Class: Archive::Writer

Inherits:
BaseArchive show all
Defined in:
lib/ffi-libarchive/writer.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from BaseArchive

#close, #errno, #error_string, finalizer

Constructor Details

#initialize(params = {}) ⇒ Writer

Returns a new instance of Writer.



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# File 'lib/ffi-libarchive/writer.rb', line 34

def initialize(params = {})
  super C.method(:archive_write_new), C.method(:archive_write_finish)

  compression = params[:compression]
  case compression
  when Symbol
    compression = Archive.const_get("COMPRESSION_#{compression.to_s.upcase}".to_sym)
  end

  format = params[:format]
  case format
  when Symbol
    format = Archive.const_get("FORMAT_#{format.to_s.upcase}".to_sym)
  end

  raise Error, @archive if C.archive_write_set_compression(archive, compression) != C::OK

  raise Error, @archive if C.archive_write_set_format(archive, format) != C::OK

  if params[:file_name]
    raise Error, @archive if C.archive_write_open_filename(archive, params[:file_name]) != C::OK
  elsif params[:memory]
    if C.archive_write_get_bytes_in_last_block(@archive) == -1
      C.archive_write_set_bytes_in_last_block(archive, 1)
    end
    @data = write_callback params[:memory]
    raise Error, @archive if C.archive_write_open(archive, nil,
      nil,
      @data,
      nil) != C::OK
  end
rescue
  close
  raise
end

Class Method Details

.open_filename(file_name, compression, format) ⇒ Object 



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# File 'lib/ffi-libarchive/writer.rb', line 5

def self.open_filename(file_name, compression, format)
  if block_given?
    writer = open_filename file_name, compression, format
    begin
      yield writer
    ensure
      writer.close
    end
  else
    new file_name: file_name, compression: compression, format: format
  end
end

.open_memory(string, compression, format) ⇒ Object 



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# File 'lib/ffi-libarchive/writer.rb', line 18

def self.open_memory(string, compression, format)
  if block_given?
    writer = open_memory string, compression, format
    begin
      yield writer
    ensure
      writer.close
    end
  else
    if compression.is_a? String
      compression = -1
    end
    new memory: string, compression: compression, format: format
  end
end

Instance Method Details

#add_entry ⇒ Object 



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# File 'lib/ffi-libarchive/writer.rb', line 92

def add_entry
  raise ArgumentError, "No block given" unless block_given?

  entry = Entry.new
  data = yield entry
  if data
    entry.size = data.bytesize
    write_header entry
    write_data data
  else
    write_header entry
  end
  nil
ensure
  entry.close
end

#new_entry ⇒ Object 



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# File 'lib/ffi-libarchive/writer.rb', line 78

def new_entry
  entry = Entry.new
  if block_given?
    begin
      result = yield entry
    ensure
      entry.close
    end
    result
  else
    entry
  end
end

#write_data(*args) ⇒ Object 



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# File 'lib/ffi-libarchive/writer.rb', line 109

def write_data(*args)
  if block_given?
    raise ArgumentError, "wrong number of argument (#{args.size} for 0)" if args.size > 0

    ar = archive
    len = 0
    loop do
      str = yield
      if (n = C.archive_write_data(ar, str, str.bytesize)) < 1
        return len
      end

      len += n
    end
  else
    raise ArgumentError, "wrong number of argument (#{args.size}) for 1)" if args.size != 1

    str = args[0]
    C.archive_write_data(archive, str, str.bytesize)
  end
end

#write_header(entry) ⇒ Object

Raises:



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# File 'lib/ffi-libarchive/writer.rb', line 131

def write_header(entry)
  raise Error, @archive if C.archive_write_header(archive, entry.entry) != C::OK
end