Class: String

Inherits:
Object show all
Defined in:
lib/ragweed/utils.rb

Instance Method Summary collapse

Instance Method Details

#asciiz ⇒ Object

Sometimes string buffers passed through Win32 interfaces come with garbage after the trailing NUL; this method gets rid of that, like String#trim



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# File 'lib/ragweed/utils.rb', line 109

def asciiz
  begin
    return self if self.index("\x00") == nil
    self[0..self.index("\x00")-1]
  rescue
    self
  end
end

#asciiz! ⇒ Object 



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# File 'lib/ragweed/utils.rb', line 118

def asciiz!; replace asciiz; end

#dehexify ⇒ Object

Convert a string of raw hex characters (no %‘s or anything) into binary



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# File 'lib/ragweed/utils.rb', line 126

def dehexify
  [self].pack("H*")
end

#from_utf16 ⇒ Object Also known as: to_utf8, to_ascii 



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# File 'lib/ragweed/utils.rb', line 89

def from_utf16
    ret = Iconv.iconv("utf-8", "utf-16le", self).first
    if ret[-1] == 0
        ret = ret[0..-2]
    end
end

#from_utf16_buffer ⇒ Object 



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# File 'lib/ragweed/utils.rb', line 97

def from_utf16_buffer
    self[0..index("\0\0\0")+2].from_utf16
end

#hexify ⇒ Object

Convert a string into hex characters



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# File 'lib/ragweed/utils.rb', line 121

def hexify
  self.unpack("H*").first
end

#shift(count = 1) ⇒ Object 



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# File 'lib/ragweed/utils.rb', line 101

def shift(count=1)
  return self if count == 0
  slice! 0..(count-1)
end

#shift_b16 ⇒ Object 



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# File 'lib/ragweed/utils.rb', line 84

def shift_b16; shift(2).to_b16; end

#shift_b32 ⇒ Object 



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# File 'lib/ragweed/utils.rb', line 82

def shift_b32; shift(4).to_b32; end

#shift_l16 ⇒ Object 



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# File 'lib/ragweed/utils.rb', line 83

def shift_l16; shift(2).to_l16; end

#shift_l32 ⇒ Object 



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# File 'lib/ragweed/utils.rb', line 81

def shift_l32; shift(4).to_l32; end

#shift_u8 ⇒ Object 



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# File 'lib/ragweed/utils.rb', line 85

def shift_u8; shift(1).to_u8; end

#to_b16 ⇒ Object

to big endian 16bit short



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# File 'lib/ragweed/utils.rb', line 79

def to_b16; unpack("n").first; end

#to_b32 ⇒ Object

to big endian 32bit integer



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# File 'lib/ragweed/utils.rb', line 75

def to_b32; unpack("N").first; end

#to_l16 ⇒ Object

to little endian 16bit short



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# File 'lib/ragweed/utils.rb', line 77

def to_l16; unpack("v").first; end

#to_l32 ⇒ Object

to little endian 32bit integer



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# File 'lib/ragweed/utils.rb', line 73

def to_l32; unpack("L").first; end

#to_u8 ⇒ Object 



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# File 'lib/ragweed/utils.rb', line 80

def to_u8; self[0]; end

#to_utf16 ⇒ Object 



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# File 'lib/ragweed/utils.rb', line 86

def to_utf16
    Iconv.iconv("utf-16LE", "utf-8", self).first + "\x00\x00"
end