/*----------------------------------------------------------------------------------------------
Read the given number of bytes from the stream / file.
----------------------------------------------------------------------------------------------*/
STDMETHODIMP FileStream::Read(void * pv, ULONG cb, ULONG * pcbRead)
{
BEGIN_COM_METHOD;
ChkComArrayArg((byte *)pv, cb);
ChkComArgPtrN(pcbRead);
if (m_hfile == NULL)
ThrowHr(WarnHr(E_UNEXPECTED));
if (cb == 0)
{
if (pcbRead)
*pcbRead = 0;
return S_OK;
}
if (!SetFilePosRaw())
ThrowHr(WarnHr(STG_E_SEEKERROR));
DWORD cbRead = 0;
if (!ReadFile(m_hfile, pv, cb, &cbRead, NULL))
ThrowHr(WarnHr(STG_E_READFAULT));
m_ibFilePos.QuadPart += cbRead;
if (pcbRead)
*pcbRead = cbRead;
END_COM_METHOD(g_fact, IID_IStream);
}
/*----------------------------------------------------------------------------------------------
Write the given number of bytes to the stream / file.
----------------------------------------------------------------------------------------------*/
STDMETHODIMP FileStream::Write(const void * pv, ULONG cb, ULONG * pcbWritten)
{
BEGIN_COM_METHOD;
ChkComArrayArg((byte *)pv, cb);
ChkComArgPtrN(pcbWritten);
if (m_hfile == NULL)
ThrowHr(WarnHr(E_UNEXPECTED));
if (cb == 0)
{
if (pcbWritten)
*pcbWritten = 0;
return S_OK;
}
if (!SetFilePosRaw())
ThrowHr(WarnHr(STG_E_SEEKERROR));
DWORD cbWritten = 0;
if (!WriteFile(m_hfile, pv, cb, &cbWritten, NULL))
ThrowHr(WarnHr(STG_E_WRITEFAULT));
m_ibFilePos.QuadPart += cbWritten;
if (pcbWritten)
*pcbWritten = cbWritten;
END_COM_METHOD(g_fact, IID_IStream);
}
/*----------------------------------------------------------------------------------------------
Write the given number of bytes to the stream / file.
----------------------------------------------------------------------------------------------*/
STDMETHODIMP FileStream::Write(const void * pv, UCOMINT32 cb, UCOMINT32 * pcbWritten)
{
BEGIN_COM_METHOD;
ChkComArrayArg((byte *)pv, cb);
ChkComArgPtrN(pcbWritten);
#if WIN32
if (m_hfile == NULL)
ThrowHr(WarnHr(E_UNEXPECTED));
#else
if (m_file < 0)
ThrowHr(WarnHr(E_UNEXPECTED));
#endif
if (cb == 0)
{
if (pcbWritten)
*pcbWritten = 0;
return S_OK;
}
#if WIN32
if (!SetFilePosRaw())
ThrowHr(WarnHr(STG_E_SEEKERROR));
DWORD cbWritten = 0;
if (!WriteFile(m_hfile, pv, cb, &cbWritten, NULL))
ThrowHr(WarnHr(STG_E_WRITEFAULT));
m_ibFilePos.QuadPart += cbWritten;
#else // !WIN32
ssize_t cbWritten = -1;
cbWritten = write(m_file, pv, cb);
if (cbWritten < 0)
ThrowHr(WarnHr(STG_E_WRITEFAULT));
#endif // !WIN32
if (pcbWritten)
*pcbWritten = cbWritten;
END_COM_METHOD(g_fact, IID_IStream);
}
