1 // [The "BSD licence"] 2 // Copyright (c) 2006-2007 Kay Roepke 2010 Alan Condit 3 // All rights reserved. 4 // 5 // Redistribution and use in source and binary forms, with or without 6 // modification, are permitted provided that the following conditions 7 // are met: 8 // 1. Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // 2. Redistributions in binary form must reproduce the above copyright 11 // notice, this list of conditions and the following disclaimer in the 12 // documentation and/or other materials provided with the distribution. 13 // 3. The name of the author may not be used to endorse or promote products 14 // derived from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 // IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 // NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 27 28 #import <Foundation/Foundation.h> 29 #import <CoreFoundation/CoreFoundation.h> 30 #import "Token.h" 31 #import "AMutableArray.h" 32 33 #define BITS (sizeof(NSUInteger) * 8) 34 #define LOG_BITS ((sizeof(NSUInteger)==8)?6:5) 35 36 // A simple wrapper around CoreFoundation bit vectors to shield the rest of the implementation 37 // from the specifics of the BitVector initialization and query functions. 38 // This is fast, so there is no need to reinvent the wheel just yet. 39 40 @interface ANTLRBitSet : NSObject < NSMutableCopying > { 41 __strong CFMutableBitVectorRef bitVector; 42 } 43 44 #pragma mark Class Methods 45 46 + (ANTLRBitSet *) newBitSet; 47 + (ANTLRBitSet *) newBitSetWithType:(TokenType)type; 48 /** Construct a ANTLRBitSet given the size 49 * @param nbits The size of the ANTLRBitSet in bits 50 */ 51 + (ANTLRBitSet *) newBitSetWithNBits:(NSUInteger)nbits; 52 + (ANTLRBitSet *) newBitSetWithArray:(AMutableArray *)types; 53 + (ANTLRBitSet *) newBitSetWithBits:(const unsigned long long *)theBits Count:(NSUInteger)longCount; 54 55 + (ANTLRBitSet *) of:(NSUInteger)el; 56 + (ANTLRBitSet *) of:(NSUInteger)a And2:(NSUInteger)b; 57 + (ANTLRBitSet *) of:(NSUInteger)a And2:(NSUInteger)b And3:(NSUInteger)c; 58 + (ANTLRBitSet *) of:(NSUInteger)a And2:(NSUInteger)b And3:(NSUInteger)c And4:(NSUInteger)d; 59 60 #pragma mark Initializer 61 62 - (ANTLRBitSet *) init; 63 - (ANTLRBitSet *) initWithType:(TokenType)type; 64 - (ANTLRBitSet *) initWithNBits:(NSUInteger)nbits; 65 - (ANTLRBitSet *) initWithBitVector:(CFMutableBitVectorRef)theBitVector; 66 - (ANTLRBitSet *) initWithBits:(const unsigned long long const*)theBits Count:(NSUInteger)theCount; 67 - (ANTLRBitSet *) initWithArrayOfBits:(NSArray *)theArray; 68 69 #pragma mark Operations 70 - (ANTLRBitSet *) or:(ANTLRBitSet *) aBitSet; 71 - (void) orInPlace:(ANTLRBitSet *) aBitSet; 72 - (void) add:(NSUInteger) bit; 73 - (void) remove:(NSUInteger) bit; 74 - (void) setAllBits:(BOOL) aState; 75 76 - (NSInteger) numBits; 77 - (NSUInteger) size; 78 - (void) setSize:(NSUInteger) noOfWords; 79 80 #pragma mark Informational 81 - (unsigned long long) bitMask:(NSUInteger) bitNumber; 82 - (BOOL) member:(NSUInteger)bitNumber; 83 - (BOOL) isNil; 84 - (NSString *) description; 85 - (NSString *) toString; 86 87 #pragma mark NSCopying support 88 89 - (id) mutableCopyWithZone:(NSZone *) theZone; 90 91 92 //private 93 - (CFMutableBitVectorRef) _bitVector; 94 @property (getter=_bitVector) CFMutableBitVectorRef bitVector; 95 @end 96