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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!news.mel.connect.com.au!munnari.OZ.AU!news.ecn.uoknor.edu!feed1.news.erols.com!howland.erols.net!www.nntp.primenet.com!nntp.primenet.com!nntp.uio.no!news.apfel.de!nntp.zit.th-darmstadt.de!fu-berlin.de!cs.tu-berlin.de!js From: js@cs.tu-berlin.de (Joerg Schilling) Newsgroups: comp.unix.solaris,comp.unix.bsd.misc,comp.unix.internals Subject: Re: Solaris 2.6 Date: 7 Dec 1996 12:27:12 GMT Organization: Technical University of Berlin, Germany Lines: 33 Distribution: inet Message-ID: <58bnr0$q9q$1@news.cs.tu-berlin.de> References: <32986299.AC7@mail.esrin.esa.it> <casper.329d5a07@mail.fwi.uva.nl> <5869r2$175$1@asgard.sprintlink.co.za> <587shd$2sb@anorak.coverform.lan> NNTP-Posting-Host: 130.149.17.8 Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Xref: euryale.cc.adfa.oz.au comp.unix.solaris:91713 comp.unix.bsd.misc:1722 comp.unix.internals:11503 In article <587shd$2sb@anorak.coverform.lan>, Brian Somers <brian%anorak.coverform.lan@awfulhak.demon.co.uk> wrote: >In article <5869r2$175$1@asgard.sprintlink.co.za>, > philips@asiatech.co.za (philip Shearer) writes: >: I don't see why anyone needs to store pointers as ints or longs >: store the them as pointers. > >How do you align a pointer if you can't cast it to some kind of number ? On any two's complement machine this can easily be done, if sizeof (alignement type) < sizeof (int) You may check this out by replacing the cast to int by a cast to char in the folloging code. Joerg #define ALIGN_DOUBLE 8 /* alignment value for (double *) */ #define ALIGN_DMASK 7 /* alignment mask for (double *) */ #define xaligned(a, s) ((((int)(a)) & s) == 0 ) #define x2aligned(a, b, s) (((((int)(a)) | ((int)(b))) & s) == 0 ) #define xalign(x, a, m) ( ((char *)(x)) + ( (a) - (((int)(x))&(m))) ) #define daligned(a) xaligned(a, ALIGN_DMASK) #define d2aligned(a, b) x2aligned(a, b, ALIGN_DMASK) #define dalign(x) xalign((x), ALIGN_DOUBLE, ALIGN_DMASK) -- EMail: joerg@schily.isdn.cs.tu-berlin.de (home) Jörg Schilling D-13353 Berlin js@cs.tu-berlin.de (uni) If you don't have iso-8859-1 jes@fokus.gmd.de (work) chars my name is URL: http://www.fokus.gmd.de/usr/schilling J"org Schilling