/*

 * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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 General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include "ByteBuffer.h"

#include <stdio.h>

ByteBuffer::ByteBuffer() {

    buffer.reserve(1024);

}

ByteBuffer::~ByteBuffer() {

}

LPBYTE ByteBuffer::getPtr() {

    return &buffer[0];

}

size_t ByteBuffer::getPos() {

    return buffer.size();

}

void ByteBuffer::AppendString(wstring str) {

    size_t len = (str.size() + 1) * sizeof (WCHAR);

    AppendBytes((BYTE*) str.c_str(), len);

}

void ByteBuffer::AppendWORD(WORD word) {

    AppendBytes((BYTE*) & word, sizeof (WORD));

}

void ByteBuffer::Align(size_t bytesNumber) {

    size_t pos = getPos();

    if (pos % bytesNumber) {

        DWORD dwNull = 0;

        size_t len = bytesNumber - pos % bytesNumber;

        AppendBytes((BYTE*) & dwNull, len);

    }

}

void ByteBuffer::AppendBytes(BYTE* ptr, size_t len) {

    buffer.insert(buffer.end(), ptr, ptr + len);

}

void ByteBuffer::ReplaceWORD(size_t offset, WORD word) {

    ReplaceBytes(offset, (BYTE*) & word, sizeof (WORD));

}

void ByteBuffer::ReplaceBytes(size_t offset, BYTE* ptr, size_t len) {

    for (size_t i = 0; i < len; i++) {

        buffer[offset + i] = *(ptr + i);

    }

}