1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2006, 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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 with GNAT
.OS_Lib
; use GNAT
.OS_Lib
;
36 package body Output
is
38 Current_FD
: File_Descriptor
:= Standout
;
39 -- File descriptor for current output
41 Special_Output_Proc
: Output_Proc
:= null;
42 -- Record argument to last call to Set_Special_Output. If this is
43 -- non-null, then we are in special output mode.
45 -----------------------
46 -- Local_Subprograms --
47 -----------------------
49 procedure Flush_Buffer
;
50 -- Flush buffer if non-empty and reset column counter
52 ---------------------------
53 -- Cancel_Special_Output --
54 ---------------------------
56 procedure Cancel_Special_Output
is
58 Special_Output_Proc
:= null;
59 end Cancel_Special_Output
;
65 function Column
return Pos
is
67 return Pos
(Next_Col
);
74 procedure Flush_Buffer
is
75 Len
: constant Natural := Next_Col
- 1;
80 -- If Special_Output_Proc has been set, then use it
82 if Special_Output_Proc
/= null then
83 Special_Output_Proc
.all (Buffer
(1 .. Len
));
85 -- If output is not set, then output to either standard output
88 elsif Len
/= Write
(Current_FD
, Buffer
'Address, Len
) then
90 -- If there are errors with standard error, just quit
92 if Current_FD
= Standerr
then
95 -- Otherwise, set the output to standard error before
96 -- reporting a failure and quitting.
99 Current_FD
:= Standerr
;
101 Write_Line
("fatal error: disk full");
106 -- Buffer is now empty
112 ---------------------------
113 -- Restore_Output_Buffer --
114 ---------------------------
116 procedure Restore_Output_Buffer
(S
: Saved_Output_Buffer
) is
118 Next_Col
:= S
.Next_Col
;
119 Buffer
(1 .. Next_Col
- 1) := S
.Buffer
(1 .. Next_Col
- 1);
120 end Restore_Output_Buffer
;
122 ------------------------
123 -- Save_Output_Buffer --
124 ------------------------
126 function Save_Output_Buffer
return Saved_Output_Buffer
is
127 S
: Saved_Output_Buffer
;
129 S
.Buffer
(1 .. Next_Col
- 1) := Buffer
(1 .. Next_Col
- 1);
130 S
.Next_Col
:= Next_Col
;
133 end Save_Output_Buffer
;
135 ------------------------
136 -- Set_Special_Output --
137 ------------------------
139 procedure Set_Special_Output
(P
: Output_Proc
) is
141 Special_Output_Proc
:= P
;
142 end Set_Special_Output
;
144 ------------------------
145 -- Set_Standard_Error --
146 ------------------------
148 procedure Set_Standard_Error
is
150 if Special_Output_Proc
= null then
155 Current_FD
:= Standerr
;
156 end Set_Standard_Error
;
158 -------------------------
159 -- Set_Standard_Output --
160 -------------------------
162 procedure Set_Standard_Output
is
164 if Special_Output_Proc
= null then
169 Current_FD
:= Standout
;
170 end Set_Standard_Output
;
176 procedure w
(C
: Character) is
184 procedure w
(S
: String) is
190 procedure w
(V
: Int
) is
196 procedure w
(B
: Boolean) is
205 procedure w
(L
: String; C
: Character) is
212 procedure w
(L
: String; S
: String) is
219 procedure w
(L
: String; V
: Int
) is
226 procedure w
(L
: String; B
: Boolean) is
237 procedure Write_Char
(C
: Character) is
239 if Next_Col
= Buffer
'Length then
246 Buffer
(Next_Col
) := C
;
247 Next_Col
:= Next_Col
+ 1;
255 procedure Write_Eol
is
257 Buffer
(Next_Col
) := ASCII
.LF
;
258 Next_Col
:= Next_Col
+ 1;
262 ----------------------
263 -- Write_Erase_Char --
264 ----------------------
266 procedure Write_Erase_Char
(C
: Character) is
268 if Next_Col
/= 1 and then Buffer
(Next_Col
- 1) = C
then
269 Next_Col
:= Next_Col
- 1;
271 end Write_Erase_Char
;
277 procedure Write_Int
(Val
: Int
) is
285 Write_Int
(Val
/ 10);
288 Write_Char
(Character'Val ((Val
mod 10) + Character'Pos ('0')));
296 procedure Write_Line
(S
: String) is
306 procedure Write_Spaces
(N
: Nat
) is
317 procedure Write_Str
(S
: String) is
319 for J
in S
'Range loop