1da2e3ebdSchin /*********************************************************************** 2da2e3ebdSchin * * 3da2e3ebdSchin * This software is part of the ast package * 4*b30d1939SAndy Fiddaman * Copyright (c) 1985-2011 AT&T Intellectual Property * 5da2e3ebdSchin * and is licensed under the * 6*b30d1939SAndy Fiddaman * Eclipse Public License, Version 1.0 * 77c2fbfb3SApril Chin * by AT&T Intellectual Property * 8da2e3ebdSchin * * 9da2e3ebdSchin * A copy of the License is available at * 10*b30d1939SAndy Fiddaman * http://www.eclipse.org/org/documents/epl-v10.html * 11*b30d1939SAndy Fiddaman * (with md5 checksum b35adb5213ca9657e911e9befb180842) * 12da2e3ebdSchin * * 13da2e3ebdSchin * Information and Software Systems Research * 14da2e3ebdSchin * AT&T Research * 15da2e3ebdSchin * Florham Park NJ * 16da2e3ebdSchin * * 17da2e3ebdSchin * Glenn Fowler <gsf@research.att.com> * 18da2e3ebdSchin * David Korn <dgk@research.att.com> * 19da2e3ebdSchin * Phong Vo <kpv@research.att.com> * 20da2e3ebdSchin * * 21da2e3ebdSchin ***********************************************************************/ 22da2e3ebdSchin #pragma prototyped 23da2e3ebdSchin /* 24da2e3ebdSchin * Glenn Fowler 25da2e3ebdSchin * Landon Kurt Knoll 26da2e3ebdSchin * Phong Vo 27da2e3ebdSchin * 28da2e3ebdSchin * FNV-1 linear congruent checksum/hash/PRNG 29da2e3ebdSchin * see http://www.isthe.com/chongo/tech/comp/fnv/ 30da2e3ebdSchin */ 31da2e3ebdSchin 32da2e3ebdSchin #ifndef _FNV_H 33da2e3ebdSchin #define _FNV_H 34da2e3ebdSchin 35da2e3ebdSchin #include <ast_common.h> 36da2e3ebdSchin 37da2e3ebdSchin #define FNV_INIT 0x811c9dc5L 38da2e3ebdSchin #define FNV_MULT 0x01000193L 39da2e3ebdSchin 40da2e3ebdSchin #define FNVINIT(h) (h = FNV_INIT) 41da2e3ebdSchin #define FNVPART(h,c) (h = (h) * FNV_MULT ^ (c)) 42da2e3ebdSchin #define FNVSUM(h,s,n) do { \ 43da2e3ebdSchin register size_t _i_ = 0; \ 44da2e3ebdSchin while (_i_ < n) \ 45da2e3ebdSchin FNVPART(h, ((unsigned char*)s)[_i_++]); \ 46da2e3ebdSchin } while (0) 47da2e3ebdSchin 48da2e3ebdSchin #if _typ_int64_t 49da2e3ebdSchin 50da2e3ebdSchin #ifdef _ast_LL 51da2e3ebdSchin 52da2e3ebdSchin #define FNV_INIT64 0xcbf29ce484222325LL 53da2e3ebdSchin #define FNV_MULT64 0x00000100000001b3LL 54da2e3ebdSchin 55da2e3ebdSchin #else 56da2e3ebdSchin 57da2e3ebdSchin #define FNV_INIT64 ((int64_t)0xcbf29ce484222325) 58da2e3ebdSchin #define FNV_MULT64 ((int64_t)0x00000100000001b3) 59da2e3ebdSchin 60da2e3ebdSchin #endif 61da2e3ebdSchin 62da2e3ebdSchin #define FNVINIT64(h) (h = FNV_INIT64) 63da2e3ebdSchin #define FNVPART64(h,c) (h = (h) * FNV_MULT64 ^ (c)) 64da2e3ebdSchin #define FNVSUM64(h,s,n) do { \ 65da2e3ebdSchin register int _i_ = 0; \ 66da2e3ebdSchin while (_i_ < n) \ 67da2e3ebdSchin FNVPART64(h, ((unsigned char*)s)[_i_++]); \ 68da2e3ebdSchin } while (0) 69da2e3ebdSchin 70da2e3ebdSchin #endif 71da2e3ebdSchin 72da2e3ebdSchin #endif 73