usr/src/lib/libast/i386/include/ast/hashkey.h

   1
   2 /* : : generated by proto : : */
   3 /***********************************************************************
   4 *                                                                      *
   5 *               This software is part of the ast package               *
   6 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   7 *                      and is licensed under the                       *
   8 *                  Common Public License, Version 1.0                  *
   9 *                    by AT&T Intellectual Property                     *
  10 *                                                                      *
  11 *                A copy of the License is available at                 *
  12 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  13 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  14 *                                                                      *
  15 *              Information and Software Systems Research               *
  16 *                            AT&T Research                             *
  17 *                           Florham Park NJ                            *
  18 *                                                                      *
  19 *                 Glenn Fowler <gsf@research.att.com>                  *
  20 *                  David Korn <dgk@research.att.com>                   *
  21 *                   Phong Vo <kpv@research.att.com>                    *
  22 *                                                                      *
  23 ***********************************************************************/
  24
  25 /*
  26  * Glenn Fowler
  27  * AT&T Research
  28  *
  29  * 1-6 char lower-case keyword -> long hash
  30  * digit args passed as HASHKEYN('2')
  31  */
  32
  33 #ifndef _HASHKEY_H
  34 #if !defined(__PROTO__)
  35 #include <prototyped.h>
  36 #endif
  37 #if !defined(__LINKAGE__)
  38 #define __LINKAGE__             /* 2004-08-11 transition */
  39 #endif
  40
  41 #define _HASHKEY_H
  42
  43 #define HASHKEYMAX                      6
  44 #define HASHKEYBIT                      5
  45 #define HASHKEYOFF                      ('a'-1)
  46 #define HASHKEYPART(h,c)                (((h)<<HASHKEYBIT)+HASHKEY1(c))
  47
  48 #define HASHKEYN(n)                     ((n)-'0'+'z'+1)
  49
  50 #define HASHKEY1(c1)                    ((c1)-HASHKEYOFF)
  51 #define HASHKEY2(c1,c2)                 HASHKEYPART(HASHKEY1(c1),c2)
  52 #define HASHKEY3(c1,c2,c3)              HASHKEYPART(HASHKEY2(c1,c2),c3)
  53 #define HASHKEY4(c1,c2,c3,c4)           HASHKEYPART(HASHKEY3(c1,c2,c3),c4)
  54 #define HASHKEY5(c1,c2,c3,c4,c5)        HASHKEYPART(HASHKEY4(c1,c2,c3,c4),c5)
  55 #define HASHKEY6(c1,c2,c3,c4,c5,c6)     HASHKEYPART(HASHKEY5(c1,c2,c3,c4,c5),c6)
  56
  57 #define HASHNKEY1(n,c1)                 HASHKEY2((n)+HASHKEYOFF,c1)
  58 #define HASHNKEY2(n,c2,c1)              HASHKEY3((n)+HASHKEYOFF,c2,c1)
  59 #define HASHNKEY3(n,c3,c2,c1)           HASHKEY4((n)+HASHKEYOFF,c3,c2,c1)
  60 #define HASHNKEY4(n,c4,c3,c2,c1)        HASHKEY5((n)+'a',c4,c3,c2,c1)
  61 #define HASHNKEY5(n,c5,c4,c3,c2,c1)     HASHKEY6((n)+'a',c5,c4,c3,c2,c1)
  62
  63 #if _BLD_ast && defined(__EXPORT__)
  64 #undef __MANGLE__
  65 #define __MANGLE__ __LINKAGE__          __EXPORT__
  66 #endif
  67
  68 extern __MANGLE__ long  strkey __PROTO__((const char*));
  69
  70 #undef __MANGLE__
  71 #define __MANGLE__ __LINKAGE__
  72
  73 #endif