6cbcc54138
* xeinfo.adb: Don't look for revision numbers. * xnmake.adb: Likewise. * xsinfo.adb: Likewise. * xsnames.adb: Likewise. * xtreeprs.adb: Likewise. From-SVN: r50768
298 lines
8.4 KiB
Ada
298 lines
8.4 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- O U T P U T --
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-- --
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-- B o d y --
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-- --
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-- --
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-- Copyright (C) 1992-2001, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
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-- MA 02111-1307, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
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-- --
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------------------------------------------------------------------------------
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with GNAT.OS_Lib; use GNAT.OS_Lib;
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package body Output is
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Current_FD : File_Descriptor := Standout;
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-- File descriptor for current output
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Special_Output_Proc : Output_Proc := null;
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-- Record argument to last call to Set_Special_Output. If this is
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-- non-null, then we are in special output mode.
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-------------------------
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-- Line Buffer Control --
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-------------------------
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-- Note: the following buffer and column position are maintained by
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-- the subprograms defined in this package, and are not normally
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-- directly modified or accessed by a client. However, a client is
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-- permitted to modify these values, using the knowledge that only
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-- Write_Eol actually generates any output.
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Buffer_Max : constant := 8192;
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Buffer : String (1 .. Buffer_Max + 1);
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-- Buffer used to build output line. We do line buffering because it
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-- is needed for the support of the debug-generated-code option (-gnatD).
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-- Historically it was first added because on VMS, line buffering is
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-- needed with certain file formats. So in any case line buffering must
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-- be retained for this purpose, even if other reasons disappear. Note
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-- any attempt to write more output to a line than can fit in the buffer
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-- will be silently ignored.
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Next_Column : Pos range 1 .. Buffer'Length + 1 := 1;
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-- Column about to be written.
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-----------------------
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-- Local_Subprograms --
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-----------------------
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procedure Flush_Buffer;
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-- Flush buffer if non-empty and reset column counter
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---------------------------
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-- Cancel_Special_Output --
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---------------------------
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procedure Cancel_Special_Output is
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begin
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Special_Output_Proc := null;
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end Cancel_Special_Output;
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------------------
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-- Flush_Buffer --
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------------------
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procedure Flush_Buffer is
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Len : constant Natural := Natural (Next_Column - 1);
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begin
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if Len /= 0 then
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-- If Special_Output_Proc has been set, then use it
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if Special_Output_Proc /= null then
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Special_Output_Proc.all (Buffer (1 .. Len));
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-- If output is not set, then output to either standard output
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-- or standard error.
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elsif Len /= Write (Current_FD, Buffer'Address, Len) then
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-- If there are errors with standard error, just quit
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if Current_FD = Standerr then
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OS_Exit (2);
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-- Otherwise, set the output to standard error before
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-- reporting a failure and quitting.
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else
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Current_FD := Standerr;
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Next_Column := 1;
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Write_Line ("fatal error: disk full");
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OS_Exit (2);
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end if;
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end if;
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-- Buffer is now empty
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Next_Column := 1;
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end if;
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end Flush_Buffer;
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------------
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-- Column --
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------------
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function Column return Nat is
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begin
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return Next_Column;
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end Column;
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------------------------
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-- Set_Special_Output --
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------------------------
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procedure Set_Special_Output (P : Output_Proc) is
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begin
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Special_Output_Proc := P;
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end Set_Special_Output;
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------------------------
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-- Set_Standard_Error --
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------------------------
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procedure Set_Standard_Error is
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begin
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if Special_Output_Proc = null then
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Flush_Buffer;
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Next_Column := 1;
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end if;
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Current_FD := Standerr;
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end Set_Standard_Error;
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-------------------------
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-- Set_Standard_Output --
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-------------------------
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procedure Set_Standard_Output is
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begin
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if Special_Output_Proc = null then
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Flush_Buffer;
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Next_Column := 1;
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end if;
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Current_FD := Standout;
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end Set_Standard_Output;
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-------
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-- w --
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-------
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procedure w (C : Character) is
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begin
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Write_Char (''');
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Write_Char (C);
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Write_Char (''');
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Write_Eol;
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end w;
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procedure w (S : String) is
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begin
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Write_Str (S);
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Write_Eol;
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end w;
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procedure w (V : Int) is
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begin
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Write_Int (V);
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Write_Eol;
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end w;
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procedure w (B : Boolean) is
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begin
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if B then
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w ("True");
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else
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w ("False");
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end if;
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end w;
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procedure w (L : String; C : Character) is
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begin
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Write_Str (L);
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Write_Char (' ');
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w (C);
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end w;
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procedure w (L : String; S : String) is
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begin
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Write_Str (L);
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Write_Char (' ');
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w (S);
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end w;
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procedure w (L : String; V : Int) is
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begin
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Write_Str (L);
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Write_Char (' ');
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w (V);
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end w;
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procedure w (L : String; B : Boolean) is
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begin
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Write_Str (L);
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Write_Char (' ');
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w (B);
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end w;
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----------------
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-- Write_Char --
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----------------
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procedure Write_Char (C : Character) is
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begin
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if Next_Column < Buffer'Length then
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Buffer (Natural (Next_Column)) := C;
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Next_Column := Next_Column + 1;
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end if;
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end Write_Char;
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---------------
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-- Write_Eol --
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---------------
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procedure Write_Eol is
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begin
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Buffer (Natural (Next_Column)) := ASCII.LF;
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Next_Column := Next_Column + 1;
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Flush_Buffer;
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end Write_Eol;
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---------------
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-- Write_Int --
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---------------
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procedure Write_Int (Val : Int) is
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begin
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if Val < 0 then
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Write_Char ('-');
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Write_Int (-Val);
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else
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if Val > 9 then
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Write_Int (Val / 10);
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end if;
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Write_Char (Character'Val ((Val mod 10) + Character'Pos ('0')));
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end if;
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end Write_Int;
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----------------
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-- Write_Line --
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----------------
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procedure Write_Line (S : String) is
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begin
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Write_Str (S);
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Write_Eol;
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end Write_Line;
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---------------
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-- Write_Str --
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---------------
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procedure Write_Str (S : String) is
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begin
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for J in S'Range loop
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Write_Char (S (J));
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end loop;
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end Write_Str;
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end Output;
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