# frozen_string_literal: true

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require 'objspace.so'

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module ObjectSpace

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class << self

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private :_dump

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private :_dump_all

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end

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module_function

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# call-seq:

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# ObjectSpace.dump(obj[, output: :string]) # => "{ ... }"

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# ObjectSpace.dump(obj, output: :file) # => #<File:/tmp/rubyobj20131125-88733-1xkfmpv.json>

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# ObjectSpace.dump(obj, output: :stdout) # => nil

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#

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# Dump the contents of a ruby object as JSON.

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#

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# This method is only expected to work with C Ruby.

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# This is an experimental method and is subject to change.

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# In particular, the function signature and output format are

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# not guaranteed to be compatible in future versions of ruby.

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def dump(obj, output: :string)

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out = case output

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when :file, nil

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require 'tempfile'

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Tempfile.create(%w(rubyobj .json))

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when :stdout

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STDOUT

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when :string

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+''

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when IO

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output

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else

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raise ArgumentError, "wrong output option: #{output.inspect}"

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end

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ret = _dump(obj, out)

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return nil if output == :stdout

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ret

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end

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# call-seq:

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# ObjectSpace.dump_all([output: :file]) # => #<File:/tmp/rubyheap20131125-88469-laoj3v.json>

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# ObjectSpace.dump_all(output: :stdout) # => nil

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# ObjectSpace.dump_all(output: :string) # => "{...}\n{...}\n..."

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# ObjectSpace.dump_all(output:

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# File.open('heap.json','w')) # => #<File:heap.json>

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# ObjectSpace.dump_all(output: :string,

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# since: 42) # => "{...}\n{...}\n..."

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#

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# Dump the contents of the ruby heap as JSON.

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#

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# _since_ must be a non-negative integer or +nil+.

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#

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# If _since_ is a positive integer, only objects of that generation and

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# newer generations are dumped. The current generation can be accessed using

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# GC::count.

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#

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# Objects that were allocated without object allocation tracing enabled

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# are ignored. See ::trace_object_allocations for more information and

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# examples.

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#

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# If _since_ is omitted or is +nil+, all objects are dumped.

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#

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# This method is only expected to work with C Ruby.

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# This is an experimental method and is subject to change.

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# In particular, the function signature and output format are

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# not guaranteed to be compatible in future versions of ruby.

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def dump_all(output: :file, full: false, since: nil)

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out = case output

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when :file, nil

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require 'tempfile'

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Tempfile.create(%w(rubyheap .json))

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when :stdout

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STDOUT

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when :string

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+''

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when IO

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output

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else

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raise ArgumentError, "wrong output option: #{output.inspect}"

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end

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ret = _dump_all(out, full, since)

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return nil if output == :stdout

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ret

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end

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end

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