Hi Tomas,
Thanks for clarifying. I will use PtrUInt to store the pointer address in. BTW: the documentation it says not to use PtrInt because it's signed and therefore smaller than a pointer (as in max value). Also there seems to be an error in the documentation. On http://www.freepascal.org/docs-html/rtl/system/ptruint.html [4] it is described that PtrUInt is an alias to DWord. However, it depends on the architecture which type it actually is. Could someone please correct the docs? TIA Regards, Darius On 1 okt '12, Tomas Hajny wrote: > On Mon, October 1, 2012 10:43, dhkblas...@zeelandnet.nl [1]wrote: > > Hi, > >> I want to ask if casting an integer to a pointer is valid over all platforms. See below: p: PInteger; v: longint; [...] v := 4235423; p := PInteger(v); Of course, the value of the pointer adress may vary, but in general is this a valid way to assign a pointer? Or will some platforms or architecture give problems? > > Use PtrInt (signed) or PtrUInt (unsigned) types instead of longint, etc. > The former two are guaranteed to work for all architectures and platforms. > Your particular example fails on all 64-bit architectures (among others) > immediately. > > Tomas > > _______________________________________________ > fpc-pascal maillist - fpc-pascal@lists.freepascal.org [2] > http://lists.freepascal.org/mailman/listinfo/fpc-pascal [3] Links: ------ [1] mailto:dhkblas...@zeelandnet.nl [2] mailto:fpc-pascal@lists.freepascal.org [3] http://lists.freepascal.org/mailman/listinfo/fpc-pascal [4] http://www.freepascal.org/docs-html/rtl/system/ptruint.html
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