1 /*
   2 * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
   3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4 *
   5 * This code is free software; you can redistribute it and/or modify it
   6 * under the terms of the GNU General Public License version 2 only, as
   7 * published by the Free Software Foundation.  Oracle designates this
   8 * particular file as subject to the "Classpath" exception as provided
   9 * by Oracle in the LICENSE file that accompanied this code.
  10 *
  11 * This code is distributed in the hope that it will be useful, but WITHOUT
  12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 * version 2 for more details (a copy is included in the LICENSE file that
  15 * accompanied this code).
  16 *
  17 * You should have received a copy of the GNU General Public License version
  18 * 2 along with this work; if not, write to the Free Software Foundation,
  19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20 *
  21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22 * or visit www.oracle.com if you need additional information or have any
  23 * questions.
  24 */
  25 
  26 #include "ByteBuffer.h"
  27 
  28 #include <stdio.h>
  29 
  30 ByteBuffer::ByteBuffer()
  31 {
  32     buffer.reserve(1024);
  33 }
  34 
  35 ByteBuffer::~ByteBuffer()
  36 {
  37 }
  38 
  39 LPBYTE ByteBuffer::getPtr() {
  40     return &buffer[0];
  41 }
  42 
  43 size_t ByteBuffer::getPos() {
  44     return buffer.size();
  45 }
  46 
  47 void ByteBuffer::AppendString(wstring str) {
  48     size_t len = (str.size() + 1) * sizeof WCHAR;
  49     AppendBytes((BYTE*)str.c_str(), len);
  50 }
  51 
  52 void ByteBuffer::AppendWORD(WORD word) {
  53     AppendBytes((BYTE*)&word, sizeof WORD);
  54 }
  55 
  56 void ByteBuffer::Align(size_t bytesNumber) {
  57     size_t pos = getPos();
  58     if (pos % bytesNumber) {
  59         DWORD dwNull = 0;
  60         size_t len = bytesNumber - pos % bytesNumber;
  61         AppendBytes((BYTE*)&dwNull, len);
  62     }
  63 }
  64 
  65 void ByteBuffer::AppendBytes(BYTE* ptr, size_t len) {
  66     buffer.insert(buffer.end(), ptr, ptr + len);
  67 }
  68 
  69 void ByteBuffer::ReplaceWORD(size_t offset, WORD word) {
  70     ReplaceBytes(offset, (BYTE*)&word, sizeof WORD);
  71 }
  72 
  73 void ByteBuffer::ReplaceBytes(size_t offset, BYTE* ptr, size_t len) {
  74     for (size_t i = 0; i < len; i++) {
  75         buffer[offset + i] = *(ptr + i);
  76     }
  77 }