Hi! Am Donnerstag, den 13.09.2012, 15:45 +0200 schrieb Jonas Maebe: > Guillermo Martínez Jiménez wrote on Thu, 13 Sep 2012: > > >> On 12 Sep 2012, at 19:11, Johann Glaser wrote: > >> > >>> Can I translate this 1:1, i.e., define an Enum in Pascal and just ignore > >>> the compiler warnings about reused values? > >>> > >>> Or should I rather define all these types as Integer and define > >>> constants for all values? > >> > >> It depends on whether you need arithmetic or not. If you do, use > >> integer constants, otherwise you can use an enum. > > > > Actually you cannot. FPC optimizes enumerations in some cases (i.e. > > in Delphi mode) but GCC uses 32bit for enumerations alwais. > > The size of an enum in gcc depends on whether or not the -fshort-enums > command line option is used, and on the number of bits required to > represent its upper bound value. > > > Anyway you can still use enums, but telling to FPC that you want to > > set its size by directives $PACKENUM and $ENUMSIZE. > > It's $PACKENUM *or* $ENUMSIZE (they affect the same compiler setting) > > Anwyay, yes, that's also what I said the part of my original mail that > you cut away.
Thank you all for your valuable information! I found that libusb doesn't use the enum types anywhere but use uint8_t or int instead. So I use constants for everything now. Only one enum is used (libusb_transfer_status) in two structs, so I replaced it as it was an int. @Stephano: Thanks for the link with contributed units. Actually, one of the USB units is from me, but a bit outdated. When my libusb 1.0 translation (including an OOP wrapper) is done I'll update http://wiki.freepascal.org/Hardware_Access#libusb and the contributed units page again. Thanks Hansi _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
