windows-server-2003/admin/activec/inc/cstr.h

//+-------------------------------------------------------------------------
//
//  Microsoft Windows
//
//  Copyright (C) Microsoft Corporation, 1999 - 1999
//
//  File:       cstr.h
//
//--------------------------------------------------------------------------

#ifndef __STR_H__
#define __STR_H__

#include <tchar.h>

#define STRAPI __stdcall
struct _STR_DOUBLE  { BYTE doubleBits[sizeof(double)]; };

BOOL STRAPI IsValidString(LPCSTR lpsz, int nLength);
BOOL STRAPI IsValidString(LPCWSTR lpsz, int nLength);

BOOL STRAPI IsValidAddressz(const void* lp, UINT nBytes, BOOL bReadWrite=TRUE);

int  STRAPI StrLoadString(HINSTANCE hInst, UINT nID, LPTSTR lpszBuf); 

class CStr
{
public:

// Constructors
    CStr();
    CStr(const CStr& stringSrc);
    CStr(TCHAR ch, int nRepeat = 1);
    CStr(LPCSTR lpsz);
    CStr(LPCWSTR lpsz);
    CStr(LPCTSTR lpch, int nLength);
    CStr(const unsigned char* psz);

// Attributes & Operations
    // as an array of characters
    int GetLength() const;
    BOOL IsEmpty() const;
    void Empty();                       // free up the data

    TCHAR GetAt(int nIndex) const;      // 0 based
    TCHAR operator[](int nIndex) const; // same as GetAt
    void SetAt(int nIndex, TCHAR ch);
    operator LPCTSTR() const;           // as a C string

    // overloaded assignment
    const CStr& operator=(const CStr& stringSrc);
    const CStr& operator=(TCHAR ch);
#ifdef UNICODE
    const CStr& operator=(char ch);
#endif
    const CStr& operator=(LPCSTR lpsz);
    const CStr& operator=(LPCWSTR lpsz);
    const CStr& operator=(const unsigned char* psz);

    // string concatenation
    const CStr& operator+=(const CStr& string);
    const CStr& operator+=(TCHAR ch);
#ifdef UNICODE
    const CStr& operator+=(char ch);
#endif
    const CStr& operator+=(LPCTSTR lpsz);

    friend CStr STRAPI operator+(const CStr& string1,
            const CStr& string2);
    friend CStr STRAPI operator+(const CStr& string, TCHAR ch);
    friend CStr STRAPI operator+(TCHAR ch, const CStr& string);
#ifdef UNICODE
    friend CStr STRAPI operator+(const CStr& string, char ch);
    friend CStr STRAPI operator+(char ch, const CStr& string);
#endif
    friend CStr STRAPI operator+(const CStr& string, LPCTSTR lpsz);
    friend CStr STRAPI operator+(LPCTSTR lpsz, const CStr& string);

    // string comparison
    int Compare(LPCTSTR lpsz) const;         // straight character
    int CompareNoCase(LPCTSTR lpsz) const;   // ignore case
    int Collate(LPCTSTR lpsz) const;         // NLS aware

    // simple sub-string extraction
    CStr Mid(int nFirst, int nCount) const;
    CStr Mid(int nFirst) const;
    CStr Left(int nCount) const;
    CStr Right(int nCount) const;

    CStr SpanIncluding(LPCTSTR lpszCharSet) const;
    CStr SpanExcluding(LPCTSTR lpszCharSet) const;

    // upper/lower/reverse conversion
    void MakeUpper();
    void MakeLower();
    void MakeReverse();

    // trimming whitespace (either side)
    void TrimRight();
    void TrimLeft();

    // searching (return starting index, or -1 if not found)
    // look for a single character match
    int Find(TCHAR ch) const;               // like "C" strchr
    int ReverseFind(TCHAR ch) const;
    int FindOneOf(LPCTSTR lpszCharSet) const;

    // look for a specific sub-string
    int Find(LPCTSTR lpszSub) const;        // like "C" strstr

    // simple formatting
    void FormatV(LPCTSTR lpszFormat, va_list argList);
    void Format(LPCTSTR lpszFormat, ...);

#ifndef _MAC
    // formatting for localization (uses FormatMessage API)
    void __cdecl FormatMessage(LPCTSTR lpszFormat, ...);
    void __cdecl FormatMessage(UINT nFormatID, ...);
#endif

    // Windows support
    BOOL LoadString(HINSTANCE hInst, UINT nID);          // load from string resource
                                        // 255 chars max
    BSTR AllocSysString();
    BSTR SetSysString(BSTR* pbstr);

    // Access to string implementation buffer as "C" character array
    LPTSTR GetBuffer(int nMinBufLength);
    void ReleaseBuffer(int nNewLength = -1);
    LPTSTR GetBufferSetLength(int nNewLength);
    void FreeExtra();

// Implementation
public:
    ~CStr();
    int GetAllocLength() const;

protected:
    // lengths/sizes in characters
    //  (note: an extra character is always allocated)
    LPTSTR m_pchData;           // actual string (zero terminated)
    int m_nDataLength;          // does not include terminating 0
    int m_nAllocLength;         // does not include terminating 0

    // implementation helpers
    void Init();
    void AllocCopy(CStr& dest, int nCopyLen, int nCopyIndex, int nExtraLen) const;
    void AllocBuffer(int nLen);
    void AssignCopy(int nSrcLen, LPCTSTR lpszSrcData);
    void ConcatCopy(int nSrc1Len, LPCTSTR lpszSrc1Data, int nSrc2Len, LPCTSTR lpszSrc2Data);
    void ConcatInPlace(int nSrcLen, LPCTSTR lpszSrcData);
    static void SafeDelete(LPTSTR lpch);
    static int SafeStrlen(LPCTSTR lpsz);
};

// Compare helpers
BOOL STRAPI operator==(const CStr& s1, const CStr& s2);
BOOL STRAPI operator==(const CStr& s1, LPCTSTR s2);
BOOL STRAPI operator==(LPCTSTR s1, const CStr& s2);
BOOL STRAPI operator!=(const CStr& s1, const CStr& s2);
BOOL STRAPI operator!=(const CStr& s1, LPCTSTR s2);
BOOL STRAPI operator!=(LPCTSTR s1, const CStr& s2);
BOOL STRAPI operator<(const CStr& s1, const CStr& s2);
BOOL STRAPI operator<(const CStr& s1, LPCTSTR s2);
BOOL STRAPI operator<(LPCTSTR s1, const CStr& s2);
BOOL STRAPI operator>(const CStr& s1, const CStr& s2);
BOOL STRAPI operator>(const CStr& s1, LPCTSTR s2);
BOOL STRAPI operator>(LPCTSTR s1, const CStr& s2);
BOOL STRAPI operator<=(const CStr& s1, const CStr& s2);
BOOL STRAPI operator<=(const CStr& s1, LPCTSTR s2);
BOOL STRAPI operator<=(LPCTSTR s1, const CStr& s2);
BOOL STRAPI operator>=(const CStr& s1, const CStr& s2);
BOOL STRAPI operator>=(const CStr& s1, LPCTSTR s2);
BOOL STRAPI operator>=(LPCTSTR s1, const CStr& s2);

// conversion helpers
int mmc_wcstombsz(char* mbstr, const wchar_t* wcstr, size_t count);
int mmc_mbstowcsz(wchar_t* wcstr, const char* mbstr, size_t count);

// Globals
extern const CStr strEmptyString;
extern TCHAR strChNil;

// Compiler doesn't inline for DBG
/////////////////////////////////////////////////////////////////////////////
// Inline function declarations

inline int CStr::SafeStrlen(LPCTSTR lpsz)
    { return (lpsz == NULL) ? NULL : _tcslen(lpsz); }
inline CStr::CStr(const unsigned char* lpsz)
    { Init(); *this = (LPCSTR)lpsz; }
inline const CStr& CStr::operator=(const unsigned char* lpsz)
    { *this = (LPCSTR)lpsz; return *this; }

#ifdef _UNICODE
inline const CStr& CStr::operator+=(char ch)
    { *this += (TCHAR)ch; return *this; }
inline const CStr& CStr::operator=(char ch)
    { *this = (TCHAR)ch; return *this; }
inline CStr STRAPI operator+(const CStr& string, char ch)
    { return string + (TCHAR)ch; }
inline CStr STRAPI operator+(char ch, const CStr& string)
    { return (TCHAR)ch + string; }
#endif

inline int CStr::GetLength() const
    { return m_nDataLength; }
inline int CStr::GetAllocLength() const
    { return m_nAllocLength; }
inline BOOL CStr::IsEmpty() const
    { return m_nDataLength == 0; }
inline CStr::operator LPCTSTR() const
    { return (LPCTSTR)m_pchData; }

// String support (windows specific)
inline int CStr::Compare(LPCTSTR lpsz) const
    { return _tcscmp(m_pchData, lpsz); }    // MBCS/Unicode aware
inline int CStr::CompareNoCase(LPCTSTR lpsz) const
    { return _tcsicmp(m_pchData, lpsz); }   // MBCS/Unicode aware
// CStr::Collate is often slower than Compare but is MBSC/Unicode
//  aware as well as locale-sensitive with respect to sort order.
inline int CStr::Collate(LPCTSTR lpsz) const
    { return _tcscoll(m_pchData, lpsz); }   // locale sensitive
inline void CStr::MakeUpper()
    { ::CharUpper(m_pchData); }
inline void CStr::MakeLower()
    { ::CharLower(m_pchData); }

inline void CStr::MakeReverse()
    { _tcsrev(m_pchData); }
inline TCHAR CStr::GetAt(int nIndex) const
    {
        ASSERT(nIndex >= 0);
        ASSERT(nIndex < m_nDataLength);

        return m_pchData[nIndex];
    }
inline TCHAR CStr::operator[](int nIndex) const
    {
        // same as GetAt

        ASSERT(nIndex >= 0);
        ASSERT(nIndex < m_nDataLength);

        return m_pchData[nIndex];
    }
inline void CStr::SetAt(int nIndex, TCHAR ch)
    {
        ASSERT(nIndex >= 0);
        ASSERT(nIndex < m_nDataLength);
        ASSERT(ch != 0);

        m_pchData[nIndex] = ch;
    }
inline BOOL STRAPI operator==(const CStr& s1, const CStr& s2)
    { return s1.Compare(s2) == 0; }
inline BOOL STRAPI operator==(const CStr& s1, LPCTSTR s2)
    { return s1.Compare(s2) == 0; }
inline BOOL STRAPI operator==(LPCTSTR s1, const CStr& s2)
    { return s2.Compare(s1) == 0; }
inline BOOL STRAPI operator!=(const CStr& s1, const CStr& s2)
    { return s1.Compare(s2) != 0; }
inline BOOL STRAPI operator!=(const CStr& s1, LPCTSTR s2)
    { return s1.Compare(s2) != 0; }
inline BOOL STRAPI operator!=(LPCTSTR s1, const CStr& s2)
    { return s2.Compare(s1) != 0; }
inline BOOL STRAPI operator<(const CStr& s1, const CStr& s2)
    { return s1.Compare(s2) < 0; }
inline BOOL STRAPI operator<(const CStr& s1, LPCTSTR s2)
    { return s1.Compare(s2) < 0; }
inline BOOL STRAPI operator<(LPCTSTR s1, const CStr& s2)
    { return s2.Compare(s1) > 0; }
inline BOOL STRAPI operator>(const CStr& s1, const CStr& s2)
    { return s1.Compare(s2) > 0; }
inline BOOL STRAPI operator>(const CStr& s1, LPCTSTR s2)
    { return s1.Compare(s2) > 0; }
inline BOOL STRAPI operator>(LPCTSTR s1, const CStr& s2)
    { return s2.Compare(s1) < 0; }
inline BOOL STRAPI operator<=(const CStr& s1, const CStr& s2)
    { return s1.Compare(s2) <= 0; }
inline BOOL STRAPI operator<=(const CStr& s1, LPCTSTR s2)
    { return s1.Compare(s2) <= 0; }
inline BOOL STRAPI operator<=(LPCTSTR s1, const CStr& s2)
    { return s2.Compare(s1) >= 0; }
inline BOOL STRAPI operator>=(const CStr& s1, const CStr& s2)
    { return s1.Compare(s2) >= 0; }
inline BOOL STRAPI operator>=(const CStr& s1, LPCTSTR s2)
    { return s1.Compare(s2) >= 0; }
inline BOOL STRAPI operator>=(LPCTSTR s1, const CStr& s2)
    { return s2.Compare(s1) <= 0; }

// General Exception for memory
class MemoryException
{
public:
    MemoryException(){}
    void DisplayMessage()
    {
    ::MessageBox(NULL, _T("Memory Exception"), _T("System Out of Memory"), MB_OK|MB_ICONSTOP);
    }
};

// General Exception for memory
class ResourceException
{
public:
    ResourceException()
    {
    ::MessageBox(NULL, _T("Resource Exception"), _T("Unable to Load Resource"), MB_OK|MB_ICONSTOP);
    }
};

#endif // __STR_H__

/////////////////////////////////////////////////////////////////////////////