Sha256: a1eeeb940b9342f0704cee717fbd58cdfd50c33997c2230b327f539d8cc0e361
Contents?: true
Size: 1.66 KB
Versions: 9
Compression:
Stored size: 1.66 KB
Contents
require 'protobuf/field/base_field'
module Protobuf
module Field
class VarintField < BaseField
##
# Constants
#
CACHE_LIMIT = 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
##
# Class Methods
#
def self.default
0
end
# 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
def self.cached_varint(value)
@_varint_cache ||= {}
(@_varint_cache[value] ||= encode(value, false)).dup
end
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
# Load the cache of VarInts on load of file
(0..CACHE_LIMIT).each do |cached_value|
cached_varint(cached_value)
end
##
# Public Instance Methods
#
def acceptable?(val)
int_val = coerce!(val)
int_val >= self.class.min && int_val <= self.class.max
rescue
false
end
def coerce!(val)
return val.to_i if val.is_a?(Numeric)
Integer(val, 10)
end
def decode(value)
value
end
def encode(value)
::Protobuf::Field::VarintField.encode(value)
end
def wire_type
::Protobuf::WireType::VARINT
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems