1 ------------------------------------------------------------------------------
3 -- GNAT SYSTEM UTILITIES --
10 -- Copyright (C) 1992-2001 Free Software Foundation, Inc.
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- GNAT was originally developed by the GNAT team at New York University. --
24 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
26 ------------------------------------------------------------------------------
28 -- Program to construct the spec of the Treeprs package
32 -- sinfo.ads Spec of Sinfo package
33 -- treeprs.adt Template for Treeprs package
37 -- treeprs.ads Spec of Treeprs package
39 -- Note: this program assumes that sinfo.ads has passed the error checks which
40 -- are carried out by the CSinfo utility so it does not duplicate these checks
42 -- An optional argument allows the specification of an output file name to
43 -- override the default treeprs.ads file name for the generated output file.
45 with Ada.Command_Line; use Ada.Command_Line;
46 with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
47 with Ada.Strings.Unbounded.Text_IO; use Ada.Strings.Unbounded.Text_IO;
48 with Ada.Text_IO; use Ada.Text_IO;
50 with GNAT.Spitbol; use GNAT.Spitbol;
51 with GNAT.Spitbol.Patterns; use GNAT.Spitbol.Patterns;
52 with GNAT.Spitbol.Table_Boolean; use GNAT.Spitbol.Table_Boolean;
53 with GNAT.Spitbol.Table_VString; use GNAT.Spitbol.Table_VString;
57 package TB renames GNAT.Spitbol.Table_Boolean;
58 package TV renames GNAT.Spitbol.Table_VString;
61 -- Raised on fatal error
64 Ffield : VString := Nul;
65 Field : VString := Nul;
66 Fieldno : VString := Nul;
67 Flagno : VString := Nul;
68 Line : VString := Nul;
69 Name : VString := Nul;
70 Node : VString := Nul;
71 Outstring : VString := Nul;
72 Prefix : VString := Nul;
76 Synonym : VString := Nul;
77 Term : VString := Nul;
88 Special : TB.Table (20);
89 -- Table of special fields. These fields are not included in the table
90 -- constructed by Xtreeprs, since they are specially handled in treeprs.
91 -- This means these field definitions are completely ignored.
93 Names : array (1 .. 500) of VString;
94 -- Table of names of synonyms
96 Positions : array (1 .. 500) of Natural;
97 -- Table of starting positions in Pchars string for synonyms
99 Strings : TV.Table (300);
100 -- Contribution of each synonym to Pchars string, indexed by name
102 Count : Natural := 0;
103 -- Number of synonyms processed so far
105 Curpos : Natural := 1;
106 -- Number of characters generated in Pchars string so far
108 Lineno : Natural := 0;
109 -- Line number in sinfo.ads
111 Field_Base : constant := Character'Pos ('#');
112 -- Fields 1-5 are represented by the characters #$%&' (i.e. by five
113 -- contiguous characters starting at # (16#23#)).
115 Flag_Base : constant := Character'Pos ('(');
116 -- Flags 1-18 are represented by the characters ()*+,-./0123456789
117 -- (i.e. by 18 contiguous characters starting at (16#28#)).
120 -- Field character, as per above tables
122 Sp : aliased Natural;
123 -- Space left on line for Pchars output
125 wsp : Pattern := Span (' ' & ASCII.HT);
127 Is_Temp : Pattern := BreakX ('T') * A & "T e m p l a t e";
128 Get_Node : Pattern := wsp & "-- N_" & Rest * Node;
129 Tst_Punc : Pattern := Break (" ,.");
130 Get_Syn : Pattern := Span (' ') & "-- " & Break (' ') * Synonym
131 & " (" & Break (')') * Field;
132 Brk_Min : Pattern := Break ('-') * Ffield;
133 Is_Flag : Pattern := "Flag" & Rest * Flagno;
134 Is_Field : Pattern := Rtab (1) & Len (1) * Fieldno;
135 Is_Syn : Pattern := wsp & "N_" & Break (",)") * Syn & Len (1) * Term;
136 Brk_Node : Pattern := Break (' ') * Node & ' ';
137 Chop_SP : Pattern := Len (Sp'Unrestricted_Access) * S1;
142 Anchored_Mode := True;
144 if Argument_Count > 0 then
145 Create (OutS, Out_File, Argument (1));
147 Create (OutS, Out_File, "treeprs.ads");
150 Open (InS, In_File, "sinfo.ads");
151 Open (InT, In_File, "treeprs.adt");
153 -- Initialize special fields table
155 Set (Special, "Analyzed", True);
156 Set (Special, "Cannot_Be_Constant", True);
157 Set (Special, "Chars", True);
158 Set (Special, "Comes_From_Source", True);
159 Set (Special, "Error_Posted", True);
160 Set (Special, "Etype", True);
161 Set (Special, "Has_No_Side_Effects", True);
162 Set (Special, "Is_Controlling_Actual", True);
163 Set (Special, "Is_Overloaded", True);
164 Set (Special, "Is_Static_Expression", True);
165 Set (Special, "Left_Opnd", True);
166 Set (Special, "Must_Check_Expr", True);
167 Set (Special, "No_Overflow_Expr", True);
168 Set (Special, "Paren_Count", True);
169 Set (Special, "Raises_Constraint_Error", True);
170 Set (Special, "Right_Opnd", True);
172 -- Read template header and generate new header
175 Line := Get_Line (InT);
177 -- Skip lines describing the template
179 if Match (Line, "-- This file is a template") then
181 Line := Get_Line (InT);
186 exit when Match (Line, "package");
188 if Match (Line, Is_Temp, M) then
189 Replace (M, A & " S p e c ");
192 Put_Line (OutS, Line);
195 Put_Line (OutS, Line);
197 -- Copy rest of comments up to template insert point to spec
200 Line := Get_Line (InT);
201 exit when Match (Line, "!!TEMPLATE INSERTION POINT");
202 Put_Line (OutS, Line);
205 -- Here we are doing the actual insertions
207 Put_Line (OutS, " Pchars : constant String :=");
209 -- Loop through comments describing nodes, picking up fields
212 Line := Get_Line (InS);
213 Lineno := Lineno + 1;
214 exit when Match (Line, " type Node_Kind");
216 if Match (Line, Get_Node)
217 and then not Match (Node, Tst_Punc)
219 Outstring := Node & ' ';
222 Line := Get_Line (InS);
225 if Match (Line, Get_Syn)
226 and then not Match (Synonym, "plus")
227 and then not Present (Special, Synonym)
229 -- Convert this field into the character used to
230 -- represent the field according to the table:
256 if Match (Field, Brk_Min) then
260 if Match (Field, Is_Flag) then
261 Fieldch := Char (Flag_Base - 1 + N (Flagno));
263 elsif Match (Field, Is_Field) then
264 Fieldch := Char (Field_Base - 1 + N (Fieldno));
271 " has unrecognized field name " &
276 Append (Outstring, Fieldch & Synonym);
280 Set (Strings, Node, Outstring);
284 -- Loop through actual definitions of node kind enumeration literals
288 Line := Get_Line (InS);
289 Lineno := Lineno + 1;
290 exit when Match (Line, Is_Syn);
293 S := Get (Strings, Syn);
294 Match (S, Brk_Node, "");
296 Names (Count) := Syn;
297 Positions (Count) := Curpos;
298 Curpos := Curpos + Length (S);
299 Put_Line (OutS, " -- " & Node);
301 exit when Term = ")";
303 -- Loop to output the string literal for Pchars
306 Sp := 79 - 4 - Length (Prefix);
307 exit when (Size (S) <= Sp);
308 Match (S, Chop_SP, "");
309 Put_Line (OutS, Prefix & '"' & S1 & """ &");
313 Put_Line (OutS, Prefix & '"' & S & """ &");
316 Put_Line (OutS, " """";");
319 (OutS, " type Pchar_Pos_Array is array (Node_Kind) of Positive;");
322 " Pchar_Pos : constant Pchar_Pos_Array := Pchar_Pos_Array'(");
324 -- Output lines for Pchar_Pos_Array values
326 for M in 1 .. Count - 1 loop
327 Name := Rpad ("N_" & Names (M), 40);
328 Put_Line (OutS, " " & Name & " => " & Positions (M) & ',');
331 Name := Rpad ("N_" & Names (Count), 40);
332 Put_Line (OutS, " " & Name & " => " & Positions (Count) & ");");
335 Put_Line (OutS, "end Treeprs;");
339 Put_Line (Standard_Error, "*** fatal error");