1/*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "ArgumentEncoder.h"
28
29#include <algorithm>
30#include <stdio.h>
31
32namespace CoreIPC {
33
34PassOwnPtr<ArgumentEncoder> ArgumentEncoder::create(uint64_t destinationID)
35{
36    return adoptPtr(new ArgumentEncoder(destinationID));
37}
38
39ArgumentEncoder::ArgumentEncoder(uint64_t destinationID)
40    : m_buffer(0)
41    , m_bufferPointer(0)
42    , m_bufferSize(0)
43    , m_bufferCapacity(0)
44{
45    // Encode the destination ID.
46    encodeUInt64(destinationID);
47}
48
49ArgumentEncoder::~ArgumentEncoder()
50{
51    if (m_buffer)
52        fastFree(m_buffer);
53#if !PLATFORM(QT) && !PLATFORM(GTK)
54    // FIXME: We need to dispose of the attachments in cases of failure.
55#else
56    for (int i = 0; i < m_attachments.size(); ++i)
57        m_attachments[i].dispose();
58#endif
59}
60
61static inline size_t roundUpToAlignment(size_t value, unsigned alignment)
62{
63    return ((value + alignment - 1) / alignment) * alignment;
64}
65
66uint8_t* ArgumentEncoder::grow(unsigned alignment, size_t size)
67{
68    size_t alignedSize = roundUpToAlignment(m_bufferSize, alignment);
69
70    if (alignedSize + size > m_bufferCapacity) {
71        size_t newCapacity = std::max(alignedSize + size, std::max(static_cast<size_t>(32), m_bufferCapacity + m_bufferCapacity / 4 + 1));
72        if (!m_buffer)
73            m_buffer = static_cast<uint8_t*>(fastMalloc(newCapacity));
74        else
75            m_buffer = static_cast<uint8_t*>(fastRealloc(m_buffer, newCapacity));
76
77        // FIXME: What should we do if allocating memory fails?
78
79        m_bufferCapacity = newCapacity;
80    }
81
82    m_bufferSize = alignedSize + size;
83    m_bufferPointer = m_buffer + alignedSize + size;
84
85    return m_buffer + alignedSize;
86}
87
88void ArgumentEncoder::encodeBytes(const uint8_t* bytes, size_t size)
89{
90    // Encode the size.
91    encodeUInt64(static_cast<uint64_t>(size));
92
93    uint8_t* buffer = grow(1, size);
94
95    memcpy(buffer, bytes, size);
96}
97
98void ArgumentEncoder::encodeBool(bool n)
99{
100    uint8_t* buffer = grow(sizeof(n), sizeof(n));
101
102    *reinterpret_cast<bool*>(buffer) = n;
103}
104
105void ArgumentEncoder::encodeUInt32(uint32_t n)
106{
107    uint8_t* buffer = grow(sizeof(n), sizeof(n));
108
109    *reinterpret_cast<uint32_t*>(buffer) = n;
110}
111
112void ArgumentEncoder::encodeUInt64(uint64_t n)
113{
114    uint8_t* buffer = grow(sizeof(n), sizeof(n));
115
116    *reinterpret_cast<uint64_t*>(buffer) = n;
117}
118
119void ArgumentEncoder::encodeInt32(int32_t n)
120{
121    uint8_t* buffer = grow(sizeof(n), sizeof(n));
122
123    *reinterpret_cast<int32_t*>(buffer) = n;
124}
125
126void ArgumentEncoder::encodeInt64(int64_t n)
127{
128    uint8_t* buffer = grow(sizeof(n), sizeof(n));
129
130    *reinterpret_cast<int64_t*>(buffer) = n;
131}
132
133void ArgumentEncoder::encodeFloat(float n)
134{
135    uint8_t* buffer = grow(sizeof(n), sizeof(n));
136
137    *reinterpret_cast<float*>(buffer) = n;
138}
139
140void ArgumentEncoder::encodeDouble(double n)
141{
142    uint8_t* buffer = grow(sizeof(n), sizeof(n));
143
144    *reinterpret_cast<double*>(buffer) = n;
145}
146
147void ArgumentEncoder::addAttachment(const Attachment& attachment)
148{
149    m_attachments.append(attachment);
150}
151
152Vector<Attachment> ArgumentEncoder::releaseAttachments()
153{
154    Vector<Attachment> newList;
155    newList.swap(m_attachments);
156    return newList;
157}
158
159#ifndef NDEBUG
160void ArgumentEncoder::debug()
161{
162    printf("ArgumentEncoder::debug()\n");
163    printf("Number of Attachments: %d\n", (int)m_attachments.size());
164    printf("Size of buffer: %d\n", (int)m_bufferSize);
165}
166#endif
167
168} // namespace CoreIPC
169