class Gem::SafeMarshal::Reader
Constants
- EMPTY_ARRAY
- EMPTY_HASH
- EMPTY_STRING
- MARSHAL_VERSION
- OBJECT_LINKS
profiling bundle install –full-index shows that offset 6 is by far the most common object link, so we special case it to avoid allocating a new object a third of the time. the following are all the object links that appear more than 10000 times in my profiling
- STRING_E_SYMBOL
Public Class Methods
new(io)
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# File rubygems/safe_marshal/reader.rb, line 23 def initialize(io) @io = io end
Public Instance Methods
read!()
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# File rubygems/safe_marshal/reader.rb, line 27 def read! read_header root = read_element raise UnconsumedBytesError unless @io.eof? root end
Private Instance Methods
read_array()
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# File rubygems/safe_marshal/reader.rb, line 162 def read_array length = read_integer return EMPTY_ARRAY if length == 0 elements = Array.new(length) do read_element end Elements::Array.new(elements) end
read_bignum()
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# File rubygems/safe_marshal/reader.rb, line 267 def read_bignum sign = read_byte data = @io.read(read_integer * 2) Elements::Bignum.new(sign, data) end
read_byte()
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# File rubygems/safe_marshal/reader.rb, line 44 def read_byte @io.getbyte end
read_class()
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# File rubygems/safe_marshal/reader.rb, line 277 def read_class raise NotImplementedError, "Reading Marshal objects of type class is not implemented" end
read_class_or_module()
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# File rubygems/safe_marshal/reader.rb, line 285 def read_class_or_module raise NotImplementedError, "Reading Marshal objects of type class_or_module is not implemented" end
read_data()
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# File rubygems/safe_marshal/reader.rb, line 289 def read_data raise NotImplementedError, "Reading Marshal objects of type data is not implemented" end
read_element()
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# File rubygems/safe_marshal/reader.rb, line 82 def read_element type = read_byte case type when 34 then read_string # ?" when 48 then read_nil # ?0 when 58 then read_symbol # ?: when 59 then read_symbol_link # ?; when 64 then read_object_link # ?@ when 70 then read_false # ?F when 73 then read_object_with_ivars # ?I when 84 then read_true # ?T when 85 then read_user_marshal # ?U when 91 then read_array # ?[ when 102 then read_float # ?f when 105 then Elements::Integer.new(read_integer) # ?i when 108 then read_bignum # ?l when 111 then read_object # ?o when 117 then read_user_defined # ?u when 123 then read_hash # ?{ when 125 then read_hash_with_default_value # ?} when 101 then read_extended_object # ?e when 99 then read_class # ?c when 109 then read_module # ?m when 77 then read_class_or_module # ?M when 100 then read_data # ?d when 47 then read_regexp # ?/ when 83 then read_struct # ?S when 67 then read_user_class # ?C when nil raise EOFError, "Unexpected EOF" else raise Error, "Unknown marshal type discriminator #{type.chr.inspect} (#{type})" end end
read_extended_object()
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# File rubygems/safe_marshal/reader.rb, line 273 def read_extended_object raise NotImplementedError, "Reading Marshal objects of type extended_object is not implemented" end
read_false()
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# File rubygems/safe_marshal/reader.rb, line 149 def read_false Elements::False::FALSE end
read_float()
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# File rubygems/safe_marshal/reader.rb, line 262 def read_float string = @io.read(read_integer) Elements::Float.new(string) end
read_hash()
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# File rubygems/safe_marshal/reader.rb, line 232 def read_hash length = read_integer return EMPTY_HASH if length == 0 pairs = Array.new(length) do [read_element, read_element] end Elements::Hash.new(pairs) end
read_hash_with_default_value()
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# File rubygems/safe_marshal/reader.rb, line 241 def read_hash_with_default_value pairs = Array.new(read_integer) do [read_element, read_element] end default = read_element Elements::HashWithDefaultValue.new(pairs, default) end
read_header()
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# File rubygems/safe_marshal/reader.rb, line 39 def read_header v = @io.read(2) raise UnsupportedVersionError, "Unsupported marshal version #{v.bytes.map(&:ord).join(".")}, expected #{Marshal::MAJOR_VERSION}.#{Marshal::MINOR_VERSION}" unless v == MARSHAL_VERSION end
read_integer()
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# File rubygems/safe_marshal/reader.rb, line 48 def read_integer b = read_byte case b when 0x00 0 when 0x01 read_byte when 0x02 read_byte | (read_byte << 8) when 0x03 read_byte | (read_byte << 8) | (read_byte << 16) when 0x04 read_byte | (read_byte << 8) | (read_byte << 16) | (read_byte << 24) when 0xFC read_byte | (read_byte << 8) | (read_byte << 16) | (read_byte << 24) | -0x100000000 when 0xFD read_byte | (read_byte << 8) | (read_byte << 16) | -0x1000000 when 0xFE read_byte | (read_byte << 8) | -0x10000 when 0xFF read_byte | -0x100 when nil raise EOFError, "Unexpected EOF" else signed = (b ^ 128) - 128 if b >= 128 signed + 5 else signed - 5 end end end
read_module()
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# File rubygems/safe_marshal/reader.rb, line 281 def read_module raise NotImplementedError, "Reading Marshal objects of type module is not implemented" end
read_nil()
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# File rubygems/safe_marshal/reader.rb, line 258 def read_nil Elements::Nil::NIL end
read_object()
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# File rubygems/safe_marshal/reader.rb, line 249 def read_object name = read_element object = Elements::Object.new(name) ivars = Array.new(read_integer) do [read_element, read_element] end Elements::WithIvars.new(object, ivars) end
read_object_link()
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# File rubygems/safe_marshal/reader.rb, line 224 def read_object_link offset = read_integer OBJECT_LINKS[offset] || Elements::ObjectLink.new(offset) end
read_object_with_ivars()
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# File rubygems/safe_marshal/reader.rb, line 171 def read_object_with_ivars object = read_element ivars = Array.new(read_integer) do [read_element, read_element] end Elements::WithIvars.new(object, ivars) end
read_regexp()
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# File rubygems/safe_marshal/reader.rb, line 293 def read_regexp raise NotImplementedError, "Reading Marshal objects of type regexp is not implemented" end
read_string()
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# File rubygems/safe_marshal/reader.rb, line 138 def read_string length = read_integer return EMPTY_STRING if length == 0 str = @io.read(length) Elements::String.new(str) end
read_struct()
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# File rubygems/safe_marshal/reader.rb, line 297 def read_struct raise NotImplementedError, "Reading Marshal objects of type struct is not implemented" end
read_symbol()
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# File rubygems/safe_marshal/reader.rb, line 120 def read_symbol len = read_integer if len == 1 byte = read_byte if byte == 69 # ?E STRING_E_SYMBOL else Elements::Symbol.new(byte.chr) end else name = -@io.read(len) Elements::Symbol.new(name) end end
read_symbol_link()
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# File rubygems/safe_marshal/reader.rb, line 179 def read_symbol_link offset = read_integer Elements::SymbolLink.new(offset) end
read_true()
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# File rubygems/safe_marshal/reader.rb, line 145 def read_true Elements::True::TRUE end
read_user_class()
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# File rubygems/safe_marshal/reader.rb, line 301 def read_user_class name = read_element wrapped_object = read_element Elements::UserClass.new(name, wrapped_object) end
read_user_defined()
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# File rubygems/safe_marshal/reader.rb, line 153 def read_user_defined name = read_element binary_string = @io.read(read_integer) Elements::UserDefined.new(name, binary_string) end
read_user_marshal()
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# File rubygems/safe_marshal/reader.rb, line 184 def read_user_marshal name = read_element data = read_element Elements::UserMarshal.new(name, data) end