/usr/share/ada/adainclude/gpr/gpr-sinput.adb is in libgpr1-dev 2017-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- --
-- GPR PROJECT MANAGER --
-- --
-- Copyright (C) 1992-2015, Free Software Foundation, Inc. --
-- --
-- This library is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 3, or (at your option) any later --
-- version. This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- --
-- --
-- --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
------------------------------------------------------------------------------
with Ada.Unchecked_Deallocation;
with Ada.Unchecked_Conversion;
with GNAT.Byte_Order_Mark; use GNAT.Byte_Order_Mark;
with System; use System;
pragma Warnings (Off);
with System.WCh_Con; use System.WCh_Con;
with System.WCh_Cnv; use System.WCh_Cnv;
with System.Memory;
pragma Warnings (On);
with GPR.Err;
with GPR.Erroutc; use GPR.Erroutc;
with GPR.Names; use GPR.Names;
with GPR.Opt; use GPR.Opt;
with GPR.Output; use GPR.Output;
package body GPR.Sinput is
Lines_Initial : constant := 500;
First : Boolean := True;
-- Flag used when Load_File is called the first time, to set
-- Main_Source_File.
-- The flag is reset to False at the first call to Load_Project_File.
-- Calling Reset_First sets it back to True.
procedure Free is new Ada.Unchecked_Deallocation
(Lines_Table_Type, Lines_Table_Ptr);
---------------------------
-- Add_Line_Tables_Entry --
---------------------------
procedure Add_Line_Tables_Entry
(S : in out Source_File_Record;
P : Source_Ptr)
is
LL : Line_Number;
begin
-- Reallocate the lines tables if necessary
if S.Last_Source_Line = S.Lines_Table'Last then
declare
New_Table : constant Lines_Table_Ptr :=
new Lines_Table_Type (1 .. S.Last_Source_Line * 2);
begin
New_Table (1 .. S.Last_Source_Line) :=
S.Lines_Table (1 .. S.Last_Source_Line);
Free (S.Lines_Table);
S.Lines_Table := New_Table;
end;
end if;
S.Last_Source_Line := S.Last_Source_Line + 1;
LL := S.Last_Source_Line;
S.Lines_Table (LL) := P;
end Add_Line_Tables_Entry;
-------------------
-- Check_For_BOM --
-------------------
procedure Check_For_BOM is
BOM : BOM_Kind;
Len : Natural;
Tst : String (1 .. 5);
C : Character;
begin
for J in 1 .. 5 loop
C := Source (Scan_Ptr + Source_Ptr (J) - 1);
-- Definitely no BOM if EOF character marks either end of file, or
-- an illegal non-BOM character if not at the end of file.
if C = EOF then
return;
end if;
Tst (J) := C;
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");
raise Unrecoverable_Error;
when UTF32_LE | UTF32_BE =>
Set_Standard_Error;
Write_Line ("UTF-32 encoding format not recognized");
raise Unrecoverable_Error;
when Unknown =>
null;
when others =>
raise Program_Error;
end case;
end Check_For_BOM;
-----------------------------
-- Clear_Source_File_Table --
-----------------------------
procedure Clear_Source_File_Table is
begin
for X in 1 .. Source_File.Last loop
declare
S : Source_File_Record renames Source_File.Table (X);
Lo : constant Source_Ptr := S.Source_First;
Hi : constant Source_Ptr := S.Source_Last;
subtype Actual_Source_Buffer is Source_Buffer (Lo .. Hi);
-- Physical buffer allocated
type Actual_Source_Ptr is access Actual_Source_Buffer;
-- This is the pointer type for the physical buffer allocated
procedure Free is new Ada.Unchecked_Deallocation
(Actual_Source_Buffer, Actual_Source_Ptr);
pragma Suppress (All_Checks);
pragma Warnings (Off);
-- The following unchecked conversion is aliased safe, since it
-- is not used to create improperly aliased pointer values.
function To_Actual_Source_Ptr is new
Ada.Unchecked_Conversion (Address, Actual_Source_Ptr);
pragma Warnings (On);
Actual_Ptr : Actual_Source_Ptr :=
To_Actual_Source_Ptr (S.Source_Text (Lo)'Address);
begin
Free (Actual_Ptr);
Free (S.Lines_Table);
end;
end loop;
Source_File.Free;
Sinput.Initialize;
end Clear_Source_File_Table;
--------------------
-- Full_File_Name --
--------------------
function Full_File_Name (S : Source_File_Index) return File_Name_Type is
begin
return Source_File.Table (S).Full_File_Name;
end Full_File_Name;
-------------------
-- Full_Ref_Name --
-------------------
function Full_Ref_Name (S : Source_File_Index) return File_Name_Type is
begin
return Source_File.Table (S).Full_Ref_Name;
end Full_Ref_Name;
-----------------------
-- Get_Column_Number --
-----------------------
function Get_Column_Number (P : Source_Ptr) return Column_Number is
S : Source_Ptr;
C : Column_Number;
Sindex : Source_File_Index;
Src : Source_Buffer_Ptr;
begin
-- If the input source pointer is not a meaningful value then return
-- at once with column number 1. This can happen for a file not found
-- condition for a file loaded indirectly by RTE, and also perhaps on
-- some unknown internal error conditions. In either case we certainly
-- don't want to blow up.
if P < 1 then
return 1;
else
Sindex := Get_Source_File_Index (P);
Src := Source_File.Table (Sindex).Source_Text;
S := Line_Start (P);
C := 1;
while S < P loop
if Src (S) = ASCII.HT then
C := (C - 1) / 8 * 8 + (8 + 1);
S := S + 1;
-- Deal with wide character case, but don't include brackets
-- notation in this circuit, since we know that this will
-- display unencoded (no one encodes brackets notation).
elsif Src (S) /= '[' and then Is_Start_Of_Wide_Char (Src, S) then
C := C + 1;
Skip_Wide (Src, S);
-- Normal (non-wide) character case or brackets sequence
else
C := C + 1;
S := S + 1;
end if;
end loop;
return C;
end if;
end Get_Column_Number;
---------------------
-- Get_Line_Number --
---------------------
function Get_Line_Number
(P : Source_Ptr) return Line_Number
is
Sfile : Source_File_Index;
Table : Lines_Table_Ptr;
Lo : Line_Number;
Hi : Line_Number;
Mid : Line_Number;
Loc : Source_Ptr;
begin
-- If the input source pointer is not a meaningful value then return
-- at once with line number 1. This can happen for a file not found
-- condition for a file loaded indirectly by RTE, and also perhaps on
-- some unknown internal error conditions. In either case we certainly
-- don't want to blow up.
if P < 1 then
return 1;
-- Otherwise we can do the binary search
else
Sfile := Get_Source_File_Index (P);
Loc := P;
Table := Source_File.Table (Sfile).Lines_Table;
Lo := 1;
Hi := Source_File.Table (Sfile).Last_Source_Line;
loop
Mid := (Lo + Hi) / 2;
if Loc < Table (Mid) then
Hi := Mid - 1;
else -- Loc >= Table (Mid)
if Mid = Hi or else
Loc < Table (Mid + 1)
then
return Mid;
else
Lo := Mid + 1;
end if;
end if;
end loop;
end if;
end Get_Line_Number;
---------------------------
-- Get_Source_File_Index --
---------------------------
function Get_Source_File_Index (S : Source_Ptr) return Source_File_Index is
begin
return Source_File_Index_Table (Int (S) / Source_Align);
end Get_Source_File_Index;
----------------
-- Initialize --
----------------
procedure Initialize is
begin
Source_File.Init;
end Initialize;
----------------------
-- Last_Source_File --
----------------------
function Last_Source_File return Source_File_Index is
begin
return Source_File.Last;
end Last_Source_File;
----------------
-- Line_Start --
----------------
function Line_Start (P : Source_Ptr) return Source_Ptr is
Sindex : constant Source_File_Index := Get_Source_File_Index (P);
Src : constant Source_Buffer_Ptr :=
Source_File.Table (Sindex).Source_Text;
Sfirst : constant Source_Ptr :=
Source_File.Table (Sindex).Source_First;
S : Source_Ptr;
begin
S := P;
while S > Sfirst
and then Src (S - 1) /= ASCII.CR
and then Src (S - 1) /= ASCII.LF
loop
S := S - 1;
end loop;
return S;
end Line_Start;
function Line_Start
(L : Line_Number;
S : Source_File_Index) return Source_Ptr
is
begin
return Source_File.Table (S).Lines_Table (L);
end Line_Start;
---------------
-- Load_File --
---------------
function Load_File (Path : String) return Source_File_Index is
Src : Source_Buffer_Ptr;
X : Source_File_Index;
Lo : Source_Ptr;
Hi : Source_Ptr;
Source_File_FD : File_Descriptor;
-- The file descriptor for the current source file. A negative value
-- indicates failure to open the specified source file.
Len : Integer;
-- Length of file (assume no more than 2 gigabytes of source)
Actual_Len : Integer;
Path_Id : File_Name_Type;
File_Id : File_Name_Type;
begin
if Path = "" then
return No_Source_File;
end if;
Source_File.Increment_Last;
X := Source_File.Last;
if X = Source_File.First then
Lo := First_Source_Ptr;
else
Lo := ((Source_File.Table (X - 1).Source_Last + Source_Align) /
Source_Align) * Source_Align;
end if;
Name_Len := Path'Length;
Name_Buffer (1 .. Name_Len) := Path;
Path_Id := Name_Find;
Name_Buffer (Name_Len + 1) := ASCII.NUL;
-- Open the source FD, note that we open in binary mode, because as
-- documented in the spec, the caller is expected to handle either
-- DOS or Unix mode files, and there is no point in wasting time on
-- text translation when it is not required.
Source_File_FD := Open_Read (Name_Buffer'Address, Binary);
if Source_File_FD = Invalid_FD then
Source_File.Decrement_Last;
return No_Source_File;
end if;
Len := Integer (File_Length (Source_File_FD));
-- Set Hi so that length is one more than the physical length, allowing
-- for the extra EOF character at the end of the buffer
Hi := Lo + Source_Ptr (Len);
-- Do the actual read operation
declare
subtype Actual_Source_Buffer is Source_Buffer (Lo .. Hi);
-- Physical buffer allocated
type Actual_Source_Ptr is access Actual_Source_Buffer;
-- This is the pointer type for the physical buffer allocated
Actual_Ptr : constant Actual_Source_Ptr := new Actual_Source_Buffer;
-- And this is the actual physical buffer
begin
-- Allocate source buffer, allowing extra character at end for EOF
-- Some systems have file types that require one read per line,
-- so read until we get the Len bytes or until there are no more
-- characters.
Hi := Lo;
loop
Actual_Len := Read (Source_File_FD, Actual_Ptr (Hi)'Address, Len);
Hi := Hi + Source_Ptr (Actual_Len);
exit when Actual_Len = Len or else Actual_Len <= 0;
end loop;
Actual_Ptr (Hi) := EOF;
-- Now we need to work out the proper virtual origin pointer to
-- return. This is exactly Actual_Ptr (0)'Address, but we have to
-- be careful to suppress checks to compute this address.
declare
pragma Suppress (All_Checks);
pragma Warnings (Off);
-- The following unchecked conversion is aliased safe, since it
-- is not used to create improperly aliased pointer values.
function To_Source_Buffer_Ptr is new
Ada.Unchecked_Conversion (Address, Source_Buffer_Ptr);
pragma Warnings (On);
begin
Src := To_Source_Buffer_Ptr (Actual_Ptr (0)'Address);
end;
end;
-- Read is complete, close the file and we are done (no need to test
-- status from close, since we have successfully read the file).
Close (Source_File_FD);
-- Get the file name, without path information
declare
Index : Positive := Path'Last;
begin
while Index > Path'First loop
exit when Path (Index - 1) = '/';
exit when Path (Index - 1) = Directory_Separator;
Index := Index - 1;
end loop;
Name_Len := Path'Last - Index + 1;
Name_Buffer (1 .. Name_Len) := Path (Index .. Path'Last);
File_Id := Name_Find;
end;
declare
S : Source_File_Record renames Source_File.Table (X);
begin
S := (File_Name => File_Id,
Reference_Name => File_Id,
Debug_Source_Name => File_Id,
Full_Debug_Name => Path_Id,
Full_File_Name => Path_Id,
Full_Ref_Name => Path_Id,
Source_Text => Src,
Source_First => Lo,
Source_Last => Hi,
Source_Checksum => 0,
Last_Source_Line => 1,
Time_Stamp => Empty_Time_Stamp,
Lines_Table => null,
Lines_Table_Max => 1);
S.Lines_Table_Max := Lines_Initial;
S.Lines_Table := new Lines_Table_Type (1 .. Lines_Initial);
S.Lines_Table (1) := Lo;
end;
Set_Source_File_Index_Table (X);
if First then
Main_Source_File := X;
First := False;
end if;
return X;
end Load_File;
----------------------
-- Num_Source_Files --
----------------------
function Num_Source_Files return Nat is
begin
return Int (Source_File.Last) - Int (Source_File.First) + 1;
end Num_Source_Files;
----------------------
-- Num_Source_Lines --
----------------------
function Num_Source_Lines (S : Source_File_Index) return Nat is
begin
return Nat (Source_File.Table (S).Last_Source_Line);
end Num_Source_Lines;
--------------------
-- Reference_Name --
--------------------
function Reference_Name (S : Source_File_Index) return File_Name_Type is
begin
return Source_File.Table (S).Reference_Name;
end Reference_Name;
-----------------
-- Reset_First --
-----------------
procedure Reset_First is
begin
First := True;
end Reset_First;
--------------------------------
-- Restore_Project_Scan_State --
--------------------------------
procedure Restore_Project_Scan_State
(Saved_State : Saved_Project_Scan_State)
is
begin
Restore_Scan_State (Saved_State.Scan_State);
Source := Saved_State.Source;
Current_Source_File := Saved_State.Current_Source_File;
end Restore_Project_Scan_State;
-----------------------------
-- Save_Project_Scan_State --
-----------------------------
procedure Save_Project_Scan_State
(Saved_State : out Saved_Project_Scan_State)
is
begin
Save_Scan_State (Saved_State.Scan_State);
Saved_State.Source := Source;
Saved_State.Current_Source_File := Current_Source_File;
end Save_Project_Scan_State;
---------------------------------
-- Set_Source_File_Index_Table --
---------------------------------
procedure Set_Source_File_Index_Table (Xnew : Source_File_Index) is
Ind : Int;
SP : Source_Ptr;
SL : constant Source_Ptr := Source_File.Table (Xnew).Source_Last;
begin
SP := Source_File.Table (Xnew).Source_First;
pragma Assert (SP mod Source_Align = 0);
Ind := Int (SP) / Source_Align;
while SP <= SL loop
Source_File_Index_Table (Ind) := Xnew;
SP := SP + Source_Align;
Ind := Ind + 1;
end loop;
end Set_Source_File_Index_Table;
---------------
-- Skip_Wide --
---------------
procedure Skip_Wide (S : Source_Buffer_Ptr; P : in out Source_Ptr) is
function Skip_Char return Character;
-- Function to skip one character of wide character escape sequence
---------------
-- Skip_Char --
---------------
function Skip_Char return Character is
begin
P := P + 1;
return S (P - 1);
end Skip_Char;
function WC_Skip is new Char_Sequence_To_UTF_32 (Skip_Char);
Discard : UTF_32_Code;
pragma Warnings (Off, Discard);
-- Start of processing for Skip_Wide
begin
Discard := WC_Skip (Skip_Char, Wide_Character_Encoding_Method);
end Skip_Wide;
----------------------------
-- Source_File_Is_Subunit --
----------------------------
function Source_File_Is_Subunit (X : Source_File_Index) return Boolean is
begin
-- Nothing to do if X is no source file, so simply return False
if X = No_Source_File then
return False;
end if;
Err.Scanner.Initialize_Scanner (X, Err.Scanner.Ada);
-- No error for special characters that are used for preprocessing
Err.Scanner.Set_Special_Character ('#');
Err.Scanner.Set_Special_Character ('$');
Check_For_BOM;
-- We scan past junk to the first interesting compilation unit token, to
-- see if it is SEPARATE. We ignore WITH keywords during this and also
-- PRIVATE. The reason for ignoring PRIVATE is that it handles some
-- error situations, and also to handle PRIVATE WITH in Ada 2005 mode.
while Token = Tok_With
or else Token = Tok_Private
or else (Token not in Token_Class_Cunit and then Token /= Tok_EOF)
loop
Err.Scanner.Scan;
end loop;
Err.Scanner.Reset_Special_Characters;
return Token = Tok_Separate;
end Source_File_Is_Subunit;
------------------
-- Source_First --
------------------
function Source_First (S : Source_File_Index) return Source_Ptr is
begin
return Source_File.Table (S).Source_First;
end Source_First;
-----------------
-- Source_Last --
-----------------
function Source_Last (S : Source_File_Index) return Source_Ptr is
begin
return Source_File.Table (S).Source_Last;
end Source_Last;
-----------------
-- Source_Text --
-----------------
function Source_Text (S : Source_File_Index) return Source_Buffer_Ptr is
begin
return Source_File.Table (S).Source_Text;
end Source_Text;
end GPR.Sinput;
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