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------------------------------------------------------------------------------
-- --
-- GNAT SYSTEM UTILITIES --
-- --
-- X S N A M E S T --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2018, 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 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 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. --
-- --
------------------------------------------------------------------------------
-- This utility is used to make a new version of the Snames package when new
-- names are added. This version reads a template file from snames.ads-tmpl in
-- which the numbers are all written as $, and generates a new version of the
-- spec file snames.ads (written to snames.ns). It also reads snames.adb-tmpl
-- and generates an updated body (written to snames.nb), and snames.h-tmpl and
-- generates an updated C header file (written to snames.nh).
with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
with Ada.Strings.Unbounded.Text_IO; use Ada.Strings.Unbounded.Text_IO;
with Ada.Strings.Maps; use Ada.Strings.Maps;
with Ada.Strings.Maps.Constants; use Ada.Strings.Maps.Constants;
with Ada.Text_IO; use Ada.Text_IO;
with Ada.Streams.Stream_IO; use Ada.Streams.Stream_IO;
with GNAT.Spitbol; use GNAT.Spitbol;
with GNAT.Spitbol.Patterns; use GNAT.Spitbol.Patterns;
with XUtil; use XUtil;
procedure XSnamesT is
subtype VString is GNAT.Spitbol.VString;
InS : Ada.Text_IO.File_Type;
InB : Ada.Text_IO.File_Type;
InH : Ada.Text_IO.File_Type;
OutS : Ada.Streams.Stream_IO.File_Type;
OutB : Ada.Streams.Stream_IO.File_Type;
OutH : Ada.Streams.Stream_IO.File_Type;
A, B : VString := Nul;
Line : VString := Nul;
Name0 : VString := Nul;
Name1 : VString := Nul;
Oval : VString := Nul;
Restl : VString := Nul;
Name_Ref : constant Pattern := Span (' ') * A & Break (' ') * Name0
& Span (' ') * B
& ": constant Name_Id := N + $;"
& Rest * Restl;
Get_Name : constant Pattern := "Name_" & Rest * Name1;
Chk_Low : constant Pattern := Pos (0) & Any (Lower_Set) & Rest & Pos (1);
Findu : constant Pattern := Span ('u') * A;
Val : Natural;
Xlate_U_Und : constant Character_Mapping := To_Mapping ("u", "_");
M : Match_Result;
type Header_Symbol is (None, Name, Attr, Conv, Prag);
-- A symbol in the header file
procedure Output_Header_Line (S : Header_Symbol);
-- Output header line
Header_Name : aliased String := "Name";
Header_Attr : aliased String := "Attr";
Header_Conv : aliased String := "Convention";
Header_Prag : aliased String := "Pragma";
-- Prefixes used in the header file
type String_Ptr is access all String;
Header_Prefix : constant array (Header_Symbol) of String_Ptr :=
(null,
Header_Name'Access,
Header_Attr'Access,
Header_Conv'Access,
Header_Prag'Access);
-- Patterns used in the spec file
Get_Attr : constant Pattern := Span (' ') & "Attribute_"
& Break (",)") * Name1;
Get_Conv : constant Pattern := Span (' ') & "Convention_"
& Break (",)") * Name1;
Get_Prag : constant Pattern := Span (' ') & "Pragma_"
& Break (",)") * Name1;
type Header_Symbol_Counter is array (Header_Symbol) of Natural;
Header_Counter : Header_Symbol_Counter := (0, 0, 0, 0, 0);
Header_Current_Symbol : Header_Symbol := None;
Header_Pending_Line : VString := Nul;
------------------------
-- Output_Header_Line --
------------------------
procedure Output_Header_Line (S : Header_Symbol) is
function Make_Value (V : Integer) return String;
-- Build the definition for the current macro (Names are integers
-- offset to N, while other items are enumeration values).
----------------
-- Make_Value --
----------------
function Make_Value (V : Integer) return String is
begin
if S = Name then
return "(First_Name_Id + 256 + " & V & ")";
else
return "" & V;
end if;
end Make_Value;
-- Start of processing for Output_Header_Line
begin
-- Skip all the #define for S-prefixed symbols in the header.
-- Of course we are making implicit assumptions:
-- (1) No newline between symbols with the same prefix.
-- (2) Prefix order is the same as in snames.ads.
if Header_Current_Symbol /= S then
declare
Name2 : VString;
Pat : constant Pattern := "#define "
& Header_Prefix (S).all
& Break (' ') * Name2;
In_Pat : Boolean := False;
begin
if Header_Current_Symbol /= None then
Put_Line (OutH, Header_Pending_Line);
end if;
loop
Line := Get_Line (InH);
if Match (Line, Pat) then
In_Pat := True;
elsif In_Pat then
Header_Pending_Line := Line;
exit;
else
Put_Line (OutH, Line);
end if;
end loop;
Header_Current_Symbol := S;
end;
end if;
-- Now output the line
-- Note that we must ensure at least one space between macro name and
-- parens, otherwise the parenthesized value gets treated as an argument
-- specification.
Put_Line (OutH, "#define " & Header_Prefix (S).all
& "_" & Name1
& (30 - Natural'Min (29, Length (Name1))) * ' '
& Make_Value (Header_Counter (S)));
Header_Counter (S) := Header_Counter (S) + 1;
end Output_Header_Line;
-- Start of processing for XSnames
begin
Open (InS, In_File, "snames.ads-tmpl");
Open (InB, In_File, "snames.adb-tmpl");
Open (InH, In_File, "snames.h-tmpl");
-- Note that we do not generate snames.{ads,adb,h} directly. Instead
-- we output them to snames.n{s,b,h} so that Makefiles can use
-- move-if-change to not touch previously generated files if the
-- new ones are identical.
Create (OutS, Out_File, "snames.ns");
Create (OutB, Out_File, "snames.nb");
Create (OutH, Out_File, "snames.nh");
Put_Line (OutH, "#ifdef __cplusplus");
Put_Line (OutH, "extern ""C"" {");
Put_Line (OutH, "#endif");
Anchored_Mode := True;
Val := 0;
loop
Line := Get_Line (InB);
exit when Match (Line, " Preset_Names");
Put_Line (OutB, Line);
end loop;
Put_Line (OutB, Line);
LoopN : while not End_Of_File (InS) loop
Line := Get_Line (InS);
if not Match (Line, Name_Ref) then
Put_Line (OutS, Line);
if Match (Line, Get_Attr) then
Output_Header_Line (Attr);
elsif Match (Line, Get_Conv) then
Output_Header_Line (Conv);
elsif Match (Line, Get_Prag) then
Output_Header_Line (Prag);
end if;
else
if Match (Name0, "Last_") then
Oval := Lpad (V (Val - 1), 3, '0');
else
Oval := Lpad (V (Val), 3, '0');
end if;
Put_Line
(OutS, A & Name0 & B & ": constant Name_Id := N + "
& Oval & ';' & Restl);
if Match (Name0, Get_Name) then
Name0 := Name1;
Val := Val + 1;
if Match (Name0, Findu, M) then
Replace (M, Translate (A, Xlate_U_Und));
Translate (Name0, Lower_Case_Map);
elsif not Match (Name0, "Op_", "") then
Translate (Name0, Lower_Case_Map);
else
Name0 := 'O' & Translate (Name0, Lower_Case_Map);
end if;
if not Match (Name0, Chk_Low) then
Put_Line (OutB, " """ & Name0 & "#"" &");
end if;
Output_Header_Line (Name);
end if;
end if;
end loop LoopN;
loop
Line := Get_Line (InB);
exit when Match (Line, " ""#"";");
end loop;
Put_Line (OutB, Line);
while not End_Of_File (InB) loop
Line := Get_Line (InB);
Put_Line (OutB, Line);
end loop;
Put_Line (OutH, Header_Pending_Line);
while not End_Of_File (InH) loop
Line := Get_Line (InH);
Put_Line (OutH, Line);
end loop;
Put_Line (OutH, "#ifdef __cplusplus");
Put_Line (OutH, "}");
Put_Line (OutH, "#endif");
end XSnamesT;
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