RWFilteredCharInputStreamImp

Module:  Advanced Tools   Package:  Streams

RWFilteredCharInputStreamImp  RWCharInputStreamImp  
    RWInputStreamImp  RWStreamImp  RWBodyBase

• Local Index
• Header File
• Description
• Protected Constructor
• Public Destructor
• Public Member Functions
• Protected Member Functions

Members

available() close() getSourceStream()

isBad() isEof() isFail()

isGood() read() readUntil()

RWFilteredCharInputStreamImp() skip() ~RWFilteredCharInputStreamImp()

#include <rw/stream/RWFilteredCharInputStreamImp.h>

Abstract base class for all the filtered narrow 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.

RWFilteredCharInputStreamImp(RWCharInputStream& sourceStream);

Used by derived classes to initialize the attached source stream.

Parameter List

sourceStream

A handle to the attached source stream.

virtual 
~RWFilteredCharInputStreamImp();

Destructor.

virtual RWSize 
available() const;

Returns the number of narrow 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 char 
read();

Forwards the reading of a single narrow character from the attached source stream.

virtual RWSize 
read(char* charArray, RWSize numChars);

Forwards the reading of an array of narrow characters from the attached source stream. The function returns the actual number of narrow characters read.

Parameter List

charArray	A pointer to the first element of the array. The array must have been pre-allocated to contain at least numChars elements.
numChars	The number of narrow characters to be read from the stream.

virtual void 
readUntil(RWCString& string, char delim);

Reads narrow characters from the attached source stream until the last character read is equal to delim, or the end of the input sequence is reached. The narrow characters read are stored in a narrow string object.

Parameter List

string	A string object receiving the narrow characters extracted from the stream.
delim	The narrow character used as a delimiter.

virtual RWSize 
skip(RWSize numUnits);

Skips numUnits narrow characters from the input sequence of the attached source stream if possible. The function returns the actual number of narrow characters skipped, which can be any value between 0 and numUnits.

Parameter List

numUnits

The number of narrow characters to be skipped.

RWCharInputStream& 
getSourceStream();

const RWCharInputStream& 
getSourceStream() const;

These functions return a handle to the attached source stream. They throw no exceptions.

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