/usr/share/ada/adainclude/gnatvsn/output.adb is in libgnatvsn4.6-dev 4.6.3-1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 | ------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- O U T P U T --
-- --
-- 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
package body Output is
Current_FD : File_Descriptor := Standout;
-- File descriptor for current output
Special_Output_Proc : Output_Proc := null;
-- Record argument to last call to Set_Special_Output. If this is
-- non-null, then we are in special output mode.
Indentation_Amount : constant Positive := 3;
-- Number of spaces to output for each indentation level
Indentation_Limit : constant Positive := 40;
-- Indentation beyond this number of spaces wraps around
pragma Assert (Indentation_Limit < Buffer_Max / 2);
-- Make sure this is substantially shorter than the line length
Cur_Indentation : Natural := 0;
-- Number of spaces to indent each line
-----------------------
-- Local_Subprograms --
-----------------------
procedure Flush_Buffer;
-- Flush buffer if non-empty and reset column counter
---------------------------
-- Cancel_Special_Output --
---------------------------
procedure Cancel_Special_Output is
begin
Special_Output_Proc := null;
end Cancel_Special_Output;
------------
-- Column --
------------
function Column return Pos is
begin
return Pos (Next_Col);
end Column;
------------------
-- Flush_Buffer --
------------------
procedure Flush_Buffer is
Write_Error : exception;
-- Raised if Write fails
------------------
-- Write_Buffer --
------------------
procedure Write_Buffer (Buf : String);
-- Write out Buf, either using Special_Output_Proc, or the normal way
-- using Write. Raise Write_Error if Write fails (presumably due to disk
-- full). Write_Error is not used in the case of Special_Output_Proc.
procedure Write_Buffer (Buf : String) is
begin
-- If Special_Output_Proc has been set, then use it
if Special_Output_Proc /= null then
Special_Output_Proc.all (Buf);
-- If output is not set, then output to either standard output
-- or standard error.
elsif Write (Current_FD, Buf'Address, Buf'Length) /= Buf'Length then
raise Write_Error;
end if;
end Write_Buffer;
Len : constant Natural := Next_Col - 1;
-- Start of processing for Flush_Buffer
begin
if Len /= 0 then
begin
-- If there's no indentation, or if the line is too long with
-- indentation, or if it's a blank line, just write the buffer.
if Cur_Indentation = 0
or else Cur_Indentation + Len > Buffer_Max
or else Buffer (1 .. Len) = (1 => ASCII.LF)
then
Write_Buffer (Buffer (1 .. Len));
-- Otherwise, construct a new buffer with preceding spaces, and
-- write that.
else
declare
Indented_Buffer : constant String :=
(1 .. Cur_Indentation => ' ') &
Buffer (1 .. Len);
begin
Write_Buffer (Indented_Buffer);
end;
end if;
exception
when Write_Error =>
-- If there are errors with standard error just quit. Otherwise
-- set the output to standard error before reporting a failure
-- and quitting.
if Current_FD /= Standerr then
Current_FD := Standerr;
Next_Col := 1;
Write_Line ("fatal error: disk full");
end if;
OS_Exit (2);
end;
-- Buffer is now empty
Next_Col := 1;
end if;
end Flush_Buffer;
-------------------
-- Ignore_Output --
-------------------
procedure Ignore_Output (S : String) is
begin
null;
end Ignore_Output;
------------
-- Indent --
------------
procedure Indent is
begin
-- The "mod" in the following assignment is to cause a wrap around in
-- the case where there is too much indentation.
Cur_Indentation :=
(Cur_Indentation + Indentation_Amount) mod Indentation_Limit;
end Indent;
-------------
-- Outdent --
-------------
procedure Outdent is
begin
-- The "mod" here undoes the wrap around from Indent above
Cur_Indentation :=
(Cur_Indentation - Indentation_Amount) mod Indentation_Limit;
end Outdent;
---------------------------
-- Restore_Output_Buffer --
---------------------------
procedure Restore_Output_Buffer (S : Saved_Output_Buffer) is
begin
Next_Col := S.Next_Col;
Cur_Indentation := S.Cur_Indentation;
Buffer (1 .. Next_Col - 1) := S.Buffer (1 .. Next_Col - 1);
end Restore_Output_Buffer;
------------------------
-- Save_Output_Buffer --
------------------------
function Save_Output_Buffer return Saved_Output_Buffer is
S : Saved_Output_Buffer;
begin
S.Buffer (1 .. Next_Col - 1) := Buffer (1 .. Next_Col - 1);
S.Next_Col := Next_Col;
S.Cur_Indentation := Cur_Indentation;
Next_Col := 1;
Cur_Indentation := 0;
return S;
end Save_Output_Buffer;
------------------------
-- Set_Special_Output --
------------------------
procedure Set_Special_Output (P : Output_Proc) is
begin
Special_Output_Proc := P;
end Set_Special_Output;
----------------
-- Set_Output --
----------------
procedure Set_Output (FD : File_Descriptor) is
begin
if Special_Output_Proc = null then
Flush_Buffer;
end if;
Current_FD := FD;
end Set_Output;
------------------------
-- Set_Standard_Error --
------------------------
procedure Set_Standard_Error is
begin
Set_Output (Standerr);
end Set_Standard_Error;
-------------------------
-- Set_Standard_Output --
-------------------------
procedure Set_Standard_Output is
begin
Set_Output (Standout);
end Set_Standard_Output;
-------
-- w --
-------
procedure w (C : Character) is
begin
Write_Char (''');
Write_Char (C);
Write_Char (''');
Write_Eol;
end w;
procedure w (S : String) is
begin
Write_Str (S);
Write_Eol;
end w;
procedure w (V : Int) is
begin
Write_Int (V);
Write_Eol;
end w;
procedure w (B : Boolean) is
begin
if B then
w ("True");
else
w ("False");
end if;
end w;
procedure w (L : String; C : Character) is
begin
Write_Str (L);
Write_Char (' ');
w (C);
end w;
procedure w (L : String; S : String) is
begin
Write_Str (L);
Write_Char (' ');
w (S);
end w;
procedure w (L : String; V : Int) is
begin
Write_Str (L);
Write_Char (' ');
w (V);
end w;
procedure w (L : String; B : Boolean) is
begin
Write_Str (L);
Write_Char (' ');
w (B);
end w;
----------------
-- Write_Char --
----------------
procedure Write_Char (C : Character) is
begin
if Next_Col = Buffer'Length then
Write_Eol;
end if;
if C = ASCII.LF then
Write_Eol;
else
Buffer (Next_Col) := C;
Next_Col := Next_Col + 1;
end if;
end Write_Char;
---------------
-- Write_Eol --
---------------
procedure Write_Eol is
begin
-- Remove any trailing space
while Next_Col > 1 and then Buffer (Next_Col - 1) = ' ' loop
Next_Col := Next_Col - 1;
end loop;
Buffer (Next_Col) := ASCII.LF;
Next_Col := Next_Col + 1;
Flush_Buffer;
end Write_Eol;
---------------------------
-- Write_Eol_Keep_Blanks --
---------------------------
procedure Write_Eol_Keep_Blanks is
begin
Buffer (Next_Col) := ASCII.LF;
Next_Col := Next_Col + 1;
Flush_Buffer;
end Write_Eol_Keep_Blanks;
----------------------
-- Write_Erase_Char --
----------------------
procedure Write_Erase_Char (C : Character) is
begin
if Next_Col /= 1 and then Buffer (Next_Col - 1) = C then
Next_Col := Next_Col - 1;
end if;
end Write_Erase_Char;
---------------
-- Write_Int --
---------------
procedure Write_Int (Val : Int) is
begin
if Val < 0 then
Write_Char ('-');
Write_Int (-Val);
else
if Val > 9 then
Write_Int (Val / 10);
end if;
Write_Char (Character'Val ((Val mod 10) + Character'Pos ('0')));
end if;
end Write_Int;
----------------
-- Write_Line --
----------------
procedure Write_Line (S : String) is
begin
Write_Str (S);
Write_Eol;
end Write_Line;
------------------
-- Write_Spaces --
------------------
procedure Write_Spaces (N : Nat) is
begin
for J in 1 .. N loop
Write_Char (' ');
end loop;
end Write_Spaces;
---------------
-- Write_Str --
---------------
procedure Write_Str (S : String) is
begin
for J in S'Range loop
Write_Char (S (J));
end loop;
end Write_Str;
end Output;
|