Class: RDF::Raptor::FFI::V2::IOStreamHandler

Inherits:
FFI::Struct
  • Object
show all
Includes:
RDF::Raptor::FFI
Defined in:
lib/rdf/raptor/ffi/v2/iostream_handler.rb

Overview

See Also:

Constant Summary collapse

HANDLERS = 
[:init, :finish, :write_byte, :write_bytes, :read_bytes, :read_eof]

Constants included from RDF::Raptor::FFI

ENGINE

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from RDF::Raptor::FFI

#version

Constructor Details

#initialize(ptr) ⇒ IOStreamHandler #initialize(io) ⇒ IOStreamHandler

Returns a new instance of IOStreamHandler.

Overloads:



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# File 'lib/rdf/raptor/ffi/v2/iostream_handler.rb', line 30

def initialize(ptr_or_io = nil)
  if ptr_or_io.respond_to?(:write)
    @io = ptr_or_io
    super()
  else
    case ptr_or_io
    when FFI::Pointer
      super(ptr_or_io)
    when nil
      super()
    else
      raise ArgumentError, "invalid argument: #{ptr_or_io.inspect}"
    end
  end
  initialize!
end

Instance Attribute Details

#io ⇒ IO

The IO object to operate upon.

Returns:

  • (IO) 


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# File 'lib/rdf/raptor/ffi/v2/iostream_handler.rb', line 21

def io
  @io
end

Instance Method Details

#define_handler(name, &block)

This method returns an undefined value.

Parameters:

  • name (Symbol, #to_sym)

Raises:

  • (ArgumentError) 


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# File 'lib/rdf/raptor/ffi/v2/iostream_handler.rb', line 146

def define_handler(name, &block)
  name = name.to_sym
  raise ArgumentError, "invalid IOStreamHandler function name: #{name}" unless HANDLERS.include?(name)
  @procs ||= {} # prevents premature GC of the procs
  @procs[name] = self[name] = block
end

#finish_handler=(func) Also known as: finish=

This method returns an undefined value.

Parameters:

  • func (Proc) 


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# File 'lib/rdf/raptor/ffi/v2/iostream_handler.rb', line 98

def finish_handler=(func)
  define_handler(:finish, &func)
end

#init_handler=(func) Also known as: init=

This method returns an undefined value.

Parameters:

  • func (Proc) 


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# File 'lib/rdf/raptor/ffi/v2/iostream_handler.rb', line 90

def init_handler=(func)
  define_handler(:init, &func)
end

#initialize!

This method returns an undefined value.



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# File 'lib/rdf/raptor/ffi/v2/iostream_handler.rb', line 49

def initialize!
  self[:version] = 2

  #define_handler(:init) do |context|
  #  $stderr.puts("#{self.class}: init")
  #end
  #define_handler(:finish) do |context|
  #  $stderr.puts("#{self.class}: finish")
  #end
  define_handler(:write_byte) do |context, byte|
    begin
      @io.putc(byte)
      0
    rescue => e
      $stderr.puts("#{e} in #{self.class}#write_byte")
      1
    end
  end
  define_handler(:write_bytes) do |context, data, size, nmemb|
    begin
      @io.write(data.read_string(size * nmemb))
      0
    rescue => e
      $stderr.puts("#{e} in #{self.class}#write_bytes")
      1
    end
  end
  #define_handler(:write_end) do |context|
  #  $stderr.puts("#{self.class}: write_end")
  #end
  #define_handler(:read_bytes) do |context, data, size, nmemb|
  #  $stderr.puts("#{self.class}: read_bytes")
  #end
  #define_handler(:read_eof) do |context|
  #  $stderr.puts("#{self.class}: read_eof")
  #end
end

#read_bytes_handler=(func) Also known as: read_bytes=

This method returns an undefined value.

Parameters:

  • func (Proc) 


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# File 'lib/rdf/raptor/ffi/v2/iostream_handler.rb', line 130

def read_bytes_handler=(func)
  define_handler(:read_bytes, &func)
end

#read_eof_handler=(func) Also known as: read_eof=

This method returns an undefined value.

Parameters:

  • func (Proc) 


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# File 'lib/rdf/raptor/ffi/v2/iostream_handler.rb', line 138

def read_eof_handler=(func)
  define_handler(:read_eof, &func)
end

#write_byte_handler=(func) Also known as: write_byte=

This method returns an undefined value.

Parameters:

  • func (Proc) 


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# File 'lib/rdf/raptor/ffi/v2/iostream_handler.rb', line 106

def write_byte_handler=(func)
  define_handler(:write_byte, &func)
end

#write_bytes_handler=(func) Also known as: write_bytes=

This method returns an undefined value.

Parameters:

  • func (Proc) 


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# File 'lib/rdf/raptor/ffi/v2/iostream_handler.rb', line 114

def write_bytes_handler=(func)
  define_handler(:write_bytes, &func)
end

#write_end_handler=(func) Also known as: write_end=

This method returns an undefined value.

Parameters:

  • func (Proc) 


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# File 'lib/rdf/raptor/ffi/v2/iostream_handler.rb', line 122

def write_end_handler=(func)
  define_handler(:write_end, &func)
end