gcc/ada/xsnames.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                          GNAT SYSTEM UTILITIES                           --
   4 --                                                                          --
   5 --                              X S N A M E S                               --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2005 Free Software Foundation, Inc.          --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- GNAT was originally developed  by the GNAT team at  New York University. --
  23 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  24 --                                                                          --
  25 ------------------------------------------------------------------------------
  26
  27 --  This utility is used to make a new version of the Snames package when new
  28 --  names are added to the spec, the existing versions of snames.ads and
  29 --  snames.adb and snames.h are read, and updated to match the set of names in
  30 --  snames.ads. The updated versions are written to snames.ns, snames.nb (new
  31 --  spec/body), and snames.nh (new header file).
  32
  33 with Ada.Strings.Unbounded;         use Ada.Strings.Unbounded;
  34 with Ada.Strings.Unbounded.Text_IO; use Ada.Strings.Unbounded.Text_IO;
  35 with Ada.Strings.Maps;              use Ada.Strings.Maps;
  36 with Ada.Strings.Maps.Constants;    use Ada.Strings.Maps.Constants;
  37 with Ada.Text_IO;                   use Ada.Text_IO;
  38
  39 with GNAT.Spitbol;                  use GNAT.Spitbol;
  40 with GNAT.Spitbol.Patterns;         use GNAT.Spitbol.Patterns;
  41
  42 procedure XSnames is
  43
  44    InB  : File_Type;
  45    InS  : File_Type;
  46    OutS : File_Type;
  47    OutB : File_Type;
  48    InH  : File_Type;
  49    OutH : File_Type;
  50
  51    A, B    : VString := Nul;
  52    Line    : VString := Nul;
  53    Name    : VString := Nul;
  54    Name1   : VString := Nul;
  55    Oname   : VString := Nul;
  56    Oval    : VString := Nul;
  57    Restl   : VString := Nul;
  58
  59    Tdigs : Pattern := Any (Decimal_Digit_Set) &
  60                       Any (Decimal_Digit_Set) &
  61                       Any (Decimal_Digit_Set);
  62
  63    Name_Ref : Pattern := Span (' ') * A & Break (' ') * Name
  64                            & Span (' ') * B
  65                            & ": constant Name_Id := N + " & Tdigs
  66                            & ';' & Rest * Restl;
  67
  68    Get_Name : Pattern := "Name_" & Rest * Name1;
  69
  70    Chk_Low  : Pattern := Pos (0) & Any (Lower_Set) & Rest & Pos (1);
  71
  72    Findu    : Pattern := Span ('u') * A;
  73
  74    Val : Natural;
  75
  76    Xlate_U_Und : Character_Mapping := To_Mapping ("u", "_");
  77
  78    M : Match_Result;
  79
  80    type Header_Symbol is (None, Attr, Conv, Prag);
  81    --  A symbol in the header file
  82
  83    --  Prefixes used in the header file
  84
  85    Header_Attr : aliased String := "Attr";
  86    Header_Conv : aliased String := "Convention";
  87    Header_Prag : aliased String := "Pragma";
  88
  89    type String_Ptr is access all String;
  90    Header_Prefix : constant array (Header_Symbol) of String_Ptr :=
  91                      (null,
  92                       Header_Attr'Access,
  93                       Header_Conv'Access,
  94                       Header_Prag'Access);
  95
  96    --  Patterns used in the spec file
  97
  98    Get_Attr : Pattern := Span (' ') & "Attribute_" & Break (",)") * Name1;
  99    Get_Conv : Pattern := Span (' ') & "Convention_" & Break (",)") * Name1;
 100    Get_Prag : Pattern := Span (' ') & "Pragma_" & Break (",)") * Name1;
 101
 102    type Header_Symbol_Counter is array (Header_Symbol) of Natural;
 103    Header_Counter : Header_Symbol_Counter := (0, 0, 0, 0);
 104
 105    Header_Current_Symbol : Header_Symbol := None;
 106    Header_Pending_Line : VString := Nul;
 107
 108    ------------------------
 109    -- Output_Header_Line --
 110    ------------------------
 111
 112    procedure Output_Header_Line (S : Header_Symbol) is
 113    begin
 114       --  Skip all the #define for S-prefixed symbols in the header.
 115       --  Of course we are making implicit assumptions:
 116       --   (1) No newline between symbols with the same prefix.
 117       --   (2) Prefix order is the same as in snames.ads.
 118
 119       if Header_Current_Symbol /= S then
 120          declare
 121             Pat : String := "#define  " & Header_Prefix (S).all;
 122             In_Pat : Boolean := False;
 123
 124          begin
 125             if Header_Current_Symbol /= None then
 126                Put_Line (OutH, Header_Pending_Line);
 127             end if;
 128
 129             loop
 130                Line := Get_Line (InH);
 131
 132                if Match (Line, Pat) then
 133                   In_Pat := true;
 134                elsif In_Pat then
 135                   Header_Pending_Line := Line;
 136                   exit;
 137                else
 138                   Put_Line (OutH, Line);
 139                end if;
 140             end loop;
 141
 142             Header_Current_Symbol := S;
 143          end;
 144       end if;
 145
 146       --  Now output the line
 147
 148       Put_Line (OutH, "#define  " & Header_Prefix (S).all
 149                   & "_" & Name1 & (30 - Length (Name1)) * ' '
 150                   & Header_Counter (S));
 151       Header_Counter (S) := Header_Counter (S) + 1;
 152    end Output_Header_Line;
 153
 154 --  Start of processing for XSnames
 155
 156 begin
 157    Open (InB, In_File, "snames.adb");
 158    Open (InS, In_File, "snames.ads");
 159    Open (InH, In_File, "snames.h");
 160
 161    Create (OutS, Out_File, "snames.ns");
 162    Create (OutB, Out_File, "snames.nb");
 163    Create (OutH, Out_File, "snames.nh");
 164
 165    Anchored_Mode := True;
 166    Oname := Nul;
 167    Val := 0;
 168
 169    loop
 170       Line := Get_Line (InB);
 171       exit when Match (Line, "   Preset_Names");
 172       Put_Line (OutB, Line);
 173    end loop;
 174
 175    Put_Line (OutB, Line);
 176
 177    LoopN : while not End_Of_File (InS) loop
 178       Line := Get_Line (InS);
 179
 180       if not Match (Line, Name_Ref) then
 181          Put_Line (OutS, Line);
 182
 183          if Match (Line, Get_Attr) then
 184             Output_Header_Line (Attr);
 185          elsif Match (Line, Get_Conv) then
 186             Output_Header_Line (Conv);
 187          elsif Match (Line, Get_Prag) then
 188             Output_Header_Line (Prag);
 189          end if;
 190       else
 191          Oval := Lpad (V (Val), 3, '0');
 192
 193          if Match (Name, "Last_") then
 194             Oval := Lpad (V (Val - 1), 3, '0');
 195          end if;
 196
 197          Put_Line
 198            (OutS, A & Name & B & ": constant Name_Id := N + "
 199             & Oval & ';' & Restl);
 200
 201          if Match (Name, Get_Name) then
 202             Name := Name1;
 203             Val := Val + 1;
 204
 205             if Match (Name, Findu, M) then
 206                Replace (M, Translate (A, Xlate_U_Und));
 207                Translate (Name, Lower_Case_Map);
 208
 209             elsif not Match (Name, "Op_", "") then
 210                Translate (Name, Lower_Case_Map);
 211
 212             else
 213                Name := 'O' & Translate (Name, Lower_Case_Map);
 214             end if;
 215
 216             if Name = "error" then
 217                Name := V ("<error>");
 218             end if;
 219
 220             if not Match (Name, Chk_Low) then
 221                Put_Line (OutB, "     """ & Name & "#"" &");
 222             end if;
 223          end if;
 224       end if;
 225    end loop LoopN;
 226
 227    loop
 228       Line := Get_Line (InB);
 229       exit when Match (Line, "     ""#"";");
 230    end loop;
 231
 232    Put_Line (OutB, Line);
 233
 234    while not End_Of_File (InB) loop
 235       Line := Get_Line (InB);
 236       Put_Line (OutB, Line);
 237    end loop;
 238
 239    Put_Line (OutH, Header_Pending_Line);
 240    while not End_Of_File (InH) loop
 241       Line := Get_Line (InH);
 242       Put_Line (OutH, Line);
 243    end loop;
 244 end XSnames;