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Let the index boundary check in rb_enc_from_index be flagged as unlikely

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[Misc #15806]

Closes: https://github.com/ruby/ruby/pull/2128
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Lourens Naudé 2019-04-13 17:39:05 +01:00 • committed by Nobuyoshi Nakada
parent 6546aed475
commit 009ec37a47
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encoding.c
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@ -608,7 +608,7 @@ rb_enc_init(void)
rb_encoding *
rb_enc_from_index(int index)
{
if (index < 0 || enc_table.count <= (index &= ENC_INDEX_MASK)) {
if (UNLIKELY(index < 0 || enc_table.count <= (index &= ENC_INDEX_MASK))) {
return 0;
}
return enc_table.list[index].enc;