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SPACE 1
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SPACE - Library 1 - Volume 1.iso
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356
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defs
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text.def
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1992-03-11
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DEFINITION MODULE Text;
(*
* Copyright (c) 1985, 1986 by
* Djavaheri Bros., Foster City, California.
* All Rights Reserved.
*
* This software is furnished under a license and may be used and copied
* only in accordance with the terms of such license and with the
* inclusion of the above copyright notice. This software or any other
* copies thereof may not be provided or otherwise made available to any
* other person. No title to and ownership of the software is herby
* transferred.
*
* The information in this software is subject to change without notice
* and should not be construed as a commitment by Djavaheri Bros. No
* warranty is implied or expressed.
*
* SCCID = "1.2 9/19/86";
*)
FROM Files IMPORT File, FileState;
EXPORT QUALIFIED
EOL,
ReadChar, ReadLn, ReadString, ReadLine,
UndoRead, CondRead,
WriteChar, WriteString, WriteLn;
PROCEDURE EOL ( file : File)
: BOOLEAN;
(* Returns true if last operation was not performed due to end of line or
error *)
PROCEDURE ReadChar ( file : File;
VAR ch : CHAR;
VAR state : FileState);
(* Read a char from a TextFile. If the file is the standard input file,
then echoing is controlled by Module StandardIO *)
PROCEDURE ReadString(file : File;
VAR str : ARRAY OF CHAR;
VAR state : FileState);
(* Read a string from a text file until EOL, EOF, or end of string *)
PROCEDURE ReadLine(file : File;
VAR str : ARRAY OF CHAR;
VAR state : FileState);
PROCEDURE ReadLn ( file : File;
VAR state : FileState);
(* eat characters (without echo) until EOL, then eat EOL (with echo) *)
PROCEDURE UndoRead( file : File;
VAR state : FileState);
(* allow most recently read CHAR to be read again *)
PROCEDURE CondRead( file : File;
VAR ch : CHAR;
VAR success : BOOLEAN;
VAR state : FileState);
(* attempt to read a char: return TRUE in "success" if read succeeds; return
FALSE in "success" if read fails. If read fails, value in "ch" is
undefined *)
PROCEDURE WriteChar( file : File;
ch : CHAR;
VAR state : FileState);
(* Write a single character to a text file *)
PROCEDURE WriteString(file : File;
VAR str : ARRAY OF CHAR;
VAR state : FileState);
(* Write a string of characters to a text file *)
PROCEDURE WriteLn ( file : File;
VAR state : FileState);
(* Write an EOL to a text file *)
END Text.