iconv() - How to determine the requires size for output buffer?

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In my C++ code, I need to convert Unicode strings to UTF-8 strings using iconv(). Before calling the function, I need to allocate proper buffer size. A couple of examples I have seen overallocate the buffer (for example, two times the length of input string). I am wondering if there is a way to determine the exact size that would be required for the conversion. Regards.

asked 39 secs ago

Peter

845