napi get value string utf16

napi_status napi_get_value_string_utf16(napi_env env,
                                        napi_value value,
                                        char16_t* buf,
                                        size_t bufsize,
                                        size_t* result)

• [in] env: The environment that the API is invoked under.
• [in] value: napi_value representing JavaScript string.
• [in] buf: Buffer to write the UTF16-LE-encoded string into. If NULL is passed in, the length of the string in 2-byte code units and excluding the null terminator is returned.
• [in] bufsize: Size of the destination buffer. When this value is insufficient, the returned string is truncated and null-terminated.
• [out] result: Number of 2-byte code units copied into the buffer, excluding the null terminator.

Returns napi_ok if the API succeeded. If a non-String napi_value is passed in it returns napi_string_expected.

This API returns the UTF16-encoded string corresponding the value passed in.