Fresh start

1 files changed, 147 insertions, 0 deletions

diff --git a/jni/ruby/lib/rubygems/package/tar_reader/entry.rb b/jni/ruby/lib/rubygems/package/tar_reader/entry.rb
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+++ b/jni/ruby/lib/rubygems/package/tar_reader/entry.rb
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+# -*- coding: utf-8 -*-
+#++
+# Copyright (C) 2004 Mauricio Julio Fernández Pradier
+# See LICENSE.txt for additional licensing information.
+#--
+
+##
+# Class for reading entries out of a tar file
+
+class Gem::Package::TarReader::Entry
+
+  ##
+  # Header for this tar entry
+
+  attr_reader :header
+
+  ##
+  # Creates a new tar entry for +header+ that will be read from +io+
+
+  def initialize(header, io)
+    @closed = false
+    @header = header
+    @io = io
+    @orig_pos = @io.pos
+    @read = 0
+  end
+
+  def check_closed # :nodoc:
+    raise IOError, "closed #{self.class}" if closed?
+  end
+
+  ##
+  # Number of bytes read out of the tar entry
+
+  def bytes_read
+    @read
+  end
+
+  ##
+  # Closes the tar entry
+
+  def close
+    @closed = true
+  end
+
+  ##
+  # Is the tar entry closed?
+
+  def closed?
+    @closed
+  end
+
+  ##
+  # Are we at the end of the tar entry?
+
+  def eof?
+    check_closed
+
+    @read >= @header.size
+  end
+
+  ##
+  # Full name of the tar entry
+
+  def full_name
+    if @header.prefix != "" then
+      File.join @header.prefix, @header.name
+    else
+      @header.name
+    end
+  rescue ArgumentError => e
+    raise unless e.message == 'string contains null byte'
+    raise Gem::Package::TarInvalidError,
+          'tar is corrupt, name contains null byte'
+  end
+
+  ##
+  # Read one byte from the tar entry
+
+  def getc
+    check_closed
+
+    return nil if @read >= @header.size
+
+    ret = @io.getc
+    @read += 1 if ret
+
+    ret
+  end
+
+  ##
+  # Is this tar entry a directory?
+
+  def directory?
+    @header.typeflag == "5"
+  end
+
+  ##
+  # Is this tar entry a file?
+
+  def file?
+    @header.typeflag == "0"
+  end
+
+  ##
+  # The position in the tar entry
+
+  def pos
+    check_closed
+
+    bytes_read
+  end
+
+  ##
+  # Reads +len+ bytes from the tar file entry, or the rest of the entry if
+  # nil
+
+  def read(len = nil)
+    check_closed
+
+    return nil if @read >= @header.size
+
+    len ||= @header.size - @read
+    max_read = [len, @header.size - @read].min
+
+    ret = @io.read max_read
+    @read += ret.size
+
+    ret
+  end
+
+  alias readpartial read # :nodoc:
+
+  ##
+  # Rewinds to the beginning of the tar file entry
+
+  def rewind
+    check_closed
+
+    raise Gem::Package::NonSeekableIO unless @io.respond_to? :pos=
+
+    @io.pos = @orig_pos
+    @read = 0
+  end
+
+end
+