begin
Files_Table.Append ((Stream => NULL_Stream,
Signature => Sig,
Kind => Kind,
Is_Text => Is_Text,
Is_Alive => True));
return Files_Table.Last;
end Create_File;
procedure Destroy_File
(Is_Text : Boolean; Index : Ghdl_File_Index; Status : out Op_Status)
is
Cstream : C_Files;
begin
Get_File (Index, Cstream, Status);
if Status /= Op_Ok then
return;
end if;
if Cstream /= NULL_Stream then
Status := Op_Not_Closed;
return;
end if;
Check_File_Mode (Index, Is_Text, Status);
if Status /= Op_Ok then
return;
end if;
-- Cleanup.
Files_Table.Table (Index).Is_Alive := False;
if Index = Files_Table.Last then
while Files_Table.Last >= Files_Table.First
and then Files_Table.Table (Files_Table.Last).Is_Alive = False
loop
Files_Table.Decrement_Last;
end loop;
end if;
end Destroy_File;
function Ghdl_Text_File_Elaborate return Ghdl_File_Index is
begin
return Create_File (True, ' ', null);
end Ghdl_Text_File_Elaborate;
function Ghdl_File_Elaborate (Sig : Ghdl_C_String) return Ghdl_File_Index
is
begin
return Create_File (False, ' ', Sig);
end Ghdl_File_Elaborate;
procedure Ghdl_Text_File_Finalize
(File : Ghdl_File_Index; Status : out Op_Status) is
begin
Destroy_File (True, File, Status);
end Ghdl_Text_File_Finalize;
procedure Ghdl_File_Finalize
(File : Ghdl_File_Index; Status : out Op_Status) is
begin
Destroy_File (False, File, Status);
end Ghdl_File_Finalize;
procedure Ghdl_File_Endfile
(File : Ghdl_File_Index; Status : out Op_Status)
is
Stream : C_Files;
C : int;
begin
Get_File (File, Stream, Status);
if Status /= Op_Ok then
return;
end if;
-- LRM93 3.4.1 File Operations
-- LRM08 5.5.2 File Operations
-- It is an error if ENDFILE is called on a file object that is not
-- open.
if Stream = NULL_Stream then
Status := Op_Not_Open;
return;
end if;
-- Default: returns True.
Status := Op_End_Of_File;
-- LRM93 3.4.1 File Operations
-- LRM08 5.5.2 File Operations
-- Function ENDFILE always returns TRUE for an open file object whose
-- access mode is write-only.
if Get_Kind (File) /= 'r' then
return;
end if;
if feof (Stream) /= 0 then
return;
end if;
C := fgetc (Stream);
if C < 0 then
return;
end if;
if ungetc (C, Stream) /= C then
Status := Op_Ungetc_Error;
return;
end if;
Status := Op_Ok;
return;
end Ghdl_File_Endfile;
Sig_Header : constant String := "#GHDL-BINARY-FILE-0.0" & Nl;
Std_Output_Name : constant String := "STD_OUTPUT" & NUL;
Std_Input_Name : constant String := "STD_INPUT" & NUL;
procedure File_Open (File : Ghdl_File_Index;
Mode : Ghdl_I32;
Name : Ghdl_C_String;
Status : out Op_Status)
is
Str_Mode : String (1 .. 3);
F : C_Files;
Sig : Ghdl_C_String;
Sig_Len : Natural;
Kind : Character;
begin
Get_File (File, F, Status);
if Status /= Op_Ok then
return;
end if;
if F /= NULL_Stream then
-- File was already open.
Status := Op_Not_Closed;
return;
end if;
case Mode is
when Read_Mode =>
Kind := 'r';
when Write_Mode =>
Kind := 'w';
when Append_Mode =>
Kind := 'a';
when others =>
-- Bad mode, cannot happen.
Status := Op_Bad_Mode;
return;
end case;
if Strcmp (Name, To_Ghdl_C_String (Std_Input_Name'Address)) = 0 then
if Mode /= Read_Mode then
Status := Op_Mode_Error;
return;
end if;
F := stdin;
elsif Strcmp (Name, To_Ghdl_C_String (Std_Output_Name'Address)) = 0 then
if Mode /= Write_Mode then
Status := Op_Mode_Error;
return;
end if;
F := stdout;
else
Str_Mode (1) := Kind;
if Files_Table.Table (File).Is_Text then
Str_Mode (2) := NUL;
else
Str_Mode (2) := 'b';
Str_Mode (3) := NUL;
end if;
F := fopen (To_Address (Name), Str_Mode'Address);
if F = NULL_Stream then
Status := Op_Name_Error;
return;
end if;
-- if Grt.Options.Unbuffered_Writes and Mode /= Read_Mode then
-- setbuf (F, NULL_voids);
-- end if;
end if;
Sig := Files_Table.Table (File).Signature;
if Sig /= null then
Sig_Len := strlen (Sig);
case Mode is
when Write_Mode =>
if fwrite (Sig_Header'Address, 1, Sig_Header'Length, F)
/= Sig_Header'Length
then
Status := Op_Write_Error;
return;
end if;
if fwrite (Sig (1)'Address, 1, size_t (Sig_Len), F)
/= size_t (Sig_Len)
then
Status := Op_Write_Error;
return;
end if;
when Read_Mode =>
declare
Hdr : String (1 .. Sig_Header'Length);
Sig_Buf : String (1 .. Sig_Len);
begin
if fread (Hdr'Address, 1, Hdr'Length, F) /= Hdr'Length then
Status := Op_Read_Error;
return;
end if;
if Hdr /= Sig_Header then
Status := Op_Signature_Error;
return;
end if;
if fread (Sig_Buf'Address, 1, Sig_Buf'Length, F)
/= Sig_Buf'Length
then
Status := Op_Read_Error;
return;
end if;
if Sig_Buf /= Sig (1 .. Sig_Len) then
Status := Op_Signature_Error;
return;
end if;
end;
when Append_Mode =>
null;
when others =>
null;
end case;
end if;
Files_Table.Table (File).Stream := F;
Files_Table.Table (File).Kind := Kind;
Status := Op_Ok;
end File_Open;
procedure Ghdl_Text_File_Open (File : Ghdl_File_Index;
Mode : Ghdl_I32;
Name : Ghdl_C_String;
Status : out Op_Status) is
begin
Check_File_Mode (File, True, Status);
if Status /= Op_Ok then
return;
end if;
File_Open (File, Mode, Name, Status);
end Ghdl_Text_File_Open;
procedure Ghdl_File_Open (File : Ghdl_File_Index;
Mode : Ghdl_I32;
Name : Ghdl_C_String;
Status : out Op_Status) is
begin
Check_File_Mode (File, False, Status);
if Status /= Op_Ok then
return;
end if;
File_Open (File, Mode, Name, Status);
end Ghdl_File_Open;
procedure Ghdl_Text_Write (File : Ghdl_File_Index; Str : Std_String_Ptr;
Status : out Op_Status)
is
Res : C_Files;
Len : size_t;
R : size_t;
begin
Get_File (File, Res, Status);
if Status /= Op_Ok then
return;
end if;
Check_Write (File, True, Status);
if Status /= Op_Ok then
return;
end if;
Len := size_t (Str.Bounds.Dim_1.Length);
if Len = 0 then
Status := Op_Ok;
return;
end if;
R := fwrite (Str.Base (0)'Address, Len, 1, Res);
if R /= 1 then
Status := Op_Write_Error;
return;
end if;
if Auto_Flush then
fflush (Res);
end if;
Status := Op_Ok;
end Ghdl_Text_Write;
procedure Ghdl_Write_Scalar (File : Ghdl_File_Index;
Ptr : Ghdl_Ptr;
Length : Ghdl_Index_Type;
Status : out Op_Status)
is
Res : C_Files;
R : size_t;
begin
Get_File (File, Res, Status);
if Status /= Op_Ok then
return;
end if;
Check_Write (File, False, Status);
if Status /= Op_Ok then
return;
end if;
R := fwrite (System.Address (Ptr), size_t (Length), 1, Res);
if R /= 1 then
Status := Op_Write_Error;
return;
end if;
if Auto_Flush then
fflush (Res);
end if;
Status := Op_Ok;
end Ghdl_Write_Scalar;
procedure Ghdl_Read_Scalar (File : Ghdl_File_Index;
Ptr : Ghdl_Ptr;
Length : Ghdl_Index_Type;
Status : out Op_Status)
is
Res : C_Files;
R : size_t;
begin
Get_File (File, Res, Status);
if Status /= Op_Ok then
return;
end if;
Check_Read (File, False, Status);
if Status /= Op_Ok then
return;
end if;
R := fread (System.Address (Ptr), size_t (Length), 1, Res);
if R /= 1 then
Status := Op_Read_Error;
return;
end if;
Status := Op_Ok;
end Ghdl_Read_Scalar;
procedure Ghdl_Text_Read_Length (File : Ghdl_File_Index;
Str : Std_String_Ptr;
Status : out Op_Status;
Length : out Std_Integer)
is
Stream : C_Files;
C : int;
Len : Ghdl_Index_Type;
begin
Length := 0;
Get_File (File, Stream, Status);
if Status /= Op_Ok then
return;
end if;
Check_Read (File, True, Status);
if Status /= Op_Ok then
return;
end if;
Len := Str.Bounds.Dim_1.Length;
-- Read until EOL (or EOF).
-- Store as much as possible.
for I in Ghdl_Index_Type loop
C := fgetc (Stream);
if C < 0 then
Length := Std_Integer (I);
Status := Op_End_Of_File;
return;
end if;
if I < Len then
Str.Base (I) := Character'Val (C);
end if;
-- End of line is '\n' or LF or character # 10.
if C = 10 then
Length := Std_Integer (I + 1);
Status := Op_Ok;
return;
end if;
end loop;
Length := 0;
Status := Op_Ok;
end Ghdl_Text_Read_Length;
procedure Ghdl_Untruncated_Text_Read (File : Ghdl_File_Index;
Buf : Ghdl_C_String;
Len : in out Std_Integer;
Status : out Op_Status)
is
Stream : C_Files;
Max_Len : int;
begin
Get_File (File, Stream, Status);
if Status /= Op_Ok then
return;
end if;
Check_Read (File, True, Status);
if Status /= Op_Ok then
return;
end if;
Max_Len := int (Len);
if fgets (To_Address (Buf), Max_Len, Stream) = Null_Address then
Status := Op_End_Of_File;
return;
end if;
-- Compute the length.
Len := Std_Integer (strlen (Buf));
Status := Op_Ok;
end Ghdl_Untruncated_Text_Read;
procedure File_Close
(File : Ghdl_File_Index; Is_Text : Boolean; Status : out Op_Status)
is
Stream : C_Files;
begin
Get_File (File, Stream, Status);
if Status /= Op_Ok then
return;
end if;
Check_File_Mode (File, Is_Text, Status);
if Status /= Op_Ok then
return;
end if;
-- LRM 3.4.1 File Operations
-- If F is not associated with an external file, then FILE_CLOSE has
-- no effect.
if Stream = NULL_Stream then
Status := Op_Ok;
return;
end if;
if fclose (Stream) /= 0 then
Status := Op_Close_Error;
return;
end if;
Files_Table.Table (File).Stream := NULL_Stream;
Status := Op_Ok;
end File_Close;
procedure Ghdl_Text_File_Close
(File : Ghdl_File_Index; Status : out Op_Status) is
begin
File_Close (File, True, Status);
end Ghdl_Text_File_Close;
procedure Ghdl_File_Close
(File : Ghdl_File_Index; Status : out Op_Status) is
begin
File_Close (File, False, Status);
end Ghdl_File_Close;
procedure Ghdl_File_Flush (File : Ghdl_File_Index; Status : out Op_Status)
is
Stream : C_Files;
begin
Get_File (File, Stream, Status);
if Status /= Op_Ok then
return;
end if;
-- LRM08 5.5.2 File Operations
-- For the WRITE and FLUSH procedures, it is an error if the access
-- mode of the file object is read-only or if the file is not open.
if Stream = NULL_Stream then
Status := Op_Not_Open;
return;
end if;
if Get_Kind (File) = 'r' then
Status := Op_Write_Read_File;
return;
end if;
fflush (Stream);
Status := Op_Ok;
end Ghdl_File_Flush;
end Grt.Files_Operations;
|