c_extensions/c_utilities.rb

tests/_examples/c_extensions/c_utilities.rb in the metorex repository.

# A C extension reading keywords and its block through rb_scan_args, taking
# keywords out of a Hash with rb_get_kwargs, breaking out of the block that
# called it, naming where it was called from, and reading numbers with
# ruby_strtod.
require "tmpdir"
require_relative "build_helper"

directory = Dir.mktmpdir
require(build_extension("c_utilities.c", "c_utilities", directory))
utilities = CUtilities.new
action = -> { :acted }

p(utilities.scanned(1, size: 2))
report { utilities.scanned(1, { size: 2 }) }
p(utilities.scanned(size: 2).first(3))
used = utilities.scanned(&action)
p([used[0], used[1], used[2], used[3].equal?(action), used[4]])
report { utilities.scanned(1, 2) }
p(utilities.scanned_last_hash({ size: 2 }))
p(utilities.scanned_last_hash(3))
report { utilities.block_proc }
p(utilities.block_proc(&action).equal?(action))

held = { a: 1, b: 2, c: 3 }
p(utilities.keywords(held, [:b, :a], 2, -1))
p(held)
p(utilities.keywords({ a: 1 }, [:a, :z], 1, 1))
p(utilities.keywords(nil, [:a, :b], 0, 2)[0])
report { utilities.keywords({}, [:a, :b], 2, 0) }
report { utilities.keywords({ a: 1, x: 2, y: 3 }, [:a], 1, 0) }
report { utilities.keywords({ a: 1, x: 2 }, [:a], 1, 0) }
p(utilities.keywords_present({ a: 1 }, :a))
report { utilities.keywords_present({ b: 1 }, :a) }

p([1, 2, 3].each { |number| utilities.stop(:stopped) if number == 2 })
p([1, 2, 3].map { |number| number == 2 ? utilities.stop_plain : number })
outcome = [1, 2].map do |outer|
  [10, 20].each { |inner| utilities.stop_plain if inner == 20 }
  outer
end
p(outcome)

file, line = utilities.where
p [File.basename(file).sub("_no_parens", ""), line == __LINE__ - 1]
p(utilities.narrowed(2**31 - 1))
report { utilities.narrowed(2**31) }
report { utilities.narrowed(-2**31 - 1) }

["14.25test", "  -3e2x", "+", "test", "1e", "0.", "000", ".5", "0x1Ap1rest", "0x.8", "0x", "0xg", "1e400", "0x0", "-0x10p-1"].each do |text|
  p([text, utilities.parsed(text)])
end

source = { kept: 1 }
copy = utilities.copied(source)
p([copy, copy.equal?(source)])

FileUtils.rm_rf(directory)

Output:

[1, 1, {size: 2}, nil, true]
ArgumentError: wrong number of arguments (given 2, expected 0..1)
[0, nil, {size: 2}]
[0, nil, nil, true, false]
ArgumentError: wrong number of arguments (given 2, expected 0..1)
[nil, {size: 2}]
[3, nil]
ArgumentError: tried to create Proc object without a block
true
[2, 2, 1]
{c: 3}
[1, 1, nil]
0
ArgumentError: missing keywords: :a, :b
ArgumentError: unknown keywords: :x, :y
ArgumentError: unknown keyword: :x
1
ArgumentError: unknown keyword: :b
:stopped
nil
[1, 2]
["c_utilities.rb", true]
2147483647
RangeError: integer 2147483648 too big to convert to 'int'
RangeError: integer -2147483649 too small to convert to 'int'
["14.25test", [14.25, "test"]]
["  -3e2x", [-300.0, "x"]]
["+", [0.0, "+"]]
["test", [0.0, "test"]]
["1e", [1.0, "e"]]
["0.", [0.0, ""]]
["000", [0.0, ""]]
[".5", [0.5, ""]]
["0x1Ap1rest", [52.0, "rest"]]
["0x.8", [0.5, ""]]
["0x", [0.0, "0x"]]
["0xg", [0.0, "0xg"]]
["1e400", [Infinity, ""]]
["0x0", [0.0, ""]]
["-0x10p-1", [-8.0, ""]]
[{kept: 1}, false]