$save nolist

/*
 *============================================================================
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
 *
 *  Permission to use for any purpose, modify, copy, and make enhancements
 *  and derivative works of the software is granted if attribution is given to
 *  R.M. Gillmore, dba the ACME Software Deli, as the author
 *
 *  While the ACME Software Deli does not work for money, there is nonetheless
 *  a significant amount of work involved.  The ACME Software Deli maintains the
 *  rights to all code written, though it may be used and distributed as long as
 *  the following conditions are maintained.
 *
 *  1.  The copyright statement at the top of each code block is maintained in
 *      your distribution.
 *  2.  You do not identify yourself as the ACME Software Deli
 *  3.  Any changes made to the software are sent to the ACME Software Deli
 *============================================================================
 */

/*
 *	$Id: mem4Edit.ext 1157 2025-05-05 00:35:39Z rmgillmore $
 */

$if not MEMORY_MGR_4_EDITOR_INCLUDED
$set( MEMORY_MGR_4_EDITOR_INCLUDED )

/*	just so the math works out nicely, each line will be a maximum of 114 char.
 *	the remainder of the 128 bytes in a line are the items in the header
 *	structure, including the linked list (prevLine/nextLine) and the address
 *	of the next buffer in the memory chain
 */

declare	MAX_LINE_LENGTH			literally	'125';

/*
 *	the contents of a line is limited (as defined herein) to MAX_LINE_LENGTH
 *	bytes.  Doing the math:
 *		MAX_LINE_LENGTH + size( currentLength ) + size( NUL ) is 128 bytes
 *	a perfect value to yield the maximum number of blocks
 */

/*
 *	in a lineRecord_t structure, the following are allocated for use:
 *
 *	*	nextBuffer is used in the line record managers defined herein
 *	*	prevLinePtr, nextLinePtr are going to be used in the editor
 *		as part of the doubly-linked list of line contents
 *	*	lineContent is what the user will work with
 *	*	currentLength is the index to the last defined element in the
 *		lineContent array
 */

declare	lineRecord_t			literally	'structure
	(
		currentLength	word,
		lineContent		( MAX_LINE_LENGTH ) char
	)';


$if not MEM_MGR_4_EDIT_IMPLEMENTATION

allocateLineRecord:
procedure ( lineNumber ) pointer external;
	declare	lineNumber			integer;
end allocateLineRecord;

getLineRecord:
procedure ( lineNumber ) pointer external;
	declare	lineNumber			integer;
end getLineRecord;

returnLineRecord:
procedure ( recordPtr ) external;
	declare	recordPtr			pointer;
end returnLineRecord;

clearLineRecords:
procedure external;
end clearLineRecords;

$endif
$endif
$restore