///////////////////////////////////////////////////////////////////////////// // Name: pyistream.h // Purpose: Classes for managing wxInputStream <--> Python streams // // Author: Robin Dunn // // Created: 25-Sept-2000 // RCS-ID: $Id$ // Copyright: (c) 2000 by Total Control Software // Licence: wxWindows license ///////////////////////////////////////////////////////////////////////////// #ifndef __PYISTREAM__ #define __PYISTREAM__ //--------------------------------------------------------------------------- // Handling of wxInputStreams by Joerg Baumann // See stream.i for implementations // C++ class wxPyInputStream to act as base for python class wxInputStream // You can use it in python like a python file object. class wxPyInputStream { public: // underlying wxInputStream wxInputStream* m_wxis; public: wxPyInputStream(wxInputStream* wxis) : m_wxis(wxis) {} ~wxPyInputStream(); // python file object interface for input files (most of it) void close(); void flush(); bool eof(); void seek(int offset, int whence=0); int tell(); PyObject* read(int size=-1); PyObject* readline(int size=-1); PyObject* readlines(int sizehint=-1); // do these later? //bool isatty(); //int fileno(); //void truncate(int size=-1); //PyObject* next(); // It's an input stream, can't write to it. //void write(wxString data); //void writelines(wxStringPtrList); // wxInputStream methods that may come in handy... char Peek() { if (m_wxis) return m_wxis->Peek(); else return -1; } char GetC() { if (m_wxis) return m_wxis->GetC(); else return -1; } size_t LastRead() { if (m_wxis) return m_wxis->LastRead(); else return 0; } bool CanRead() { if (m_wxis) return m_wxis->CanRead(); else return false; } bool Eof() { if (m_wxis) return m_wxis->Eof(); else return false; } bool Ungetch(char c) { if (m_wxis) return m_wxis->Ungetch(c); else return false; } unsigned long SeekI(unsigned long pos, wxSeekMode mode) { if (m_wxis) return m_wxis->SeekI(pos, mode); else return 0; } unsigned long TellI() { if (m_wxis) return m_wxis->TellI(); else return 0; } }; // This is a wxInputStream that wraps a Python file-like // object and calls the Python methods as needed. class wxPyCBInputStream : public wxInputStream { public: ~wxPyCBInputStream(); virtual wxFileOffset GetLength() const; // factory function static wxPyCBInputStream* create(PyObject *py, bool block=true); wxPyCBInputStream(const wxPyCBInputStream& other); protected: // can only be created via the factory wxPyCBInputStream(PyObject *r, PyObject *s, PyObject *t, bool block); // wxStreamBase methods virtual size_t OnSysRead(void *buffer, size_t bufsize); virtual size_t OnSysWrite(const void *buffer, size_t bufsize); virtual wxFileOffset OnSysSeek(wxFileOffset off, wxSeekMode mode); virtual wxFileOffset OnSysTell() const; virtual bool IsSeekable() const; PyObject* m_read; PyObject* m_seek; PyObject* m_tell; bool m_block; }; //--------------------------------------------------------------------------- // C++ class wxPyOutputStream to act as base for python class wxOutputStream // You can use it in python like a python file object. class wxPyOutputStream { public: // underlying wxOutputStream wxOutputStream* m_wxos; public: wxPyOutputStream(wxOutputStream* wxos) : m_wxos(wxos) {} ~wxPyOutputStream(); void close(); void flush(); bool eof(); void seek(int offset, int whence=0); int tell(); // it's an output stream, can't read from it. //PyObject* read(int size=-1); //PyObject* readline(int size=-1); //PyObject* readlines(int sizehint=-1); // do these later? //bool isatty(); //int fileno(); //void truncate(int size=-1); void write(PyObject* data); //void writelines(wxStringArray& arr); // wxOutputStream methods that may come in handy... void PutC(char c) { if (m_wxos) m_wxos->PutC(c); } size_t LastWrite() { if (m_wxos) return m_wxos->LastWrite(); else return 0; } unsigned long SeekO(unsigned long pos, wxSeekMode mode = wxFromStart) { if (m_wxos) return m_wxos->SeekO(pos, mode); else return 0; } unsigned long TellO() { if (m_wxos) return m_wxos->TellO(); else return 0; } }; // This is a wxOutputStream that wraps a Python file-like // object and calls the Python methods as needed. class wxPyCBOutputStream : public wxOutputStream { public: ~wxPyCBOutputStream(); virtual wxFileOffset GetLength() const; // factory function static wxPyCBOutputStream* create(PyObject *py, bool block=true); wxPyCBOutputStream(const wxPyCBOutputStream& other); protected: // can only be created via the factory wxPyCBOutputStream(PyObject *w, PyObject *s, PyObject *t, bool block); // wxStreamBase methods virtual size_t OnSysRead(void *buffer, size_t bufsize); virtual size_t OnSysWrite(const void *buffer, size_t bufsize); virtual wxFileOffset OnSysSeek(wxFileOffset off, wxSeekMode mode); virtual wxFileOffset OnSysTell() const; virtual bool IsSeekable() const; PyObject* m_write; PyObject* m_seek; PyObject* m_tell; bool m_block; }; //--------------------------------------------------------------------------- #endif