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/* DBKVarLenRecordsFile.h
*
* Copyright (C) 2005 Free Software Foundation, Inc.
*
* Author: Enrico Sersale <enrico@imago.ro>
* Date: June 2005
*
* This file is part of the GNUstep GWorkspace application
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 31 Milk Street #960789 Boston, MA 02196 USA.
*/
#ifndef DBK_VAR_LEN_RECORDS_FILE_H
#define DBK_VAR_LEN_RECORDS_FILE_H
#include <Foundation/Foundation.h>
#include "DBKBTree.h"
@class DBKBFreeNodeEntry;
@interface DBKVarLenRecordsFile: NSObject <DBKBTreeDelegate>
{
NSMutableDictionary *cacheDict;
NSMutableArray *offsets;
NSFileHandle *handle;
unsigned long eof;
unsigned maxlen;
BOOL autoflush;
DBKBTree *freeOffsetsTree;
unsigned ulen;
unsigned llen;
}
- (id)initWithPath:(NSString *)path
cacheLength:(unsigned)len;
- (void)setAutoflush:(BOOL)value;
- (BOOL)autoflush;
- (void)flushIfNeeded;
- (void)flush;
- (NSData *)dataAtOffset:(NSNumber *)offset;
- (NSNumber *)writeData:(NSData *)data;
- (void)writeData:(NSData *)data
atOffset:(NSNumber *)offset;
- (void)deleteDataAtOffset:(NSNumber *)offset;
- (NSNumber *)offsetForNewData:(NSData *)data;
- (int)insertionIndexForOffset:(NSNumber *)offset;
- (NSNumber *)freeOffsetForData:(NSData *)data;
@end
@interface DBKBFreeNodeEntry: NSObject
{
NSNumber *lengthNum;
NSNumber *offsetNum;
}
+ (id)entryWithLength:(unsigned long)len
atOffset:(unsigned long)ofst;
- (id)initWithLength:(unsigned long)len
atOffset:(unsigned long)ofst;
- (NSNumber *)lengthNum;
- (unsigned long)length;
- (NSNumber *)offsetNum;
- (unsigned long)offset;
@end
#endif // DBK_VAR_LEN_RECORDS_FILE_H
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