Class: TermTime::TermInfo

Inherits:
Object
  • Object
show all
Defined in:
lib/termtime/terminfo.rb

Defined Under Namespace

Classes: Number, String

Instance Method Summary collapse

Constructor Details

#initialize(fname = ENV["TERM"]) ⇒ TermInfo

Returns a new instance of TermInfo.



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# File 'lib/termtime/terminfo.rb', line 35

def initialize fname = ENV["TERM"]
  unless File.file? fname
    fname = "/usr/share/terminfo/#{fname.getbyte(0).to_s(16)}/#{fname}"
  end

  File.open fname, "rb" do |f|
    magic,
      names_size,
      booleans_size,
      short_int_count,
      offset_count,
      string_table_size = f.read((2 * 6)).unpack("ssssss")

    raise unless magic == 0432
    @names = f.read(names_size - 1).force_encoding("UTF-8").freeze
    raise unless f.readbyte == 0
    @flags = f.read(booleans_size - 1)

    f.readbyte
    f.readbyte if f.pos % 2 != 0 # alignment

    @numbers = f.read(short_int_count * 2)
    strings = f.read(offset_count * 2)
    string_table = f.read(string_table_size)
    @strings = decode_strings(strings, string_table)
  end
end

Instance Method Details

#flags ⇒ Object 



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# File 'lib/termtime/terminfo.rb', line 63

def flags
  flags = []
  @flags.bytesize.times do |i|
    if @flags.getbyte(i) > 0
      flags << DB::BOOLEAN_LIST.fetch(i)
    end
  end
  flags
end

#getflag(name) ⇒ Object 



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# File 'lib/termtime/terminfo.rb', line 91

def getflag name
  @flags.getbyte(DB::BOOLEANS.fetch(name).i) == 1
end

#getnum(name) ⇒ Object 



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# File 'lib/termtime/terminfo.rb', line 86

def getnum name
  offset = DB::NUMBERS.fetch(name).i * 2
  @numbers.getbyte(offset) | (@numbers.getbyte(offset + 1) << 8)
end

#getstr(name) ⇒ Object 



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# File 'lib/termtime/terminfo.rb', line 95

def getstr name
  str(name).value
end

#names ⇒ Object 



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# File 'lib/termtime/terminfo.rb', line 107

def names
  @names.split("|")
end

#numbers ⇒ Object 



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# File 'lib/termtime/terminfo.rb', line 73

def numbers
  numbers = []
  @numbers.unpack("s*").each_with_index do |v, i|
    next if v == -1
    numbers << Number.new(v, DB::NUMBER_LIST.fetch(i))
  end
  numbers
end

#str(name) ⇒ Object 



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# File 'lib/termtime/terminfo.rb', line 99

def str name
  @strings.fetch(name)
end

#str?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/termtime/terminfo.rb', line 103

def str? name
  @strings.key?(name)
end

#strings ⇒ Object 



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# File 'lib/termtime/terminfo.rb', line 82

def strings
  @strings.values
end