Enter your search terms Submit search form
	Web pdp-10.trailing-edge.com

 %TITLE 'LDELETE - delete lines'
MODULE LDELETE (				! Delete lines
		IDENT = '3-001'			! File: LDELETE.BLI Edit: CJG3001
		) =
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:
!
!	This module executes the line mode DELETE command.
!	It also provides the delete part of the REPLACE command.
!
! ENVIRONMENT:	Runs at any access mode - AST reentrant
!
! AUTHOR: Bob Kushlis, CREATION DATE: February 3, 1978
!
! MODIFIED BY:
!
! 1-001	- Original.  DJS 30-JAN-81.  This module was created by
!	extracting the routines DELETE and DEL_COM from EXEC.BLI.
! 1-002	- Regularize headers.  JBS 19-Mar-1981
! 1-003	- Change DEL_COM to EDT$$DEL_CMD .  JBS 30-Mar-1981
! 1-004 - Change count to 48-bits.  SMB 05-Feb-1982
! 1-005 - Stop processing on bad select range.  SMB 01-Jul-1982
! 1-006	- Use EDT$$FMT_CRLF instead of EDT$$OUT_FMTBUF.  JBS 05-Jul-1982
! 1-007	- After deleting a line, make sure the character offset is 0.
!	   Bug reported in SPR 11-47685.  JBS 14-Jul-1982
! 1-008	- Suppress typing out the current line in EXT mode.  JBS 15-Jul-1982
! 1-009	- New screen update logic.  JBS 13-Sep-1982
! 1-010 - Modify to use new 48 bit arith macros. STS 01-Oct-1982
! 1-011 - Put code for ranpos in line. STS 11-Oct-1982
! 1-012 - Modify to use new compare macro. STS 20-Oct-1982
! 3-001 - Fix EDT$$FMT_STR and EDT$$FMT_STRCNT. CJG 22-Mar-1983
!--

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

REQUIRE 'EDTSRC:TRAROUNAM';

FORWARD ROUTINE
    EDT$$DEL_LNS,				! Delete a range of lines
    EDT$$DEL_CMD : NOVALUE;			! Process the DELETE command

!
! INCLUDE FILES:
!

REQUIRE 'EDTSRC:EDTREQ';

!
! MACROS:
!
!	NONE
!
! EQUATED SYMBOLS:
!
!	NONE
!
! OWN STORAGE:
!
!	NONE
!
! EXTERNAL REFERENCES:
!
!	In the routine

%SBTTL 'EDT$$DEL_LNS  - delete a range of lines'

GLOBAL ROUTINE EDT$$DEL_LNS 			! Delete a range of lines
    =

!++
! FUNCTIONAL DESCRIPTION:
!
!	This routine is used by DELETE and REPLACE to delete a range of lines.
!	We process through the range, checking for /QUERY before deleting each
!	line.  When we are done a message indicating the number of lines
!	deleted is displayed.
!
! FORMAL PARAMETERS:
!
!	NONE
!
! IMPLICIT INPUTS:
!
!	EXE_CURCMD
!	EXE_QRYQUIT
!
! IMPLICIT OUTPUTS:
!
!	NONE
!
! ROUTINE VALUE:
!
!	1 = at least one line was deleted
!	0 = no lines were deleted
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN

    EXTERNAL ROUTINE
	EDT$$CMP_LNO,
	EDT$$FMT_STRCNT : NOVALUE,
	EDT$$FMT_CRLF,				! Terminate an output line
    	EDT$$RNG_REPOS,
	EDT$$FMT_STR,
	EDT$$PROC_QRYQAL,
	EDT$$NXT_LNRNG,
	EDT$$DEL_CURLN,
	EDT$$RD_NXTLN;

    EXTERNAL
	LNO_ZERO : LN_BLOCK,
	LNO0 : LN_BLOCK,
	EXE_CURCMD : REF NODE_BLOCK,	! Pointer to the current command.
    	RNG_FRSTLN,
    	RNG_ORIGPOS : POS_BLOCK,
	EXE_QRYQUIT,			! Quit flag for /QUERY operations.
	CUR_BUF : REF POS_BLOCK,		! The current editing position

	EXT_MOD;				! 1 = we are under the EXT command

    LOCAL
	NUM_DELETED : LN_BLOCK;

    NUM_DELETED [LN_LO] = .LNO_ZERO [LN_LO];
    NUM_DELETED [LN_MD] = .LNO_ZERO [LN_MD];
    NUM_DELETED [LN_HI] = .LNO_ZERO [LN_HI];
!+
! Position to the first line in the range.
!-

    RNG_FRSTLN = 1;
    EDT$$CPY_MEM(POS_SIZE, .CUR_BUF, RNG_ORIGPOS);
    IF ( NOT EDT$$RNG_REPOS (.EXE_CURCMD [RANGE1])) THEN RETURN (0);

!+
! Loop until the end of the range, or the user typed 'Q' in response to
! a /QUERY prompt.  If we delete a line, make sure the cursor position
! is at 0 on the new line, so we don't skip the text of the next line
! if we start a search.
!-

    WHILE (EDT$$NXT_LNRNG (1) AND ( NOT .EXE_QRYQUIT)) DO

	IF EDT$$PROC_QRYQAL (0, 0)
	THEN
	    BEGIN
	    ADDLINE (LNO0, NUM_DELETED, NUM_DELETED);
	    CUR_BUF [POS_CHAR_POS] = 0;
	    EDT$$DEL_CURLN ();

	    END
	ELSE
	    EDT$$RD_NXTLN ();

!+
! Display message about the count.
!-
    EDT$$FMT_STRCNT (NUM_DELETED, CH$PTR (UPLIT (' line')), 5);
    EDT$$FMT_STR (CH$PTR (UPLIT (' deleted')), 8);
    EDT$$FMT_CRLF ();
    RETURN (EDT$$CMP_LNO (NUM_DELETED, LNO_ZERO) NEQ 0);
    END;					! of routine EDT$$DEL_LNS

%SBTTL 'EDT$$DEL_CMD  - DELETE line-mode command'

GLOBAL ROUTINE EDT$$DEL_CMD 			! DELETE line-mode command
    : NOVALUE =

!++
! FUNCTIONAL DESCRIPTION:
!
!	Command processing routine for DELETE.   All the work is done by the EDT$$DEL_LNS  routine.
!	When it is done, display the current line after the deletions.
!
! FORMAL PARAMETERS:
!
!	NONE
!
! IMPLICIT INPUTS:
!
!	INP_SRC
!
! IMPLICIT OUTPUTS:
!
!	NONE
!
! ROUTINE VALUE:
!
!	NONE
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN

    EXTERNAL ROUTINE
	EDT$$TY_CURLN;

    EXTERNAL
	INP_SRC,
	EXT_MOD;

    EDT$$DEL_LNS ();

    IF ((.INP_SRC EQL INP_TERM) AND ( NOT .EXT_MOD)) THEN EDT$$TY_CURLN ();

    END;					! of routine EDT$$DEL_CMD

END						! of module EDT$LDELETE

ELUDOM