// 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
// ===========================================================================
#ifndef WX_PRECOMP
#include "wx/string.h"
- #include "wx/intl.h"
- #include "wx/thread.h"
+ #include "wx/wxcrtvararg.h"
#endif
#include <ctype.h>
#include <clib.h>
#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)
-
+#include "wx/hashmap.h"
// string handling functions used by wxString:
#if wxUSE_UNICODE_UTF8
// static class variables definition
// ---------------------------------------------------------------------------
-#if !wxUSE_STL_BASED_WXSTRING
- //According to STL _must_ be a -1 size_t
- const size_t wxStringImpl::npos = (size_t) -1;
-#endif
+//According to STL _must_ be a -1 size_t
const size_t wxString::npos = (size_t) -1;
-// ----------------------------------------------------------------------------
-// static data
-// ----------------------------------------------------------------------------
-
-#if wxUSE_STL_BASED_WXSTRING
-
-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;
-
-#endif
-
// ----------------------------------------------------------------------------
// global functions
// ----------------------------------------------------------------------------
#include <iostream>
-wxSTD ostream& operator<<(wxSTD ostream& os, const wxString& str)
-{
- return os << str.c_str();
-}
-
wxSTD ostream& operator<<(wxSTD ostream& os, const wxCStrData& str)
{
+// FIXME-UTF8: always, not only if wxUSE_UNICODE
#if wxUSE_UNICODE && !defined(__BORLANDC__)
- return os << str.AsWChar();
-#else
- return os << str.AsChar();
-#endif
-}
-
-#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)
+ return os << (const wchar_t*)str.AsWCharBuf();
#else
- #define STATISTICS_ADD(av, val)
-#endif // WXSTRING_STATISTICS
-
-#if !wxUSE_STL_BASED_WXSTRING
-
-// ===========================================================================
-// 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);
-}
+ return os << (const char*)str.AsCharBuf();
#endif
-
-// ===========================================================================
-// wxStringImpl
-// ===========================================================================
-
-// takes nLength elements of psz starting at nPos
-void wxStringImpl::InitWith(const wxChar *psz, size_t nPos, size_t nLength)
-{
- Init();
-
- // if the length is not given, assume the string to be NUL terminated
- if ( nLength == 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 wxStringImpl::InitWith") );
- return;
- }
- wxStringMemcpy(m_pchData, psz + nPos, nLength);
- }
}
-// poor man's iterators are "void *" pointers
-wxStringImpl::wxStringImpl(const void *pStart, const void *pEnd)
+wxSTD ostream& operator<<(wxSTD ostream& os, const wxString& str)
{
- if ( pEnd >= pStart )
- {
- InitWith((const wxChar *)pStart, 0,
- (const wxChar *)pEnd - (const wxChar *)pStart);
- }
- else
- {
- wxFAIL_MSG( _T("pStart is not before pEnd") );
- Init();
- }
+ return os << str.c_str();
}
-wxStringImpl::wxStringImpl(size_type n, wxStringCharType ch)
+wxSTD ostream& operator<<(wxSTD ostream& os, const wxCharBuffer& str)
{
- Init();
- append(n, ch);
+ return os << str.data();
}
-// ---------------------------------------------------------------------------
-// memory allocation
-// ---------------------------------------------------------------------------
-
-// allocates memory needed to store a C string of length nLen
-bool wxStringImpl::AllocBuffer(size_t nLen)
+#ifndef __BORLANDC__
+wxSTD ostream& operator<<(wxSTD ostream& os, const wxWCharBuffer& str)
{
- // allocating 0 sized buffer doesn't make sense, all empty strings should
- // reuse g_strEmpty
- wxASSERT( nLen > 0 );
-
- // make sure that we don't overflow
- wxASSERT( nLen < (INT_MAX / sizeof(wxChar)) -
- (sizeof(wxStringData) + EXTRA_ALLOC + 1) );
-
- STATISTICS_ADD(Length, nLen);
-
- // 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));
-
- if ( pData == NULL ) {
- // allocation failures are handled by the caller
- return false;
- }
-
- 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;
+ return os << str.data();
}
+#endif
-// must be called before changing this string
-bool wxStringImpl::CopyBeforeWrite()
-{
- 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;
- }
- wxStringMemcpy(m_pchData, pData->data(), nLen);
- }
+#endif // wxUSE_STD_IOSTREAM
- wxASSERT( !GetStringData()->IsShared() ); // we must be the only owner
+// ===========================================================================
+// wxString class core
+// ===========================================================================
- return true;
-}
+#if wxUSE_UNICODE_UTF8
-// must be called before replacing contents of this string
-bool wxStringImpl::AllocBeforeWrite(size_t nLen)
+void wxString::PosLenToImpl(size_t pos, size_t len,
+ size_t *implPos, size_t *implLen) const
{
- wxASSERT( nLen != 0 ); // doesn't make any sense
-
- // 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);
-
- nLen += EXTRA_ALLOC;
-
- pData = (wxStringData*)
- realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar));
-
- if ( pData == NULL ) {
- // allocation failures are handled by the caller
- // keep previous data since reallocation failed
- return false;
- }
+ if ( pos == npos )
+ *implPos = npos;
+ else
+ {
+ const_iterator i = begin() + pos;
+ *implPos = wxStringImpl::const_iterator(i.impl()) - m_impl.begin();
+ if ( len == npos )
+ *implLen = npos;
+ else
+ {
+ // too large length is interpreted as "to the end of the string"
+ // FIXME-UTF8: verify this is the case in std::string, assert
+ // otherwise
+ if ( pos + len > length() )
+ len = length() - pos;
- pData->nAllocLength = nLen;
- m_pchData = pData->data();
+ *implLen = (i + len).impl() - i.impl();
+ }
}
- }
-
- wxASSERT( !GetStringData()->IsShared() ); // we must be the only owner
-
- // it doesn't really matter what the string length is as it's going to be
- // overwritten later but, for extra safety, set it to 0 for now as we may
- // have some junk in m_pchData
- GetStringData()->nDataLength = 0;
-
- return true;
}
-wxStringImpl& wxStringImpl::append(size_t n, wxStringCharType ch)
-{
- size_type len = length();
-
- if ( !Alloc(len + n) || !CopyBeforeWrite() ) {
- wxFAIL_MSG( _T("out of memory in wxStringImpl::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;
-}
+#endif // wxUSE_UNICODE_UTF8
-void wxStringImpl::resize(size_t nSize, wxStringCharType ch)
-{
- size_t len = length();
+// ----------------------------------------------------------------------------
+// wxCStrData converted strings caching
+// ----------------------------------------------------------------------------
- if ( nSize < len )
+// 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<typename T>
+static inline void DeleteStringFromConversionCache(T& hash, const wxString *s)
+{
+ typename T::iterator i = hash.find(wxConstCast(s, wxString));
+ if ( i != hash.end() )
{
- erase(begin() + nSize, end());
- }
- else if ( nSize > len )
- {
- append(nSize - len, ch);
- }
- //else: we have exactly the specified length, nothing to do
-}
-
-// allocate enough memory for nLen characters
-bool wxStringImpl::Alloc(size_t nLen)
-{
- wxStringData *pData = GetStringData();
- if ( pData->nAllocLength <= nLen ) {
- if ( pData->IsEmpty() ) {
- nLen += EXTRA_ALLOC;
-
- pData = (wxStringData *)
- malloc(sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar));
-
- if ( pData == NULL ) {
- // allocation failure handled by caller
- return false;
- }
-
- pData->nRefs = 1;
- pData->nDataLength = 0;
- pData->nAllocLength = nLen;
- m_pchData = pData->data(); // data starts after wxStringData
- m_pchData[0u] = wxT('\0');
+ free(i->second);
+ hash.erase(i);
}
- 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;
-
- pData = (wxStringData *)
- realloc(pData, sizeof(wxStringData) + (nLen + 1)*sizeof(wxChar));
-
- if ( pData == NULL ) {
- // allocation failure handled by caller
- // keep previous data since reallocation failed
- return false;
- }
-
- // 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;
-}
-
-wxStringImpl::iterator wxStringImpl::begin()
-{
- if (length() > 0)
- CopyBeforeWrite();
- return m_pchData;
-}
-
-wxStringImpl::iterator wxStringImpl::end()
-{
- if (length() > 0)
- CopyBeforeWrite();
- return m_pchData + length();
}
-wxStringImpl::iterator wxStringImpl::erase(iterator it)
-{
- size_type idx = it - begin();
- erase(idx, 1);
- return begin() + idx;
-}
-
-wxStringImpl& wxStringImpl::erase(size_t nStart, size_t nLen)
-{
- wxASSERT(nStart <= length());
- size_t strLen = length() - nStart;
- // delete nLen or up to the end of the string characters
- nLen = strLen < nLen ? strLen : nLen;
- wxStringImpl strTmp(c_str(), nStart);
- strTmp.append(c_str() + nStart + nLen, length() - nStart - nLen);
-
- swap(strTmp);
- return *this;
-}
+#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;
-wxStringImpl& wxStringImpl::insert(size_t nPos, const wxChar *sz, size_t n)
+const char* wxCStrData::AsChar() const
{
- wxASSERT( nPos <= length() );
+ // remove previously cache value, if any (see FIXMEs above):
+ DeleteStringFromConversionCache(gs_stringsCharCache, m_str);
- if ( n == npos ) n = wxStrlen(sz);
- if ( n == 0 ) return *this;
+ // convert the string and keep it:
+ const char *s = gs_stringsCharCache[wxConstCast(m_str, wxString)] =
+ m_str->mb_str().release();
- if ( !Alloc(length() + n) || !CopyBeforeWrite() ) {
- wxFAIL_MSG( _T("out of memory in wxStringImpl::insert") );
- }
-
- memmove(m_pchData + nPos + n, m_pchData + nPos,
- (length() - nPos) * sizeof(wxChar));
- memcpy(m_pchData + nPos, sz, n * sizeof(wxChar));
- GetStringData()->nDataLength = length() + n;
- m_pchData[length()] = '\0';
-
- return *this;
+ return s + m_offset;
}
+#endif // wxUSE_UNICODE
-void wxStringImpl::swap(wxStringImpl& str)
-{
- wxStringCharType* tmp = str.m_pchData;
- str.m_pchData = m_pchData;
- m_pchData = tmp;
-}
+#if !wxUSE_UNICODE_WCHAR
+WX_DECLARE_HASH_MAP(wxString*, wchar_t*, wxPointerHash, wxPointerEqual,
+ wxStringWCharConversionCache);
+static wxStringWCharConversionCache gs_stringsWCharCache;
-size_t wxStringImpl::find(const wxStringImpl& str, size_t nStart) const
+const wchar_t* wxCStrData::AsWChar() const
{
- // deal with the special case of empty string first
- const size_t nLen = length();
- const size_t nLenOther = str.length();
-
- if ( !nLenOther )
- {
- // empty string is a substring of anything
- return 0;
- }
-
- if ( !nLen )
- {
- // the other string is non empty so can't be our substring
- return npos;
- }
-
- wxASSERT( str.GetStringData()->IsValid() );
- wxASSERT( nStart <= nLen );
-
- const wxStringCharType * const other = str.c_str();
-
- // anchor
- const wxStringCharType* p =
- (const wxStringCharType*)wxStringMemchr(c_str() + nStart,
- *other,
- nLen - nStart);
-
- if ( !p )
- return npos;
-
- while ( p - c_str() + nLenOther <= nLen &&
- wxStringMemcmp(p, other, nLenOther) )
- {
- p++;
+ // remove previously cache value, if any (see FIXMEs above):
+ DeleteStringFromConversionCache(gs_stringsWCharCache, m_str);
- // anchor again
- p = (const wxStringCharType*)
- wxStringMemchr(p, *other, nLen - (p - c_str()));
+ // convert the string and keep it:
+ const wchar_t *s = gs_stringsWCharCache[wxConstCast(m_str, wxString)] =
+ m_str->wc_str().release();
- if ( !p )
- return npos;
- }
-
- return p - c_str() + nLenOther <= nLen ? p - c_str() : npos;
+ return s + m_offset;
}
+#endif // !wxUSE_UNICODE_WCHAR
-size_t wxStringImpl::find(const wxChar* sz, size_t nStart, size_t n) const
+wxString::~wxString()
{
- return find(wxStringImpl(sz, n), nStart);
-}
-
-size_t wxStringImpl::find(wxStringCharType ch, size_t nStart) const
-{
- wxASSERT( nStart <= length() );
-
- const wxStringCharType *p = (const wxStringCharType*)
- wxStringMemchr(c_str() + nStart, ch, length() - nStart);
-
- return p == NULL ? npos : p - c_str();
+#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
-size_t wxStringImpl::rfind(const wxStringImpl& str, size_t nStart) const
+#if wxUSE_UNICODE
+const char* wxCStrData::AsChar() const
{
- wxASSERT( str.GetStringData()->IsValid() );
- wxASSERT( nStart == npos || nStart <= length() );
-
- if ( length() >= str.length() )
- {
- // avoids a corner case later
- if ( length() == 0 && str.length() == 0 )
- return 0;
+ wxString *str = wxConstCast(m_str, wxString);
- // "top" is the point where search starts from
- size_t top = length() - str.length();
+ // convert the string:
+ wxCharBuffer buf(str->mb_str());
- if ( nStart == npos )
- nStart = length() - 1;
- if ( nStart < top )
- top = nStart;
-
- const wxStringCharType *cursor = c_str() + top;
- do
- {
- if ( wxStringMemcmp(cursor, str.c_str(), str.length()) == 0 )
- {
- return cursor - c_str();
- }
- } while ( cursor-- > c_str() );
- }
-
- return npos;
-}
-
-size_t wxStringImpl::rfind(const wxChar* sz, size_t nStart, size_t n) const
-{
- return rfind(wxStringImpl(sz, n), nStart);
-}
-
-size_t wxStringImpl::rfind(wxStringCharType ch, size_t nStart) const
-{
- if ( nStart == npos )
+ // FIXME-UTF8: do the conversion in-place in the existing buffer
+ if ( str->m_convertedToChar &&
+ strlen(buf) == strlen(str->m_convertedToChar) )
{
- nStart = length();
+ // keep the same buffer for as long as possible, so that several calls
+ // to c_str() in a row still work:
+ strcpy(str->m_convertedToChar, buf);
}
else
{
- wxASSERT( nStart <= length() );
- }
-
- const wxStringCharType *actual;
- for ( actual = c_str() + ( nStart == npos ? length() : nStart + 1 );
- actual > c_str(); --actual )
- {
- if ( *(actual - 1) == ch )
- return (actual - 1) - c_str();
- }
-
- return npos;
-}
-
-wxStringImpl& wxStringImpl::replace(size_t nStart, size_t nLen,
- const wxChar *sz)
-{
- wxASSERT_MSG( nStart <= length(),
- _T("index out of bounds in wxStringImpl::replace") );
- size_t strLen = length() - nStart;
- nLen = strLen < nLen ? strLen : nLen;
-
- wxStringImpl strTmp;
- strTmp.reserve(length()); // micro optimisation to avoid multiple mem allocs
-
- //This is kind of inefficient, but its pretty good considering...
- //we don't want to use character access operators here because on STL
- //it will freeze the reference count of strTmp, which means a deep copy
- //at the end when swap is called
- //
- //Also, we can't use append with the full character pointer and must
- //do it manually because this string can contain null characters
- for(size_t i1 = 0; i1 < nStart; ++i1)
- strTmp.append(1, this->c_str()[i1]);
-
- //its safe to do the full version here because
- //sz must be a normal c string
- strTmp.append(sz);
-
- for(size_t i2 = nStart + nLen; i2 < length(); ++i2)
- strTmp.append(1, this->c_str()[i2]);
-
- swap(strTmp);
- return *this;
-}
-
-wxStringImpl& wxStringImpl::replace(size_t nStart, size_t nLen,
- size_t nCount, wxStringCharType ch)
-{
- return replace(nStart, nLen, wxStringImpl(nCount, ch).c_str());
-}
-
-wxStringImpl& wxStringImpl::replace(size_t nStart, size_t nLen,
- const wxStringImpl& str,
- size_t nStart2, size_t nLen2)
-{
- return replace(nStart, nLen, str.substr(nStart2, nLen2));
-}
-
-wxStringImpl& wxStringImpl::replace(size_t nStart, size_t nLen,
- const wxChar* sz, size_t nCount)
-{
- return replace(nStart, nLen, wxStringImpl(sz, nCount).c_str());
-}
-
-wxStringImpl wxStringImpl::substr(size_t nStart, size_t nLen) const
-{
- if ( nLen == npos )
- nLen = length() - nStart;
- return wxStringImpl(*this, nStart, nLen);
-}
-
-// assigns one string to another
-wxStringImpl& wxStringImpl::operator=(const wxStringImpl& stringSrc)
-{
- wxASSERT( stringSrc.GetStringData()->IsValid() );
-
- // don't copy string over itself
- if ( m_pchData != stringSrc.m_pchData ) {
- if ( stringSrc.GetStringData()->IsEmpty() ) {
- Reinit();
- }
- else {
- // adjust references
- GetStringData()->Unlock();
- m_pchData = stringSrc.m_pchData;
- GetStringData()->Lock();
- }
- }
-
- return *this;
-}
-
-// assigns a single character
-wxStringImpl& wxStringImpl::operator=(wxStringCharType ch)
-{
- wxChar c(ch);
- if ( !AssignCopy(1, &c) ) {
- wxFAIL_MSG( _T("out of memory in wxStringImpl::operator=(wxChar)") );
- }
- return *this;
-}
-
-// assigns C string
-wxStringImpl& wxStringImpl::operator=(const wxChar *psz)
-{
- if ( !AssignCopy(wxStrlen(psz), psz) ) {
- wxFAIL_MSG( _T("out of memory in wxStringImpl::operator=(const wxChar *)") );
- }
- return *this;
-}
-
-// helper function: does real copy
-bool wxStringImpl::AssignCopy(size_t nSrcLen, const wxChar *pszSrcData)
-{
- if ( nSrcLen == 0 ) {
- Reinit();
- }
- else {
- if ( !AllocBeforeWrite(nSrcLen) ) {
- // allocation failure handled by caller
- return false;
- }
- memcpy(m_pchData, pszSrcData, nSrcLen*sizeof(wxChar));
- GetStringData()->nDataLength = nSrcLen;
- m_pchData[nSrcLen] = wxT('\0');
- }
- return true;
-}
-
-// ---------------------------------------------------------------------------
-// string concatenation
-// ---------------------------------------------------------------------------
-
-// add something to this string
-bool wxStringImpl::ConcatSelf(size_t nSrcLen, const wxChar *pszSrcData,
- size_t nMaxLen)
-{
- STATISTICS_ADD(SummandLength, nSrcLen);
-
- nSrcLen = nSrcLen < nMaxLen ? nSrcLen : nMaxLen;
-
- // concatenating an empty string is a NOP
- if ( nSrcLen > 0 ) {
- wxStringData *pData = GetStringData();
- size_t nLen = pData->nDataLength;
- size_t nNewLen = nLen + nSrcLen;
-
- // alloc new buffer if current is too small
- if ( pData->IsShared() ) {
- STATISTICS_ADD(ConcatHit, 0);
-
- // we have to allocate another buffer
- wxStringData* pOldData = GetStringData();
- if ( !AllocBuffer(nNewLen) ) {
- // allocation failure handled by caller
- return false;
- }
- memcpy(m_pchData, pOldData->data(), nLen*sizeof(wxChar));
- pOldData->Unlock();
- }
- 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
+ str->m_convertedToChar = buf.release();
}
- // 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;
-}
-
-#endif // !wxUSE_STL_BASED_WXSTRING
-
-#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 m_impl.compare(str.m_impl);
-}
-
-int wxString::compare(size_t nStart, size_t nLen,
- const wxString& str) const
-{
- size_t pos, len;
- PosLenToImpl(nStart, nLen, &pos, &len);
- return m_impl.compare(pos, len, str.m_impl);
-}
-
-int wxString::compare(size_t nStart, size_t nLen,
- const wxString& str,
- size_t nStart2, size_t nLen2) const
-{
- size_t pos, len;
- PosLenToImpl(nStart, nLen, &pos, &len);
-
- size_t pos2, len2;
- str.PosLenToImpl(nStart2, nLen2, &pos2, &len2);
-
- return m_impl.compare(pos, len, str.m_impl, pos2, len2);
-}
-
-int wxString::compare(const char* sz) const
-{
- return m_impl.compare(ImplStr(sz));
-}
-
-int wxString::compare(const wchar_t* sz) const
-{
- return m_impl.compare(ImplStr(sz));
-}
-
-int wxString::compare(size_t nStart, size_t nLen,
- const char* sz, size_t nCount) const
-{
- size_t pos, len;
- PosLenToImpl(nStart, nLen, &pos, &len);
-
- SubstrBufFromMB str(sz, nCount);
-
- return m_impl.compare(pos, len, str.data, str.len);
+ // and keep it:
+ return str->m_convertedToChar + m_offset;
}
+#endif // wxUSE_UNICODE
-int wxString::compare(size_t nStart, size_t nLen,
- const wchar_t* sz, size_t nCount) const
+#if !wxUSE_UNICODE_WCHAR
+const wchar_t* wxCStrData::AsWChar() const
{
- size_t pos, len;
- PosLenToImpl(nStart, nLen, &pos, &len);
-
- SubstrBufFromWC str(sz, nCount);
+ wxString *str = wxConstCast(m_str, wxString);
- return m_impl.compare(pos, len, str.data, str.len);
-}
+ // convert the string:
+ wxWCharBuffer buf(str->wc_str());
-#else // !HAVE_STD_STRING_COMPARE
-
-static inline int wxDoCmp(const wxStringCharType* s1, size_t l1,
- const wxStringCharType* s2, size_t l2)
-{
- if( l1 == l2 )
- return wxStringMemcmp(s1, s2, l1);
- else if( l1 < l2 )
+ // FIXME-UTF8: do the conversion in-place in the existing buffer
+ if ( str->m_convertedToWChar &&
+ wxWcslen(buf) == wxWcslen(str->m_convertedToWChar) )
{
- int ret = wxStringMemcmp(s1, s2, l1);
- return ret == 0 ? -1 : ret;
+ // keep the same buffer for as long as possible, so that several calls
+ // to c_str() in a row still work:
+ memcpy(str->m_convertedToWChar, buf, sizeof(wchar_t) * wxWcslen(buf));
}
else
{
- int ret = wxStringMemcmp(s1, s2, l2);
- return ret == 0 ? +1 : ret;
+ str->m_convertedToWChar = buf.release();
}
-}
-
-int wxString::compare(const wxString& str) const
-{
- return ::wxDoCmp(m_impl.data(), m_impl.length(),
- str.m_impl.data(), str.m_impl.length());
-}
-
-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;
-
- 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 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());
- size_type strLen = length() - nStart,
- strLen2 = str.length() - nStart2;
- nLen = strLen < nLen ? strLen : nLen;
- nLen2 = strLen2 < nLen2 ? strLen2 : nLen2;
-
- size_t pos, len;
- PosLenToImpl(nStart, nLen, &pos, &len);
- size_t pos2, len2;
- str.PosLenToImpl(nStart2, nLen2, &pos2, &len2);
-
- return ::wxDoCmp(m_impl.data() + pos, len,
- str.m_impl.data() + pos2, len2);
-}
-
-int wxString::compare(const char* sz) const
-{
- 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);
-}
-
-int wxString::compare(const wchar_t* sz) const
-{
- 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);
-}
-
-int wxString::compare(size_t nStart, size_t nLen,
- const char* sz, size_t nCount) const
-{
- wxASSERT(nStart <= length());
- size_type strLen = length() - nStart;
- nLen = strLen < nLen ? strLen : nLen;
-
- size_t pos, len;
- PosLenToImpl(nStart, nLen, &pos, &len);
-
- SubstrBufFromMB str(ImplStr(sz, nCount));
- if ( str.len == npos )
- str.len = wxStringStrlen(str.data);
-
- return ::wxDoCmp(m_impl.data() + pos, len, str.data, str.len);
-}
-
-int wxString::compare(size_t nStart, size_t nLen,
- const wchar_t* sz, size_t nCount) const
-{
- wxASSERT(nStart <= length());
- size_type strLen = length() - nStart;
- nLen = strLen < nLen ? strLen : nLen;
-
- size_t pos, len;
- PosLenToImpl(nStart, nLen, &pos, &len);
- 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);
+ // and keep it:
+ return str->m_convertedToWChar + m_offset;
}
-
-#endif // HAVE_STD_STRING_COMPARE/!HAVE_STD_STRING_COMPARE
+#endif // !wxUSE_UNICODE_WCHAR
// ===========================================================================
// wxString class core
// construction and conversion
// ---------------------------------------------------------------------------
-#if wxUSE_UNICODE
+#if wxUSE_UNICODE_WCHAR
/* static */
wxString::SubstrBufFromMB wxString::ConvertStr(const char *psz, size_t nLength,
- const wxMBConv& conv)
+ const wxMBConv& conv)
{
// anything to do?
if ( !psz || nLength == 0 )
- return SubstrBufFromMB();
+ return SubstrBufFromMB(L"", 0);
if ( nLength == npos )
nLength = wxNO_LEN;
size_t wcLen;
wxWCharBuffer wcBuf(conv.cMB2WC(psz, nLength, &wcLen));
if ( !wcLen )
- return SubstrBufFromMB();
+ return SubstrBufFromMB(_T(""), 0);
else
return SubstrBufFromMB(wcBuf, wcLen);
}
-#else
+#endif // wxUSE_UNICODE_WCHAR
+
+#if wxUSE_UNICODE_UTF8
/* static */
-wxString::SubstrBufFromWC wxString::ConvertStr(const wchar_t *pwz, size_t nLength,
- const wxMBConv& conv)
+wxString::SubstrBufFromMB wxString::ConvertStr(const char *psz, size_t nLength,
+ const wxMBConv& conv)
{
+ // FIXME-UTF8: return as-is without copying under UTF8 locale, return
+ // converted string under other locales - needs wxCharBuffer
+ // changes
+
// anything to do?
- if ( !pwz || nLength == 0 )
- return SubstrBufFromWC();
+ if ( !psz || nLength == 0 )
+ return SubstrBufFromMB("", 0);
if ( nLength == npos )
nLength = wxNO_LEN;
- size_t mbLen;
- wxCharBuffer mbBuf(conv.cWC2MB(pwz, nLength, &mbLen));
- if ( !mbLen )
- return SubstrBufFromWC();
- else
- return SubstrBufFromWC(mbBuf, mbLen);
-}
-#endif
+ // first convert to wide string:
+ size_t wcLen;
+ wxWCharBuffer wcBuf(conv.cMB2WC(psz, nLength, &wcLen));
+ if ( !wcLen )
+ return SubstrBufFromMB("", 0);
+ // and then to UTF-8:
+ SubstrBufFromMB buf(ConvertStr(wcBuf, wcLen, wxConvUTF8));
+ // widechar -> UTF-8 conversion isn't supposed to ever fail:
+ wxASSERT_MSG( buf.data, _T("conversion to UTF-8 failed") );
-#if wxUSE_UNICODE
+ return buf;
+}
+#endif // wxUSE_UNICODE_UTF8
-// from multibyte string
-wxString::wxString(const char *psz, const wxMBConv& conv, size_t nLength)
+#if wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE
+/* static */
+wxString::SubstrBufFromWC wxString::ConvertStr(const wchar_t *pwz, size_t nLength,
+ const wxMBConv& conv)
{
- // FIXME-UTF8: this will need changes
-
// anything to do?
- if ( psz && nLength != 0 )
- {
- if ( nLength == npos )
- {
- nLength = wxNO_LEN;
- }
-
- size_t nLenWide;
- wxWCharBuffer wbuf = conv.cMB2WC(psz, nLength, &nLenWide);
+ if ( !pwz || nLength == 0 )
+ return SubstrBufFromWC("", 0);
- if ( nLenWide )
- assign(wbuf, nLenWide);
- }
-}
+ if ( nLength == npos )
+ nLength = wxNO_LEN;
-wxString::wxString(const char *psz, size_t nLength)
-{
- assign(psz, nLength);
+ size_t mbLen;
+ wxCharBuffer mbBuf(conv.cWC2MB(pwz, nLength, &mbLen));
+ if ( !mbLen )
+ return SubstrBufFromWC("", 0);
+ else
+ return SubstrBufFromWC(mbBuf, mbLen);
}
+#endif // wxUSE_UNICODE_UTF8 || !wxUSE_UNICODE
+
+
+#if wxUSE_UNICODE_WCHAR
//Convert wxString in Unicode mode to a multi-byte string
const wxCharBuffer wxString::mb_str(const wxMBConv& conv) const
{
- return conv.cWC2MB(c_str(), length() + 1 /* size, not length */, NULL);
+ return conv.cWC2MB(wx_str(), length() + 1 /* size, not length */, NULL);
}
-#else // ANSI
-
-#if wxUSE_WCHAR_T
+#elif wxUSE_UNICODE_UTF8
-// from wide string
-wxString::wxString(const wchar_t *pwz, const wxMBConv& conv, size_t nLength)
+const wxWCharBuffer wxString::wc_str() const
{
- // FIXME-UTF8: this will need changes
-
- // anything to do?
- if ( pwz && nLength != 0 )
- {
- if ( nLength == npos )
- {
- nLength = wxNO_LEN;
- }
+ return wxConvUTF8.cMB2WC(m_impl.c_str(),
+ m_impl.length() + 1 /* size, not length */,
+ NULL);
+}
- size_t nLenMB;
- wxCharBuffer buf = conv.cWC2MB(pwz, nLength, &nLenMB);
+const wxCharBuffer wxString::mb_str(const wxMBConv& conv) const
+{
+ // FIXME-UTF8: optimize the case when conv==wxConvUTF8 or wxConvLibc
+ // under UTF8 locale
+ // FIXME-UTF8: use wc_str() here once we have buffers with length
- if ( nLenMB )
- assign(buf, nLenMB);
- }
+ size_t wcLen;
+ wxWCharBuffer wcBuf(
+ wxConvUTF8.cMB2WC(m_impl.c_str(),
+ m_impl.length() + 1 /* size, not length */,
+ &wcLen));
+ if ( !wcLen )
+ return wxCharBuffer("");
+ return conv.cWC2MB(wcBuf, wcLen, NULL);
}
-wxString::wxString(const wchar_t *pwz, size_t nLength)
-{
- assign(pwz, nLength);
-}
+#else // ANSI
//Converts this string to a wide character string if unicode
//mode is not enabled and wxUSE_WCHAR_T is enabled
const wxWCharBuffer wxString::wc_str(const wxMBConv& conv) const
{
- return conv.cMB2WC(c_str(), length() + 1 /* size, not length */, NULL);
+ return conv.cMB2WC(wx_str(), length() + 1 /* size, not length */, NULL);
}
-#endif // wxUSE_WCHAR_T
-
#endif // Unicode/ANSI
// shrink to minimal size (releasing extra memory)
return tmp.length() == length();
}
-#if !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8
-// get the pointer to writable buffer of (at least) nLen bytes
-wxChar *wxStringImpl::DoGetWriteBuf(size_t nLen)
-{
- if ( !AllocBeforeWrite(nLen) ) {
- // allocation failure handled by caller
- return NULL;
- }
-
- wxASSERT( GetStringData()->nRefs == 1 );
- GetStringData()->Validate(false);
-
- return m_pchData;
-}
-
-// put string back in a reasonable state after GetWriteBuf
-void wxStringImpl::DoUngetWriteBuf()
-{
- DoUngetWriteBuf(wxStrlen(m_pchData));
-}
-
-void wxStringImpl::DoUngetWriteBuf(size_t nLen)
-{
- wxStringData * const pData = GetStringData();
-
- wxASSERT_MSG( nLen < pData->nAllocLength, _T("buffer overrun") );
-
- // the strings we store are always NUL-terminated
- pData->data()[nLen] = _T('\0');
- pData->nDataLength = nLen;
- pData->Validate(true);
-}
-
// deprecated compatibility code:
-#if WXWIN_COMPATIBILITY_2_8
-wxChar *wxString::GetWriteBuf(size_t nLen)
+#if WXWIN_COMPATIBILITY_2_8 && !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8
+wxStringCharType *wxString::GetWriteBuf(size_t nLen)
{
return DoGetWriteBuf(nLen);
}
{
DoUngetWriteBuf(nLen);
}
-#endif // WXWIN_COMPATIBILITY_2_8
-
-#endif // !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8
+#endif // WXWIN_COMPATIBILITY_2_8 && !wxUSE_STL_BASED_WXSTRING && !wxUSE_UNICODE_UTF8
// ---------------------------------------------------------------------------
// all functions are inline in string.h
// ---------------------------------------------------------------------------
-// assignment operators
+// concatenation operators
// ---------------------------------------------------------------------------
-#if !wxUSE_UNICODE
-
-// same as 'signed char' variant
-wxString& wxString::operator=(const unsigned char* psz)
-{
- *this = (const char *)psz;
- return *this;
-}
-
-#if wxUSE_WCHAR_T
-wxString& wxString::operator=(const wchar_t *pwz)
-{
- wxString str(pwz);
- swap(str);
- return *this;
-}
-#endif
-
-#endif
-
/*
* concatenation functions come in 5 flavours:
* string + string
return s;
}
+// ---------------------------------------------------------------------------
+// string comparison
+// ---------------------------------------------------------------------------
+
+#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 m_impl.compare(str.m_impl);
+}
+
+int wxString::compare(size_t nStart, size_t nLen,
+ const wxString& str) const
+{
+ size_t pos, len;
+ PosLenToImpl(nStart, nLen, &pos, &len);
+ return m_impl.compare(pos, len, str.m_impl);
+}
+
+int wxString::compare(size_t nStart, size_t nLen,
+ const wxString& str,
+ size_t nStart2, size_t nLen2) const
+{
+ size_t pos, len;
+ PosLenToImpl(nStart, nLen, &pos, &len);
+
+ size_t pos2, len2;
+ str.PosLenToImpl(nStart2, nLen2, &pos2, &len2);
+
+ return m_impl.compare(pos, len, str.m_impl, pos2, len2);
+}
+
+int wxString::compare(const char* sz) const
+{
+ return m_impl.compare(ImplStr(sz));
+}
+
+int wxString::compare(const wchar_t* sz) const
+{
+ return m_impl.compare(ImplStr(sz));
+}
+
+int wxString::compare(size_t nStart, size_t nLen,
+ const char* sz, size_t nCount) const
+{
+ size_t pos, len;
+ PosLenToImpl(nStart, nLen, &pos, &len);
+
+ SubstrBufFromMB str(ImplStr(sz, nCount));
+
+ return m_impl.compare(pos, len, str.data, str.len);
+}
+
+int wxString::compare(size_t nStart, size_t nLen,
+ const wchar_t* sz, size_t nCount) const
+{
+ size_t pos, len;
+ PosLenToImpl(nStart, nLen, &pos, &len);
+
+ SubstrBufFromWC str(ImplStr(sz, nCount));
+
+ return m_impl.compare(pos, len, str.data, str.len);
+}
+
+#else // !HAVE_STD_STRING_COMPARE
+
+static inline int wxDoCmp(const wxStringCharType* s1, size_t l1,
+ const wxStringCharType* s2, size_t l2)
+{
+ if( l1 == l2 )
+ return wxStringMemcmp(s1, s2, l1);
+ else if( l1 < l2 )
+ {
+ int ret = wxStringMemcmp(s1, s2, l1);
+ return ret == 0 ? -1 : ret;
+ }
+ else
+ {
+ int ret = wxStringMemcmp(s1, s2, l2);
+ return ret == 0 ? +1 : ret;
+ }
+}
+
+int wxString::compare(const wxString& str) const
+{
+ return ::wxDoCmp(m_impl.data(), m_impl.length(),
+ str.m_impl.data(), str.m_impl.length());
+}
+
+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;
+
+ 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 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());
+ size_type strLen = length() - nStart,
+ strLen2 = str.length() - nStart2;
+ nLen = strLen < nLen ? strLen : nLen;
+ nLen2 = strLen2 < nLen2 ? strLen2 : nLen2;
+
+ size_t pos, len;
+ PosLenToImpl(nStart, nLen, &pos, &len);
+ size_t pos2, len2;
+ str.PosLenToImpl(nStart2, nLen2, &pos2, &len2);
+
+ return ::wxDoCmp(m_impl.data() + pos, len,
+ str.m_impl.data() + pos2, len2);
+}
+
+int wxString::compare(const char* sz) const
+{
+ 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);
+}
+
+int wxString::compare(const wchar_t* sz) const
+{
+ 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);
+}
+
+int wxString::compare(size_t nStart, size_t nLen,
+ const char* sz, size_t nCount) const
+{
+ wxASSERT(nStart <= length());
+ size_type strLen = length() - nStart;
+ nLen = strLen < nLen ? strLen : nLen;
+
+ size_t pos, len;
+ PosLenToImpl(nStart, nLen, &pos, &len);
+
+ SubstrBufFromMB str(ImplStr(sz, nCount));
+ if ( str.len == npos )
+ str.len = wxStringStrlen(str.data);
+
+ return ::wxDoCmp(m_impl.data() + pos, len, str.data, str.len);
+}
+
+int wxString::compare(size_t nStart, size_t nLen,
+ const wchar_t* sz, size_t nCount) const
+{
+ wxASSERT(nStart <= length());
+ size_type strLen = length() - nStart;
+ nLen = strLen < nLen ? strLen : nLen;
+
+ size_t pos, len;
+ PosLenToImpl(nStart, nLen, &pos, &len);
+
+ 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 // HAVE_STD_STRING_COMPARE/!HAVE_STD_STRING_COMPARE
+
+
// ---------------------------------------------------------------------------
// find_{first,last}_[not]_of functions
// ---------------------------------------------------------------------------
if (!ascii)
return wxEmptyString;
- size_t len = strlen( ascii );
+ size_t len = strlen(ascii);
wxString res;
if ( len )
{
- wxStringBuffer buf(res, len);
-
- wchar_t *dest = buf;
+ wxImplStringBuffer buf(res, len);
+ wxStringCharType *dest = buf;
for ( ;; )
{
- if ( (*dest++ = (wchar_t)(unsigned char)*ascii++) == L'\0' )
- break;
+ unsigned char c = (unsigned char)*ascii++;
+ wxASSERT_MSG( c < 0x80,
+ _T("Non-ASCII value passed to FromAscii().") );
+
+ *dest++ = (wchar_t)c;
+
+ if ( c == '\0' )
+ break;
}
}
{
// 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, _T("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
{
// 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
wxASSERT_MSG( suffix, _T("invalid parameter in wxString::EndssWith") );
int start = length() - wxStrlen(suffix);
- if ( start < 0 || wxStrcmp(wx_str() + start, suffix) != 0 )
+
+ if ( start < 0 || compare(start, npos, suffix) != 0 )
return false;
if ( rest )
}
// replace first (or all) occurences of some substring with another one
-size_t wxString::Replace(const wxChar *szOld,
- const wxChar *szNew, bool bReplaceAll)
+size_t wxString::Replace(const 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,
+ wxCHECK_MSG( !strOld.empty(), 0,
_T("wxString::Replace(): invalid parameter") );
size_t uiCount = 0; // count of replacements made
- size_t uiOldLen = wxStrlen(szOld);
- size_t uiNewLen = wxStrlen(szNew);
+ size_t uiOldLen = strOld.length();
+ size_t uiNewLen = strNew.length();
size_t dwPos = 0;
- while ( this->c_str()[dwPos] != wxT('\0') )
+ while ( (*this)[dwPos] != wxT('\0') )
{
//DO NOT USE STRSTR HERE
//this string can contain embedded null characters,
//so strstr will function incorrectly
- dwPos = find(szOld, dwPos);
+ dwPos = find(strOld, dwPos);
if ( dwPos == npos )
break; // exit the loop
else
{
//replace this occurance of the old string with the new one
- replace(dwPos, uiOldLen, szNew, uiNewLen);
+ replace(dwPos, uiOldLen, strNew, uiNewLen);
//move up pos past the string that was replaced
dwPos += uiNewLen;
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);
+bool wxString::IsWord() const
+{
+ 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 == _T('-') || *i == _T('+') )
+ ++i;
+
+ for ( ; i != end(); ++i )
+ {
+ if ( !wxIsdigit(*i) )
+ return false;
+ }
+
+ return true;
}
wxString wxString::Strip(stripType w) const
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
// ----------------------------------------------------------------------------
bool wxString::ToLongLong(wxLongLong_t *val, int base) const
{
-#ifdef wxHAS_STRTOLL
return wxStringToIntType((const wxChar*)c_str(), val, base, wxStrtoll);
-#else
- // TODO: implement this ourselves
- wxUnusedVar(val);
- wxUnusedVar(base);
- return false;
-#endif // wxHAS_STRTOLL
}
bool wxString::ToULongLong(wxULongLong_t *val, int base) const
{
-#ifdef wxHAS_STRTOLL
return wxStringToIntType((const wxChar*)c_str(), val, base, wxStrtoull);
-#else
- // TODO: implement this ourselves
- wxUnusedVar(val);
- wxUnusedVar(base);
- return false;
-#endif
}
bool wxString::ToDouble(double *val) const
/* static */
#ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN
-wxString wxStringPrintfMixinBase::DoFormat(const wxChar *format, ...)
+wxString wxStringPrintfMixinBase::DoFormat(const wxString& format, ...)
#else
-wxString wxString::DoFormat(const wxChar *format, ...)
+wxString wxString::DoFormat(const wxString& format, ...)
#endif
{
va_list argptr;
}
#ifdef wxNEEDS_WXSTRING_PRINTF_MIXIN
-int wxStringPrintfMixinBase::DoPrintf(const wxChar *format, ...)
+int wxStringPrintfMixinBase::DoPrintf(const wxString& format, ...)
#else
-int wxString::DoPrintf(const wxChar *format, ...)
+int wxString::DoPrintf(const wxString& format, ...)
#endif
{
va_list argptr;
return iLen;
}
-int wxString::PrintfV(const wxString& format, va_list argptr)
+#if wxUSE_UNICODE_UTF8
+template<typename BufferType>
+#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 )
{
}
// we could have overshot
- Shrink();
+ str.Shrink();
+
+ return str.length();
+}
- return length();
+int wxString::PrintfV(const wxString& format, va_list argptr)
+{
+ va_list argcopy;
+ wxVaCopy(argcopy, argptr);
+
+#if wxUSE_UNICODE_UTF8
+ #if wxUSE_STL_BASED_WXSTRING
+ typedef wxStringTypeBuffer<char> Utf8Buffer;
+ #else
+ typedef wxImplStringBuffer Utf8Buffer;
+ #endif
+#endif
+
+#if wxUSE_UTF8_LOCALE_ONLY
+ return DoStringPrintfV<Utf8Buffer>(*this, format, argcopy);
+#else
+ #if wxUSE_UNICODE_UTF8
+ if ( wxLocaleIsUtf8 )
+ return DoStringPrintfV<Utf8Buffer>(*this, format, argcopy);
+ else
+ // wxChar* version
+ return DoStringPrintfV<wxStringBuffer>(*this, format, argcopy);
+ #else
+ return DoStringPrintfV(*this, format, argcopy);
+ #endif // UTF8/WCHAR
+#endif
}
// ----------------------------------------------------------------------------
// 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
#else // !wxUSE_REGEX
// TODO: this is, of course, awfully inefficient...
+ // FIXME-UTF8: implement using iterators, remove #if
+#if wxUSE_UNICODE_UTF8
+ wxWCharBuffer maskBuf = mask.wc_str();
+ wxWCharBuffer 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;
// convert to lower case, return the copy of the string
wxString wxString::Lower() const { wxString s(*this); return s.MakeLower(); }
-
-// ============================================================================
-// 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
-
-// ctor
-void wxArrayString::Init(bool autoSort)
-{
- m_nSize =
- m_nCount = 0;
- m_pItems = 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 wxString[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;
- wxString *pNew = new wxString[m_nSize];
-
- // copy data to new location
- for ( size_t j = 0; j < m_nCount; j++ )
- pNew[j] = m_pItems[j];
-
- // delete old memory (but do not release the strings!)
- wxDELETEA(m_pItems);
-
- m_pItems = pNew;
- }
- }
-}
-
-// deletes all the strings from the list
-void wxArrayString::Empty()
-{
- m_nCount = 0;
-}
-
-// as Empty, but also frees memory
-void wxArrayString::Clear()
-{
- m_nSize =
- m_nCount = 0;
-
- wxDELETEA(m_pItems);
-}
-
-// dtor
-wxArrayString::~wxArrayString()
-{
- wxDELETEA(m_pItems);
-}
-
-void wxArrayString::reserve(size_t nSize)
-{
- Alloc(nSize);
-}
-
-// pre-allocates memory (frees the previous data!)
-void wxArrayString::Alloc(size_t nSize)
-{
- // only if old buffer was not big enough
- if ( nSize > m_nSize ) {
- wxString *pNew = new wxString[nSize];
- if ( !pNew )
- return;
-
- for ( size_t j = 0; j < m_nCount; j++ )
- pNew[j] = m_pItems[j];
- delete [] m_pItems;
-
- m_pItems = pNew;
- m_nSize = nSize;
- }
-}
-
-// 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
- wxString *pNew = new wxString[m_nCount];
-
- // copy data to new location
- for ( size_t j = 0; j < m_nCount; j++ )
- pNew[j] = m_pItems[j];
- delete [] m_pItems;
- m_pItems = pNew;
- }
-}
-
-// 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 ( m_pItems[--ui].IsSameAs(sz, bCase) )
- return ui;
- }
- while ( ui != 0 );
- }
- }
- else {
- for( size_t ui = 0; ui < m_nCount; ui++ ) {
- if( 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 {
- Grow(nInsert);
-
- for (size_t i = 0; i < nInsert; i++)
- {
- // just append
- m_pItems[m_nCount + i] = str;
- }
- 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)
-{
- 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);
-
- for (int j = m_nCount - nIndex - 1; j >= 0; j--)
- m_pItems[nIndex + nInsert + j] = m_pItems[nIndex + j];
-
- for (size_t i = 0; i < nInsert; i++)
- {
- m_pItems[nIndex + i] = 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++] = s;
-}
-
-// 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") );
-
- for ( size_t j = 0; j < m_nCount - nIndex -nRemove; j++)
- m_pItems[nIndex + j] = m_pItems[nIndex + nRemove + j];
-
- 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(wxString), (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") );
-
- qsort(m_pItems, m_nCount, sizeof(wxString), 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);
-}
-
-
-
-// ===========================================================================
-// wxJoin and wxSplit
-// ===========================================================================
-
-#include "wx/tokenzr.h"
-
-wxString wxJoin(const wxArrayString& arr, const wxChar sep, const wxChar escape)
-{
- size_t count = arr.size();
- if ( count == 0 )
- return wxEmptyString;
-
- wxString str;
-
- // pre-allocate memory using the estimation of the average length of the
- // strings in the given array: this is very imprecise, of course, but
- // better than nothing
- str.reserve(count*(arr[0].length() + arr[count-1].length()) / 2);
-
- if ( escape == wxT('\0') )
- {
- // escaping is disabled:
- for ( size_t i = 0; i < count; i++ )
- {
- if ( i )
- str += sep;
- str += arr[i];
- }
- }
- else // use escape character
- {
- for ( size_t n = 0; n < count; n++ )
- {
- if ( n )
- str += sep;
-
- for ( wxString::const_iterator i = arr[n].begin(),
- end = arr[n].end();
- i != end;
- ++i )
- {
- const wxChar ch = *i;
- if ( ch == sep )
- str += escape; // escape this separator
- str += ch;
- }
- }
- }
-
- str.Shrink(); // release extra memory if we allocated too much
- return str;
-}
-
-wxArrayString wxSplit(const wxString& str, const wxChar sep, const wxChar escape)
-{
- if ( escape == wxT('\0') )
- {
- // simple case: we don't need to honour the escape character
- return wxStringTokenize(str, sep, wxTOKEN_RET_EMPTY_ALL);
- }
-
- wxArrayString ret;
- wxString curr;
- wxChar prev = wxT('\0');
-
- for ( wxString::const_iterator i = str.begin(),
- end = str.end();
- i != end;
- ++i )
- {
- const wxChar ch = *i;
-
- if ( ch == sep )
- {
- if ( prev == escape )
- {
- // remove the escape character and don't consider this
- // occurrence of 'sep' as a real separator
- *curr.rbegin() = sep;
- }
- else // real separator
- {
- ret.push_back(curr);
- curr.clear();
- }
- }
- else // normal character
- {
- curr += ch;
- }
-
- prev = ch;
- }
-
- // add the last token
- if ( !curr.empty() || prev == sep )
- ret.Add(curr);
-
- return ret;
-}
projects / wxWidgets.git / blobdiff