X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ead067dedf3af154376d3a570e417afc11efdc34..83a7613b7186bb2597a393b6bcb14166f1e0641d:/src/common/string.cpp diff --git a/src/common/string.cpp b/src/common/string.cpp index b0bc3a1864..a0d42cb42f 100644 --- a/src/common/string.cpp +++ b/src/common/string.cpp @@ -10,13 +10,6 @@ // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -/* - * About ref counting: - * 1) all empty strings use g_strEmpty, nRefs = -1 (set in Init()) - * 2) AllocBuffer() sets nRefs to 1, Lock() increments it by one - * 3) Unlock() decrements nRefs and frees memory if it goes to 0 - */ - // =========================================================================== // headers, declarations, constants // =========================================================================== @@ -30,922 +23,806 @@ #ifndef WX_PRECOMP #include "wx/string.h" + #include "wx/wxcrtvararg.h" #include "wx/intl.h" - #include "wx/thread.h" + #include "wx/log.h" #endif #include -#include -#include -#include - -#ifdef __SALFORDC__ - #include -#endif -// allocating extra space for each string consumes more memory but speeds up -// the concatenation operations (nLen is the current string's length) -// NB: EXTRA_ALLOC must be >= 0! -#define EXTRA_ALLOC (19 - nLen % 16) - -// --------------------------------------------------------------------------- -// static class variables definition -// --------------------------------------------------------------------------- - -#if !wxUSE_STL - //According to STL _must_ be a -1 size_t - const size_t wxStringBase::npos = (size_t) -1; +#ifndef __WXWINCE__ + #include #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) -static const struct -{ - wxStringData data; - wxChar dummy; -} g_strEmpty = { {-1, 0, 0}, wxT('\0') }; - -// empty C style string: points to 'string data' byte of g_strEmpty -extern const wxChar WXDLLIMPEXP_BASE *wxEmptyString = &g_strEmpty.dummy; +#include +#include -#endif +#include "wx/hashmap.h" +#include "wx/vector.h" +#include "wx/xlocale.h" -// ---------------------------------------------------------------------------- -// global functions -// ---------------------------------------------------------------------------- +#ifdef __WXMSW__ + #include "wx/msw/wrapwin.h" +#endif // __WXMSW__ #if wxUSE_STD_IOSTREAM - -#include - -wxSTD ostream& operator<<(wxSTD ostream& os, const wxString& str) -{ -#ifdef __BORLANDC__ - os << str.mb_str(); -#else - os << str.c_str(); + #include #endif - return os; -} - -#endif // wxUSE_STD_IOSTREAM - -// ---------------------------------------------------------------------------- -// private classes -// ---------------------------------------------------------------------------- -// this small class is used to gather statistics for performance tuning -//#define WXSTRING_STATISTICS -#ifdef WXSTRING_STATISTICS - class Averager - { - public: - Averager(const wxChar *sz) { m_sz = sz; m_nTotal = m_nCount = 0; } - ~Averager() - { wxPrintf("wxString: average %s = %f\n", m_sz, ((float)m_nTotal)/m_nCount); } - - void Add(size_t n) { m_nTotal += n; m_nCount++; } - - private: - size_t m_nCount, m_nTotal; - const wxChar *m_sz; - } g_averageLength("allocation size"), - g_averageSummandLength("summand length"), - g_averageConcatHit("hit probability in concat"), - g_averageInitialLength("initial string length"); - - #define STATISTICS_ADD(av, val) g_average##av.Add(val) +// string handling functions used by wxString: +#if wxUSE_UNICODE_UTF8 + #define wxStringMemcpy memcpy + #define wxStringMemcmp memcmp + #define wxStringMemchr memchr + #define wxStringStrlen strlen #else - #define STATISTICS_ADD(av, val) -#endif // WXSTRING_STATISTICS - -#if !wxUSE_STL - -// =========================================================================== -// wxStringData class deallocation -// =========================================================================== - -#if defined(__VISUALC__) && defined(_MT) && !defined(_DLL) -# pragma message (__FILE__ ": building with Multithreaded non DLL runtime has a performance impact on wxString!") -void wxStringData::Free() -{ - free(this); -} + #define wxStringMemcpy wxTmemcpy + #define wxStringMemcmp wxTmemcmp + #define wxStringMemchr wxTmemchr + #define wxStringStrlen wxStrlen #endif -// =========================================================================== -// wxStringBase -// =========================================================================== - -// takes nLength elements of psz starting at nPos -void wxStringBase::InitWith(const wxChar *psz, size_t nPos, size_t nLength) +// define a function declared in wx/buffer.h here as we don't have buffer.cpp +// and don't want to add it just because of this simple function +namespace wxPrivate { - Init(); - - // if the length is not given, assume the string to be NUL terminated - if ( nLength == npos ) { - wxASSERT_MSG( nPos <= wxStrlen(psz), _T("index out of bounds") ); - - nLength = wxStrlen(psz + nPos); - } - STATISTICS_ADD(InitialLength, nLength); - - if ( nLength > 0 ) { - // trailing '\0' is written in AllocBuffer() - if ( !AllocBuffer(nLength) ) { - wxFAIL_MSG( _T("out of memory in wxStringBase::InitWith") ); - return; - } - wxTmemcpy(m_pchData, psz + nPos, nLength); - } -} - -// poor man's iterators are "void *" pointers -wxStringBase::wxStringBase(const void *pStart, const void *pEnd) +// wxXXXBuffer classes can be (implicitly) used during global statics +// initialization so wrap the status UntypedBufferData variable in a function +// to make it safe to access it even before all global statics are initialized +UntypedBufferData *GetUntypedNullData() { - if ( pEnd >= pStart ) - { - InitWith((const wxChar *)pStart, 0, - (const wxChar *)pEnd - (const wxChar *)pStart); - } - else - { - wxFAIL_MSG( _T("pStart is not before pEnd") ); - Init(); - } -} + static UntypedBufferData s_untypedNullData(NULL, 0); -wxStringBase::wxStringBase(size_type n, wxChar ch) -{ - Init(); - append(n, ch); + return &s_untypedNullData; } +} // namespace wxPrivate + // --------------------------------------------------------------------------- -// memory allocation +// static class variables definition // --------------------------------------------------------------------------- -// allocates memory needed to store a C string of length nLen -bool wxStringBase::AllocBuffer(size_t nLen) -{ - // allocating 0 sized buffer doesn't make sense, all empty strings should - // reuse g_strEmpty - wxASSERT( nLen > 0 ); +//According to STL _must_ be a -1 size_t +const size_t wxString::npos = (size_t) -1; - // make sure that we don't overflow - wxASSERT( nLen < (INT_MAX / sizeof(wxChar)) - - (sizeof(wxStringData) + EXTRA_ALLOC + 1) ); +#if wxUSE_STRING_POS_CACHE - STATISTICS_ADD(Length, nLen); +#ifdef wxHAS_COMPILER_TLS - // allocate memory: - // 1) one extra character for '\0' termination - // 2) sizeof(wxStringData) for housekeeping info - wxStringData* pData = (wxStringData*) - malloc(sizeof(wxStringData) + (nLen + EXTRA_ALLOC + 1)*sizeof(wxChar)); +wxTLS_TYPE(wxString::Cache) wxString::ms_cache; - if ( pData == NULL ) { - // allocation failures are handled by the caller - return false; - } +#else // !wxHAS_COMPILER_TLS - pData->nRefs = 1; - pData->nDataLength = nLen; - pData->nAllocLength = nLen + EXTRA_ALLOC; - m_pchData = pData->data(); // data starts after wxStringData - m_pchData[nLen] = wxT('\0'); - return true; -} - -// must be called before changing this string -bool wxStringBase::CopyBeforeWrite() +struct wxStrCacheInitializer { - wxStringData* pData = GetStringData(); - - if ( pData->IsShared() ) { - pData->Unlock(); // memory not freed because shared - size_t nLen = pData->nDataLength; - if ( !AllocBuffer(nLen) ) { - // allocation failures are handled by the caller - return false; + wxStrCacheInitializer() + { + // calling this function triggers s_cache initialization in it, and + // from now on it becomes safe to call from multiple threads + wxString::GetCache(); } - wxTmemcpy(m_pchData, pData->data(), nLen); - } - - wxASSERT( !GetStringData()->IsShared() ); // we must be the only owner +}; - return true; -} - -// must be called before replacing contents of this string -bool wxStringBase::AllocBeforeWrite(size_t nLen) +/* +wxString::Cache& wxString::GetCache() { - wxASSERT( nLen != 0 ); // doesn't make any sense + static wxTLS_TYPE(Cache) s_cache; - // must not share string and must have enough space - wxStringData* pData = GetStringData(); - if ( pData->IsShared() || pData->IsEmpty() ) { - // can't work with old buffer, get new one - pData->Unlock(); - if ( !AllocBuffer(nLen) ) { - // allocation failures are handled by the caller - return false; - } - } - else { - if ( nLen > pData->nAllocLength ) { - // realloc the buffer instead of calling malloc() again, this is more - // efficient - STATISTICS_ADD(Length, nLen); + return wxTLS_VALUE(s_cache); +} +*/ - nLen += EXTRA_ALLOC; +static wxStrCacheInitializer gs_stringCacheInit; - pData = (wxStringData*) - realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar)); +#endif // wxHAS_COMPILER_TLS/!wxHAS_COMPILER_TLS - if ( pData == NULL ) { - // allocation failures are handled by the caller - // keep previous data since reallocation failed - return false; - } +// gdb seems to be unable to display thread-local variables correctly, at least +// not my 6.4.98 version under amd64, so provide this debugging helper to do it +#if wxDEBUG_LEVEL >= 2 - pData->nAllocLength = nLen; - m_pchData = pData->data(); +struct wxStrCacheDumper +{ + static void ShowAll() + { + puts("*** wxString cache dump:"); + for ( unsigned n = 0; n < wxString::Cache::SIZE; n++ ) + { + const wxString::Cache::Element& + c = wxString::GetCacheBegin()[n]; + + printf("\t%u%s\t%p: pos=(%lu, %lu), len=%ld\n", + n, + n == wxString::LastUsedCacheElement() ? " [*]" : "", + c.str, + (unsigned long)c.pos, + (unsigned long)c.impl, + (long)c.len); + } } - } +}; - wxASSERT( !GetStringData()->IsShared() ); // we must be the only owner +void wxDumpStrCache() { wxStrCacheDumper::ShowAll(); } - // 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; +#endif // wxDEBUG_LEVEL >= 2 - return true; -} +#ifdef wxPROFILE_STRING_CACHE -wxStringBase& wxStringBase::append(size_t n, wxChar ch) -{ - size_type len = length(); +wxString::CacheStats wxString::ms_cacheStats; - 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) +struct wxStrCacheStatsDumper { - size_t len = length(); - - if ( nSize < len ) + ~wxStrCacheStatsDumper() { - erase(begin() + nSize, end()); - } - else if ( nSize > len ) - { - append(nSize - len, ch); + const wxString::CacheStats& stats = wxString::ms_cacheStats; + + if ( stats.postot ) + { + puts("*** wxString cache statistics:"); + printf("\tTotal non-trivial calls to PosToImpl(): %u\n", + stats.postot); + printf("\tHits %u (of which %u not used) or %.2f%%\n", + stats.poshits, + stats.mishits, + 100.*float(stats.poshits - stats.mishits)/stats.postot); + printf("\tAverage position requested: %.2f\n", + float(stats.sumpos) / stats.postot); + printf("\tAverage offset after cached hint: %.2f\n", + float(stats.sumofs) / stats.postot); + } + + if ( stats.lentot ) + { + printf("\tNumber of calls to length(): %u, hits=%.2f%%\n", + stats.lentot, 100.*float(stats.lenhits)/stats.lentot); + } } - //else: we have exactly the specified length, nothing to do -} +}; -// allocate enough memory for nLen characters -bool wxStringBase::Alloc(size_t nLen) -{ - wxStringData *pData = GetStringData(); - if ( pData->nAllocLength <= nLen ) { - if ( pData->IsEmpty() ) { - nLen += EXTRA_ALLOC; +static wxStrCacheStatsDumper s_showCacheStats; - pData = (wxStringData *) - malloc(sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar)); +#endif // wxPROFILE_STRING_CACHE - if ( pData == NULL ) { - // allocation failure handled by caller - return false; - } +#endif // wxUSE_STRING_POS_CACHE - pData->nRefs = 1; - pData->nDataLength = 0; - pData->nAllocLength = nLen; - m_pchData = pData->data(); // data starts after wxStringData - m_pchData[0u] = wxT('\0'); - } - else if ( pData->IsShared() ) { - pData->Unlock(); // memory not freed because shared - size_t nOldLen = pData->nDataLength; - if ( !AllocBuffer(nLen) ) { - // allocation failure handled by caller - return false; - } - // +1 to copy the terminator, too - memcpy(m_pchData, pData->data(), (nOldLen+1)*sizeof(wxChar)); - GetStringData()->nDataLength = nOldLen; - } - else { - nLen += EXTRA_ALLOC; +// ---------------------------------------------------------------------------- +// global functions +// ---------------------------------------------------------------------------- - pData = (wxStringData *) - realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar)); +#if wxUSE_STD_IOSTREAM - if ( pData == NULL ) { - // allocation failure handled by caller - // keep previous data since reallocation failed - return false; - } +#include - // it's not important if the pointer changed or not (the check for this - // is not faster than assigning to m_pchData in all cases) - pData->nAllocLength = nLen; - m_pchData = pData->data(); - } - } - //else: we've already got enough - return true; +wxSTD ostream& operator<<(wxSTD ostream& os, const wxCStrData& str) +{ +#if wxUSE_UNICODE && !wxUSE_UNICODE_UTF8 + const wxScopedCharBuffer buf(str.AsCharBuf()); + if ( !buf ) + os.clear(wxSTD ios_base::failbit); + else + os << buf.data(); + + return os; +#else + return os << str.AsInternal(); +#endif } -wxStringBase::iterator wxStringBase::begin() +wxSTD ostream& operator<<(wxSTD ostream& os, const wxString& str) { - if (length() > 0) - CopyBeforeWrite(); - return m_pchData; + return os << str.c_str(); } -wxStringBase::iterator wxStringBase::end() +wxSTD ostream& operator<<(wxSTD ostream& os, const wxScopedCharBuffer& str) { - if (length() > 0) - CopyBeforeWrite(); - return m_pchData + length(); + return os << str.data(); } -wxStringBase::iterator wxStringBase::erase(iterator it) +#ifndef __BORLANDC__ +wxSTD ostream& operator<<(wxSTD ostream& os, const wxScopedWCharBuffer& str) { - size_type idx = it - begin(); - erase(idx, 1); - return begin() + idx; + return os << str.data(); } +#endif + +#if wxUSE_UNICODE && defined(HAVE_WOSTREAM) -wxStringBase& wxStringBase::erase(size_t nStart, size_t nLen) +wxSTD wostream& operator<<(wxSTD wostream& wos, const wxString& str) { - 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 wos << str.wc_str(); +} - swap(strTmp); - return *this; +wxSTD wostream& operator<<(wxSTD wostream& wos, const wxCStrData& str) +{ + return wos << str.AsWChar(); } -wxStringBase& wxStringBase::insert(size_t nPos, const wxChar *sz, size_t n) +wxSTD wostream& operator<<(wxSTD wostream& wos, const wxScopedWCharBuffer& str) { - wxASSERT( nPos <= length() ); + return wos << str.data(); +} - if ( n == npos ) n = wxStrlen(sz); - if ( n == 0 ) return *this; +#endif // wxUSE_UNICODE && defined(HAVE_WOSTREAM) - if ( !Alloc(length() + n) || !CopyBeforeWrite() ) { - wxFAIL_MSG( _T("out of memory in wxStringBase::insert") ); - } +#endif // wxUSE_STD_IOSTREAM - 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'; +// =========================================================================== +// wxString class core +// =========================================================================== - return *this; -} +#if wxUSE_UNICODE_UTF8 -void wxStringBase::swap(wxStringBase& str) +void wxString::PosLenToImpl(size_t pos, size_t len, + size_t *implPos, size_t *implLen) const { - wxChar* tmp = str.m_pchData; - str.m_pchData = m_pchData; - m_pchData = tmp; + if ( pos == npos ) + { + *implPos = npos; + } + else // have valid start position + { + const const_iterator b = GetIterForNthChar(pos); + *implPos = wxStringImpl::const_iterator(b.impl()) - m_impl.begin(); + if ( len == npos ) + { + *implLen = npos; + } + else // have valid length too + { + // we need to handle the case of length specifying a substring + // going beyond the end of the string, just as std::string does + const const_iterator e(end()); + const_iterator i(b); + while ( len && i <= e ) + { + ++i; + --len; + } + + *implLen = i.impl() - b.impl(); + } + } } -size_t wxStringBase::find(const wxStringBase& str, size_t nStart) const -{ - // deal with the special case of empty string first - const size_t nLen = length(); - const size_t nLenOther = str.length(); +#endif // wxUSE_UNICODE_UTF8 - if ( !nLenOther ) - { - // empty string is a substring of anything - return 0; - } +// ---------------------------------------------------------------------------- +// wxCStrData converted strings caching +// ---------------------------------------------------------------------------- - if ( !nLen ) +// FIXME-UTF8: temporarily disabled because it doesn't work with global +// string objects; re-enable after fixing this bug and benchmarking +// performance to see if using a hash is a good idea at all +#if 0 + +// For backward compatibility reasons, it must be possible to assign the value +// returned by wxString::c_str() to a char* or wchar_t* variable and work with +// it. Returning wxCharBuffer from (const char*)c_str() wouldn't do the trick, +// because the memory would be freed immediately, but it has to be valid as long +// as the string is not modified, so that code like this still works: +// +// const wxChar *s = str.c_str(); +// while ( s ) { ... } + +// FIXME-UTF8: not thread safe! +// FIXME-UTF8: we currently clear the cached conversion only when the string is +// destroyed, but we should do it when the string is modified, to +// keep memory usage down +// FIXME-UTF8: we do the conversion every time As[W]Char() is called, but if we +// invalidated the cache on every change, we could keep the previous +// conversion +// FIXME-UTF8: add tracing of usage of these two methods - new code is supposed +// to use mb_str() or wc_str() instead of (const [w]char*)c_str() + +template +static inline void DeleteStringFromConversionCache(T& hash, const wxString *s) +{ + typename T::iterator i = hash.find(wxConstCast(s, wxString)); + if ( i != hash.end() ) { - // the other string is non empty so can't be our substring - return npos; + free(i->second); + hash.erase(i); } +} - wxASSERT( str.GetStringData()->IsValid() ); - wxASSERT( nStart <= nLen ); +#if wxUSE_UNICODE +// NB: non-STL implementation doesn't compile with "const wxString*" key type, +// so we have to use wxString* here and const-cast when used +WX_DECLARE_HASH_MAP(wxString*, char*, wxPointerHash, wxPointerEqual, + wxStringCharConversionCache); +static wxStringCharConversionCache gs_stringsCharCache; - const wxChar * const other = str.c_str(); +const char* wxCStrData::AsChar() const +{ + // remove previously cache value, if any (see FIXMEs above): + DeleteStringFromConversionCache(gs_stringsCharCache, m_str); - // anchor - const wxChar* p = (const wxChar*)wxTmemchr(c_str() + nStart, - *other, - nLen - nStart); + // convert the string and keep it: + const char *s = gs_stringsCharCache[wxConstCast(m_str, wxString)] = + m_str->mb_str().release(); - if ( !p ) - return npos; + return s + m_offset; +} +#endif // wxUSE_UNICODE - while ( p - c_str() + nLenOther <= nLen && wxTmemcmp(p, other, nLenOther) ) - { - p++; +#if !wxUSE_UNICODE_WCHAR +WX_DECLARE_HASH_MAP(wxString*, wchar_t*, wxPointerHash, wxPointerEqual, + wxStringWCharConversionCache); +static wxStringWCharConversionCache gs_stringsWCharCache; - // anchor again - p = (const wxChar*)wxTmemchr(p, *other, nLen - (p - c_str())); +const wchar_t* wxCStrData::AsWChar() const +{ + // remove previously cache value, if any (see FIXMEs above): + DeleteStringFromConversionCache(gs_stringsWCharCache, m_str); - if ( !p ) - return npos; - } + // convert the string and keep it: + const wchar_t *s = gs_stringsWCharCache[wxConstCast(m_str, wxString)] = + m_str->wc_str().release(); - return p - c_str() + nLenOther <= nLen ? p - c_str() : npos; + return s + m_offset; } +#endif // !wxUSE_UNICODE_WCHAR -size_t wxStringBase::find(const wxChar* sz, size_t nStart, size_t n) const +wxString::~wxString() { - return find(wxStringBase(sz, n), nStart); +#if wxUSE_UNICODE + // FIXME-UTF8: do this only if locale is not UTF8 if wxUSE_UNICODE_UTF8 + DeleteStringFromConversionCache(gs_stringsCharCache, this); +#endif +#if !wxUSE_UNICODE_WCHAR + DeleteStringFromConversionCache(gs_stringsWCharCache, this); +#endif } +#endif + +// =========================================================================== +// wxString class core +// =========================================================================== -size_t wxStringBase::find(wxChar ch, size_t nStart) const +// --------------------------------------------------------------------------- +// construction and conversion +// --------------------------------------------------------------------------- + +#if wxUSE_UNICODE_WCHAR +/* static */ +wxString::SubstrBufFromMB wxString::ConvertStr(const char *psz, size_t nLength, + const wxMBConv& conv) { - wxASSERT( nStart <= length() ); + // anything to do? + if ( !psz || nLength == 0 ) + return SubstrBufFromMB(wxWCharBuffer(L""), 0); - const wxChar *p = (const wxChar*)wxTmemchr(c_str() + nStart, ch, length() - nStart); + if ( nLength == npos ) + nLength = wxNO_LEN; - return p == NULL ? npos : p - c_str(); + size_t wcLen; + wxScopedWCharBuffer wcBuf(conv.cMB2WC(psz, nLength, &wcLen)); + if ( !wcLen ) + return SubstrBufFromMB(wxWCharBuffer(L""), 0); + else + return SubstrBufFromMB(wcBuf, wcLen); } +#endif // wxUSE_UNICODE_WCHAR -size_t wxStringBase::rfind(const wxStringBase& str, size_t nStart) const +#if wxUSE_UNICODE_UTF8 +/* static */ +wxString::SubstrBufFromMB wxString::ConvertStr(const char *psz, size_t nLength, + const wxMBConv& conv) { - wxASSERT( str.GetStringData()->IsValid() ); - wxASSERT( nStart == npos || nStart <= length() ); + // anything to do? + if ( !psz || nLength == 0 ) + return SubstrBufFromMB(wxCharBuffer(""), 0); - if ( length() >= str.length() ) + // if psz is already in UTF-8, we don't have to do the roundtrip to + // wchar_t* and back: + if ( conv.IsUTF8() ) { - // avoids a corner case later - if ( length() == 0 && str.length() == 0 ) - return 0; + // we need to validate the input because UTF8 iterators assume valid + // UTF-8 sequence and psz may be invalid: + if ( wxStringOperations::IsValidUtf8String(psz, nLength) ) + { + // we must pass the real string length to SubstrBufFromMB ctor + if ( nLength == npos ) + nLength = psz ? strlen(psz) : 0; + return SubstrBufFromMB(wxScopedCharBuffer::CreateNonOwned(psz, nLength), + nLength); + } + // else: do the roundtrip through wchar_t* + } - // "top" is the point where search starts from - size_t top = length() - str.length(); + if ( nLength == npos ) + nLength = wxNO_LEN; - if ( nStart == npos ) - nStart = length() - 1; - if ( nStart < top ) - top = nStart; + // first convert to wide string: + size_t wcLen; + wxScopedWCharBuffer wcBuf(conv.cMB2WC(psz, nLength, &wcLen)); + if ( !wcLen ) + return SubstrBufFromMB(wxCharBuffer(""), 0); - const wxChar *cursor = c_str() + top; - do - { - if ( wxTmemcmp(cursor, str.c_str(), - str.length()) == 0 ) - { - return cursor - c_str(); - } - } while ( cursor-- > c_str() ); - } + // and then to UTF-8: + SubstrBufFromMB buf(ConvertStr(wcBuf, wcLen, wxMBConvStrictUTF8())); + // widechar -> UTF-8 conversion isn't supposed to ever fail: + wxASSERT_MSG( buf.data, wxT("conversion to UTF-8 failed") ); - return npos; + return buf; } +#endif // wxUSE_UNICODE_UTF8 -size_t wxStringBase::rfind(const wxChar* sz, size_t nStart, size_t n) const +#if wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE +/* static */ +wxString::SubstrBufFromWC wxString::ConvertStr(const wchar_t *pwz, size_t nLength, + const wxMBConv& conv) { - return rfind(wxStringBase(sz, n), nStart); -} + // anything to do? + if ( !pwz || nLength == 0 ) + return SubstrBufFromWC(wxCharBuffer(""), 0); -size_t wxStringBase::rfind(wxChar ch, size_t nStart) const -{ - if ( nStart == npos ) - { - nStart = length(); - } + if ( nLength == npos ) + nLength = wxNO_LEN; + + size_t mbLen; + wxScopedCharBuffer mbBuf(conv.cWC2MB(pwz, nLength, &mbLen)); + if ( !mbLen ) + return SubstrBufFromWC(wxCharBuffer(""), 0); else + return SubstrBufFromWC(mbBuf, mbLen); +} +#endif // wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE + +// This std::string::c_str()-like method returns a wide char pointer to string +// contents. In wxUSE_UNICODE_WCHAR case it is trivial as it can simply return +// a pointer to the internal representation. Otherwise a conversion is required +// and it returns a temporary buffer. +// +// However for compatibility with c_str() and to avoid breaking existing code +// doing +// +// for ( const wchar_t *p = s.wc_str(); *p; p++ ) +// ... use *p... +// +// we actually need to ensure that the returned buffer is _not_ temporary and +// so we use wxString::m_convertedToWChar to store the returned data +#if !wxUSE_UNICODE_WCHAR + +const wchar_t *wxString::AsWChar(const wxMBConv& conv) const +{ + const char * const strMB = m_impl.c_str(); + const size_t lenMB = m_impl.length(); + + // find out the size of the buffer needed + const size_t lenWC = conv.ToWChar(NULL, 0, strMB, lenMB); + if ( lenWC == wxCONV_FAILED ) + return NULL; + + // keep the same buffer if the string size didn't change: this is not only + // an optimization but also ensure that code which modifies string + // character by character (without changing its length) can continue to use + // the pointer returned by a previous wc_str() call even after changing the + // string + + // TODO-UTF8: we could check for ">" instead of "!=" here as this would + // allow to save on buffer reallocations but at the cost of + // consuming (even) more memory, we should benchmark this to + // determine if it's worth doing + if ( !m_convertedToWChar.m_str || lenWC != m_convertedToWChar.m_len ) { - wxASSERT( nStart <= length() ); + if ( !const_cast(this)->m_convertedToWChar.Extend(lenWC) ) + return NULL; } - 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(); - } + // finally do convert + m_convertedToWChar.m_str[lenWC] = L'\0'; + if ( conv.ToWChar(m_convertedToWChar.m_str, lenWC, + strMB, lenMB) == wxCONV_FAILED ) + return NULL; - return npos; + return m_convertedToWChar.m_str; } -size_t wxStringBase::find_first_of(const wxChar* sz, size_t nStart) const +#endif // !wxUSE_UNICODE_WCHAR + + +// Same thing for mb_str() which returns a normal char pointer to string +// contents: this always requires converting it to the specified encoding in +// non-ANSI build except if we need to convert to UTF-8 and this is what we +// already use internally. +#if wxUSE_UNICODE + +const char *wxString::AsChar(const wxMBConv& conv) const { - wxASSERT(nStart <= length()); +#if wxUSE_UNICODE_UTF8 + if ( conv.IsUTF8() ) + return m_impl.c_str(); + + const wchar_t * const strWC = AsWChar(wxMBConvStrictUTF8()); + const size_t lenWC = m_convertedToWChar.m_len; +#else // wxUSE_UNICODE_WCHAR + const wchar_t * const strWC = m_impl.c_str(); + const size_t lenWC = m_impl.length(); +#endif // wxUSE_UNICODE_UTF8/wxUSE_UNICODE_WCHAR - size_t len = wxStrlen(sz); + const size_t lenMB = conv.FromWChar(NULL, 0, strWC, lenWC); + if ( lenMB == wxCONV_FAILED ) + return NULL; - size_t i; - for(i = nStart; i < this->length(); ++i) + if ( !m_convertedToChar.m_str || lenMB != m_convertedToChar.m_len ) { - if (wxTmemchr(sz, *(c_str() + i), len)) - break; + if ( !const_cast(this)->m_convertedToChar.Extend(lenMB) ) + return NULL; } - if(i == this->length()) - return npos; - else - return i; + m_convertedToChar.m_str[lenMB] = '\0'; + if ( conv.FromWChar(m_convertedToChar.m_str, lenMB, + strWC, lenWC) == wxCONV_FAILED ) + return NULL; + + return m_convertedToChar.m_str; } -size_t wxStringBase::find_first_of(const wxChar* sz, size_t nStart, - size_t n) const +#endif // wxUSE_UNICODE + +// shrink to minimal size (releasing extra memory) +bool wxString::Shrink() { - return find_first_of(wxStringBase(sz, n), nStart); + wxString tmp(begin(), end()); + swap(tmp); + return tmp.length() == length(); } -size_t wxStringBase::find_last_of(const wxChar* sz, size_t nStart) const +// deprecated compatibility code: +#if WXWIN_COMPATIBILITY_2_8 && !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8 +wxStringCharType *wxString::GetWriteBuf(size_t nLen) { - 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; + return DoGetWriteBuf(nLen); } -size_t wxStringBase::find_last_of(const wxChar* sz, size_t nStart, - size_t n) const +void wxString::UngetWriteBuf() { - return find_last_of(wxStringBase(sz, n), nStart); + DoUngetWriteBuf(); } -size_t wxStringBase::find_first_not_of(const wxChar* sz, size_t nStart) const +void wxString::UngetWriteBuf(size_t nLen) { - if ( nStart == npos ) - { - nStart = length(); - } - else - { - wxASSERT( nStart <= length() ); - } + DoUngetWriteBuf(nLen); +} +#endif // WXWIN_COMPATIBILITY_2_8 && !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8 - size_t len = wxStrlen(sz); - size_t i; - for(i = nStart; i < this->length(); ++i) - { - if (!wxTmemchr(sz, *(c_str() + i), len)) - break; - } +// --------------------------------------------------------------------------- +// data access +// --------------------------------------------------------------------------- - if(i == this->length()) - return npos; - else - return i; -} +// all functions are inline in string.h -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); -} +// --------------------------------------------------------------------------- +// concatenation operators +// --------------------------------------------------------------------------- + +/* + * concatenation functions come in 5 flavours: + * string + string + * char + string and string + char + * C str + string and string + C str + */ -size_t wxStringBase::find_first_not_of(wxChar ch, size_t nStart) const +wxString operator+(const wxString& str1, const wxString& str2) { - wxASSERT( nStart <= length() ); +#if !wxUSE_STL_BASED_WXSTRING + wxASSERT( str1.IsValid() ); + wxASSERT( str2.IsValid() ); +#endif - for ( const wxChar *p = c_str() + nStart; *p; p++ ) - { - if ( *p != ch ) - return p - c_str(); - } + wxString s = str1; + s += str2; - return npos; + return s; } -size_t wxStringBase::find_last_not_of(const wxChar* sz, size_t nStart) const +wxString operator+(const wxString& str, wxUniChar ch) { - if ( nStart == npos ) - { - nStart = length() - 1; - } - else - { - wxASSERT( nStart <= length() ); - } - - size_t len = wxStrlen(sz); +#if !wxUSE_STL_BASED_WXSTRING + wxASSERT( str.IsValid() ); +#endif - for ( const wxChar *p = c_str() + nStart; p >= c_str(); --p ) - { - if ( !wxTmemchr(sz, *p,len) ) - return p - c_str(); - } + wxString s = str; + s += ch; - return npos; + return s; } -size_t wxStringBase::find_last_not_of(const wxChar* sz, size_t nStart, - size_t n) const +wxString operator+(wxUniChar ch, const wxString& str) { - return find_last_not_of(wxStringBase(sz, n), nStart); +#if !wxUSE_STL_BASED_WXSTRING + wxASSERT( str.IsValid() ); +#endif + + wxString s = ch; + s += str; + + return s; } -size_t wxStringBase::find_last_not_of(wxChar ch, size_t nStart) const +wxString operator+(const wxString& str, const char *psz) { - if ( nStart == npos ) - { - nStart = length() - 1; - } - else - { - wxASSERT( nStart <= length() ); - } +#if !wxUSE_STL_BASED_WXSTRING + wxASSERT( str.IsValid() ); +#endif - for ( const wxChar *p = c_str() + nStart; p >= c_str(); --p ) - { - if ( *p != ch ) - return p - c_str(); + wxString s; + if ( !s.Alloc(strlen(psz) + str.length()) ) { + wxFAIL_MSG( wxT("out of memory in wxString::operator+") ); } + s += str; + s += psz; - return npos; + return s; } -wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen, - const wxChar *sz) +wxString operator+(const wxString& str, const wchar_t *pwz) { - wxASSERT_MSG( nStart <= length(), - _T("index out of bounds in wxStringBase::replace") ); - size_t strLen = length() - nStart; - nLen = strLen < nLen ? strLen : nLen; +#if !wxUSE_STL_BASED_WXSTRING + wxASSERT( str.IsValid() ); +#endif - wxStringBase strTmp; - strTmp.reserve(length()); // micro optimisation to avoid multiple mem allocs + wxString s; + if ( !s.Alloc(wxWcslen(pwz) + str.length()) ) { + wxFAIL_MSG( wxT("out of memory in wxString::operator+") ); + } + s += str; + s += pwz; - //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]); + return s; +} - //its safe to do the full version here because - //sz must be a normal c string - strTmp.append(sz); +wxString operator+(const char *psz, const wxString& str) +{ +#if !wxUSE_STL_BASED_WXSTRING + wxASSERT( str.IsValid() ); +#endif - for(size_t i2 = nStart + nLen; i2 < length(); ++i2) - strTmp.append(1, this->c_str()[i2]); + wxString s; + if ( !s.Alloc(strlen(psz) + str.length()) ) { + wxFAIL_MSG( wxT("out of memory in wxString::operator+") ); + } + s = psz; + s += str; - swap(strTmp); - return *this; + return s; } -wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen, - size_t nCount, wxChar ch) +wxString operator+(const wchar_t *pwz, const wxString& str) { - return replace(nStart, nLen, wxStringBase(nCount, ch).c_str()); +#if !wxUSE_STL_BASED_WXSTRING + wxASSERT( str.IsValid() ); +#endif + + wxString s; + if ( !s.Alloc(wxWcslen(pwz) + str.length()) ) { + wxFAIL_MSG( wxT("out of memory in wxString::operator+") ); + } + s = pwz; + s += str; + + return s; } -wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen, - const wxStringBase& str, - size_t nStart2, size_t nLen2) +// --------------------------------------------------------------------------- +// string comparison +// --------------------------------------------------------------------------- + +bool wxString::IsSameAs(wxUniChar c, bool compareWithCase) const { - return replace(nStart, nLen, str.substr(nStart2, nLen2)); + return (length() == 1) && (compareWithCase ? GetChar(0u) == c + : wxToupper(GetChar(0u)) == wxToupper(c)); } -wxStringBase& wxStringBase::replace(size_t nStart, size_t nLen, - const wxChar* sz, size_t nCount) +#ifdef HAVE_STD_STRING_COMPARE + +// NB: Comparison code (both if HAVE_STD_STRING_COMPARE and if not) works with +// UTF-8 encoded strings too, thanks to UTF-8's design which allows us to +// sort strings in characters code point order by sorting the byte sequence +// in byte values order (i.e. what strcmp() and memcmp() do). + +int wxString::compare(const wxString& str) const { - return replace(nStart, nLen, wxStringBase(sz, nCount).c_str()); + return m_impl.compare(str.m_impl); } -wxStringBase wxStringBase::substr(size_t nStart, size_t nLen) const +int wxString::compare(size_t nStart, size_t nLen, + const wxString& str) const { - if ( nLen == npos ) - nLen = length() - nStart; - return wxStringBase(*this, nStart, nLen); + size_t pos, len; + PosLenToImpl(nStart, nLen, &pos, &len); + return m_impl.compare(pos, len, str.m_impl); } -// assigns one string to another -wxStringBase& wxStringBase::operator=(const wxStringBase& stringSrc) +int wxString::compare(size_t nStart, size_t nLen, + const wxString& str, + size_t nStart2, size_t nLen2) const { - wxASSERT( stringSrc.GetStringData()->IsValid() ); + size_t pos, len; + PosLenToImpl(nStart, nLen, &pos, &len); - // 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(); - } - } + size_t pos2, len2; + str.PosLenToImpl(nStart2, nLen2, &pos2, &len2); - return *this; + return m_impl.compare(pos, len, str.m_impl, pos2, len2); } -// assigns a single character -wxStringBase& wxStringBase::operator=(wxChar ch) +int wxString::compare(const char* sz) const { - if ( !AssignCopy(1, &ch) ) { - wxFAIL_MSG( _T("out of memory in wxStringBase::operator=(wxChar)") ); - } - return *this; + return m_impl.compare(ImplStr(sz)); } -// assigns C string -wxStringBase& wxStringBase::operator=(const wxChar *psz) +int wxString::compare(const wchar_t* sz) const { - if ( !AssignCopy(wxStrlen(psz), psz) ) { - wxFAIL_MSG( _T("out of memory in wxStringBase::operator=(const wxChar *)") ); - } - return *this; + return m_impl.compare(ImplStr(sz)); } -// helper function: does real copy -bool wxStringBase::AssignCopy(size_t nSrcLen, const wxChar *pszSrcData) +int wxString::compare(size_t nStart, size_t nLen, + const char* sz, size_t nCount) 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'); - } - 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; + size_t pos, len; + PosLenToImpl(nStart, nLen, &pos, &len); - // concatenating an empty string is a NOP - if ( nSrcLen > 0 ) { - wxStringData *pData = GetStringData(); - size_t nLen = pData->nDataLength; - size_t nNewLen = nLen + nSrcLen; + SubstrBufFromMB str(ImplStr(sz, nCount)); - // 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(); - } - else if ( nNewLen > pData->nAllocLength ) { - STATISTICS_ADD(ConcatHit, 0); - - reserve(nNewLen); - // we have to grow the buffer - if ( capacity() < nNewLen ) { - // allocation failure handled by caller - return false; - } - } - else { - STATISTICS_ADD(ConcatHit, 1); - - // the buffer is already big enough - } - - // should be enough space - wxASSERT( nNewLen <= GetStringData()->nAllocLength ); - - // 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; + return m_impl.compare(pos, len, str.data, str.len); } -// --------------------------------------------------------------------------- -// simple sub-string extraction -// --------------------------------------------------------------------------- - -// helper function: clone the data attached to this string -bool wxStringBase::AllocCopy(wxString& dest, int nCopyLen, int nCopyIndex) const +int wxString::compare(size_t nStart, size_t nLen, + const wchar_t* sz, size_t nCount) 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; -} + size_t pos, len; + PosLenToImpl(nStart, nLen, &pos, &len); -#endif // !wxUSE_STL + SubstrBufFromWC str(ImplStr(sz, nCount)); -#if !wxUSE_STL || !defined(HAVE_STD_STRING_COMPARE) + return m_impl.compare(pos, len, str.data, str.len); +} -#if !wxUSE_STL - #define STRINGCLASS wxStringBase -#else - #define STRINGCLASS wxString -#endif +#else // !HAVE_STD_STRING_COMPARE -static inline int wxDoCmp(const wxChar* s1, size_t l1, - const wxChar* s2, size_t l2) +static inline int wxDoCmp(const wxStringCharType* s1, size_t l1, + const wxStringCharType* s2, size_t l2) { if( l1 == l2 ) - return wxTmemcmp(s1, s2, l1); + return wxStringMemcmp(s1, s2, l1); else if( l1 < l2 ) { - int ret = wxTmemcmp(s1, s2, l1); + int ret = wxStringMemcmp(s1, s2, l1); return ret == 0 ? -1 : ret; } else { - int ret = wxTmemcmp(s1, s2, l2); + int ret = wxStringMemcmp(s1, s2, l2); return ret == 0 ? +1 : ret; } } -int STRINGCLASS::compare(const wxStringBase& str) const +int wxString::compare(const wxString& str) const { - return ::wxDoCmp(data(), length(), str.data(), str.length()); + return ::wxDoCmp(m_impl.data(), m_impl.length(), + str.m_impl.data(), str.m_impl.length()); } -int STRINGCLASS::compare(size_t nStart, size_t nLen, - const wxStringBase& str) const +int wxString::compare(size_t nStart, size_t nLen, + const wxString& str) const { wxASSERT(nStart <= length()); size_type strLen = length() - nStart; nLen = strLen < nLen ? strLen : nLen; - return ::wxDoCmp(data() + nStart, nLen, str.data(), str.length()); + + size_t pos, len; + PosLenToImpl(nStart, nLen, &pos, &len); + + return ::wxDoCmp(m_impl.data() + pos, len, + str.m_impl.data(), str.m_impl.length()); } -int STRINGCLASS::compare(size_t nStart, size_t nLen, - const wxStringBase& str, - size_t nStart2, size_t nLen2) const +int wxString::compare(size_t nStart, size_t nLen, + const wxString& str, + size_t nStart2, size_t nLen2) const { wxASSERT(nStart <= length()); wxASSERT(nStart2 <= str.length()); @@ -953,301 +830,316 @@ int STRINGCLASS::compare(size_t nStart, size_t nLen, 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 + size_t pos, len; + PosLenToImpl(nStart, nLen, &pos, &len); + size_t pos2, len2; + str.PosLenToImpl(nStart2, nLen2, &pos2, &len2); -// 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); - } + return ::wxDoCmp(m_impl.data() + pos, len, + str.m_impl.data() + pos2, len2); } -//Convert wxString in Unicode mode to a multi-byte string -const wxCharBuffer wxString::mb_str(const wxMBConv& conv) const +int wxString::compare(const char* sz) const { - return conv.cWC2MB(c_str(), length() + 1 /* size, not length */, NULL); + SubstrBufFromMB str(ImplStr(sz, npos)); + if ( str.len == npos ) + str.len = wxStringStrlen(str.data); + return ::wxDoCmp(m_impl.data(), m_impl.length(), str.data, str.len); } -#else // ANSI - -#if wxUSE_WCHAR_T - -// from wide string -wxString::wxString(const wchar_t *pwz, const wxMBConv& conv, size_t nLength) +int wxString::compare(const wchar_t* sz) const { - // 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); - } + SubstrBufFromWC str(ImplStr(sz, npos)); + if ( str.len == npos ) + str.len = wxStringStrlen(str.data); + return ::wxDoCmp(m_impl.data(), m_impl.length(), str.data, str.len); } -//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 +int wxString::compare(size_t nStart, size_t nLen, + const char* sz, size_t nCount) const { - return conv.cMB2WC(c_str(), length() + 1 /* size, not length */, NULL); -} + wxASSERT(nStart <= length()); + size_type strLen = length() - nStart; + nLen = strLen < nLen ? strLen : nLen; -#endif // wxUSE_WCHAR_T + size_t pos, len; + PosLenToImpl(nStart, nLen, &pos, &len); -#endif // Unicode/ANSI + SubstrBufFromMB str(ImplStr(sz, nCount)); + if ( str.len == npos ) + str.len = wxStringStrlen(str.data); -// shrink to minimal size (releasing extra memory) -bool wxString::Shrink() -{ - wxString tmp(begin(), end()); - swap(tmp); - return tmp.length() == length(); + return ::wxDoCmp(m_impl.data() + pos, len, str.data, str.len); } -#if !wxUSE_STL -// get the pointer to writable buffer of (at least) nLen bytes -wxChar *wxString::GetWriteBuf(size_t nLen) +int wxString::compare(size_t nStart, size_t nLen, + const wchar_t* sz, size_t nCount) const { - if ( !AllocBeforeWrite(nLen) ) { - // allocation failure handled by caller - return NULL; - } - - wxASSERT( GetStringData()->nRefs == 1 ); - GetStringData()->Validate(false); - - return m_pchData; -} + wxASSERT(nStart <= length()); + size_type strLen = length() - nStart; + nLen = strLen < nLen ? strLen : nLen; -// put string back in a reasonable state after GetWriteBuf -void wxString::UngetWriteBuf() -{ - GetStringData()->nDataLength = wxStrlen(m_pchData); - GetStringData()->Validate(true); -} + size_t pos, len; + PosLenToImpl(nStart, nLen, &pos, &len); -void wxString::UngetWriteBuf(size_t nLen) -{ - GetStringData()->nDataLength = nLen; - GetStringData()->Validate(true); + SubstrBufFromWC str(ImplStr(sz, nCount)); + if ( str.len == npos ) + str.len = wxStringStrlen(str.data); + + return ::wxDoCmp(m_impl.data() + pos, len, str.data, str.len); } -#endif -// --------------------------------------------------------------------------- -// data access -// --------------------------------------------------------------------------- +#endif // HAVE_STD_STRING_COMPARE/!HAVE_STD_STRING_COMPARE -// all functions are inline in string.h // --------------------------------------------------------------------------- -// assignment operators +// find_{first,last}_[not]_of functions // --------------------------------------------------------------------------- -#if !wxUSE_UNICODE +#if !wxUSE_STL_BASED_WXSTRING || wxUSE_UNICODE_UTF8 -// same as 'signed char' variant -wxString& wxString::operator=(const unsigned char* psz) +// NB: All these functions are implemented with the argument being wxChar*, +// i.e. widechar string in any Unicode build, even though native string +// representation is char* in the UTF-8 build. This is because we couldn't +// use memchr() to determine if a character is in a set encoded as UTF-8. + +size_t wxString::find_first_of(const wxChar* sz, size_t nStart) const { - *this = (const char *)psz; - return *this; + return find_first_of(sz, nStart, wxStrlen(sz)); } -#if wxUSE_WCHAR_T -wxString& wxString::operator=(const wchar_t *pwz) +size_t wxString::find_first_not_of(const wxChar* sz, size_t nStart) const { - wxString str(pwz); - swap(str); - return *this; + return find_first_not_of(sz, nStart, wxStrlen(sz)); } -#endif - -#endif - -/* - * concatenation functions come in 5 flavours: - * string + string - * char + string and string + char - * C str + string and string + C str - */ -wxString operator+(const wxString& str1, const wxString& str2) +size_t wxString::find_first_of(const wxChar* sz, size_t nStart, size_t n) const { -#if !wxUSE_STL - wxASSERT( str1.GetStringData()->IsValid() ); - wxASSERT( str2.GetStringData()->IsValid() ); -#endif + wxASSERT_MSG( nStart <= length(), wxT("invalid index") ); - wxString s = str1; - s += str2; + size_t idx = nStart; + for ( const_iterator i = begin() + nStart; i != end(); ++idx, ++i ) + { + if ( wxTmemchr(sz, *i, n) ) + return idx; + } - return s; + return npos; } -wxString operator+(const wxString& str, wxChar ch) +size_t wxString::find_first_not_of(const wxChar* sz, size_t nStart, size_t n) const { -#if !wxUSE_STL - wxASSERT( str.GetStringData()->IsValid() ); -#endif + wxASSERT_MSG( nStart <= length(), wxT("invalid index") ); - wxString s = str; - s += ch; + size_t idx = nStart; + for ( const_iterator i = begin() + nStart; i != end(); ++idx, ++i ) + { + if ( !wxTmemchr(sz, *i, n) ) + return idx; + } - return s; + return npos; } -wxString operator+(wxChar ch, const wxString& str) -{ -#if !wxUSE_STL - wxASSERT( str.GetStringData()->IsValid() ); -#endif - wxString s = ch; - s += str; +size_t wxString::find_last_of(const wxChar* sz, size_t nStart) const +{ + return find_last_of(sz, nStart, wxStrlen(sz)); +} - return s; +size_t wxString::find_last_not_of(const wxChar* sz, size_t nStart) const +{ + return find_last_not_of(sz, nStart, wxStrlen(sz)); } -wxString operator+(const wxString& str, const wxChar *psz) +size_t wxString::find_last_of(const wxChar* sz, size_t nStart, size_t n) const { -#if !wxUSE_STL - wxASSERT( str.GetStringData()->IsValid() ); -#endif + size_t len = length(); - wxString s; - if ( !s.Alloc(wxStrlen(psz) + str.length()) ) { - wxFAIL_MSG( _T("out of memory in wxString::operator+") ); + if ( nStart == npos ) + { + nStart = len - 1; + } + else + { + wxASSERT_MSG( nStart <= len, wxT("invalid index") ); } - s += str; - s += psz; - return s; + size_t idx = nStart; + for ( const_reverse_iterator i = rbegin() + (len - nStart - 1); + i != rend(); --idx, ++i ) + { + if ( wxTmemchr(sz, *i, n) ) + return idx; + } + + return npos; } -wxString operator+(const wxChar *psz, const wxString& str) +size_t wxString::find_last_not_of(const wxChar* sz, size_t nStart, size_t n) const { -#if !wxUSE_STL - wxASSERT( str.GetStringData()->IsValid() ); -#endif + size_t len = length(); - wxString s; - if ( !s.Alloc(wxStrlen(psz) + str.length()) ) { - wxFAIL_MSG( _T("out of memory in wxString::operator+") ); + if ( nStart == npos ) + { + nStart = len - 1; + } + else + { + wxASSERT_MSG( nStart <= len, wxT("invalid index") ); } - s = psz; - s += str; - - return s; -} -// =========================================================================== -// other common string functions -// =========================================================================== + size_t idx = nStart; + for ( const_reverse_iterator i = rbegin() + (len - nStart - 1); + i != rend(); --idx, ++i ) + { + if ( !wxTmemchr(sz, *i, n) ) + return idx; + } -int wxString::Cmp(const wxString& s) const -{ - return compare(s); + return npos; } -int wxString::Cmp(const wxChar* psz) const +size_t wxString::find_first_not_of(wxUniChar ch, size_t nStart) const { - return compare(psz); + wxASSERT_MSG( nStart <= length(), wxT("invalid index") ); + + size_t idx = nStart; + for ( const_iterator i = begin() + nStart; i != end(); ++idx, ++i ) + { + if ( *i != ch ) + return idx; + } + + return npos; } -static inline int wxDoCmpNoCase(const wxChar* s1, size_t l1, - const wxChar* s2, size_t l2) +size_t wxString::find_last_not_of(wxUniChar ch, size_t nStart) const { - size_t i; + size_t len = length(); - if( l1 == l2 ) + if ( nStart == npos ) { - 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; + nStart = len - 1; } - else if( l1 < l2 ) + else { - 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; + wxASSERT_MSG( nStart <= len, wxT("invalid index") ); } - else + + size_t idx = nStart; + for ( const_reverse_iterator i = rbegin() + (len - nStart - 1); + i != rend(); --idx, ++i ) { - 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; + if ( *i != ch ) + return idx; } + + return npos; } +// the functions above were implemented for wchar_t* arguments in Unicode +// build and char* in ANSI build; below are implementations for the other +// version: +#if wxUSE_UNICODE + #define wxOtherCharType char + #define STRCONV (const wxChar*)wxConvLibc.cMB2WC +#else + #define wxOtherCharType wchar_t + #define STRCONV (const wxChar*)wxConvLibc.cWC2MB +#endif + +size_t wxString::find_first_of(const wxOtherCharType* sz, size_t nStart) const + { return find_first_of(STRCONV(sz), nStart); } + +size_t wxString::find_first_of(const wxOtherCharType* sz, size_t nStart, + size_t n) const + { return find_first_of(STRCONV(sz, n, NULL), nStart, n); } +size_t wxString::find_last_of(const wxOtherCharType* sz, size_t nStart) const + { return find_last_of(STRCONV(sz), nStart); } +size_t wxString::find_last_of(const wxOtherCharType* sz, size_t nStart, + size_t n) const + { return find_last_of(STRCONV(sz, n, NULL), nStart, n); } +size_t wxString::find_first_not_of(const wxOtherCharType* sz, size_t nStart) const + { return find_first_not_of(STRCONV(sz), nStart); } +size_t wxString::find_first_not_of(const wxOtherCharType* sz, size_t nStart, + size_t n) const + { return find_first_not_of(STRCONV(sz, n, NULL), nStart, n); } +size_t wxString::find_last_not_of(const wxOtherCharType* sz, size_t nStart) const + { return find_last_not_of(STRCONV(sz), nStart); } +size_t wxString::find_last_not_of(const wxOtherCharType* sz, size_t nStart, + size_t n) const + { return find_last_not_of(STRCONV(sz, n, NULL), nStart, n); } + +#undef wxOtherCharType +#undef STRCONV + +#endif // !wxUSE_STL_BASED_WXSTRING || wxUSE_UNICODE_UTF8 + +// =========================================================================== +// other common string functions +// =========================================================================== + int wxString::CmpNoCase(const wxString& s) const { - return wxDoCmpNoCase(data(), length(), s.data(), s.length()); -} +#if defined(__WXMSW__) && !wxUSE_UNICODE_UTF8 + // Prefer to use CompareString() if available as it's more efficient than + // doing it manually or even using wxStricmp() (see #10375) + // + // Also note that not using NORM_STRINGSORT may result in not having a + // strict weak ordering (e.g. s1 < s2 and s2 < s3 but s3 < s1) and so break + // algorithms such as std::sort that rely on it. It's also more consistent + // with the fall back version below. + switch ( ::CompareString(LOCALE_USER_DEFAULT, + NORM_IGNORECASE | SORT_STRINGSORT, + m_impl.c_str(), m_impl.length(), + s.m_impl.c_str(), s.m_impl.length()) ) + { + case CSTR_LESS_THAN: + return -1; -int wxString::CmpNoCase(const wxChar* psz) const -{ - int nLen = wxStrlen(psz); + case CSTR_EQUAL: + return 0; + + case CSTR_GREATER_THAN: + return 1; + + default: + wxFAIL_MSG( "unexpected CompareString() return value" ); + // fall through + + case 0: + wxLogLastError("CompareString"); + // use generic code below + } +#endif // __WXMSW__ && !wxUSE_UNICODE_UTF8 + + // do the comparison manually: notice that we can't use wxStricmp() as it + // doesn't handle embedded NULs + + // FIXME-UTF8: use wxUniChar::ToLower/ToUpper once added + const_iterator i1 = begin(); + const_iterator end1 = end(); + const_iterator i2 = s.begin(); + const_iterator end2 = s.end(); + + for ( ; i1 != end1 && i2 != end2; ++i1, ++i2 ) + { + wxUniChar lower1 = (wxChar)wxTolower(*i1); + wxUniChar lower2 = (wxChar)wxTolower(*i2); + if ( lower1 != lower2 ) + return lower1 < lower2 ? -1 : 1; + } - return wxDoCmpNoCase(data(), length(), psz, nLen); + size_t len1 = length(); + size_t len2 = s.length(); + + if ( len1 < len2 ) + return -1; + else if ( len1 > len2 ) + return 1; + return 0; } @@ -1259,63 +1151,69 @@ int wxString::CmpNoCase(const wxChar* psz) const #endif #endif -wxString wxString::FromAscii(const char *ascii) +wxString wxString::FromAscii(const char *ascii, size_t len) { - if (!ascii) + if (!ascii || len == 0) return wxEmptyString; - size_t len = strlen( ascii ); wxString res; - if ( len ) { - wxStringBuffer buf(res, len); + wxStringInternalBuffer buf(res, len); + wxStringCharType *dest = buf; - wchar_t *dest = buf; - - for ( ;; ) + for ( ; len > 0; --len ) { - if ( (*dest++ = (wchar_t)(unsigned char)*ascii++) == L'\0' ) - break; + unsigned char c = (unsigned char)*ascii++; + wxASSERT_MSG( c < 0x80, + wxT("Non-ASCII value passed to FromAscii().") ); + + *dest++ = (wchar_t)c; } } return res; } -wxString wxString::FromAscii(const char ascii) +wxString wxString::FromAscii(const char *ascii) +{ + return FromAscii(ascii, wxStrlen(ascii)); +} + +wxString wxString::FromAscii(char ascii) { // What do we do with '\0' ? - wxString res; - res += (wchar_t)(unsigned char) ascii; + unsigned char c = (unsigned char)ascii; - return res; + wxASSERT_MSG( c < 0x80, wxT("Non-ASCII value passed to FromAscii().") ); + + // NB: the cast to wchar_t causes interpretation of 'ascii' as Latin1 value + return wxString(wxUniChar((wchar_t)c)); } -const wxCharBuffer wxString::ToAscii() const +const wxScopedCharBuffer wxString::ToAscii() const { // this will allocate enough space for the terminating NUL too wxCharBuffer buffer(length()); - - char *dest = buffer.data(); - const wchar_t *pwc = c_str(); - for ( ;; ) + for ( const_iterator i = begin(); i != end(); ++i ) { - *dest++ = (char)(*pwc > SCHAR_MAX ? wxT('_') : *pwc); + wxUniChar c(*i); + // FIXME-UTF8: unify substituted char ('_') with wxUniChar ('?') + *dest++ = c.IsAscii() ? (char)c : '_'; // the output string can't have embedded NULs anyhow, so we can safely // stop at first of them even if we do have any - if ( !*pwc++ ) + if ( !c ) break; } return buffer; } -#endif // Unicode +#endif // wxUSE_UNICODE // extract string of length nCount starting at nFirst wxString wxString::Mid(size_t nFirst, size_t nCount) const @@ -1343,7 +1241,7 @@ wxString wxString::Mid(size_t nFirst, size_t nCount) const wxString dest(*this, nFirst, nCount); if ( dest.length() != nCount ) { - wxFAIL_MSG( _T("out of memory in wxString::Mid") ); + wxFAIL_MSG( wxT("out of memory in wxString::Mid") ); } return dest; @@ -1351,28 +1249,15 @@ wxString wxString::Mid(size_t nFirst, size_t nCount) const // 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 +bool wxString::StartsWith(const wxString& prefix, wxString *rest) const { - wxASSERT_MSG( prefix, _T("invalid parameter in wxString::StartsWith") ); - - // first check if the beginning of the string matches the prefix: note - // that we don't have to check that we don't run out of this string as - // when we reach the terminating NUL, either prefix string ends too (and - // then it's ok) or we break out of the loop because there is no match - const wxChar *p = c_str(); - while ( *prefix ) - { - if ( *prefix++ != *p++ ) - { - // no match - return false; - } - } + if ( compare(0, prefix.length(), prefix) != 0 ) + return false; if ( rest ) { // put the rest of the string into provided pointer - *rest = p; + rest->assign(*this, prefix.length(), npos); } return true; @@ -1381,12 +1266,11 @@ bool wxString::StartsWith(const wxChar *prefix, wxString *rest) const // 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 +bool wxString::EndsWith(const wxString& suffix, wxString *rest) const { - wxASSERT_MSG( suffix, _T("invalid parameter in wxString::EndssWith") ); + int start = length() - suffix.length(); - int start = length() - wxStrlen(suffix); - if ( start < 0 || wxStrcmp(c_str() + start, suffix) != 0 ) + if ( start < 0 || compare(start, npos, suffix) != 0 ) return false; if ( rest ) @@ -1407,21 +1291,21 @@ wxString wxString::Right(size_t nCount) const wxString dest(*this, length() - nCount, nCount); if ( dest.length() != nCount ) { - wxFAIL_MSG( _T("out of memory in wxString::Right") ); + wxFAIL_MSG( wxT("out of memory in wxString::Right") ); } return dest; } -// get all characters after the last occurence of ch +// get all characters after the last occurrence of ch // (returns the whole string if ch not found) -wxString wxString::AfterLast(wxChar ch) const +wxString wxString::AfterLast(wxUniChar ch) const { wxString str; int iPos = Find(ch, true); if ( iPos == wxNOT_FOUND ) str = *this; else - str = c_str() + iPos + 1; + str.assign(*this, iPos + 1, npos); return str; } @@ -1434,23 +1318,24 @@ wxString wxString::Left(size_t nCount) const wxString dest(*this, 0, nCount); if ( dest.length() != nCount ) { - wxFAIL_MSG( _T("out of memory in wxString::Left") ); + wxFAIL_MSG( wxT("out of memory in wxString::Left") ); } return dest; } -// get all characters before the first occurence of ch +// get all characters before the first occurrence of ch // (returns the whole string if ch not found) -wxString wxString::BeforeFirst(wxChar ch) const +wxString wxString::BeforeFirst(wxUniChar ch) const { int iPos = Find(ch); - if ( iPos == wxNOT_FOUND ) iPos = length(); + if ( iPos == wxNOT_FOUND ) + iPos = length(); return wxString(*this, 0, iPos); } -/// get all characters before the last occurence of ch +/// get all characters before the last occurrence of ch /// (returns empty string if ch not found) -wxString wxString::BeforeLast(wxChar ch) const +wxString wxString::BeforeLast(wxUniChar ch) const { wxString str; int iPos = Find(ch, true); @@ -1460,56 +1345,112 @@ wxString wxString::BeforeLast(wxChar ch) const return str; } -/// get all characters after the first occurence of ch +/// get all characters after the first occurrence of ch /// (returns empty string if ch not found) -wxString wxString::AfterFirst(wxChar ch) const +wxString wxString::AfterFirst(wxUniChar ch) const { wxString str; int iPos = Find(ch); if ( iPos != wxNOT_FOUND ) - str = c_str() + iPos + 1; + str.assign(*this, iPos + 1, npos); return str; } -// replace first (or all) occurences of some substring with another one -size_t wxString::Replace(const wxChar *szOld, - const wxChar *szNew, bool bReplaceAll) +// replace first (or all) occurrences of some substring with another one +size_t wxString::Replace(const wxString& strOld, + const wxString& strNew, 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") ); + wxCHECK_MSG( !strOld.empty(), 0, + wxT("wxString::Replace(): invalid parameter") ); + + wxSTRING_INVALIDATE_CACHE(); size_t uiCount = 0; // count of replacements made - size_t uiOldLen = wxStrlen(szOld); - size_t uiNewLen = wxStrlen(szNew); + // optimize the special common case: replacement of one character by + // another one (in UTF-8 case we can only do this for ASCII characters) + // + // benchmarks show that this special version is around 3 times faster + // (depending on the proportion of matching characters and UTF-8/wchar_t + // build) + if ( strOld.m_impl.length() == 1 && strNew.m_impl.length() == 1 ) + { + const wxStringCharType chOld = strOld.m_impl[0], + chNew = strNew.m_impl[0]; + + // this loop is the simplified version of the one below + for ( size_t pos = 0; ; ) + { + pos = m_impl.find(chOld, pos); + if ( pos == npos ) + break; + + m_impl[pos++] = chNew; - size_t dwPos = 0; + uiCount++; - while ( this->c_str()[dwPos] != wxT('\0') ) + if ( !bReplaceAll ) + break; + } + } + else if ( !bReplaceAll) { - //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 + size_t pos = m_impl.find(strOld, 0); + if ( pos != npos ) { - //replace this occurance of the old string with the new one - replace(dwPos, uiOldLen, szNew, uiNewLen); + m_impl.replace(pos, strOld.m_impl.length(), strNew.m_impl); + uiCount = 1; + } + } + else // replace all occurrences + { + const size_t uiOldLen = strOld.m_impl.length(); + const size_t uiNewLen = strNew.m_impl.length(); - //move up pos past the string that was replaced - dwPos += uiNewLen; + // first scan the string to find all positions at which the replacement + // should be made + wxVector replacePositions; - //increase replace count + size_t pos; + for ( pos = m_impl.find(strOld.m_impl, 0); + pos != npos; + pos = m_impl.find(strOld.m_impl, pos + uiOldLen)) + { + replacePositions.push_back(pos); ++uiCount; + } - // stop now? - if ( !bReplaceAll ) - break; // exit the loop + if ( !uiCount ) + return 0; + + // allocate enough memory for the whole new string + wxString tmp; + tmp.m_impl.reserve(m_impl.length() + uiCount*(uiNewLen - uiOldLen)); + + // copy this string to tmp doing replacements on the fly + size_t replNum = 0; + for ( pos = 0; replNum < uiCount; replNum++ ) + { + const size_t nextReplPos = replacePositions[replNum]; + + if ( pos != nextReplPos ) + { + tmp.m_impl.append(m_impl, pos, nextReplPos - pos); + } + + tmp.m_impl.append(strNew.m_impl); + pos = nextReplPos + uiOldLen; + } + + if ( pos != m_impl.length() ) + { + // append the rest of the string unchanged + tmp.m_impl.append(m_impl, pos, m_impl.length() - pos); } + + swap(tmp); } return uiCount; @@ -1517,34 +1458,43 @@ size_t wxString::Replace(const wxChar *szOld, bool wxString::IsAscii() const { - const wxChar *s = (const wxChar*) *this; - while(*s){ - if(!isascii(*s)) return(false); - s++; - } - return(true); + for ( const_iterator i = begin(); i != end(); ++i ) + { + if ( !(*i).IsAscii() ) + return false; + } + + return true; } bool wxString::IsWord() const { - const wxChar *s = (const wxChar*) *this; - while(*s){ - if(!wxIsalpha(*s)) return(false); - s++; - } - return(true); + for ( const_iterator i = begin(); i != end(); ++i ) + { + if ( !wxIsalpha(*i) ) + return false; + } + + return true; } bool wxString::IsNumber() const { - const wxChar *s = (const wxChar*) *this; - if (wxStrlen(s)) - if ((s[0] == wxT('-')) || (s[0] == wxT('+'))) s++; - while(*s){ - if(!wxIsdigit(*s)) return(false); - s++; - } - return(true); + if ( empty() ) + return true; + + const_iterator i = begin(); + + if ( *i == wxT('-') || *i == wxT('+') ) + ++i; + + for ( ; i != end(); ++i ) + { + if ( !wxIsdigit(*i) ) + return false; + } + + return true; } wxString wxString::Strip(stripType w) const @@ -1575,14 +1525,28 @@ wxString& wxString::MakeLower() return *this; } +wxString& wxString::MakeCapitalized() +{ + const iterator en = end(); + iterator it = begin(); + if ( it != en ) + { + *it = (wxChar)wxToupper(*it); + for ( ++it; it != en; ++it ) + *it = (wxChar)wxTolower(*it); + } + + return *this; +} + // --------------------------------------------------------------------------- // trimming and padding // --------------------------------------------------------------------------- // 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 +// isspace('\xEA') 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 // space-like symbols somewhere except in the first 128 chars), it is arguably // still better than trimming away accented letters inline int wxSafeIsspace(wxChar ch) { return (ch < 127) && wxIsspace(ch); } @@ -1603,8 +1567,8 @@ wxString& wxString::Trim(bool bFromRight) // find last non-space character reverse_iterator psz = rbegin(); while ( (psz != rend()) && wxSafeIsspace(*psz) ) - psz++; - + ++psz; + // truncate at trailing space start erase(psz.base(), end()); } @@ -1613,7 +1577,7 @@ wxString& wxString::Trim(bool bFromRight) // find first non-space character iterator psz = begin(); while ( (psz != end()) && wxSafeIsspace(*psz) ) - psz++; + ++psz; // fix up data and length erase(begin(), psz); @@ -1624,7 +1588,7 @@ wxString& wxString::Trim(bool bFromRight) } // adds nCount characters chPad to the string from either side -wxString& wxString::Pad(size_t nCount, wxChar chPad, bool bFromRight) +wxString& wxString::Pad(size_t nCount, wxUniChar chPad, bool bFromRight) { wxString s(chPad, nCount); @@ -1656,167 +1620,379 @@ wxString& wxString::Truncate(size_t uiLen) // --------------------------------------------------------------------------- // find a character -int wxString::Find(wxChar ch, bool bFromEnd) const +int wxString::Find(wxUniChar ch, bool bFromEnd) const { size_type idx = bFromEnd ? find_last_of(ch) : find_first_of(ch); return (idx == npos) ? wxNOT_FOUND : (int)idx; } -// find a sub-string (like strstr) -int wxString::Find(const wxChar *pszSub) const -{ - size_type idx = find(pszSub); - - return (idx == npos) ? wxNOT_FOUND : (int)idx; -} - // ---------------------------------------------------------------------------- // conversion to numbers // ---------------------------------------------------------------------------- -// the implementation of all the functions below is exactly the same so factor -// it out -#ifndef __WATCOMC__ +// The implementation of all the functions below is exactly the same so factor +// it out. Note that number extraction works correctly on UTF-8 strings, so +// we can use wxStringCharType and wx_str() for maximum efficiency. + +#ifndef __WXWINCE__ + #define DO_IF_NOT_WINCE(x) x +#else + #define DO_IF_NOT_WINCE(x) +#endif + +#define WX_STRING_TO_X_TYPE_START \ + wxCHECK_MSG( pVal, false, wxT("NULL output pointer") ); \ + DO_IF_NOT_WINCE( errno = 0; ) \ + const wxStringCharType *start = wx_str(); \ + wxStringCharType *end; + +// notice that we return false without modifying the output parameter at all if +// nothing could be parsed but we do modify it and return false then if we did +// parse something successfully but not the entire string +#define WX_STRING_TO_X_TYPE_END \ + if ( end == start DO_IF_NOT_WINCE(|| errno == ERANGE) ) \ + return false; \ + *pVal = val; \ + return !*end; -template -bool wxStringToIntType(const wxChar *start, - T *val, - int base, - T (*func)(const wxChar *, wxChar **, int)) +bool wxString::ToLong(long *pVal, int base) const { - wxCHECK_MSG( val, false, _T("NULL output pointer") ); - wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") ); + wxASSERT_MSG( !base || (base > 1 && base <= 36), wxT("invalid base") ); - errno = 0; + WX_STRING_TO_X_TYPE_START + long val = wxStrtol(start, &end, base); + WX_STRING_TO_X_TYPE_END +} - wxChar *end; - *val = (*func)(start, &end, base); +bool wxString::ToULong(unsigned long *pVal, int base) const +{ + wxASSERT_MSG( !base || (base > 1 && base <= 36), wxT("invalid base") ); - // return true only if scan was stopped by the terminating NUL and if the - // string was not empty to start with and no under/overflow occurred - return !*end && (end != start) && (errno != ERANGE); + WX_STRING_TO_X_TYPE_START + unsigned long val = wxStrtoul(start, &end, base); + WX_STRING_TO_X_TYPE_END } -#define wxSTR2INT(val, b, func) return wxStringToIntType(c_str(), val, b, func) +bool wxString::ToLongLong(wxLongLong_t *pVal, int base) const +{ + wxASSERT_MSG( !base || (base > 1 && base <= 36), wxT("invalid base") ); + + WX_STRING_TO_X_TYPE_START + wxLongLong_t val = wxStrtoll(start, &end, base); + WX_STRING_TO_X_TYPE_END +} -#else // __WATCOMC__ +bool wxString::ToULongLong(wxULongLong_t *pVal, int base) const +{ + wxASSERT_MSG( !base || (base > 1 && base <= 36), wxT("invalid base") ); -// FIXME, TODO, ASAP !!! - ugly trick to make release for Open Watcom possible -// without changing code flow for other compilers + WX_STRING_TO_X_TYPE_START + wxULongLong_t val = wxStrtoull(start, &end, base); + WX_STRING_TO_X_TYPE_END +} -#define wxSTR2INT(val, base, func) \ - wxCHECK_MSG( val, false, _T("NULL output pointer") ); \ - wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") ); \ - \ - errno = 0; \ - \ - wxChar *end; \ - *val = (*func)(c_str(), &end, base); \ - \ - return !*end && (end != c_str()) && (errno != ERANGE) +bool wxString::ToDouble(double *pVal) const +{ + WX_STRING_TO_X_TYPE_START + double val = wxStrtod(start, &end); + WX_STRING_TO_X_TYPE_END +} -#endif // !__WATCOMC__/__WATCOMC__ +#if wxUSE_XLOCALE -bool wxString::ToLong(long *val, int base) const +bool wxString::ToCLong(long *pVal, int base) const { - wxSTR2INT(val, base, wxStrtol); + wxASSERT_MSG( !base || (base > 1 && base <= 36), wxT("invalid base") ); + + WX_STRING_TO_X_TYPE_START +#if (wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE) && defined(wxHAS_XLOCALE_SUPPORT) + long val = wxStrtol_lA(start, &end, base, wxCLocale); +#else + long val = wxStrtol_l(start, &end, base, wxCLocale); +#endif + WX_STRING_TO_X_TYPE_END } -bool wxString::ToULong(unsigned long *val, int base) const +bool wxString::ToCULong(unsigned long *pVal, int base) const { - wxSTR2INT(val, base, wxStrtoul); + wxASSERT_MSG( !base || (base > 1 && base <= 36), wxT("invalid base") ); + + WX_STRING_TO_X_TYPE_START +#if (wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE) && defined(wxHAS_XLOCALE_SUPPORT) + unsigned long val = wxStrtoul_lA(start, &end, base, wxCLocale); +#else + unsigned long val = wxStrtoul_l(start, &end, base, wxCLocale); +#endif + WX_STRING_TO_X_TYPE_END } -bool wxString::ToLongLong(wxLongLong_t *val, int base) const +bool wxString::ToCDouble(double *pVal) const { -#ifdef wxHAS_STRTOLL - wxSTR2INT(val, base, wxStrtoll); + WX_STRING_TO_X_TYPE_START +#if (wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE) && defined(wxHAS_XLOCALE_SUPPORT) + double val = wxStrtod_lA(start, &end, wxCLocale); #else - // TODO: implement this ourselves - wxUnusedVar(val); - wxUnusedVar(base); - return false; -#endif // wxHAS_STRTOLL + double val = wxStrtod_l(start, &end, wxCLocale); +#endif + WX_STRING_TO_X_TYPE_END +} + +#else // wxUSE_XLOCALE + +// Provide implementation of these functions even when wxUSE_XLOCALE is +// disabled, we still need them in wxWidgets internal code. + +// For integers we just assume the current locale uses the same number +// representation as the C one as there is nothing else we can do. +bool wxString::ToCLong(long *pVal, int base) const +{ + return ToLong(pVal, base); +} + +bool wxString::ToCULong(unsigned long *pVal, int base) const +{ + return ToULong(pVal, base); +} + +// For floating point numbers we have to handle the problem of the decimal +// point which is different in different locales. +bool wxString::ToCDouble(double *pVal) const +{ + // Create a copy of this string using the decimal point instead of whatever + // separator the current locale uses. +#if wxUSE_INTL + wxString sep = wxLocale::GetInfo(wxLOCALE_DECIMAL_POINT, + wxLOCALE_CAT_NUMBER); + if ( sep == "." ) + { + // We can avoid an unnecessary string copy in this case. + return ToDouble(pVal); + } +#else // !wxUSE_INTL + // We don't know what the current separator is so it might even be a point + // already, try to parse the string as a double: + if ( ToDouble(pVal) ) + { + // It must have been the point, nothing else to do. + return true; + } + + // Try to guess the separator, using the most common alternative value. + wxString sep(","); +#endif // wxUSE_INTL/!wxUSE_INTL + wxString cstr(*this); + cstr.Replace(".", sep); + + return cstr.ToDouble(pVal); +} + +#endif // wxUSE_XLOCALE/!wxUSE_XLOCALE + +// ---------------------------------------------------------------------------- +// number to string conversion +// ---------------------------------------------------------------------------- + +/* static */ +wxString wxString::FromCDouble(double val) +{ +#if wxUSE_STD_IOSTREAM && wxUSE_STD_STRING + // We assume that we can use the ostream and not wstream for numbers. + wxSTD ostringstream os; + os << val; + return os.str(); +#else // wxUSE_STD_IOSTREAM + // Can't use iostream locale support, fall back to the manual method + // instead. + wxString s = FromDouble(val); +#if wxUSE_INTL + wxString sep = wxLocale::GetInfo(wxLOCALE_DECIMAL_POINT, + wxLOCALE_CAT_NUMBER); +#else // !wxUSE_INTL + // As above, this is the most common alternative value. Notice that here it + // doesn't matter if we guess wrongly and the current separator is already + // ".": we'll just waste a call to Replace() in this case. + wxString sep(","); +#endif // wxUSE_INTL/!wxUSE_INTL + + s.Replace(sep, "."); + return s; +#endif // wxUSE_STD_IOSTREAM/!wxUSE_STD_IOSTREAM } -bool wxString::ToULongLong(wxULongLong_t *val, int base) const -{ -#ifdef wxHAS_STRTOLL - wxSTR2INT(val, base, wxStrtoull); +// --------------------------------------------------------------------------- +// formatted output +// --------------------------------------------------------------------------- + +#if !wxUSE_UTF8_LOCALE_ONLY +/* static */ +#ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN +wxString wxStringPrintfMixinBase::DoFormatWchar(const wxChar *format, ...) #else - // TODO: implement this ourselves - wxUnusedVar(val); - wxUnusedVar(base); - return false; +wxString wxString::DoFormatWchar(const wxChar *format, ...) #endif -} - -bool wxString::ToDouble(double *val) const { - wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToDouble") ); + va_list argptr; + va_start(argptr, format); - errno = 0; + wxString s; + s.PrintfV(format, argptr); - const wxChar *start = c_str(); - wxChar *end; - *val = wxStrtod(start, &end); + va_end(argptr); - // return true only if scan was stopped by the terminating NUL and if the - // string was not empty to start with and no under/overflow occurred - return !*end && (end != start) && (errno != ERANGE); + return s; } +#endif // !wxUSE_UTF8_LOCALE_ONLY -// --------------------------------------------------------------------------- -// formatted output -// --------------------------------------------------------------------------- - +#if wxUSE_UNICODE_UTF8 /* static */ -wxString wxString::Format(const wxChar *pszFormat, ...) +wxString wxString::DoFormatUtf8(const char *format, ...) { va_list argptr; - va_start(argptr, pszFormat); + va_start(argptr, format); wxString s; - s.PrintfV(pszFormat, argptr); + s.PrintfV(format, argptr); va_end(argptr); return s; } +#endif // wxUSE_UNICODE_UTF8 /* static */ -wxString wxString::FormatV(const wxChar *pszFormat, va_list argptr) +wxString wxString::FormatV(const wxString& format, va_list argptr) { wxString s; - s.PrintfV(pszFormat, argptr); + s.PrintfV(format, argptr); return s; } -int wxString::Printf(const wxChar *pszFormat, ...) +#if !wxUSE_UTF8_LOCALE_ONLY +#ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN +int wxStringPrintfMixinBase::DoPrintfWchar(const wxChar *format, ...) +#else +int wxString::DoPrintfWchar(const wxChar *format, ...) +#endif +{ + va_list argptr; + va_start(argptr, format); + +#ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN + // get a pointer to the wxString instance; we have to use dynamic_cast<> + // because it's the only cast that works safely for downcasting when + // multiple inheritance is used: + wxString *str = static_cast(this); +#else + wxString *str = this; +#endif + + int iLen = str->PrintfV(format, argptr); + + va_end(argptr); + + return iLen; +} +#endif // !wxUSE_UTF8_LOCALE_ONLY + +#if wxUSE_UNICODE_UTF8 +int wxString::DoPrintfUtf8(const char *format, ...) { va_list argptr; - va_start(argptr, pszFormat); + va_start(argptr, format); - int iLen = PrintfV(pszFormat, argptr); + int iLen = PrintfV(format, argptr); va_end(argptr); return iLen; } +#endif // wxUSE_UNICODE_UTF8 -int wxString::PrintfV(const wxChar* pszFormat, va_list argptr) +/* + Uses wxVsnprintf and places the result into the this string. + + In ANSI build, wxVsnprintf is effectively vsnprintf but in Unicode build + it is vswprintf. Due to a discrepancy between vsnprintf and vswprintf in + the ISO C99 (and thus SUSv3) standard the return value for the case of + an undersized buffer is inconsistent. For conforming vsnprintf + implementations the function must return the number of characters that + would have been printed had the buffer been large enough. For conforming + vswprintf implementations the function must return a negative number + and set errno. + + What vswprintf sets errno to is undefined but Darwin seems to set it to + EOVERFLOW. The only expected errno are EILSEQ and EINVAL. Both of + those are defined in the standard and backed up by several conformance + statements. Note that ENOMEM mentioned in the manual page does not + apply to swprintf, only wprintf and fwprintf. + + Official manual page: + http://www.opengroup.org/onlinepubs/009695399/functions/swprintf.html + + Some conformance statements (AIX, Solaris): + http://www.opengroup.org/csq/view.mhtml?RID=ibm%2FSD1%2F3 + http://www.theopengroup.org/csq/view.mhtml?norationale=1&noreferences=1&RID=Fujitsu%2FSE2%2F10 + + Since EILSEQ and EINVAL are rather common but EOVERFLOW is not and since + EILSEQ and EINVAL are specifically defined to mean the error is other than + an undersized buffer and no other errno are defined we treat those two + as meaning hard errors and everything else gets the old behavior which + is to keep looping and increasing buffer size until the function succeeds. + + In practice it's impossible to determine before compilation which behavior + may be used. The vswprintf function may have vsnprintf-like behavior or + vice-versa. Behavior detected on one release can theoretically change + with an updated release. Not to mention that configure testing for it + would require the test to be run on the host system, not the build system + which makes cross compilation difficult. Therefore, we make no assumptions + about behavior and try our best to handle every known case, including the + case where wxVsnprintf returns a negative number and fails to set errno. + + There is yet one more non-standard implementation and that is our own. + Fortunately, that can be detected at compile-time. + + On top of all that, ISO C99 explicitly defines snprintf to write a null + character to the last position of the specified buffer. That would be at + at the given buffer size minus 1. It is supposed to do this even if it + turns out that the buffer is sized too small. + + Darwin (tested on 10.5) follows the C99 behavior exactly. + + Glibc 2.6 almost follows the C99 behavior except vswprintf never sets + errno even when it fails. However, it only seems to ever fail due + to an undersized buffer. +*/ +#if wxUSE_UNICODE_UTF8 +template +#else +// we only need one version in non-UTF8 builds and at least two Windows +// compilers have problems with this function template, so use just one +// normal function here +#endif +static int DoStringPrintfV(wxString& str, + const wxString& format, va_list argptr) { int size = 1024; for ( ;; ) { - wxStringBuffer tmp(*this, size + 1); +#if wxUSE_UNICODE_UTF8 + BufferType tmp(str, size + 1); + typename BufferType::CharType *buf = tmp; +#else + wxStringBuffer tmp(str, size + 1); wxChar *buf = tmp; +#endif if ( !buf ) { // out of memory + + // in UTF-8 build, leaving uninitialized junk in the buffer + // could result in invalid non-empty UTF-8 string, so just + // reset the string to empty on failure: + buf[0] = '\0'; return -1; } @@ -1824,28 +2000,69 @@ int wxString::PrintfV(const wxChar* pszFormat, va_list argptr) // only a copy va_list argptrcopy; wxVaCopy(argptrcopy, argptr); - int len = wxVsnprintf(buf, size, pszFormat, argptrcopy); + +#ifndef __WXWINCE__ + // Set errno to 0 to make it determinate if wxVsnprintf fails to set it. + errno = 0; +#endif + int len = wxVsnprintf(buf, size, format, 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 - buf[size] = _T('\0'); + // FIXME: This really seems to be the wrong and would be an off-by-one + // bug except the code above allocates an extra character. + buf[size] = wxT('\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 ) { + // NB: wxVsnprintf() may call either wxCRT_VsnprintfW or + // wxCRT_VsnprintfA in UTF-8 build; wxUSE_WXVSNPRINTF + // is true if *both* of them use our own implementation, + // otherwise we can't be sure +#if wxUSE_WXVSNPRINTF + // we know that our own implementation of wxVsnprintf() returns -1 + // only for a format error - thus there's something wrong with + // the user's format string + buf[0] = '\0'; + return -1; +#else // possibly using system version + // assume it only returns error if there is not enough space, but + // as we don't know how much we need, double the current size of + // the buffer +#ifndef __WXWINCE__ + if( (errno == EILSEQ) || (errno == EINVAL) ) + // If errno was set to one of the two well-known hard errors + // then fail immediately to avoid an infinite loop. + return -1; + else +#endif // __WXWINCE__ // still not enough, as we don't know how much we need, double the // current size of the buffer - size *= 2; + size *= 2; +#endif // wxUSE_WXVSNPRINTF/!wxUSE_WXVSNPRINTF } else if ( len >= size ) { +#if wxUSE_WXVSNPRINTF + // we know that our own implementation of wxVsnprintf() returns + // size+1 when there's not enough space but that's not the size + // of the required buffer! + size *= 2; // so we just double the current size of the buffer +#else // some vsnprintf() implementations NUL-terminate the buffer and // some don't in len == size case, to be safe always add 1 + // FIXME: I don't quite understand this comment. The vsnprintf + // function is specifically defined to return the number of + // characters printed not including the null terminator. + // So OF COURSE you need to add 1 to get the right buffer size. + // The following line is definitely correct, no question. size = len + 1; +#endif } else // ok, there was enough space { @@ -1854,9 +2071,34 @@ int wxString::PrintfV(const wxChar* pszFormat, va_list argptr) } // we could have overshot - Shrink(); + str.Shrink(); + + return str.length(); +} + +int wxString::PrintfV(const wxString& format, va_list argptr) +{ +#if wxUSE_UNICODE_UTF8 + #if wxUSE_STL_BASED_WXSTRING + typedef wxStringTypeBuffer Utf8Buffer; + #else + typedef wxStringInternalBuffer Utf8Buffer; + #endif +#endif - return length(); +#if wxUSE_UTF8_LOCALE_ONLY + return DoStringPrintfV(*this, format, argptr); +#else + #if wxUSE_UNICODE_UTF8 + if ( wxLocaleIsUtf8 ) + return DoStringPrintfV(*this, format, argptr); + else + // wxChar* version + return DoStringPrintfV(*this, format, argptr); + #else + return DoStringPrintfV(*this, format, argptr); + #endif // UTF8/WCHAR +#endif } // ---------------------------------------------------------------------------- @@ -1866,7 +2108,7 @@ int wxString::PrintfV(const wxChar* pszFormat, va_list argptr) // 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 +bool wxString::Matches(const wxString& mask) const { // I disable this code as it doesn't seem to be faster (in fact, it seems // to be much slower) than the old, hand-written code below and using it @@ -1877,31 +2119,31 @@ bool wxString::Matches(const wxChar *pszMask) const wxString pattern; pattern.reserve(wxStrlen(pszMask)); - pattern += _T('^'); + pattern += wxT('^'); while ( *pszMask ) { switch ( *pszMask ) { - case _T('?'): - pattern += _T('.'); + case wxT('?'): + pattern += wxT('.'); break; - case _T('*'): - pattern += _T(".*"); + case wxT('*'): + pattern += wxT(".*"); break; - case _T('^'): - case _T('.'): - case _T('$'): - case _T('('): - case _T(')'): - case _T('|'): - case _T('+'): - case _T('\\'): + case wxT('^'): + case wxT('.'): + case wxT('$'): + case wxT('('): + case wxT(')'): + case wxT('|'): + case wxT('+'): + case wxT('\\'): // these characters are special in a RE, quote them // (however note that we don't quote '[' and ']' to allow // using them for Unix shell like matching) - pattern += _T('\\'); + pattern += wxT('\\'); // fall through default: @@ -1910,15 +2152,24 @@ bool wxString::Matches(const wxChar *pszMask) const pszMask++; } - pattern += _T('$'); + pattern += wxT('$'); // and now use it return wxRegEx(pattern, wxRE_NOSUB | wxRE_EXTENDED).Matches(c_str()); #else // !wxUSE_REGEX // TODO: this is, of course, awfully inefficient... + // FIXME-UTF8: implement using iterators, remove #if +#if wxUSE_UNICODE_UTF8 + const wxScopedWCharBuffer maskBuf = mask.wc_str(); + const wxScopedWCharBuffer txtBuf = wc_str(); + const wxChar *pszMask = maskBuf.data(); + const wxChar *pszTxt = txtBuf.data(); +#else + const wxChar *pszMask = mask.wx_str(); // the char currently being checked - const wxChar *pszTxt = c_str(); + const wxChar *pszTxt = wx_str(); +#endif // the last location where '*' matched const wxChar *pszLastStarInText = NULL; @@ -2002,527 +2253,14 @@ match: } // Count the number of chars -int wxString::Freq(wxChar ch) const +int wxString::Freq(wxUniChar ch) const { int count = 0; - int len = length(); - for (int i = 0; i < len; i++) + for ( const_iterator i = begin(); i != end(); ++i ) { - if (GetChar(i) == ch) + if ( *i == ch ) count ++; } return count; } -// convert to upper case, return the copy of the string -wxString wxString::Upper() const -{ wxString s(*this); return s.MakeUpper(); } - -// convert to lower case, return the copy of the string -wxString wxString::Lower() const { wxString s(*this); return s.MakeLower(); } - -int wxString::sprintf(const wxChar *pszFormat, ...) - { - va_list argptr; - va_start(argptr, pszFormat); - int iLen = PrintfV(pszFormat, argptr); - va_end(argptr); - return iLen; - } - -// ============================================================================ -// ArrayString -// ============================================================================ - -#include "wx/arrstr.h" - -wxArrayString::wxArrayString(size_t sz, const wxChar** a) -{ -#if !wxUSE_STL - Init(false); -#endif - for (size_t i=0; i < sz; i++) - Add(a[i]); -} - -wxArrayString::wxArrayString(size_t sz, const wxString* a) -{ -#if !wxUSE_STL - Init(false); -#endif - for (size_t i=0; i < sz; i++) - Add(a[i]); -} - -#if !wxUSE_STL - -// size increment = min(50% of current size, ARRAY_MAXSIZE_INCREMENT) -#define ARRAY_MAXSIZE_INCREMENT 4096 - -#ifndef ARRAY_DEFAULT_INITIAL_SIZE // also defined in dynarray.h -#define ARRAY_DEFAULT_INITIAL_SIZE (16) -#endif - -#define STRING(p) ((wxString *)(&(p))) - -// ctor -void wxArrayString::Init(bool autoSort) -{ - m_nSize = - m_nCount = 0; - m_pItems = (wxChar **) NULL; - m_autoSort = autoSort; -} - -// copy ctor -wxArrayString::wxArrayString(const wxArrayString& src) -{ - Init(src.m_autoSort); - - *this = src; -} - -// assignment operator -wxArrayString& wxArrayString::operator=(const wxArrayString& src) -{ - if ( m_nSize > 0 ) - Clear(); - - Copy(src); - - m_autoSort = src.m_autoSort; - - return *this; -} - -void wxArrayString::Copy(const wxArrayString& src) -{ - if ( src.m_nCount > ARRAY_DEFAULT_INITIAL_SIZE ) - Alloc(src.m_nCount); - - for ( size_t n = 0; n < src.m_nCount; n++ ) - Add(src[n]); -} - -// grow the array -void wxArrayString::Grow(size_t nIncrement) -{ - // only do it if no more place - if ( (m_nSize - m_nCount) < nIncrement ) { - // if ARRAY_DEFAULT_INITIAL_SIZE were set to 0, the initially empty would - // be never resized! - #if ARRAY_DEFAULT_INITIAL_SIZE == 0 - #error "ARRAY_DEFAULT_INITIAL_SIZE must be > 0!" - #endif - - if ( m_nSize == 0 ) { - // was empty, alloc some memory - m_nSize = ARRAY_DEFAULT_INITIAL_SIZE; - if (m_nSize < nIncrement) - m_nSize = nIncrement; - m_pItems = new wxChar *[m_nSize]; - } - else { - // otherwise when it's called for the first time, nIncrement would be 0 - // and the array would never be expanded - // add 50% but not too much - size_t ndefIncrement = m_nSize < ARRAY_DEFAULT_INITIAL_SIZE - ? ARRAY_DEFAULT_INITIAL_SIZE : m_nSize >> 1; - if ( ndefIncrement > ARRAY_MAXSIZE_INCREMENT ) - ndefIncrement = ARRAY_MAXSIZE_INCREMENT; - if ( nIncrement < ndefIncrement ) - nIncrement = ndefIncrement; - m_nSize += nIncrement; - wxChar **pNew = new wxChar *[m_nSize]; - - // copy data to new location - memcpy(pNew, m_pItems, m_nCount*sizeof(wxChar *)); - - // delete old memory (but do not release the strings!) - wxDELETEA(m_pItems); - - m_pItems = pNew; - } - } -} - -void wxArrayString::Free() -{ - for ( size_t n = 0; n < m_nCount; n++ ) { - STRING(m_pItems[n])->GetStringData()->Unlock(); - } -} - -// deletes all the strings from the list -void wxArrayString::Empty() -{ - Free(); - - m_nCount = 0; -} - -// as Empty, but also frees memory -void wxArrayString::Clear() -{ - Free(); - - m_nSize = - m_nCount = 0; - - wxDELETEA(m_pItems); -} - -// dtor -wxArrayString::~wxArrayString() -{ - Free(); - - wxDELETEA(m_pItems); -} - -void wxArrayString::reserve(size_t nSize) -{ - Alloc(nSize); -} - -// pre-allocates memory (frees the previous data!) -void wxArrayString::Alloc(size_t nSize) -{ - // only if old buffer was not big enough - if ( nSize > m_nSize ) { - Free(); - wxDELETEA(m_pItems); - m_pItems = new wxChar *[nSize]; - m_nSize = nSize; - } - - m_nCount = 0; -} - -// minimizes the memory usage by freeing unused memory -void wxArrayString::Shrink() -{ - // only do it if we have some memory to free - if( m_nCount < m_nSize ) { - // allocates exactly as much memory as we need - wxChar **pNew = new wxChar *[m_nCount]; - - // copy data to new location - memcpy(pNew, m_pItems, m_nCount*sizeof(wxChar *)); - delete [] m_pItems; - m_pItems = pNew; - } -} - -#if WXWIN_COMPATIBILITY_2_4 - -// return a wxString[] as required for some control ctors. -wxString* wxArrayString::GetStringArray() const -{ - wxString *array = 0; - - if( m_nCount > 0 ) - { - array = new wxString[m_nCount]; - for( size_t i = 0; i < m_nCount; i++ ) - array[i] = m_pItems[i]; - } - - 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) -int wxArrayString::Index(const wxChar *sz, bool bCase, bool bFromEnd) const -{ - if ( m_autoSort ) { - // use binary search in the sorted array - wxASSERT_MSG( bCase && !bFromEnd, - wxT("search parameters ignored for auto sorted array") ); - - size_t i, - lo = 0, - hi = m_nCount; - int res; - while ( lo < hi ) { - i = (lo + hi)/2; - - res = wxStrcmp(sz, m_pItems[i]); - if ( res < 0 ) - hi = i; - else if ( res > 0 ) - lo = i + 1; - else - return i; - } - - return wxNOT_FOUND; - } - else { - // use linear search in unsorted array - if ( bFromEnd ) { - if ( m_nCount > 0 ) { - size_t ui = m_nCount; - do { - if ( STRING(m_pItems[--ui])->IsSameAs(sz, bCase) ) - return ui; - } - while ( ui != 0 ); - } - } - else { - for( size_t ui = 0; ui < m_nCount; ui++ ) { - if( STRING(m_pItems[ui])->IsSameAs(sz, bCase) ) - return ui; - } - } - } - - return wxNOT_FOUND; -} - -// add item at the end -size_t wxArrayString::Add(const wxString& str, size_t nInsert) -{ - if ( m_autoSort ) { - // insert the string at the correct position to keep the array sorted - size_t i, - lo = 0, - hi = m_nCount; - int res; - while ( lo < hi ) { - i = (lo + hi)/2; - - res = str.Cmp(m_pItems[i]); - if ( res < 0 ) - hi = i; - else if ( res > 0 ) - lo = i + 1; - else { - lo = hi = i; - break; - } - } - - wxASSERT_MSG( lo == hi, wxT("binary search broken") ); - - Insert(str, lo, nInsert); - - return (size_t)lo; - } - else { - wxASSERT( str.GetStringData()->IsValid() ); - - Grow(nInsert); - - for (size_t i = 0; i < nInsert; i++) - { - // the string data must not be deleted! - str.GetStringData()->Lock(); - - // just append - m_pItems[m_nCount + i] = (wxChar *)str.c_str(); // const_cast - } - size_t ret = m_nCount; - m_nCount += nInsert; - return ret; - } -} - -// add item at the given position -void wxArrayString::Insert(const wxString& str, size_t nIndex, size_t nInsert) -{ - wxASSERT( str.GetStringData()->IsValid() ); - - wxCHECK_RET( nIndex <= m_nCount, wxT("bad index in wxArrayString::Insert") ); - wxCHECK_RET( m_nCount <= m_nCount + nInsert, - wxT("array size overflow in wxArrayString::Insert") ); - - Grow(nInsert); - - memmove(&m_pItems[nIndex + nInsert], &m_pItems[nIndex], - (m_nCount - nIndex)*sizeof(wxChar *)); - - for (size_t i = 0; i < nInsert; i++) - { - str.GetStringData()->Lock(); - m_pItems[nIndex + i] = (wxChar *)str.c_str(); - } - 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) -{ - Alloc(count); - - wxString s; - while ( m_nCount < count ) - m_pItems[m_nCount++] = (wxChar *)s.c_str(); -} - -// removes item from array (by index) -void wxArrayString::RemoveAt(size_t nIndex, size_t nRemove) -{ - wxCHECK_RET( nIndex < m_nCount, wxT("bad index in wxArrayString::Remove") ); - wxCHECK_RET( nIndex + nRemove <= m_nCount, - wxT("removing too many elements in wxArrayString::Remove") ); - - // release our lock - for (size_t i = 0; i < nRemove; i++) - Item(nIndex + i).GetStringData()->Unlock(); - - memmove(&m_pItems[nIndex], &m_pItems[nIndex + nRemove], - (m_nCount - nIndex - nRemove)*sizeof(wxChar *)); - m_nCount -= nRemove; -} - -// removes item from array (by value) -void wxArrayString::Remove(const wxChar *sz) -{ - int iIndex = Index(sz); - - wxCHECK_RET( iIndex != wxNOT_FOUND, - wxT("removing inexistent element in wxArrayString::Remove") ); - - RemoveAt(iIndex); -} - -void wxArrayString::assign(const_iterator first, const_iterator last) -{ - reserve(last - first); - for(; first != last; ++first) - push_back(*first); -} - -// ---------------------------------------------------------------------------- -// sorting -// ---------------------------------------------------------------------------- - -// we can only sort one array at a time with the quick-sort based -// implementation -#if wxUSE_THREADS - // need a critical section to protect access to gs_compareFunction and - // gs_sortAscending variables - static wxCriticalSection gs_critsectStringSort; -#endif // wxUSE_THREADS - -// function to use for string comparaison -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; - -// function which is called by quick sort -extern "C" int wxC_CALLING_CONV // LINKAGEMODE -wxStringCompareFunction(const void *first, const void *second) -{ - wxString *strFirst = (wxString *)first; - wxString *strSecond = (wxString *)second; - - if ( gs_compareFunction ) { - return gs_compareFunction(*strFirst, *strSecond); - } - else { - // maybe we should use wxStrcoll - int result = strFirst->Cmp(*strSecond); - - return gs_sortAscending ? result : -result; - } -} - -// sort array elements using passed comparaison function -void wxArrayString::Sort(CompareFunction compareFunction) -{ - wxCRIT_SECT_LOCKER(lockCmpFunc, gs_critsectStringSort); - - wxASSERT( !gs_compareFunction ); // must have been reset to NULL - gs_compareFunction = compareFunction; - - DoSort(); - - // reset it to NULL so that Sort(bool) will work the next time - gs_compareFunction = NULL; -} - -extern "C" -{ - typedef int (wxC_CALLING_CONV * wxStringCompareFn)(const void *first, - const void *second); -} - -void wxArrayString::Sort(CompareFunction2 compareFunction) -{ - qsort(m_pItems, m_nCount, sizeof(wxChar *), (wxStringCompareFn)compareFunction); -} - -void wxArrayString::Sort(bool reverseOrder) -{ - Sort(reverseOrder ? wxStringSortDescending : wxStringSortAscending); -} - -void wxArrayString::DoSort() -{ - wxCHECK_RET( !m_autoSort, wxT("can't use this method with sorted arrays") ); - - // just sort the pointers using qsort() - of course it only works because - // wxString() *is* a pointer to its data - qsort(m_pItems, m_nCount, sizeof(wxChar *), wxStringCompareFunction); -} - -bool wxArrayString::operator==(const wxArrayString& a) const -{ - if ( m_nCount != a.m_nCount ) - return false; - - for ( size_t n = 0; n < m_nCount; n++ ) - { - if ( Item(n) != a[n] ) - return false; - } - - return true; -} - -#endif // !wxUSE_STL - -int wxCMPFUNC_CONV wxStringSortAscending(wxString* s1, wxString* s2) -{ - return s1->Cmp(*s2); -} - -int wxCMPFUNC_CONV wxStringSortDescending(wxString* s1, wxString* s2) -{ - return -s1->Cmp(*s2); -}