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[official-gcc.git] / gcc / ada / debug_a.adb
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1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- D E B U G _ A --
6 -- --
7 -- B o d y --
8 -- --
9 -- $Revision: 1.1.16.1 $
10 -- --
11 -- Copyright (C) 1992-1998 Free Software Foundation, Inc. --
12 -- --
13 -- GNAT is free software; you can redistribute it and/or modify it under --
14 -- terms of the GNU General Public License as published by the Free Soft- --
15 -- ware Foundation; either version 2, or (at your option) any later ver- --
16 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
17 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
18 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
19 -- for more details. You should have received a copy of the GNU General --
20 -- Public License distributed with GNAT; see file COPYING. If not, write --
21 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
22 -- MA 02111-1307, USA. --
23 -- --
24 -- GNAT was originally developed by the GNAT team at New York University. --
25 -- Extensive contributions were provided by Ada Core Technologies Inc. --
26 -- --
27 ------------------------------------------------------------------------------
29 with Atree; use Atree;
30 with Debug; use Debug;
31 with Sinfo; use Sinfo;
32 with Sinput; use Sinput;
33 with Output; use Output;
35 package body Debug_A is
37 Debug_A_Depth : Natural := 0;
38 -- Output for the debug A flag is preceded by a sequence of vertical bar
39 -- characters corresponding to the recursion depth of the actions being
40 -- recorded (analysis, expansion, resolution and evaluation of nodes)
41 -- This variable records the depth.
43 Max_Node_Ids : constant := 200;
44 -- Maximum number of Node_Id values that get stacked
46 Node_Ids : array (1 .. Max_Node_Ids) of Node_Id;
47 -- A stack used to keep track of Node_Id values for setting the value of
48 -- Current_Error_Node correctly. Note that if we have more than 200
49 -- recursion levels, we just don't reset the right value on exit, which
50 -- is not crucial, since this is only for debugging!
52 -----------------------
53 -- Local Subprograms --
54 -----------------------
56 procedure Debug_Output_Astring;
57 -- Outputs Debug_A_Depth number of vertical bars, used to preface messages
59 -------------------
60 -- Debug_A_Entry --
61 -------------------
63 procedure Debug_A_Entry (S : String; N : Node_Id) is
64 begin
65 if Debug_Flag_A then
66 Debug_Output_Astring;
67 Write_Str (S);
68 Write_Str ("Node_Id = ");
69 Write_Int (Int (N));
70 Write_Str (" ");
71 Write_Location (Sloc (N));
72 Write_Str (" ");
73 Write_Str (Node_Kind'Image (Nkind (N)));
74 Write_Eol;
75 end if;
77 Debug_A_Depth := Debug_A_Depth + 1;
78 Current_Error_Node := N;
80 if Debug_A_Depth <= Max_Node_Ids then
81 Node_Ids (Debug_A_Depth) := N;
82 end if;
83 end Debug_A_Entry;
85 ------------------
86 -- Debug_A_Exit --
87 ------------------
89 procedure Debug_A_Exit (S : String; N : Node_Id; Comment : String) is
90 begin
91 Debug_A_Depth := Debug_A_Depth - 1;
93 if Debug_A_Depth in 1 .. Max_Node_Ids then
94 Current_Error_Node := Node_Ids (Debug_A_Depth);
95 end if;
97 if Debug_Flag_A then
98 Debug_Output_Astring;
99 Write_Str (S);
100 Write_Str ("Node_Id = ");
101 Write_Int (Int (N));
102 Write_Str (Comment);
103 Write_Eol;
104 end if;
105 end Debug_A_Exit;
107 --------------------------
108 -- Debug_Output_Astring --
109 --------------------------
111 procedure Debug_Output_Astring is
112 Vbars : String := "|||||||||||||||||||||||||";
113 -- Should be constant, removed because of GNAT 1.78 bug ???
115 begin
116 if Debug_A_Depth > Vbars'Length then
117 for I in Vbars'Length .. Debug_A_Depth loop
118 Write_Char ('|');
119 end loop;
121 Write_Str (Vbars);
123 else
124 Write_Str (Vbars (1 .. Debug_A_Depth));
125 end if;
126 end Debug_Output_Astring;
128 end Debug_A;