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96 lines
3.7 KiB
96 lines
3.7 KiB
// [The "BSD licence"]
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// Copyright (c) 2006-2007 Kay Roepke 2010 Alan Condit
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// 3. The name of the author may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#import <Foundation/Foundation.h>
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#import <CoreFoundation/CoreFoundation.h>
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#import "Token.h"
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#import "AMutableArray.h"
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#define BITS (sizeof(NSUInteger) * 8)
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#define LOG_BITS ((sizeof(NSUInteger)==8)?6:5)
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// A simple wrapper around CoreFoundation bit vectors to shield the rest of the implementation
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// from the specifics of the BitVector initialization and query functions.
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// This is fast, so there is no need to reinvent the wheel just yet.
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@interface ANTLRBitSet : NSObject < NSMutableCopying > {
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__strong CFMutableBitVectorRef bitVector;
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}
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#pragma mark Class Methods
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+ (ANTLRBitSet *) newBitSet;
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+ (ANTLRBitSet *) newBitSetWithType:(TokenType)type;
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/** Construct a ANTLRBitSet given the size
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* @param nbits The size of the ANTLRBitSet in bits
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*/
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+ (ANTLRBitSet *) newBitSetWithNBits:(NSUInteger)nbits;
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+ (ANTLRBitSet *) newBitSetWithArray:(AMutableArray *)types;
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+ (ANTLRBitSet *) newBitSetWithBits:(const unsigned long long *)theBits Count:(NSUInteger)longCount;
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+ (ANTLRBitSet *) of:(NSUInteger)el;
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+ (ANTLRBitSet *) of:(NSUInteger)a And2:(NSUInteger)b;
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+ (ANTLRBitSet *) of:(NSUInteger)a And2:(NSUInteger)b And3:(NSUInteger)c;
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+ (ANTLRBitSet *) of:(NSUInteger)a And2:(NSUInteger)b And3:(NSUInteger)c And4:(NSUInteger)d;
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#pragma mark Initializer
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- (ANTLRBitSet *) init;
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- (ANTLRBitSet *) initWithType:(TokenType)type;
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- (ANTLRBitSet *) initWithNBits:(NSUInteger)nbits;
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- (ANTLRBitSet *) initWithBitVector:(CFMutableBitVectorRef)theBitVector;
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- (ANTLRBitSet *) initWithBits:(const unsigned long long const*)theBits Count:(NSUInteger)theCount;
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- (ANTLRBitSet *) initWithArrayOfBits:(NSArray *)theArray;
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#pragma mark Operations
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- (ANTLRBitSet *) or:(ANTLRBitSet *) aBitSet;
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- (void) orInPlace:(ANTLRBitSet *) aBitSet;
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- (void) add:(NSUInteger) bit;
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- (void) remove:(NSUInteger) bit;
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- (void) setAllBits:(BOOL) aState;
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- (NSInteger) numBits;
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- (NSUInteger) size;
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- (void) setSize:(NSUInteger) noOfWords;
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#pragma mark Informational
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- (unsigned long long) bitMask:(NSUInteger) bitNumber;
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- (BOOL) member:(NSUInteger)bitNumber;
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- (BOOL) isNil;
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- (NSString *) description;
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- (NSString *) toString;
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#pragma mark NSCopying support
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- (id) mutableCopyWithZone:(NSZone *) theZone;
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//private
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- (CFMutableBitVectorRef) _bitVector;
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@property (getter=_bitVector) CFMutableBitVectorRef bitVector;
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@end
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