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Trailing-Edge - PDP-10 Archives - tops20-v7-ft-dist1-clock - 7-sources/fdec.bli
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 %TITLE 'FDEC - format a decimal number'
MODULE FDEC (				! Format a decimal number
		IDENT = '1-005'			! File: FDEC.BLI Edit: GB1005
		) =
BEGIN
!COPYRIGHT (c) DIGITAL EQUIPMENT CORPORATION 1981, 1988.  ALL RIGHTS RESERVED.
!
!THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND COPIED ONLY
!IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE AND WITH THE INCLUSION OF 
!THE ABOVE COPYRIGHT NOTICE.  THIS SOFTWARE OR ANY OTHER COPIES THEREOF MAY 
!NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY OTHER PERSON.  NO TITLE
!TO AND OWNERSHIP OF THE SOFTWARE IS HEREBY TRANSFERRED.
!
!THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT NOTICE AND 
!SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL EQUIPMENT CORPORATION.
!
!DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF ITS 
!SOFTWARE ON EQUIPMENT THAT IS NOT SUPPLIED BY DIGITAL.
!
!
!++
! FACILITY:	EDT -- The DEC Standard Editor
!
! ABSTRACT:
!
!	Format a decimal number.
!
! ENVIRONMENT:	Runs at any access mode - AST reentrant
!
! AUTHOR: Bob Kushlis, CREATION DATE: March 18, 1979
!
! MODIFIED BY:
!
! 1-001	- Original.  DJS 19-FEB-1981.  This module was created by
!	extracting routine EDT$$FMT_DCML  from module FORMAT.
! 1-002	- Regularize headers.  JBS 05-Mar-1981
! 1-003	- Rewrite to use recursion.  This saves 17 words over version 1-002
!	   on the PDP-11.  JBS 05-Mar-1981
! 1-004	- Correct infinite recursion.  JBS 02-Apr-1981
! 1-005 - Make arguments to FMT_CH consistent ie right justified.  GB 14-Feb-1983
!--

%SBTTL 'Declarations'
!
! TABLE OF CONTENTS:
!

REQUIRE 'EDTSRC:TRAROUNAM';

FORWARD ROUTINE
    EDT$$FMT_DCML : NOVALUE;

!
! INCLUDE FILES:
!

REQUIRE 'EDTSRC:EDTREQ';

!
! MACROS:
!
!	NONE
!
! EQUATED SYMBOLS:
!
!	NONE
!
! OWN STORAGE:
!
!	NONE
!
! EXTERNAL REFERENCES:
!
!	In the routine
%SBTTL 'EDT$$FMT_DCML  - format a decimal number'

GLOBAL ROUTINE EDT$$FMT_DCML (			! Format a decimal number
	N					! The number to format
    ) : NOVALUE =

!++
! FUNCTIONAL DESCRIPTION:
!
!	Convert a decimal number to displayable ascii in the format buffer.
!	The number is written with a leading minus and leading zeros suppressed.
!
! FORMAL PARAMETERS:
!
!	N		The number to write out.
!
! IMPLICIT INPUTS:
!
!	NONE
!
! IMPLICIT OUTPUTS:
!
!	NONE
!
! ROUTINE VALUE:
!
!	NONE
!
! SIDE EFFECTS:
!
!	Calls itself for large numbers.
!
!--

    BEGIN

    EXTERNAL ROUTINE
	EDT$$FMT_CH : NOVALUE;

    LOCAL
	POSITIVE_N;

!+
! See if we should put out a minus.
!-

    IF (.N LSS 0)
    THEN
	BEGIN
	EDT$$FMT_CH (%C'-');
	POSITIVE_N = -.N;
	END
    ELSE
	POSITIVE_N = .N;

!+
! If the number is greater than or equal to 10, print
! the leading digits first.
!-

    IF (.POSITIVE_N GEQ 10) THEN EDT$$FMT_DCML (.POSITIVE_N/10);

!+
! Now print the low-order (last) digit.
!-
    EDT$$FMT_CH ((.POSITIVE_N MOD 10) + %C'0');
    END;


END
ELUDOM