Class: Oinky::Internal::DB_string

Inherits:
FFI::Struct
  • Object
show all
Includes:
NativeBuffer
Defined in:
lib/oinky.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from NativeBuffer

#<=>, #clone, #each_byte, #each_char, #inspect, #rb_str

Instance Attribute Details

#refs ⇒ Object

Returns the value of attribute refs.



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# File 'lib/oinky.rb', line 71

def refs
  @refs
end

Class Method Details

.make(val) ⇒ Object 



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# File 'lib/oinky.rb', line 73

def self.make(val)
  nv = DB_string.new
  nv.refs = make_in_place(nv, val)
  nv
end

.make_in_place(nv, val) ⇒ Object

Have to separate like this because FFI Doesn’t allow assigning to structs by value.



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# File 'lib/oinky.rb', line 81

def self.make_in_place(nv, val)
  if val.is_a? String
    val = NativeMallocBuffer.new(val)
    nv[:bytes] = val.ptr
    nv[:length] = val.length
  elsif val.is_a? NativeBuffer
    nv[:bytes] = val.ptr
    nv[:length] = val.length
  else
    raise OinkyException.new("Argument is not a recognized string")
  end

  # Caller keeps the source object in memory as long as the variant.
  # This is important whatever the source, ruby strings and 
  # NativeBuffers equally.
  return val
end

Instance Method Details

#length ⇒ Object 



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# File 'lib/oinky.rb', line 103

def length
  self[:length]
end

#ptr ⇒ Object

These are required by NativeBuffer



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# File 'lib/oinky.rb', line 100

def ptr
  self[:bytes]
end