Method: GetText::MoFile#hash_string

Defined in:
lib/gettext/runtime/mofile.rb

#hash_string(str) ⇒ Object

From gettext-0.12.1/gettext-runtime/intl/hash-string.h Defines the so called ‘hashpjw’ function by P.J. Weinberger [see Aho/Sethi/Ullman, COMPILERS: Principles, Techniques and Tools, 1986, 1987 Bell Telephone Laboratories, Inc.]



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# File 'lib/gettext/runtime/mofile.rb', line 186

def hash_string(str)
  hval = 0
  i = 0
  str.each_byte do |b|
    break if b == '\0'
    hval <<= 4
    hval += b.to_i
    g = hval & (0xf << (HASHWORDBITS - 4))
    if (g != 0)
      hval ^= g >> (HASHWORDBITS - 8)
      hval ^= g
    end
  end
  hval
end