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(* Output.def redirect output.
Copyright (C) 2021-2023 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Modula-2 is distributed in the hope that it will be useful, but
WITHOUT 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
along with GNU Modula-2; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. *)
DEFINITION MODULE Output ;
(*
Title : Output
Author : Gaius Mulley
System : GNU Modula-2
Date : Fri Jul 9 12:17:35 2021
Revision : $Version$
Description: provides an interface to output redirection for common
output procedures.
*)
FROM NameKey IMPORT Name ;
FROM DynamicStrings IMPORT String ;
(*
Open - attempt to open filename as the output file.
TRUE is returned if success, FALSE otherwise.
*)
PROCEDURE Open (filename: ARRAY OF CHAR) : BOOLEAN ;
(*
Close - close the output file.
*)
PROCEDURE Close ;
(*
Write - write a single character to the output file.
*)
PROCEDURE Write (ch: CHAR) ;
(*
WriteString - write an unformatted string to the output.
*)
PROCEDURE WriteString (s: ARRAY OF CHAR) ;
(*
KillWriteS - write a string to the output and free the string afterwards.
*)
PROCEDURE KillWriteS (s: String) ;
(*
WriteS - write a string to the output. The string is not freed.
*)
PROCEDURE WriteS (s: String) ;
(*
WriteKey - write a key to the output.
*)
PROCEDURE WriteKey (key: Name) ;
(*
WriteLn - write a newline to the output.
*)
PROCEDURE WriteLn ;
(*
WriteCard - write a cardinal using fieldlength characters.
*)
PROCEDURE WriteCard (card, fieldlength: CARDINAL) ;
(*
StartBuffer - create a buffer into which any output is redirected.
*)
PROCEDURE StartBuffer ;
(*
EndBuffer - end the redirection and return the contents of the buffer.
*)
PROCEDURE EndBuffer () : String ;
END Output.
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