summaryrefslogtreecommitdiff
path: root/gcc/ada/xsinfo.adb
blob: 3bf6011ffc076906e4966f4d4beb28592b58243d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
------------------------------------------------------------------------------
--                                                                          --
--                          GNAT SYSTEM UTILITIES                           --
--                                                                          --
--                               X S I N F O                                --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--          Copyright (C) 1992-2010, 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.      --
--                                                                          --
------------------------------------------------------------------------------

--  Program to construct C header file sinfo.h (C version of sinfo.ads spec,
--  for use by Gigi, contains all definitions and access functions, but does
--  not contain set procedures, since Gigi never modifies the GNAT tree)

--    Input files:

--       sinfo.ads     Spec of Sinfo package

--    Output files:

--       sinfo.h       Corresponding c header file

--  An optional argument allows the specification of an output file name to
--  override the default sinfo.h file name for the generated output file.

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.Text_IO;                   use Ada.Text_IO;

with GNAT.Spitbol;                  use GNAT.Spitbol;
with GNAT.Spitbol.Patterns;         use GNAT.Spitbol.Patterns;

with CSinfo;

procedure XSinfo is

   Done : exception;
   Err  : exception;

   A         : VString := Nul;
   Arg       : VString := Nul;
   Comment   : VString := Nul;
   Line      : VString := Nul;
   N         : VString := Nul;
   N1, N2    : VString := Nul;
   Nam       : VString := Nul;
   Rtn       : VString := Nul;
   Term      : VString := Nul;

   InS   : File_Type;
   Ofile : File_Type;

   wsp     : constant Pattern := Span (' ' & ASCII.HT);
   Wsp_For : constant Pattern := wsp & "for";
   Is_Cmnt : constant Pattern := wsp & "--";
   Typ_Nod : constant Pattern := wsp * A & "type Node_Kind is";
   Get_Nam : constant Pattern := wsp * A & "N_" &  Break (",)") * Nam
                                 & Len (1) * Term;
   Sub_Typ : constant Pattern := wsp * A & "subtype " &  Break (' ') * N;
   No_Cont : constant Pattern := wsp & Break (' ') * N1
                                 & " .. " & Break (';') * N2;
   Cont_N1 : constant Pattern := wsp & Break (' ') * N1 & " .." & Rpos (0);
   Cont_N2 : constant Pattern := Span (' ') & Break (';') * N2;
   Is_Func : constant Pattern := wsp * A & "function " & Rest * Nam;
   Get_Arg : constant Pattern := wsp & "(N : " & Break (')') * Arg
                                 & ") return " & Break (';') * Rtn
                                 & ';' & wsp & "--" & wsp & Rest * Comment;

   NKV : Natural;

   M : Match_Result;

   procedure Getline;
   --  Get non-comment, non-blank line. Also skips "for " rep clauses

   -------------
   -- Getline --
   -------------

   procedure Getline is
   begin
      loop
         Line := Get_Line (InS);

         if Line /= ""
           and then not Match (Line, Wsp_For)
           and then not Match (Line, Is_Cmnt)
         then
            return;

         elsif Match (Line, "   --  End functions (note") then
            raise Done;
         end if;
      end loop;
   end Getline;

--  Start of processing for XSinfo

begin
   --  First run CSinfo to check for errors. Note that CSinfo is also a
   --  stand-alone program that can be run separately.

   CSinfo;

   Set_Exit_Status (1);
   Anchored_Mode := True;

   if Argument_Count > 0 then
      Create (Ofile, Out_File, Argument (1));
   else
      Create (Ofile, Out_File, "sinfo.h");
   end if;

   Open (InS, In_File, "sinfo.ads");

   --  Write header to output file

   loop
      Line := Get_Line (InS);
      exit when Line = "";

      Match
        (Line,
         "--                                 S p e c       ",
         "--                              C Header File    ");

      Match (Line, "--", "/*");
      Match (Line, Rtab (2) * A & "--", M);
      Replace (M, A & "*/");
      Put_Line (Ofile, Line);
   end loop;

   --  Skip to package line

   loop
      Getline;
      exit when Match (Line, "package");
   end loop;

   --  Skip to first node kind line

   loop
      Getline;
      exit when Match (Line, Typ_Nod);
      Put_Line (Ofile, Line);
   end loop;

   Put_Line (Ofile, "");
   NKV := 0;

   --  Loop through node kind codes

   loop
      Getline;

      if Match (Line, Get_Nam) then
         Put_Line (Ofile, A & "#define N_" & Nam & ' ' & NKV);
         NKV := NKV + 1;
         exit when not Match (Term, ",");

      else
         Put_Line (Ofile, Line);
      end if;
   end loop;

   Put_Line (Ofile, "");
   Put_Line (Ofile, A & "#define Number_Node_Kinds " & NKV);

   --  Loop through subtype declarations

   loop
      Getline;

      if not Match (Line, Sub_Typ) then
         exit when Match (Line, "   function");
         Put_Line (Ofile, Line);

      else
         Put_Line (Ofile, A & "SUBTYPE (" & N & ", Node_Kind, ");
         Getline;

         --  Normal case

         if Match (Line, No_Cont) then
            Put_Line (Ofile, A & "   " & N1 & ", " & N2 & ')');

         --  Continuation case

         else
            if not Match (Line, Cont_N1) then
               raise Err;
            end if;

            Getline;

            if not Match (Line, Cont_N2) then
               raise Err;
            end if;

            Put_Line (Ofile,  A & "   " & N1 & ',');
            Put_Line (Ofile,  A & "   " & N2 & ')');
         end if;
      end if;
   end loop;

   --  Loop through functions. Note that this loop is terminated by
   --  the call to Getfile encountering the end of functions sentinel

   loop
      if Match (Line, Is_Func) then
         Getline;
            if not Match (Line, Get_Arg) then
               raise Err;
            end if;
         Put_Line
           (Ofile,
            A &  "INLINE " & Rpad (Rtn, 9)
            & ' ' & Rpad (Nam, 30) & " (" & Arg & " N)");

         Put_Line (Ofile,  A & "   { return " & Comment & " (N); }");

      else
         Put_Line (Ofile, Line);
      end if;

      Getline;
   end loop;

   --  Can't get here since above loop only left via raise

exception
   when Done =>
      Close (InS);
      Put_Line (Ofile, "");
      Close (Ofile);
      Set_Exit_Status (0);

end XSinfo;