pad.f File Reference

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Functions/Subroutines
subroutine	pad (IBAY, IBIT, IBYT, IPADB)
	THIS SUBROUTINE FIRST PACKS THE VALUE FOR THE NUMBER OF BITS BEING "PADDED" (WE'LL GET TO THAT LATER), STARTING WITH BIT IBIT+1 AND USING EIGHT BITS IN THE PACKED ARRAY IBAY (WHICH REPRESENTS A SUBSET PACKED INTO IBIT BITS). More...

Detailed Description

Author

WOOLLEN

Date

1994-01-06

Definition in file pad.f.

Function/Subroutine Documentation

subroutine pad	(	dimension(*)	IBAY,
			IBIT,
			IBYT,
			IPADB
	)

THIS SUBROUTINE FIRST PACKS THE VALUE FOR THE NUMBER OF BITS BEING "PADDED" (WE'LL GET TO THAT LATER), STARTING WITH BIT IBIT+1 AND USING EIGHT BITS IN THE PACKED ARRAY IBAY (WHICH REPRESENTS A SUBSET PACKED INTO IBIT BITS).

THEN, STARTING WITH IBIT+9, IT PACKS ZEROES (I.E., "PADS") TO THE SPECIFIED BIT BOUNDARY (IPADB). (NOTE: IT'S THE NUMBER OF BITS PADDED HERE THAT WAS PACKED IN BITS IBIT+1 THROUGH IBIT+8 - THIS IS ACTUALLY A DELAYED REPLICATION FACTOR). IPADB MUST BE A MULTIPLE OF EIGHT AND REPRESENTS THE BIT BOUNDARY ON WHICH THE PACKED SUBSET IN IBAY SHOULD END AFTER PADDING. FOR EXAMPLE, IF IPABD IS "8", THEN THE NUMBER OF BITS IN IBAY ACTUALLY CONSUMED BY PACKED DATA (INCLUDING THE PADDING) WILL BE A MULTIPLE OF EIGHT. IF IPADB IS "16", IT WILL BE A MULTIPLE OF SIXTEEN. IN EITHER (OR ANY) CASE, THIS ENSURES THAT THE PACKED SUBSET WILL ALWAYS END ON A FULL BYTE BOUNDARY.

PROGRAM HISTORY LOG: 1994-01-06 J. WOOLLEN – ORIGINAL AUTHOR 1998-07-08 J. WOOLLEN – REPLACED CALL TO CRAY LIBRARY ROUTINE "ABORT" WITH CALL TO NEW INTERNAL BUFRLIB ROUTINE "BORT" 2003-11-04 S. BENDER – ADDED REMARKS/BUFRLIB ROUTINE INTERDEPENDENCIES 2003-11-04 D. KEYSER – UNIFIED/PORTABLE FOR WRF; ADDED DOCUMENTATION (INCLUDING HISTORY); OUTPUTS MORE COMPLETE DIAGNOSTIC INFO WHEN ROUTINE TERMINATES ABNORMALLY

USAGE: CALL PAD (IBAY, IBIT, IBYT, IPADB) INPUT ARGUMENT LIST: IBAY - INTEGER: *-WORD PACKED BINARY ARRAY NOT YET PADDED IBIT - INTEGER: BIT POINTER WITHIN IBAY TO START PADDING FROM IPADB - INTEGER: BIT BOUNDARY TO PAD TO (MUST BE A MULTIPLE OF 8)

OUTPUT ARGUMENT LIST: IBAY - INTEGER: *-WORD PACKED BINARY ARRAY NOW PADDED IBIT - INTEGER: NUMBER OF BITS WITHIN IBAY CONTAINING PACKED DATA (INCLUDING PADDING, MUST BE A MULTIPLE OF 8) IBYT - INTEGER: NUMBER OF BYTES WITHIN IBAY CONTAINING PACKED DATA (INCLUDING PADDING) (I.E., IBIT/8)

REMARKS: THIS ROUTINE CALLS: BORT PKB THIS ROUTINE IS CALLED BY: MSGUPD Normally not called by any application programs.

Definition at line 52 of file pad.f.

References bort(), and pkb().

Referenced by msgupd().