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I vote for abstract "streaming writer" callback, no FILE* streams but something like: typedef int (*PFNOUTPUTCALLBACK)(void *UserData, utf8Byte *buf, int cBytes, int *cBytesWritten); which writer calls with every buffer it wants to write out (you can use fwrite or whatever here). buf has cBytes it wants to write, set cBytesWritten to actual byte count that gets written. Returns some error value etc. You could also wrap for example gnu libiconv calls in this callback to output in different encoding than UTF-8/16 (of course you have to work with UTF-8/wchar internally for name char checking etc.). There could be FILE* stream callback and maybe libiconv callback provided "in the box" for genx? I also vote for passing strlen (or -1 when you pass NUL terminated string) for pcdata callbacks. with respect, Toni Uusitalo
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