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|
------------------------------------------------------------------------------
-- --
-- GNAT SYSTEM UTILITIES --
-- --
-- X N M A K E --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2001 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- --
-- 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. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- Program to construct the spec and body of the Nmake package
-- Input files:
-- sinfo.ads Spec of Sinfo package
-- nmake.adt Template for Nmake package
-- Output files:
-- nmake.ads Spec of Nmake package
-- nmake.adb Body of Nmake package
-- Note: this program assumes that sinfo.ads has passed the error checks that
-- are carried out by the csinfo utility, so it does not duplicate these
-- checks and assumes that sinfo.ads has the correct form.
-- In the absence of any switches, both the ads and adb files are output.
-- The switch -s or /s indicates that only the ads file is to be output.
-- The switch -b or /b indicates that only the adb file is to be output.
-- If a file name argument is given, then the output is written to this file
-- rather than to nmake.ads or nmake.adb. A file name can only be given if
-- exactly one of the -s or -b options is present.
with Ada.Command_Line; use Ada.Command_Line;
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 GNAT.Spitbol; use GNAT.Spitbol;
with GNAT.Spitbol.Patterns; use GNAT.Spitbol.Patterns;
procedure XNmake is
Err : exception;
-- Raised to terminate execution
A : VString := Nul;
Arg : VString := Nul;
Arg_List : VString := Nul;
Comment : VString := Nul;
Default : VString := Nul;
Field : VString := Nul;
Line : VString := Nul;
Node : VString := Nul;
Op_Name : VString := Nul;
Prevl : VString := Nul;
Synonym : VString := Nul;
X : VString := Nul;
Lineno : Natural;
NWidth : Natural;
FileS : VString := V ("nmake.ads");
FileB : VString := V ("nmake.adb");
-- Set to null if corresponding file not to be generated
Given_File : VString := Nul;
-- File name given by command line argument
InS, InT : File_Type;
OutS, OutB : File_Type;
wsp : Pattern := Span (' ' & ASCII.HT);
-- Note: in following patterns, we break up the word revision to
-- avoid RCS getting enthusiastic about updating the reference!
Body_Only : Pattern := BreakX (' ') * X & Span (' ') & "-- body only";
Spec_Only : Pattern := BreakX (' ') * X & Span (' ') & "-- spec only";
Node_Hdr : Pattern := wsp & "-- N_" & Rest * Node;
Punc : Pattern := BreakX (" .,");
Binop : Pattern := wsp & "-- plus fields for binary operator";
Unop : Pattern := wsp & "-- plus fields for unary operator";
Syn : Pattern := wsp & "-- " & Break (' ') * Synonym
& " (" & Break (')') * Field & Rest * Comment;
Templ : Pattern := BreakX ('T') * A & "T e m p l a t e";
Spec : Pattern := BreakX ('S') * A & "S p e c";
Sem_Field : Pattern := BreakX ('-') & "-Sem";
Lib_Field : Pattern := BreakX ('-') & "-Lib";
Get_Field : Pattern := BreakX (Decimal_Digit_Set) * Field;
Get_Dflt : Pattern := BreakX ('(') & "(set to "
& Break (" ") * Default & " if";
Next_Arg : Pattern := Break (',') * Arg & ',';
Op_Node : Pattern := "Op_" & Rest * Op_Name;
Shft_Rot : Pattern := "Shift_" or "Rotate_";
No_Ent : Pattern := "Or_Else" or "And_Then" or "In" or "Not_In";
M : Match_Result;
V_String_Id : constant VString := V ("String_Id");
V_Node_Id : constant VString := V ("Node_Id");
V_Name_Id : constant VString := V ("Name_Id");
V_List_Id : constant VString := V ("List_Id");
V_Elist_Id : constant VString := V ("Elist_Id");
V_Boolean : constant VString := V ("Boolean");
procedure WriteS (S : String);
procedure WriteB (S : String);
procedure WriteBS (S : String);
procedure WriteS (S : VString);
procedure WriteB (S : VString);
procedure WriteBS (S : VString);
-- Write given line to spec or body file or both if active
procedure WriteB (S : String) is
begin
if FileB /= Nul then
Put_Line (OutB, S);
end if;
end WriteB;
procedure WriteB (S : VString) is
begin
if FileB /= Nul then
Put_Line (OutB, S);
end if;
end WriteB;
procedure WriteBS (S : String) is
begin
if FileB /= Nul then
Put_Line (OutB, S);
end if;
if FileS /= Nul then
Put_Line (OutS, S);
end if;
end WriteBS;
procedure WriteBS (S : VString) is
begin
if FileB /= Nul then
Put_Line (OutB, S);
end if;
if FileS /= Nul then
Put_Line (OutS, S);
end if;
end WriteBS;
procedure WriteS (S : String) is
begin
if FileS /= Nul then
Put_Line (OutS, S);
end if;
end WriteS;
procedure WriteS (S : VString) is
begin
if FileS /= Nul then
Put_Line (OutS, S);
end if;
end WriteS;
-- Start of processing for XNmake
begin
-- Capture our revision (following line updated by RCS)
Lineno := 0;
NWidth := 28;
Anchored_Mode := True;
for ArgN in 1 .. Argument_Count loop
declare
Arg : constant String := Argument (ArgN);
begin
if Arg (1) = '-' then
if Arg'Length = 2
and then (Arg (2) = 'b' or else Arg (2) = 'B')
then
FileS := Nul;
elsif Arg'Length = 2
and then (Arg (2) = 's' or else Arg (2) = 'S')
then
FileB := Nul;
else
raise Err;
end if;
else
if Given_File /= Nul then
raise Err;
else
Given_File := V (Arg);
end if;
end if;
end;
end loop;
if FileS = Nul and then FileB = Nul then
raise Err;
elsif Given_File /= Nul then
if FileB = Nul then
FileS := Given_File;
elsif FileS = Nul then
FileB := Given_File;
else
raise Err;
end if;
end if;
Open (InS, In_File, "sinfo.ads");
Open (InT, In_File, "nmake.adt");
if FileS /= Nul then
Create (OutS, Out_File, S (FileS));
end if;
if FileB /= Nul then
Create (OutB, Out_File, S (FileB));
end if;
Anchored_Mode := True;
-- Copy initial part of template to spec and body
loop
Line := Get_Line (InT);
-- Skip lines describing the template
if Match (Line, "-- This file is a template") then
loop
Line := Get_Line (InT);
exit when Line = "";
end loop;
end if;
exit when Match (Line, "package");
if Match (Line, Body_Only, M) then
Replace (M, X);
WriteB (Line);
elsif Match (Line, Spec_Only, M) then
Replace (M, X);
WriteS (Line);
else
if Match (Line, Templ, M) then
Replace (M, A & " S p e c ");
end if;
WriteS (Line);
if Match (Line, Spec, M) then
Replace (M, A & "B o d y");
end if;
WriteB (Line);
end if;
end loop;
-- Package line reached
WriteS ("package Nmake is");
WriteB ("package body Nmake is");
WriteB ("");
-- Copy rest of lines up to template insert point to spec only
loop
Line := Get_Line (InT);
exit when Match (Line, "!!TEMPLATE INSERTION POINT");
WriteS (Line);
end loop;
-- Here we are doing the actual insertions, loop through node types
loop
Line := Get_Line (InS);
if Match (Line, Node_Hdr)
and then not Match (Node, Punc)
and then Node /= "Unused"
then
exit when Node = "Empty";
Prevl := " function Make_" & Node & " (Sloc : Source_Ptr";
Arg_List := Nul;
-- Loop through fields of one node
loop
Line := Get_Line (InS);
exit when Line = "";
if Match (Line, Binop) then
WriteBS (Prevl & ';');
Append (Arg_List, "Left_Opnd,Right_Opnd,");
WriteBS (
" " & Rpad ("Left_Opnd", NWidth) & " : Node_Id;");
Prevl :=
" " & Rpad ("Right_Opnd", NWidth) & " : Node_Id";
elsif Match (Line, Unop) then
WriteBS (Prevl & ';');
Append (Arg_List, "Right_Opnd,");
Prevl := " " & Rpad ("Right_Opnd", NWidth) & " : Node_Id";
elsif Match (Line, Syn) then
if Synonym /= "Prev_Ids"
and then Synonym /= "More_Ids"
and then Synonym /= "Comes_From_Source"
and then Synonym /= "Paren_Count"
and then not Match (Field, Sem_Field)
and then not Match (Field, Lib_Field)
then
Match (Field, Get_Field);
if Field = "Str" then Field := V_String_Id;
elsif Field = "Node" then Field := V_Node_Id;
elsif Field = "Name" then Field := V_Name_Id;
elsif Field = "List" then Field := V_List_Id;
elsif Field = "Elist" then Field := V_Elist_Id;
elsif Field = "Flag" then Field := V_Boolean;
end if;
if Field = "Boolean" then
Default := V ("False");
else
Default := Nul;
end if;
Match (Comment, Get_Dflt);
WriteBS (Prevl & ';');
Append (Arg_List, Synonym & ',');
Rpad (Synonym, NWidth);
if Default = "" then
Prevl := " " & Synonym & " : " & Field;
else
Prevl :=
" " & Synonym & " : " & Field & " := " & Default;
end if;
end if;
end if;
end loop;
WriteBS (Prevl & ')');
WriteS (" return Node_Id;");
WriteS (" pragma Inline (Make_" & Node & ");");
WriteB (" return Node_Id");
WriteB (" is");
WriteB (" N : constant Node_Id :=");
if Match (Node, "Defining_Identifier") or else
Match (Node, "Defining_Character") or else
Match (Node, "Defining_Operator")
then
WriteB (" New_Entity (N_" & Node & ", Sloc);");
else
WriteB (" New_Node (N_" & Node & ", Sloc);");
end if;
WriteB (" begin");
while Match (Arg_List, Next_Arg, "") loop
if Length (Arg) < NWidth then
WriteB (" Set_" & Arg & " (N, " & Arg & ");");
else
WriteB (" Set_" & Arg);
WriteB (" (N, " & Arg & ");");
end if;
end loop;
if Match (Node, Op_Node) then
if Node = "Op_Plus" then
WriteB (" Set_Chars (N, Name_Op_Add);");
elsif Node = "Op_Minus" then
WriteB (" Set_Chars (N, Name_Op_Subtract);");
elsif Match (Op_Name, Shft_Rot) then
WriteB (" Set_Chars (N, Name_" & Op_Name & ");");
else
WriteB (" Set_Chars (N, Name_" & Node & ");");
end if;
if not Match (Op_Name, No_Ent) then
WriteB (" Set_Entity (N, Standard_" & Node & ");");
end if;
end if;
WriteB (" return N;");
WriteB (" end Make_" & Node & ';');
WriteBS ("");
end if;
end loop;
WriteBS ("end Nmake;");
exception
when Err =>
Put_Line (Standard_Error, "usage: xnmake [-b] [-s] [filename]");
Set_Exit_Status (1);
end XNmake;
|