| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- O U T P U T -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- $Revision: 1.28 $ |
| -- -- |
| -- Copyright (C) 1992-2001 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 2, 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. See the GNU General Public License -- |
| -- for more details. You should have received a copy of the GNU General -- |
| -- Public License distributed with GNAT; see file COPYING. If not, write -- |
| -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- |
| -- MA 02111-1307, USA. -- |
| -- -- |
| -- As a special exception, if other files instantiate generics from this -- |
| -- unit, or you link this unit with other files to produce an executable, -- |
| -- this unit does not by itself cause the resulting executable to be -- |
| -- covered by the GNU General Public License. This exception does not -- |
| -- however invalidate any other reasons why the executable file might be -- |
| -- covered by the GNU Public License. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This package contains low level output routines used by the compiler |
| -- for writing error messages and informational output. It is also used |
| -- by the debug source file output routines (see Sprintf.Print_Eol). |
| |
| with Types; use Types; |
| |
| package Output is |
| pragma Elaborate_Body (Output); |
| |
| ------------------------- |
| -- Line Buffer Control -- |
| ------------------------- |
| |
| -- Note: the following buffer and column position are maintained by |
| -- the subprograms defined in this package, and are not normally |
| -- directly modified or accessed by a client. However, a client is |
| -- permitted to modify these values, using the knowledge that only |
| -- Write_Eol actually generates any output. |
| |
| Buffer_Max : constant := 8192; |
| Buffer : String (1 .. Buffer_Max + 1); |
| -- Buffer used to build output line. We do line buffering because it |
| -- is needed for the support of the debug-generated-code option (-gnatD). |
| -- Historically it was first added because on VMS, line buffering is |
| -- needed with certain file formats. So in any case line buffering must |
| -- be retained for this purpose, even if other reasons disappear. Note |
| -- any attempt to write more output to a line than can fit in the buffer |
| -- will be silently ignored. |
| |
| Column : Pos range 1 .. Buffer'Length + 1 := 1; |
| -- Column about to be written. |
| |
| ----------------- |
| -- Subprograms -- |
| ----------------- |
| |
| procedure Set_Standard_Error; |
| -- Sets subsequent output to appear on the standard error file (whatever |
| -- that might mean for the host operating system, if anything). |
| |
| procedure Set_Standard_Output; |
| -- Sets subsequent output to appear on the standard output file (whatever |
| -- that might mean for the host operating system, if anything). This is |
| -- the default mode before any call to either of the Set procedures. |
| |
| procedure Write_Char (C : Character); |
| -- Write one character to the standard output file. Note that the |
| -- character should not be LF or CR (use Write_Eol for end of line) |
| |
| procedure Write_Eol; |
| -- Write an end of line (whatever is required by the system in use, |
| -- e.g. CR/LF for DOS, or LF for Unix) to the standard output file. |
| -- This routine also empties the line buffer, actually writing it |
| -- to the file. Note that Write_Eol is the only routine that causes |
| -- any actual output to be written. |
| |
| procedure Write_Int (Val : Int); |
| -- Write an integer value with no leading blanks or zeroes. Negative |
| -- values are preceded by a minus sign). |
| |
| procedure Write_Str (S : String); |
| -- Write a string of characters to the standard output file. Note that |
| -- end of line is handled separately using WRITE_EOL, so the string |
| -- should not contain either of the characters LF or CR, but it may |
| -- contain horizontal tab characters. |
| |
| procedure Write_Line (S : String); |
| -- Equivalent to Write_Str (S) followed by Write_Eol; |
| |
| -------------------------- |
| -- Debugging Procedures -- |
| -------------------------- |
| |
| -- The following procedures are intended only for debugging purposes, |
| -- for temporary insertion into the text in environments where a debugger |
| -- is not available. They all have non-standard very short lower case |
| -- names, precisely to make sure that they are only used for debugging! |
| |
| procedure w (C : Character); |
| -- Dump quote, character quote, followed by line return |
| |
| procedure w (S : String); |
| -- Dump string followed by line return |
| |
| procedure w (V : Int); |
| -- Dump integer followed by line return |
| |
| procedure w (B : Boolean); |
| -- Dump Boolean followed by line return |
| |
| procedure w (L : String; C : Character); |
| -- Dump contents of string followed by blank, quote, character, quote |
| |
| procedure w (L : String; S : String); |
| -- Dump two strings separated by blanks, followed by line return |
| |
| procedure w (L : String; V : Int); |
| -- Dump contents of string followed by blank, integer, line return |
| |
| procedure w (L : String; B : Boolean); |
| -- Dump contents of string followed by blank, Boolean, line return |
| |
| end Output; |
