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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, see <gnu.org/licenses>.
with Types; use Types;
with Files_Map;
with Name_Table;
with Vhdl.Errors; use Vhdl.Errors;
with Grt.Types; use Grt.Types;
with Grt.Vhdl_Types; use Grt.Vhdl_Types;
with Grt.Files_Operations; use Grt.Files_Operations;
with Grt.Stdio;
with Elab.Memtype; use Elab.Memtype;
with Elab.Vhdl_Objtypes; use Elab.Vhdl_Objtypes;
with Elab.Vhdl_Expr; use Elab.Vhdl_Expr;
with Elab.Vhdl_Errors; use Elab.Vhdl_Errors;
package body Elab.Vhdl_Files is
-- Variables to store the search path.
Current_Unit : Node := Null_Node;
Current_Pfx_Len : Integer := -1;
Current_Pfx_Id : Name_Id := No_Name_Id;
-- 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_Elab (+Loc, "file operation failed");
raise File_Execution_Error;
end File_Error;
-- VAL represents a string, so an array of characters.
procedure Convert_String (Val : Valtyp; Res : out String)
is
Vtyp : constant Type_Acc := Val.Typ;
Vlen : constant Uns32 := Vtyp.Abound.Len;
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.Alast);
pragma Assert (Vtyp.Abound.Len = Res'Length);
for I in 1 .. Vlen loop
Res (Res'First + Natural (I - 1)) :=
Character'Val (Read_U8 (Val.Val.Mem + Size_Type (I - 1)));
end loop;
end Convert_String;
-- Convert filename VAL to RES + LEN.
procedure Convert_File_Name (Val : Valtyp;
Res : out C_File_Name;
Len : out Natural;
Status : out Op_Status)
is
Name : constant Valtyp := Strip_Alias_Const (Val);
pragma Unreferenced (Val);
begin
Len := Natural (Name.Typ.Abound.Len);
if Len >= Res'Length - 1 then
Status := Op_Filename_Error;
return;
end if;
Convert_String (Name, Res (1 .. Len));
Res (Len + 1) := Grt.Types.NUL;
Status := Op_Ok;
end Convert_File_Name;
procedure Set_Design_Unit (Unit : Node) is
begin
Current_Unit := Unit;
Current_Pfx_Id := No_Name_Id;
end Set_Design_Unit;
function Synth_Open (Name : Ghdl_C_String; Mode : Ghdl_C_String)
return Grt.Stdio.FILEs
is
use Grt.Stdio;
Res : FILEs;
begin
-- Try to open the file using the name given.
Res := fopen (To_Address (Name), To_Address (Mode));
if Res /= NULL_Stream then
-- File found.
return Res;
end if;
-- Return now if the search path is not used:
-- mode is not read, or
-- no search path given.
if Mode (1) /= 'r' then
return Res;
end if;
if Current_Unit = Null_Node then
return NULL_Stream;
end if;
-- The search path is given by the current unit. Extract it from the
-- filename (and cache the result).
if Current_Pfx_Id = No_Name_Id then
declare
use Files_Map;
use Name_Table;
Loc : Location_Type;
Sfe : Source_File_Entry;
Name_Len : Natural;
Name_Ptr : Thin_String_Ptr;
begin
Loc := Get_Location (Current_Unit);
Sfe := Location_To_File (Loc);
Current_Pfx_Id := Get_File_Name (Sfe);
Name_Len := Get_Name_Length (Current_Pfx_Id);
Name_Ptr := Get_Name_Ptr (Current_Pfx_Id);
Current_Pfx_Len := 0;
for I in reverse 1 .. Name_Len loop
if Name_Ptr (I) = '/' or else Name_Ptr (I) = '\' then
Current_Pfx_Len := I;
exit;
end if;
end loop;
end;
end if;
-- No prefix.
if Current_Pfx_Len = 0 then
return NULL_Stream;
end if;
-- Try with prefix + name.
declare
use Name_Table;
Name_Len : constant Natural := strlen (Name);
Pfx : constant Thin_String_Ptr := Get_Name_Ptr (Current_Pfx_Id);
Name2 : String (1 .. Name_Len + Current_Pfx_Len + 1);
begin
Name2 (1 .. Current_Pfx_Len) := Pfx (1 .. Current_Pfx_Len);
Name2 (Current_Pfx_Len + 1 .. Current_Pfx_Len + Name_Len) :=
Name (1 .. Name_Len);
Name2 (Name2'Last) := NUL;
Res := fopen (Name2'Address, To_Address (Mode));
end;
return Res;
end Synth_Open;
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 : Valtyp;
C_Name : C_File_Name;
C_Name_Len : Natural;
Mode : Valtyp;
F : File_Index;
File_Mode : Ghdl_I32;
Status : Op_Status;
begin
-- Use our own handler to open a file.
-- We need to do this assignment only once, but it is simpler to do it
-- here.
Open_Handler := Synth_Open'Access;
if Get_Text_File_Flag (File_Type) then
F := Ghdl_Text_File_Elaborate;
else
declare
File_Typ : Type_Acc;
Cstr : Ghdl_C_String;
begin
File_Typ := Get_Subtype_Object (Syn_Inst, File_Type);
if File_Typ.File_Signature = null then
Cstr := null;
else
Cstr := To_Ghdl_C_String (File_Typ.File_Signature.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 := Exec_Expression_With_Basetype (Syn_Inst, External_Name);
if Open_Kind /= Null_Node then
Mode := Exec_Expression (Syn_Inst, Open_Kind);
File_Mode := Ghdl_I32 (Read_Discrete (Mode));
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_Elab
(+Decl, "cannot open file: " & C_Name (1 .. C_Name_Len));
Set_Error (Syn_Inst);
else
File_Error (Decl, Status);
end if;
end if;
return F;
end Elaborate_File_Declaration;
function Endfile (F : File_Index; Loc : Node) 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 FILE_OPEN (file F : FT;
-- External_Name : String;
-- Open_Kind : File_Open_Kind);
procedure Synth_File_Open
(Syn_Inst : Synth_Instance_Acc; Imp : Node; Loc : Node)
is
Inters : constant Node := Get_Interface_Declaration_Chain (Imp);
F : constant File_Index := Get_Value (Syn_Inst, Inters).Val.File;
Param2 : constant Node := Get_Chain (Inters);
File_Name : constant Valtyp := Get_Value (Syn_Inst, Param2);
Param3 : constant Node := Get_Chain (Param2);
Open_Kind : constant Valtyp := Get_Value (Syn_Inst, Param3);
C_Name : C_File_Name;
C_Name_Len : Natural;
File_Mode : Ghdl_I32;
Status : Op_Status;
begin
Convert_File_Name (File_Name, C_Name, C_Name_Len, Status);
if Status = Op_Ok then
File_Mode := Ghdl_I32 (Read_Discrete (Open_Kind));
if Get_Text_File_Flag (Get_Type (Inters)) 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_Elab
(+Loc, "cannot open file: " & C_Name (1 .. C_Name_Len));
raise File_Execution_Error;
else
File_Error (Loc, Status);
end if;
end if;
end Synth_File_Open;
-- Declaration
-- procedure FILE_OPEN (Status : out FILE_OPEN_STATUS;
-- file F : FT;
-- External_Name : String;
-- Open_Kind : File_Open_Kind);
procedure Synth_File_Open_Status
(Syn_Inst : Synth_Instance_Acc; Imp : Node)
is
Inters : constant Node := Get_Interface_Declaration_Chain (Imp);
Ostatus : constant Valtyp := Get_Value (Syn_Inst, Inters);
Param2 : constant Node := Get_Chain (Inters);
F : constant File_Index := Get_Value (Syn_Inst, Param2).Val.File;
Param3 : constant Node := Get_Chain (Param2);
File_Name : constant Valtyp := Get_Value (Syn_Inst, Param3);
Param4 : constant Node := Get_Chain (Param3);
Open_Kind : constant Valtyp := Get_Value (Syn_Inst, Param4);
C_Name : C_File_Name;
C_Name_Len : Natural;
File_Mode : Ghdl_I32;
Status : Op_Status;
Vstatus : Ghdl_I32;
begin
Convert_File_Name (File_Name, C_Name, C_Name_Len, Status);
if Status = Op_Ok then
File_Mode := Ghdl_I32 (Read_Discrete (Open_Kind));
if Get_Text_File_Flag (Get_Type (Param2)) 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;
case Status is
when Op_Ok =>
Vstatus := Open_Ok;
when Op_Status_Error =>
Vstatus := Status_Error;
when Op_Mode_Error =>
Vstatus := Mode_Error;
when Op_Name_Error
| Op_Signature_Error
| Op_Filename_Error =>
Vstatus := Name_Error;
when Op_End_Of_File
| Op_Ungetc_Error
| Op_Not_Open
| Op_Close_Error
| Op_Read_Write_File
| Op_Write_Read_File
| Op_Read_Error
| Op_Write_Error
| Op_Bad_Index
| Op_Bad_Mode
| Op_Not_Closed =>
raise File_Execution_Error;
end case;
if Is_Static (Ostatus.Val) then
-- Avoid error storm.
Write_Discrete (Ostatus, Int64 (Vstatus));
end if;
end Synth_File_Open_Status;
-- Declaration
-- procedure FILE_CLOSE (file F : FT);
procedure Synth_File_Close
(Syn_Inst : Synth_Instance_Acc; Imp : Node; Loc : Node)
is
Inters : constant Node := Get_Interface_Declaration_Chain (Imp);
F : constant File_Index := Get_Value (Syn_Inst, Inters).Val.File;
Status : Op_Status;
begin
if Get_Text_File_Flag (Get_Type (Inters)) then
Ghdl_Text_File_Close (F, Status);
else
Ghdl_File_Close (F, Status);
end if;
if Status /= Op_Ok then
File_Error (Loc, Status);
end if;
end Synth_File_Close;
-- 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).Val.File;
Param2 : constant Node := Get_Chain (Inters);
Str : constant Valtyp := Get_Value (Syn_Inst, Param2);
Param3 : constant Node := Get_Chain (Param2);
Param_Len : constant Valtyp := Get_Value (Syn_Inst, Param3);
Buf : String (1 .. Natural (Str.Typ.Abound.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
Write_U8 (Str.Val.Mem + Size_Type (I - 1), Character'Pos (Buf (I)));
end loop;
Write_Discrete (Param_Len, Int64 (Len));
end Synth_Untruncated_Text_Read;
procedure File_Read_Value (File : File_Index; Val : Memtyp; Loc : Node)
is
Status : Op_Status;
begin
case Val.Typ.Kind is
when Type_Discrete
| Type_Bit
| Type_Logic
| Type_Float =>
Ghdl_Read_Scalar (File, Ghdl_Ptr (Val.Mem.all'Address),
Ghdl_Index_Type (Val.Typ.Sz), Status);
if Status /= Op_Ok then
File_Error (Loc, Status);
end if;
when Type_Vector
| Type_Array =>
declare
El_Typ : constant Type_Acc := Get_Array_Element (Val.Typ);
Off : Size_Type;
begin
Off := 0;
for I in 1 .. Get_Bound_Length (Val.Typ) loop
File_Read_Value (File, (El_Typ, Val.Mem + Off), Loc);
Off := Off + El_Typ.Sz;
end loop;
end;
when Type_Record =>
for I in Val.Typ.Rec.E'Range loop
File_Read_Value
(File,
(Val.Typ.Rec.E (I).Typ, Val.Mem + Val.Typ.Rec.E (I).Moff),
Loc);
end loop;
when Type_Unbounded_Record
| Type_Unbounded_Array
| Type_Unbounded_Vector
| Type_Protected
| Type_Slice
| Type_File
| Type_Access =>
raise Internal_Error;
end case;
end File_Read_Value;
procedure Synth_File_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).Val.File;
Param2 : constant Node := Get_Chain (Inters);
Value : constant Valtyp := Get_Value (Syn_Inst, Param2);
begin
File_Read_Value (File, (Value.Typ, Value.Val.Mem), Loc);
end Synth_File_Read;
procedure File_Write_Value (File : File_Index; Val : Memtyp; Loc : Node)
is
Status : Op_Status;
begin
case Val.Typ.Kind is
when Type_Discrete
| Type_Bit
| Type_Logic
| Type_Float =>
Ghdl_Write_Scalar (File, Ghdl_Ptr (Val.Mem.all'Address),
Ghdl_Index_Type (Val.Typ.Sz), Status);
if Status /= Op_Ok then
File_Error (Loc, Status);
end if;
when Type_Vector
| Type_Array =>
declare
El_Typ : constant Type_Acc := Get_Array_Element (Val.Typ);
Off : Size_Type;
begin
Off := 0;
for I in 1 .. Get_Bound_Length (Val.Typ) loop
File_Write_Value (File, (El_Typ, Val.Mem + Off), Loc);
Off := Off + El_Typ.Sz;
end loop;
end;
when Type_Record =>
for I in Val.Typ.Rec.E'Range loop
File_Write_Value
(File,
(Val.Typ.Rec.E (I).Typ, Val.Mem + Val.Typ.Rec.E (I).Moff),
Loc);
end loop;
when Type_Unbounded_Record
| Type_Unbounded_Array
| Type_Unbounded_Vector
| Type_Protected
| Type_Slice
| Type_File
| Type_Access =>
raise Internal_Error;
end case;
end File_Write_Value;
function Dir_To_Dir (Dir : Direction_Type) return Ghdl_Dir_Type is
begin
case Dir is
when Dir_To =>
return Grt.Vhdl_Types.Dir_To;
when Dir_Downto =>
return Grt.Vhdl_Types.Dir_Downto;
end case;
end Dir_To_Dir;
procedure File_Write_Text (File : File_Index; Val : Memtyp; Loc : Node)
is
B : Bound_Type;
Status : Op_Status;
Str : Std_String;
Bnd : Std_String_Bound;
begin
B := Val.Typ.Abound;
Bnd.Dim_1 := (Left => Ghdl_I32 (B.Left),
Right => Ghdl_I32 (B.Right),
Dir => Dir_To_Dir (B.Dir),
Length => Ghdl_Index_Type (B.Len));
Str := (Base => To_Std_String_Basep (Val.Mem.all'Address),
Bounds => To_Std_String_Boundp (Bnd'Address));
Ghdl_Text_Write (File, To_Std_String_Ptr (Str'Address), Status);
if Status /= Op_Ok then
File_Error (Loc, Status);
end if;
end File_Write_Text;
procedure Synth_File_Write
(Syn_Inst : Synth_Instance_Acc; Imp : Node; Loc : Node)
is
Inters : constant Node := Get_Interface_Declaration_Chain (Imp);
Is_Text : constant Boolean := Get_Text_File_Flag (Get_Type (Inters));
File : constant File_Index := Get_Value (Syn_Inst, Inters).Val.File;
Param2 : constant Node := Get_Chain (Inters);
Value : constant Valtyp := Get_Value (Syn_Inst, Param2);
begin
if Is_Text then
File_Write_Text (File, (Value.Typ, Value.Val.Mem), Loc);
else
File_Write_Value (File, (Value.Typ, Value.Val.Mem), Loc);
end if;
end Synth_File_Write;
end Elab.Vhdl_Files;
|