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Update the coderange after overwrite #79

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Merged
merged 1 commit into from
Jan 16, 2024
Merged

Update the coderange after overwrite #79

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6 changes: 6 additions & 0 deletions ext/stringio/stringio.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1464,8 +1464,14 @@ strio_write(VALUE self, VALUE str)
}
}
else {
int cr0 = ENC_CODERANGE(ptr->string);
int cr = ENC_CODERANGE_UNKNOWN;
if (rb_enc_asciicompat(enc) && rb_enc_asciicompat(enc2)) {
cr = ENC_CODERANGE_AND(cr0, ENC_CODERANGE(str));
}
strio_extend(ptr, ptr->pos, len);
memmove(RSTRING_PTR(ptr->string)+ptr->pos, RSTRING_PTR(str), len);
if (cr != cr0) ENC_CODERANGE_SET(ptr->string, cr);
}
RB_GC_GUARD(str);
ptr->pos += len;
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10 changes: 10 additions & 0 deletions test/stringio/test_stringio.rb
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Expand Up @@ -953,6 +953,16 @@ def test_binary_encoding_read_and_default_internal
$VERBOSE = verbose
end

def test_coderange_after_overwrite
s = StringIO.new("".b)

s.write("a=b&c=d")
s.rewind
assert_predicate(s.string, :ascii_only?)
s.write "\u{431 43e 433 443 441}"
assert_not_predicate(s.string, :ascii_only?)
end

def assert_string(content, encoding, str, mesg = nil)
assert_equal([content, encoding], [str, str.encoding], mesg)
end
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