align C ported memsearch code - need to handle array[length] properly#5037
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align C ported memsearch code - need to handle array[length] properly#5037
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... otherwise code doing utf8 str scan might fail with array-out-of-index resolves GH-2036
headius
approved these changes
Feb 13, 2018
| h = '\0'; // (C) ary end - due y+m at rb_memsearch_qs_utf8 | ||
| } | ||
| if (h < 0xC0) { | ||
| return h + 256; |
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This will always return 256 at string end...is that correct?
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yep - should return the very same as the (original) C code when reaching \0 boundary
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... otherwise code doing utf8 str scan might fail with array-out-of-index
resolves GH-5036
someone with C knowledge please review, seems to me that MRI handles the case without special care :
at
rb_memsearch_qs_utf8_hash(byte[] xBytes, final int x)whilex == xBytes.length