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/*
Miranda Database Tool
Copyright (C) 2001-2005 Richard Hughes
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 "dbtool.h"
extern DWORD spaceProcessed,sourceFileSize;
int SignatureValid(DWORD ofs,DWORD signature)
{
DWORD sig;
if(ofs+sizeof(sig)>=sourceFileSize) {
AddToStatus(STATUS_ERROR,TranslateT("Invalid offset found (database truncated?)"));
return 0;
}
sig = *(DWORD*)(opts.pFile+ofs);
return sig==signature;
}
int PeekSegment(DWORD ofs,PVOID buf,int cbBytes)
{
DWORD bytesRead;
if(ofs>=sourceFileSize) {
AddToStatus(STATUS_ERROR,TranslateT("Invalid offset found"));
return ERROR_SEEK;
}
if (ofs+cbBytes>sourceFileSize)
bytesRead = sourceFileSize - ofs;
else
bytesRead = cbBytes;
if(bytesRead==0) {
AddToStatus(STATUS_ERROR,TranslateT("Error reading, database truncated? (%u)"),GetLastError());
return ERROR_READ_FAULT;
}
CopyMemory(buf, opts.pFile+ofs, bytesRead);
if((int)bytesRead<cbBytes) return ERROR_HANDLE_EOF;
return ERROR_SUCCESS;
}
int ReadSegment(DWORD ofs,PVOID buf,int cbBytes)
{
int ret;
ret=PeekSegment(ofs,buf,cbBytes);
if(ret!=ERROR_SUCCESS && ret!=ERROR_HANDLE_EOF) return ret;
if(opts.bAggressive) {
if (ofs+cbBytes>sourceFileSize) {
AddToStatus(STATUS_WARNING,TranslateT("Can't write to working file, aggressive mode may be too aggressive now"));
ZeroMemory(opts.pFile+ofs,sourceFileSize-ofs);
}
else
ZeroMemory(opts.pFile+ofs,cbBytes);
}
spaceProcessed+=cbBytes;
return ERROR_SUCCESS;
}
DWORD WriteSegment(DWORD ofs,PVOID buf,int cbBytes)
{
DWORD bytesWritten;
if(opts.bCheckOnly) return 0xbfbfbfbf;
if(ofs==WSOFS_END) {
ofs=dbhdr.ofsFileEnd;
dbhdr.ofsFileEnd+=cbBytes;
}
SetFilePointer(opts.hOutFile,ofs,NULL,FILE_BEGIN);
WriteFile(opts.hOutFile,buf,cbBytes,&bytesWritten,NULL);
if((int)bytesWritten<cbBytes) {
AddToStatus(STATUS_FATAL,TranslateT("Can't write to output file - disk full? (%u)"),GetLastError());
return WS_ERROR;
}
return ofs;
}
int ReadWrittenSegment(DWORD ofs,PVOID buf,int cbBytes)
{
DWORD bytesRead;
if(opts.bCheckOnly) return 0xbfbfbfbf;
if(ofs + cbBytes > dbhdr.ofsFileEnd )
return ERROR_SEEK;
SetFilePointer(opts.hOutFile,ofs,NULL,FILE_BEGIN);
ReadFile(opts.hOutFile,buf,cbBytes,&bytesRead,NULL);
if((int)bytesRead<cbBytes)
return ERROR_READ_FAULT;
return ERROR_SUCCESS;
}
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