//we are assumed to be in a mutex here
void DBWrite(DWORD ofs,PVOID pData,int bytes)
{
log2("write %d@%08x",bytes,ofs);
if (ofs+bytes>dwFileSize) ReMap(ofs+bytes-dwFileSize);
MoveMemory(pDbCache+ofs,pData,bytes);
logg();
}
DWORD CDb3Mmap::CreateNewSpace(int bytes)
{
DWORD ofsNew = m_dbHeader.ofsFileEnd;
m_dbHeader.ofsFileEnd += bytes;
if (m_dbHeader.ofsFileEnd > m_dwFileSize)
ReMap(m_dbHeader.ofsFileEnd - m_dwFileSize);
DBWrite(0, &m_dbHeader, sizeof(m_dbHeader));
log2("newspace %d@%08x", bytes, ofsNew);
return ofsNew;
}
void CStkFile::ReMapFromBegin(int nCount)
{
if (m_bShareMem == FALSE && m_hFile == (HANDLE)hFileNull || m_hFileMap == NULL)
{
ASSERT(FALSE);
return;
}
SeekToBegin();
ReMap(nCount);
}
void DBMoveChunk(DWORD ofsDest,DWORD ofsSource,int bytes)
{
int x = 0;
log3("move %d %08x->%08x",bytes,ofsSource,ofsDest);
if (ofsDest+bytes>dwFileSize) ReMap(ofsDest+bytes-dwFileSize);
if (ofsSource+bytes>dwFileSize) {
x = ofsSource+bytes-dwFileSize;
log0("buggy move!");
_ASSERT(0);
}
if (x > 0)
ZeroMemory(pDbCache+ofsDest+bytes-x, x);
if (ofsSource < dwFileSize)
MoveMemory(pDbCache+ofsDest,pDbCache+ofsSource, bytes-x);
logg();
}
void CStkFile::Write(const void* lpBuf, UINT nCount)
{
ASSERT(m_bShareMem == TRUE || m_hFile != (HANDLE)hFileNull);
if (m_bShareMem == FALSE && m_hFile == (HANDLE)hFileNull || m_hFileMap == NULL)
{
ASSERT(FALSE);
return;
}
if (nCount == 0)
return;
if (ReMap(nCount) == FALSE)
return;
ASSERT(lpBuf != NULL);
ASSERT(AfxIsValidAddress(lpBuf, nCount, FALSE));
memcpy(m_lpvFileCurrent, lpBuf, nCount);
m_lpvFileCurrent += nCount;
if (m_lpvFileCurrent > m_lpvFileEnd)
m_lpvFileEnd = m_lpvFileCurrent;
}
