kolibrios/programs/develop/oberon07/Source/WRITER.ob07

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(*
BSD 2-Clause License
Copyright (c) 2018, Anton Krotov
All rights reserved.
*)
MODULE WRITER;
IMPORT FILES, ERRORS, MACHINE;
TYPE
FILE* = FILES.FILE;
VAR
counter*: INTEGER;
PROCEDURE align (n, _align: INTEGER): INTEGER;
BEGIN
IF n MOD _align # 0 THEN
n := n + _align - (n MOD _align)
END
RETURN n
END align;
PROCEDURE WriteByte* (file: FILE; n: BYTE);
BEGIN
IF FILES.WriteByte(file, n) THEN
INC(counter)
ELSE
ERRORS.error1("writing file error")
END
END WriteByte;
PROCEDURE Write* (file: FILE; chunk: ARRAY OF BYTE; bytes: INTEGER);
VAR
n: INTEGER;
BEGIN
n := FILES.write(file, chunk, bytes);
IF n # bytes THEN
ERRORS.error1("writing file error")
END;
INC(counter, n)
END Write;
PROCEDURE Write64LE* (file: FILE; n: INTEGER);
VAR
i: INTEGER;
BEGIN
FOR i := 0 TO 7 DO
WriteByte(file, MACHINE.Byte(n, i))
END
END Write64LE;
PROCEDURE Write32LE* (file: FILE; n: INTEGER);
VAR
i: INTEGER;
BEGIN
FOR i := 0 TO 3 DO
WriteByte(file, MACHINE.Byte(n, i))
END
END Write32LE;
PROCEDURE Write16LE* (file: FILE; n: INTEGER);
BEGIN
WriteByte(file, MACHINE.Byte(n, 0));
WriteByte(file, MACHINE.Byte(n, 1))
END Write16LE;
PROCEDURE Padding* (file: FILE; FileAlignment: INTEGER);
VAR
i: INTEGER;
BEGIN
i := align(counter, FileAlignment) - counter;
WHILE i > 0 DO
WriteByte(file, 0);
DEC(i)
END
END Padding;
PROCEDURE Create* (FileName: ARRAY OF CHAR): FILE;
BEGIN
counter := 0
RETURN FILES.create(FileName)
END Create;
PROCEDURE Close* (VAR file: FILE);
BEGIN
FILES.close(file)
END Close;
END WRITER.