Method: TCellAgent::Utils::Strings.java_hashcode

Defined in:
lib/tcell_agent/utils/strings.rb

.java_hashcode(str) ⇒ Object

emulate the java String.hashcode() without upcasting to BigInt



21
22
23
24
25
26
27
28
 
# File 'lib/tcell_agent/utils/strings.rb', line 21

def self.java_hashcode(str)
  result = 0
  str.each_codepoint do |cp|
    # prevent overflow into BigInt which would cause heap allocs + emulate c-style int32 signed add overflow
    result = ((((((result & 0x07FFFFFF) << 5) - result) + cp) + 0x80000000) & 0xFFFFFFFF) - 0x80000000
  end
  result
end