X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/6ea48c514e0b911113020c76fdb83b64f5941ddb..95dc31e001327d85048f5ab21498e4d3255831b2:/include/wx/stream.h diff --git a/include/wx/stream.h b/include/wx/stream.h index 2452244060..80c81bcbdc 100644 --- a/include/wx/stream.h +++ b/include/wx/stream.h @@ -21,9 +21,9 @@ #include "wx/string.h" #include "wx/filefn.h" // for wxFileOffset, wxInvalidOffset and wxSeekMode -class WXDLLIMPEXP_BASE wxStreamBase; -class WXDLLIMPEXP_BASE wxInputStream; -class WXDLLIMPEXP_BASE wxOutputStream; +class WXDLLIMPEXP_FWD_BASE wxStreamBase; +class WXDLLIMPEXP_FWD_BASE wxInputStream; +class WXDLLIMPEXP_FWD_BASE wxOutputStream; typedef wxInputStream& (*__wxInputManip)(wxInputStream&); typedef wxOutputStream& (*__wxOutputManip)(wxOutputStream&); @@ -52,7 +52,7 @@ const int wxEOF = -1; // wxStreamBase: common (but non virtual!) base for all stream classes // --------------------------------------------------------------------------- -class WXDLLIMPEXP_BASE wxStreamBase +class WXDLLIMPEXP_BASE wxStreamBase : public wxObject { public: wxStreamBase(); @@ -64,7 +64,7 @@ public: bool operator!() const { return !IsOk(); } // reset the stream state - void Reset() { m_lasterror = wxSTREAM_NO_ERROR; } + void Reset(wxStreamError error = wxSTREAM_NO_ERROR) { m_lasterror = error; } // this doesn't make sense for all streams, always test its return value virtual size_t GetSize() const; @@ -82,7 +82,8 @@ protected: friend class wxStreamBuffer; - DECLARE_NO_COPY_CLASS(wxStreamBase) + DECLARE_ABSTRACT_CLASS(wxStreamBase) + wxDECLARE_NO_COPY_CLASS(wxStreamBase); }; // ---------------------------------------------------------------------------- @@ -216,7 +217,8 @@ protected: friend class wxStreamBuffer; - DECLARE_NO_COPY_CLASS(wxInputStream) + DECLARE_ABSTRACT_CLASS(wxInputStream) + wxDECLARE_NO_COPY_CLASS(wxInputStream); }; // ---------------------------------------------------------------------------- @@ -251,7 +253,8 @@ protected: friend class wxStreamBuffer; - DECLARE_NO_COPY_CLASS(wxOutputStream) + DECLARE_ABSTRACT_CLASS(wxOutputStream) + wxDECLARE_NO_COPY_CLASS(wxOutputStream); }; // ============================================================================ @@ -278,7 +281,8 @@ protected: size_t m_currentPos; - DECLARE_NO_COPY_CLASS(wxCountingOutputStream) + DECLARE_DYNAMIC_CLASS(wxCountingOutputStream) + wxDECLARE_NO_COPY_CLASS(wxCountingOutputStream); }; // --------------------------------------------------------------------------- @@ -303,7 +307,8 @@ protected: wxInputStream *m_parent_i_stream; bool m_owns; - DECLARE_NO_COPY_CLASS(wxFilterInputStream) + DECLARE_ABSTRACT_CLASS(wxFilterInputStream) + wxDECLARE_NO_COPY_CLASS(wxFilterInputStream); }; class WXDLLIMPEXP_BASE wxFilterOutputStream : public wxOutputStream @@ -324,7 +329,8 @@ protected: wxOutputStream *m_parent_o_stream; bool m_owns; - DECLARE_NO_COPY_CLASS(wxFilterOutputStream) + DECLARE_ABSTRACT_CLASS(wxFilterOutputStream) + wxDECLARE_NO_COPY_CLASS(wxFilterOutputStream); }; enum wxStreamProtocolType @@ -348,12 +354,12 @@ public: virtual const wxChar * const *GetProtocols(wxStreamProtocolType type = wxSTREAM_PROTOCOL) const = 0; - bool CanHandle(const wxChar *protocol, + bool CanHandle(const wxString& protocol, wxStreamProtocolType type = wxSTREAM_PROTOCOL) const; protected: - wxString::size_type FindExtension(const wxChar *location) const; + wxString::size_type FindExtension(const wxString& location) const; DECLARE_ABSTRACT_CLASS(wxFilterClassFactoryBase) }; @@ -368,7 +374,7 @@ public: virtual wxFilterInputStream *NewStream(wxInputStream *stream) const = 0; virtual wxFilterOutputStream *NewStream(wxOutputStream *stream) const = 0; - static const wxFilterClassFactory *Find(const wxChar *protocol, + static const wxFilterClassFactory *Find(const wxString& protocol, wxStreamProtocolType type = wxSTREAM_PROTOCOL); @@ -410,7 +416,23 @@ public: read_write }; - wxStreamBuffer(wxStreamBase& stream, BufMode mode); + wxStreamBuffer(wxStreamBase& stream, BufMode mode) + { + InitWithStream(stream, mode); + } + + wxStreamBuffer(size_t bufsize, wxInputStream& stream) + { + InitWithStream(stream, read); + SetBufferIO(bufsize); + } + + wxStreamBuffer(size_t bufsize, wxOutputStream& stream) + { + InitWithStream(stream, write); + SetBufferIO(bufsize); + } + wxStreamBuffer(const wxStreamBuffer& buf); virtual ~wxStreamBuffer(); @@ -428,6 +450,7 @@ public: // Buffer control void ResetBuffer(); + void Truncate(); // NB: the buffer must always be allocated with malloc() if takeOwn is // true as it will be deallocated by free() @@ -437,7 +460,7 @@ public: void *GetBufferStart() const { return m_buffer_start; } void *GetBufferEnd() const { return m_buffer_end; } void *GetBufferPos() const { return m_buffer_pos; } - size_t GetBufferSize() const { return m_buffer_size; } + size_t GetBufferSize() const { return m_buffer_end - m_buffer_start; } size_t GetIntPosition() const { return m_buffer_pos - m_buffer_start; } void SetIntPosition(size_t pos) { m_buffer_pos = m_buffer_start + pos; } size_t GetLastAccess() const { return m_buffer_end - m_buffer_start; } @@ -452,7 +475,7 @@ public: // misc accessors wxStreamBase *GetStream() const { return m_stream; } - bool HasBuffer() const { return m_buffer_size != 0; } + bool HasBuffer() const { return m_buffer_start != m_buffer_end; } bool IsFixed() const { return m_fixed; } bool IsFlushable() const { return m_flushable; } @@ -480,6 +503,9 @@ protected: // common part of several ctors void Init(); + // common part of ctors taking wxStreamBase parameter + void InitWithStream(wxStreamBase& stream, BufMode mode); + // init buffer variables to be empty void InitBuffer(); @@ -492,10 +518,6 @@ protected: *m_buffer_end, *m_buffer_pos; - // the buffer size - // FIXME: isn't it the same as m_buffer_end - m_buffer_start? (VZ) - size_t m_buffer_size; - // the stream we're associated with wxStreamBase *m_stream; @@ -507,13 +529,8 @@ protected: m_fixed, m_flushable; -private: -// Cannot use -// DECLARE_NO_COPY_CLASS(wxStreamBuffer) -// because copy constructor is explicitly declared above; -// but no copy assignment operator is defined, so declare -// it private to prevent the compiler from defining it: - wxStreamBuffer& operator=(const wxStreamBuffer&); + + wxDECLARE_NO_ASSIGN_CLASS(wxStreamBuffer); }; // --------------------------------------------------------------------------- @@ -523,9 +540,19 @@ private: class WXDLLIMPEXP_BASE wxBufferedInputStream : public wxFilterInputStream { public: - // if a non NULL buffer is given to the stream, it will be deleted by it + // create a buffered stream on top of the specified low-level stream + // + // if a non NULL buffer is given to the stream, it will be deleted by it, + // otherwise a default 1KB buffer will be used wxBufferedInputStream(wxInputStream& stream, wxStreamBuffer *buffer = NULL); + + // ctor allowing to specify the buffer size, it's just a more convenient + // alternative to creating wxStreamBuffer, calling its SetBufferIO(bufsize) + // and using the ctor above + wxBufferedInputStream(wxInputStream& stream, size_t bufsize); + + virtual ~wxBufferedInputStream(); char Peek(); @@ -552,7 +579,7 @@ protected: wxStreamBuffer *m_i_streambuf; - DECLARE_NO_COPY_CLASS(wxBufferedInputStream) + wxDECLARE_NO_COPY_CLASS(wxBufferedInputStream); }; // ---------------------------------------------------------------------------- @@ -562,9 +589,18 @@ protected: class WXDLLIMPEXP_BASE wxBufferedOutputStream : public wxFilterOutputStream { public: - // if a non NULL buffer is given to the stream, it will be deleted by it + // create a buffered stream on top of the specified low-level stream + // + // if a non NULL buffer is given to the stream, it will be deleted by it, + // otherwise a default 1KB buffer will be used wxBufferedOutputStream(wxOutputStream& stream, wxStreamBuffer *buffer = NULL); + + // ctor allowing to specify the buffer size, it's just a more convenient + // alternative to creating wxStreamBuffer, calling its SetBufferIO(bufsize) + // and using the ctor above + wxBufferedOutputStream(wxOutputStream& stream, size_t bufsize); + virtual ~wxBufferedOutputStream(); wxOutputStream& Write(const void *buffer, size_t size); @@ -595,7 +631,7 @@ protected: wxStreamBuffer *m_o_streambuf; - DECLARE_NO_COPY_CLASS(wxBufferedOutputStream) + wxDECLARE_NO_COPY_CLASS(wxBufferedOutputStream); }; #if WXWIN_COMPATIBILITY_2_6 @@ -604,6 +640,54 @@ protected: inline wxStreamBuffer *wxBufferedOutputStream::OutputStreamBuffer() const { return m_o_streambuf; } #endif // WXWIN_COMPATIBILITY_2_6 +// --------------------------------------------------------------------------- +// wxWrapperInputStream: forwards all IO to another stream. +// --------------------------------------------------------------------------- + +class WXDLLIMPEXP_BASE wxWrapperInputStream : public wxFilterInputStream +{ +public: + // Constructor fully initializing the stream. The overload taking pointer + // takes ownership of the parent stream, the one taking reference does not. + // + // Notice that this class also has a default ctor but it's protected as the + // derived class is supposed to take care of calling InitParentStream() if + // it's used. + wxWrapperInputStream(wxInputStream& stream); + wxWrapperInputStream(wxInputStream* stream); + + // Override the base class methods to forward to the wrapped stream. + virtual wxFileOffset GetLength() const; + virtual bool IsSeekable() const; + +protected: + virtual size_t OnSysRead(void *buffer, size_t size); + virtual wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode); + virtual wxFileOffset OnSysTell() const; + + // Ensure that our own last error is the same as that of the real stream. + // + // This method is const because the error must be updated even from const + // methods (in other words, it really should have been mutable in the first + // place). + void SynchronizeLastError() const + { + const_cast(this)-> + Reset(m_parent_i_stream->GetLastError()); + } + + // Default constructor, use InitParentStream() later. + wxWrapperInputStream(); + + // Set up the wrapped stream for an object initialized using the default + // constructor. The ownership logic is the same as above. + void InitParentStream(wxInputStream& stream); + void InitParentStream(wxInputStream* stream); + + wxDECLARE_NO_COPY_CLASS(wxWrapperInputStream); +}; + + #endif // wxUSE_STREAMS #endif // _WX_WXSTREAM_H__