X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0be9ace27e0a278272cbb1e9daa988b65898eca1..ccb5db57cdb1766eefb7023dda50ede9f0d01f78:/src/common/string.cpp diff --git a/src/common/string.cpp b/src/common/string.cpp index c43bde8e7d..c2bab603e2 100644 --- a/src/common/string.cpp +++ b/src/common/string.cpp @@ -1,18 +1,15 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: string.cpp +// Name: src/common/string.cpp // Purpose: wxString class -// Author: Vadim Zeitlin +// Author: Vadim Zeitlin, Ryan Norton // Modified by: // Created: 29/01/98 // RCS-ID: $Id$ // Copyright: (c) 1998 Vadim Zeitlin +// (c) 2004 Ryan Norton // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ - #pragma implementation "string.h" -#endif - /* * About ref counting: * 1) all empty strings use g_strEmpty, nRefs = -1 (set in Init()) @@ -28,14 +25,13 @@ #include "wx/wxprec.h" #ifdef __BORLANDC__ - #pragma hdrstop + #pragma hdrstop #endif #ifndef WX_PRECOMP - #include "wx/defs.h" - #include "wx/string.h" - #include "wx/intl.h" - #include "wx/thread.h" + #include "wx/string.h" + #include "wx/intl.h" + #include "wx/thread.h" #endif #include @@ -43,7 +39,7 @@ #include #ifdef __SALFORDC__ - #include + #include #endif // allocating extra space for each string consumes more memory but speeds up @@ -55,20 +51,21 @@ // static class variables definition // --------------------------------------------------------------------------- -#if defined(__VISAGECPP__) && __IBMCPP__ >= 400 -// must define this static for VA or else you get multiply defined symbols -// everywhere -const unsigned int wxSTRING_MAXLEN = UINT_MAX - 100; -#endif // Visual Age - -#ifdef wxSTD_STRING_COMPATIBILITY - const size_t wxString::npos = wxSTRING_MAXLEN; -#endif // wxSTD_STRING_COMPATIBILITY +#if !wxUSE_STL + //According to STL _must_ be a -1 size_t + const size_t wxStringBase::npos = (size_t) -1; +#endif // ---------------------------------------------------------------------------- // static data // ---------------------------------------------------------------------------- +#if wxUSE_STL + +extern const wxChar WXDLLIMPEXP_BASE *wxEmptyString = _T(""); + +#else + // for an empty string, GetStringData() will return this address: this // structure has the same layout as wxStringData and it's data() method will // return the empty string (dummy pointer) @@ -81,55 +78,27 @@ static const struct // empty C style string: points to 'string data' byte of g_strEmpty extern const wxChar WXDLLIMPEXP_BASE *wxEmptyString = &g_strEmpty.dummy; +#endif + // ---------------------------------------------------------------------------- // global functions // ---------------------------------------------------------------------------- -#if defined(wxSTD_STRING_COMPATIBILITY) && wxUSE_STD_IOSTREAM - -// MS Visual C++ version 5.0 provides the new STL headers as well as the old -// iostream ones. -// -// ATTN: you can _not_ use both of these in the same program! - -wxSTD istream& operator>>(wxSTD istream& is, wxString& WXUNUSED(str)) -{ -#if 0 - int w = is.width(0); - if ( is.ipfx(0) ) { - streambuf *sb = is.rdbuf(); - str.erase(); - while ( true ) { - int ch = sb->sbumpc (); - if ( ch == EOF ) { - is.setstate(ios::eofbit); - break; - } - else if ( isspace(ch) ) { - sb->sungetc(); - break; - } - - str += ch; - if ( --w == 1 ) - break; - } - } +#if wxUSE_STD_IOSTREAM - is.isfx(); - if ( str.length() == 0 ) - is.setstate(ios::failbit); -#endif - return is; -} +#include wxSTD ostream& operator<<(wxSTD ostream& os, const wxString& str) { - os << str.c_str(); - return os; +#ifdef __BORLANDC__ + os << str.mb_str(); +#else + os << str.c_str(); +#endif + return os; } -#endif //std::string compatibility +#endif // wxUSE_STD_IOSTREAM // ---------------------------------------------------------------------------- // private classes @@ -160,6 +129,8 @@ wxSTD ostream& operator<<(wxSTD ostream& os, const wxString& str) #define STATISTICS_ADD(av, val) #endif // WXSTRING_STATISTICS +#if !wxUSE_STL + // =========================================================================== // wxStringData class deallocation // =========================================================================== @@ -173,41 +144,16 @@ void wxStringData::Free() #endif // =========================================================================== -// wxString class core +// wxStringBase // =========================================================================== -// --------------------------------------------------------------------------- -// construction -// --------------------------------------------------------------------------- - -// constructs string of copies of character -wxString::wxString(wxChar ch, size_t nLength) -{ - Init(); - - if ( nLength > 0 ) { - if ( !AllocBuffer(nLength) ) { - wxFAIL_MSG( _T("out of memory in wxString::wxString") ); - return; - } - -#if wxUSE_UNICODE - // memset only works on chars - for ( size_t n = 0; n < nLength; n++ ) - m_pchData[n] = ch; -#else - memset(m_pchData, ch, nLength); -#endif - } -} - // takes nLength elements of psz starting at nPos -void wxString::InitWith(const wxChar *psz, size_t nPos, size_t nLength) +void wxStringBase::InitWith(const wxChar *psz, size_t nPos, size_t nLength) { Init(); // if the length is not given, assume the string to be NUL terminated - if ( nLength == wxSTRING_MAXLEN ) { + if ( nLength == npos ) { wxASSERT_MSG( nPos <= wxStrlen(psz), _T("index out of bounds") ); nLength = wxStrlen(psz + nPos); @@ -218,119 +164,40 @@ void wxString::InitWith(const wxChar *psz, size_t nPos, size_t nLength) if ( nLength > 0 ) { // trailing '\0' is written in AllocBuffer() if ( !AllocBuffer(nLength) ) { - wxFAIL_MSG( _T("out of memory in wxString::InitWith") ); + wxFAIL_MSG( _T("out of memory in wxStringBase::InitWith") ); return; } - memcpy(m_pchData, psz + nPos, nLength*sizeof(wxChar)); + wxTmemcpy(m_pchData, psz + nPos, nLength); } } -#ifdef wxSTD_STRING_COMPATIBILITY - // poor man's iterators are "void *" pointers -wxString::wxString(const void *pStart, const void *pEnd) +wxStringBase::wxStringBase(const void *pStart, const void *pEnd) { - InitWith((const wxChar *)pStart, 0, - (const wxChar *)pEnd - (const wxChar *)pStart); -} - -#endif //std::string compatibility - -#if wxUSE_UNICODE - -// from multibyte string -wxString::wxString(const char *psz, wxMBConv& conv, size_t nLength) -{ - // first get the size of the buffer we need - size_t nLen; - if ( psz ) - { - // calculate the needed size ourselves or use the provided one - nLen = nLength == wxSTRING_MAXLEN ? conv.MB2WC(NULL, psz, 0) : nLength; - } - else - { - // nothing to convert - nLen = 0; - } - - // anything to do? - if ( (nLen != 0) && (nLen != (size_t)-1) ) - { - if ( !AllocBuffer(nLen) ) - { - wxFAIL_MSG( _T("out of memory in wxString::wxString") ); - } - else - { - // MB2WC wants the buffer size, not the string length hence +1 - nLen = conv.MB2WC(m_pchData, psz, nLen + 1); - - if ( nLen != (size_t)-1 ) - { - // initialized ok, set the real length as nLength specified by - // the caller could be greater than the real string length - GetStringData()->nDataLength = nLen; - m_pchData[nLen] = 0; - return; - } - //else: the conversion failed -- leave the string empty (what else?) - } - } - + if ( pEnd >= pStart ) + { + InitWith((const wxChar *)pStart, 0, + (const wxChar *)pEnd - (const wxChar *)pStart); + } + else + { + wxFAIL_MSG( _T("pStart is not before pEnd") ); Init(); + } } -#else // ANSI - -#if wxUSE_WCHAR_T -// from wide string -wxString::wxString(const wchar_t *pwz, wxMBConv& conv, size_t nLength) +wxStringBase::wxStringBase(size_type n, wxChar ch) { - // first get the size of the buffer we need - size_t nLen; - if ( pwz ) - { - // calculate the needed size ourselves or use the provided one - nLen = nLength == wxSTRING_MAXLEN ? conv.WC2MB(NULL, pwz, 0) : nLength; - } - else - { - // nothing to convert - nLen = 0; - } - - // anything to do? - if ( (nLen != 0) && (nLen != (size_t)-1) ) - { - if ( !AllocBuffer(nLen) ) - { - wxFAIL_MSG( _T("out of memory in wxString::wxString") ); - } - else - { - // WC2MB wants the buffer size, not the string length - if ( conv.WC2MB(m_pchData, pwz, nLen + 1) != (size_t)-1 ) - { - // initialized ok - return; - } - //else: the conversion failed -- leave the string empty (what else?) - } - } - - Init(); + Init(); + append(n, ch); } -#endif // wxUSE_WCHAR_T - -#endif // Unicode/ANSI // --------------------------------------------------------------------------- // memory allocation // --------------------------------------------------------------------------- // allocates memory needed to store a C string of length nLen -bool wxString::AllocBuffer(size_t nLen) +bool wxStringBase::AllocBuffer(size_t nLen) { // allocating 0 sized buffer doesn't make sense, all empty strings should // reuse g_strEmpty @@ -350,7 +217,7 @@ bool wxString::AllocBuffer(size_t nLen) if ( pData == NULL ) { // allocation failures are handled by the caller - return FALSE; + return false; } pData->nRefs = 1; @@ -358,11 +225,11 @@ bool wxString::AllocBuffer(size_t nLen) pData->nAllocLength = nLen + EXTRA_ALLOC; m_pchData = pData->data(); // data starts after wxStringData m_pchData[nLen] = wxT('\0'); - return TRUE; + return true; } // must be called before changing this string -bool wxString::CopyBeforeWrite() +bool wxStringBase::CopyBeforeWrite() { wxStringData* pData = GetStringData(); @@ -371,18 +238,18 @@ bool wxString::CopyBeforeWrite() size_t nLen = pData->nDataLength; if ( !AllocBuffer(nLen) ) { // allocation failures are handled by the caller - return FALSE; + return false; } - memcpy(m_pchData, pData->data(), nLen*sizeof(wxChar)); + wxTmemcpy(m_pchData, pData->data(), nLen); } wxASSERT( !GetStringData()->IsShared() ); // we must be the only owner - return TRUE; + return true; } // must be called before replacing contents of this string -bool wxString::AllocBeforeWrite(size_t nLen) +bool wxStringBase::AllocBeforeWrite(size_t nLen) { wxASSERT( nLen != 0 ); // doesn't make any sense @@ -393,7 +260,7 @@ bool wxString::AllocBeforeWrite(size_t nLen) pData->Unlock(); if ( !AllocBuffer(nLen) ) { // allocation failures are handled by the caller - return FALSE; + return false; } } else { @@ -410,36 +277,67 @@ bool wxString::AllocBeforeWrite(size_t nLen) if ( pData == NULL ) { // allocation failures are handled by the caller // keep previous data since reallocation failed - return FALSE; + return false; } pData->nAllocLength = nLen; m_pchData = pData->data(); } - - // now we have enough space, just update the string length - pData->nDataLength = nLen; } wxASSERT( !GetStringData()->IsShared() ); // we must be the only owner - return TRUE; + // it doesn't really matter what the string length is as it's going to be + // overwritten later but, for extra safety, set it to 0 for now as we may + // have some junk in m_pchData + GetStringData()->nDataLength = 0; + + return true; +} + +wxStringBase& wxStringBase::append(size_t n, wxChar ch) +{ + size_type len = length(); + + if ( !Alloc(len + n) || !CopyBeforeWrite() ) { + wxFAIL_MSG( _T("out of memory in wxStringBase::append") ); + } + GetStringData()->nDataLength = len + n; + m_pchData[len + n] = '\0'; + for ( size_t i = 0; i < n; ++i ) + m_pchData[len + i] = ch; + return *this; +} + +void wxStringBase::resize(size_t nSize, wxChar ch) +{ + size_t len = length(); + + if ( nSize < len ) + { + erase(begin() + nSize, end()); + } + else if ( nSize > len ) + { + append(nSize - len, ch); + } + //else: we have exactly the specified length, nothing to do } // allocate enough memory for nLen characters -bool wxString::Alloc(size_t nLen) +bool wxStringBase::Alloc(size_t nLen) { wxStringData *pData = GetStringData(); if ( pData->nAllocLength <= nLen ) { if ( pData->IsEmpty() ) { nLen += EXTRA_ALLOC; - wxStringData* pData = (wxStringData*) - malloc(sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar)); + pData = (wxStringData *) + malloc(sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar)); if ( pData == NULL ) { // allocation failure handled by caller - return FALSE; + return false; } pData->nRefs = 1; @@ -453,9 +351,11 @@ bool wxString::Alloc(size_t nLen) size_t nOldLen = pData->nDataLength; if ( !AllocBuffer(nLen) ) { // allocation failure handled by caller - return FALSE; + return false; } - memcpy(m_pchData, pData->data(), nOldLen*sizeof(wxChar)); + // +1 to copy the terminator, too + memcpy(m_pchData, pData->data(), (nOldLen+1)*sizeof(wxChar)); + GetStringData()->nDataLength = nOldLen; } else { nLen += EXTRA_ALLOC; @@ -466,7 +366,7 @@ bool wxString::Alloc(size_t nLen) if ( pData == NULL ) { // allocation failure handled by caller // keep previous data since reallocation failed - return FALSE; + return false; } // it's not important if the pointer changed or not (the check for this @@ -476,176 +376,478 @@ bool wxString::Alloc(size_t nLen) } } //else: we've already got enough - return TRUE; + return true; } -// shrink to minimal size (releasing extra memory) -bool wxString::Shrink() +wxStringBase::iterator wxStringBase::begin() { - wxStringData *pData = GetStringData(); - - size_t nLen = pData->nDataLength; - void *p = realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar)); - - if ( p == NULL) { - wxFAIL_MSG( _T("out of memory reallocating wxString data") ); - // keep previous data since reallocation failed - return FALSE; - } + if (length() > 0) + CopyBeforeWrite(); + return m_pchData; +} - if ( p != pData ) - { - // contrary to what one might believe, some realloc() implementation do - // move the memory block even when its size is reduced - pData = (wxStringData *)p; +wxStringBase::iterator wxStringBase::end() +{ + if (length() > 0) + CopyBeforeWrite(); + return m_pchData + length(); +} - m_pchData = pData->data(); - } +wxStringBase::iterator wxStringBase::erase(iterator it) +{ + size_type idx = it - begin(); + erase(idx, 1); + return begin() + idx; +} - pData->nAllocLength = nLen; +wxStringBase& wxStringBase::erase(size_t nStart, size_t nLen) +{ + wxASSERT(nStart <= length()); + size_t strLen = length() - nStart; + // delete nLen or up to the end of the string characters + nLen = strLen < nLen ? strLen : nLen; + wxString strTmp(c_str(), nStart); + strTmp.append(c_str() + nStart + nLen, length() - nStart - nLen); - return TRUE; + swap(strTmp); + return *this; } -// get the pointer to writable buffer of (at least) nLen bytes -wxChar *wxString::GetWriteBuf(size_t nLen) +wxStringBase& wxStringBase::insert(size_t nPos, const wxChar *sz, size_t n) { - if ( !AllocBeforeWrite(nLen) ) { - // allocation failure handled by caller - return NULL; - } + wxASSERT( nPos <= length() ); - wxASSERT( GetStringData()->nRefs == 1 ); - GetStringData()->Validate(FALSE); + if ( n == npos ) n = wxStrlen(sz); + if ( n == 0 ) return *this; - return m_pchData; + if ( !Alloc(length() + n) || !CopyBeforeWrite() ) { + wxFAIL_MSG( _T("out of memory in wxStringBase::insert") ); + } + + memmove(m_pchData + nPos + n, m_pchData + nPos, + (length() - nPos) * sizeof(wxChar)); + memcpy(m_pchData + nPos, sz, n * sizeof(wxChar)); + GetStringData()->nDataLength = length() + n; + m_pchData[length()] = '\0'; + + return *this; } -// put string back in a reasonable state after GetWriteBuf -void wxString::UngetWriteBuf() +void wxStringBase::swap(wxStringBase& str) { - GetStringData()->nDataLength = wxStrlen(m_pchData); - GetStringData()->Validate(TRUE); + wxChar* tmp = str.m_pchData; + str.m_pchData = m_pchData; + m_pchData = tmp; } -void wxString::UngetWriteBuf(size_t nLen) +size_t wxStringBase::find(const wxStringBase& str, size_t nStart) const { - GetStringData()->nDataLength = nLen; - GetStringData()->Validate(TRUE); -} + // deal with the special case of empty string first + const size_t nLen = length(); + const size_t nLenOther = str.length(); -// --------------------------------------------------------------------------- -// data access -// --------------------------------------------------------------------------- + if ( !nLenOther ) + { + // empty string is a substring of anything + return 0; + } -// all functions are inline in string.h + if ( !nLen ) + { + // the other string is non empty so can't be our substring + return npos; + } -// --------------------------------------------------------------------------- -// assignment operators -// --------------------------------------------------------------------------- + wxASSERT( str.GetStringData()->IsValid() ); + wxASSERT( nStart <= nLen ); -// helper function: does real copy -bool wxString::AssignCopy(size_t nSrcLen, const wxChar *pszSrcData) -{ - if ( nSrcLen == 0 ) { - Reinit(); - } - else { - if ( !AllocBeforeWrite(nSrcLen) ) { - // allocation failure handled by caller - return FALSE; - } - memcpy(m_pchData, pszSrcData, nSrcLen*sizeof(wxChar)); - GetStringData()->nDataLength = nSrcLen; - m_pchData[nSrcLen] = wxT('\0'); - } - return TRUE; -} + const wxChar * const other = str.c_str(); -// assigns one string to another -wxString& wxString::operator=(const wxString& stringSrc) -{ - wxASSERT( stringSrc.GetStringData()->IsValid() ); + // anchor + const wxChar* p = (const wxChar*)wxTmemchr(c_str() + nStart, + *other, + nLen - nStart); - // don't copy string over itself - if ( m_pchData != stringSrc.m_pchData ) { - if ( stringSrc.GetStringData()->IsEmpty() ) { - Reinit(); - } - else { - // adjust references - GetStringData()->Unlock(); - m_pchData = stringSrc.m_pchData; - GetStringData()->Lock(); + if ( !p ) + return npos; + + while ( p - c_str() + nLenOther <= nLen && wxTmemcmp(p, other, nLenOther) ) + { + p++; + + // anchor again + p = (const wxChar*)wxTmemchr(p, *other, nLen - (p - c_str())); + + if ( !p ) + return npos; } - } - return *this; + return p - c_str() + nLenOther <= nLen ? p - c_str() : npos; } -// assigns a single character -wxString& wxString::operator=(wxChar ch) +size_t wxStringBase::find(const wxChar* sz, size_t nStart, size_t n) const { - if ( !AssignCopy(1, &ch) ) { - wxFAIL_MSG( _T("out of memory in wxString::operator=(wxChar)") ); - } - return *this; + return find(wxStringBase(sz, n), nStart); } - -// assigns C string -wxString& wxString::operator=(const wxChar *psz) +size_t wxStringBase::find(wxChar ch, size_t nStart) const { - if ( !AssignCopy(wxStrlen(psz), psz) ) { - wxFAIL_MSG( _T("out of memory in wxString::operator=(const wxChar *)") ); - } - return *this; -} + wxASSERT( nStart <= length() ); -#if !wxUSE_UNICODE + const wxChar *p = (const wxChar*)wxTmemchr(c_str() + nStart, ch, length() - nStart); -// same as 'signed char' variant -wxString& wxString::operator=(const unsigned char* psz) -{ - *this = (const char *)psz; - return *this; + return p == NULL ? npos : p - c_str(); } -#if wxUSE_WCHAR_T -wxString& wxString::operator=(const wchar_t *pwz) +size_t wxStringBase::rfind(const wxStringBase& str, size_t nStart) const { - wxString str(pwz); - *this = str; - return *this; -} -#endif + wxASSERT( str.GetStringData()->IsValid() ); + wxASSERT( nStart == npos || nStart <= length() ); -#endif + if ( length() >= str.length() ) + { + // avoids a corner case later + if ( length() == 0 && str.length() == 0 ) + return 0; -// --------------------------------------------------------------------------- -// string concatenation -// --------------------------------------------------------------------------- + // "top" is the point where search starts from + size_t top = length() - str.length(); -// add something to this string -bool wxString::ConcatSelf(size_t nSrcLen, const wxChar *pszSrcData) -{ - STATISTICS_ADD(SummandLength, nSrcLen); + if ( nStart == npos ) + nStart = length() - 1; + if ( nStart < top ) + top = nStart; - // concatenating an empty string is a NOP - if ( nSrcLen > 0 ) { - wxStringData *pData = GetStringData(); - size_t nLen = pData->nDataLength; - size_t nNewLen = nLen + nSrcLen; + const wxChar *cursor = c_str() + top; + do + { + if ( wxTmemcmp(cursor, str.c_str(), + str.length()) == 0 ) + { + return cursor - c_str(); + } + } while ( cursor-- > c_str() ); + } - // alloc new buffer if current is too small - if ( pData->IsShared() ) { - STATISTICS_ADD(ConcatHit, 0); + return npos; +} - // we have to allocate another buffer - wxStringData* pOldData = GetStringData(); - if ( !AllocBuffer(nNewLen) ) { - // allocation failure handled by caller - return FALSE; +size_t wxStringBase::rfind(const wxChar* sz, size_t nStart, size_t n) const +{ + return rfind(wxStringBase(sz, n), nStart); +} + +size_t wxStringBase::rfind(wxChar ch, size_t nStart) const +{ + if ( nStart == npos ) + { + nStart = length(); + } + else + { + wxASSERT( nStart <= length() ); + } + + const wxChar *actual; + for ( actual = c_str() + ( nStart == npos ? length() : nStart + 1 ); + actual > c_str(); --actual ) + { + if ( *(actual - 1) == ch ) + return (actual - 1) - c_str(); + } + + return npos; +} + +size_t wxStringBase::find_first_of(const wxChar* sz, size_t nStart) const +{ + wxASSERT(nStart <= length()); + + size_t len = wxStrlen(sz); + + size_t i; + for(i = nStart; i < this->length(); ++i) + { + if (wxTmemchr(sz, *(c_str() + i), len)) + break; + } + + if(i == this->length()) + return npos; + else + return i; +} + +size_t wxStringBase::find_first_of(const wxChar* sz, size_t nStart, + size_t n) const +{ + return find_first_of(wxStringBase(sz, n), nStart); +} + +size_t wxStringBase::find_last_of(const wxChar* sz, size_t nStart) const +{ + if ( nStart == npos ) + { + nStart = length() - 1; + } + else + { + wxASSERT_MSG( nStart <= length(), + _T("invalid index in find_last_of()") ); + } + + size_t len = wxStrlen(sz); + + for ( const wxChar *p = c_str() + nStart; p >= c_str(); --p ) + { + if ( wxTmemchr(sz, *p, len) ) + return p - c_str(); + } + + return npos; +} + +size_t wxStringBase::find_last_of(const wxChar* sz, size_t nStart, + size_t n) const +{ + return find_last_of(wxStringBase(sz, n), nStart); +} + +size_t wxStringBase::find_first_not_of(const wxChar* sz, size_t nStart) const +{ + if ( nStart == npos ) + { + nStart = length(); + } + else + { + wxASSERT( nStart <= length() ); + } + + size_t len = wxStrlen(sz); + + size_t i; + for(i = nStart; i < this->length(); ++i) + { + if (!wxTmemchr(sz, *(c_str() + i), len)) + break; + } + + if(i == this->length()) + return npos; + else + return i; +} + +size_t wxStringBase::find_first_not_of(const wxChar* sz, size_t nStart, + size_t n) const +{ + return find_first_not_of(wxStringBase(sz, n), nStart); +} + +size_t wxStringBase::find_first_not_of(wxChar ch, size_t nStart) const +{ + wxASSERT( nStart <= length() ); + + for ( const wxChar *p = c_str() + nStart; *p; p++ ) + { + if ( *p != ch ) + return p - c_str(); + } + + return npos; +} + +size_t wxStringBase::find_last_not_of(const wxChar* sz, size_t nStart) const +{ + if ( nStart == npos ) + { + nStart = length() - 1; + } + else + { + wxASSERT( nStart <= length() ); + } + + size_t len = wxStrlen(sz); + + for ( const wxChar *p = c_str() + nStart; p >= c_str(); --p ) + { + if ( !wxTmemchr(sz, *p,len) ) + return p - c_str(); + } + + return npos; +} + +size_t wxStringBase::find_last_not_of(const wxChar* sz, size_t nStart, + size_t n) const +{ + return find_last_not_of(wxStringBase(sz, n), nStart); +} + +size_t wxStringBase::find_last_not_of(wxChar ch, size_t nStart) const +{ + if ( nStart == npos ) + { + nStart = length() - 1; + } + else + { + wxASSERT( nStart <= length() ); + } + + for ( const wxChar *p = c_str() + nStart; p >= c_str(); --p ) + { + if ( *p != ch ) + return p - c_str(); + } + + return npos; +} + +wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen, + const wxChar *sz) +{ + wxASSERT_MSG( nStart <= length(), + _T("index out of bounds in wxStringBase::replace") ); + size_t strLen = length() - nStart; + nLen = strLen < nLen ? strLen : nLen; + + wxStringBase strTmp; + strTmp.reserve(length()); // micro optimisation to avoid multiple mem allocs + + //This is kind of inefficient, but its pretty good considering... + //we don't want to use character access operators here because on STL + //it will freeze the reference count of strTmp, which means a deep copy + //at the end when swap is called + // + //Also, we can't use append with the full character pointer and must + //do it manually because this string can contain null characters + for(size_t i1 = 0; i1 < nStart; ++i1) + strTmp.append(1, this->c_str()[i1]); + + //its safe to do the full version here because + //sz must be a normal c string + strTmp.append(sz); + + for(size_t i2 = nStart + nLen; i2 < length(); ++i2) + strTmp.append(1, this->c_str()[i2]); + + swap(strTmp); + return *this; +} + +wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen, + size_t nCount, wxChar ch) +{ + return replace(nStart, nLen, wxStringBase(nCount, ch).c_str()); +} + +wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen, + const wxStringBase& str, + size_t nStart2, size_t nLen2) +{ + return replace(nStart, nLen, str.substr(nStart2, nLen2)); +} + +wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen, + const wxChar* sz, size_t nCount) +{ + return replace(nStart, nLen, wxStringBase(sz, nCount).c_str()); +} + +wxStringBase wxStringBase::substr(size_t nStart, size_t nLen) const +{ + if ( nLen == npos ) + nLen = length() - nStart; + return wxStringBase(*this, nStart, nLen); +} + +// assigns one string to another +wxStringBase& wxStringBase::operator=(const wxStringBase& stringSrc) +{ + wxASSERT( stringSrc.GetStringData()->IsValid() ); + + // don't copy string over itself + if ( m_pchData != stringSrc.m_pchData ) { + if ( stringSrc.GetStringData()->IsEmpty() ) { + Reinit(); + } + else { + // adjust references + GetStringData()->Unlock(); + m_pchData = stringSrc.m_pchData; + GetStringData()->Lock(); + } + } + + return *this; +} + +// assigns a single character +wxStringBase& wxStringBase::operator=(wxChar ch) +{ + if ( !AssignCopy(1, &ch) ) { + wxFAIL_MSG( _T("out of memory in wxStringBase::operator=(wxChar)") ); + } + return *this; +} + +// assigns C string +wxStringBase& wxStringBase::operator=(const wxChar *psz) +{ + if ( !AssignCopy(wxStrlen(psz), psz) ) { + wxFAIL_MSG( _T("out of memory in wxStringBase::operator=(const wxChar *)") ); + } + return *this; +} + +// helper function: does real copy +bool wxStringBase::AssignCopy(size_t nSrcLen, const wxChar *pszSrcData) +{ + if ( nSrcLen == 0 ) { + Reinit(); + } + else { + if ( !AllocBeforeWrite(nSrcLen) ) { + // allocation failure handled by caller + return false; + } + memcpy(m_pchData, pszSrcData, nSrcLen*sizeof(wxChar)); + GetStringData()->nDataLength = nSrcLen; + m_pchData[nSrcLen] = wxT('\0'); + } + return true; +} + +// --------------------------------------------------------------------------- +// string concatenation +// --------------------------------------------------------------------------- + +// add something to this string +bool wxStringBase::ConcatSelf(size_t nSrcLen, const wxChar *pszSrcData, + size_t nMaxLen) +{ + STATISTICS_ADD(SummandLength, nSrcLen); + + nSrcLen = nSrcLen < nMaxLen ? nSrcLen : nMaxLen; + + // concatenating an empty string is a NOP + if ( nSrcLen > 0 ) { + wxStringData *pData = GetStringData(); + size_t nLen = pData->nDataLength; + size_t nNewLen = nLen + nSrcLen; + + // alloc new buffer if current is too small + if ( pData->IsShared() ) { + STATISTICS_ADD(ConcatHit, 0); + + // we have to allocate another buffer + wxStringData* pOldData = GetStringData(); + if ( !AllocBuffer(nNewLen) ) { + // allocation failure handled by caller + return false; } memcpy(m_pchData, pOldData->data(), nLen*sizeof(wxChar)); pOldData->Unlock(); @@ -653,10 +855,11 @@ bool wxString::ConcatSelf(size_t nSrcLen, const wxChar *pszSrcData) else if ( nNewLen > pData->nAllocLength ) { STATISTICS_ADD(ConcatHit, 0); + reserve(nNewLen); // we have to grow the buffer - if ( !Alloc(nNewLen) ) { + if ( capacity() < nNewLen ) { // allocation failure handled by caller - return FALSE; + return false; } } else { @@ -675,8 +878,240 @@ bool wxString::ConcatSelf(size_t nSrcLen, const wxChar *pszSrcData) GetStringData()->nDataLength = nNewLen; // and fix the length } //else: the string to append was empty - return TRUE; + return true; +} + +// --------------------------------------------------------------------------- +// simple sub-string extraction +// --------------------------------------------------------------------------- + +// helper function: clone the data attached to this string +bool wxStringBase::AllocCopy(wxString& dest, int nCopyLen, int nCopyIndex) const +{ + if ( nCopyLen == 0 ) { + dest.Init(); + } + else { + if ( !dest.AllocBuffer(nCopyLen) ) { + // allocation failure handled by caller + return false; + } + memcpy(dest.m_pchData, m_pchData + nCopyIndex, nCopyLen*sizeof(wxChar)); + } + return true; +} + +#endif // !wxUSE_STL + +#if !wxUSE_STL || !defined(HAVE_STD_STRING_COMPARE) + +#if !wxUSE_STL + #define STRINGCLASS wxStringBase +#else + #define STRINGCLASS wxString +#endif + +static inline int wxDoCmp(const wxChar* s1, size_t l1, + const wxChar* s2, size_t l2) +{ + if( l1 == l2 ) + return wxTmemcmp(s1, s2, l1); + else if( l1 < l2 ) + { + int ret = wxTmemcmp(s1, s2, l1); + return ret == 0 ? -1 : ret; + } + else + { + int ret = wxTmemcmp(s1, s2, l2); + return ret == 0 ? +1 : ret; + } +} + +int STRINGCLASS::compare(const wxStringBase& str) const +{ + return ::wxDoCmp(data(), length(), str.data(), str.length()); +} + +int STRINGCLASS::compare(size_t nStart, size_t nLen, + const wxStringBase& str) const +{ + wxASSERT(nStart <= length()); + size_type strLen = length() - nStart; + nLen = strLen < nLen ? strLen : nLen; + return ::wxDoCmp(data() + nStart, nLen, str.data(), str.length()); +} + +int STRINGCLASS::compare(size_t nStart, size_t nLen, + const wxStringBase& str, + size_t nStart2, size_t nLen2) const +{ + wxASSERT(nStart <= length()); + wxASSERT(nStart2 <= str.length()); + size_type strLen = length() - nStart, + strLen2 = str.length() - nStart2; + nLen = strLen < nLen ? strLen : nLen; + nLen2 = strLen2 < nLen2 ? strLen2 : nLen2; + return ::wxDoCmp(data() + nStart, nLen, str.data() + nStart2, nLen2); +} + +int STRINGCLASS::compare(const wxChar* sz) const +{ + size_t nLen = wxStrlen(sz); + return ::wxDoCmp(data(), length(), sz, nLen); +} + +int STRINGCLASS::compare(size_t nStart, size_t nLen, + const wxChar* sz, size_t nCount) const +{ + wxASSERT(nStart <= length()); + size_type strLen = length() - nStart; + nLen = strLen < nLen ? strLen : nLen; + if( nCount == npos ) + nCount = wxStrlen(sz); + + return ::wxDoCmp(data() + nStart, nLen, sz, nCount); +} + +#undef STRINGCLASS + +#endif // !wxUSE_STL || !defined(HAVE_STD_STRING_COMPARE) + +// =========================================================================== +// wxString class core +// =========================================================================== + +// --------------------------------------------------------------------------- +// construction and conversion +// --------------------------------------------------------------------------- + +#if wxUSE_UNICODE + +// from multibyte string +wxString::wxString(const char *psz, const wxMBConv& conv, size_t nLength) +{ + // anything to do? + if ( psz && nLength != 0 ) + { + if ( nLength == npos ) + { + nLength = wxNO_LEN; + } + + size_t nLenWide; + wxWCharBuffer wbuf = conv.cMB2WC(psz, nLength, &nLenWide); + + if ( nLenWide ) + assign(wbuf, nLenWide); + } +} + +//Convert wxString in Unicode mode to a multi-byte string +const wxCharBuffer wxString::mb_str(const wxMBConv& conv) const +{ + return conv.cWC2MB(c_str(), length() + 1 /* size, not length */, NULL); +} + +#else // ANSI + +#if wxUSE_WCHAR_T + +// from wide string +wxString::wxString(const wchar_t *pwz, const wxMBConv& conv, size_t nLength) +{ + // anything to do? + if ( pwz && nLength != 0 ) + { + if ( nLength == npos ) + { + nLength = wxNO_LEN; + } + + size_t nLenMB; + wxCharBuffer buf = conv.cWC2MB(pwz, nLength, &nLenMB); + + if ( nLenMB ) + assign(buf, nLenMB); + } +} + +//Converts this string to a wide character string if unicode +//mode is not enabled and wxUSE_WCHAR_T is enabled +const wxWCharBuffer wxString::wc_str(const wxMBConv& conv) const +{ + return conv.cMB2WC(c_str(), length() + 1 /* size, not length */, NULL); +} + +#endif // wxUSE_WCHAR_T + +#endif // Unicode/ANSI + +// shrink to minimal size (releasing extra memory) +bool wxString::Shrink() +{ + wxString tmp(begin(), end()); + swap(tmp); + return tmp.length() == length(); +} + +#if !wxUSE_STL +// get the pointer to writable buffer of (at least) nLen bytes +wxChar *wxString::GetWriteBuf(size_t nLen) +{ + if ( !AllocBeforeWrite(nLen) ) { + // allocation failure handled by caller + return NULL; + } + + wxASSERT( GetStringData()->nRefs == 1 ); + GetStringData()->Validate(false); + + return m_pchData; +} + +// put string back in a reasonable state after GetWriteBuf +void wxString::UngetWriteBuf() +{ + GetStringData()->nDataLength = wxStrlen(m_pchData); + GetStringData()->Validate(true); +} + +void wxString::UngetWriteBuf(size_t nLen) +{ + GetStringData()->nDataLength = nLen; + GetStringData()->Validate(true); +} +#endif + +// --------------------------------------------------------------------------- +// data access +// --------------------------------------------------------------------------- + +// all functions are inline in string.h + +// --------------------------------------------------------------------------- +// assignment operators +// --------------------------------------------------------------------------- + +#if !wxUSE_UNICODE + +// same as 'signed char' variant +wxString& wxString::operator=(const unsigned char* psz) +{ + *this = (const char *)psz; + return *this; +} + +#if wxUSE_WCHAR_T +wxString& wxString::operator=(const wchar_t *pwz) +{ + wxString str(pwz); + swap(str); + return *this; } +#endif + +#endif /* * concatenation functions come in 5 flavours: @@ -687,69 +1122,142 @@ bool wxString::ConcatSelf(size_t nSrcLen, const wxChar *pszSrcData) wxString operator+(const wxString& str1, const wxString& str2) { - wxASSERT( str1.GetStringData()->IsValid() ); - wxASSERT( str2.GetStringData()->IsValid() ); +#if !wxUSE_STL + wxASSERT( str1.GetStringData()->IsValid() ); + wxASSERT( str2.GetStringData()->IsValid() ); +#endif - wxString s = str1; - s += str2; + wxString s = str1; + s += str2; - return s; + return s; } wxString operator+(const wxString& str, wxChar ch) { - wxASSERT( str.GetStringData()->IsValid() ); +#if !wxUSE_STL + wxASSERT( str.GetStringData()->IsValid() ); +#endif - wxString s = str; - s += ch; + wxString s = str; + s += ch; - return s; + return s; } wxString operator+(wxChar ch, const wxString& str) { - wxASSERT( str.GetStringData()->IsValid() ); +#if !wxUSE_STL + wxASSERT( str.GetStringData()->IsValid() ); +#endif - wxString s = ch; - s += str; + wxString s = ch; + s += str; - return s; + return s; } wxString operator+(const wxString& str, const wxChar *psz) { - wxASSERT( str.GetStringData()->IsValid() ); +#if !wxUSE_STL + wxASSERT( str.GetStringData()->IsValid() ); +#endif - wxString s; - if ( !s.Alloc(wxStrlen(psz) + str.Len()) ) { - wxFAIL_MSG( _T("out of memory in wxString::operator+") ); - } - s = str; - s += psz; + wxString s; + if ( !s.Alloc(wxStrlen(psz) + str.length()) ) { + wxFAIL_MSG( _T("out of memory in wxString::operator+") ); + } + s += str; + s += psz; - return s; + return s; } wxString operator+(const wxChar *psz, const wxString& str) { - wxASSERT( str.GetStringData()->IsValid() ); +#if !wxUSE_STL + wxASSERT( str.GetStringData()->IsValid() ); +#endif - wxString s; - if ( !s.Alloc(wxStrlen(psz) + str.Len()) ) { - wxFAIL_MSG( _T("out of memory in wxString::operator+") ); - } - s = psz; - s += str; + wxString s; + if ( !s.Alloc(wxStrlen(psz) + str.length()) ) { + wxFAIL_MSG( _T("out of memory in wxString::operator+") ); + } + s = psz; + s += str; - return s; + return s; } // =========================================================================== // other common string functions // =========================================================================== +int wxString::Cmp(const wxString& s) const +{ + return compare(s); +} + +int wxString::Cmp(const wxChar* psz) const +{ + return compare(psz); +} + +static inline int wxDoCmpNoCase(const wxChar* s1, size_t l1, + const wxChar* s2, size_t l2) +{ + size_t i; + + if( l1 == l2 ) + { + for(i = 0; i < l1; ++i) + { + if(wxTolower(s1[i]) != wxTolower(s2[i])) + break; + } + return i == l1 ? 0 : wxTolower(s1[i]) < wxTolower(s2[i]) ? -1 : 1; + } + else if( l1 < l2 ) + { + for(i = 0; i < l1; ++i) + { + if(wxTolower(s1[i]) != wxTolower(s2[i])) + break; + } + return i == l1 ? -1 : wxTolower(s1[i]) < wxTolower(s2[i]) ? -1 : 1; + } + else + { + for(i = 0; i < l2; ++i) + { + if(wxTolower(s1[i]) != wxTolower(s2[i])) + break; + } + return i == l2 ? 1 : wxTolower(s1[i]) < wxTolower(s2[i]) ? -1 : 1; + } +} + +int wxString::CmpNoCase(const wxString& s) const +{ + return wxDoCmpNoCase(data(), length(), s.data(), s.length()); +} + +int wxString::CmpNoCase(const wxChar* psz) const +{ + int nLen = wxStrlen(psz); + + return wxDoCmpNoCase(data(), length(), psz, nLen); +} + + #if wxUSE_UNICODE +#ifdef __MWERKS__ +#ifndef __SCHAR_MAX__ +#define __SCHAR_MAX__ 127 +#endif +#endif + wxString wxString::FromAscii(const char *ascii) { if (!ascii) @@ -789,12 +1297,13 @@ const wxCharBuffer wxString::ToAscii() const // this will allocate enough space for the terminating NUL too wxCharBuffer buffer(length()); - signed char *dest = (signed char *)buffer.data(); + + char *dest = buffer.data(); const wchar_t *pwc = c_str(); for ( ;; ) { - *dest++ = *pwc > SCHAR_MAX ? '_' : *pwc; + *dest++ = (char)(*pwc > SCHAR_MAX ? wxT('_') : *pwc); // the output string can't have embedded NULs anyhow, so we can safely // stop at first of them even if we do have any @@ -807,60 +1316,40 @@ const wxCharBuffer wxString::ToAscii() const #endif // Unicode -// --------------------------------------------------------------------------- -// simple sub-string extraction -// --------------------------------------------------------------------------- - -// helper function: clone the data attached to this string -bool wxString::AllocCopy(wxString& dest, int nCopyLen, int nCopyIndex) const -{ - if ( nCopyLen == 0 ) { - dest.Init(); - } - else { - if ( !dest.AllocBuffer(nCopyLen) ) { - // allocation failure handled by caller - return FALSE; - } - memcpy(dest.m_pchData, m_pchData + nCopyIndex, nCopyLen*sizeof(wxChar)); - } - return TRUE; -} - // extract string of length nCount starting at nFirst wxString wxString::Mid(size_t nFirst, size_t nCount) const { - wxStringData *pData = GetStringData(); - size_t nLen = pData->nDataLength; + size_t nLen = length(); - // default value of nCount is wxSTRING_MAXLEN and means "till the end" - if ( nCount == wxSTRING_MAXLEN ) - { - nCount = nLen - nFirst; - } + // default value of nCount is npos and means "till the end" + if ( nCount == npos ) + { + nCount = nLen - nFirst; + } - // out-of-bounds requests return sensible things - if ( nFirst + nCount > nLen ) - { - nCount = nLen - nFirst; - } + // out-of-bounds requests return sensible things + if ( nFirst + nCount > nLen ) + { + nCount = nLen - nFirst; + } - if ( nFirst > nLen ) - { - // AllocCopy() will return empty string - nCount = 0; - } + if ( nFirst > nLen ) + { + // AllocCopy() will return empty string + return wxEmptyString; + } - wxString dest; - if ( !AllocCopy(dest, nCount, nFirst) ) { - wxFAIL_MSG( _T("out of memory in wxString::Mid") ); - } + wxString dest(*this, nFirst, nCount); + if ( dest.length() != nCount ) + { + wxFAIL_MSG( _T("out of memory in wxString::Mid") ); + } - return dest; + return dest; } -// check that the tring starts with prefix and return the rest of the string -// in the provided pointer if it is not NULL, otherwise return FALSE +// check that the string starts with prefix and return the rest of the string +// in the provided pointer if it is not NULL, otherwise return false bool wxString::StartsWith(const wxChar *prefix, wxString *rest) const { wxASSERT_MSG( prefix, _T("invalid parameter in wxString::StartsWith") ); @@ -875,7 +1364,7 @@ bool wxString::StartsWith(const wxChar *prefix, wxString *rest) const if ( *prefix++ != *p++ ) { // no match - return FALSE; + return false; } } @@ -885,17 +1374,38 @@ bool wxString::StartsWith(const wxChar *prefix, wxString *rest) const *rest = p; } - return TRUE; + return true; +} + + +// check that the string ends with suffix and return the rest of it in the +// provided pointer if it is not NULL, otherwise return false +bool wxString::EndsWith(const wxChar *suffix, wxString *rest) const +{ + wxASSERT_MSG( suffix, _T("invalid parameter in wxString::EndssWith") ); + + int start = length() - wxStrlen(suffix); + if ( start < 0 || wxStrcmp(c_str() + start, suffix) != 0 ) + return false; + + if ( rest ) + { + // put the rest of the string into provided pointer + rest->assign(*this, 0, start); + } + + return true; } + // extract nCount last (rightmost) characters wxString wxString::Right(size_t nCount) const { - if ( nCount > (size_t)GetStringData()->nDataLength ) - nCount = GetStringData()->nDataLength; + if ( nCount > length() ) + nCount = length(); - wxString dest; - if ( !AllocCopy(dest, nCount, GetStringData()->nDataLength - nCount) ) { + wxString dest(*this, length() - nCount, nCount); + if ( dest.length() != nCount ) { wxFAIL_MSG( _T("out of memory in wxString::Right") ); } return dest; @@ -906,7 +1416,7 @@ wxString wxString::Right(size_t nCount) const wxString wxString::AfterLast(wxChar ch) const { wxString str; - int iPos = Find(ch, TRUE); + int iPos = Find(ch, true); if ( iPos == wxNOT_FOUND ) str = *this; else @@ -918,11 +1428,11 @@ wxString wxString::AfterLast(wxChar ch) const // extract nCount first (leftmost) characters wxString wxString::Left(size_t nCount) const { - if ( nCount > (size_t)GetStringData()->nDataLength ) - nCount = GetStringData()->nDataLength; + if ( nCount > length() ) + nCount = length(); - wxString dest; - if ( !AllocCopy(dest, nCount, 0) ) { + wxString dest(*this, 0, nCount); + if ( dest.length() != nCount ) { wxFAIL_MSG( _T("out of memory in wxString::Left") ); } return dest; @@ -932,11 +1442,9 @@ wxString wxString::Left(size_t nCount) const // (returns the whole string if ch not found) wxString wxString::BeforeFirst(wxChar ch) const { - wxString str; - for ( const wxChar *pc = m_pchData; *pc != wxT('\0') && *pc != ch; pc++ ) - str += *pc; - - return str; + int iPos = Find(ch); + if ( iPos == wxNOT_FOUND ) iPos = length(); + return wxString(*this, 0, iPos); } /// get all characters before the last occurence of ch @@ -944,7 +1452,7 @@ wxString wxString::BeforeFirst(wxChar ch) const wxString wxString::BeforeLast(wxChar ch) const { wxString str; - int iPos = Find(ch, TRUE); + int iPos = Find(ch, true); if ( iPos != wxNOT_FOUND && iPos != 0 ) str = wxString(c_str(), iPos); @@ -964,92 +1472,85 @@ wxString wxString::AfterFirst(wxChar ch) const } // replace first (or all) occurences of some substring with another one -size_t -wxString::Replace(const wxChar *szOld, const wxChar *szNew, bool bReplaceAll) +size_t wxString::Replace(const wxChar *szOld, + const wxChar *szNew, bool bReplaceAll) { // if we tried to replace an empty string we'd enter an infinite loop below wxCHECK_MSG( szOld && *szOld && szNew, 0, _T("wxString::Replace(): invalid parameter") ); - size_t uiCount = 0; // count of replacements made + size_t uiCount = 0; // count of replacements made - size_t uiOldLen = wxStrlen(szOld); + size_t uiOldLen = wxStrlen(szOld); + size_t uiNewLen = wxStrlen(szNew); - wxString strTemp; - const wxChar *pCurrent = m_pchData; - const wxChar *pSubstr; - while ( *pCurrent != wxT('\0') ) { - pSubstr = wxStrstr(pCurrent, szOld); - if ( pSubstr == NULL ) { - // strTemp is unused if no replacements were made, so avoid the copy - if ( uiCount == 0 ) - return 0; + size_t dwPos = 0; - strTemp += pCurrent; // copy the rest - break; // exit the loop - } - else { - // take chars before match - if ( !strTemp.ConcatSelf(pSubstr - pCurrent, pCurrent) ) { - wxFAIL_MSG( _T("out of memory in wxString::Replace") ); - return 0; - } - strTemp += szNew; - pCurrent = pSubstr + uiOldLen; // restart after match + while ( this->c_str()[dwPos] != wxT('\0') ) + { + //DO NOT USE STRSTR HERE + //this string can contain embedded null characters, + //so strstr will function incorrectly + dwPos = find(szOld, dwPos); + if ( dwPos == npos ) + break; // exit the loop + else + { + //replace this occurance of the old string with the new one + replace(dwPos, uiOldLen, szNew, uiNewLen); - uiCount++; + //move up pos past the string that was replaced + dwPos += uiNewLen; - // stop now? - if ( !bReplaceAll ) { - strTemp += pCurrent; // copy the rest - break; // exit the loop - } - } - } + //increase replace count + ++uiCount; - // only done if there were replacements, otherwise would have returned above - *this = strTemp; + // stop now? + if ( !bReplaceAll ) + break; // exit the loop + } + } - return uiCount; + return uiCount; } bool wxString::IsAscii() const { const wxChar *s = (const wxChar*) *this; while(*s){ - if(!isascii(*s)) return(FALSE); + if(!isascii(*s)) return(false); s++; } - return(TRUE); + return(true); } bool wxString::IsWord() const { const wxChar *s = (const wxChar*) *this; while(*s){ - if(!wxIsalpha(*s)) return(FALSE); + if(!wxIsalpha(*s)) return(false); s++; } - return(TRUE); + return(true); } bool wxString::IsNumber() const { const wxChar *s = (const wxChar*) *this; if (wxStrlen(s)) - if ((s[0] == '-') || (s[0] == '+')) s++; + if ((s[0] == wxT('-')) || (s[0] == wxT('+'))) s++; while(*s){ - if(!wxIsdigit(*s)) return(FALSE); + if(!wxIsdigit(*s)) return(false); s++; } - return(TRUE); + return(true); } wxString wxString::Strip(stripType w) const { wxString s = *this; - if ( w & leading ) s.Trim(FALSE); - if ( w & trailing ) s.Trim(TRUE); + if ( w & leading ) s.Trim(false); + if ( w & trailing ) s.Trim(true); return s; } @@ -1059,26 +1560,16 @@ wxString wxString::Strip(stripType w) const wxString& wxString::MakeUpper() { - if ( !CopyBeforeWrite() ) { - wxFAIL_MSG( _T("out of memory in wxString::MakeUpper") ); - return *this; - } - - for ( wxChar *p = m_pchData; *p; p++ ) - *p = (wxChar)wxToupper(*p); + for ( iterator it = begin(), en = end(); it != en; ++it ) + *it = (wxChar)wxToupper(*it); return *this; } wxString& wxString::MakeLower() { - if ( !CopyBeforeWrite() ) { - wxFAIL_MSG( _T("out of memory in wxString::MakeLower") ); - return *this; - } - - for ( wxChar *p = m_pchData; *p; p++ ) - *p = (wxChar)wxTolower(*p); + for ( iterator it = begin(), en = end(); it != en; ++it ) + *it = (wxChar)wxTolower(*it); return *this; } @@ -1087,7 +1578,7 @@ wxString& wxString::MakeLower() // trimming and padding // --------------------------------------------------------------------------- -// some compilers (VC++ 6.0 not to name them) return TRUE for a call to +// some compilers (VC++ 6.0 not to name them) return true for a call to // isspace('ê') in the C locale which seems to be broken to me, but we have to // live with this by checking that the character is a 7 bit one - even if this // may fail to detect some spaces (I don't know if Unicode doesn't have @@ -1098,79 +1589,65 @@ inline int wxSafeIsspace(wxChar ch) { return (ch < 127) && wxIsspace(ch); } // trims spaces (in the sense of isspace) from left or right side wxString& wxString::Trim(bool bFromRight) { - // first check if we're going to modify the string at all - if ( !IsEmpty() && - ( - (bFromRight && wxSafeIsspace(GetChar(Len() - 1))) || - (!bFromRight && wxSafeIsspace(GetChar(0u))) + // first check if we're going to modify the string at all + if ( !empty() && + ( + (bFromRight && wxSafeIsspace(GetChar(length() - 1))) || + (!bFromRight && wxSafeIsspace(GetChar(0u))) + ) ) - ) - { - // ok, there is at least one space to trim - if ( !CopyBeforeWrite() ) { - wxFAIL_MSG( _T("out of memory in wxString::Trim") ); - return *this; - } - - if ( bFromRight ) - { - // find last non-space character - wxChar *psz = m_pchData + GetStringData()->nDataLength - 1; - while ( wxSafeIsspace(*psz) && (psz >= m_pchData) ) - psz--; - - // truncate at trailing space start - *++psz = wxT('\0'); - GetStringData()->nDataLength = psz - m_pchData; - } - else { - // find first non-space character - const wxChar *psz = m_pchData; - while ( wxSafeIsspace(*psz) ) - psz++; + if ( bFromRight ) + { + // find last non-space character + reverse_iterator psz = rbegin(); + while ( (psz != rend()) && wxSafeIsspace(*psz) ) + psz++; + + // truncate at trailing space start + erase(psz.base(), end()); + } + else + { + // find first non-space character + iterator psz = begin(); + while ( (psz != end()) && wxSafeIsspace(*psz) ) + psz++; - // fix up data and length - int nDataLength = GetStringData()->nDataLength - (psz - (const wxChar*) m_pchData); - memmove(m_pchData, psz, (nDataLength + 1)*sizeof(wxChar)); - GetStringData()->nDataLength = nDataLength; + // fix up data and length + erase(begin(), psz); + } } - } - return *this; + return *this; } // adds nCount characters chPad to the string from either side wxString& wxString::Pad(size_t nCount, wxChar chPad, bool bFromRight) { - wxString s(chPad, nCount); + wxString s(chPad, nCount); - if ( bFromRight ) - *this += s; - else - { - s += *this; - *this = s; - } + if ( bFromRight ) + *this += s; + else + { + s += *this; + swap(s); + } - return *this; + return *this; } // truncate the string wxString& wxString::Truncate(size_t uiLen) { - if ( uiLen < Len() ) { - if ( !CopyBeforeWrite() ) { - wxFAIL_MSG( _T("out of memory in wxString::Truncate") ); - return *this; + if ( uiLen < length() ) + { + erase(begin() + uiLen, end()); } + //else: nothing to do, string is already short enough - *(m_pchData + uiLen) = wxT('\0'); - GetStringData()->nDataLength = uiLen; - } - //else: nothing to do, string is already short enough - - return *this; + return *this; } // --------------------------------------------------------------------------- @@ -1180,17 +1657,17 @@ wxString& wxString::Truncate(size_t uiLen) // find a character int wxString::Find(wxChar ch, bool bFromEnd) const { - const wxChar *psz = bFromEnd ? wxStrrchr(m_pchData, ch) : wxStrchr(m_pchData, ch); + size_type idx = bFromEnd ? find_last_of(ch) : find_first_of(ch); - return (psz == NULL) ? wxNOT_FOUND : psz - (const wxChar*) m_pchData; + return (idx == npos) ? wxNOT_FOUND : (int)idx; } // find a sub-string (like strstr) int wxString::Find(const wxChar *pszSub) const { - const wxChar *psz = wxStrstr(m_pchData, pszSub); + size_type idx = find(pszSub); - return (psz == NULL) ? wxNOT_FOUND : psz - (const wxChar*) m_pchData; + return (idx == npos) ? wxNOT_FOUND : (int)idx; } // ---------------------------------------------------------------------------- @@ -1199,41 +1676,41 @@ int wxString::Find(const wxChar *pszSub) const bool wxString::ToLong(long *val, int base) const { - wxCHECK_MSG( val, FALSE, _T("NULL pointer in wxString::ToLong") ); + wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToLong") ); wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") ); const wxChar *start = c_str(); wxChar *end; *val = wxStrtol(start, &end, base); - // return TRUE only if scan was stopped by the terminating NUL and if the + // return true only if scan was stopped by the terminating NUL and if the // string was not empty to start with return !*end && (end != start); } bool wxString::ToULong(unsigned long *val, int base) const { - wxCHECK_MSG( val, FALSE, _T("NULL pointer in wxString::ToULong") ); + wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToULong") ); wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") ); const wxChar *start = c_str(); wxChar *end; *val = wxStrtoul(start, &end, base); - // return TRUE only if scan was stopped by the terminating NUL and if the + // return true only if scan was stopped by the terminating NUL and if the // string was not empty to start with return !*end && (end != start); } bool wxString::ToDouble(double *val) const { - wxCHECK_MSG( val, FALSE, _T("NULL pointer in wxString::ToDouble") ); + wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToDouble") ); const wxChar *start = c_str(); wxChar *end; *val = wxStrtod(start, &end); - // return TRUE only if scan was stopped by the terminating NUL and if the + // return true only if scan was stopped by the terminating NUL and if the // string was not empty to start with return !*end && (end != start); } @@ -1266,57 +1743,73 @@ wxString wxString::FormatV(const wxChar *pszFormat, va_list argptr) int wxString::Printf(const wxChar *pszFormat, ...) { - va_list argptr; - va_start(argptr, pszFormat); + va_list argptr; + va_start(argptr, pszFormat); - int iLen = PrintfV(pszFormat, argptr); + int iLen = PrintfV(pszFormat, argptr); - va_end(argptr); + va_end(argptr); - return iLen; + return iLen; } int wxString::PrintfV(const wxChar* pszFormat, va_list argptr) { int size = 1024; + for ( ;; ) { - wxChar *buf = GetWriteBuf(size + 1); + wxStringBuffer tmp(*this, size + 1); + wxChar *buf = tmp; + if ( !buf ) { // out of memory return -1; } - int len = wxVsnprintf(buf, size, pszFormat, argptr); + // wxVsnprintf() may modify the original arg pointer, so pass it + // only a copy + va_list argptrcopy; + wxVaCopy(argptrcopy, argptr); + int len = wxVsnprintf(buf, size, pszFormat, argptrcopy); + va_end(argptrcopy); - // some implementations of vsnprintf() don't NUL terminate the string - // if there is not enough space for it so always do it manually + // some implementations of vsnprintf() don't NUL terminate + // the string if there is not enough space for it so + // always do it manually buf[size] = _T('\0'); - UngetWriteBuf(); - - if ( len >= 0 ) + // vsnprintf() may return either -1 (traditional Unix behaviour) or the + // total number of characters which would have been written if the + // buffer were large enough (newer standards such as Unix98) + if ( len < 0 ) + { + // still not enough, as we don't know how much we need, double the + // current size of the buffer + size *= 2; + } + else if ( len > size ) + { + size = len; + } + else // ok, there was enough space { - // ok, there was enough space break; } - - // still not enough, double it again - size *= 2; } // we could have overshot Shrink(); - return Len(); + return length(); } // ---------------------------------------------------------------------------- // misc other operations // ---------------------------------------------------------------------------- -// returns TRUE if the string matches the pattern which may contain '*' and +// returns true if the string matches the pattern which may contain '*' and // '?' metacharacters (as usual, '?' matches any character and '*' any number // of them) bool wxString::Matches(const wxChar *pszMask) const @@ -1382,7 +1875,7 @@ match: switch ( *pszMask ) { case wxT('?'): if ( *pszTxt == wxT('\0') ) - return FALSE; + return false; // pszTxt and pszMask will be incremented in the loop statement @@ -1401,7 +1894,7 @@ match: // if there is nothing more, match if ( *pszMask == wxT('\0') ) - return TRUE; + return true; // are there any other metacharacters in the mask? size_t uiLenMask; @@ -1419,7 +1912,7 @@ match: wxString strToMatch(pszMask, uiLenMask); const wxChar* pMatch = wxStrstr(pszTxt, strToMatch); if ( pMatch == NULL ) - return FALSE; + return false; // -1 to compensate "++" in the loop pszTxt = pMatch + uiLenMask - 1; @@ -1429,14 +1922,14 @@ match: default: if ( *pszMask != *pszTxt ) - return FALSE; + return false; break; } } // match only if nothing left if ( *pszTxt == wxT('\0') ) - return TRUE; + return true; // if we failed to match, backtrack if we can if ( pszLastStarInText ) { @@ -1450,7 +1943,7 @@ match: goto match; } - return FALSE; + return false; #endif // wxUSE_REGEX/!wxUSE_REGEX } @@ -1458,7 +1951,7 @@ match: int wxString::Freq(wxChar ch) const { int count = 0; - int len = Len(); + int len = length(); for (int i = 0; i < len; i++) { if (GetChar(i) == ch) @@ -1483,284 +1976,30 @@ int wxString::sprintf(const wxChar *pszFormat, ...) return iLen; } -// --------------------------------------------------------------------------- -// standard C++ library string functions -// --------------------------------------------------------------------------- - -#ifdef wxSTD_STRING_COMPATIBILITY - -void wxString::resize(size_t nSize, wxChar ch) -{ - size_t len = length(); - - if ( nSize < len ) - { - Truncate(nSize); - } - else if ( nSize > len ) - { - *this += wxString(ch, nSize - len); - } - //else: we have exactly the specified length, nothing to do -} - -void wxString::swap(wxString& str) -{ - // this is slightly less efficient than fiddling with m_pchData directly, - // but it is still quite efficient as we don't copy the string here because - // ref count always stays positive - wxString tmp = str; - str = *this; - *this = tmp; -} - -wxString& wxString::insert(size_t nPos, const wxString& str) -{ - wxASSERT( str.GetStringData()->IsValid() ); - wxASSERT( nPos <= Len() ); - - if ( !str.IsEmpty() ) { - wxString strTmp; - wxChar *pc = strTmp.GetWriteBuf(Len() + str.Len()); - wxStrncpy(pc, c_str(), nPos); - wxStrcpy(pc + nPos, str); - wxStrcpy(pc + nPos + str.Len(), c_str() + nPos); - strTmp.UngetWriteBuf(); - *this = strTmp; - } - - return *this; -} - -size_t wxString::find(const wxString& str, size_t nStart) const -{ - wxASSERT( str.GetStringData()->IsValid() ); - wxASSERT( nStart <= Len() ); - - const wxChar *p = wxStrstr(c_str() + nStart, str); - - return p == NULL ? npos : p - c_str(); -} +// ============================================================================ +// ArrayString +// ============================================================================ -// VC++ 1.5 can't cope with the default argument in the header. -#if !defined(__VISUALC__) || defined(__WIN32__) -size_t wxString::find(const wxChar* sz, size_t nStart, size_t n) const -{ - return find(wxString(sz, n), nStart); -} -#endif // VC++ 1.5 +#include "wx/arrstr.h" -// Gives a duplicate symbol (presumably a case-insensitivity problem) -#if !defined(__BORLANDC__) -size_t wxString::find(wxChar ch, size_t nStart) const +wxArrayString::wxArrayString(size_t sz, const wxChar** a) { - wxASSERT( nStart <= Len() ); - - const wxChar *p = wxStrchr(c_str() + nStart, ch); - - return p == NULL ? npos : p - c_str(); -} +#if !wxUSE_STL + Init(false); #endif - -size_t wxString::rfind(const wxString& str, size_t nStart) const -{ - wxASSERT( str.GetStringData()->IsValid() ); - wxASSERT( nStart == npos || nStart <= Len() ); - - // TODO could be made much quicker than that - const wxChar *p = c_str() + (nStart == npos ? Len() : nStart); - while ( p >= c_str() + str.Len() ) { - if ( wxStrncmp(p - str.Len(), str, str.Len()) == 0 ) - return p - str.Len() - c_str(); - p--; - } - - return npos; -} - -// VC++ 1.5 can't cope with the default argument in the header. -#if !defined(__VISUALC__) || defined(__WIN32__) -size_t wxString::rfind(const wxChar* sz, size_t nStart, size_t n) const -{ - return rfind(wxString(sz, n == npos ? wxSTRING_MAXLEN : n), nStart); -} - -size_t wxString::rfind(wxChar ch, size_t nStart) const -{ - if ( nStart == npos ) - { - nStart = Len(); - } - else - { - wxASSERT( nStart <= Len() ); - } - - const wxChar *p = wxStrrchr(c_str(), ch); - - if ( p == NULL ) - return npos; - - size_t result = p - c_str(); - return ( result > nStart ) ? npos : result; -} -#endif // VC++ 1.5 - -size_t wxString::find_first_of(const wxChar* sz, size_t nStart) const -{ - const wxChar *start = c_str() + nStart; - const wxChar *firstOf = wxStrpbrk(start, sz); - if ( firstOf ) - return firstOf - c_str(); - else - return npos; -} - -size_t wxString::find_last_of(const wxChar* sz, size_t nStart) const -{ - if ( nStart == npos ) - { - nStart = Len(); - } - else - { - wxASSERT( nStart <= Len() ); - } - - for ( const wxChar *p = c_str() + length() - 1; p >= c_str(); p-- ) - { - if ( wxStrchr(sz, *p) ) - return p - c_str(); - } - - return npos; -} - -size_t wxString::find_first_not_of(const wxChar* sz, size_t nStart) const -{ - if ( nStart == npos ) - { - nStart = Len(); - } - else - { - wxASSERT( nStart <= Len() ); - } - - size_t nAccept = wxStrspn(c_str() + nStart, sz); - if ( nAccept >= length() - nStart ) - return npos; - else - return nAccept; -} - -size_t wxString::find_first_not_of(wxChar ch, size_t nStart) const -{ - wxASSERT( nStart <= Len() ); - - for ( const wxChar *p = c_str() + nStart; *p; p++ ) - { - if ( *p != ch ) - return p - c_str(); - } - - return npos; -} - -size_t wxString::find_last_not_of(const wxChar* sz, size_t nStart) const -{ - if ( nStart == npos ) - { - nStart = Len(); - } - else - { - wxASSERT( nStart <= Len() ); - } - - for ( const wxChar *p = c_str() + nStart - 1; p >= c_str(); p-- ) - { - if ( !wxStrchr(sz, *p) ) - return p - c_str(); - } - - return npos; -} - -size_t wxString::find_last_not_of(wxChar ch, size_t nStart) const -{ - if ( nStart == npos ) - { - nStart = Len(); - } - else - { - wxASSERT( nStart <= Len() ); - } - - for ( const wxChar *p = c_str() + nStart - 1; p >= c_str(); p-- ) - { - if ( *p != ch ) - return p - c_str(); - } - - return npos; -} - -wxString& wxString::erase(size_t nStart, size_t nLen) -{ - wxString strTmp(c_str(), nStart); - if ( nLen != npos ) { - wxASSERT( nStart + nLen <= Len() ); - - strTmp.append(c_str() + nStart + nLen); - } - - *this = strTmp; - return *this; -} - -wxString& wxString::replace(size_t nStart, size_t nLen, const wxChar *sz) -{ - wxASSERT_MSG( nStart + nLen <= Len(), - _T("index out of bounds in wxString::replace") ); - - wxString strTmp; - strTmp.Alloc(Len()); // micro optimisation to avoid multiple mem allocs - - if ( nStart != 0 ) - strTmp.append(c_str(), nStart); - strTmp << sz << c_str() + nStart + nLen; - - *this = strTmp; - return *this; -} - -wxString& wxString::replace(size_t nStart, size_t nLen, size_t nCount, wxChar ch) -{ - return replace(nStart, nLen, wxString(ch, nCount)); -} - -wxString& wxString::replace(size_t nStart, size_t nLen, - const wxString& str, size_t nStart2, size_t nLen2) -{ - return replace(nStart, nLen, str.substr(nStart2, nLen2)); + for (size_t i=0; i < sz; i++) + Add(a[i]); } -wxString& wxString::replace(size_t nStart, size_t nLen, - const wxChar* sz, size_t nCount) +wxArrayString::wxArrayString(size_t sz, const wxString* a) { - return replace(nStart, nLen, wxString(sz, nCount)); +#if !wxUSE_STL + Init(false); +#endif + for (size_t i=0; i < sz; i++) + Add(a[i]); } -#endif //std::string compatibility - -// ============================================================================ -// ArrayString -// ============================================================================ - -#include "wx/arrstr.h" - #if !wxUSE_STL // size increment = min(50% of current size, ARRAY_MAXSIZE_INCREMENT) @@ -1887,6 +2126,11 @@ wxArrayString::~wxArrayString() wxDELETEA(m_pItems); } +void wxArrayString::reserve(size_t nSize) +{ + Alloc(nSize); +} + // pre-allocates memory (frees the previous data!) void wxArrayString::Alloc(size_t nSize) { @@ -1933,6 +2177,11 @@ wxString* wxArrayString::GetStringArray() const return array; } +void wxArrayString::Remove(size_t nIndex, size_t nRemove) +{ + RemoveAt(nIndex, nRemove); +} + #endif // WXWIN_COMPATIBILITY_2_4 // searches the array for an item (forward or backwards) @@ -1996,7 +2245,7 @@ size_t wxArrayString::Add(const wxString& str, size_t nInsert) while ( lo < hi ) { i = (lo + hi)/2; - res = wxStrcmp(str, m_pItems[i]); + res = str.Cmp(m_pItems[i]); if ( res < 0 ) hi = i; else if ( res > 0 ) @@ -2054,6 +2303,30 @@ void wxArrayString::Insert(const wxString& str, size_t nIndex, size_t nInsert) m_nCount += nInsert; } +// range insert (STL 23.2.4.3) +void +wxArrayString::insert(iterator it, const_iterator first, const_iterator last) +{ + const int idx = it - begin(); + + // grow it once + Grow(last - first); + + // reset "it" since it can change inside Grow() + it = begin() + idx; + + while ( first != last ) + { + it = insert(it, *first); + + // insert returns an iterator to the last element inserted but we need + // insert the next after this one, that is before the next one + ++it; + + ++first; + } +} + // expand the array void wxArrayString::SetCount(size_t count) { @@ -2091,6 +2364,13 @@ void wxArrayString::Remove(const wxChar *sz) RemoveAt(iIndex); } +void wxArrayString::assign(const_iterator first, const_iterator last) +{ + reserve(last - first); + for(; first != last; ++first) + push_back(*first); +} + // ---------------------------------------------------------------------------- // sorting // ---------------------------------------------------------------------------- @@ -2100,19 +2380,7 @@ void wxArrayString::Remove(const wxChar *sz) #if wxUSE_THREADS // need a critical section to protect access to gs_compareFunction and // gs_sortAscending variables - static wxCriticalSection *gs_critsectStringSort = NULL; - - // call this before the value of the global sort vars is changed/after - // you're finished with them - #define START_SORT() wxASSERT( !gs_critsectStringSort ); \ - gs_critsectStringSort = new wxCriticalSection; \ - gs_critsectStringSort->Enter() - #define END_SORT() gs_critsectStringSort->Leave(); \ - delete gs_critsectStringSort; \ - gs_critsectStringSort = NULL -#else // !threads - #define START_SORT() - #define END_SORT() + static wxCriticalSection gs_critsectStringSort; #endif // wxUSE_THREADS // function to use for string comparaison @@ -2120,7 +2388,7 @@ static wxArrayString::CompareFunction gs_compareFunction = NULL; // if we don't use the compare function, this flag tells us if we sort the // array in ascending or descending order -static bool gs_sortAscending = TRUE; +static bool gs_sortAscending = true; // function which is called by quick sort extern "C" int wxC_CALLING_CONV // LINKAGEMODE @@ -2134,7 +2402,7 @@ wxStringCompareFunction(const void *first, const void *second) } else { // maybe we should use wxStrcoll - int result = wxStrcmp(strFirst->c_str(), strSecond->c_str()); + int result = strFirst->Cmp(*strSecond); return gs_sortAscending ? result : -result; } @@ -2143,7 +2411,7 @@ wxStringCompareFunction(const void *first, const void *second) // sort array elements using passed comparaison function void wxArrayString::Sort(CompareFunction compareFunction) { - START_SORT(); + wxCRIT_SECT_LOCKER(lockCmpFunc, gs_critsectStringSort); wxASSERT( !gs_compareFunction ); // must have been reset to NULL gs_compareFunction = compareFunction; @@ -2152,11 +2420,13 @@ void wxArrayString::Sort(CompareFunction compareFunction) // reset it to NULL so that Sort(bool) will work the next time gs_compareFunction = NULL; - - END_SORT(); } -typedef int (wxC_CALLING_CONV * wxStringCompareFn)(const void *first, const void *second); +extern "C" +{ + typedef int (wxC_CALLING_CONV * wxStringCompareFn)(const void *first, + const void *second); +} void wxArrayString::Sort(CompareFunction2 compareFunction) { @@ -2180,25 +2450,25 @@ void wxArrayString::DoSort() bool wxArrayString::operator==(const wxArrayString& a) const { if ( m_nCount != a.m_nCount ) - return FALSE; + return false; for ( size_t n = 0; n < m_nCount; n++ ) { if ( Item(n) != a[n] ) - return FALSE; + return false; } - return TRUE; + return true; } #endif // !wxUSE_STL -int wxStringSortAscending(wxString* s1, wxString* s2) +int wxCMPFUNC_CONV wxStringSortAscending(wxString* s1, wxString* s2) { - return wxStrcmp(s1->c_str(), s2->c_str()); + return s1->Cmp(*s2); } -int wxStringSortDescending(wxString* s1, wxString* s2) +int wxCMPFUNC_CONV wxStringSortDescending(wxString* s1, wxString* s2) { - return -wxStrcmp(s1->c_str(), s2->c_str()); + return -s1->Cmp(*s2); }