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// WALController.h
// Notation
// Created by Zachary Schneirov on 2/5/06.
/*Copyright (c) 2010, Zachary Schneirov. All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted
provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this list of conditions
and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this list of
conditions and the following disclaimer in the documentation and/or other materials provided with
the distribution.
- Neither the name of Notational Velocity nor the names of its contributors may be used to endorse
or promote products derived from this software without specific prior written permission. */
#import <Cocoa/Cocoa.h>
#import "SynchronizedNoteProtocol.h"
#include <sys/types.h>
#include <zlib.h>
#define RECORD_SALT_LEN 32
//each note will have its own key--the "LogSessionKey" salt of master key + per-record salt
typedef union {
struct {
u_int32_t originalDataLength;
u_int32_t dataLength;
u_int32_t checksum;
char saltBuffer[RECORD_SALT_LEN];
char recordBuffer[(sizeof(u_int32_t) * 3) + RECORD_SALT_LEN];
} WALRecordHeader;
@interface WALController : NSObject {
int logFD;
char *journalFile;
NSData *logSessionKey;
id delegate;
z_stream compressionStream;
- (id)initWithParentFSRep:(const char*)path encryptionKey:(NSData*)key;
- (id)delegate;
- (void)setDelegate:(id)aDelegate;
- (BOOL)logFileStillExists;
- (BOOL)destroyLogFile;
@interface WALStorageController : WALController {
NSMutableData *unwrittenData;
- (id)initWithParentFSRep:(const char*)path encryptionKey:(NSData*)key;
- (BOOL)writeEstablishedNote:(id<SynchronizedNote>)aNoteObject;
- (BOOL)writeRemovalForNote:(id<SynchronizedNote>)aNoteObject;
- (BOOL)writeNoteObject:(id<SynchronizedNote>)aNoteObject;
- (void)writeNoteObjects:(NSArray*)notes;
- (BOOL)_attemptToWriteUnwrittenData;
- (BOOL)_encryptAndWriteData:(NSMutableData*)data;
- (BOOL)synchronize;
@interface WALRecoveryController : WALController {
off_t fileLength, totalBytesRead;
//to ensure we don't mistakenly allocate more memory
//than there exists data in what we have yet to read
- (id)initWithParentFSRep:(const char*)path encryptionKey:(NSData*)key;
- (id <SynchronizedNote>)recoverNextObject;
- (NSDictionary*)recoveredNotes;