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Modula Definition | 1989-01-09 | 2.8 KB | 82 lines |
- DEFINITION MODULE Text;
-
-
- (*
- * Copyright (c) 1985,1986,1987,1988,1989 by
- * ana-systems, 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 ana-systems. 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.
-