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-- Create declarations for synthesis.
-- Copyright (C) 2017 Tristan Gingold
--
-- This file is part of GHDL.
--
-- This program 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 of the License, or
-- (at your option) any later version.
--
-- This program 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 this program; if not, write to the Free Software
-- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
-- MA 02110-1301, USA.
with Types; use Types;
with Grt.Types; use Grt.Types;
with Grt.Files_Operations; use Grt.Files_Operations;
with Vhdl.Annotations;
with Synth.Expr; use Synth.Expr;
with Synth.Errors; use Synth.Errors;
package body Synth.Files_Operations is
-- Representation of file name compatible with C (so NUL terminated).
subtype C_File_Name is String (1 .. 1025);
procedure File_Error (Loc : Node; Status : Op_Status);
pragma No_Return (File_Error);
procedure File_Error (Loc : Node; Status : Op_Status) is
begin
pragma Assert (Status /= Op_Ok);
Error_Msg_Synth (+Loc, "file operation failed");
raise File_Execution_Error;
end File_Error;
-- VAL represents a string, so an array of characters.
procedure Convert_String (Val : Value_Acc; Res : out String)
is
Vtyp : constant Type_Acc := Val.Typ;
begin
pragma Assert (Vtyp.Kind = Type_Array);
pragma Assert (Vtyp.Arr_El.Kind = Type_Discrete);
pragma Assert (Vtyp.Arr_El.W in 7 .. 8); -- Could be 7 in vhdl87
pragma Assert (Vtyp.Abounds.Len = 1);
pragma Assert (Vtyp.Abounds.D (1).Len = Res'Length);
for I in Val.Arr.V'Range loop
Res (Res'First + Natural (I - 1)) :=
Character'Val (Val.Arr.V (I).Scal);
end loop;
end Convert_String;
-- Convert filename VAL to RES + LEN.
procedure Convert_File_Name (Val : Value_Acc;
Res : out C_File_Name;
Len : out Natural;
Status : out Op_Status) is
begin
Len := Natural (Val.Arr.Len);
if Len >= Res'Length - 1 then
Status := Op_Filename_Error;
return;
end if;
Convert_String (Val, Res (1 .. Len));
Res (Len + 1) := Grt.Types.NUL;
Status := Op_Ok;
end Convert_File_Name;
function Elaborate_File_Declaration
(Syn_Inst : Synth_Instance_Acc; Decl : Node) return File_Index
is
File_Type : constant Node := Get_Type (Decl);
External_Name : constant Node := Get_File_Logical_Name (Decl);
Open_Kind : constant Node := Get_File_Open_Kind (Decl);
File_Name : Value_Acc;
C_Name : C_File_Name;
C_Name_Len : Natural;
Mode : Value_Acc;
F : File_Index;
File_Mode : Ghdl_I32;
Status : Op_Status;
begin
if Get_Text_File_Flag (File_Type) then
F := Ghdl_Text_File_Elaborate;
else
declare
Sig : constant String_Acc :=
Vhdl.Annotations.Get_Info (File_Type).File_Signature;
Cstr : Ghdl_C_String;
begin
if Sig = null then
Cstr := null;
else
Cstr := To_Ghdl_C_String (Sig.all'Address);
end if;
F := Ghdl_File_Elaborate (Cstr);
end;
end if;
-- LRM93 4.3.1.4
-- If file open information is not included in a given file declaration,
-- then the file declared by the declaration is not opened when the file
-- declaration is elaborated.
if External_Name = Null_Node then
return F;
end if;
File_Name := Synth_Expression_With_Basetype (Syn_Inst, External_Name);
if Open_Kind /= Null_Node then
Mode := Synth_Expression (Syn_Inst, Open_Kind);
File_Mode := Ghdl_I32 (Mode.Scal);
else
case Get_Mode (Decl) is
when Iir_In_Mode =>
File_Mode := Read_Mode;
when Iir_Out_Mode =>
File_Mode := Write_Mode;
when others =>
raise Internal_Error;
end case;
end if;
Convert_File_Name (File_Name, C_Name, C_Name_Len, Status);
if Status = Op_Ok then
if Get_Text_File_Flag (File_Type) then
Ghdl_Text_File_Open
(F, File_Mode, To_Ghdl_C_String (C_Name'Address), Status);
else
Ghdl_File_Open
(F, File_Mode, To_Ghdl_C_String (C_Name'Address), Status);
end if;
end if;
if Status /= Op_Ok then
if Status = Op_Name_Error then
Error_Msg_Synth
(+Decl, "cannot open file: " & C_Name (1 .. C_Name_Len));
raise File_Execution_Error;
else
File_Error (Decl, Status);
end if;
end if;
return F;
end Elaborate_File_Declaration;
function Endfile (F : File_Index; Loc : Syn_Src) return Boolean
is
Status : Op_Status;
begin
Ghdl_File_Endfile (F, Status);
if Status = Op_Ok then
return False;
elsif Status = Op_End_Of_File then
return True;
else
File_Error (Loc, Status);
end if;
end Endfile;
-- Declaration:
-- procedure untruncated_text_read --!V87
-- (file f : text; str : out string; len : out natural); --!V87
procedure Synth_Untruncated_Text_Read (Syn_Inst : Synth_Instance_Acc;
Imp : Node;
Loc : Node)
is
Inters : constant Node := Get_Interface_Declaration_Chain (Imp);
File : constant File_Index := Get_Value (Syn_Inst, Inters).File;
Param2 : constant Node := Get_Chain (Inters);
Str : constant Value_Acc := Get_Value (Syn_Inst, Param2);
Param3 : constant Node := Get_Chain (Param2);
Param_Len : constant Value_Acc := Get_Value (Syn_Inst, Param3);
Buf : String (1 .. Natural (Str.Arr.Len));
Len : Std_Integer;
Status : Op_Status;
begin
Len := Std_Integer (Buf'Last);
Ghdl_Untruncated_Text_Read
(File, To_Ghdl_C_String (Buf'Address), Len, Status);
if Status /= Op_Ok then
File_Error (Loc, Status);
end if;
for I in 1 .. Natural (Len) loop
Str.Arr.V (Iir_Index32 (I)).Scal := Character'Pos (Buf (I));
end loop;
Param_Len.Scal := Int64 (Len);
end Synth_Untruncated_Text_Read;
end Synth.Files_Operations;
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