/*

Miranda NG: the free IM client for Microsoft* Windows*

Copyright 2012 Miranda NG 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.
*/

#include "commonheaders.h"

int InitModuleNames(void);
int InitCache(void);
int InitIni(void);
void UninitIni(void);

DWORD CDb3Base::CreateNewSpace(int bytes)
{
	DWORD ofsNew = m_dbHeader.ofsFileEnd;
	m_dbHeader.ofsFileEnd += bytes;
	DBWrite(0, &m_dbHeader, sizeof(m_dbHeader));
	log2("newspace %d@%08x", bytes, ofsNew);
	return ofsNew;
}

void CDb3Base::DeleteSpace(DWORD ofs, int bytes)
{
	if (ofs+bytes == m_dbHeader.ofsFileEnd)	{
		log2("freespace %d@%08x",bytes,ofs);
		m_dbHeader.ofsFileEnd = ofs;
	}
	else {
		log2("deletespace %d@%08x",bytes,ofs);
		m_dbHeader.slackSpace += bytes;
	}
	DBWrite(0, &m_dbHeader, sizeof(m_dbHeader));
	DBFill(ofs, bytes);
}

DWORD CDb3Base::ReallocSpace(DWORD ofs, int oldSize, int newSize)
{
	if (oldSize >= newSize)
		return ofs;

	DWORD ofsNew;
	if (ofs+oldSize == m_dbHeader.ofsFileEnd) {
		ofsNew = ofs;
		m_dbHeader.ofsFileEnd += newSize-oldSize;
		DBWrite(0,&m_dbHeader,sizeof(m_dbHeader));
		log3("adding newspace %d@%08x+%d", newSize, ofsNew, oldSize);
	}
	else {
		ofsNew = CreateNewSpace(newSize);
		DBMoveChunk(ofsNew,ofs,oldSize);
		DeleteSpace(ofs,oldSize);
	}
	return ofsNew;
}

/////////////////////////////////////////////////////////////////////////////////////////

static DWORD DatabaseCorrupted = 0;
static TCHAR *msg = NULL;
static DWORD dwErr = 0;

void __cdecl dbpanic(void *arg)
{
	if (msg)
	{
		TCHAR err[256];

		if (dwErr == ERROR_DISK_FULL)
			msg = TranslateT("Disk is full. Miranda will now shutdown.");

		mir_sntprintf(err, SIZEOF(err), msg, TranslateT("Database failure. Miranda will now shutdown."), dwErr);

		MessageBox(0,err,TranslateT("Database Error"),MB_SETFOREGROUND|MB_TOPMOST|MB_APPLMODAL|MB_ICONWARNING|MB_OK);
	}
	else
		MessageBox(0,TranslateT("Miranda has detected corruption in your database. This corruption maybe fixed by DBTool.  Please download it from http://miranda-ng.org/. Miranda will now shutdown."),
					TranslateT("Database Panic"),MB_SETFOREGROUND|MB_TOPMOST|MB_APPLMODAL|MB_ICONWARNING|MB_OK);
	TerminateProcess(GetCurrentProcess(),255);
}

void CDb3Base::DatabaseCorruption(TCHAR *text)
{
	int kill = 0;

	EnterCriticalSection(&m_csDbAccess);
	if (DatabaseCorrupted == 0) {
		DatabaseCorrupted++;
		kill++;
		msg = text;
		dwErr = GetLastError();
	} else {
		/* db is already corrupted, someone else is dealing with it, wait here
		so that we don't do any more damage */
		LeaveCriticalSection(&m_csDbAccess);
		Sleep(INFINITE);
		return;
	}
	LeaveCriticalSection(&m_csDbAccess);
	if (kill) {
		_beginthread(dbpanic,0,NULL);
		Sleep(INFINITE);
	}
}

/////////////////////////////////////////////////////////////////////////////////////////

#ifdef DBLOGGING
void DBLog(const char *file,int line,const char *fmt,...)
{
	FILE *fp;
	va_list vararg;
	char str[1024];

	va_start(vararg,fmt);
	mir_vsnprintf(str,sizeof(str),fmt,vararg);
	va_end(vararg);
	fp=fopen("c:\\mirandadatabase.log.txt","at");
	fprintf(fp,"%u: %s %d: %s\n",GetTickCount(),file,line,str);
	fclose(fp);
}
#endif