-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2005 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, 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 2, or (at your option) any later ver- --
+-- 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. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- Public License distributed with GNAT; see file COPYING3. If not, go to --
+-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
with Atree; use Atree;
with Csets; use Csets;
+with Hostparm; use Hostparm;
with Namet; use Namet;
with Opt; use Opt;
+with Output; use Output;
with Restrict; use Restrict;
with Rident; use Rident;
with Scans; use Scans;
with Sinput; use Sinput;
with Uintp; use Uintp;
+with GNAT.Byte_Order_Mark; use GNAT.Byte_Order_Mark;
+
+with System.WCh_Con; use System.WCh_Con;
+
package body Scn is
use ASCII;
+ Obsolescent_Check_Flag : Boolean := True;
+ -- Obsolescent check activation. Set to False during integrated
+ -- preprocessing.
+
Used_As_Identifier : array (Token_Type) of Boolean;
-- Flags set True if a given keyword is used as an identifier (used to
-- make sure that we only post an error message for incorrect use of a
-- keyword as an identifier once for a given keyword).
procedure Check_End_Of_Line;
- -- Called when end of line encountered. Checks that line is not
- -- too long, and that other style checks for the end of line are met.
+ -- Called when end of line encountered. Checks that line is not too long,
+ -- and that other style checks for the end of line are met.
function Determine_License return License_Type;
-- Scan header of file and check that it has an appropriate GNAT-style
procedure Error_Long_Line;
-- Signal error of excessively long line
- ---------------
- -- Post_Scan --
- ---------------
-
- procedure Post_Scan is
- begin
- case Token is
- when Tok_Char_Literal =>
- Token_Node := New_Node (N_Character_Literal, Token_Ptr);
- Set_Char_Literal_Value (Token_Node, UI_From_CC (Character_Code));
- Set_Chars (Token_Node, Token_Name);
-
- when Tok_Identifier =>
- Token_Node := New_Node (N_Identifier, Token_Ptr);
- Set_Chars (Token_Node, Token_Name);
-
- when Tok_Real_Literal =>
- Token_Node := New_Node (N_Real_Literal, Token_Ptr);
- Set_Realval (Token_Node, Real_Literal_Value);
-
- when Tok_Integer_Literal =>
- Token_Node := New_Node (N_Integer_Literal, Token_Ptr);
- Set_Intval (Token_Node, Int_Literal_Value);
-
- when Tok_String_Literal =>
- Token_Node := New_Node (N_String_Literal, Token_Ptr);
- Set_Has_Wide_Character (Token_Node, Wide_Character_Found);
- Set_Strval (Token_Node, String_Literal_Id);
-
- when Tok_Operator_Symbol =>
- Token_Node := New_Node (N_Operator_Symbol, Token_Ptr);
- Set_Chars (Token_Node, Token_Name);
- Set_Strval (Token_Node, String_Literal_Id);
-
- when others =>
- null;
- end case;
- end Post_Scan;
-
-----------------------
-- Check_End_Of_Line --
-----------------------
begin
if Style_Check then
Style.Check_Line_Terminator (Len);
- elsif Len > Opt.Max_Line_Length then
+ elsif Len > Max_Line_Length then
Error_Long_Line;
end if;
end Check_End_Of_Line;
begin
Error_Msg
("this line is too long",
- Current_Line_Start + Source_Ptr (Opt.Max_Line_Length));
+ Current_Line_Start + Source_Ptr (Max_Line_Length));
end Error_Long_Line;
------------------------
GNAT_Hedr : constant Text_Buffer (1 .. 78) := (others => '-');
begin
- Scanner.Initialize_Scanner (Unit, Index);
+ Scanner.Initialize_Scanner (Index);
+
+ if Index /= Internal_Source_File then
+ Set_Unit (Index, Unit);
+ end if;
+
+ Current_Source_Unit := Unit;
-- Set default for Comes_From_Source (except if we are going to process
-- an artificial string internally created within the compiler and
Set_License (Current_Source_File, Determine_License);
end if;
+ -- Check for BOM
+
+ declare
+ BOM : BOM_Kind;
+ Len : Natural;
+ Tst : String (1 .. 5);
+
+ begin
+ for J in 1 .. 5 loop
+ Tst (J) := Source (Scan_Ptr + Source_Ptr (J) - 1);
+ end loop;
+
+ Read_BOM (Tst, Len, BOM, False);
+
+ case BOM is
+ when UTF8_All =>
+ Scan_Ptr := Scan_Ptr + Source_Ptr (Len);
+ Wide_Character_Encoding_Method := WCEM_UTF8;
+ Upper_Half_Encoding := True;
+
+ when UTF16_LE | UTF16_BE =>
+ Set_Standard_Error;
+ Write_Line ("UTF-16 encoding format not recognized");
+ Set_Standard_Output;
+ raise Unrecoverable_Error;
+
+ when UTF32_LE | UTF32_BE =>
+ Set_Standard_Error;
+ Write_Line ("UTF-32 encoding format not recognized");
+ Set_Standard_Output;
+ raise Unrecoverable_Error;
+
+ when Unknown =>
+ null;
+
+ when others =>
+ raise Program_Error;
+ end case;
+ end;
+
-- Because of the License stuff above, Scng.Initialize_Scanner cannot
-- call Scan. Scan initial token (note this initializes Prev_Token,
-- Prev_Token_Ptr).
Scan;
end if;
- -- Clear flags for reserved words used as indentifiers
+ -- Clear flags for reserved words used as identifiers
for J in Token_Type loop
Used_As_Identifier (J) := False;
procedure Obsolescent_Check (S : Source_Ptr) is
begin
- -- This is a pain in the neck case, since we normally need a node to
- -- call Check_Restrictions, and all we have is a source pointer. The
- -- easiest thing is to construct a dummy node. A bit kludgy, but this
- -- is a marginal case. It's not worth trying to do things more cleanly.
-
- Check_Restriction (No_Obsolescent_Features, New_Node (N_Empty, S));
+ if Obsolescent_Check_Flag then
+ -- This is a pain in the neck case, since we normally need a node to
+ -- call Check_Restrictions, and all we have is a source pointer. The
+ -- easiest thing is to construct a dummy node. A bit kludgy, but this
+ -- is a marginal case. It's not worth trying to do things more
+ -- cleanly.
+
+ Check_Restriction (No_Obsolescent_Features, New_Node (N_Empty, S));
+ end if;
end Obsolescent_Check;
+ ---------------
+ -- Post_Scan --
+ ---------------
+
+ procedure Post_Scan is
+ begin
+ case Token is
+ when Tok_Char_Literal =>
+ Token_Node := New_Node (N_Character_Literal, Token_Ptr);
+ Set_Char_Literal_Value (Token_Node, UI_From_CC (Character_Code));
+ Set_Chars (Token_Node, Token_Name);
+
+ when Tok_Identifier =>
+ Token_Node := New_Node (N_Identifier, Token_Ptr);
+ Set_Chars (Token_Node, Token_Name);
+
+ when Tok_Real_Literal =>
+ Token_Node := New_Node (N_Real_Literal, Token_Ptr);
+ Set_Realval (Token_Node, Real_Literal_Value);
+
+ when Tok_Integer_Literal =>
+ Token_Node := New_Node (N_Integer_Literal, Token_Ptr);
+ Set_Intval (Token_Node, Int_Literal_Value);
+
+ when Tok_String_Literal =>
+ Token_Node := New_Node (N_String_Literal, Token_Ptr);
+ Set_Has_Wide_Character
+ (Token_Node, Wide_Character_Found);
+ Set_Has_Wide_Wide_Character
+ (Token_Node, Wide_Wide_Character_Found);
+ Set_Strval (Token_Node, String_Literal_Id);
+
+ when Tok_Operator_Symbol =>
+ Token_Node := New_Node (N_Operator_Symbol, Token_Ptr);
+ Set_Chars (Token_Node, Token_Name);
+ Set_Strval (Token_Node, String_Literal_Id);
+
+ when others =>
+ null;
+ end case;
+ end Post_Scan;
+
------------------------------
-- Scan_Reserved_Identifier --
------------------------------
Set_Chars (Token_Node, Token_Name);
end Scan_Reserved_Identifier;
+ ---------------------------
+ -- Set_Obsolescent_Check --
+ ---------------------------
+
+ procedure Set_Obsolescent_Check (Value : Boolean) is
+ begin
+ Obsolescent_Check_Flag := Value;
+ end Set_Obsolescent_Check;
+
end Scn;
OSDN Git Service
