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/*
Miranda IM: the free IM client for Microsoft* Windows*
Copyright 2000-2005 Miranda ICQ/IM project,
all portions of this codebase are copyrighted to the people
listed in contributors.txt.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
//all offsets are relative to the start of the file
//offsets are 0 if there is nothing in the chain or this is the last in the
//chain
/* tree diagram
DBHeader
|-->end of file (plain offset)
|-->first contact (DBContact)
| |-->next contact (DBContact)
| | \--> ...
| |-->first settings (DBContactSettings)
| | |-->next settings (DBContactSettings)
| | | \--> ...
| | \-->module name (DBModuleName)
| \-->first/last/firstunread event
|-->user contact (DBContact)
| |-->next contact=NULL
| |-->first settings as above
| \-->first/last/firstunread event as above
\-->first module name (DBModuleName)
\-->next module name (DBModuleName)
\--> ...
*/
#define DB_RESIZE_GRANULARITY 16384
#define DB_THIS_VERSION 0x00000700u
#define DB_SETTINGS_RESIZE_GRANULARITY 128
#include <pshpack1.h>
struct DBHeader {
BYTE signature[16]; // 'Miranda ICQ DB',0,26
DWORD version; //as 4 bytes, ie 1.2.3.10=0x0102030a
//this version is 0x00000700
DWORD ofsFileEnd; //offset of the end of the database - place to write
//new structures
DWORD slackSpace; //a counter of the number of bytes that have been
//wasted so far due to deleting structures and/or
//re-making them at the end. We should compact when
//this gets above a threshold
DWORD contactCount; //number of contacts in the chain,excluding the user
DWORD ofsFirstContact; //offset to first struct DBContact in the chain
DWORD ofsUser; //offset to struct DBContact representing the user
DWORD ofsFirstModuleName; //offset to first struct DBModuleName in the chain
};
#define DBCONTACT_SIGNATURE 0x43DECADEu
struct DBContact {
DWORD signature;
DWORD ofsNext; //offset to the next contact in the chain. zero if
//this is the 'user' contact or the last contact
//in the chain
DWORD ofsFirstSettings; //offset to the first DBContactSettings in the
//chain for this contact.
DWORD eventCount; //number of events in the chain for this contact
DWORD ofsFirstEvent,ofsLastEvent; //offsets to the first and last DBEvent in
//the chain for this contact
DWORD ofsFirstUnreadEvent; //offset to the first (chronological) unread event
//in the chain, 0 if all are read
DWORD timestampFirstUnread; //timestamp of the event at ofsFirstUnreadEvent
};
#define DBMODULENAME_SIGNATURE 0x4DDECADEu
struct DBModuleName {
DWORD signature;
DWORD ofsNext; //offset to the next module name in the chain
BYTE cbName; //number of characters in this module name
char name[1]; //name, no nul terminator
};
#define DBCONTACTSETTINGS_SIGNATURE 0x53DECADEu
struct DBContactSettings {
DWORD signature;
DWORD ofsNext; //offset to the next contactsettings in the chain
DWORD ofsModuleName; //offset to the DBModuleName of the owner of these
//settings
DWORD cbBlob; //size of the blob in bytes. May be larger than the
//actual size for reducing the number of moves
//required using granularity in resizing
BYTE blob[1]; //the blob. a back-to-back sequence of DBSetting
//structs, the last has cbName=0
};
/* not a valid structure, content is figured out on the fly
struct DBSetting {
BYTE cbName; //number of bytes in the name of this setting
//this =0 marks the end
char szName[...]; //setting name, excluding nul
BYTE dataType; //type of data. see m_database.h, db/contact/getsetting
union { //a load of types of data, length is defined by dataType
BYTE bVal; WORD wVal; DWORD dVal;
struct {
WORD cbString;
char szVal[...]; //excludes nul terminator
};
struct {
WORD cbBlob;
BYTE blobVal[...];
};
};
};
*/
#define DBEVENT_SIGNATURE 0x45DECADEu
struct DBEvent {
DWORD signature;
DWORD ofsPrev,ofsNext; //offset to the previous and next events in the
//chain. Chain is sorted chronologically
DWORD ofsModuleName; //offset to a DBModuleName struct of the name of
//the owner of this event
DWORD timestamp; //seconds since 00:00:00 01/01/1970
DWORD flags; //see m_database.h, db/event/add
WORD eventType; //module-defined event type
DWORD cbBlob; //number of bytes in the blob
BYTE blob[1]; //the blob. module-defined formatting
};
#include <poppack.h>
//databasecorruption: called if any signatures are broken. very very fatal
void DatabaseCorruption(const char *szPart);
PBYTE DBRead(DWORD ofs,int bytesRequired,int *bytesAvail); //any preview result could be invalidated by the next call
void DBWrite(DWORD ofs,PVOID pData,int count);
void DBFlush(int setting);
void DBMoveChunk(DWORD ofsDest,DWORD ofsSource,int bytes);
DWORD CreateNewSpace(int bytes);
void DeleteSpace(DWORD ofs,int bytes);
void GetProfileDirectory(char *szPath,int cbPath);
int GetDefaultProfilePath(char *szPath,int cbPath,int *specified);
int ShouldShowProfileManager(void);
#ifdef _DEBUG
#define MAXCACHEDREADSIZE 512
#else
#define MAXCACHEDREADSIZE 2048 //technically 4096 would work, but I'm not going to push it
#endif
#ifdef _DEBUG
//#define DBLOGGING
#endif
#ifdef DBLOGGING
void DBLog(const char *file,int line,const char *fmt,...);
#define logg() DBLog(__FILE__,__LINE__,"")
#define log0(s) DBLog(__FILE__,__LINE__,s)
#define log1(s,a) DBLog(__FILE__,__LINE__,s,a)
#define log2(s,a,b) DBLog(__FILE__,__LINE__,s,a,b)
#define log3(s,a,b,c) DBLog(__FILE__,__LINE__,s,a,b,c)
#define log4(s,a,b,c,d) DBLog(__FILE__,__LINE__,s,a,b,c,d)
#else
#define logg()
#define log0(s)
#define log1(s,a)
#define log2(s,a,b)
#define log3(s,a,b,c)
#define log4(s,a,b,c,d)
#endif
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