package_diagram filter_stream::filter_stream filter_stream core core filter_stream::filter_stream->core a_star-m a_star-m a_star-m->filter_stream::filter_stream

Ancestors

module abstract_collection

core :: abstract_collection

Abstract collection classes and services.
module abstract_text

core :: abstract_text

Abstract class for manipulation of sequences of characters
module array

core :: array

This module introduces the standard array structure.
module bitset

core :: bitset

Services to handle BitSet
module bytes

core :: bytes

Services for byte streams and arrays
module circular_array

core :: circular_array

Efficient data structure to access both end of the sequence.
module codec_base

core :: codec_base

Base for codecs to use with streams
module codecs

core :: codecs

Group module for all codec-related manipulations
module collection

core :: collection

This module define several collection classes.
module environ

core :: environ

Access to the environment variables of the process
module error

core :: error

Standard error-management infrastructure.
module exec

core :: exec

Invocation and management of operating system sub-processes.
module file

core :: file

File manipulations (create, read, write, etc.)
module fixed_ints

core :: fixed_ints

Basic integers of fixed-precision
module fixed_ints_text

core :: fixed_ints_text

Text services to complement fixed_ints
module flat

core :: flat

All the array-based text representations
module gc

core :: gc

Access to the Nit internal garbage collection mechanism
module hash_collection

core :: hash_collection

Introduce HashMap and HashSet.
module iso8859_1

core :: iso8859_1

Codec for ISO8859-1 I/O
module kernel

core :: kernel

Most basic classes and methods.
module list

core :: list

This module handle double linked lists
module math

core :: math

Mathematical operations
module native

core :: native

Native structures for text and bytes
module numeric

core :: numeric

Advanced services for Numeric types
module protocol

core :: protocol

module queue

core :: queue

Queuing data structures and wrappers
module range

core :: range

Module for range of discrete objects.
module re

core :: re

Regular expression support for all services based on Pattern
module ropes

core :: ropes

Tree-based representation of a String.
module sorter

core :: sorter

This module contains classes used to compare things and sorts arrays.
module stream

core :: stream

Input and output streams of characters
module text

core :: text

All the classes and methods related to the manipulation of text entities
module time

core :: time

Management of time and dates
module union_find

core :: union_find

union–find algorithm using an efficient disjoint-set data structure
module utf8

core :: utf8

Codec for UTF-8 I/O

Parents

module core

core :: core

Standard classes and methods used by default by Nit programs and libraries.

Children

module a_star-m

a_star-m

class FilterReader
	super Reader
	# Filter readed elements
	var stream: nullable Reader = null

	redef fun eof: Bool
	do
		assert stream != null
		return stream.eof
	end
end

class FilterWriter
	super Writer
	# Filter outputed elements
	var stream: nullable Writer = null

	# Can the stream be used to write
	redef fun is_writable: Bool
	do
		assert stream != null
		return stream.is_writable
	end
end

class StreamCat
	super FilterReader
	private var streams: Iterator[Reader]

	redef fun eof: Bool
	do
		if stream == null then
			return true
		else if stream.eof then
			stream.close
			stream = null
			return eof
		else
			return false
		end
	end

	redef fun stream: nullable Reader
	do
		var res = super
		if res == null and _streams.is_ok then
			res = _streams.item
			stream = res
			assert stream != null
			_streams.next
		end
		return res
	end

	redef fun read_char
	do
		assert not eof
		return stream.read_char
	end

	redef fun close
	do
		while stream != null do
			stream.close
			stream = null
		end
	end

	init with_streams(streams: Array[Reader])
	do
		_streams = streams.iterator
	end

	init(streams: Reader ...) is old_style_init do
		_streams = streams.iterator
	end
end

class StreamDemux
	super FilterWriter
	private var streams: Array[Writer]

	redef fun is_writable: Bool
	do
		if stream.is_writable then
			return true
		else
			for i in _streams
			do
				if i.is_writable then
					return true
				end
			end
			return false
		end
	end

	redef fun write(s: Text)
	do
		for i in _streams
		do
			stream = i
			if stream.is_writable then
				stream.write(s)
			end
		end
	end

	redef fun close
	do
		for i in _streams
		do
			stream = i
			stream.close
		end
	end

	init with_streams(streams: Array[Writer])
	do
		_streams = streams
	end

	init(streams: Writer ...) is old_style_init do
		_streams = streams
	end
end
lib/filter_stream/filter_stream.nit:14,1--139,3