Class: Depix::CharField

Inherits:
Field
  • Object
show all
Defined in:
lib/depix/dict.rb

Constant Summary collapse

BLANK = 
"\0"
BLANKING_VALUES = 
[0x00.chr, 0xFF.chr]
BLANKING_PATTERNS = 
BLANKING_VALUES.inject([]) do | p, char |
  p << /^([#{char}]+)/ << /([#{char}]+)$/mu
end

Instance Attribute Summary

Attributes inherited from Field

#desc, #length, #name, #req

Instance Method Summary collapse

Methods inherited from Field

#consume!, emit_char, emit_r32, emit_u16, emit_u32, emit_u8, #explain, #initialize

Constructor Details

This class inherits a constructor from Depix::Field

Instance Method Details

#clean(v) ⇒ Object 



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# File 'lib/depix/dict.rb', line 231

def clean(v)
  if v == BLANK
    nil
  else
    # Truncate everything from the null byte up
    upto_nulb = v.split(0x00.chr).shift
    (upto_nulb.nil? || upto_nulb.empty?) ? nil : upto_nulb
  end
end

#pack(value) ⇒ Object 



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# File 'lib/depix/dict.rb', line 250

def pack(value)
  value.ljust(length, "\000") rescue ("\000" * length)
end

#pattern ⇒ Object 



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# File 'lib/depix/dict.rb', line 227

def pattern
  "A#{(length || 1).to_i}"
end

#rtype ⇒ Object 



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# File 'lib/depix/dict.rb', line 241

def rtype
  String
end

#validate!(value) ⇒ Object 



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# File 'lib/depix/dict.rb', line 245

def validate!(value)
  super(value)
  raise "#{value} overflows the #{length} bytes allocated" if !value.nil? && value.length > length
end