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[ruby/openssl] read: don't clear buffer when nothing can be read

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To be consistent with regular Ruby IOs:

```ruby
r, _ = IO.pipe
buf = "garbage".b
r.read_nonblock(10, buf, exception: false) # => :wait_readable
p buf # => "garbage"
```

Ref: 98b8944460

https://github.com/ruby/openssl/commit/08452993d6
This commit is contained in:
Jean Boussier 2024-04-16 14:52:58 +02:00 committed by git
parent fca6c55a53
commit 7d42010fad
2 changed files with 12 additions and 5 deletions
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8
ext/openssl/ossl_ssl.c
View File

@ -1958,9 +1958,11 @@ ossl_ssl_read_internal(int argc, VALUE *argv, VALUE self, int nonblock)
else
rb_str_modify_expand(str, ilen - RSTRING_LEN(str));
}
rb_str_set_len(str, 0);
if (ilen == 0)
return str;
if (ilen == 0) {
rb_str_set_len(str, 0);
return str;
}
VALUE io = rb_attr_get(self, id_i_io);

9
test/openssl/test_pair.rb
View File

@ -250,12 +250,17 @@ module OpenSSL::TestPairM
buf = +"garbage"
assert_equal :wait_readable, s2.read_nonblock(100, buf, exception: false)
assert_equal "", buf
assert_equal "garbage", buf
s1.close
buf = +"garbage"
assert_equal nil, s2.read(100, buf)
assert_nil s2.read(100, buf)
assert_equal "", buf
buf = +"garbage"
ret = s2.read(0, buf)
assert_same buf, ret
assert_equal "", ret
}
end