TwoByteString.cc

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/*
 * TwoByteString.cc
 *
 * Smalltalk like class library for C++
 * String implementor using c-array of words.
 *
 * Copyright (c) 2004 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 <stlib/TwoByteString.h>
#include <stlib/Character.h>
#include <stlib/String.h>

#include <string.h>

using namespace Core;

TwoByteString::TwoByteString(int size)
{
    content = (unsigned short *) GC_malloc(size * sizeof(unsigned short));
    tally = size;
}

TwoByteString::~TwoByteString(void)
{
    GC_free(content);
}

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

/* Accessing protocol */
Character *TwoByteString::at(int index) const
{
    return Character::value(content[index]);
}

void TwoByteString::put(int index, Character *object)
{
    content[index] = object->asInteger();
}

int TwoByteString::byteSize(void)
{
    return 2;
}

void TwoByteString::putRawValue(int index, unsigned short value)
{
    content[index] = value;
}

/* Comparing protocol */
bool TwoByteString::isEqual(StringImpl *string)
{
    return string->isEqualToShorts(this->content);
}

bool TwoByteString::isEqualToBytes(unsigned char *string)
{
    for (int i = 0; i < tally; i++) {
        if (this->content[i] != string[i])
            return false;
    }
    return true;
}

bool TwoByteString::isEqualToShorts(unsigned short *string)
{
    for (int i = 0; i < tally; i++) {
        if (this->content[i] != string[i])
            return false;
    }
    return true;
}

/* Adding protocol */
void TwoByteString::changeSize(long newSize)
{
    unsigned short *oldContent = content;

    content = (unsigned short *) GC_malloc(newSize * sizeof(unsigned short));
    bzero(content, newSize);
    memcpy(content, oldContent, size() * sizeof(unsigned short));
    tally = newSize;
}

/* Converting protocol */
TwoByteString *TwoByteString::asTwoByteString(void)
{
    return this;
}

/* Testing protocol */
bool TwoByteString::isTwoByteString(void) const
{
    return true;
}

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