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265 | ------------------------------------------------------------------------------
-- --
-- ASIS-for-GNAT IMPLEMENTATION COMPONENTS --
-- --
-- A 4 G . U _ C O N V --
-- --
-- B o d y --
-- --
-- Copyright (c) 1995-2006, Free Software Foundation, Inc. --
-- --
-- ASIS-for-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 --
-- Software Foundation; either version 2, or (at your option) any later --
-- version. ASIS-for-GNAT is distributed in the hope that it will be use- --
-- ful, but WITHOUT ANY WARRANTY; without even the implied warranty of MER- --
-- CHANTABILITY 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 ASIS-for-GNAT; see file --
-- COPYING. If not, write to the Free Software Foundation, 51 Franklin --
-- Street, Fifth Floor, Boston, MA 02110-1301, USA. --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-- ASIS-for-GNAT was originally developed by the ASIS-for-GNAT team at the --
-- Software Engineering Laboratory of the Swiss Federal Institute of --
-- Technology (LGL-EPFL) in Lausanne, Switzerland, in cooperation with the --
-- Scientific Research Computer Center of Moscow State University (SRCC --
-- MSU), Russia, with funding partially provided by grants from the Swiss --
-- National Science Foundation and the Swiss Academy of Engineering --
-- Sciences. ASIS-for-GNAT is now maintained by AdaCore --
-- (http://www.adaccore.com). --
-- --
------------------------------------------------------------------------------
with Ada.Characters.Handling; use Ada.Characters.Handling;
with Namet; use Namet;
with Fname; use Fname;
with Krunch;
with Opt; use Opt;
package body A4G.U_Conv is
---------------------------------
-- Local Types and Subprograms --
---------------------------------
-- We use the trivial finite state automata to analyse and to transform
-- strings passed as parameters to ASIS interfaces and processed by ASIS
-- itself below there are type and routines definitions for various
-- versions of this automata
type State is (Beg_Ident, Mid_Ident, Und_Line);
-- The states of the automata. Some versions may use only a part of the
-- whole set of states.
procedure Normalize_Char (In_Char : Character;
Curr_State : in out State;
Out_Char : out Character;
OK : out Boolean);
-- One step of the finite-state-automata analyzing the string which is
-- supposed to be an Ada unit name and producind the "normalized"
-- version of the name. If In_Char under in the state Curr_State may be
-- considered as belonging to the Ada unit name, the "low-case version"
-- of this character is assigned to Out_Char, and OK is ste True,
-- otherwise OK is set false
function Convert_Char (Ch : Character) return Character;
-- performs upper case -> lover case conversion in the GNAT file
-- name style (see GNAT Document INTRO and Fnames.ads - only letters
-- from the A .. Z range are folded to lower case)
------------------
-- Convert_Char --
------------------
function Convert_Char (Ch : Character) return Character is
begin
if Ch = '.' then
return '-';
else
return To_Lower (Ch);
end if;
end Convert_Char;
------------------------
-- Get_Norm_Unit_Name --
------------------------
procedure Get_Norm_Unit_Name
(U_Name : String;
N_U_Name : out String;
Spec : Boolean;
May_Be_Unit_Name : out Boolean)
is
Current_State : State := Beg_Ident;
begin
May_Be_Unit_Name := False;
for I in U_Name'Range loop
Normalize_Char (U_Name (I), Current_State,
N_U_Name (I), May_Be_Unit_Name);
exit when not May_Be_Unit_Name;
end loop;
if not May_Be_Unit_Name then
return;
elsif N_U_Name (U_Name'Last) = '_' or else
N_U_Name (U_Name'Last) = '.'
then
-- something like "Ab_" -> "ab_" or "Ab_Cd." -> "ab_cd."
May_Be_Unit_Name := False;
return;
end if;
-- here we have all the content of U_Name parced and
-- May_Be_Unit_Name is True. All we have to do is to append
-- the "%s" or "%b" suffix
N_U_Name (N_U_Name'Last - 1) := '%';
if Spec then
N_U_Name (N_U_Name'Last) := 's';
else
N_U_Name (N_U_Name'Last) := 'b';
end if;
end Get_Norm_Unit_Name;
-----------------------------
-- Is_Predefined_File_Name --
-----------------------------
function Is_Predefined_File_Name (S : String_Access) return Boolean is
begin
Namet.Name_Len := S'Length - 1;
-- "- 1" is for trailing ASCII.NUL in the file name
Namet.Name_Buffer (1 .. Namet.Name_Len) := To_String (S);
return Fname.Is_Predefined_File_Name (Namet.Name_Enter);
end Is_Predefined_File_Name;
--------------------
-- Normalize_Char --
--------------------
procedure Normalize_Char
(In_Char : Character;
Curr_State : in out State;
Out_Char : out Character;
OK : out Boolean)
is
begin
OK := True;
case Curr_State is
when Beg_Ident =>
if Is_Letter (In_Char) then
Curr_State := Mid_Ident;
else
OK := False;
end if;
when Mid_Ident =>
if Is_Letter (In_Char) or else
Is_Digit (In_Char)
then
null;
elsif In_Char = '_' then
Curr_State := Und_Line;
elsif In_Char = '.' then
Curr_State := Beg_Ident;
else
OK := False;
end if;
when Und_Line =>
if Is_Letter (In_Char) or else
Is_Digit (In_Char)
then
Curr_State := Mid_Ident;
else
OK := False;
end if;
end case;
Out_Char := To_Lower (In_Char);
end Normalize_Char;
---------------------------
-- Source_From_Unit_Name --
---------------------------
function Source_From_Unit_Name
(S : String;
Spec : Boolean)
return String_Access
is
Result_Prefix : String (1 .. S'Length);
Result_Selector : String (1 .. 4) := ".adb";
Initial_Length : constant Natural := S'Length;
Result_Length : Natural := Initial_Length;
-- this is for the name krunching
begin
for I in S'Range loop
Result_Prefix (I) := Convert_Char (S (I));
end loop;
Krunch
(Buffer => Result_Prefix,
Len => Result_Length,
Maxlen => Integer (Maximum_File_Name_Length),
No_Predef => False);
if Spec then
Result_Selector (4) := 's';
end if;
return new String'(Result_Prefix (1 .. Result_Length)
& Result_Selector
& ASCII.NUL);
end Source_From_Unit_Name;
---------------
-- To_String --
---------------
function To_String (S : String_Access) return String is
begin
return S.all (S'First .. S'Last - 1);
end To_String;
---------------------------
-- Tree_From_Source_Name --
---------------------------
function Tree_From_Source_Name (S : String_Access) return String_Access is
Return_Val : String_Access;
begin
Return_Val := new String'(S.all);
-- the content of S should be "*.ad?" & ASCII.NUL
Return_Val (Return_Val'Last - 1) := 't'; -- ".ad?" -> ".adt"
return Return_Val;
end Tree_From_Source_Name;
end A4G.U_Conv;
|