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343 lines
10 KiB
343 lines
10 KiB
// MLStrBuf.h : Declaration and implementation of the IMLangStringBufW/A classes
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#ifndef __MLSTRBUF_H_
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#define __MLSTRBUF_H_
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#include <mlang.h>
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/////////////////////////////////////////////////////////////////////////////
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// CMLStrBufTempl
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template <class CHTYPE, class IMLSB, class MEM, class ACCESS>
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class CMLStrBufTempl : public IMLSB, public MEM, public ACCESS
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{
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public:
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CMLStrBufTempl(CHTYPE* psz = NULL, long cch = 0, void* pv = NULL, long cb = 0) : ACCESS(psz, cch, pv, cb)
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#ifdef DEBUG
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{m_nLockCount = 0;}
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#else
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{}
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#endif
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~CMLStrBufTempl(void) {ASSERT(!m_nLockCount);}
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// IUnknown
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STDMETHOD(QueryInterface)(REFIID riid, void **ppvObj);
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STDMETHOD_(ULONG, AddRef)(void) {return AddRefI();}
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STDMETHOD_(ULONG, Release)(void) {return ReleaseI();}
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// IMLangStringBufW/A
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STDMETHOD(GetStatus)(long* plFlags, long* pcchBuf);
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STDMETHOD(LockBuf)(long cchOffset, long cchMaxLock, CHTYPE** ppszBuf, long* pcchBuf);
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STDMETHOD(UnlockBuf)(const CHTYPE* pszBuf, long cchOffset, long cchWrite);
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STDMETHOD(Insert)(long cchOffset, long cchMaxInsert, long* pcchActual) {ASSERT(!m_nLockCount); return InsertI(cchOffset, cchMaxInsert, pcchActual);}
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STDMETHOD(Delete)(long cchOffset, long cchDelete) {ASSERT(!m_nLockCount); return DeleteI(cchOffset, cchDelete);}
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protected:
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#ifdef DEBUG
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int m_nLockCount;
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#endif
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};
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template <class CHTYPE, class IMLSB, class MEM, class ACCESS>
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HRESULT CMLStrBufTempl<CHTYPE, IMLSB, MEM, ACCESS>::QueryInterface(REFIID riid, void **ppvObj)
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{
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if (IsEqualIID(riid, IID_IUnknown) ||
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(sizeof(CHTYPE) == sizeof(CHAR) && IsEqualIID(riid, IID_IMLangStringBufA)) ||
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(sizeof(CHTYPE) == sizeof(WCHAR) && IsEqualIID(riid, IID_IMLangStringBufW)))
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{
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*ppvObj = this;
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AddRef();
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return S_OK;
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}
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else
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{
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*ppvObj = NULL;
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return E_NOINTERFACE;
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}
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}
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template <class CHTYPE, class IMLSB, class MEM, class ACCESS>
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HRESULT CMLStrBufTempl<CHTYPE, IMLSB, MEM, ACCESS>::GetStatus(long* plFlags, long* pcchBuf)
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{
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if (plFlags)
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*plFlags = GetFlags();
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if (pcchBuf)
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*pcchBuf = m_cchStr;
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return S_OK;
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}
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template <class CHTYPE, class IMLSB, class MEM, class ACCESS>
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HRESULT CMLStrBufTempl<CHTYPE, IMLSB, MEM, ACCESS>::LockBuf(long cchOffset, long cchMaxLock, CHTYPE** ppszBuf, long* pcchBuf)
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{
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ASSERT(cchOffset >= 0 && cchOffset < m_cchStr);
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ASSERT(cchMaxLock >= 1 && cchMaxLock <= m_cchStr - cchOffset);
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#ifdef DEBUG
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m_nLockCount++;
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#endif
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if (ppszBuf)
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*ppszBuf = m_pszBuf + cchOffset;
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if (pcchBuf)
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*pcchBuf = cchMaxLock;
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return S_OK;
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}
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template <class CHTYPE, class IMLSB, class MEM, class ACCESS>
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HRESULT CMLStrBufTempl<CHTYPE, IMLSB, MEM, ACCESS>::UnlockBuf(const CHTYPE* pszBuf, long cchOffset, long cchWrite)
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{
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ASSERT(m_nLockCount > 0);
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ASSERT(cchOffset >= 0 && pszBuf + cchOffset >= m_pszBuf && pszBuf + cchOffset < m_pszBuf + m_cchStr);
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ASSERT(cchWrite == 0);
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#ifdef DEBUG
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m_nLockCount--;
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#endif
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return S_OK;
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}
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/////////////////////////////////////////////////////////////////////////////
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// CMLStrBufConst
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template <class CHTYPE>
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class CMLStrBufConst
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{
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protected:
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CMLStrBufConst(CHTYPE* psz, long cch, void*, long) : m_pszBuf(psz), m_cchStr(cch) {}
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long GetFlags(void) const {return MLSTR_READ;}
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HRESULT InsertI(long cchOffset, long cchMaxInsert, long* pcchActual) {ASSERT(FALSE); if (pcchActual) *pcchActual = 0; return E_FAIL;}
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HRESULT DeleteI(long cchOffset, long cchDelete) {ASSERT(FALSE); return E_FAIL;}
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CHTYPE* const m_pszBuf;
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const long m_cchStr;
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};
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/////////////////////////////////////////////////////////////////////////////
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// CMLStrBufVariable
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template <class CHTYPE>
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class CMLStrBufVariable
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{
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protected:
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CMLStrBufVariable(CHTYPE* psz, long cch, void* pv, long cb) {m_pszBuf = (CHTYPE*)pv; m_cchBuf = cb / sizeof(CHTYPE); m_cchOffset = psz - m_pszBuf; m_cchStr = cch;}
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~CMLStrBufVariable(void) {if (m_pszBuf) MemFree(m_pszBuf);}
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long GetFlags(void) const {return MLSTR_READ | MLSTR_WRITE;}
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HRESULT InsertI(long cchOffset, long cchMaxInsert, long* pcchActual);
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HRESULT DeleteI(long cchOffset, long cchDelete);
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virtual LPVOID MemAlloc(ULONG) {return NULL;}
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virtual LPVOID MemRealloc(LPVOID, ULONG) {return NULL;}
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virtual void MemFree(LPVOID) {}
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virtual long RoundBufSize(long cchStr) {return (cchStr + 15) / 16;}
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CHTYPE* m_pszBuf;
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long m_cchBuf;
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long m_cchOffset;
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long m_cchStr;
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};
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template <class CHTYPE>
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HRESULT CMLStrBufVariable<CHTYPE>::InsertI(long cchOffset, long cchMaxInsert, long* pcchActual)
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{
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ASSERT(cchOffset >= 0 && cchOffset < m_cchStr);
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ASSERT(cchMaxInsert >= 0);
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long lShiftLeft = 0;
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long lShiftRight = 0;
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if (cchOffset < m_cchStr - cchOffset &&
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cchMaxInsert <= m_cchOffset)
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{
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lShiftLeft = cchMaxInsert;
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}
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else if (cchMaxInsert <= m_cchBuf - m_cchOffset - m_cchStr)
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{
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lShiftRight = cchMaxInsert;
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}
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else if (cchMaxInsert <= m_cchOffset)
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{
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lShiftLeft = cchMaxInsert;
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}
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else if (cchMaxInsert <= m_cchBuf - m_cchStr)
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{
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lShiftLeft = m_cchOffset;
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lShiftRight = cchMaxInsert - m_cchOffset;
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}
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else
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{
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void* pBuf;
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const long cchNew = RoundBufSize(m_cchOffset + m_cchStr + cchMaxInsert);
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if (!m_pszBuf)
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pBuf = MemAlloc(sizeof(*m_pszBuf) * cchNew);
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else
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pBuf = MemRealloc(m_pszBuf, sizeof(*m_pszBuf) * cchNew);
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if (pBuf)
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{
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m_pszBuf = (WCHAR*)pBuf;
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m_cchBuf = cchNew;
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lShiftRight = cchMaxInsert;
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}
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else
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{
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lShiftRight = m_cchBuf - m_cchOffset - m_cchStr;
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lShiftLeft = cchMaxInsert - lShiftRight;
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if (!pcchActual)
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return E_OUTOFMEMORY;
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}
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}
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if (lShiftLeft > 0)
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{
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if (cchOffset)
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::memmove(m_pszBuf + m_cchOffset - lShiftLeft, m_pszBuf + m_cchOffset, sizeof(*m_pszBuf) * cchOffset);
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m_cchOffset -= lShiftLeft;
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m_cchStr += lShiftLeft;
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}
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if (lShiftRight > 0)
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{
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if (m_cchStr - cchOffset)
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::memmove(m_pszBuf + m_cchOffset + lShiftRight, m_pszBuf + m_cchOffset, sizeof(*m_pszBuf) * (m_cchStr - cchOffset));
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m_cchStr += lShiftRight;
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}
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if (pcchActual)
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*pcchActual = lShiftLeft + lShiftRight;
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return S_OK;
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}
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template <class CHTYPE>
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HRESULT CMLStrBufVariable<CHTYPE>::DeleteI(long cchOffset, long cchDelete)
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{
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ASSERT(cchOffset >= 0 && cchOffset < m_cchStr);
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ASSERT(cchDelete >= 0 && cchDelete < m_cchStr - cchOffset);
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long cchShrink = m_cchBuf - RoundBufSize(RoundBufSize(m_cchStr - cchDelete) + 1);
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cchShrink = max(cchShrink, 0);
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const long cchRight = m_cchStr - cchOffset - cchDelete;
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if (cchOffset < cchRight && m_cchBuf - m_cchOffset - m_cchStr >= cchShrink)
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{
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if (cchOffset)
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::memmove(m_pszBuf + m_cchOffset + cchDelete, m_pszBuf + m_cchOffset, sizeof(*m_pszBuf) * cchOffset);
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m_cchOffset += cchDelete;
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m_cchStr -= cchDelete;
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}
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else if (m_cchBuf - m_cchOffset - m_cchStr + cchDelete >= cchShrink)
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{
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if (cchRight)
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::memmove(m_pszBuf + m_cchOffset + cchOffset, m_pszBuf + m_cchOffset + cchDelete, sizeof(*m_pszBuf) * cchRight);
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m_cchStr -= cchDelete;
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}
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else
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{
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if (cchOffset)
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::memmove(m_pszBuf, m_pszBuf + m_cchOffset, sizeof(*m_pszBuf) * cchOffset);
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if (cchRight)
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::memmove(m_pszBuf + cchOffset, m_pszBuf + m_cchOffset + cchDelete, sizeof(*m_pszBuf) * cchRight);
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m_cchOffset = 0;
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m_cchStr -= cchDelete;
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}
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if (cchShrink)
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{
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void* pBuf = MemRealloc(m_pszBuf, sizeof(*m_pszBuf) * (m_cchBuf - cchShrink));
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if (pBuf)
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{
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m_pszBuf = (WCHAR*)pBuf;
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m_cchBuf -= cchShrink;
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}
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else
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{
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return E_OUTOFMEMORY;
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}
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}
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return S_OK;
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}
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/////////////////////////////////////////////////////////////////////////////
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// CMLStrBufStack
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class CMLStrBufStack
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{
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protected:
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#ifdef DEBUG
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inline CMLStrBufStack(void) {m_cRef = 0;}
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#else
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inline CMLStrBufStack(void) {}
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#endif
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inline ~CMLStrBufStack(void) {ASSERT(!m_cRef);}
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ULONG AddRefI(void)
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{
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#ifdef DEBUG
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m_cRef++;
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return m_cRef;
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#else
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ASSERT(FALSE);
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return 0;
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#endif
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}
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ULONG ReleaseI(void)
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{
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#ifdef DEBUG
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m_cRef--;
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ASSERT(m_cRef >= 0);
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return m_cRef;
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#else
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ASSERT(FALSE);
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return 0;
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#endif
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}
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#ifdef DEBUG
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int m_cRef;
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#endif
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};
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/////////////////////////////////////////////////////////////////////////////
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// CMLStrBufHeap
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class CMLStrBufHeap
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{
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protected:
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inline CMLStrBufHeap(void) {m_cRef = 0;}
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inline ~CMLStrBufHeap(void) {ASSERT(!m_cRef);}
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ULONG AddRefI(void) {m_cRef++; return m_cRef;}
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ULONG ReleaseI(void) {m_cRef--; const int cRef = m_cRef; if (!cRef) delete this; return cRef;}
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int m_cRef;
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};
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typedef CMLStrBufTempl<WCHAR, IMLangStringBufW, CMLStrBufStack, CMLStrBufConst<WCHAR> > CMLStrBufConstStackW;
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typedef CMLStrBufTempl<CHAR, IMLangStringBufA, CMLStrBufStack, CMLStrBufConst<CHAR> > CMLStrBufConstStackA;
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typedef CMLStrBufTempl<WCHAR, IMLangStringBufW, CMLStrBufStack, CMLStrBufVariable<WCHAR> > CMLStrBufStackW;
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typedef CMLStrBufTempl<CHAR, IMLangStringBufA, CMLStrBufStack, CMLStrBufVariable<CHAR> > CMLStrBufStackA;
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typedef CMLStrBufTempl<WCHAR, IMLangStringBufW, CMLStrBufHeap, CMLStrBufConst<WCHAR> > CMLStrBufConstW;
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typedef CMLStrBufTempl<CHAR, IMLangStringBufA, CMLStrBufHeap, CMLStrBufConst<CHAR> > CMLStrBufConstA;
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typedef CMLStrBufTempl<WCHAR, IMLangStringBufW, CMLStrBufHeap, CMLStrBufVariable<WCHAR> > CMLStrBufW;
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typedef CMLStrBufTempl<CHAR, IMLangStringBufA, CMLStrBufHeap, CMLStrBufVariable<CHAR> > CMLStrBufA;
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#ifdef UNICODE
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typedef CMLStrBufConstStackW CMLStrBufConstStackT;
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typedef CMLStrBufStackW CMLStrBufStackT;
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typedef CMLStrBufConstW CMLStrBufConstT;
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typedef CMLStrBufW CMLStrBufT;
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#else
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typedef CMLStrBufConstStackA CMLStrBufConstStackT;
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typedef CMLStrBufStackA CMLStrBufStackT;
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typedef CMLStrBufConstA CMLStrBufConstT;
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typedef CMLStrBufA CMLStrBufT;
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#endif
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#endif //__MLSTRBUF_H_
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