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instance method

Gem::SafeMarshal::Reader#read_count

read_count

lib/rubygems/safe_marshal/reader.rb View on GitHub ↗

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/safe_marshal/reader.rb, line 103
def read_count
  count = read_integer
  raise NegativeLengthError if count < 0
  remaining = @io.size - @io.pos
  raise LengthTooLongError, "expected #{count} elements, but only #{remaining} bytes remain" if count > remaining
  count
end

Reads an element count and validates it against the number of bytes remaining in the input, since each element to be read consumes at least one byte. This prevents allocating huge backing stores for maliciously crafted lengths that could never be satisfied.

See also #read_class_or_module #read_data #read_class #read_element

‹ prev#read_class_or_module next ›#read_data