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

 %TITLE 'CHMGSUSTR - isolate the search and replace strings'
MODULE CHMGSUSTR (				! Isolate the search and replace strings
		IDENT = '3-002'			! File: CHMGSUSTR.BLI Edit: CJG3002
		) =
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 isolates the search and replace strings for the
!	SUBSTITUTE command.
!
! ENVIRONMENT:	Runs at any access mode - AST reentrant
!
! AUTHOR: Bob Kushlis, CREATION DATE: Unknown
!
! MODIFIED BY:
!
! 1-001	- Original.  DJS 04-Feb-1981.  This module was created by
!	extracting the routine EDT$$FND_SUBSTR  from module CHANGE.BLI.
! 1-002	- Regularize header.  JBS 02-Mar-1981
! 3-001 - Fix up for TPS-20. CJG 7-Oct-1983
! 3-002 - Add code to cope with delimiters of the form '^char'. GB 14-Oct-1983
!--

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

REQUIRE 'EDTSRC:TRAROUNAM';

FORWARD ROUTINE
    EDT$$FND_SUBSTR : NOVALUE;		! Isolate the search and replace strings for the SUBSTITUTE command

!
! INCLUDE FILES:
!

REQUIRE 'EDTSRC:EDTREQ';

!
! MACROS:
!
!	NONE
!
! EQUATED SYMBOLS:
!
!	NONE
!
! OWN STORAGE:
!
!	NONE
!
! EXTERNAL REFERENCES:
!
!	In the routine
%SBTTL 'EDT$$FND_SUBSTR  - isolate the search and replace strings'

GLOBAL ROUTINE EDT$$FND_SUBSTR 			! Isolate the search and replace strings
    : NOVALUE =

!++
! FUNCTIONAL DESCRIPTION:
!
!	This routine isolates the search and replace strings for the SUBSTITUTE
!	command.
!
!	The length and address of the search and replace strings respectively
!	are placed in the global variables: SEA_LEN ,
!	SEA_PTR , RPL_LEN  and RPL_STR .
!
!	The command line pointer CMD_PTR is left pointing 1 character beyond the
!	command.
!
! FORMAL PARAMETERS:
!
!	NONE
!
! IMPLICIT INPUTS:
!
!	CMD_END
!	CMD_PTR
!
! IMPLICIT OUTPUTS:
!
!	CMD_PTR
!	RPL_STR
!	RPL_LEN
!	SEA_PTR
!	SEA_LEN
!
! ROUTINE VALUE:
!
!	NONE
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN

    EXTERNAL
	CMD_PTR,					! Pointer into MD_BUF
	CMD_END,				! End of command pointer
	RPL_STR,				! Address of replace string.
	RPL_LEN,				! Length of replace string.
	SEA_PTR,				! Address of search string.
	SEA_LEN;				! Length of search string.

    LOCAL
	C,
	QUOTE,
	R_ADDR,
	R_LEN;

    QUOTE = CH$RCHAR_A (CMD_PTR);
    IF (.QUOTE EQL %C'^') THEN QUOTE = CH$RCHAR_A (CMD_PTR) - %O'100';
    SEA_PTR = .CMD_PTR;
    SEA_LEN = 0;

    WHILE (CH$PTR_GTR (.CMD_END, .CMD_PTR)) DO
	BEGIN
	C = CH$RCHAR_A (CMD_PTR);
	IF (.C EQL %C'^') THEN C = CH$RCHAR_A (CMD_PTR) - %O'100';
	IF (.C EQL .QUOTE) THEN EXITLOOP;
	SEA_LEN = .SEA_LEN + 1;
	END;

    RPL_STR = .CMD_PTR;
    RPL_LEN = 0;

    WHILE (CH$PTR_GTR (.CMD_END, .CMD_PTR)) DO
	BEGIN
	C = CH$RCHAR_A (CMD_PTR);
	IF (.C EQL %C'^') THEN C = CH$RCHAR_A (CMD_PTR) - %O'100';
	IF (.C EQL .QUOTE) THEN EXITLOOP;
	RPL_LEN = .RPL_LEN + 1;
	END;

    END;


END
ELUDOM