1 /** 2 * \file 3 * Defines the basic structures of an ANTLR3 bitset. this is a C version of the 4 * cut down Bitset class provided with the java version of antlr 3. 5 * 6 * 7 */ 8 #ifndef _ANTLR3_BITSET_H 9 #define _ANTLR3_BITSET_H 10 11 // [The "BSD licence"] 12 // Copyright (c) 2005-2009 Jim Idle, Temporal Wave LLC 13 // http://www.temporal-wave.com 14 // http://www.linkedin.com/in/jimidle 15 // 16 // All rights reserved. 17 // 18 // Redistribution and use in source and binary forms, with or without 19 // modification, are permitted provided that the following conditions 20 // are met: 21 // 1. Redistributions of source code must retain the above copyright 22 // notice, this list of conditions and the following disclaimer. 23 // 2. Redistributions in binary form must reproduce the above copyright 24 // notice, this list of conditions and the following disclaimer in the 25 // documentation and/or other materials provided with the distribution. 26 // 3. The name of the author may not be used to endorse or promote products 27 // derived from this software without specific prior written permission. 28 // 29 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 30 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 31 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 32 // IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 33 // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 34 // NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 38 // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 40 #include <antlr3defs.h> 41 #include <antlr3collections.h> 42 43 /** How many bits in the elements 44 */ 45 #define ANTLR3_BITSET_BITS 64 46 47 /** How many bits in a nible of bits 48 */ 49 #define ANTLR3_BITSET_NIBBLE 4 50 51 /** log2 of ANTLR3_BITSET_BITS 2^ANTLR3_BITSET_LOG_BITS = ANTLR3_BITSET_BITS 52 */ 53 #define ANTLR3_BITSET_LOG_BITS 6 54 55 /** We will often need to do a mod operator (i mod nbits). 56 * For powers of two, this mod operation is the 57 * same as: 58 * - (i & (nbits-1)). 59 * 60 * Since mod is relatively slow, we use an easily 61 * precomputed mod mask to do the mod instead. 62 */ 63 #define ANTLR3_BITSET_MOD_MASK ANTLR3_BITSET_BITS - 1 64 65 #ifdef __cplusplus 66 extern "C" { 67 #endif 68 69 typedef struct ANTLR3_BITSET_LIST_struct 70 { 71 /// Pointer to the allocated array of bits for this bit set, which 72 /// is an array of 64 bit elements (of the architecture). If we find a 73 /// machine/C compiler that does not know anything about 64 bit values 74 /// then it should be easy enough to produce a 32 bit (or less) version 75 /// of the bitset code. Note that the pointer here may be static if laid down 76 /// by the code generation, and it must be copied if it is to be manipulated 77 /// to perform followset calculations. 78 /// 79 pANTLR3_BITWORD bits; 80 81 /// Length of the current bit set in ANTLR3_UINT64 units. 82 /// 83 ANTLR3_UINT32 length; 84 } 85 ANTLR3_BITSET_LIST; 86 87 typedef struct ANTLR3_BITSET_struct 88 { 89 /// The actual bits themselves 90 /// 91 ANTLR3_BITSET_LIST blist; 92 93 pANTLR3_BITSET (*clone) (struct ANTLR3_BITSET_struct * inSet); 94 pANTLR3_BITSET (*bor) (struct ANTLR3_BITSET_struct * bitset1, struct ANTLR3_BITSET_struct * bitset2); 95 void (*borInPlace) (struct ANTLR3_BITSET_struct * bitset, struct ANTLR3_BITSET_struct * bitset2); 96 ANTLR3_UINT32 (*size) (struct ANTLR3_BITSET_struct * bitset); 97 void (*add) (struct ANTLR3_BITSET_struct * bitset, ANTLR3_INT32 bit); 98 void (*grow) (struct ANTLR3_BITSET_struct * bitset, ANTLR3_INT32 newSize); 99 ANTLR3_BOOLEAN (*equals) (struct ANTLR3_BITSET_struct * bitset1, struct ANTLR3_BITSET_struct * bitset2); 100 ANTLR3_BOOLEAN (*isMember) (struct ANTLR3_BITSET_struct * bitset, ANTLR3_UINT32 bit); 101 ANTLR3_UINT32 (*numBits) (struct ANTLR3_BITSET_struct * bitset); 102 void (*remove) (struct ANTLR3_BITSET_struct * bitset, ANTLR3_UINT32 bit); 103 ANTLR3_BOOLEAN (*isNilNode) (struct ANTLR3_BITSET_struct * bitset); 104 pANTLR3_INT32 (*toIntList) (struct ANTLR3_BITSET_struct * bitset); 105 106 void (*free) (struct ANTLR3_BITSET_struct * bitset); 107 108 109 } 110 ANTLR3_BITSET; 111 112 #ifdef __cplusplus 113 } 114 #endif 115 116 117 118 #endif 119 120
