112 lines
1.7 KiB
Plaintext
112 lines
1.7 KiB
Plaintext
(*
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BSD 2-Clause License
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Copyright (c) 2018-2019, Anton Krotov
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All rights reserved.
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*)
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MODULE WRITER;
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IMPORT FILES, ERRORS, UTILS;
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TYPE
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FILE* = FILES.FILE;
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VAR
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counter*: INTEGER;
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PROCEDURE align (n, _align: INTEGER): INTEGER;
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BEGIN
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IF n MOD _align # 0 THEN
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n := n + _align - (n MOD _align)
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END
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RETURN n
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END align;
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PROCEDURE WriteByte* (file: FILE; n: BYTE);
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BEGIN
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IF FILES.WriteByte(file, n) THEN
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INC(counter)
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ELSE
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ERRORS.Error(201)
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END
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END WriteByte;
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PROCEDURE Write* (file: FILE; chunk: ARRAY OF BYTE; bytes: INTEGER);
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VAR
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n: INTEGER;
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BEGIN
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n := FILES.write(file, chunk, bytes);
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IF n # bytes THEN
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ERRORS.Error(201)
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END;
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INC(counter, n)
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END Write;
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PROCEDURE Write64LE* (file: FILE; n: INTEGER);
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VAR
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i: INTEGER;
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BEGIN
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FOR i := 0 TO 7 DO
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WriteByte(file, UTILS.Byte(n, i))
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END
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END Write64LE;
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PROCEDURE Write32LE* (file: FILE; n: INTEGER);
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VAR
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i: INTEGER;
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BEGIN
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FOR i := 0 TO 3 DO
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WriteByte(file, UTILS.Byte(n, i))
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END
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END Write32LE;
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PROCEDURE Write16LE* (file: FILE; n: INTEGER);
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BEGIN
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WriteByte(file, UTILS.Byte(n, 0));
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WriteByte(file, UTILS.Byte(n, 1))
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END Write16LE;
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PROCEDURE Padding* (file: FILE; FileAlignment: INTEGER);
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VAR
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i: INTEGER;
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BEGIN
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i := align(counter, FileAlignment) - counter;
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WHILE i > 0 DO
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WriteByte(file, 0);
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DEC(i)
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END
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END Padding;
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PROCEDURE Create* (FileName: ARRAY OF CHAR): FILE;
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BEGIN
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counter := 0
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RETURN FILES.create(FileName)
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END Create;
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PROCEDURE Close* (VAR file: FILE);
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BEGIN
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FILES.close(file)
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END Close;
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END WRITER.
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