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------------------------------------------------------------------------------
-- --
-- ASIS UTILITY LIBRARY COMPONENTS --
-- --
-- A S I S _ U L . S T R I N G S --
-- --
-- B o d y --
-- --
-- Copyright (C) 2004-2007, AdaCore --
-- --
-- Asis Utility Library (ASIS UL) 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 2, or (at your --
-- option) any later version. ASIS UL 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 GNAT; see file --
-- COPYING. If not, write to the Free Software Foundation, 51 Franklin --
-- Street, Fifth Floor, Boston, MA 02110-1301, USA. --
-- --
-- ASIS UL is maintained by AdaCore (http://www.adacore.com). --
-- --
------------------------------------------------------------------------------
with Table;
with Asis.Set_Get; use Asis.Set_Get;
with Atree; use Atree;
with Namet; use Namet;
with Sinput; use Sinput;
with Types; use Types;
package body ASIS_UL.Strings is
package Chars is new Table.Table (
Table_Component_Type => Character,
Table_Index_Type => Integer,
Table_Low_Bound => 1,
Table_Initial => 10000,
Table_Increment => 1000,
Table_Name => "character container");
Table : Chars.Table_Ptr renames Chars.Table;
-------------------------
-- Build_GNAT_Location --
-------------------------
function Build_GNAT_Location
(For_Elem : Asis.Element;
Line : Natural := 0;
Column : Natural := 0)
return String_Loc
is
S : String_Loc := Nil_String_Loc;
First : constant Natural := Chars.Last + 1;
P : Source_Ptr;
Sindex : Source_File_Index;
Instance_Depth : Natural := 0;
function Strip_Space (S : String) return String;
-- Is applied to the result of 'Img attribute. Cuts out the leading
-- space.
function Strip_Space (S : String) return String is
First_Idx : constant Positive := S'First + 1;
Result : constant String := S (First_Idx .. S'Last);
begin
return Result;
end Strip_Space;
procedure Enter_Sloc
(Line : Natural := 0;
Column : Natural := 0);
-- For the current value of P, sets in the string table the string
-- of the form file_name:line_number. Also computes Sindex as the
-- Id of the sourse file of P. If Line and Column are equal to zero,
-- computes line and column number from P.
procedure Enter_Sloc
(Line : Natural := 0;
Column : Natural := 0)
is
F_Name : File_Name_Type;
begin
Sindex := Get_Source_File_Index (P);
F_Name := File_Name (Sindex);
Get_Name_String (F_Name);
S := Enter_String (Name_Buffer (1 .. Name_Len) & ":");
if Line = 0 then
S := Enter_String (Strip_Space (Get_Physical_Line_Number (P)'Img));
else
S := Enter_String (Strip_Space (Line'Img));
end if;
S := Enter_String (":");
if Column = 0 then
S := Enter_String (Strip_Space (Get_Column_Number (P)'Img));
else
S := Enter_String (Strip_Space (Column'Img));
end if;
end Enter_Sloc;
begin
-- The implementation is adopted from
-- Gnatelim.Asis_Utilities.Build_Sloc_Trace
P := Sloc (Node (For_Elem));
Enter_Sloc (Line, Column);
P := Instantiation (Sindex);
while P /= No_Location loop
pragma Assert (Line = 0 and then Column = 0);
S := Enter_String ("[");
Instance_Depth := Instance_Depth + 1;
Enter_Sloc;
P := Instantiation (Sindex);
end loop;
for J in 1 .. Instance_Depth loop
S := Enter_String ("]");
end loop;
S.First := First;
S.Last := Chars.Last;
return S;
end Build_GNAT_Location;
function Build_GNAT_Location
(For_Elem : Asis.Element;
Line : Natural := 0;
Column : Natural := 0)
return String
is
Last_Backup : constant Integer := Chars.Last;
Res_Sloc : constant String_Loc :=
Build_GNAT_Location (For_Elem, Line, Column);
begin
declare
Result : constant String := Get_String (Res_Sloc);
begin
Chars.Set_Last (Last_Backup);
return Result;
end;
end Build_GNAT_Location;
------------------
-- Enter_String --
------------------
function Enter_String (S : String) return String_Loc is
Len : constant Integer := S'Length;
F : Integer;
begin
if Len = 0 then
return Nil_String_Loc;
else
Chars.Increment_Last;
F := Chars.Last;
Chars.Set_Last (F + Len - 1);
Table (F .. F + Len - 1) := Chars.Table_Type (S);
return (F, F + Len - 1);
end if;
end Enter_String;
----------------
-- Get_String --
----------------
function Get_String (SL : String_Loc) return String is
begin
if SL = Nil_String_Loc then
return "";
else
return String (Table (SL.First .. SL.Last));
end if;
end Get_String;
----------
-- Init --
----------
procedure Init is
begin
Chars.Init;
end Init;
--------------
-- Is_Equal --
--------------
function Is_Equal (S : String; SL : String_Loc) return Boolean is
Result : Boolean := False;
begin
if SL.First in 1 .. Chars.Last
and then
SL.Last in 1 .. Chars.Last
and then
SL.Last - SL.First + 1 = S'Length
then
Result := S = Get_String (SL);
end if;
return Result;
end Is_Equal;
end ASIS_UL.Strings;
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