Module: Advanced Tools Package: Streams
RWFilteredWCharInputStreamImp RWWCharInputStreamImp RWInputStreamImp RWStreamImp RWBodyBase
available() close() getSourceStream() |
isBad() isEof() isFail() |
isGood() read() readUntil() |
RWFilteredWCharInputStreamImp() skip() ~RWFilteredWCharInputStreamImp() |
#include <rw/stream/RWFilteredWCharInputStreamImp.h>
Abstract base class for all the filtered wide character input stream implementation classes. A filtered input stream is a stream that uses its attached input stream as the source of elements to its own functions. Implements the body idiom from the handle-body pattern.
RWFilteredWCharInputStreamImp(RWWCharInputStream&
sourceStream);
Used by derived classes to initialize the attached source stream.
Parameter List
sourceStream |
A handle to the attached source stream. |
virtual ~RWFilteredWCharInputStreamImp();
Destructor.
virtual RWSize available() const;
Returns the number of wide characters that can be read from the attached source stream without blocking. Throws no exceptions.
virtual void close();
Forwards the close() request to the attached source stream.
virtual bool isBad() const;
Forwards the isBad() request to the attached source stream. Throws no exceptions.
virtual bool isEof() const;
Forwards the isEof() request to the attached source stream. Throws no exceptions.
virtual bool isFail() const;
Forwards the isFail() request to the attached source stream. Throws no exceptions.
virtual bool isGood() const;
Forwards the isGood() request to the attached source stream. Throws no exceptions.
virtual wchar_t read();
Forwards the reading of a single wide character from the attached source stream.
virtual RWSize read(wchar_t* wcharArray, RWSize numWChars);
Forwards the reading of an array of wide characters from the attached source stream. The function returns the actual number of wide characters read.
Parameter List
wcharArray |
A pointer to the first element of the array. The array must have been pre-allocated to contain at least numWChars elements. |
numWChars |
The number of wide characters to be read from the stream. |
virtual RWSize readUntil(wchar_t* wcharArray, RWSize maxSize, wchar_t delim);
Reads wide characters from the attached source stream until the last wide character read is equal to delim, or maxSize wide characters have been read, or the end of the input sequence is reached. The wide characters read are stored in wcharArray. The function returns the actual number of wide characters read from the stream.
Parameter List
wcharArray |
A pointer to the array receiving the wide characters extracted from the stream. |
maxSize |
The maximum number of wide characters to be read. |
delim |
The wide character used as a delimiter. |
virtual RWSize skip(RWSize numUnits);
Skips numUnits wide characters from the input sequence of the attached source stream if possible. The function returns the actual number of wide characters skipped, which can be any value between 0 and numUnits.
Parameter List
numUnits |
The number of wide characters to be skipped. |
RWWCharInputStream& getSourceStream(); const RWWCharInputStream& getSourceStream() const;
These functions return a handle to the attached source stream. They throw no exceptions.
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