class wxStreamBuffer
{
public:
+ /** BufMode flags */
+ enum BufMode
+ {
+ read,
+ write,
+ read_write
+ };
/**
Constructor, creates a new stream buffer using @a stream as a parent stream
Destructor.
It finalizes all IO calls and frees all internal buffers if necessary.
*/
- wxStreamBuffer();
+ ~wxStreamBuffer();
/**
Fill the IO buffer.
*/
wxOutputStream& Write(wxInputStream& stream_in);
+ /**
+ Writes exactly the specified number of bytes from the buffer.
+
+ Returns @true if exactly @a size bytes were written. Otherwise, returns
+ @false and LastWrite() should be used to retrieve the exact amount of
+ the data written if necessary.
+
+ This method uses repeated calls to Write() (which may return writing
+ only part of the data) if necessary.
+
+ @since 2.9.5
+ */
+ bool WriteAll(const void* buffer, size_t size);
+
protected:
/**
Internal function. It is called when the stream wants to write data of the
*/
wxInputStream& Read(wxOutputStream& stream_out);
+ /**
+ Reads exactly the specified number of bytes into the buffer.
+
+ Returns @true only if the entire amount of data was read, otherwise
+ @false is returned and the number of bytes really read can be retrieved
+ using LastRead(), as with Read().
+
+ This method uses repeated calls to Read() (which may return after
+ reading less than the requested number of bytes) if necessary.
+
+ @warning
+ The buffer absolutely needs to have at least the specified size.
+
+ @since 2.9.5
+ */
+ bool ReadAll(void* buffer, size_t size);
+
/**
Changes the stream current position.
virtual ~wxCountingOutputStream();
/**
- Returns the current size of the stream.
+ Returns the current length of the stream.
+
+ This is the amount of data written to the stream so far, in bytes.
*/
- size_t GetSize() const;
+ virtual wxFileOffset GetLength() const;
};
};
+/**
+ @class wxWrapperInputStream
+
+ A wrapper input stream is a kind of filter stream which forwards all the
+ operations to its base stream. This is useful to build utility classes such
+ as wxFSInputStream.
+
+ @note
+ The interface of this class is the same as that of wxInputStream.
+ Only a constructor differs and it is documented below.
+
+ @library{wxbase}
+ @category{streams}
+
+ @see wxFSInputStream, wxFilterInputStream
+ @since 2.9.4
+*/
+class wxWrapperInputStream : public wxFilterInputStream
+{
+public:
+ //@{
+ /**
+ Initializes a wrapper stream.
+
+ If the parent stream is passed as a pointer then the new wrapper stream
+ takes ownership of it. If it is passed by reference then it does not.
+ */
+ wxWrapperInputStream(wxInputStream& stream);
+ wxWrapperInputStream(wxInputStream* stream);
+ //@}
+
+protected:
+ /**
+ Default constructor, use InitParentStream() to finish initialization.
+
+ This constructor can be used by the derived classes from their own
+ constructors when the parent stream can't be specified immediately.
+ The derived class must call InitParentStream() later to do it.
+ */
+ wxWrapperInputStream();
+
+ //@{
+ /**
+ Set up the wrapped stream for an object initialized using the default
+ constructor.
+
+ The ownership logic is the same as for the non-default constructor,
+ i.e. this object takes ownership of the stream if it's passed by
+ pointer but not if it's passed by reference.
+ */
+ void InitParentStream(wxInputStream& stream);
+ void InitParentStream(wxInputStream* stream);
+ //@}
+};