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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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