Class: Protobuf::Field::VarintField

Inherits:
BaseField
  • Object
show all
Defined in:
lib/protobuf/field/varint_field.rb

Constant Summary collapse

CACHE_LIMIT =

Constants

2048
INT32_MAX = 
2**31 - 1
INT32_MIN = 
-2**31
INT64_MAX = 
2**63 - 1
INT64_MIN = 
-2**63
UINT32_MAX = 
2**32 - 1
UINT64_MAX = 
2**64 - 1

Constants inherited from BaseField

BaseField::PACKED_TYPES

Instance Attribute Summary

Attributes inherited from BaseField

#fully_qualified_name, #message_class, #name, #options, #rule, #tag, #type_class

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from BaseField

#default, #default_value, #deprecated?, #enum?, #extension?, #fully_qualified_name_only!, #initialize, #message?, #optional?, #packed?, #repeated?, #repeated_message?, #required?, #set, #tag_encoded, #to_s

Methods included from Logging

initialize_logger, #log_exception, #log_signature, #logger, #sign_message

Constructor Details

This class inherits a constructor from Protobuf::Field::BaseField

Class Method Details

.cached_varint(value) ⇒ Object

Because all tags and enums are calculated as VarInt it is "most common" to have values < CACHE_LIMIT (low numbers) which is defaulting to 1024



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# File 'lib/protobuf/field/varint_field.rb', line 29

def self.cached_varint(value)
  @_varint_cache ||= {}
  (@_varint_cache[value] ||= encode(value, false)).dup
end

.default ⇒ Object

Class Methods



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# File 'lib/protobuf/field/varint_field.rb', line 23

def self.default
  0
end

.encode(value, use_cache = true) ⇒ Object 



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# File 'lib/protobuf/field/varint_field.rb', line 34

def self.encode(value, use_cache = true)
  return cached_varint(value) if use_cache && value >= 0 && value <= CACHE_LIMIT

  bytes = []
  until value < 128
    bytes << (0x80 | (value & 0x7f))
    value >>= 7
  end
  (bytes << value).pack('C*')
end

Instance Method Details

#acceptable?(val) ⇒ Boolean

Public Instance Methods

Returns:

  • (Boolean) 


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# File 'lib/protobuf/field/varint_field.rb', line 53

def acceptable?(val)
  int_val = if val.is_a?(Integer)
              return true if val >= 0 && val < INT32_MAX # return quickly for smallest integer size, hot code path
              val
            else
              coerce!(val)
            end

  int_val >= self.class.min && int_val <= self.class.max
rescue
  false
end

#coerce!(val) ⇒ Object 



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# File 'lib/protobuf/field/varint_field.rb', line 66

def coerce!(val)
  return val.to_i if val.is_a?(Numeric)
  Integer(val, 10)
end

#decode(value) ⇒ Object 



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# File 'lib/protobuf/field/varint_field.rb', line 71

def decode(value)
  value
end

#encode(value) ⇒ Object 



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# File 'lib/protobuf/field/varint_field.rb', line 75

def encode(value)
  ::Protobuf::Field::VarintField.encode(value)
end

#wire_type ⇒ Object 



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# File 'lib/protobuf/field/varint_field.rb', line 79

def wire_type
  ::Protobuf::WireType::VARINT
end