Class: GdbFlasher::IHex::Segment

Inherits:
Object
  • Object
show all
Defined in:
lib/gdbflasher/ihex.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Segment

Returns a new instance of Segment.



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# File 'lib/gdbflasher/ihex.rb', line 52

def initialize
  @base = 0
  @data = ""
end

Instance Attribute Details

#base ⇒ Object

Returns the value of attribute base.



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# File 'lib/gdbflasher/ihex.rb', line 50

def base
  @base
end

#data ⇒ Object

Returns the value of attribute data.



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# File 'lib/gdbflasher/ihex.rb', line 50

def data
  @data
end

Instance Method Details

#intersect(region_base, region_end) ⇒ Object 



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# File 'lib/gdbflasher/ihex.rb', line 61

def intersect(region_base, region_end)
  if region_base == region_end
    raise ArgumentError, "Region is empty"
  end

  segment_range = @base...@base + size
  region_range  = region_base..region_end

  intersection_base = nil, intersection_end = nil

  if segment_range.cover? region_range.min
    intersection_base = region_range.min
  elsif region_range.cover? segment_range.min
    intersection_base = segment_range.min
  else
    return Segment.new
  end

  if segment_range.cover? region_range.max
    intersection_end = region_range.max
  elsif region_range.cover? segment_range.max
    intersection_end = segment_range.max
  else
    return Segment.new
  end

  segment = Segment.new
  segment.base = intersection_base
  segment.data = @data[intersection_base - @base..intersection_end - @base]

  segment
end

#pad_segment!(psize, fill_byte = 0x00) ⇒ Object 



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# File 'lib/gdbflasher/ihex.rb', line 94

def pad_segment!(psize, fill_byte = 0x00)
  if @base % size != 0
    padding = size - (@base % size)

    @base -= padding
    @data = ([ fill_byte ] * padding).pack("C*") + @data
  end

  if @data.size % size != 0
    padding = size - (@data.size % size)

    @data += ([ fill_byte ] * padding).pack "C*"
  end
end

#size ⇒ Object 



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# File 'lib/gdbflasher/ihex.rb', line 57

def size
  @data.length
end