1 /* 2 * [The "BSD licence"] 3 * Copyright (c) 2005-2008 Terence Parr 4 * All rights reserved. 5 * 6 * Conversion to C#: 7 * Copyright (c) 2008 Sam Harwell, Pixel Mine, Inc. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 using System; 34 35 namespace Antlr.Runtime.JavaExtensions 36 { 37 public static class ObjectExtensions 38 { 39 #if DEBUG 40 [Obsolete] 41 public static bool booleanValue( this bool value ) 42 { 43 return value; 44 } 45 46 [Obsolete] 47 public static Type getClass( this object o ) 48 { 49 return o.GetType(); 50 } 51 #endif 52 53 public static int ShiftPrimeXOR( int a, int b ) 54 { 55 int hash = 23; 56 hash = ( ( hash << 5 ) * 37 ) ^ a; 57 hash = ( ( hash << 5 ) * 37 ) ^ b; 58 return hash; 59 } 60 61 public static int ShiftPrimeXOR( int a, int b, int c ) 62 { 63 int hash = 23; 64 hash = ( ( hash << 5 ) * 37 ) ^ a; 65 hash = ( ( hash << 5 ) * 37 ) ^ b; 66 hash = ( ( hash << 5 ) * 37 ) ^ c; 67 return hash; 68 } 69 70 public static int ShiftPrimeXOR( int a, int b, int c, int d ) 71 { 72 int hash = 23; 73 hash = ( ( hash << 5 ) * 37 ) ^ a; 74 hash = ( ( hash << 5 ) * 37 ) ^ b; 75 hash = ( ( hash << 5 ) * 37 ) ^ c; 76 hash = ( ( hash << 5 ) * 37 ) ^ d; 77 return hash; 78 } 79 80 public static int ShiftPrimeXOR( params int[] a ) 81 { 82 int hash = 23; 83 foreach ( int i in a ) 84 hash = ( ( hash << 5 ) * 37 ) ^ i; 85 return hash; 86 } 87 88 public static int ShiftPrimeAdd( int a, int b ) 89 { 90 int hash = 23; 91 hash = ( ( hash << 5 ) * 37 ) + a; 92 hash = ( ( hash << 5 ) * 37 ) + b; 93 return hash; 94 } 95 96 public static int ShiftPrimeAdd( int a, int b, int c ) 97 { 98 int hash = 23; 99 hash = ( ( hash << 5 ) * 37 ) + a; 100 hash = ( ( hash << 5 ) * 37 ) + b; 101 hash = ( ( hash << 5 ) * 37 ) + c; 102 return hash; 103 } 104 105 public static int ShiftPrimeAdd( int a, int b, int c, int d ) 106 { 107 int hash = 23; 108 hash = ( ( hash << 5 ) * 37 ) + a; 109 hash = ( ( hash << 5 ) * 37 ) + b; 110 hash = ( ( hash << 5 ) * 37 ) + c; 111 hash = ( ( hash << 5 ) * 37 ) + d; 112 return hash; 113 } 114 115 public static int ShiftPrimeAdd( params int[] a ) 116 { 117 int hash = 23; 118 foreach ( int i in a ) 119 hash = ( ( hash << 5 ) * 37 ) + i; 120 return hash; 121 } 122 } 123 } 124
