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////////////////////////////////////////////////////////////////////// // StringEx.cpp // #include "stdafx.h" #include "StringEx.h" // Insert - Inserts a sub string into the string // Returns - Reference to the same string object // pos - Position to insert at. Extends the string with spaces if needed // s - Sub string to insert CStringEx& CStringEx::Insert(int pos, LPCTSTR s) { int len = lstrlen(s); if ( len == 0 ) return *this; int oldlen = GetLength(); int newlen = oldlen + len; LPTSTR str; if ( pos >= oldlen ) { // insert after end of string newlen += pos - oldlen ; str = GetBuffer( newlen ); _tcsnset( str+oldlen, _T(' '), pos-oldlen ); _tcsncpy( str+pos, s, len ); } else { // normal insert str = GetBuffer( newlen ); memmove( str+pos+len, str+pos, sizeof(_T(' ')) *(oldlen-pos) ); _tcsncpy( str+pos, s, len ); } ReleaseBuffer( newlen ); return *this; } // Insert - Inserts a character into the string // Returns - Reference to the same string object // pos - Position to insert at. Extends the string with spaces if needed // c - Char to insert CStringEx& CStringEx::Insert(int pos, TCHAR c) { TCHAR buf[2]; buf[0] = c; buf[1] = _T('\0'); return Insert( pos, buf ); } // Delete - Deletes a segment of the string and resizes it // Returns - Reference to the same string object // pos - Position of the string segment to remove // len - Number of characters to remove CStringEx& CStringEx::Delete(int pos, int len) { int strLen = GetLength(); if( pos >= strLen) return *this; if(len < 0 ||len > strLen - pos) len = strLen - pos; LPTSTR str = GetBuffer( strLen ); memmove(str+pos, str+pos+len, sizeof(_T(' ')) *(strLen-(pos+len))); ReleaseBuffer( strLen - len ); return *this; } // Replace - Replaces a substring with another // Returns - Reference to the same string object // pos - Position of the substring // len - Length of substring to be replaced // s - New substring CStringEx& CStringEx::Replace(int pos, int len, LPCTSTR s) { Delete(pos, len); Insert(pos, s); return *this; } // Find - Finds the position of a character in a string // Returns - A zero-based index // ch - Character to look for // startpos - Position to start looking from int CStringEx::Find( TCHAR ch, int startpos /*= 0*/ ) const { // find first single character LPTSTR lpsz = _tcschr(m_pchData + startpos, (_TUCHAR)ch); // return -1 if not found and index otherwise return (lpsz == NULL) ? -1 : (int)(lpsz - m_pchData); } // Find - Finds the position of a substring in a string // Returns - A zero-based index // lpszSub - Substring to look for // startpos - Position to start looking from int CStringEx::Find( LPCTSTR lpszSub, int startpos /*= 0*/ ) const { ASSERT(AfxIsValidString(lpszSub, FALSE)); // find first matching substring LPTSTR lpsz = _tcsstr(m_pchData+startpos, lpszSub); // return -1 for not found, distance from beginning otherwise return (lpsz == NULL) ? -1 : (int)(lpsz - m_pchData); } // FindNoCase - Case insensitive find // Returns - A zero-based index // ch - Char to search for // startpos - Position to start looking from int CStringEx::FindNoCase( TCHAR ch, int startpos /*= 0*/ ) const { unsigned int locase = Find( tolower( ch ), startpos ); unsigned int upcase = Find( toupper( ch ), startpos ); return locase < upcase ? locase : upcase; } // FindNoCase - Case insensitive find // Returns - A zero-based index // lpszSub - Substring to search for // startpos - Position to start looking from int CStringEx::FindNoCase( LPCTSTR lpszSub, int startpos /*= 0*/ ) const { CStringEx sLowerThis = *this; sLowerThis.MakeLower(); CStringEx sLowerSub = lpszSub; sLowerSub.MakeLower(); return sLowerThis.Find( sLowerSub, startpos ); } // FindReplace - Find a substring and replace with another // Returns - Number of instances replaced // lpszSub - Substring to look for // lpszReplaceWith - Substring to replace with // bGlobal - Flag to indicate whether all occurances // should be replaced int CStringEx::FindReplace( LPCTSTR lpszSub, LPCTSTR lpszReplaceWith, BOOL bGlobal /*= TRUE*/ ) { int iReplaced = 0; // find first matching substring LPTSTR lpsz; int pos = 0; int lenSub = lstrlen( lpszSub ); int lenReplaceWith = lstrlen( lpszReplaceWith ); while( (lpsz = _tcsstr(m_pchData + pos, lpszSub)) != NULL ) { pos = (int)(lpsz - m_pchData); Replace( pos, lenSub, lpszReplaceWith ); pos += lenReplaceWith; iReplaced++; if( !bGlobal ) break; } return iReplaced; } // FindReplaceNoCase - Find a substring and replace with another // Does case insensitive search // Returns - Number of instances replaced // lpszSub - Substring to look for // lpszReplaceWith - Substring to replace with // bGlobal - Flag to indicate whether all occurances // should be replaced int CStringEx::FindReplaceNoCase( LPCTSTR lpszSub, LPCTSTR lpszReplaceWith, BOOL bGlobal /*= TRUE*/ ) { CStringEx sLowerThis = *this; sLowerThis.MakeLower(); CStringEx sLowerSub = lpszSub; sLowerSub.MakeLower(); int iReplaced = 0; // find first matching substring LPTSTR lpsz; int pos = 0, offset = 0; int lenSub = lstrlen( lpszSub ); int lenReplaceWith = lstrlen( lpszReplaceWith ); while( (lpsz = _tcsstr(sLowerThis.m_pchData + pos, sLowerSub.m_pchData)) != NULL ) { pos = (int)(lpsz - sLowerThis.m_pchData); Replace( pos+offset, lenSub, lpszReplaceWith ); offset += lenReplaceWith - lenSub; pos += lenSub; iReplaced++; if( !bGlobal ) break; } return iReplaced; } // ReverseFind - Searches for the last match of a substring // Returns - A zero-based index // lpszSub - Substring to search for // startpos - Position to start looking from, in reverse dir int CStringEx::ReverseFind( LPCTSTR lpszSub, int startpos /*= -1*/ ) const { int lenSub = lstrlen( lpszSub ); int len = lstrlen( m_pchData ); if(0 < lenSub && 0 < len) { if( startpos == -1 || startpos >= len ) startpos = len - 1; for ( LPTSTR lpszReverse = m_pchData + startpos ; lpszReverse != m_pchData ; --lpszReverse) if (_tcsncmp(lpszSub, lpszReverse, lenSub ) == 0) return (lpszReverse - m_pchData); } return -1; } // ReverseFindNoCase - Searches for the last match of a substring // Search is case insensitive // Returns - A zero-based index // lpszSub - Character to search for // startpos - Position to start looking from, in reverse dir int CStringEx::ReverseFindNoCase(TCHAR ch, int startpos /*= -1*/ ) const { TCHAR a[2]; a[1] = ch; a[2] = 0; return ReverseFindNoCase( a, startpos ); } // ReverseFindNoCase - Searches for the last match of a substring // Search is case insensitive // Returns - A zero-based index // lpszSub - Substring to search for // startpos - Position to start looking from, in reverse dir int CStringEx::ReverseFindNoCase( LPCTSTR lpszSub, int startpos /*= -1*/ ) const { //LPTSTR lpszEnd = m_pchData + lstrlen int lenSub = lstrlen( lpszSub ); int len = lstrlen( m_pchData ); if(0 < lenSub && 0 < len) { if( startpos == -1 || startpos >= len ) startpos = len - 1; for ( LPTSTR lpszReverse = m_pchData + startpos ; lpszReverse >= m_pchData ; --lpszReverse) if (_tcsnicmp(lpszSub, lpszReverse, lenSub ) == 0) return (lpszReverse - m_pchData); } return -1; } // GetField - Gets a delimited field // Returns - A CStringEx object that contains a copy of // the specified field // delim - The delimiter string // fieldnum - The field index - zero is the first // NOTE - Returns the whole string for field zero // if delim not found // Returns empty string if # of delim found // is less than fieldnum CStringEx CStringEx::GetField( LPCTSTR delim