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354 lines
7.4 KiB
354 lines
7.4 KiB
//
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// PtrBuffer.m
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// ANTLR
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//
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// Created by Alan Condit on 6/9/10.
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// [The "BSD licence"]
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// Copyright (c) 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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#define SUCCESS (0)
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#define FAILURE (-1)
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#import "PtrBuffer.h"
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#import "Tree.h"
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/*
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* Start of PtrBuffer
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*/
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@implementation PtrBuffer
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@synthesize BuffSize;
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@synthesize buffer;
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@synthesize ptrBuffer;
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@synthesize count;
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@synthesize ptr;
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+(PtrBuffer *)newPtrBuffer
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{
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return [[PtrBuffer alloc] init];
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}
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+(PtrBuffer *)newPtrBufferWithLen:(NSInteger)cnt
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{
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return [[PtrBuffer alloc] initWithLen:cnt];
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}
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-(id)init
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{
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NSUInteger idx;
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self = [super init];
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if ( self != nil ) {
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BuffSize = BUFFSIZE;
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ptr = 0;
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buffer = [[NSMutableData dataWithLength:(NSUInteger)BuffSize * sizeof(id)] retain];
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ptrBuffer = (id *) [buffer mutableBytes];
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for( idx = 0; idx < BuffSize; idx++ ) {
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ptrBuffer[idx] = nil;
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}
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count = 0;
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}
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return( self );
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}
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-(id)initWithLen:(NSUInteger)cnt
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{
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NSUInteger idx;
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self = [super init];
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if ( self != nil ) {
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BuffSize = cnt;
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ptr = 0;
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buffer = [[NSMutableData dataWithLength:(NSUInteger)BuffSize * sizeof(id)] retain];
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ptrBuffer = (id *)[buffer mutableBytes];
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for( idx = 0; idx < BuffSize; idx++ ) {
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ptrBuffer[idx] = nil;
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}
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count = 0;
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}
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return( self );
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}
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-(void)dealloc
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{
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#ifdef DEBUG_DEALLOC
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NSLog( @"called dealloc in PtrBuffer" );
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#endif
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LinkBase *tmp, *rtmp;
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NSInteger idx;
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if ( self.fNext != nil ) {
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for( idx = 0; idx < BuffSize; idx++ ) {
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tmp = ptrBuffer[idx];
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while ( tmp ) {
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rtmp = tmp;
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if ([tmp isKindOfClass:[LinkBase class]])
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tmp = (id)tmp.fNext;
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else
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tmp = nil;
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[rtmp release];
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}
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}
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}
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[buffer release];
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[super dealloc];
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}
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- (id) copyWithZone:(NSZone *)aZone
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{
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PtrBuffer *copy;
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copy = [[[self class] allocWithZone:aZone] init];
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if ( buffer )
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copy.buffer = [buffer copyWithZone:aZone];
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copy.ptrBuffer = ptrBuffer;
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copy.ptr = ptr;
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return copy;
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}
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- (void)clear
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{
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LinkBase *tmp, *rtmp;
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NSInteger idx;
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for( idx = 0; idx < BuffSize; idx++ ) {
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tmp = ptrBuffer[idx];
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while ( tmp ) {
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rtmp = tmp;
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if ([tmp isKindOfClass:[LinkBase class]])
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tmp = (id)tmp.fNext;
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else
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tmp = nil;
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[rtmp dealloc];
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}
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ptrBuffer[idx] = nil;
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}
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count = 0;
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}
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- (NSMutableData *)getBuffer
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{
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return( buffer );
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}
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- (void)setBuffer:(NSMutableData *)np
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{
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buffer = np;
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}
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- (NSUInteger)getCount
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{
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return( count );
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}
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- (void)setCount:(NSUInteger)aCount
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{
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count = aCount;
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}
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- (id *)getPtrBuffer
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{
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return( ptrBuffer );
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}
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- (void)setPtrBuffer:(id *)np
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{
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ptrBuffer = np;
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}
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- (NSUInteger)getPtr
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{
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return( ptr );
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}
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- (void)setPtr:(NSUInteger)aPtr
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{
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ptr = aPtr;
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}
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- (void) addObject:(id) v
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{
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[self ensureCapacity:ptr];
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if ( v ) [v retain];
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ptrBuffer[ptr++] = v;
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count++;
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}
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- (void) push:(id) v
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{
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if ( ptr >= BuffSize - 1 ) {
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[self ensureCapacity:ptr];
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}
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if ( v ) [v retain];
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ptrBuffer[ptr++] = v;
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count++;
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}
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- (id) pop
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{
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id v = nil;
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if ( ptr > 0 ) {
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v = ptrBuffer[--ptr];
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ptrBuffer[ptr] = nil;
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}
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count--;
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if ( v ) [v release];
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return v;
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}
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- (id) peek
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{
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id v = nil;
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if ( ptr > 0 ) {
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v = ptrBuffer[ptr-1];
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}
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return v;
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}
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- (NSUInteger)count
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{
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#ifdef DONTUSENOMO
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int cnt = 0;
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for (NSInteger i = 0; i < BuffSize; i++ ) {
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if ( ptrBuffer[i] != nil ) {
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cnt++;
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}
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}
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if ( cnt != count ) count = cnt;
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#endif
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return count;
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}
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- (NSUInteger)length
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{
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return BuffSize;
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}
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- (NSUInteger)size
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{
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NSUInteger aSize = 0;
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for (int i = 0; i < BuffSize; i++ ) {
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if (ptrBuffer[i] != nil) {
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aSize += sizeof(id);
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}
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}
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return aSize;
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}
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- (void) insertObject:(id)aRule atIndex:(NSUInteger)idx
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{
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if ( idx >= BuffSize ) {
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[self ensureCapacity:idx];
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}
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if ( aRule != ptrBuffer[idx] ) {
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if ( ptrBuffer[idx] ) [ptrBuffer[idx] release];
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if ( aRule ) [aRule retain];
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}
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ptrBuffer[idx] = aRule;
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count++;
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}
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- (id)objectAtIndex:(NSUInteger)idx
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{
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if ( idx < BuffSize ) {
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return ptrBuffer[idx];
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}
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return nil;
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}
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- (void)addObjectsFromArray:(PtrBuffer *)anArray
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{
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NSInteger cnt, i;
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cnt = [anArray count];
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for( i = 0; i < cnt; i++) {
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id tmp = [anArray objectAtIndex:i];
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if ( tmp ) [tmp retain];
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[self insertObject:tmp atIndex:i];
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}
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count += cnt;
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return;
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}
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- (void)removeAllObjects
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{
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int i;
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for ( i = 0; i < BuffSize; i++ ) {
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if ( ptrBuffer[i] ) [ptrBuffer[i] release];
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ptrBuffer[i] = nil;
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}
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count = 0;
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ptr = 0;
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}
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- (void)removeObjectAtIndex:(NSInteger)idx
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{
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int i;
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if ( idx >= 0 && idx < count ) {
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if ( ptrBuffer[idx] ) [ptrBuffer[idx] release];
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for ( i = idx; i < count-1; i++ ) {
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ptrBuffer[i] = ptrBuffer[i+1];
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}
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ptrBuffer[i] = nil;
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count--;
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}
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}
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- (void) ensureCapacity:(NSUInteger) anIndex
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{
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if ((anIndex * sizeof(id)) >= [buffer length])
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{
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NSInteger newSize = ([buffer length] / sizeof(id)) * 2;
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if (anIndex > newSize) {
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newSize = anIndex + 1;
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}
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BuffSize = newSize;
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[buffer setLength:(BuffSize * sizeof(id))];
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ptrBuffer = [buffer mutableBytes];
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}
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}
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- (NSString *) description
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{
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NSMutableString *str;
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NSInteger idx, cnt;
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cnt = [self count];
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str = [NSMutableString stringWithCapacity:30];
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[str appendString:@"["];
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for (idx = 0; idx < cnt; idx++ ) {
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[str appendString:[[self objectAtIndex:idx] description]];
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}
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[str appendString:@"]"];
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return str;
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}
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- (NSString *) toString
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{
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return [self description];
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}
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@end
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