117 lines
1.9 KiB
Plaintext
117 lines
1.9 KiB
Plaintext
(*
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BSD 2-Clause License
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Copyright (c) 2020, Anton Krotov
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All rights reserved.
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*)
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MODULE HEX;
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IMPORT WRITER, CHL := CHUNKLISTS, UTILS;
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VAR
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chksum: INTEGER;
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PROCEDURE Byte (byte: BYTE);
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BEGIN
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WRITER.WriteByte(UTILS.hexdgt(byte DIV 16));
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WRITER.WriteByte(UTILS.hexdgt(byte MOD 16));
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INC(chksum, byte)
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END Byte;
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PROCEDURE Byte4 (a, b, c, d: BYTE);
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BEGIN
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Byte(a);
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Byte(b);
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Byte(c);
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Byte(d)
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END Byte4;
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PROCEDURE NewLine;
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BEGIN
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Byte((-chksum) MOD 256);
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chksum := 0;
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WRITER.WriteByte(0DH);
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WRITER.WriteByte(0AH)
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END NewLine;
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PROCEDURE StartCode;
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BEGIN
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WRITER.WriteByte(ORD(":"));
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chksum := 0
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END StartCode;
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PROCEDURE Data* (mem: ARRAY OF BYTE; idx, cnt: INTEGER);
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VAR
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i, len: INTEGER;
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BEGIN
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WHILE cnt > 0 DO
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len := MIN(cnt, 16);
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StartCode;
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Byte4(len, idx DIV 256, idx MOD 256, 0);
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FOR i := 1 TO len DO
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Byte(mem[idx]);
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INC(idx)
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END;
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DEC(cnt, len);
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NewLine
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END
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END Data;
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PROCEDURE ExtLA* (LA: INTEGER);
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BEGIN
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ASSERT((0 <= LA) & (LA <= 0FFFFH));
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StartCode;
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Byte4(2, 0, 0, 4);
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Byte(LA DIV 256);
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Byte(LA MOD 256);
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NewLine
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END ExtLA;
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PROCEDURE Data2* (mem: CHL.BYTELIST; idx, cnt, LA: INTEGER);
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VAR
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i, len, offset: INTEGER;
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BEGIN
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ExtLA(LA);
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offset := 0;
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WHILE cnt > 0 DO
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ASSERT(offset <= 65536);
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IF offset = 65536 THEN
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INC(LA);
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ExtLA(LA);
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offset := 0
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END;
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len := MIN(cnt, 16);
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StartCode;
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Byte4(len, offset DIV 256, offset MOD 256, 0);
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FOR i := 1 TO len DO
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Byte(CHL.GetByte(mem, idx));
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INC(idx);
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INC(offset)
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END;
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DEC(cnt, len);
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NewLine
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END
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END Data2;
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PROCEDURE End*;
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BEGIN
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StartCode;
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Byte4(0, 0, 0, 1);
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NewLine
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END End;
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END HEX. |