You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
125 lines
3.2 KiB
125 lines
3.2 KiB
// MLSBWalk.h : Declaration of the CMLStrBufWalk
|
|
|
|
#ifndef __MLSBWALK_H_
|
|
#define __MLSBWALK_H_
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// CMLStrBufWalk
|
|
template <class IMLSTRBUF, class CHTYPE>
|
|
class CMLStrBufWalk
|
|
{
|
|
public:
|
|
inline CMLStrBufWalk(IMLSTRBUF* pMLStrBuf, long cchOffset, long cchLen, BOOL fCanStopAtMiddle = FALSE);
|
|
BOOL Lock(HRESULT& rhr);
|
|
void Unlock(HRESULT& rhr, long cchActual = 0);
|
|
inline CHTYPE* GetStr(void);
|
|
inline long GetCCh(void) const;
|
|
inline long GetDoneCCh(void) const;
|
|
inline long GetRestCCh(void) const;
|
|
|
|
protected:
|
|
IMLSTRBUF* m_pMLStrBuf;
|
|
BOOL m_fCanStopAtMiddle;
|
|
long m_cchOffset;
|
|
long m_cchLen;
|
|
long m_cchDone;
|
|
CHTYPE* m_pszBuf;
|
|
long m_cchBuf;
|
|
};
|
|
|
|
template <class IMLSTRBUF, class CHTYPE>
|
|
CMLStrBufWalk<IMLSTRBUF, CHTYPE>::CMLStrBufWalk(IMLSTRBUF* pMLStrBuf, long cchOffset, long cchLen, BOOL fCanStopAtMiddle) :
|
|
m_pMLStrBuf(pMLStrBuf),
|
|
m_fCanStopAtMiddle(fCanStopAtMiddle)
|
|
{
|
|
m_cchOffset = cchOffset;
|
|
m_cchLen = cchLen;
|
|
m_cchDone = 0;
|
|
|
|
m_pszBuf = NULL; // Mark as it's not locked
|
|
}
|
|
|
|
template <class IMLSTRBUF, class CHTYPE>
|
|
BOOL CMLStrBufWalk<IMLSTRBUF, CHTYPE>::Lock(HRESULT& rhr)
|
|
{
|
|
if (m_pszBuf)
|
|
rhr = E_FAIL; // Already locked
|
|
|
|
if (SUCCEEDED(rhr) &&
|
|
m_cchLen > 0 &&
|
|
FAILED(rhr = m_pMLStrBuf->LockBuf(m_cchOffset, m_cchLen, &m_pszBuf, &m_cchBuf)))
|
|
{
|
|
m_pszBuf = NULL; // Mark as it's not locked
|
|
}
|
|
|
|
if (m_fCanStopAtMiddle && FAILED(rhr) && m_cchDone > 0)
|
|
{
|
|
rhr = S_OK;
|
|
return FALSE; // Stop it, but not fail
|
|
}
|
|
else
|
|
{
|
|
return (SUCCEEDED(rhr) && m_cchLen > 0);
|
|
}
|
|
}
|
|
|
|
template <class IMLSTRBUF, class CHTYPE>
|
|
void CMLStrBufWalk<IMLSTRBUF, CHTYPE>::Unlock(HRESULT& rhr, long cchActual)
|
|
{
|
|
HRESULT hr = S_OK;
|
|
|
|
if (!m_pszBuf)
|
|
hr = E_FAIL; // Not locked yet
|
|
|
|
if (SUCCEEDED(hr) &&
|
|
SUCCEEDED(hr = m_pMLStrBuf->UnlockBuf(m_pszBuf, 0, 0))) // Unlock even if rhr is already failed
|
|
{
|
|
if (!cchActual)
|
|
cchActual = m_cchBuf;
|
|
else
|
|
ASSERT(cchActual > 0 && cchActual <= m_cchBuf);
|
|
|
|
m_cchOffset += cchActual;
|
|
m_cchLen -= cchActual;
|
|
m_cchDone += cchActual;
|
|
}
|
|
|
|
m_pszBuf = NULL; // Unlock anyway
|
|
|
|
if (SUCCEEDED(rhr))
|
|
rhr = hr; // if rhr is failed before UnlockBuf, use it
|
|
}
|
|
|
|
template <class IMLSTRBUF, class CHTYPE>
|
|
CHTYPE* CMLStrBufWalk<IMLSTRBUF, CHTYPE>::GetStr(void)
|
|
{
|
|
ASSERT(m_pszBuf); // Not locked
|
|
return m_pszBuf;
|
|
}
|
|
|
|
template <class IMLSTRBUF, class CHTYPE>
|
|
long CMLStrBufWalk<IMLSTRBUF, CHTYPE>::GetCCh(void) const
|
|
{
|
|
ASSERT(m_pszBuf); // Not locked
|
|
if (m_pszBuf)
|
|
return m_cchBuf;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
template <class IMLSTRBUF, class CHTYPE>
|
|
long CMLStrBufWalk<IMLSTRBUF, CHTYPE>::GetDoneCCh(void) const
|
|
{
|
|
return m_cchDone;
|
|
}
|
|
|
|
template <class IMLSTRBUF, class CHTYPE>
|
|
long CMLStrBufWalk<IMLSTRBUF, CHTYPE>::GetRestCCh(void) const
|
|
{
|
|
return m_cchLen - m_cchDone;
|
|
}
|
|
|
|
typedef CMLStrBufWalk<IMLangStringBufW, WCHAR> CMLStrBufWalkW;
|
|
typedef CMLStrBufWalk<IMLangStringBufA, CHAR> CMLStrBufWalkA;
|
|
|
|
#endif //__MLSBWALK_H_
|