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//
// ANTLRFastQueue.m
// ANTLR
//
// Created by Ian Michell on 26/04/2010.
// [The "BSD licence"]
// Copyright (c) 2010 Ian Michell 2010 Alan Condit
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. The name of the author may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#import "ANTLRFastQueue.h"
#import "ANTLRError.h"
#import "ANTLRRuntimeException.h"
@implementation ANTLRFastQueue
//@synthesize pool;
@synthesize data;
@synthesize p;
@synthesize range;
+ (id) newANTLRFastQueue
{
return [[ANTLRFastQueue alloc] init];
}
- (id) init
{
self = [super init];
if ( self != nil ) {
data = [[AMutableArray arrayWithCapacity:100] retain];
p = 0;
range = -1;
}
return self;
}
- (void) dealloc
{
#ifdef DEBUG_DEALLOC
NSLog( @"called dealloc in ANTLRFastQueue" );
#endif
if ( data ) [data release];
[super dealloc];
}
- (id) copyWithZone:(NSZone *)aZone
{
ANTLRFastQueue *copy;
copy = [[[self class] allocWithZone:aZone] init];
copy.data = [data copyWithZone:nil];
copy.p = p;
copy.range = range;
return copy;
}
// FIXME: Java code has this, it doesn't seem like it needs to be there... Then again a lot of the code in the java runtime is not great...
- (void) reset
{
[self clear];
}
- (void) clear
{
p = 0;
if ( [data count] )
[data removeAllObjects];
}
- (id) remove
{
id obj = [self objectAtIndex:0];
p++;
// check to see if we have hit the end of the buffer
if ( p == [data count] ) {
// if we have, then we need to clear it out
[self clear];
}
return obj;
}
- (void) addObject:(id) obj
{
[data addObject:obj];
}
- (NSUInteger) count
{
return [data count];
}
- (NSUInteger) size
{
return [data count] - p;
}
- (NSUInteger) range
{
return range;
}
- (id) head
{
return [self objectAtIndex:0];
}
- (id) objectAtIndex:(NSUInteger) i
{
NSUInteger absIndex;
absIndex = p + i;
if ( absIndex >= [data count] ) {
@throw [ANTLRNoSuchElementException newException:[NSString stringWithFormat:@"queue index %d > last index %d", absIndex, [data count]-1]];
}
if ( absIndex < 0 ) {
@throw [ANTLRNoSuchElementException newException:[NSString stringWithFormat:@"queue index %d < 0", absIndex]];
}
if ( absIndex > range ) range = absIndex;
return [data objectAtIndex:absIndex];
}
- (NSString *) toString
{
return [self description];
}
- (NSString *) description
{
NSMutableString *buf = [NSMutableString stringWithCapacity:30];
NSInteger n = [self size];
for (NSInteger i = 0; i < n; i++) {
[buf appendString:[[self objectAtIndex:i] description]];
if ((i + 1) < n) {
[buf appendString:@" "];
}
}
return buf;
}
#ifdef DONTUSENOMO
- (NSAutoreleasePool *)getPool
{
return pool;
}
- (void)setPool:(NSAutoreleasePool *)aPool
{
pool = aPool;
}
#endif
@end
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