X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/22a5055f1f173fb140b222de69baba5022a63ed3..1e54be64fd06fc0eecccbf75c514a76e2cf23f0c:/src/common/string.cpp diff --git a/src/common/string.cpp b/src/common/string.cpp index 964324306b..2bd4e6178f 100644 --- a/src/common/string.cpp +++ b/src/common/string.cpp @@ -9,7 +9,7 @@ // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma implementation "string.h" #endif @@ -61,14 +61,20 @@ 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 + const size_t wxStringBase::npos = wxSTRING_MAXLEN; +#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) @@ -81,11 +87,13 @@ 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 +#if wxUSE_STD_IOSTREAM // MS Visual C++ version 5.0 provides the new STL headers as well as the old // iostream ones. @@ -129,7 +137,7 @@ wxSTD ostream& operator<<(wxSTD ostream& os, const wxString& str) return os; } -#endif //std::string compatibility +#endif // wxUSE_STD_IOSTREAM // ---------------------------------------------------------------------------- // private classes @@ -172,42 +180,19 @@ void wxStringData::Free() } #endif +#if !wxUSE_STL + // =========================================================================== -// 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 +203,32 @@ 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)); } } -#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?) - } - } - - 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 @@ -362,7 +260,7 @@ bool wxString::AllocBuffer(size_t nLen) } // must be called before changing this string -bool wxString::CopyBeforeWrite() +bool wxStringBase::CopyBeforeWrite() { wxStringData* pData = GetStringData(); @@ -382,7 +280,7 @@ bool wxString::CopyBeforeWrite() } // 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 @@ -426,8 +324,37 @@ bool wxString::AllocBeforeWrite(size_t nLen) return TRUE; } +wxStringBase& wxStringBase::append(size_t n, wxChar ch) +{ + size_type len = length(); + + if ( !CopyBeforeWrite() || !Alloc(len + n) ) { + 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 ) { @@ -479,158 +406,335 @@ bool wxString::Alloc(size_t nLen) return TRUE; } -// shrink to minimal size (releasing extra memory) -bool wxString::Shrink() +wxStringBase::iterator wxStringBase::erase(iterator it) { - wxStringData *pData = GetStringData(); + size_type idx = it - begin(); + erase(idx, 1); + return begin() + idx; +} - size_t nLen = pData->nDataLength; - void *p = realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar)); +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); - if ( p == NULL) { - wxFAIL_MSG( _T("out of memory reallocating wxString data") ); - // keep previous data since reallocation failed - return FALSE; - } + swap(strTmp); + return *this; +} - 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& wxStringBase::insert(size_t nPos, const wxChar *sz, size_t n) +{ + wxASSERT( nPos <= length() ); - m_pchData = pData->data(); + if ( n == npos ) n = wxStrlen(sz); + if ( n == 0 ) return *this; + + if ( !CopyBeforeWrite() || !Alloc(length() + n) ) { + wxFAIL_MSG( _T("out of memory in wxStringBase::insert") ); } - pData->nAllocLength = nLen; + 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 TRUE; + return *this; } -// get the pointer to writable buffer of (at least) nLen bytes -wxChar *wxString::GetWriteBuf(size_t nLen) +void wxStringBase::swap(wxStringBase& str) { - if ( !AllocBeforeWrite(nLen) ) { - // allocation failure handled by caller - return NULL; - } - - wxASSERT( GetStringData()->nRefs == 1 ); - GetStringData()->Validate(FALSE); - - return m_pchData; + wxChar* tmp = str.m_pchData; + str.m_pchData = m_pchData; + m_pchData = tmp; } -// put string back in a reasonable state after GetWriteBuf -void wxString::UngetWriteBuf() +size_t wxStringBase::find(const wxStringBase& str, size_t nStart) const { - GetStringData()->nDataLength = wxStrlen(m_pchData); - GetStringData()->Validate(TRUE); + wxASSERT( str.GetStringData()->IsValid() ); + wxASSERT( nStart <= length() ); + + const wxChar *p = wxStrstr(c_str() + nStart, str.c_str()); + + return p == NULL ? npos : p - c_str(); } -void wxString::UngetWriteBuf(size_t nLen) +size_t wxStringBase::find(const wxChar* sz, size_t nStart, size_t n) const { - GetStringData()->nDataLength = nLen; - GetStringData()->Validate(TRUE); + return find(wxStringBase(sz, n), nStart); } -// --------------------------------------------------------------------------- -// data access -// --------------------------------------------------------------------------- +size_t wxStringBase::find(wxChar ch, size_t nStart) const +{ + wxASSERT( nStart <= length() ); -// all functions are inline in string.h + const wxChar *p = wxStrchr(c_str() + nStart, ch); -// --------------------------------------------------------------------------- -// assignment operators -// --------------------------------------------------------------------------- + return p == NULL ? npos : p - c_str(); +} -// helper function: does real copy -bool wxString::AssignCopy(size_t nSrcLen, const wxChar *pszSrcData) +size_t wxStringBase::rfind(const wxStringBase& str, size_t nStart) const { - 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'); + wxASSERT( str.GetStringData()->IsValid() ); + wxASSERT( nStart == npos || nStart <= length() ); + + // TODO could be made much quicker than that + const wxChar *p = c_str() + (nStart == npos ? length() : nStart); + while ( p >= c_str() + str.length() ) { + if ( wxStrncmp(p - str.length(), str.c_str(), str.length()) == 0 ) + return p - str.length() - c_str(); + p--; } - return TRUE; + + return npos; } -// assigns one string to another -wxString& wxString::operator=(const wxString& stringSrc) +size_t wxStringBase::rfind(const wxChar* sz, size_t nStart, size_t n) const { - wxASSERT( stringSrc.GetStringData()->IsValid() ); + return rfind(wxStringBase(sz, n), nStart); +} - // don't copy string over itself - if ( m_pchData != stringSrc.m_pchData ) { - if ( stringSrc.GetStringData()->IsEmpty() ) { - Reinit(); +size_t wxStringBase::rfind(wxChar ch, size_t nStart) const +{ + if ( nStart == npos ) + { + nStart = length(); } - else { - // adjust references - GetStringData()->Unlock(); - m_pchData = stringSrc.m_pchData; - GetStringData()->Lock(); + else + { + wxASSERT( nStart <= length() ); } - } - return *this; + const wxChar *p = wxStrrchr(c_str(), ch); + + if ( p == NULL ) + return npos; + + size_t result = p - c_str(); + return ( result > nStart ) ? npos : result; } -// assigns a single character -wxString& wxString::operator=(wxChar ch) +size_t wxStringBase::find_first_of(const wxChar* sz, size_t nStart) const { - if ( !AssignCopy(1, &ch) ) { - wxFAIL_MSG( _T("out of memory in wxString::operator=(wxChar)") ); - } - return *this; + const wxChar *start = c_str() + nStart; + const wxChar *firstOf = wxStrpbrk(start, sz); + if ( firstOf ) + return firstOf - c_str(); + else + return npos; } - -// assigns C string -wxString& wxString::operator=(const wxChar *psz) +size_t wxStringBase::find_last_of(const wxChar* sz, size_t nStart) const { - if ( !AssignCopy(wxStrlen(psz), psz) ) { - wxFAIL_MSG( _T("out of memory in wxString::operator=(const wxChar *)") ); - } - return *this; -} + if ( nStart == npos ) + { + nStart = length(); + } + else + { + wxASSERT_MSG( nStart <= length(), + _T("invalid index in find_last_of()") ); + } -#if !wxUSE_UNICODE + for ( const wxChar *p = c_str() + nStart - 1; p >= c_str(); p-- ) + { + if ( wxStrchr(sz, *p) ) + return p - c_str(); + } -// same as 'signed char' variant -wxString& wxString::operator=(const unsigned char* psz) -{ - *this = (const char *)psz; - return *this; + return npos; } -#if wxUSE_WCHAR_T -wxString& wxString::operator=(const wchar_t *pwz) +size_t wxStringBase::find_first_not_of(const wxChar* sz, size_t nStart) const { - wxString str(pwz); - *this = str; + if ( nStart == npos ) + { + nStart = length(); + } + else + { + wxASSERT( nStart <= length() ); + } + + size_t nAccept = wxStrspn(c_str() + nStart, sz); + if ( nAccept >= length() - nStart ) + return npos; + else + return nAccept; +} + +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(); + } + else + { + wxASSERT( nStart <= length() ); + } + + for ( const wxChar *p = c_str() + nStart - 1; p >= c_str(); p-- ) + { + if ( !wxStrchr(sz, *p) ) + return p - c_str(); + } + + return npos; +} + +size_t wxStringBase::find_last_not_of(wxChar ch, size_t nStart) const +{ + if ( nStart == npos ) + { + nStart = length(); + } + else + { + wxASSERT( nStart <= length() ); + } + + for ( const wxChar *p = c_str() + nStart - 1; 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 + + if ( nStart != 0 ) + strTmp.append(c_str(), nStart); + strTmp.append(sz); + strTmp.append(c_str() + nStart + nLen); + + swap(strTmp); return *this; } -#endif -#endif +wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen, + size_t nCount, wxChar ch) +{ + return replace(nStart, nLen, wxStringBase(ch, nCount).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 wxString::ConcatSelf(size_t nSrcLen, const wxChar *pszSrcData) +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(); @@ -653,8 +757,9 @@ 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; } @@ -671,12 +776,283 @@ bool wxString::ConcatSelf(size_t nSrcLen, const wxChar *pszSrcData) // fast concatenation - all is done in our buffer memcpy(m_pchData + nLen, pszSrcData, nSrcLen*sizeof(wxChar)); - m_pchData[nNewLen] = wxT('\0'); // put terminating '\0' - GetStringData()->nDataLength = nNewLen; // and fix the length - } - //else: the string to append was empty - return TRUE; + m_pchData[nNewLen] = wxT('\0'); // put terminating '\0' + GetStringData()->nDataLength = nNewLen; // and fix the length + } + //else: the string to append was empty + 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 wxStrncmp(s1, s2, l1); + else if( l1 < l2 ) + { + int ret = wxStrncmp(s1, s2, l1); + return ret == 0 ? -1 : ret; + } + else if( l1 > l2 ) + { + int ret = wxStrncmp(s1, s2, l2); + return ret == 0 ? +1 : ret; + } + + wxFAIL; // must never get there + return 0; // quiet compilers +} + +#if wxUSE_STL + +int STRINGCLASS::compare(const wxStringBase& str) const +{ + return ::wxDoCmp(data(), length(), str.data(), str.length()); +} + +#endif + +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); +} + +#if wxUSE_STL + +int STRINGCLASS::compare(const wxChar* sz) const +{ + size_t nLen = wxStrlen(sz); + return ::wxDoCmp(data(), length(), sz, nLen); +} + +#endif + +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 +// --------------------------------------------------------------------------- + +#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 == npos ? conv.MB2WC(NULL, psz, 0) : nLength; + } + else + { + // nothing to convert + nLen = 0; + } + + // anything to do? + if ( (nLen != 0) && (nLen != (size_t)-1) ) + { + if ( !Alloc(nLen) ) + { + wxFAIL_MSG( _T("out of memory in wxString::wxString") ); + } + else + { + wxWCharBuffer buf(nLen + 1); + // MB2WC wants the buffer size, not the string length hence +1 + nLen = conv.MB2WC(buf.data(), 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 + assign(buf.data(), nLen); + return; + } + //else: the conversion failed -- leave the string empty (what else?) + } + } +} + +#else // ANSI + +#if wxUSE_WCHAR_T +// from wide string +wxString::wxString(const wchar_t *pwz, wxMBConv& conv, size_t nLength) +{ + // 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 == npos ? conv.WC2MB(NULL, pwz, 0) : nLength; + } + else + { + // nothing to convert + nLen = 0; + } + + // anything to do? + if ( (nLen != 0) && (nLen != (size_t)-1) ) + { + if ( !Alloc(nLen) ) + { + wxFAIL_MSG( _T("out of memory in wxString::wxString") ); + } + else + { + wxCharBuffer buf(nLen); + // WC2MB wants the buffer size, not the string length + if ( conv.WC2MB(buf.data(), pwz, nLen + 1) != (size_t)-1 ) + { + // initialized ok + assign(buf.data(), nLen); + return; + } + //else: the conversion failed -- leave the string empty (what else?) + } + } + + // leave empty +} +#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: @@ -687,8 +1063,10 @@ bool wxString::ConcatSelf(size_t nSrcLen, const wxChar *pszSrcData) wxString operator+(const wxString& str1, const wxString& str2) { +#if !wxUSE_STL wxASSERT( str1.GetStringData()->IsValid() ); wxASSERT( str2.GetStringData()->IsValid() ); +#endif wxString s = str1; s += str2; @@ -698,7 +1076,9 @@ wxString operator+(const wxString& str1, const wxString& str2) wxString operator+(const wxString& str, wxChar ch) { +#if !wxUSE_STL wxASSERT( str.GetStringData()->IsValid() ); +#endif wxString s = str; s += ch; @@ -708,7 +1088,9 @@ wxString operator+(const wxString& str, wxChar ch) wxString operator+(wxChar ch, const wxString& str) { +#if !wxUSE_STL wxASSERT( str.GetStringData()->IsValid() ); +#endif wxString s = ch; s += str; @@ -718,7 +1100,9 @@ wxString operator+(wxChar ch, const wxString& str) wxString operator+(const wxString& str, const wxChar *psz) { +#if !wxUSE_STL wxASSERT( str.GetStringData()->IsValid() ); +#endif wxString s; if ( !s.Alloc(wxStrlen(psz) + str.Len()) ) { @@ -732,7 +1116,9 @@ wxString operator+(const wxString& str, const wxChar *psz) wxString operator+(const wxChar *psz, const wxString& str) { +#if !wxUSE_STL wxASSERT( str.GetStringData()->IsValid() ); +#endif wxString s; if ( !s.Alloc(wxStrlen(psz) + str.Len()) ) { @@ -807,34 +1193,13 @@ 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 ) + // default value of nCount is npos and means "till the end" + if ( nCount == npos ) { nCount = nLen - nFirst; } @@ -851,15 +1216,15 @@ wxString wxString::Mid(size_t nFirst, size_t nCount) const nCount = 0; } - wxString dest; - if ( !AllocCopy(dest, nCount, nFirst) ) { + wxString dest(*this, nFirst, nCount); + if ( dest.length() != nCount ) { wxFAIL_MSG( _T("out of memory in wxString::Mid") ); } return dest; } -// check that the tring starts with prefix and return the rest of the string +// 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 { @@ -891,11 +1256,11 @@ bool wxString::StartsWith(const wxChar *prefix, wxString *rest) const // 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; @@ -918,11 +1283,11 @@ 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 +1297,9 @@ 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 @@ -976,7 +1339,7 @@ wxString::Replace(const wxChar *szOld, const wxChar *szNew, bool bReplaceAll) size_t uiOldLen = wxStrlen(szOld); wxString strTemp; - const wxChar *pCurrent = m_pchData; + const wxChar *pCurrent = c_str(); const wxChar *pSubstr; while ( *pCurrent != wxT('\0') ) { pSubstr = wxStrstr(pCurrent, szOld); @@ -990,7 +1353,9 @@ wxString::Replace(const wxChar *szOld, const wxChar *szNew, bool bReplaceAll) } else { // take chars before match - if ( !strTemp.ConcatSelf(pSubstr - pCurrent, pCurrent) ) { + size_type len = strTemp.length(); + strTemp.append(pCurrent, pSubstr - pCurrent); + if ( strTemp.length() != (size_t)(len + pSubstr - pCurrent) ) { wxFAIL_MSG( _T("out of memory in wxString::Replace") ); return 0; } @@ -1008,15 +1373,11 @@ wxString::Replace(const wxChar *szOld, const wxChar *szNew, bool bReplaceAll) } // only done if there were replacements, otherwise would have returned above - *this = strTemp; + swap(strTemp); return uiCount; } -#ifdef __WXWINCE__ -inline int isascii(wxChar c) { return (c >= 0) && (c <=127); } -#endif - bool wxString::IsAscii() const { const wxChar *s = (const wxChar*) *this; @@ -1063,26 +1424,16 @@ 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; } @@ -1110,34 +1461,26 @@ wxString& wxString::Trim(bool bFromRight) ) ) { - // 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) ) + iterator psz = begin() + length() - 1; + while ( wxSafeIsspace(*psz) && (psz >= begin()) ) psz--; // truncate at trailing space start *++psz = wxT('\0'); - GetStringData()->nDataLength = psz - m_pchData; + erase(psz, end()); } else { // find first non-space character - const wxChar *psz = m_pchData; + iterator psz = begin(); while ( 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; + erase(begin(), psz); } } @@ -1154,7 +1497,7 @@ wxString& wxString::Pad(size_t nCount, wxChar chPad, bool bFromRight) else { s += *this; - *this = s; + swap(s); } return *this; @@ -1164,13 +1507,7 @@ wxString& wxString::Pad(size_t nCount, wxChar chPad, bool bFromRight) wxString& wxString::Truncate(size_t uiLen) { if ( uiLen < Len() ) { - if ( !CopyBeforeWrite() ) { - wxFAIL_MSG( _T("out of memory in wxString::Truncate") ); - return *this; - } - - *(m_pchData + uiLen) = wxT('\0'); - GetStringData()->nDataLength = uiLen; + erase(begin() + uiLen, end()); } //else: nothing to do, string is already short enough @@ -1184,17 +1521,17 @@ 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; } // ---------------------------------------------------------------------------- @@ -1283,22 +1620,27 @@ int wxString::Printf(const wxChar *pszFormat, ...) int wxString::PrintfV(const wxChar* pszFormat, va_list argptr) { int size = 1024; + int len; + for ( ;; ) { - wxChar *buf = GetWriteBuf(size + 1); - if ( !buf ) { - // out of memory - return -1; - } + wxStringBuffer tmp(*this, size + 1); + wxChar* buf = tmp; - int len = wxVsnprintf(buf, size, pszFormat, argptr); + if ( !buf ) + { + // out of memory + return -1; + } - // 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'); + len = wxVsnprintf(buf, size, pszFormat, argptr); - UngetWriteBuf(); + // 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'); + } if ( len >= 0 ) { @@ -1487,278 +1829,6 @@ 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(); -} - -// 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 - -// Gives a duplicate symbol (presumably a case-insensitivity problem) -#if !defined(__BORLANDC__) -size_t wxString::find(wxChar ch, size_t nStart) const -{ - wxASSERT( nStart <= Len() ); - - const wxChar *p = wxStrchr(c_str() + nStart, ch); - - return p == NULL ? npos : p - c_str(); -} -#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)); -} - -wxString& wxString::replace(size_t nStart, size_t nLen, - const wxChar* sz, size_t nCount) -{ - return replace(nStart, nLen, wxString(sz, nCount)); -} - -#endif //std::string compatibility - // ============================================================================ // ArrayString // ============================================================================