I suppose you have to allocate memory and create a pointer to a pointer to this memory which you pass to the function. On 16 Apr 2017 4:58 PM, "fredvs" <fi...@hotmail.com> 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; > > OK, the function seems to work because the result = 0 (no error). > > But how to retrieve the data icy_meta (PPChar) ? > > var > theicytag : PPChar; > resu : integer; > ... > > resu := mpg123_icy(ahandle, theicytag); > if resu = 0 then writeln(theicytag^); --> raise exception + crash > > resu := mpg123_icy(ahandle, theicytag); > if resu = 0 then writeln(theicytag^^); --> also raise exception + crash > > Fre;D > > > > > > ----- > Many thanks ;-) > -- > View this message in context: http://free-pascal-general. > 1045716.n5.nabble.com/Get-value-of-PPChar-tp5728277.html > Sent from the Free Pascal - General mailing list archive at Nabble.com. > _______________________________________________ > fpc-pascal maillist - fpc-pascal@lists.freepascal.org > http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
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