X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/a7ea63e21fda950c658a477d59d0818aab993fc9..bfa78c63b9045c2a594ca6f04dc26a70c21f5f42:/include/wx/stringimpl.h diff --git a/include/wx/stringimpl.h b/include/wx/stringimpl.h index bc95dbf025..674a3eb5f9 100644 --- a/include/wx/stringimpl.h +++ b/include/wx/stringimpl.h @@ -11,7 +11,7 @@ /* This header implements std::string-like string class, wxStringImpl, that is - used by wxString to store the data. Alternatively, if wxUSE_STL=1, + used by wxString to store the data. Alternatively, if wxUSE_STD_STRING=1, wxStringImpl is just a typedef to std:: string class. */ @@ -23,7 +23,10 @@ // ---------------------------------------------------------------------------- #include "wx/defs.h" // everybody should include this -#include "wx/wxchar.h" // for wxChar, wxStrlen() etc. +#include "wx/chartype.h" // for wxChar +#include "wx/wxcrtbase.h" // for wxStrlen() etc. + +#include // --------------------------------------------------------------------------- // macros @@ -31,7 +34,7 @@ // implementation only #define wxASSERT_VALID_INDEX(i) \ - wxASSERT_MSG( (size_t)(i) <= length(), _T("invalid index in wxString") ) + wxASSERT_MSG( (size_t)(i) <= length(), wxT("invalid index in wxString") ) // ---------------------------------------------------------------------------- @@ -40,13 +43,22 @@ // global pointer to empty string extern WXDLLIMPEXP_DATA_BASE(const wxChar*) wxEmptyString; +#if wxUSE_UNICODE_UTF8 +// FIXME-UTF8: we should have only one wxEmptyString +extern WXDLLIMPEXP_DATA_BASE(const wxStringCharType*) wxEmptyStringImpl; +#endif // ---------------------------------------------------------------------------- -// deal with STL/non-STL/non-STL-but-wxUSE_STD_STRING +// deal with various build options // ---------------------------------------------------------------------------- -#define wxUSE_STL_BASED_WXSTRING wxUSE_STL +// we use STL-based string internally if we use std::string at all now, there +// should be no reason to prefer our internal implement but if you really need +// it you can predefine wxUSE_STL_BASED_WXSTRING as 0 when building the library +#ifndef wxUSE_STL_BASED_WXSTRING + #define wxUSE_STL_BASED_WXSTRING wxUSE_STD_STRING +#endif // in both cases we need to define wxStdString #if wxUSE_STL_BASED_WXSTRING || wxUSE_STD_STRING @@ -55,17 +67,20 @@ extern WXDLLIMPEXP_DATA_BASE(const wxChar*) wxEmptyString; #include #include "wx/afterstd.h" +#ifdef HAVE_STD_WSTRING + typedef std::wstring wxStdWideString; +#else + typedef std::basic_string wxStdWideString; +#endif + #if wxUSE_UNICODE_WCHAR - #ifdef HAVE_STD_WSTRING - typedef std::wstring wxStdString; - #else - typedef std::basic_string wxStdString; - #endif + typedef wxStdWideString wxStdString; #else typedef std::string wxStdString; #endif -#endif // need +#endif // wxUSE_STL_BASED_WXSTRING || wxUSE_STD_STRING + #if wxUSE_STL_BASED_WXSTRING @@ -73,8 +88,10 @@ extern WXDLLIMPEXP_DATA_BASE(const wxChar*) wxEmptyString; #undef wxUSE_STD_STRING #define wxUSE_STD_STRING 1 + // the versions of std::string included with gcc 2.95 and VC6 (for which + // _MSC_VER == 1200) and eVC4 (_MSC_VER == 1201) lack clear() method #if (defined(__GNUG__) && (__GNUG__ < 3)) || \ - (defined(_MSC_VER) && (_MSC_VER <= 1200)) + !wxCHECK_VISUALC_VERSION(7) || defined(__EVC4__) #define wxSTRING_BASE_HASNT_CLEAR #endif @@ -95,8 +112,8 @@ struct WXDLLIMPEXP_BASE wxStringData size_t nDataLength, // actual string length nAllocLength; // allocated memory size - // mimics declaration 'wxChar data[nAllocLength]' - wxChar* data() const { return (wxChar*)(this + 1); } + // mimics declaration 'wxStringCharType data[nAllocLength]' + wxStringCharType* data() const { return (wxStringCharType*)(this + 1); } // empty string has a special ref count so it's never deleted bool IsEmpty() const { return (nRefs == -1); } @@ -141,7 +158,11 @@ protected: // string (re)initialization functions // initializes the string to the empty value (must be called only from // ctors, use Reinit() otherwise) +#if wxUSE_UNICODE_UTF8 + void Init() { m_pchData = (wxStringCharType *)wxEmptyStringImpl; } // FIXME-UTF8 +#else void Init() { m_pchData = (wxStringCharType *)wxEmptyString; } +#endif // initializes the string with (a part of) C-string void InitWith(const wxStringCharType *psz, size_t nPos = 0, size_t nLen = npos); // as Init, but also frees old data @@ -175,8 +196,96 @@ public: typedef const value_type& const_reference; typedef value_type* pointer; typedef const value_type* const_pointer; - typedef value_type *iterator; - typedef const value_type *const_iterator; + + // macro to define the bulk of iterator and const_iterator classes + #define WX_DEFINE_STRINGIMPL_ITERATOR(iterator_name, ref_type, ptr_type) \ + public: \ + typedef wxStringCharType value_type; \ + typedef ref_type reference; \ + typedef ptr_type pointer; \ + typedef int difference_type; \ + \ + iterator_name() : m_ptr(NULL) { } \ + iterator_name(pointer ptr) : m_ptr(ptr) { } \ + \ + reference operator*() const { return *m_ptr; } \ + \ + iterator_name& operator++() { m_ptr++; return *this; } \ + iterator_name operator++(int) \ + { \ + const iterator_name tmp(*this); \ + m_ptr++; \ + return tmp; \ + } \ + \ + iterator_name& operator--() { m_ptr--; return *this; } \ + iterator_name operator--(int) \ + { \ + const iterator_name tmp(*this); \ + m_ptr--; \ + return tmp; \ + } \ + \ + iterator_name operator+(ptrdiff_t n) const \ + { return iterator_name(m_ptr + n); } \ + iterator_name operator-(ptrdiff_t n) const \ + { return iterator_name(m_ptr - n); } \ + iterator_name& operator+=(ptrdiff_t n) \ + { m_ptr += n; return *this; } \ + iterator_name& operator-=(ptrdiff_t n) \ + { m_ptr -= n; return *this; } \ + \ + difference_type operator-(const iterator_name& i) const \ + { return m_ptr - i.m_ptr; } \ + \ + bool operator==(const iterator_name& i) const \ + { return m_ptr == i.m_ptr; } \ + bool operator!=(const iterator_name& i) const \ + { return m_ptr != i.m_ptr; } \ + \ + bool operator<(const iterator_name& i) const \ + { return m_ptr < i.m_ptr; } \ + bool operator>(const iterator_name& i) const \ + { return m_ptr > i.m_ptr; } \ + bool operator<=(const iterator_name& i) const \ + { return m_ptr <= i.m_ptr; } \ + bool operator>=(const iterator_name& i) const \ + { return m_ptr >= i.m_ptr; } \ + \ + private: \ + /* for wxStringImpl use only */ \ + pointer GetPtr() const { return m_ptr; } \ + \ + friend class wxStringImpl; \ + \ + pointer m_ptr + + // we need to declare const_iterator in wxStringImpl scope, the friend + // declaration inside iterator class itself is not enough, or at least not + // for g++ 3.4 (g++ 4 is ok) + class WXDLLIMPEXP_FWD_BASE const_iterator; + + class WXDLLIMPEXP_BASE iterator + { + WX_DEFINE_STRINGIMPL_ITERATOR(iterator, + wxStringCharType&, + wxStringCharType*); + + friend class const_iterator; + }; + + class WXDLLIMPEXP_BASE const_iterator + { + public: + const_iterator(iterator i) : m_ptr(i.m_ptr) { } + + WX_DEFINE_STRINGIMPL_ITERATOR(const_iterator, + const wxStringCharType&, + const wxStringCharType*); + }; + + #undef WX_DEFINE_STRINGIMPL_ITERATOR + // constructors and destructor // ctor for an empty string @@ -185,7 +294,7 @@ public: wxStringImpl(const wxStringImpl& stringSrc) { wxASSERT_MSG( stringSrc.GetStringData()->IsValid(), - _T("did you forget to call UngetWriteBuf()?") ); + wxT("did you forget to call UngetWriteBuf()?") ); if ( stringSrc.empty() ) { // nothing to do for an empty string @@ -208,30 +317,42 @@ public: wxStringImpl(const wxStringImpl& str, size_t nPos, size_t nLen) { wxASSERT_MSG( str.GetStringData()->IsValid(), - _T("did you forget to call UngetWriteBuf()?") ); + wxT("did you forget to call UngetWriteBuf()?") ); Init(); size_t strLen = str.length() - nPos; nLen = strLen < nLen ? strLen : nLen; InitWith(str.c_str(), nPos, nLen); } - // take all characters from pStart to pEnd - wxStringImpl(const void *pStart, const void *pEnd); + // take everything between start and end + wxStringImpl(const_iterator start, const_iterator end); + + + // ctor from and conversion to std::string +#if wxUSE_STD_STRING + wxStringImpl(const wxStdString& impl) + { InitWith(impl.c_str(), 0, impl.length()); } + + operator wxStdString() const + { return wxStdString(c_str(), length()); } +#endif - // dtor is not virtual, this class must not be inherited from! - ~wxStringImpl() - { #if defined(__VISUALC__) && (__VISUALC__ >= 1200) - //RN - according to the above VC++ does indeed inline this, - //even though it spits out two warnings - #pragma warning (disable:4714) + // disable warning about Unlock() below not being inlined (first, it + // seems to be inlined nevertheless and second, even if it isn't, there + // is nothing we can do about this + #pragma warning(push) + #pragma warning (disable:4714) #endif + // dtor is not virtual, this class must not be inherited from! + ~wxStringImpl() + { GetStringData()->Unlock(); } #if defined(__VISUALC__) && (__VISUALC__ >= 1200) - //re-enable inlining warning - #pragma warning (default:4714) + #pragma warning(pop) #endif + // overloaded assignment // from another wxString wxStringImpl& operator=(const wxStringImpl& stringSrc); @@ -258,9 +379,11 @@ public: // lib.string.access // return the character at position n + value_type operator[](size_type n) const { return m_pchData[n]; } value_type at(size_type n) const { wxASSERT_VALID_INDEX( n ); return m_pchData[n]; } // returns the writable character at position n + reference operator[](size_type n) { CopyBeforeWrite(); return m_pchData[n]; } reference at(size_type n) { wxASSERT_VALID_INDEX( n ); @@ -288,25 +411,25 @@ public: wxStringImpl& append(size_t n, wxStringCharType ch); // append from first to last wxStringImpl& append(const_iterator first, const_iterator last) - { ConcatSelf(last - first, first); return *this; } + { ConcatSelf(last - first, first.GetPtr()); return *this; } // same as `this_string = str' wxStringImpl& assign(const wxStringImpl& str) { return *this = str; } // same as ` = str[pos..pos + n] wxStringImpl& assign(const wxStringImpl& str, size_t pos, size_t n) - { clear(); return append(str, pos, n); } + { return replace(0, npos, str, pos, n); } // same as `= first n (or all if n == npos) characters of sz' wxStringImpl& assign(const wxStringCharType *sz) - { clear(); return append(sz, wxStrlen(sz)); } + { return replace(0, npos, sz, wxStrlen(sz)); } wxStringImpl& assign(const wxStringCharType *sz, size_t n) - { clear(); return append(sz, n); } + { return replace(0, npos, sz, n); } // same as `= n copies of ch' wxStringImpl& assign(size_t n, wxStringCharType ch) - { clear(); return append(n, ch); } + { return replace(0, npos, n, ch); } // assign from first to last wxStringImpl& assign(const_iterator first, const_iterator last) - { clear(); return append(first, last); } + { return replace(begin(), end(), first, last); } // first valid index position const_iterator begin() const { return m_pchData; } @@ -333,12 +456,12 @@ public: // insert first n (or all if n == npos) characters of sz wxStringImpl& insert(size_t nPos, const wxStringCharType *sz, size_t n = npos); // insert n copies of ch - wxStringImpl& insert(size_t nPos, size_t n, wxStringCharType ch)// FIXME-UTF8: tricky + wxStringImpl& insert(size_t nPos, size_t n, wxStringCharType ch) { return insert(nPos, wxStringImpl(n, ch)); } - iterator insert(iterator it, wxStringCharType ch) // FIXME-UTF8: tricky + iterator insert(iterator it, wxStringCharType ch) { size_t idx = it - begin(); insert(idx, 1, ch); return begin() + idx; } void insert(iterator it, const_iterator first, const_iterator last) - { insert(it - begin(), first, last - first); } + { insert(it - begin(), first.GetPtr(), last - first); } void insert(iterator it, size_type n, wxStringCharType ch) { insert(it - begin(), n, ch); } @@ -357,18 +480,23 @@ public: const wxStringCharType* data() const { return m_pchData; } // replaces the substring of length nLen starting at nStart - wxStringImpl& replace(size_t nStart, size_t nLen, const wxStringCharType* sz); + wxStringImpl& replace(size_t nStart, size_t nLen, const wxStringCharType* sz) + { return replace(nStart, nLen, sz, npos); } // replaces the substring of length nLen starting at nStart wxStringImpl& replace(size_t nStart, size_t nLen, const wxStringImpl& str) - { return replace(nStart, nLen, str.c_str()); } + { return replace(nStart, nLen, str.c_str(), str.length()); } // replaces the substring with nCount copies of ch - wxStringImpl& replace(size_t nStart, size_t nLen, size_t nCount, wxStringCharType ch); + wxStringImpl& replace(size_t nStart, size_t nLen, + size_t nCount, wxStringCharType ch) + { return replace(nStart, nLen, wxStringImpl(nCount, ch)); } // replaces a substring with another substring wxStringImpl& replace(size_t nStart, size_t nLen, - const wxStringImpl& str, size_t nStart2, size_t nLen2); + const wxStringImpl& str, size_t nStart2, size_t nLen2) + { return replace(nStart, nLen, str.substr(nStart2, nLen2)); } // replaces the substring with first nCount chars of sz wxStringImpl& replace(size_t nStart, size_t nLen, const wxStringCharType* sz, size_t nCount); + wxStringImpl& replace(iterator first, iterator last, const_pointer s) { return replace(first - begin(), last - first, s); } wxStringImpl& replace(iterator first, iterator last, const_pointer s, @@ -380,7 +508,7 @@ public: { return replace(first - begin(), last - first, n, c); } wxStringImpl& replace(iterator first, iterator last, const_iterator first1, const_iterator last1) - { return replace(first - begin(), last - first, first1, last1 - first1); } + { return replace(first - begin(), last - first, first1.GetPtr(), last1 - first1); } // swap two strings void swap(wxStringImpl& str); @@ -395,7 +523,7 @@ public: // find first n characters of sz size_t find(const wxStringCharType* sz, size_t nStart = 0, size_t n = npos) const; - // find the first occurence of character ch after nStart + // find the first occurrence of character ch after nStart size_t find(wxStringCharType ch, size_t nStart = 0) const; // rfind() family is exactly like find() but works right to left @@ -421,14 +549,12 @@ public: // string += char wxStringImpl& operator+=(wxStringCharType ch) { return append(1, ch); } -#if !wxUSE_UNICODE_UTF8 // helpers for wxStringBuffer and wxStringBufferLength wxStringCharType *DoGetWriteBuf(size_t nLen); void DoUngetWriteBuf(); void DoUngetWriteBuf(size_t nLen); -#endif - friend class WXDLLIMPEXP_BASE wxString; + friend class WXDLLIMPEXP_FWD_BASE wxString; }; #endif // !wxUSE_STL_BASED_WXSTRING