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FAKRAND.cob
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FAKRAND.cob
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*========================== COB-FAKER ===========================*
* Authors: Brian D Pead
*
* License: MIT
*
* Date Version Description
* ---- ------- -----------
* 2020-02-08 1.0 First release
*================================================================*
IDENTIFICATION DIVISION.
*========================
PROGRAM-ID. FAKRAND.
ENVIRONMENT DIVISION.
*=====================
CONFIGURATION SECTION.
*----------------------
SOURCE-COMPUTER.
IBM-Z15.
* IBM-Z15 DEBUGGING MODE.
INPUT-OUTPUT SECTION.
*---------------------
FILE-CONTROL.
/
DATA DIVISION.
*==============
FILE SECTION.
*-------------
WORKING-STORAGE SECTION.
*------------------------
01 W-MAX-SEED-NO PIC 9(9) COMP VALUE 2147483645.
01 W-SEED-NO PIC 9(9) COMP.
01 W-RANDOM-NO PIC V9(9) COMP.
01 W-SUB PIC S9(04) COMP.
01 W-CRC32-PROG PIC X(08) VALUE 'CRC32'.
01 FILLER PIC X(01) VALUE 'Y'.
88 W-FIRST-CALL VALUE 'Y'.
88 W-NOT-FIRST-CALL VALUE 'N'.
01 W-COMPILED-DATE.
05 W-COMPILED-DATE-YYYY
PIC X(04).
05 W-COMPILED-DATE-MM PIC X(02).
05 W-COMPILED-DATE-DD PIC X(02).
05 W-COMPILED-TIME-HH PIC X(02).
05 W-COMPILED-TIME-MM PIC X(02).
05 W-COMPILED-TIME-SS PIC X(02).
05 FILLER PIC X(07).
01 W-CURRENT-DATE.
05 W-CURRENT-YYYY-MM-DD
PIC 9(08).
05 W-CURRENT-HH-MM-SS-HS
PIC 9(08).
05 FILLER PIC X(05).
01 W-CRC32-PARAMETER. COPY CRC32L.
/
LINKAGE SECTION.
*----------------
01 L-PARAMETER. COPY FAKRANDL.
/
PROCEDURE DIVISION USING L-PARAMETER.
*==================
MAIN.
*-----
PERFORM SUB-1000-START-UP THRU SUB-1000-EXIT
PERFORM SUB-2000-PROCESS THRU SUB-2000-EXIT
.
MAIN-EXIT.
GOBACK.
/
SUB-1000-START-UP.
*------------------
IF W-NOT-FIRST-CALL
GO TO SUB-1000-EXIT
END-IF
SET W-NOT-FIRST-CALL TO TRUE
MOVE FUNCTION WHEN-COMPILED
TO W-COMPILED-DATE
DISPLAY 'FAKRAND compiled on '
W-COMPILED-DATE-YYYY '/'
W-COMPILED-DATE-MM '/'
W-COMPILED-DATE-DD ' at '
W-COMPILED-TIME-HH ':'
W-COMPILED-TIME-MM ':'
W-COMPILED-TIME-SS
MOVE FUNCTION CURRENT-DATE
TO W-CURRENT-DATE
COMPUTE W-RANDOM-NO = FUNCTION RANDOM(W-CURRENT-HH-MM-SS-HS)
* 999999999
.
SUB-1000-EXIT.
EXIT.
/
SUB-2000-PROCESS.
*-----------------
MOVE 0 TO W-SEED-NO
EVALUATE TRUE
WHEN FAKRAND-SEED-NO > 0
MOVE FAKRAND-SEED-NO
TO W-SEED-NO
WHEN FAKRAND-SEED-TEXT NOT = SPACES
PERFORM SUB-2100-HASH-SEED-TEXT THRU SUB-2100-EXIT
END-EVALUATE
IF W-SEED-NO = 0
MOVE FUNCTION RANDOM
TO FAKRAND-RANDOM-NO
ELSE
MOVE FUNCTION RANDOM(W-SEED-NO)
TO FAKRAND-RANDOM-NO
END-IF
MOVE 0 TO FAKRAND-SEED-NO
MOVE SPACES TO FAKRAND-SEED-TEXT
.
SUB-2000-EXIT.
EXIT.
/
SUB-2100-HASH-SEED-TEXT.
*------------------------
SET CRC-STAGE-START-END
TO TRUE
SET CRC-BUFFER-PTR TO ADDRESS OF FAKRAND-SEED-TEXT
PERFORM VARYING CRC-BUFFER-LEN
FROM LENGTH OF FAKRAND-SEED-TEXT
BY -1
UNTIL FAKRAND-SEED-TEXT(CRC-BUFFER-LEN : 1)
NOT = SPACE
CONTINUE
END-PERFORM
CALL W-CRC32-PROG USING W-CRC32-PARAMETER
MOVE CRC-CHECKSUM TO W-SEED-NO
IF W-SEED-NO > W-MAX-SEED-NO
SUBTRACT W-MAX-SEED-NO
FROM W-SEED-NO
END-IF
D DISPLAY 'FAKRAND hashed seed of '''
D FAKRAND-SEED-TEXT(1 : CRC-BUFFER-LEN)
D ''' is '
D W-SEED-NO
.
SUB-2100-EXIT.
EXIT.