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Supports buffer and offset in Array#pack

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* pack.c (pack_pack): Supports `buffer` and `offset` in `Array#pack`.
  [Feature #12754] [ruby-dev:49798]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56957 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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usa 2016-12-01 13:08:20 +00:00
parent 74495cfa11
commit 0dd9c302d9
3 changed files with 94 additions and 5 deletions
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34
test/ruby/test_pack.rb
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@ -812,4 +812,38 @@ EXPECTED
assert_raise_with_message(ArgumentError, /too few/) {ary.pack("AA")}
end;
end
def test_pack_with_buffer
buf = String.new(capacity: 100)
assert_raise_with_message(ArgumentError, /without buffer/) {
[0xDEAD_BEEF].pack('N', offset: 10)
}
assert_raise_with_message(ArgumentError, /too small/) {
[0xDEAD_BEEF].pack('N', buffer: buf, offset: 200)
}
assert_raise_with_message(RuntimeError, /frozen/) {
[0xDEAD_BEEF].pack('N', buffer: 'foo'.freeze)
}
assert_raise_with_message(TypeError, /into Integer/) {
[0xDEAD_BEEF].pack('N', buffer: buf, offset: '10')
}
assert_raise_with_message(TypeError, /must be String/) {
[0xDEAD_BEEF].pack('N', buffer: Object.new)
}
addr = [buf].pack('p')
[0xDEAD_BEEF].pack('N', buffer: buf)
assert_equal "\xDE\xAD\xBE\xEF", buf
[0xBABE_F00D].pack('N', buffer: buf, offset: 4)
assert_equal "\xDE\xAD\xBE\xEF\xBA\xBE\xF0\x0D", buf
assert_equal addr, [buf].pack('p')
[0xBAAD_FACE].pack('N', buffer: buf, offset: 10)
assert_equal "\xDE\xAD\xBE\xEF\xBA\xBE\xF0\x0D\0\0\xBA\xAD\xFA\xCE", buf
assert_equal addr, [buf].pack('p')
end
end