1 ------------------------------------------------------------------------------
3 -- GNAT SYSTEM UTILITIES --
9 -- Copyright (C) 1992-2007, Free Software Foundation, Inc. --
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 3, 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 COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- Program to construct the spec of the Treeprs package
30 -- sinfo.ads Spec of Sinfo package
31 -- treeprs.adt Template for Treeprs package
35 -- treeprs.ads Spec of Treeprs package
37 -- Note: this program assumes that sinfo.ads has passed the error checks which
38 -- are carried out by the CSinfo utility so it does not duplicate these checks
40 -- An optional argument allows the specification of an output file name to
41 -- override the default treeprs.ads file name for the generated output file.
43 with Ada.Command_Line; use Ada.Command_Line;
44 with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
45 with Ada.Strings.Unbounded.Text_IO; use Ada.Strings.Unbounded.Text_IO;
46 with Ada.Text_IO; use Ada.Text_IO;
47 with Ada.Streams.Stream_IO; use Ada.Streams.Stream_IO;
49 with GNAT.Spitbol; use GNAT.Spitbol;
50 with GNAT.Spitbol.Patterns; use GNAT.Spitbol.Patterns;
51 with GNAT.Spitbol.Table_Boolean; use GNAT.Spitbol.Table_Boolean;
52 with GNAT.Spitbol.Table_VString; use GNAT.Spitbol.Table_VString;
56 package TB renames GNAT.Spitbol.Table_Boolean;
57 package TV renames GNAT.Spitbol.Table_VString;
60 -- Raised on fatal error
62 pragma Warnings (Off);
63 -- Following variables are assigned by * operator
66 Ffield : VString := Nul;
67 Field : VString := Nul;
68 Fieldno : VString := Nul;
69 Flagno : VString := Nul;
70 Line : VString := Nul;
71 Name : VString := Nul;
72 Node : VString := Nul;
73 Outstring : VString := Nul;
74 Prefix : VString := Nul;
78 Synonym : VString := Nul;
79 Term : VString := Nul;
83 subtype Sfile is Ada.Streams.Stream_IO.File_Type;
88 InS : Ada.Text_IO.File_Type;
91 InT : Ada.Text_IO.File_Type;
94 Special : TB.Table (20);
95 -- Table of special fields. These fields are not included in the table
96 -- constructed by Xtreeprs, since they are specially handled in treeprs.
97 -- This means these field definitions are completely ignored.
99 Names : array (1 .. 500) of VString;
100 -- Table of names of synonyms
102 Positions : array (1 .. 500) of Natural;
103 -- Table of starting positions in Pchars string for synonyms
105 Strings : TV.Table (300);
106 -- Contribution of each synonym to Pchars string, indexed by name
108 Count : Natural := 0;
109 -- Number of synonyms processed so far
111 Curpos : Natural := 1;
112 -- Number of characters generated in Pchars string so far
114 Lineno : Natural := 0;
115 -- Line number in sinfo.ads
117 Field_Base : constant := Character'Pos ('#');
118 -- Fields 1-5 are represented by the characters #$%&' (i.e. by five
119 -- contiguous characters starting at # (16#23#)).
121 Flag_Base : constant := Character'Pos ('(');
122 -- Flags 1-18 are represented by the characters ()*+,-./0123456789
123 -- (i.e. by 18 contiguous characters starting at (16#28#)).
126 -- Field character, as per above tables
128 Sp : aliased Natural;
129 -- Space left on line for Pchars output
131 wsp : constant Pattern := Span (' ' & ASCII.HT);
132 Is_Temp : constant Pattern := BreakX ('T') * A & "T e m p l a t e";
133 Get_Node : constant Pattern := wsp & "-- N_" & Rest * Node;
134 Tst_Punc : constant Pattern := Break (" ,.");
135 Get_Syn : constant Pattern := Span (' ') & "-- " & Break (' ') * Synonym
136 & " (" & Break (')') * Field;
137 Brk_Min : constant Pattern := Break ('-') * Ffield;
138 Is_Flag : constant Pattern := "Flag" & Rest * Flagno;
139 Is_Field : constant Pattern := Rtab (1) & Len (1) * Fieldno;
140 Is_Syn : constant Pattern := wsp & "N_" & Break (",)") * Syn
142 Brk_Node : constant Pattern := Break (' ') * Node & ' ';
143 Chop_SP : constant Pattern := Len (Sp'Unrestricted_Access) * S1;
147 procedure Put_Line (F : Sfile; S : String);
148 procedure Put_Line (F : Sfile; S : VString);
149 -- Local version of Put_Line ensures Unix style line endings
151 procedure Put_Line (F : Sfile; S : String) is
153 String'Write (Stream (F), S);
154 Character'Write (Stream (F), ASCII.LF);
157 procedure Put_Line (F : Sfile; S : VString) is
159 Put_Line (F, To_String (S));
162 -- Start of processing for XTreeprs
165 Anchored_Mode := True;
167 if Argument_Count > 0 then
168 Create (OutS, Out_File, Argument (1));
170 Create (OutS, Out_File, "treeprs.ads");
173 Open (InS, In_File, "sinfo.ads");
174 Open (InT, In_File, "treeprs.adt");
176 -- Initialize special fields table
178 Set (Special, "Analyzed", True);
179 Set (Special, "Cannot_Be_Constant", True);
180 Set (Special, "Chars", True);
181 Set (Special, "Comes_From_Source", True);
182 Set (Special, "Error_Posted", True);
183 Set (Special, "Etype", True);
184 Set (Special, "Has_No_Side_Effects", True);
185 Set (Special, "Is_Controlling_Actual", True);
186 Set (Special, "Is_Overloaded", True);
187 Set (Special, "Is_Static_Expression", True);
188 Set (Special, "Left_Opnd", True);
189 Set (Special, "Must_Check_Expr", True);
190 Set (Special, "No_Overflow_Expr", True);
191 Set (Special, "Paren_Count", True);
192 Set (Special, "Raises_Constraint_Error", True);
193 Set (Special, "Right_Opnd", True);
195 -- Read template header and generate new header
198 Line := Get_Line (InT);
200 -- Skip lines describing the template
202 if Match (Line, "-- This file is a template") then
204 Line := Get_Line (InT);
209 exit when Match (Line, "package");
211 if Match (Line, Is_Temp, M) then
212 Replace (M, A & " S p e c ");
215 Put_Line (OutS, Line);
218 Put_Line (OutS, Line);
220 -- Copy rest of comments up to template insert point to spec
223 Line := Get_Line (InT);
224 exit when Match (Line, "!!TEMPLATE INSERTION POINT");
225 Put_Line (OutS, Line);
228 -- Here we are doing the actual insertions
230 Put_Line (OutS, " Pchars : constant String :=");
232 -- Loop through comments describing nodes, picking up fields
235 Line := Get_Line (InS);
236 Lineno := Lineno + 1;
237 exit when Match (Line, " type Node_Kind");
239 if Match (Line, Get_Node)
240 and then not Match (Node, Tst_Punc)
242 Outstring := Node & ' ';
245 Line := Get_Line (InS);
248 if Match (Line, Get_Syn)
249 and then not Match (Synonym, "plus")
250 and then not Present (Special, Synonym)
252 -- Convert this field into the character used to
253 -- represent the field according to the table:
279 if Match (Field, Brk_Min) then
283 if Match (Field, Is_Flag) then
284 Fieldch := Char (Flag_Base - 1 + N (Flagno));
286 elsif Match (Field, Is_Field) then
287 Fieldch := Char (Field_Base - 1 + N (Fieldno));
294 " has unrecognized field name " &
299 Append (Outstring, Fieldch & Synonym);
303 Set (Strings, Node, Outstring);
307 -- Loop through actual definitions of node kind enumeration literals
311 Line := Get_Line (InS);
312 Lineno := Lineno + 1;
313 exit when Match (Line, Is_Syn);
316 S := Get (Strings, Syn);
317 Match (S, Brk_Node, "");
319 Names (Count) := Syn;
320 Positions (Count) := Curpos;
321 Curpos := Curpos + Length (S);
322 Put_Line (OutS, " -- " & Node);
324 exit when Term = ")";
326 -- Loop to output the string literal for Pchars
329 Sp := 79 - 4 - Length (Prefix);
330 exit when Size (S) <= Sp;
331 Match (S, Chop_SP, "");
332 Put_Line (OutS, Prefix & '"' & S1 & """ &");
336 Put_Line (OutS, Prefix & '"' & S & """ &");
339 Put_Line (OutS, " """";");
342 (OutS, " type Pchar_Pos_Array is array (Node_Kind) of Positive;");
345 " Pchar_Pos : constant Pchar_Pos_Array := Pchar_Pos_Array'(");
347 -- Output lines for Pchar_Pos_Array values
349 for M in 1 .. Count - 1 loop
350 Name := Rpad ("N_" & Names (M), 40);
351 Put_Line (OutS, " " & Name & " => " & Positions (M) & ',');
354 Name := Rpad ("N_" & Names (Count), 40);
355 Put_Line (OutS, " " & Name & " => " & Positions (Count) & ");");
358 Put_Line (OutS, "end Treeprs;");
362 Put_Line (Standard_Error, "*** fatal error");