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Я пользуюсь VS6. Когда нужно CString без MFC, то я пользуюсь библиотекой WTL 7. Там этот класс реализован в <atlmisc.h>. Одно плохо - WTL 7.0 нужно отдельно выкачивать. Её нет ни в самой студии, ни в SDK. Ну а с 7ой студии реализация CString есть в <atlstr.h> А очень давно, когда у меня небыло доступа в инет (чтобы спросить), нужно было использовать на чистом API мои же модули, где из всего MFC использовался только класс CString. Можно было переписать все модули под std::string, но я поступил по-другому - сделал обёртку над строкой из STD, которая предоставляла более привычный мне интерфейс класса CString. | Код |
////////////////////////////////////////////////////////////////////////////////
// File name: CStringKS.h
//
// Description: Класс для работы со строками.
// Реализует почти весь интерфейс CString из MFC.
// Для чего это было написано? Когда не нужно пользоваться MFC, но нужен
// привычный CString и нет ни библиотеки ATL (из 7ой студии - файл <atlstr.h>),
// ни библиотеки WTL 7.0 (файл <atlmisc.h>), где этот класс и реализован.
// Класс CStringKS - это обёртка std::string, которая предоставляет
// пользователю привычный интерфейс CString.
// При использовании MFC, CString и CStringKS - это 2 разных класса.
// А при использовании только Win32 API - это один и тот же класс CStringKS.
//
// Особенности:
// 1. Если в MFC можно было так писать:
// CString str1(_T("qwerty"));
// CString str2;
// str2.Format(_T("str1 = %s"), str1);
// То при использовании CStringKS надо писать так:
// CStringKS str1(_T("qwerty"));
// CStringKS str2;
// str2.Format(_T("str1 = %s"), (LPCTSTR)str1);
//
// 2. Нереализованные методы из MFC:
// friend CArchive& operator<<(CArchive& ar, const CString& string);
// friend CArchive& operator>>(CArchive& ar, CString& string);
// LPTSTR LockBuffer();
// void UnlockBuffer();
//
////////////////////////////////////////////////////////////////////////////////
#ifndef __FILE__CSTRINGKS__
#define __FILE__CSTRINGKS__
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
#include <TChar.H>
#include <ComDef.h>
#pragma warning(disable:4786) // identifier was truncated to '255' characters in the debug information
#include <string>
#include <crtdbg.h>
#include <ATLConv.H>
class CStringKS {
private:
#ifdef UNICODE
typedef std::wstring tstring;
#else
typedef std:: string tstring;
#endif // UNICODE
tstring m_str;
public:
// Constructors
// constructs empty CStringKS
CStringKS() {}
// copy constructor
CStringKS(const CStringKS& stringSrc) : m_str((LPCTSTR)stringSrc) {}
// from a single character
CStringKS(TCHAR ch, int nRepeat = 1) : m_str(tstring(nRepeat, ch)) {}
// from an ANSI string (converts to TCHAR)
CStringKS(LPCSTR lpsz) {if (lpsz!=NULL) {USES_CONVERSION; m_str = A2CT(lpsz);}}
// from a UNICODE string (converts to TCHAR)
CStringKS(LPCWSTR lpsz) {if (lpsz!=NULL) {USES_CONVERSION; m_str = W2CT(lpsz);}}
// subset of characters from an ANSI string (converts to TCHAR)
CStringKS(LPCSTR lpch, int nLength) : m_str((LPCTSTR)(CStringKS(lpch).Left(nLength))) {}
// subset of characters from a UNICODE string (converts to TCHAR)
CStringKS(LPCWSTR lpch, int nLength) : m_str((LPCTSTR)(CStringKS(lpch).Left(nLength))) {}
// from unsigned characters
CStringKS(const unsigned char* psz) {this->operator=(psz);}
// Attributes & Operations
// get data length
int GetLength() const {return m_str.length();}
// TRUE if zero length
BOOL IsEmpty() const {return m_str.empty();}
// clear contents to empty
void Empty() {m_str.erase();}
// return single character at zero-based index
TCHAR GetAt(int nIndex) const {return m_str[nIndex];}
// return single character at zero-based index
TCHAR operator[](int nIndex) const {return m_str[nIndex];}
// set a single character at zero-based index
void SetAt(int nIndex, TCHAR ch) {m_str[nIndex] = ch;}
// return pointer to const string
operator LPCTSTR() const {return m_str.c_str();}
// overloaded assignment
// ref-counted copy from another CStringKS
const CStringKS& operator=(const CStringKS& stringSrc) { if (&stringSrc != this) {m_str = (LPCTSTR)stringSrc;} return *this;}
// set string content to single character
const CStringKS& operator=(TCHAR ch) {m_str = ch; return *this;}
#ifdef _UNICODE
const CStringKS& operator=(char ch) {TCHAR tCh = ch; m_str = tCh; return *this;}
#endif
// copy string content from ANSI string (converts to TCHAR)
const CStringKS& operator=(LPCSTR lpsz) {m_str = (LPCTSTR)CStringKS(lpsz); return *this;}
// copy string content from UNICODE string (converts to TCHAR)
const CStringKS& operator=(LPCWSTR lpsz) {m_str = (LPCTSTR)CStringKS(lpsz); return *this;}
// copy string content from unsigned chars
const CStringKS& operator=(const unsigned char* psz) {USES_CONVERSION; m_str = A2CT((const char*)psz); return *this;}
// string concatenation
// concatenate from another CStringKS
const CStringKS& operator+=(const CStringKS& string) {m_str += (LPCTSTR)string; return *this;}
// concatenate a single character
const CStringKS& operator+=(TCHAR ch) {m_str += ch; return *this;}
#ifdef _UNICODE
// concatenate an ANSI character after converting it to TCHAR
const CStringKS& operator+=(char ch) {TCHAR tCh = ch; m_str += tCh; return *this;}
#endif
// concatenate a UNICODE character after converting it to TCHAR
const CStringKS& operator+=(LPCTSTR lpsz) {m_str += lpsz; return *this;}
friend CStringKS operator+(const CStringKS& string1, const CStringKS& string2) {CStringKS str(string1); return (str += string2);}
friend CStringKS operator+(const CStringKS& string, TCHAR ch) {CStringKS str(string); return (str += ch );}
friend CStringKS operator+(TCHAR ch, const CStringKS& string) {CStringKS str(ch ); return (str += string);}
#ifdef _UNICODE
friend CStringKS operator+(const CStringKS& string, char ch) {CStringKS str(string); TCHAR tCh = ch; return (str += tCh);}
friend CStringKS operator+(char ch, const CStringKS& string) {TCHAR tCh = ch; CStringKS str(tCh); return (str += string);}
#endif
friend CStringKS operator+(const CStringKS& string, LPCTSTR lpsz) {CStringKS str(string); return (str += lpsz );}
friend CStringKS operator+(LPCTSTR lpsz, const CStringKS& string) {CStringKS str(lpsz ); return (str += string);}
// string comparison
// straight character comparison
int Compare (LPCTSTR lpsz) const {return _tcscmp (this->operator LPCTSTR(), lpsz);}
// compare ignoring case
int CompareNoCase(LPCTSTR lpsz) const {return _tcsicmp (this->operator LPCTSTR(), lpsz);}
// NLS aware comparison, case sensitive
int Collate (LPCTSTR lpsz) const {return _tcscoll (this->operator LPCTSTR(), lpsz);}
// NLS aware comparison, case insensitive
int CollateNoCase(LPCTSTR lpsz) const {return _tcsicoll(this->operator LPCTSTR(), lpsz);}
// simple sub-string extraction
// return nCount characters starting at zero-based nFirst
CStringKS Mid(int nFirst, int nCount) const {return Mid(nFirst).Left(nCount);}
// return all characters starting at zero-based nFirst
CStringKS Mid(int nFirst) const {return CStringKS(this->operator LPCTSTR()+max(0,nFirst));}
// return first nCount characters in string
CStringKS Left(int nCount) const {CStringKS str; for (int i=0; i<nCount; i++) str += GetAt(i); return str;}
// return nCount characters from end of string
CStringKS Right(int nCount) const {return Mid(GetLength()-max(0,nCount));}
// characters from beginning that are also in passed string
CStringKS SpanIncluding(LPCTSTR lpszCharSet) const {CStringKS str; for (int i=0; i<GetLength(); i++) if(_tcschr(lpszCharSet, GetAt(i)) != NULL) str += GetAt(i); else break; return str;}
// characters from beginning that are not also in passed string
CStringKS SpanExcluding(LPCTSTR lpszCharSet) const {CStringKS str; for (int i=0; i<GetLength(); i++) if(_tcschr(lpszCharSet, GetAt(i)) == NULL) str += GetAt(i); else break; return str;}
// upper/lower/reverse conversion
// NLS aware conversion to uppercase
void MakeUpper() {
//TCHAR *szStr = new TCHAR[1+GetLength()];
//_tcscpy(szStr, this->operator LPCTSTR());
::CharUpper((LPTSTR)this->operator LPCTSTR());//::CharUpper(szStr);
//m_str = szStr;
//delete szStr;
}
// NLS aware conversion to lowercase
void MakeLower() {
//TCHAR *szStr = new TCHAR[1+GetLength()];
//_tcscpy(szStr, this->operator LPCTSTR());
::CharLower((LPTSTR)this->operator LPCTSTR());//::CharLower(szStr);
//m_str = szStr;
//delete szStr;
}
// reverse string right-to-left
void MakeReverse() {
int len = GetLength();
for (int i=0; i<(len>>1); i++) {
TCHAR ch = GetAt(i);
SetAt(i, GetAt(len-i-1));
SetAt(len-i-1, ch);
}
}
// trimming whitespace (either side)
// remove whitespace starting from right edge
void TrimRight() {TrimRight(_T(' '));}
// remove whitespace starting from left side
void TrimLeft () {TrimLeft (_T(' '));}
// trimming anything (either side)
// remove continuous occurrences of chTarget starting from right
void TrimRight(TCHAR chTarget) {
for (int i=GetLength()-1; i>=0; i--) {
if (GetAt(i) != chTarget) {
operator =(Left(i+1));
break;
}
}
}
// remove continuous occcurrences of characters in passed string,
// starting from right
void TrimRight(LPCTSTR lpszTargets) {
int pos = -1;
CStringKS strTargets(lpszTargets);
for (int i=GetLength()-1; i>=0; i--) {
if (strTargets.Find(GetAt(i)) != -1) {
pos = i;
} else {
break;
}
}
if (pos >= 0) {
operator =(Left(pos));
}
}
// remove continuous occurrences of chTarget starting from left
void TrimLeft(TCHAR chTarget) {
for (int i=0; i<GetLength(); i++) {
if (GetAt(i) != chTarget) {
operator =(Mid(i));
break;
}
}
}
// remove continuous occcurrences of characters in
// passed string, starting from left
void TrimLeft(LPCTSTR lpszTargets) {
int pos = -1;
CStringKS strTargets(lpszTargets);
for (int i=0; i<GetLength(); i++) {
if (strTargets.Find(GetAt(i)) != -1) {
pos = i;
} else {
break;
}
}
if (pos >= 0) {
operator =(Mid(i));
}
}
// advanced manipulation
// replace occurrences of chOld with chNew
int Replace(TCHAR chOld, TCHAR chNew) {
int count = 0;
for (int i=0; i<GetLength(); i++) {
if (GetAt(i) == chOld) {
SetAt(i, chNew);
count++;
}
}
return count;
}
// replace occurrences of substring lpszOld with lpszNew;
// empty lpszNew removes instances of lpszOld
int Replace(LPCTSTR lpszOld, LPCTSTR lpszNew) {
int count = 0;
if (lpszOld) {
int pos = 0;
size_t len = _tcslen(lpszOld);
do {
pos = Find(lpszOld, pos);
if (pos == -1) break;
count++;
if (lpszNew) {
m_str.replace(pos, len, lpszNew);
} else {
m_str.erase(pos, len);
}
} while (true);
}
return count;
}
// remove occurrences of chRemove
int Remove(TCHAR chRemove) {
int count = 0;
int i=0;
while (i<GetLength()) {
if (GetAt(i) == chRemove) {
Delete(i);
count++;
} else {
i++;
}
}
return count;
}
// insert character at zero-based index; concatenates
// if index is past end of string
int Insert(int nIndex, TCHAR ch) {
m_str.insert(max(0, min(nIndex, GetLength())), 1, ch);
return GetLength();
}
// insert substring at zero-based index; concatenates
// if index is past end of string
int Insert(int nIndex, LPCTSTR pstr) {
if (pstr) {
m_str.insert(max(0, min(nIndex, GetLength())), pstr);
}
return GetLength();
}
// delete nCount characters starting at zero-based index
int Delete(int nIndex, int nCount = 1) {
const int iRes = GetLength();
if (nCount > 0) {
nIndex = max(0, nIndex);
nCount = min(nCount, GetLength()-nIndex);
m_str.erase(nIndex, nCount);
}
return iRes;
}
// searching
// find character starting at left, -1 if not found
int Find(TCHAR ch) const {return m_str.find(ch);}
// find character starting at right
int ReverseFind(TCHAR ch) const {return m_str.rfind(ch);}
// find character starting at zero-based index and going right
int Find(TCHAR ch, int nStart) const {return m_str.find(ch, nStart);}
// find first instance of any character in passed string
int FindOneOf(LPCTSTR lpszCharSet) const {return m_str.find_first_of(lpszCharSet);}
// find first instance of substring
int Find(LPCTSTR lpszSub) const {return m_str.find(lpszSub);}
// find first instance of substring starting at zero-based index
int Find(LPCTSTR lpszSub, int nStart) const {return m_str.find(lpszSub, nStart);}
// simple formatting
// printf-like formatting using passed string
void Format(LPCTSTR lpszFormat, ...) {
va_list arglist;
va_start(arglist, lpszFormat);
FormatV(lpszFormat, arglist);
va_end(arglist);
}
// printf-like formatting using referenced string resource
void Format(UINT nFormatID, ...) {
va_list arglist;
va_start(arglist, nFormatID);
CStringKS strLoad;
BOOL bRes = strLoad.LoadString(nFormatID);
if (bRes) {
FormatV(strLoad, arglist);
} else {
Empty();
}
va_end(arglist);
}
// printf-like formatting using variable arguments parameter
void FormatV(LPCTSTR lpszFormat, va_list argList) {
size_t sizeBuff = 512;
TCHAR *szFormat = NULL;
int write = -1;
do {
sizeBuff = sizeBuff<<1;
szFormat = new TCHAR[sizeBuff];
if (szFormat) {
szFormat[0] = 0;
write = _vsntprintf(szFormat, sizeBuff-1, lpszFormat, argList);
if (write >= 0) {
m_str = szFormat;
}
delete [] szFormat;
} else {
break;
}
} while (write < 0);
}
// formatting for localization (uses FormatMessage API)
// format using FormatMessage API on passed string
void FormatMessage(LPCTSTR lpszFormat, ...) {
va_list argList;
va_start(argList, lpszFormat);
LPTSTR lpszTemp;
if ((::FormatMessage(FORMAT_MESSAGE_FROM_STRING|FORMAT_MESSAGE_ALLOCATE_BUFFER,lpszFormat, 0, 0, (LPTSTR)&lpszTemp, 0, &argList) == 0) &&
(lpszTemp == NULL))
{
*this = lpszTemp;
LocalFree(lpszTemp);
}
va_end(argList);
}
// format using FormatMessage API on referenced string resource
void FormatMessage(UINT nFormatID, ...) {
CStringKS strFormat;
if (strFormat.LoadString(nFormatID)) {
va_list argList;
va_start(argList, nFormatID);
LPTSTR lpszTemp;
if ((::FormatMessage(FORMAT_MESSAGE_FROM_STRING|FORMAT_MESSAGE_ALLOCATE_BUFFER, strFormat, 0, 0, (LPTSTR)&lpszTemp, 0, &argList) == 0) &&
(lpszTemp == NULL))
{
*this = lpszTemp;
LocalFree(lpszTemp);
}
va_end(argList);
}
}
// input and output
//friend CArchive& operator<<(CArchive& ar, const CStringKS& string);
//friend CArchive& operator>>(CArchive& ar, CStringKS& string);
// load from string resource
BOOL LoadString(UINT nID) {
size_t sizeBuff = 512;
bool bRepeat;
int iRes = 0;
TCHAR *szFormat = NULL;
do {
sizeBuff = sizeBuff<<1;
szFormat = new TCHAR[sizeBuff];
if (szFormat) {
szFormat[0] = 0;
iRes = ::LoadString(::GetModuleHandle(NULL), nID, szFormat, sizeBuff);
bRepeat = (iRes+1 >= sizeBuff);
if (!bRepeat) {
m_str = szFormat;
}
delete [] szFormat;
} else {
break;
}
} while (bRepeat);
return (iRes > 0);
}
#ifndef _UNICODE
// ANSI <-> OEM support (convert string in place)
// convert string from ANSI to OEM in-place
void AnsiToOem() {::CharToOem((LPCTSTR)this->operator LPCTSTR(), (LPSTR) this->operator LPCTSTR());}
// convert string from OEM to ANSI in-place
void OemToAnsi() {::OemToChar((LPCSTR) this->operator LPCTSTR(), (LPTSTR)this->operator LPCTSTR());}
#endif
#ifndef _AFX_NO_BSTR_SUPPORT
// OLE BSTR support (use for OLE automation)
// return a BSTR initialized with this CStringKS's data
BSTR AllocSysString() const {USES_CONVERSION; return SysAllocString(T2COLE(m_str.c_str()));}
// reallocates the passed BSTR, copies content of this CStringKS to it
BSTR SetSysString(BSTR* pbstr) const {BSTR szRes = AllocSysString(); if (pbstr) {::SysFreeString(*pbstr); *pbstr=szRes;} return szRes;}
#endif
// Access to string implementation buffer as "C" character array
// get pointer to modifiable buffer at least as long as nMinBufLength
LPTSTR GetBuffer(int nMinBufLength) {
if (GetLength() < nMinBufLength) {
m_str.resize(nMinBufLength);
}
return (LPTSTR)this->operator LPCTSTR();
}
// release buffer, setting length to nNewLength (or to first nul if -1)
void ReleaseBuffer(int nNewLength = -1) {
if (nNewLength != -1) {
nNewLength = max(0, nNewLength);
m_str.resize(nNewLength);
}
FreeExtra();
}
// get pointer to modifiable buffer exactly as long as nNewLength
LPTSTR GetBufferSetLength(int nNewLength) { return GetBuffer(nNewLength);}
// release memory allocated to but unused by string
void FreeExtra() {
int pos = Find(_T('\0'));
if (pos != -1) {
m_str.resize(pos);
}
}
// Use LockBuffer/UnlockBuffer to turn refcounting off
// turn refcounting back on
LPTSTR LockBuffer();
// turn refcounting off
void UnlockBuffer();
// Implementation
public:
~CStringKS() {}
int GetAllocLength() const {return GetLength();};
};
// Compare helpers
__forceinline bool operator==(const CStringKS& s1, const CStringKS& s2) { return (s1.Compare(s2) == 0); }
__forceinline bool operator==(const CStringKS& s1, LPCTSTR s2) { return (s1.Compare(s2) == 0); }
__forceinline bool operator==(LPCTSTR s1, const CStringKS& s2) { return (s2.Compare(s1) == 0); }
__forceinline bool operator!=(const CStringKS& s1, const CStringKS& s2) { return (s1.Compare(s2) != 0); }
__forceinline bool operator!=(const CStringKS& s1, LPCTSTR s2) { return (s1.Compare(s2) != 0); }
__forceinline bool operator!=(LPCTSTR s1, const CStringKS& s2) { return (s2.Compare(s1) != 0); }
__forceinline bool operator<(const CStringKS& s1, const CStringKS& s2) { return (s1.Compare(s2) < 0); }
__forceinline bool operator<(const CStringKS& s1, LPCTSTR s2) { return (s1.Compare(s2) < 0); }
__forceinline bool operator<(LPCTSTR s1, const CStringKS& s2) { return (s2.Compare(s1) > 0); }
__forceinline bool operator>(const CStringKS& s1, const CStringKS& s2) { return (s1.Compare(s2) > 0); }
__forceinline bool operator>(const CStringKS& s1, LPCTSTR s2) { return (s1.Compare(s2) > 0); }
__forceinline bool operator>(LPCTSTR s1, const CStringKS& s2) { return (s2.Compare(s1) < 0); }
__forceinline bool operator<=(const CStringKS& s1, const CStringKS& s2) { return (s1.Compare(s2) <= 0); }
__forceinline bool operator<=(const CStringKS& s1, LPCTSTR s2) { return (s1.Compare(s2) <= 0); }
__forceinline bool operator<=(LPCTSTR s1, const CStringKS& s2) { return (s2.Compare(s1) >= 0); }
__forceinline bool operator>=(const CStringKS& s1, const CStringKS& s2) { return (s1.Compare(s2) >= 0); }
__forceinline bool operator>=(const CStringKS& s1, LPCTSTR s2) { return (s1.Compare(s2) >= 0); }
__forceinline bool operator>=(LPCTSTR s1, const CStringKS& s2) { return (s2.Compare(s1) <= 0); }
#ifndef __AFX_H__
typedef CStringKS CString;
#endif
#endif // __FILE__CSTRINGKS__
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CString in Win32 project 
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