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files >> //opt/alt/ruby32/share/ruby/psych/scalar_scanner.rb
# frozen_string_literal: true module Psych ### # Scan scalars for built in types class ScalarScanner # Taken from http://yaml.org/type/timestamp.html TIME = /^-?\d{4}-\d{1,2}-\d{1,2}(?:[Tt]|\s+)\d{1,2}:\d\d:\d\d(?:\.\d*)?(?:\s*(?:Z|[-+]\d{1,2}:?(?:\d\d)?))?$/ # Taken from http://yaml.org/type/float.html # Base 60, [-+]inf and NaN are handled separately FLOAT = /^(?:[-+]?([0-9][0-9_,]*)?\.[0-9]*([eE][-+][0-9]+)?(?# base 10))$/x # Taken from http://yaml.org/type/int.html INTEGER_STRICT = /^(?:[-+]?0b[0-1_]+ (?# base 2) |[-+]?0[0-7_]+ (?# base 8) |[-+]?(0|[1-9][0-9_]*) (?# base 10) |[-+]?0x[0-9a-fA-F_]+ (?# base 16))$/x # Same as above, but allows commas. # Not to YML spec, but kept for backwards compatibility INTEGER_LEGACY = /^(?:[-+]?0b[0-1_,]+ (?# base 2) |[-+]?0[0-7_,]+ (?# base 8) |[-+]?(?:0|[1-9](?:[0-9]|,[0-9]|_[0-9])*) (?# base 10) |[-+]?0x[0-9a-fA-F_,]+ (?# base 16))$/x attr_reader :class_loader # Create a new scanner def initialize class_loader, strict_integer: false @symbol_cache = {} @class_loader = class_loader @strict_integer = strict_integer end # Tokenize +string+ returning the Ruby object def tokenize string return nil if string.empty? return @symbol_cache[string] if @symbol_cache.key?(string) integer_regex = @strict_integer ? INTEGER_STRICT : INTEGER_LEGACY # Check for a String type, being careful not to get caught by hash keys, hex values, and # special floats (e.g., -.inf). if string.match?(%r{^[^\d.:-]?[[:alpha:]_\s!@#$%\^&*(){}<>|/\\~;=]+}) || string.match?(/\n/) return string if string.length > 5 if string.match?(/^[^ytonf~]/i) string elsif string == '~' || string.match?(/^null$/i) nil elsif string.match?(/^(yes|true|on)$/i) true elsif string.match?(/^(no|false|off)$/i) false else string end elsif string.match?(TIME) begin parse_time string rescue ArgumentError string end elsif string.match?(/^\d{4}-(?:1[012]|0\d|\d)-(?:[12]\d|3[01]|0\d|\d)$/) require 'date' begin class_loader.date.strptime(string, '%F', Date::GREGORIAN) rescue ArgumentError string end elsif string.match?(/^\+?\.inf$/i) Float::INFINITY elsif string.match?(/^-\.inf$/i) -Float::INFINITY elsif string.match?(/^\.nan$/i) Float::NAN elsif string.match?(/^:./) if string =~ /^:(["'])(.*)\1/ @symbol_cache[string] = class_loader.symbolize($2.sub(/^:/, '')) else @symbol_cache[string] = class_loader.symbolize(string.sub(/^:/, '')) end elsif string.match?(/^[-+]?[0-9][0-9_]*(:[0-5]?[0-9]){1,2}$/) i = 0 string.split(':').each_with_index do |n,e| i += (n.to_i * 60 ** (e - 2).abs) end i elsif string.match?(/^[-+]?[0-9][0-9_]*(:[0-5]?[0-9]){1,2}\.[0-9_]*$/) i = 0 string.split(':').each_with_index do |n,e| i += (n.to_f * 60 ** (e - 2).abs) end i elsif string.match?(FLOAT) if string.match?(/\A[-+]?\.\Z/) string else Float(string.delete(',_').gsub(/\.([Ee]|$)/, '\1')) end elsif string.match?(integer_regex) parse_int string else string end end ### # Parse and return an int from +string+ def parse_int string Integer(string.delete(',_')) end ### # Parse and return a Time from +string+ def parse_time string klass = class_loader.load 'Time' date, time = *(string.split(/[ tT]/, 2)) (yy, m, dd) = date.match(/^(-?\d{4})-(\d{1,2})-(\d{1,2})/).captures.map { |x| x.to_i } md = time.match(/(\d+:\d+:\d+)(?:\.(\d*))?\s*(Z|[-+]\d+(:\d\d)?)?/) (hh, mm, ss) = md[1].split(':').map { |x| x.to_i } us = (md[2] ? Rational("0.#{md[2]}") : 0) * 1000000 time = klass.utc(yy, m, dd, hh, mm, ss, us) return time if 'Z' == md[3] return klass.at(time.to_i, us) unless md[3] tz = md[3].match(/^([+\-]?\d{1,2})\:?(\d{1,2})?$/)[1..-1].compact.map { |digit| Integer(digit, 10) } offset = tz.first * 3600 if offset < 0 offset -= ((tz[1] || 0) * 60) else offset += ((tz[1] || 0) * 60) end klass.new(yy, m, dd, hh, mm, ss+us/(1_000_000r), offset) end end end
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