class SubReader

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acdk::io::SubReader Class Reference

#include <SubReader.h>

Inheritance diagram for acdk::io::SubReader:

List of all members.

Detailed Description

A SubReader is a filter, which reads a segement from another reader
API: ACDK.

Author:: Roger Rene Kommer (mailto:kommer@artefaktur.com)

Version:

Revision: 1.9

Date:

Date: 2005/02/05 10:44:54

Public Member Functions

SubReader (IN(RReader) in, int startoffset, int len)

int available ()

returns the number of bytes available in this stream before blocking Some Reader always return 0

jlong seek (::acdk::io::SeekPos seekrel, jlong seekpos)

jlong skip (jlong n)

Move forwart into the stream.

int read (byte *buffer, int offset, int len)

int read ()

read a single byte from stream

int read (IN(RbyteArray) buffer, int offset, int len)

read the len bytes into buffer at offset of the buffer

Private Attributes

int _start

int _length

int _curpos

Constructor & Destructor Documentation

acdk::io::SubReader::SubReader ( IN(RReader) in,

int startoffset,

int len

)

Member Function Documentation

int acdk::io::SubReader::available ( ) [virtual]

returns the number of bytes available in this stream before blocking Some Reader always return 0

Reimplemented from acdk::io::AbstractFilterReader.

int acdk::io::SubReader::read ( IN(RbyteArray) buffer,

int offset,

int len

) [inline, virtual]

read the len bytes into buffer at offset of the buffer

Parameters:

buffer where to write the bytes

offset offset to write into buffer

len how many bytes to read. if == -1 read into many bytes, that fits into buffer (buffer->length() - offset) ``

Returns:
number of bytes readed. may less than input if EOS is reached

Exceptions:

EOF exception, if trying to read behind EOS

Reimplemented from acdk::io::AbstractFilterReader.

int acdk::io::SubReader::read ( ) [inline, virtual]

read a single byte from stream

Returns:
the byte readed or -1 if EOS.

Exceptions:

EOF exception, if trying to read behind EOS

Reimplemented from acdk::io::AbstractFilterReader.

int acdk::io::SubReader::read ( byte * buffer,

int offset,

int len

) [virtual]

See also:
other read(RbyteArray, int, int)

Reimplemented from acdk::io::AbstractFilterReader.

jlong acdk::io::SubReader::seek ( ::acdk::io::SeekPos seekrel,

jlong seekpos

)

jlong acdk::io::SubReader::skip ( jlong n ) [virtual]

Move forwart into the stream.

Returns:
how many bytes skipped. May less then input, in case EOS is reached

Reimplemented from acdk::io::AbstractFilterReader.

Member Data Documentation

int acdk::io::SubReader::_curpos [private]

int acdk::io::SubReader::_length [private]

int acdk::io::SubReader::_start [private]