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Modula Definition | 1989-01-09 | 2.4 KB | 60 lines |
- DEFINITION MODULE FilePositions;
-
- (*
- * 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 = "1.1 1/26/86";
- *)
- (* May be used for Text or Binary files, but mixed mode usage is very
- non-portable *)
-
- FROM Files IMPORT File, FileState, FilePosition;
-
- EXPORT QUALIFIED
- GetFilePos, SetFilePos,
- CalcFilePos, GetEOF, GetBOF;
-
- PROCEDURE GetFilePos ( file : File;
- VAR pos : FilePosition);
- (* returns the current position in the file *)
-
- PROCEDURE GetEOF ( file : File;
- VAR pos : FilePosition);
- (* returns a FilePosition of the current end of the file *)
-
- PROCEDURE GetBOF ( file : File;
- VAR pos : FilePosition);
- (* returns a FilePosition of the beginning of the file *)
-
- PROCEDURE CalcFilePos ( file : File;
- VAR pos : FilePosition;
- numOfElements : INTEGER;
- elementLength : CARDINAL);
- (* ADDRESSINC); elementLength should be of this type .. fix it later. SRO *)
- (* Calculate a file position relative to FilePos, offset by NumOfElements.
- Return the resulting position in FilePos *)
- (* Note: A program which calls this procedure passing a file which was
- Opened/Created as textMode is probably not portable *)
-
- PROCEDURE SetFilePos ( file : File;
- pos : FilePosition;
- VAR state : FileState);
- (* positions the file as specified. illegal position leaves the file
- as it was before the call and returns a bad state *)
-
- END FilePositions.
- (*
-