Module: DmmUtil::FormatConvertors

Included in:
Fluke28xDriver
Defined in:
lib/dmm_util/format_convertors.rb

Instance Method Summary collapse

Instance Method Details

#get_double(str, offset) ⇒ Object 



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# File 'lib/dmm_util/format_convertors.rb', line 19

def get_double(str, offset)
  bytestr = str[offset, 8]
  endianstr = bytestr[0,4].reverse + bytestr[4,4].reverse
  endianstr.unpack("G")[0]
end

#get_s16(str, offset) ⇒ Object 



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# File 'lib/dmm_util/format_convertors.rb', line 11

def get_s16(str, offset)
  val = get_u16(str, offset)
  unless (val & 0x8000) == 0
    val = -(0x10000 - val)
  end
  val
end

#get_time(str, offset) ⇒ Object 



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# File 'lib/dmm_util/format_convertors.rb', line 25

def get_time(str, offset)
  parse_time(get_double(str, offset))
end

#get_u16(str, offset) ⇒ Object 



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# File 'lib/dmm_util/format_convertors.rb', line 5

def get_u16(str, offset)
  lo_byte = str[offset]
  hi_byte = str[offset + 1]
  hi_byte * 0x100 + lo_byte
end

#parse_time(t) ⇒ Object 



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# File 'lib/dmm_util/format_convertors.rb', line 29

def parse_time(t)
  tz_offset = Time.now.utc_offset
  Time.at(t - tz_offset)
end

#quote_str(str) ⇒ Object 



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# File 'lib/dmm_util/format_convertors.rb', line 34

def quote_str(str)
  has_single = str.include?("'")
  has_double = str.include?('"')
  
  if has_single && !has_double
    "\"#{str}\""
  else
    "'#{str.gsub(/'/, "''")}'"
  end
end