Class: UUIDTools::UUID
Overview
UUIDTools was designed to be a simple library for generating any of the various types of UUIDs. It conforms to RFC 4122 whenever possible.
Constant Summary collapse
- @@last_timestamp =
This classvariable is part of a private API. You should avoid using this classvariable if possible, as it may be removed or be changed in the future.
nil
- @@last_node_id =
This classvariable is part of a private API. You should avoid using this classvariable if possible, as it may be removed or be changed in the future.
nil
- @@last_clock_sequence =
This classvariable is part of a private API. You should avoid using this classvariable if possible, as it may be removed or be changed in the future.
nil
- @@state_file =
This classvariable is part of a private API. You should avoid using this classvariable if possible, as it may be removed or be changed in the future.
nil
- @@mutex =
This classvariable is part of a private API. You should avoid using this classvariable if possible, as it may be removed or be changed in the future.
Mutex.new
Class Attribute Summary collapse
-
.ifconfig_command ⇒ Object
Returns the value of attribute ifconfig_command.
-
.ifconfig_path_default ⇒ Object
Returns the value of attribute ifconfig_path_default.
-
.ip_command ⇒ Object
Returns the value of attribute ip_command.
-
.ip_path_default ⇒ Object
Returns the value of attribute ip_path_default.
Instance Attribute Summary collapse
-
#clock_seq_hi_and_reserved ⇒ Object
Returns the value of attribute ‘clock_seq_hi_and_reserved`.
-
#clock_seq_low ⇒ Object
Returns the value of attribute ‘clock_seq_low`.
-
#nodes ⇒ Object
Returns the value of attribute ‘nodes`.
-
#time_hi_and_version ⇒ Object
Returns the value of attribute ‘time_hi_and_version`.
-
#time_low ⇒ Object
Returns the value of attribute ‘time_low`.
-
#time_mid ⇒ Object
Returns the value of attribute ‘time_mid`.
Class Method Summary collapse
- .convert_byte_string_to_int(byte_string) ⇒ Object private
- .convert_int_to_byte_string(integer, size) ⇒ Object private
-
.create_from_hash(hash_class, namespace, name) ⇒ Object
private
Creates a new UUID from a SHA1 or MD5 hash.
-
.first_mac(instring) ⇒ Object
Match and return the first Mac address found.
-
.ifconfig(all = nil) ⇒ Object
Call the ifconfig or ip command that is found.
-
.ifconfig_path ⇒ Object
Find the path of the ifconfig(8) command if it is present.
-
.ip_path ⇒ Object
Find the path of the ip(8) command if it is present.
-
.mac_address ⇒ Object
Returns the MAC address of the current computer’s network card.
-
.mac_address=(new_mac_address) ⇒ Object
Allows users to set the MAC address manually in cases where the MAC address cannot be obtained programatically.
-
.md5_create(namespace, name) ⇒ Object
Creates a UUID using the MD5 hash.
-
.os_class ⇒ Object
Determine what OS we’re running on.
-
.parse(uuid_string) ⇒ Object
Parses a UUID from a string.
-
.parse_hexdigest(uuid_hexdigest) ⇒ Object
Parse a UUID from a hexdigest String.
-
.parse_int(uuid_int) ⇒ Object
Parses a UUID from an Integer.
-
.parse_raw(raw_string) ⇒ Object
Parses a UUID from a raw byte string.
-
.random_create ⇒ Object
Creates a UUID from a random value.
-
.sha1_create(namespace, name) ⇒ Object
Creates a UUID using the SHA1 hash.
-
.timestamp_create(timestamp = nil) ⇒ Object
Creates a UUID from a timestamp.
Instance Method Summary collapse
-
#<=>(other_uuid) ⇒ Object
Compares two UUIDs lexically.
-
#eql?(other) ⇒ Boolean
Returns true if this UUID is exactly equal to the other UUID.
-
#hash ⇒ Object
Returns an integer hash value.
-
#hexdigest ⇒ Object
Returns the hex digest of the UUID object.
-
#initialize(time_low, time_mid, time_hi_and_version, clock_seq_hi_and_reserved, clock_seq_low, nodes) ⇒ UUID
constructor
private
Creates a new UUID structure from its component values.
-
#inspect ⇒ Object
Returns a representation of the object’s state.
-
#mac_address ⇒ Object
Returns the IEEE 802 address used to generate this UUID or nil if a MAC address was not used.
-
#nil_uuid? ⇒ Boolean
Returns true if this UUID is the nil UUID (00000000-0000-0000-0000-000000000000).
-
#random_node_id? ⇒ Boolean
This method applies only to version 1 UUIDs.
-
#raw ⇒ Object
Returns the raw bytes that represent this UUID.
-
#timestamp ⇒ Object
Returns the timestamp used to generate this UUID.
-
#to_i ⇒ Object
Returns an integer representation for this UUID.
-
#to_s ⇒ Object
(also: #to_str)
Returns a string representation for this UUID.
-
#to_uri ⇒ Object
Returns a URI string for this UUID.
-
#valid? ⇒ Boolean
Returns true if this UUID is valid.
-
#variant ⇒ Object
Returns the UUID variant.
-
#version ⇒ Object
Returns the UUID version type.
Constructor Details
#initialize(time_low, time_mid, time_hi_and_version, clock_seq_hi_and_reserved, clock_seq_low, nodes) ⇒ UUID
This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.
Creates a new UUID structure from its component values.
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 |
# File 'lib/uuidtools.rb', line 80 def initialize(time_low, time_mid, time_hi_and_version, clock_seq_hi_and_reserved, clock_seq_low, nodes) unless time_low >= 0 && time_low < 4294967296 raise ArgumentError, "Expected unsigned 32-bit number for time_low, got #{time_low}." end unless time_mid >= 0 && time_mid < 65536 raise ArgumentError, "Expected unsigned 16-bit number for time_mid, got #{time_mid}." end unless time_hi_and_version >= 0 && time_hi_and_version < 65536 raise ArgumentError, "Expected unsigned 16-bit number for time_hi_and_version, " + "got #{time_hi_and_version}." end unless clock_seq_hi_and_reserved >= 0 && clock_seq_hi_and_reserved < 256 raise ArgumentError, "Expected unsigned 8-bit number for clock_seq_hi_and_reserved, " + "got #{clock_seq_hi_and_reserved}." end unless clock_seq_low >= 0 && clock_seq_low < 256 raise ArgumentError, "Expected unsigned 8-bit number for clock_seq_low, " + "got #{clock_seq_low}." end unless nodes.kind_of?(Enumerable) raise TypeError, "Expected Enumerable, got #{nodes.class.name}." end unless nodes.size == 6 raise ArgumentError, "Expected nodes to have size of 6." end for node in nodes unless node >= 0 && node < 256 raise ArgumentError, "Expected unsigned 8-bit number for each node, " + "got #{node}." end end @time_low = time_low @time_mid = time_mid @time_hi_and_version = time_hi_and_version @clock_seq_hi_and_reserved = clock_seq_hi_and_reserved @clock_seq_low = clock_seq_low @nodes = nodes end |
Class Attribute Details
.ifconfig_command ⇒ Object
Returns the value of attribute ifconfig_command.
550 551 552 |
# File 'lib/uuidtools.rb', line 550 def ifconfig_command @ifconfig_command end |
.ifconfig_path_default ⇒ Object
Returns the value of attribute ifconfig_path_default.
550 551 552 |
# File 'lib/uuidtools.rb', line 550 def ifconfig_path_default @ifconfig_path_default end |
.ip_command ⇒ Object
Returns the value of attribute ip_command.
551 552 553 |
# File 'lib/uuidtools.rb', line 551 def ip_command @ip_command end |
.ip_path_default ⇒ Object
Returns the value of attribute ip_path_default.
551 552 553 |
# File 'lib/uuidtools.rb', line 551 def ip_path_default @ip_path_default end |
Instance Attribute Details
#clock_seq_hi_and_reserved ⇒ Object
Returns the value of attribute ‘clock_seq_hi_and_reserved`
142 143 144 |
# File 'lib/uuidtools.rb', line 142 def clock_seq_hi_and_reserved @clock_seq_hi_and_reserved end |
#clock_seq_low ⇒ Object
Returns the value of attribute ‘clock_seq_low`
146 147 148 |
# File 'lib/uuidtools.rb', line 146 def clock_seq_low @clock_seq_low end |
#nodes ⇒ Object
Returns the value of attribute ‘nodes`
150 151 152 |
# File 'lib/uuidtools.rb', line 150 def nodes @nodes end |
#time_hi_and_version ⇒ Object
Returns the value of attribute ‘time_hi_and_version`
138 139 140 |
# File 'lib/uuidtools.rb', line 138 def time_hi_and_version @time_hi_and_version end |
#time_low ⇒ Object
Returns the value of attribute ‘time_low`
130 131 132 |
# File 'lib/uuidtools.rb', line 130 def time_low @time_low end |
#time_mid ⇒ Object
Returns the value of attribute ‘time_mid`
134 135 136 |
# File 'lib/uuidtools.rb', line 134 def time_mid @time_mid end |
Class Method Details
.convert_byte_string_to_int(byte_string) ⇒ Object
This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.
710 711 712 713 714 715 716 717 718 719 720 721 722 |
# File 'lib/uuidtools.rb', line 710 def self.convert_byte_string_to_int(byte_string) if byte_string.respond_to?(:force_encoding) byte_string.force_encoding(Encoding::ASCII_8BIT) end integer = 0 size = byte_string.size for i in 0..(size - 1) ordinal = (byte_string[i].respond_to?(:ord) ? byte_string[i].ord : byte_string[i]) integer += (ordinal << (((size - 1) - i) * 8)) end return integer end |
.convert_int_to_byte_string(integer, size) ⇒ Object
This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.
697 698 699 700 701 702 703 704 705 706 |
# File 'lib/uuidtools.rb', line 697 def self.convert_int_to_byte_string(integer, size) byte_string = "" if byte_string.respond_to?(:force_encoding) byte_string.force_encoding(Encoding::ASCII_8BIT) end for i in 0..(size - 1) byte_string << ((integer >> (((size - 1) - i) * 8)) & 0xFF) end return byte_string end |
.create_from_hash(hash_class, namespace, name) ⇒ Object
This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.
Creates a new UUID from a SHA1 or MD5 hash
672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 |
# File 'lib/uuidtools.rb', line 672 def self.create_from_hash(hash_class, namespace, name) if hash_class == Digest::MD5 version = 3 elsif hash_class == Digest::SHA1 version = 5 else raise ArgumentError, "Expected Digest::SHA1 or Digest::MD5, got #{hash_class.name}." end hash = hash_class.new hash.update(namespace.raw) hash.update(name) hash_string = hash.to_s[0..31] new_uuid = self.parse("#{hash_string[0..7]}-#{hash_string[8..11]}-" + "#{hash_string[12..15]}-#{hash_string[16..19]}-#{hash_string[20..31]}") new_uuid.time_hi_and_version &= 0x0FFF new_uuid.time_hi_and_version |= (version << 12) new_uuid.clock_seq_hi_and_reserved &= 0x3F new_uuid.clock_seq_hi_and_reserved |= 0x80 return new_uuid end |
.first_mac(instring) ⇒ Object
Match and return the first Mac address found
591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 |
# File 'lib/uuidtools.rb', line 591 def self.first_mac(instring) mac_regexps = [ Regexp.new("address:? (#{(["[0-9a-fA-F]{2}"] * 6).join(":")})"), Regexp.new("addr:? (#{(["[0-9a-fA-F]{2}"] * 6).join(":")})"), Regexp.new("ether:? (#{(["[0-9a-fA-F]{1,2}"] * 6).join(":")})"), Regexp.new("HWaddr:? (#{(["[0-9a-fA-F]{2}"] * 6).join(":")})"), Regexp.new("link/ether? (#{(["[0-9a-fA-F]{2}"] * 6).join(":")})"), Regexp.new("(#{(["[0-9a-fA-F]{2}"] * 6).join(":")})"), Regexp.new("(#{(["[0-9a-fA-F]{2}"] * 6).join("-")})") ] parse_mac = lambda do |output| (mac_regexps.map do |regexp| result = output[regexp, 1] result.downcase.gsub(/-/, ":") if result != nil end).compact.first end mac = parse_mac.call(instring) if mac # expand octets that were compressed (solaris) return (mac.split(':').map do |octet| (octet.length == 1 ? "0#{octet}" : octet) end).join(':') else return nil end end |
.ifconfig(all = nil) ⇒ Object
Call the ifconfig or ip command that is found
575 576 577 578 579 580 581 582 583 584 585 586 587 588 |
# File 'lib/uuidtools.rb', line 575 def self.ifconfig(all=nil) # find the path of the ifconfig command ifconfig_path = UUID.ifconfig_path # if it does not exist, try the ip command if ifconfig_path == nil ifconfig_path = "#{UUID.ip_path} addr list" # all makes no sense when using ip(1) all = nil end all_switch = all == nil ? "" : "-a" return `#{ifconfig_path} #{all_switch}` if not ifconfig_path == nil end |
.ifconfig_path ⇒ Object
Find the path of the ifconfig(8) command if it is present
557 558 559 560 561 |
# File 'lib/uuidtools.rb', line 557 def self.ifconfig_path path = `which #{UUID.ifconfig_command} 2>/dev/null`.strip path = UUID.ifconfig_path_default if (path == "" && File.exist?(UUID.ifconfig_path_default)) return (path === "" ? nil : path) end |
.ip_path ⇒ Object
Find the path of the ip(8) command if it is present
566 567 568 569 570 |
# File 'lib/uuidtools.rb', line 566 def self.ip_path path = `which #{UUID.ip_command} 2>/dev/null`.strip path = UUID.ip_path_default if (path == "" && File.exist?(UUID.ip_path_default)) return (path === "" ? nil : path) end |
.mac_address ⇒ Object
Returns the MAC address of the current computer’s network card. Returns nil if a MAC address could not be found.
622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 |
# File 'lib/uuidtools.rb', line 622 def self.mac_address if !defined?(@@mac_address) require 'rbconfig' os_class = UUID.os_class if os_class == :windows begin @@mac_address = UUID.first_mac `ipconfig /all` rescue end else # linux, bsd, macos, solaris @@mac_address = UUID.first_mac(UUID.ifconfig(:all)) end if @@mac_address != nil if @@mac_address.respond_to?(:to_str) @@mac_address = @@mac_address.to_str else @@mac_address = @@mac_address.to_s end @@mac_address.downcase! @@mac_address.strip! end # Verify that the MAC address is in the right format. # Nil it out if it isn't. unless @@mac_address.respond_to?(:scan) && @@mac_address.scan(/#{(["[0-9a-f]{2}"] * 6).join(":")}/) @@mac_address = nil end end return @@mac_address end |
.mac_address=(new_mac_address) ⇒ Object
Allows users to set the MAC address manually in cases where the MAC address cannot be obtained programatically.
660 661 662 |
# File 'lib/uuidtools.rb', line 660 def self.mac_address=(new_mac_address) @@mac_address = new_mac_address end |
.md5_create(namespace, name) ⇒ Object
Creates a UUID using the MD5 hash. (Version 3)
289 290 291 |
# File 'lib/uuidtools.rb', line 289 def self.md5_create(namespace, name) return self.create_from_hash(Digest::MD5, namespace, name) end |
.os_class ⇒ Object
Determine what OS we’re running on. Helps decide how to find the MAC
527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 |
# File 'lib/uuidtools.rb', line 527 def self.os_class require 'rbconfig' os_platform = RbConfig::CONFIG['target_os'] os_class = nil if (os_platform =~ /win/i && !(os_platform =~ /darwin/i)) || os_platform =~ /w32/i os_class = :windows elsif os_platform =~ /solaris/i os_class = :solaris elsif os_platform =~ /netbsd/i os_class = :netbsd elsif os_platform =~ /openbsd/i os_class = :openbsd end end |
.parse(uuid_string) ⇒ Object
Parses a UUID from a string.
154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 |
# File 'lib/uuidtools.rb', line 154 def self.parse(uuid_string) unless uuid_string.kind_of? String raise TypeError, "Expected String, got #{uuid_string.class.name} instead." end uuid_components = uuid_string.downcase.scan(UUIDTools::UUID_REGEXP).first raise ArgumentError, "Invalid UUID format." if uuid_components.nil? time_low = uuid_components[0].to_i(16) time_mid = uuid_components[1].to_i(16) time_hi_and_version = uuid_components[2].to_i(16) clock_seq_hi_and_reserved = uuid_components[3].to_i(16) clock_seq_low = uuid_components[4].to_i(16) nodes = [] for i in 0..5 nodes << uuid_components[5][(i * 2)..(i * 2) + 1].to_i(16) end return self.new(time_low, time_mid, time_hi_and_version, clock_seq_hi_and_reserved, clock_seq_low, nodes) end |
.parse_hexdigest(uuid_hexdigest) ⇒ Object
Parse a UUID from a hexdigest String.
208 209 210 211 212 213 214 |
# File 'lib/uuidtools.rb', line 208 def self.parse_hexdigest(uuid_hexdigest) unless uuid_hexdigest.kind_of?(String) raise ArgumentError, "Expected String, got #{uuid_hexdigest.class.name} instead." end return self.parse_int(uuid_hexdigest.to_i(16)) end |
.parse_int(uuid_int) ⇒ Object
Parses a UUID from an Integer.
198 199 200 201 202 203 204 |
# File 'lib/uuidtools.rb', line 198 def self.parse_int(uuid_int) unless uuid_int.kind_of?(Integer) raise ArgumentError, "Expected Integer, got #{uuid_int.class.name} instead." end return self.parse_raw(self.convert_int_to_byte_string(uuid_int, 16)) end |
.parse_raw(raw_string) ⇒ Object
Parses a UUID from a raw byte string.
176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 |
# File 'lib/uuidtools.rb', line 176 def self.parse_raw(raw_string) unless raw_string.kind_of? String raise TypeError, "Expected String, got #{raw_string.class.name} instead." end integer = self.convert_byte_string_to_int(raw_string) time_low = (integer >> 96) & 0xFFFFFFFF time_mid = (integer >> 80) & 0xFFFF time_hi_and_version = (integer >> 64) & 0xFFFF clock_seq_hi_and_reserved = (integer >> 56) & 0xFF clock_seq_low = (integer >> 48) & 0xFF nodes = [] for i in 0..5 nodes << ((integer >> (40 - (i * 8))) & 0xFF) end return self.new(time_low, time_mid, time_hi_and_version, clock_seq_hi_and_reserved, clock_seq_low, nodes) end |
.random_create ⇒ Object
Creates a UUID from a random value.
218 219 220 221 222 223 224 225 |
# File 'lib/uuidtools.rb', line 218 def self.random_create() new_uuid = self.parse_raw(SecureRandom.random_bytes(16)) new_uuid.time_hi_and_version &= 0x0FFF new_uuid.time_hi_and_version |= (4 << 12) new_uuid.clock_seq_hi_and_reserved &= 0x3F new_uuid.clock_seq_hi_and_reserved |= 0x80 return new_uuid end |
.sha1_create(namespace, name) ⇒ Object
Creates a UUID using the SHA1 hash. (Version 5)
295 296 297 |
# File 'lib/uuidtools.rb', line 295 def self.sha1_create(namespace, name) return self.create_from_hash(Digest::SHA1, namespace, name) end |
.timestamp_create(timestamp = nil) ⇒ Object
Creates a UUID from a timestamp.
229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 |
# File 'lib/uuidtools.rb', line 229 def self.(=nil) # We need a lock here to prevent two threads from ever # getting the same timestamp. @@mutex.synchronize do # Always use GMT to generate UUIDs. if .nil? = Time.now.gmtime else = .gmtime end # Convert to 100 nanosecond blocks = (.tv_sec * 10000000) + (.tv_usec * 10) + 0x01B21DD213814000 mac_address = self.mac_address node_id = 0 if mac_address != nil nodes = mac_address.split(":").collect do |octet| octet.to_i(16) end else nodes = SecureRandom.random_bytes(6).unpack("C*") nodes[0] |= 0b00000001 end for i in 0..5 node_id += (nodes[i] << (40 - (i * 8))) end clock_sequence = @@last_clock_sequence if clock_sequence.nil? clock_sequence = self.convert_byte_string_to_int( SecureRandom.random_bytes(16) ) end if @@last_node_id != nil && @@last_node_id != node_id # The node id has changed. Change the clock id. clock_sequence = self.convert_byte_string_to_int( SecureRandom.random_bytes(16) ) elsif @@last_timestamp != nil && <= @@last_timestamp clock_sequence = clock_sequence + 1 end @@last_timestamp = @@last_node_id = node_id @@last_clock_sequence = clock_sequence time_low = & 0xFFFFFFFF time_mid = (( >> 32) & 0xFFFF) time_hi_and_version = (( >> 48) & 0x0FFF) time_hi_and_version |= (1 << 12) clock_seq_low = clock_sequence & 0xFF; clock_seq_hi_and_reserved = (clock_sequence & 0x3F00) >> 8 clock_seq_hi_and_reserved |= 0x80 return self.new(time_low, time_mid, time_hi_and_version, clock_seq_hi_and_reserved, clock_seq_low, nodes) end end |
Instance Method Details
#<=>(other_uuid) ⇒ Object
Compares two UUIDs lexically
395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 |
# File 'lib/uuidtools.rb', line 395 def <=>(other_uuid) return nil unless other_uuid.is_a?(UUIDTools::UUID) check = self.time_low <=> other_uuid.time_low return check if check != 0 check = self.time_mid <=> other_uuid.time_mid return check if check != 0 check = self.time_hi_and_version <=> other_uuid.time_hi_and_version return check if check != 0 check = self.clock_seq_hi_and_reserved <=> other_uuid.clock_seq_hi_and_reserved return check if check != 0 check = self.clock_seq_low <=> other_uuid.clock_seq_low return check if check != 0 for i in 0..5 if (self.nodes[i] < other_uuid.nodes[i]) return -1 end if (self.nodes[i] > other_uuid.nodes[i]) return 1 end end return 0 end |
#eql?(other) ⇒ Boolean
Returns true if this UUID is exactly equal to the other UUID.
520 521 522 |
# File 'lib/uuidtools.rb', line 520 def eql?(other) return self == other end |
#hash ⇒ Object
Returns an integer hash value.
460 461 462 |
# File 'lib/uuidtools.rb', line 460 def hash self.frozen? ? generate_hash : (@hash ||= generate_hash) end |
#hexdigest ⇒ Object
Returns the hex digest of the UUID object.
427 428 429 430 431 |
# File 'lib/uuidtools.rb', line 427 def hexdigest (self.frozen? ? generate_hexdigest : (@hexdigest ||= generate_hexdigest) ).dup end |
#inspect ⇒ Object
Returns a representation of the object’s state
421 422 423 |
# File 'lib/uuidtools.rb', line 421 def inspect return "#<UUID:0x#{self.object_id.to_s(16)} UUID:#{self.to_s}>" end |
#mac_address ⇒ Object
Returns the IEEE 802 address used to generate this UUID or nil if a MAC address was not used.
372 373 374 375 376 377 378 |
# File 'lib/uuidtools.rb', line 372 def mac_address return nil if self.version != 1 return nil if self.random_node_id? return (self.nodes.collect do |node| sprintf("%2.2x", node) end).join(":") end |
#nil_uuid? ⇒ Boolean
Returns true if this UUID is the nil UUID (00000000-0000-0000-0000-000000000000).
314 315 316 317 318 319 320 321 322 323 324 |
# File 'lib/uuidtools.rb', line 314 def nil_uuid? return false if self.time_low != 0 return false if self.time_mid != 0 return false if self.time_hi_and_version != 0 return false if self.clock_seq_hi_and_reserved != 0 return false if self.clock_seq_low != 0 self.nodes.each do |node| return false if node != 0 end return true end |
#random_node_id? ⇒ Boolean
This method applies only to version 1 UUIDs. Checks if the node ID was generated from a random number or from an IEEE 802 address (MAC address). Always returns false for UUIDs that aren’t version 1. This should not be confused with version 4 UUIDs where more than just the node id is random.
306 307 308 309 |
# File 'lib/uuidtools.rb', line 306 def random_node_id? return false if self.version != 1 return ((self.nodes.first & 0x01) == 1) end |
#raw ⇒ Object
Returns the raw bytes that represent this UUID.
435 436 437 |
# File 'lib/uuidtools.rb', line 435 def raw (self.frozen? ? generate_raw : (@raw ||= generate_raw)).dup end |
#timestamp ⇒ Object
Returns the timestamp used to generate this UUID
382 383 384 385 386 387 388 389 390 391 |
# File 'lib/uuidtools.rb', line 382 def return nil if self.version != 1 = 0 += ((self.time_hi_and_version & 0x0FFF) << 48) += (self.time_mid << 32) += self.time_low return Time.at( ( - 0x01B21DD213814000) / 10000000.0) end |
#to_i ⇒ Object
Returns an integer representation for this UUID.
448 449 450 |
# File 'lib/uuidtools.rb', line 448 def to_i self.frozen? ? generate_i : (@integer ||= generate_i) end |
#to_s ⇒ Object Also known as: to_str
Returns a string representation for this UUID.
441 442 443 |
# File 'lib/uuidtools.rb', line 441 def to_s (self.frozen? ? generate_s : (@string ||= generate_s)).dup end |
#to_uri ⇒ Object
Returns a URI string for this UUID.
454 455 456 |
# File 'lib/uuidtools.rb', line 454 def to_uri return "urn:uuid:#{self.to_s}" end |
#valid? ⇒ Boolean
Returns true if this UUID is valid.
360 361 362 363 364 365 366 367 |
# File 'lib/uuidtools.rb', line 360 def valid? if [0b000, 0b100, 0b110, 0b111].include?(self.variant) && (1..5).include?(self.version) return true else return false end end |
#variant ⇒ Object
Returns the UUID variant. Possible values: 0b000 - Reserved, NCS backward compatibility. 0b100 - The variant specified in this document. 0b110 - Reserved, Microsoft Corporation backward compatibility. 0b111 - Reserved for future definition.
345 346 347 348 349 350 351 352 353 354 355 356 |
# File 'lib/uuidtools.rb', line 345 def variant variant_raw = (clock_seq_hi_and_reserved >> 5) result = nil if (variant_raw >> 2) == 0 result = 0x000 elsif (variant_raw >> 1) == 2 result = 0x100 else result = variant_raw end return (result >> 6) end |
#version ⇒ Object
Returns the UUID version type. Possible values: 1 - Time-based with unique or random host identifier 2 - DCE Security version (with POSIX UIDs) 3 - Name-based (MD5 hash) 4 - Random 5 - Name-based (SHA-1 hash)
334 335 336 |
# File 'lib/uuidtools.rb', line 334 def version return (time_hi_and_version >> 12) end |