On 16.04.2017 16:58, fredvs wrote: > Hello. > > A C method is defined like this: > > MPG123_EXPORT int mpg123_icy(mpg123_handle *mh, char **icy_meta); > > and translated in Pascal with this: > > function mpg123_icy(mh: Tmpg123_handle; var icy_meta: PPChar): integer; > cdecl;
This is wrong. "var" essentially results in a "char***". What you want is either function mpg123_icy(mh: Tmpg123_handle; icy_meta: PPChar): integer; cdecl; or function mpg123_icy(mh: Tmpg123_handle; var icy_meta: PChar): Integer; cdecl; And how you'll need to use it will depend upon the function's documentation: if the function will allocate the buffer then you simply need to pass in a PChar variable (second case) or a pointer to one (first case). If you need to allocate the buffer yourself then you first need to do a GetMem with an appropriate size before you do the same. Regards, Sven _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
