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CRC32T.cob
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CRC32T.cob
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*============================ CRC32T ============================*
* Authors: Brian D Pead
*
* Description: Program to test subroutine CRC32.
*
* License: MIT
*
* Date Version Description
* ---- ------- -----------
* 2020-02-08 1.0 First release
*================================================================*
PROCESS TRUNC(BIN)
IDENTIFICATION DIVISION.
*========================
PROGRAM-ID. CRC32T.
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-CRC32-PROG PIC X(08) VALUE 'CRC32'.
01 W-HEXDUMP-PROG PIC X(08) VALUE 'HEXDUMP'.
01 W-HEX PIC X(08).
01 W-BUFFER VALUE
'The quick brown fox jumps over the lazy dog'.
05 W-BUFFER-1 PIC X(20).
05 W-BUFFER-2 PIC X(20).
05 W-BUFFER-3 PIC X(03).
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-CRC32-PARAMETER. COPY CRC32L.
01 W-HEXDUMP-PARAMETER. COPY HEXDUMPL.
/
PROCEDURE DIVISION.
*===================
MAIN.
*-----
PERFORM SUB-1000-START-UP THRU SUB-1000-EXIT
PERFORM SUB-2000-PROCESS THRU SUB-2000-EXIT
PERFORM SUB-3000-SHUT-DOWN THRU SUB-3000-EXIT
.
MAIN-EXIT.
STOP RUN.
/
SUB-1000-START-UP.
*------------------
MOVE FUNCTION WHEN-COMPILED
TO W-COMPILED-DATE
DISPLAY 'CRC32T 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
.
SUB-1000-EXIT.
EXIT.
/
SUB-2000-PROCESS.
*-----------------
**** CALCULATE CHECKSUM OF ENTIRE TEXT IN 1 CALL:
SET CRC-STAGE-START-END
TO TRUE
SET CRC-BUFFER-PTR TO ADDRESS OF W-BUFFER
MOVE LENGTH OF W-BUFFER TO CRC-BUFFER-LEN
PERFORM SUB-9100-CALL-CRC32 THRU SUB-9100-EXIT
PERFORM SUB-9200-DISPLAY-HEX THRU SUB-9200-EXIT
**** CALCULATE CHECKSUM OF TEXT IN 3 CHUNKS:
SET CRC-STAGE-START TO TRUE
SET CRC-BUFFER-PTR TO ADDRESS OF W-BUFFER-1
MOVE LENGTH OF W-BUFFER-1
TO CRC-BUFFER-LEN
PERFORM SUB-9100-CALL-CRC32 THRU SUB-9100-EXIT
SET CRC-STAGE-IN-PROCESS
TO TRUE
SET CRC-BUFFER-PTR TO ADDRESS OF W-BUFFER-2
MOVE LENGTH OF W-BUFFER-2
TO CRC-BUFFER-LEN
PERFORM SUB-9100-CALL-CRC32 THRU SUB-9100-EXIT
SET CRC-STAGE-END TO TRUE
SET CRC-BUFFER-PTR TO ADDRESS OF W-BUFFER-3
MOVE LENGTH OF W-BUFFER-3
TO CRC-BUFFER-LEN
PERFORM SUB-9100-CALL-CRC32 THRU SUB-9100-EXIT
PERFORM SUB-9200-DISPLAY-HEX THRU SUB-9200-EXIT
.
SUB-2000-EXIT.
EXIT.
/
SUB-3000-SHUT-DOWN.
*-------------------
DISPLAY 'CRC32T completed'
.
SUB-3000-EXIT.
EXIT.
/
SUB-9100-CALL-CRC32.
*----------------------
CALL W-CRC32-PROG USING W-CRC32-PARAMETER
.
SUB-9100-EXIT.
EXIT.
/
SUB-9200-DISPLAY-HEX.
*---------------------
SET HD-INPUT-PTR TO ADDRESS OF CRC-CHECKSUM
MOVE LENGTH OF CRC-CHECKSUM
TO HD-INPUT-LEN
SET HD-OUTPUT-PTR TO ADDRESS OF W-HEX
CALL W-HEXDUMP-PROG USING W-HEXDUMP-PARAMETER
DISPLAY 'Checksum of '''
W-BUFFER
''' is X'''
W-HEX
''''
.
SUB-9200-EXIT.
EXIT.