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src: convert BE-utf16-string to LE before search #3295

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src: convert BE-utf16-string to LE before search #3295

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26 changes: 21 additions & 5 deletions src/node_buffer.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -842,11 +842,27 @@ void IndexOfString(const FunctionCallbackInfo<Value>& args) {
return args.GetReturnValue().Set(-1);
}

result = SearchString(reinterpret_cast<const uint16_t*>(haystack),
haystack_length / 2,
reinterpret_cast<const uint16_t*>(*needle_value),
needle_value.length(),
offset / 2);
if (IsBigEndian()) {
StringBytes::InlineDecoder decoder;
decoder.Decode(Environment::GetCurrent(args), needle, args[3], UCS2);
const uint16_t* decoded_string =
reinterpret_cast<const uint16_t*>(decoder.out());

if (decoded_string == nullptr)
return args.GetReturnValue().Set(-1);

result = SearchString(reinterpret_cast<const uint16_t*>(haystack),
haystack_length / 2,
decoded_string,
decoder.size() / 2,
offset / 2);
} else {
result = SearchString(reinterpret_cast<const uint16_t*>(haystack),
haystack_length / 2,
reinterpret_cast<const uint16_t*>(*needle_value),
needle_value.length(),
offset / 2);
}
result *= 2;
} else if (enc == UTF8) {
String::Utf8Value needle_value(needle);
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