ladybird/AK/BufferStream.h
Andreas Kling 88b9fcb976 AK: Use size_t for ByteBuffer sizes
This matches what we already do for string types.
2020-02-20 13:20:34 +01:00

359 lines
9.7 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/ByteBuffer.h>
#include <AK/String.h>
namespace AK {
class BufferStream {
public:
explicit BufferStream(ByteBuffer& buffer)
: m_buffer(buffer)
{
}
~BufferStream()
{
ASSERT(!m_read_failure);
}
BufferStream& operator<<(i8 value)
{
m_buffer[m_offset++] = value;
return *this;
}
BufferStream& operator>>(i8& value)
{
if (m_offset + sizeof(value) > unsigned(m_buffer.size())) {
m_read_failure = true;
return *this;
}
value = m_buffer[m_offset++];
return *this;
}
BufferStream& operator<<(u8 value)
{
m_buffer[m_offset++] = value;
return *this;
}
BufferStream& operator>>(u8& value)
{
if (m_offset + sizeof(value) > unsigned(m_buffer.size())) {
m_read_failure = true;
return *this;
}
value = m_buffer[m_offset++];
return *this;
}
BufferStream& operator<<(bool value)
{
m_buffer[m_offset++] = value;
return *this;
}
BufferStream& operator>>(bool& value)
{
if (m_offset + sizeof(value) > unsigned(m_buffer.size())) {
m_read_failure = true;
return *this;
}
value = m_buffer[m_offset++];
return *this;
}
BufferStream& operator<<(float value)
{
union bits {
float as_float;
u32 as_u32;
} u;
u.as_float = value;
return *this << u.as_u32;
}
BufferStream& operator>>(float& value)
{
union bits {
float as_float;
u32 as_u32;
} u;
*this >> u.as_u32;
if (m_read_failure)
return *this;
value = u.as_float;
return *this;
}
BufferStream& operator<<(char value)
{
m_buffer[m_offset++] = (u8)value;
return *this;
}
BufferStream& operator>>(char& value)
{
if (m_offset + sizeof(value) > unsigned(m_buffer.size())) {
m_read_failure = true;
return *this;
}
value = (u8)m_buffer[m_offset++];
return *this;
}
BufferStream& operator<<(u16 value)
{
m_buffer[m_offset++] = value;
m_buffer[m_offset++] = (u8)(value >> 8);
return *this;
}
BufferStream& operator>>(u16& value)
{
if (m_offset + sizeof(value) > unsigned(m_buffer.size())) {
m_read_failure = true;
return *this;
}
value = 0;
u8 b0 = m_buffer[m_offset++];
u8 b1 = m_buffer[m_offset++];
value |= (u8(b1) << 8);
value |= (u8(b0));
return *this;
}
BufferStream& operator<<(i16 value)
{
m_buffer[m_offset++] = value;
m_buffer[m_offset++] = (u8)(value >> 8);
return *this;
}
BufferStream& operator>>(i16& value)
{
if (m_offset + sizeof(value) > unsigned(m_buffer.size())) {
m_read_failure = true;
return *this;
}
value = 0;
u8 b0 = m_buffer[m_offset++];
u8 b1 = m_buffer[m_offset++];
value |= (u8(b1) << 8);
value |= (u8(b0));
return *this;
}
BufferStream& operator<<(u32 value)
{
m_buffer[m_offset++] = value;
m_buffer[m_offset++] = (u8)(value >> 8);
m_buffer[m_offset++] = (u8)(value >> 16);
m_buffer[m_offset++] = (u8)(value >> 24);
return *this;
}
BufferStream& operator>>(u32& value)
{
if (m_offset + sizeof(value) > unsigned(m_buffer.size())) {
m_read_failure = true;
return *this;
}
u8 b0 = m_buffer[m_offset++];
u8 b1 = m_buffer[m_offset++];
u8 b2 = m_buffer[m_offset++];
u8 b3 = m_buffer[m_offset++];
value = 0;
value |= (u8(b3) << 24);
value |= (u8(b2) << 16);
value |= (u8(b1) << 8);
value |= (u8(b0));
return *this;
}
BufferStream& operator<<(i32 value)
{
m_buffer[m_offset++] = value;
m_buffer[m_offset++] = (u8)(value >> 8);
m_buffer[m_offset++] = (u8)(value >> 16);
m_buffer[m_offset++] = (u8)(value >> 24);
return *this;
}
BufferStream& operator>>(i32& value)
{
if (m_offset + sizeof(value) > unsigned(m_buffer.size())) {
m_read_failure = true;
return *this;
}
u8 b0 = m_buffer[m_offset++];
u8 b1 = m_buffer[m_offset++];
u8 b2 = m_buffer[m_offset++];
u8 b3 = m_buffer[m_offset++];
value = 0;
value |= (u8(b3) << 24);
value |= (u8(b2) << 16);
value |= (u8(b1) << 8);
value |= (u8(b0));
return *this;
}
BufferStream& operator<<(u64 value)
{
m_buffer[m_offset++] = value;
m_buffer[m_offset++] = (u8)(value >> 8);
m_buffer[m_offset++] = (u8)(value >> 16);
m_buffer[m_offset++] = (u8)(value >> 24);
m_buffer[m_offset++] = (u8)(value >> 32);
m_buffer[m_offset++] = (u8)(value >> 40);
m_buffer[m_offset++] = (u8)(value >> 48);
m_buffer[m_offset++] = (u8)(value >> 56);
return *this;
}
BufferStream& operator>>(u64& value)
{
if (m_offset + sizeof(value) > unsigned(m_buffer.size())) {
m_read_failure = true;
return *this;
}
u8 b0 = m_buffer[m_offset++];
u8 b1 = m_buffer[m_offset++];
u8 b2 = m_buffer[m_offset++];
u8 b3 = m_buffer[m_offset++];
u8 b4 = m_buffer[m_offset++];
u8 b5 = m_buffer[m_offset++];
u8 b6 = m_buffer[m_offset++];
u8 b7 = m_buffer[m_offset++];
value = 0;
value |= ((long long)b7 << 56);
value |= ((long long)b6 << 48);
value |= ((long long)b5 << 40);
value |= ((long long)b4 << 32);
value |= ((long long)b3 << 24);
value |= ((long long)b2 << 16);
value |= ((long long)b1 << 8);
value |= ((long long)b0);
return *this;
}
BufferStream& operator<<(i64 value)
{
m_buffer[m_offset++] = value;
m_buffer[m_offset++] = (u8)(value >> 8);
m_buffer[m_offset++] = (u8)(value >> 16);
m_buffer[m_offset++] = (u8)(value >> 24);
m_buffer[m_offset++] = (u8)(value >> 32);
m_buffer[m_offset++] = (u8)(value >> 40);
m_buffer[m_offset++] = (u8)(value >> 48);
m_buffer[m_offset++] = (u8)(value >> 56);
return *this;
}
BufferStream& operator>>(i64& value)
{
if (m_offset + sizeof(value) > unsigned(m_buffer.size())) {
m_read_failure = true;
return *this;
}
u8 b0 = m_buffer[m_offset++];
u8 b1 = m_buffer[m_offset++];
u8 b2 = m_buffer[m_offset++];
u8 b3 = m_buffer[m_offset++];
u8 b4 = m_buffer[m_offset++];
u8 b5 = m_buffer[m_offset++];
u8 b6 = m_buffer[m_offset++];
u8 b7 = m_buffer[m_offset++];
value = 0;
value |= ((long long)b7 << 56);
value |= ((long long)b6 << 48);
value |= ((long long)b5 << 40);
value |= ((long long)b4 << 32);
value |= ((long long)b3 << 24);
value |= ((long long)b2 << 16);
value |= ((long long)b1 << 8);
value |= ((long long)b0);
return *this;
}
BufferStream& operator<<(const char* value)
{
return *this << StringView(value);
}
BufferStream& operator<<(const StringView& value)
{
for (size_t i = 0; i < value.length(); ++i)
m_buffer[m_offset++] = value[i];
return *this;
}
BufferStream& operator<<(const ByteBuffer& value)
{
for (size_t i = 0; i < value.size(); ++i)
m_buffer[m_offset++] = value[i];
return *this;
}
bool at_end() const
{
return m_offset == m_buffer.size();
}
void fill_to_end(u8 ch)
{
while (!at_end())
m_buffer[m_offset++] = ch;
}
ssize_t offset() const { return m_offset; }
void snip()
{
m_buffer.trim(m_offset);
}
void reset()
{
m_offset = 0;
m_read_failure = false;
}
bool handle_read_failure()
{
bool old = m_read_failure;
m_read_failure = false;
return old;
}
private:
ByteBuffer& m_buffer;
size_t m_offset { 0 };
bool m_read_failure { false };
};
}
using AK::BufferStream;