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 <Cocoa/Cocoa.h> 29 #import <CoreFoundation/CoreFoundation.h> 30 #import "ANTLRToken.h" 31 32 #define BITS (sizeof(NSUInteger) * 8) 33 #define LOG_BITS ((sizeof(NSUInteger)==8)?6:5) 34 35 // A simple wrapper around CoreFoundation bit vectors to shield the rest of the implementation 36 // from the specifics of the BitVector initialization and query functions. 37 // This is fast, so there is no need to reinvent the wheel just yet. 38 39 @interface ANTLRBitSet : NSObject < NSMutableCopying > { 40 CFMutableBitVectorRef bitVector; 41 } 42 43 #pragma mark Class Methods 44 45 + (ANTLRBitSet *) newANTLRBitSet; 46 + (ANTLRBitSet *) newANTLRBitSetWithType:(ANTLRTokenType)type; 47 /** Construct a ANTLRBitSet given the size 48 * @param nbits The size of the ANTLRBitSet in bits 49 */ 50 + (ANTLRBitSet *) newANTLRBitSetWithNBits:(NSUInteger)nbits; 51 + (ANTLRBitSet *) newANTLRBitSetWithArray:(NSMutableArray *)types; 52 + (ANTLRBitSet *) newANTLRBitSetWithBits:(const unsigned long long *)theBits Count:(NSUInteger)longCount; 53 54 + (ANTLRBitSet *) of:(NSUInteger)el; 55 + (ANTLRBitSet *) of:(NSUInteger)a And2:(NSUInteger)b; 56 + (ANTLRBitSet *) of:(NSUInteger)a And2:(NSUInteger)b And3:(NSUInteger)c; 57 + (ANTLRBitSet *) of:(NSUInteger)a And2:(NSUInteger)b And3:(NSUInteger)c And4:(NSUInteger)d; 58 59 #pragma mark Initializer 60 61 - (ANTLRBitSet *) init; 62 - (ANTLRBitSet *) initWithType:(ANTLRTokenType)type; 63 - (ANTLRBitSet *) initWithNBits:(NSUInteger)nbits; 64 - (ANTLRBitSet *) initWithBitVector:(CFMutableBitVectorRef)theBitVector; 65 - (ANTLRBitSet *) initWithBits:(const unsigned long long const*)theBits Count:(NSUInteger)theCount; 66 - (ANTLRBitSet *) initWithArrayOfBits:(NSArray *)theArray; 67 68 #pragma mark Operations 69 - (ANTLRBitSet *) or:(ANTLRBitSet *) aBitSet; 70 - (void) orInPlace:(ANTLRBitSet *) aBitSet; 71 - (void) add:(NSUInteger) bit; 72 - (void) remove:(NSUInteger) bit; 73 - (void) setAllBits:(BOOL) aState; 74 75 - (NSInteger) numBits; 76 - (NSUInteger) size; 77 - (void) setSize:(NSUInteger) noOfWords; 78 79 #pragma mark Informational 80 - (unsigned long long) bitMask:(NSUInteger) bitNumber; 81 - (BOOL) member:(NSUInteger)bitNumber; 82 - (BOOL) isNil; 83 - (NSString *) toString; 84 - (NSString *) description; 85 86 #pragma mark NSCopying support 87 88 - (id) mutableCopyWithZone:(NSZone *) theZone; 89 90 91 //private 92 - (CFMutableBitVectorRef) _bitVector; 93 @end 94