1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
11 -- Copyright (C) 1992-2001 Free Software Foundation, Inc. --
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. --
24 -- As a special exception, if other files instantiate generics from this --
25 -- unit, or you link this unit with other files to produce an executable, --
26 -- this unit does not by itself cause the resulting executable to be --
27 -- covered by the GNU General Public License. This exception does not --
28 -- however invalidate any other reasons why the executable file might be --
29 -- covered by the GNU Public License. --
31 -- GNAT was originally developed by the GNAT team at New York University. --
32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
34 ------------------------------------------------------------------------------
36 -- This package contains low level output routines used by the compiler
37 -- for writing error messages and informational output. It is also used
38 -- by the debug source file output routines (see Sprintf.Print_Eol).
40 with Types; use Types;
43 pragma Elaborate_Body (Output);
45 type Output_Proc is access procedure (S : String);
46 -- This type is used for the Set_Special_Output procedure. If this
47 -- procedure is called, then instead of lines being written to
48 -- standard error or standard output, a call is made to the given
49 -- procedure for each line, passing the line with an end of line
50 -- character (which is a single ASCII.LF character, even in systems
51 -- which normally use CR/LF or some other sequence for line end).
57 procedure Set_Special_Output (P : Output_Proc);
58 -- Sets subsequent output to call procedure P. If P is null, then
59 -- the call cancels the effect of a previous call, reverting the
60 -- output to standard error or standard output depending on the
61 -- mode at the time of previous call. Any exception generated by
62 -- by calls to P is simply propagated to the caller of the routine
63 -- causing the write operation.
65 procedure Cancel_Special_Output;
66 -- Cancels the effect of a call to Set_Special_Output, if any.
67 -- The output is then directed to standard error or standard output
68 -- depending on the last call to Set_Standard_Error or Set_Standard_Output.
69 -- It is never an error to call Cancel_Special_Output. It has the same
70 -- effect as calling Set_Special_Output (null).
72 procedure Set_Standard_Error;
73 -- Sets subsequent output to appear on the standard error file (whatever
74 -- that might mean for the host operating system, if anything) when
75 -- no special output is in effect. When a special output is in effect,
76 -- the output will appear on standard error only after special output
77 -- has been cancelled.
79 procedure Set_Standard_Output;
80 -- Sets subsequent output to appear on the standard output file (whatever
81 -- that might mean for the host operating system, if anything) when
82 -- no special output is in effect. When a special output is in effect,
83 -- the output will appear on standard output only after special output
84 -- has been cancelled. Output to standard output is the default mode
85 -- before any call to either of the Set procedures.
87 procedure Write_Char (C : Character);
88 -- Write one character to the standard output file. Note that the
89 -- character should not be LF or CR (use Write_Eol for end of line)
92 -- Write an end of line (whatever is required by the system in use,
93 -- e.g. CR/LF for DOS, or LF for Unix) to the standard output file.
94 -- This routine also empties the line buffer, actually writing it
95 -- to the file. Note that Write_Eol is the only routine that causes
96 -- any actual output to be written.
98 procedure Write_Int (Val : Int);
99 -- Write an integer value with no leading blanks or zeroes. Negative
100 -- values are preceded by a minus sign).
102 procedure Write_Str (S : String);
103 -- Write a string of characters to the standard output file. Note that
104 -- end of line is handled separately using WRITE_EOL, so the string
105 -- should not contain either of the characters LF or CR, but it may
106 -- contain horizontal tab characters.
108 procedure Write_Line (S : String);
109 -- Equivalent to Write_Str (S) followed by Write_Eol;
111 function Column return Nat;
112 pragma Inline (Column);
113 -- Returns the number of the column about to be written (e.g. a value
114 -- of 1 means the current line is empty).
116 --------------------------
117 -- Debugging Procedures --
118 --------------------------
120 -- The following procedures are intended only for debugging purposes,
121 -- for temporary insertion into the text in environments where a debugger
122 -- is not available. They all have non-standard very short lower case
123 -- names, precisely to make sure that they are only used for debugging!
125 procedure w (C : Character);
126 -- Dump quote, character quote, followed by line return
128 procedure w (S : String);
129 -- Dump string followed by line return
131 procedure w (V : Int);
132 -- Dump integer followed by line return
134 procedure w (B : Boolean);
135 -- Dump Boolean followed by line return
137 procedure w (L : String; C : Character);
138 -- Dump contents of string followed by blank, quote, character, quote
140 procedure w (L : String; S : String);
141 -- Dump two strings separated by blanks, followed by line return
143 procedure w (L : String; V : Int);
144 -- Dump contents of string followed by blank, integer, line return
146 procedure w (L : String; B : Boolean);
147 -- Dump contents of string followed by blank, Boolean, line return