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613 | -- Abstract:
--
-- See spec
--
-- Copyright (C) 2009, 2014-2015, 2017 - 2023 Free Software Foundation, Inc.
--
-- This file is part of the WisiToken package.
--
-- The WisiToken package 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 3, or
-- (at your option) any later version. The WisiToken package 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 distributed with the WisiToken package;
-- see file GPL.txt. 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 Ada.Characters.Handling;
with Ada.Streams.Stream_IO;
with Ada.Strings.Fixed;
package body WisiToken is
function Padded_Image (Item : in Token_ID; Desc : in Descriptor) return String
is begin
return Ada.Strings.Fixed.Head
(Desc.Image (Item).all,
(if Item in Desc.First_Terminal .. Desc.Last_Terminal
then Desc.Terminal_Image_Width
else Desc.Image_Width));
end Padded_Image;
function Image (Item : in Token_ID; Desc : in Descriptor) return String
is begin
return (if Item = Invalid_Token_ID then "-" else Desc.Image (Item).all);
end Image;
procedure Put_Tokens (Descriptor : in WisiToken.Descriptor)
is
use Ada.Text_IO;
begin
for I in Token_ID'First .. Descriptor.Last_Nonterminal loop
Put_Line (Token_ID'Image (I) & " => " & Descriptor.Image (I).all);
end loop;
end Put_Tokens;
function Find_ID (Descriptor : in WisiToken.Descriptor; Name : in String) return Token_ID
is begin
for I in Descriptor.Image'Range loop
if Descriptor.Image (I).all = Name then
return I;
end if;
end loop;
raise SAL.Programmer_Error with "token name '" & Name & "' not found in descriptor.image";
end Find_ID;
procedure To_Vector (Item : in Token_ID_Array; Vector : in out Token_ID_Arrays.Vector)
is
J : Integer := Vector.First_Index;
begin
for ID of Item loop
Vector.Replace_Element (J, ID);
J := J + 1;
end loop;
end To_Vector;
function To_Vector (Item : in Token_ID_Array) return Token_ID_Arrays.Vector
is begin
return Result : Token_ID_Arrays.Vector do
Result.Set_First_Last (Item'First, Item'Last);
for I in Item'Range loop
Result (I) := Item (I);
end loop;
end return;
end To_Vector;
function To_Array (Item : in Token_ID_Arrays.Vector) return Token_ID_Array
is begin
return Result : Token_ID_Array (Item.First_Index .. Item.Last_Index) do
for I in Result'Range loop
Result (I) := Item (I);
end loop;
end return;
end To_Array;
function Shared_Prefix (A, B : in Token_ID_Arrays.Vector) return Natural
is
use all type Ada.Containers.Count_Type;
I : Natural := A.First_Index;
J : Natural := B.First_Index;
begin
if A.Length = 0 or B.Length = 0 then
return 0;
end if;
loop
exit when A (I) /= B (I) or I = A.Last_Index or J = B.Last_Index;
I := I + 1;
J := J + 1;
end loop;
return I - 1;
end Shared_Prefix;
function "&" (Left : in Token_ID_Set; Right : in Token_ID) return Token_ID_Set
is begin
return Result : Token_ID_Set := Left do
Result (Right) := True;
end return;
end "&";
function To_Token_ID_Set (First, Last : in Token_ID; Item : in Token_ID_Array) return Token_ID_Set
is begin
return Result : Token_ID_Set := (First .. Last => False)
do
for ID of Item loop
Result (ID) := True;
end loop;
end return;
end To_Token_ID_Set;
procedure To_Set (Item : in Token_ID_Arrays.Vector; Set : out Token_ID_Set)
is begin
for ID of Item loop
Set (ID) := True;
end loop;
end To_Set;
function To_Array (Item : in Token_ID_Set) return Token_ID_Arrays.Vector
is begin
return Result : Token_ID_Arrays.Vector do
for ID in Item'Range loop
if Item (ID) then
Result.Append (ID);
end if;
end loop;
end return;
end To_Array;
function Any (Item : in Token_ID_Set) return Boolean
is begin
for I in Item'Range loop
if Item (I) then
return True;
end if;
end loop;
return False;
end Any;
function Count (Item : in Token_ID_Set) return Integer
is
Result : Integer := 0;
begin
for I in Item'Range loop
if Item (I) then
Result := Result + 1;
end if;
end loop;
return Result;
end Count;
function Image
(Item : in Token_ID_Set;
Desc : in Descriptor;
Max_Count : in Integer := Integer'Last;
Inverted : in Boolean := False)
return String
is
use Ada.Strings.Unbounded;
Result : Unbounded_String;
Need_Comma : Boolean := False;
Count : Integer := 0;
function Include (Item : in Boolean) return Boolean
is begin
if not Inverted then
return Item;
else
return not Item;
end if;
end Include;
begin
for I in Item'Range loop
if Include (Item (I)) then
if Need_Comma then
Result := Result & ", ";
end if;
Result := Result & Image (I, Desc);
Need_Comma := True;
Count := Count + 1;
if Count = Max_Count then
return To_String (Result);
end if;
end if;
end loop;
return To_String (Result);
end Image;
function Image (Item : in Production_ID) return String
is begin
return '(' & Trimmed_Image (Item.LHS) & ',' & Natural'Image (Item.RHS) & ')';
end Image;
function Image (Item : in Production_ID; Descriptor : in WisiToken.Descriptor) return String
is begin
return Image (Item.LHS, Descriptor) & '_' & Trimmed_Image (Item.RHS);
end Image;
function Trimmed_Image (Item : in Production_ID) return String
is begin
return Trimmed_Image (Item.LHS) & '.' & Trimmed_Image (Item.RHS);
end Trimmed_Image;
function Padded_Image (Item : in Production_ID; Width : in Integer) return String
is
use Ada.Strings.Fixed;
begin
return Result : String (1 .. Width) do
Move (Trimmed_Image (Item), Result, Justify => Ada.Strings.Right);
end return;
end Padded_Image;
function To_Vector (Item : in Production_ID_Array) return Production_ID_Arrays.Vector
is begin
return Result : Production_ID_Arrays.Vector do
for I of Item loop
Result.Append (I);
end loop;
end return;
end To_Vector;
function Slice (Item : in Token_Array_Token_Set; I : in Token_ID) return Token_ID_Set
is
Result : Token_ID_Set := (Item'First (2) .. Item'Last (2) => False);
begin
for J in Result'Range loop
Result (J) := Item (I, J);
end loop;
return Result;
end Slice;
function Any (Item : in Token_Array_Token_Set; I : in Token_ID) return Boolean
is begin
for J in Item'Range (2) loop
if Item (I, J) then
return True;
end if;
end loop;
return False;
end Any;
function Any (Item : in Token_Array_Token_Set) return Boolean
is begin
for I in Item'Range (1) loop
for J in Item'Range (2) loop
if Item (I, J) then
return True;
end if;
end loop;
end loop;
return False;
end Any;
procedure Or_Slice (Item : in out Token_Array_Token_Set; I : in Token_ID; Value : in Token_ID_Set)
is begin
for J in Item'Range (2) loop
Item (I, J) := Item (I, J) or Value (J);
end loop;
end Or_Slice;
procedure Put (Descriptor : in WisiToken.Descriptor; Item : in Token_Array_Token_Set)
is
use Ada.Text_IO;
Paren_Done : Boolean := False;
begin
if not Any (Item) then
Put_Line ("(others => (others => False))");
else
Put ("(");
for I in Item'Range (1) loop
if Any (Item, I) then
Put_Line (" " & Image (I, Descriptor) & " =>");
Put (" (");
Paren_Done := False;
for J in Item'Range (2) loop
if Item (I, J) then
if Paren_Done then
Put_Line (" |");
Put (" " & Image (J, Descriptor));
else
Paren_Done := True;
Put (Image (J, Descriptor));
end if;
end if;
end loop;
if Paren_Done then
Put_Line (" => True,");
Put_Line (" others => False)");
else
Put_Line (" others => False),");
end if;
end if;
end loop;
Put_Line ((if Paren_Done then " " else "") & "others => (others => False))");
end if;
end Put;
procedure Report_Memory (Trace : in out WisiToken.Trace'Class; Prefix : in Boolean)
is
use GNATCOLL.Memory;
Memory_Use : constant Watermark_Info := Get_Ada_Allocations;
procedure Trace_Put_Line (S : in String)
is begin
Trace.Put (S, Prefix);
Trace.New_Line;
end Trace_Put_Line;
procedure Trace_Put (S : in String)
is begin
Trace.Put (S, Prefix);
end Trace_Put;
procedure Trace_Dump is new Redirectable_Dump
(Put_Line => Trace_Put_Line,
Put => Trace_Put);
begin
if WisiToken.Trace_Memory > 1 then
Trace_Dump (4 * Trace_Memory, Report => Memory_Usage);
end if;
Trace.Put
("(message ""memory: high" &
Byte_Count'Image (Memory_Use.High) &
" current" &
Byte_Count'Image (Memory_Use.Current - Memory_Baseline) & """)",
Prefix => False);
Trace.New_Line;
end Report_Memory;
function Image (Item : in Buffer_Region) return String
is begin
return "(" & Trimmed_Image (Item.First) & " ." & Base_Buffer_Pos'Image (Item.Last) & ")";
end Image;
function "and" (Left, Right : in Buffer_Region) return Buffer_Region
is begin
return (Buffer_Pos'Min (Left.First, Right.First), Buffer_Pos'Max (Left.Last, Right.Last));
end "and";
function Contains
(Outer, Inner : in Buffer_Region;
First_Boundary : in Boundary := Inclusive;
Last_Boundary : in Boundary := Inclusive)
return Boolean
is
Result : Boolean;
begin
case First_Boundary is
when Inclusive =>
Result := Outer.First <= Inner.First;
when Exclusive =>
Result := Outer.First < Inner.First;
end case;
case Last_Boundary is
when Inclusive =>
Result := @ and Outer.Last >= Inner.Last;
when Exclusive =>
Result := @ and Outer.Last > Inner.Last;
end case;
return Result;
end Contains;
function Overlaps (A, B : in Buffer_Region) return Boolean
is begin
if Length (A) > 0 and Length (B) > 0 then
return Contains (B, A.First) or Contains (B, A.Last) or Contains (A, B.First) or Contains (A, B.Last);
else
return False;
end if;
end Overlaps;
function Trimmed_Image (Item : in Base_Line_Number_Type) return String
is
function Base_Trimmed_Image is new SAL.Gen_Trimmed_Image (Line_Number_Type);
begin
if Item = Invalid_Line_Number then
return "-";
else
return Base_Trimmed_Image (Item);
end if;
end Trimmed_Image;
function Image (Item : in Line_Region) return String
is begin
return "(" & Trimmed_Image (Item.First) & "," & Item.Last'Image & ")";
end Image;
function "+" (Left : in Line_Region; Right : in Base_Line_Number_Type) return Line_Region
is begin
return (Left.First + Right, Left.Last + Right);
end "+";
procedure Enable_Trace (Config : in String)
is
use Ada.Characters.Handling;
use Ada.Strings.Fixed;
Name_First : Integer := Config'First;
Name_Last : Integer;
Value_First : Integer;
Value_Last : Integer;
begin
loop
Name_Last := Index (Config, "=", Name_First);
exit when Name_Last = 0;
Value_First := Name_Last + 1;
Name_Last := Name_Last - 1;
Value_Last := Index (Config, " ", Value_First);
if Value_Last = 0 then
Value_Last := Config'Last;
end if;
declare
Name : constant String := To_Lower (Config (Name_First .. Name_Last));
function Get_Value return Integer
is begin
return Integer'Value (Config (Value_First .. Value_Last));
exception
when Constraint_Error =>
raise User_Error with "expecting integer trace value, found '" &
Config (Value_First .. Value_Last) & "'";
end Get_Value;
Value : constant Integer := Get_Value;
begin
-- Trace var alphabetical order. When modify this, also modify
-- Enable_Trace_Help.
if Name = "debug" then
Debug_Mode := Value > 0;
elsif Name = "action" then
Trace_Action := Value;
elsif Name = "conflicts" or Name = "generate_conflicts" then
Trace_Generate_Conflicts := Value;
elsif Name = "ebnf" or Name = "generate_ebnf" then
Trace_Generate_EBNF := Value;
elsif Name = "generate" then
Trace_Generate := Value;
elsif Name = "minimal_complete" or Name = "generate_minimal_complete" then
Trace_Generate_Minimal_Complete := Value;
elsif Name = "table" or Name = "generate_table" then
Trace_Generate_Table := Value;
elsif Name = "incremental" or Name = "incremental_parse" then
Trace_Incremental_Parse := Value;
elsif Name = "lexer" then
Trace_Lexer := Value;
elsif Name = "mckenzie" then
Trace_McKenzie := Value;
elsif Name = "memory" then
Trace_Memory := Value;
elsif Name = "parse" then
Trace_Parse := Value;
elsif Name = "tests" or Name = "test" then
Trace_Tests := Value;
elsif Name = "time" then
Trace_Time := Value > 0;
else
raise User_Error with "expecting trace name, found '" & Config (Name_First .. Name_Last) & "'";
end if;
end;
Name_First := Value_Last + 1;
exit when Name_First > Config'Last;
end loop;
end Enable_Trace;
procedure Enable_Trace_Help
is
use Ada.Text_IO;
begin
Put_Line (Current_Error, "debug=0|1 - show stack trace on exception, other debug settings");
Put_Line (Current_Error, "action=n - verbosity during parse actions");
Put_Line (Current_Error, "ebnf=n generate_ebnf=n - verbosity during translate EBNF to BNF");
Put_Line (Current_Error, "generate=n - top level verbosity during grammar generation");
Put_Line (Current_Error, "minimal_complete=n generate_minimal_complete=n - verbosity during minimal_complete");
Put_Line (Current_Error, "table=n generate_table=n - verbosity during generate parse table");
Put_Line (Current_Error, "incremental=n incremental_parse=n - verbosity during edit_tree");
Put_Line (Current_Error, "lexer=n - verbosity during lexing");
Put_Line (Current_Error, "mckenzie=n - verbosity during error recover");
Put_Line (Current_Error, "parse=n - verbosity during parsing");
Put_Line (Current_Error, "test=n - verbosity during unit tests");
Put_Line (Current_Error, "time=n - output times of various operations");
end Enable_Trace_Help;
procedure Put
(Lists : in Precedence_Lists_Arrays.Vector;
Map : in Precedence_Maps.Map)
is
use Ada.Text_IO;
use Precedence_Maps;
begin
Put_Line ("Precedence_IDs:");
for Cur in Map.Iterate loop
Put_Line (Element (Cur)'Image & ": " & Key (Cur));
end loop;
Put_Line ("Precedence relations:");
for List of Lists loop
for P of List loop
Put (P'Image & " ");
end loop;
New_Line;
end loop;
end Put;
function Compare
(Left : in Precedence_ID;
Right : in Precedence_ID;
Precedences : in Precedence_Lists_Arrays.Vector)
return Precedence_Compare_Result
is
begin
if Left = Right then
return None;
end if;
for List of Precedences loop
declare
I : Integer := 0;
Left_Index : Integer := 0;
Right_Index : Integer := 0;
begin
for Prec of List loop
I := @ + 1;
if Left = Prec then
Left_Index := I;
end if;
if Right = Prec then
Right_Index := I;
end if;
end loop;
if Left_Index /= 0 and Right_Index /= 0 then
if Left_Index < Right_Index then
return WisiToken.Left;
elsif Left_Index > Right_Index then
return WisiToken.Right;
else
return WisiToken.None;
end if;
end if;
end;
end loop;
return None;
end Compare;
function Error_Message
(File_Name : in String;
Line : in Base_Line_Number_Type;
Column : in Ada.Text_IO.Count;
Message : in String)
return String
is
use all type Ada.Text_IO.Count;
begin
return File_Name & ":" &
Trimmed_Image (if Line = Invalid_Line_Number then Integer'(0) else Integer (Line)) & ":" &
Trimmed_Image (Integer (Column + 1)) & ": " &
Message;
end Error_Message;
function Next_Value
(Stream : not null access Ada.Streams.Root_Stream_Type'Class;
Delims : in Ada.Strings.Maps.Character_Set)
return String
is
use Ada.Strings.Unbounded;
Result : Unbounded_String;
Char : Character;
begin
loop
Character'Read (Stream, Char);
exit when not Ada.Strings.Maps.Is_In (Char, Delims);
end loop;
Append (Result, Char);
loop
Character'Read (Stream, Char);
if Ada.Strings.Maps.Is_In (Char, Delims) then
return To_String (Result);
else
Append (Result, Char);
end if;
end loop;
exception
when Ada.Streams.Stream_IO.End_Error =>
return To_String (Result);
end Next_Value;
end WisiToken;
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