Array.cc

Go to the documentation of this file.

/*
 * Array.cc
 *
 * Smalltalk like class library for C++
 * Fixed size collection, index-accessable.
 *
 * Copyright (c) 2003 Milan Cermak
 */
/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <stdio.h>

#include <stlib/Array.h>
#include <stlib/CollectionIterator.h>
#include <stlib/String.h>
#include <stlib/SOOBoundsError.h>

Array::Array(int size)
{
    content = NULL;
    tally = size;
    if (tally > 0) {
        content = (Object **) GC_malloc(sizeof(Object *) * tally);
        for (int i = 0; i < tally; i++) {
            content[i] = nil;
        }
    }
}

Array::~Array(void)
{
    if (content != NULL) {
        GC_free(content);
    }
}

/* Copying protocol */
Array::Array(const Array &origin)
  : SequenceableCollection(origin)
{
    content = NULL;
    tally = origin.tally;
    if (tally > 0) {
        content = (Object **) GC_malloc(sizeof(Object *) * tally);
        for (int i = 0; i < tally; i++) {
            content[i] = origin.content[i];
        }
    }
}

/* Class-accessing protocol */
String *Array::className(void) const
{
    return new String("Array");
}

/* Class-instance creation protocol */
Array *Array::with(Object *object)
{
    Array *newArray = new Array(1);
    newArray->put(0, object);
    return newArray;
}

Array *Array::with(Object *obj1, Object *obj2)
{
    Array *newArray = new Array(2);
    newArray->put(0, obj1);
    newArray->put(1, obj2);
    return newArray;
}

Array *Array::with(Object *obj1, Object *obj2, Object *obj3)
{
    Array *newArray = new Array(3);
    newArray->put(0, obj1);
    newArray->put(1, obj2);
    newArray->put(2, obj3);
    return newArray;
}

Array *Array::with(Object *obj1, Object *obj2, Object *obj3, Object *obj4)
{
    Array *newArray = new Array(4);
    newArray->put(0, obj1);
    newArray->put(1, obj2);
    newArray->put(2, obj3);
    newArray->put(3, obj4);
    return newArray;
}

Array *Array::withAll(Collection *coll)
{
    Array *newArray = new Array(coll->size());
    int index = 0;
    for (Iterator *i = coll->iterator(); !i->finished(); i->next()) {
        newArray->put(index++, i->value());
    }
    return newArray;
}

/* Accessing protocol */
Object *Array::any(void)
{
    long idx = 0;
    do {
        if (at(idx) != nil) return at(idx);
        idx++;
    } while (idx < tally);
    return nil;
}

Object *Array::at(int index) const
{
    if (index < 0 || index >= tally) {
        SubscriptOutOfBoundsError *ex;
        ex = new SubscriptOutOfBoundsError(__PRETTY_FUNCTION__, index);
        ex->raiseFrom(this);
    }
    return content[index];
}

void Array::put(int index, Object *obj)
{
    if (index < 0 || index >= tally) {
        SubscriptOutOfBoundsError *ex;
        ex = new SubscriptOutOfBoundsError(__PRETTY_FUNCTION__, index);
        ex->raiseFrom(this);
    }
    content[index] = obj;
}

long Array::size(void) const
{
    return tally;
}

/* Adding protocol */
void Array::add(Object *)
{
    shouldNotImplement(new String(__PRETTY_FUNCTION__));
}

void Array::changeSize(long newSize)
{
    Object **oldContent = content;
    long oldSize = tally;
    long i;

    content = (Object **) GC_malloc(sizeof(Object *) * newSize);
    tally = newSize;

    /* Copy old content or the part that fits */
    for (i = 0; i < oldSize && i < tally; i++) {
        content[i] = oldContent[i];
    }
    /* Fill the rest with nils */
    for (; i < tally; i++) {
        content[i] = nil;
    }

    GC_free(oldContent);
}

/* Converting protocol */
Array *Array::asArray(void)
{
    return this;
}

/* Copying protocol */
Object *Array::copy(void)
{
    return new Array(*this);
}

Object *Array::copyEmpty(long size)
{
    return new Array(size);
}

/* protected methods */
/* Enumeration protocol */
Object *Array::privNextForIterator(CollectionIterator *iter) const
{
    return at(iter->position());
}

---