From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,8b691ded59393771 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2002-08-22 16:30:03 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!bloom-beacon.mit.edu!nycmny1-snh1.gtei.net!cpk-news-hub1.bbnplanet.com!news.gtei.net!prodigy.com!newsmst01.news.prodigy.com!prodigy.com!postmaster.news.prodigy.com!newssvr14.news.prodigy.com.POSTED!3bae8248!not-for-mail From: tmoran@acm.org Newsgroups: comp.lang.ada Subject: Re: Wrapping / Interfacing to C macros References: X-Newsreader: Tom's custom newsreader Message-ID: NNTP-Posting-Host: 67.115.106.103 X-Complaints-To: abuse@prodigy.net X-Trace: newssvr14.news.prodigy.com 1030058976 ST000 67.115.106.103 (Thu, 22 Aug 2002 19:29:36 EDT) NNTP-Posting-Date: Thu, 22 Aug 2002 19:29:36 EDT Organization: Prodigy Internet http://www.prodigy.com X-UserInfo1: [[PGGTSDZRRQBQH]]RKB_UDAZZ\DPCPDLXUNNHLHQAVTUZ]CLNTCPFK[WDXDHV[K^FCGJCJLPF_D_NCC@FUG^Q\DINVAXSLIFXYJSSCCALP@PB@\OS@BITWAH\CQZKJMMD^SJA^NXA\GVLSRBD^M_NW_F[YLVTWIGAXAQBOATKBBQRXECDFDMQ\DZFUE@\JM Date: Thu, 22 Aug 2002 23:29:36 GMT Xref: archiver1.google.com comp.lang.ada:28326 Date: 2002-08-22T23:29:36+00:00 List-Id: What's wrong with: use type Interfaces.C.Unsigned; function Shift_Left(Value : Interfaces.C.Unsigned; Amount: Natural) return Interfaces.C.Unsigned is -- Note: Here we assume Interfaces.C.Unsigned is 32 bits V : constant Interfaces.Unsigned_32 := Interfaces.Unsigned_32(Value); begin return Interfaces.C.Unsigned(Interfaces.Shift_Left(V, Amount)); end Shift_Left; IOC_IN : constant Interfaces.C.Unsigned := IOCPARM_MASK : constant Interfaces.C.Unsigned := - #define _IOW(x,y,t) (IOC_IN|((sizeof(t)&IOCPARM_MASK)<<16)|((x)<<8)|y) function IOW(x : Character; y : Interfaces.C.Unsigned; Size : Interfaces.C.Unsigned) return Interfaces.C.Unsigned is begin return IOC_IN or Shift_Left(Size and IOCPARM_MASK, 16) or Shift_Left(Character'pos(x), 8) or y; end IOW; -- other macros similarly --#define SIOCSHIWAT _IOW('s', 0, int) /* set high watermark */ SIOCSHIWAT : constant Interfaces.C.Unsigned := IOW('s', 0, Interfaces.C.Int'size/Interfaces.C.CHAR_BIT);