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#pragma once
#include "StarBuffer.hpp"
#include "StarDataStream.hpp"
namespace Star {
// Implements DataStream using function objects as implementations of read/write.
class DataStreamFunctions : public DataStream {
public:
// Either reader or writer can be unset, if unset then the readData/writeData
// implementations will throw DataStreamException as unimplemented.
DataStreamFunctions(function<size_t(char*, size_t)> reader, function<size_t(char const*, size_t)> writer);
void readData(char* data, size_t len) override;
void writeData(char const* data, size_t len) override;
private:
function<size_t(char*, size_t)> m_reader;
function<size_t(char const*, size_t)> m_writer;
};
class DataStreamIODevice : public DataStream {
public:
DataStreamIODevice(IODevicePtr device);
IODevicePtr const& device() const;
void seek(size_t pos, IOSeek seek = IOSeek::Absolute);
bool atEnd();
StreamOffset pos();
void readData(char* data, size_t len) override;
void writeData(char const* data, size_t len) override;
private:
IODevicePtr m_device;
};
class DataStreamBuffer : public DataStream {
public:
// Convenience methods to serialize to / from ByteArray directly without
// having to construct a temporary DataStreamBuffer to do it
template <typename T>
static ByteArray serialize(T const& t);
template <typename T>
static ByteArray serializeContainer(T const& t);
template <typename T, typename WriteFunction>
static ByteArray serializeContainer(T const& t, WriteFunction writeFunction);
template <typename T>
static ByteArray serializeMapContainer(T const& t);
template <typename T, typename WriteFunction>
static ByteArray serializeMapContainer(T const& t, WriteFunction writeFunction);
template <typename T>
static void deserialize(T& t, ByteArray data);
template <typename T>
static void deserializeContainer(T& t, ByteArray data);
template <typename T, typename ReadFunction>
static void deserializeContainer(T& t, ByteArray data, ReadFunction readFunction);
template <typename T>
static void deserializeMapContainer(T& t, ByteArray data);
template <typename T, typename ReadFunction>
static void deserializeMapContainer(T& t, ByteArray data, ReadFunction readFunction);
template <typename T>
static T deserialize(ByteArray data);
template <typename T>
static T deserializeContainer(ByteArray data);
template <typename T, typename ReadFunction>
static T deserializeContainer(ByteArray data, ReadFunction readFunction);
template <typename T>
static T deserializeMapContainer(ByteArray data);
template <typename T, typename ReadFunction>
static T deserializeMapContainer(ByteArray data, ReadFunction readFunction);
DataStreamBuffer();
DataStreamBuffer(size_t initialSize);
DataStreamBuffer(ByteArray b);
// Resize existing buffer to new size.
void resize(size_t size);
void reserve(size_t size);
void clear();
ByteArray& data();
ByteArray const& data() const;
ByteArray takeData();
char* ptr();
char const* ptr() const;
BufferPtr const& device() const;
size_t size() const;
bool empty() const;
void seek(size_t pos, IOSeek seek = IOSeek::Absolute);
bool atEnd();
size_t pos();
// Set new buffer.
void reset(size_t newSize);
void reset(ByteArray b);
void readData(char* data, size_t len) override;
void writeData(char const* data, size_t len) override;
private:
BufferPtr m_buffer;
};
class DataStreamExternalBuffer : public DataStream {
public:
DataStreamExternalBuffer();
DataStreamExternalBuffer(ByteArray const& byteArray);
DataStreamExternalBuffer(DataStreamBuffer const& buffer);
DataStreamExternalBuffer(DataStreamExternalBuffer const& buffer) = default;
DataStreamExternalBuffer(char const* externalData, size_t len);
char const* ptr() const;
size_t size() const;
bool empty() const;
void seek(size_t pos, IOSeek mode = IOSeek::Absolute);
bool atEnd();
size_t pos();
size_t remaining();
void reset(char const* externalData, size_t len);
void readData(char* data, size_t len) override;
void writeData(char const* data, size_t len) override;
private:
ExternalBuffer m_buffer;
};
template <typename T>
ByteArray DataStreamBuffer::serialize(T const& t) {
DataStreamBuffer ds;
ds.write(t);
return ds.takeData();
}
template <typename T>
ByteArray DataStreamBuffer::serializeContainer(T const& t) {
DataStreamBuffer ds;
ds.writeContainer(t);
return ds.takeData();
}
template <typename T, typename WriteFunction>
ByteArray DataStreamBuffer::serializeContainer(T const& t, WriteFunction writeFunction) {
DataStreamBuffer ds;
ds.writeContainer(t, writeFunction);
return ds.takeData();
}
template <typename T>
ByteArray DataStreamBuffer::serializeMapContainer(T const& t) {
DataStreamBuffer ds;
ds.writeMapContainer(t);
return ds.takeData();
}
template <typename T, typename WriteFunction>
ByteArray DataStreamBuffer::serializeMapContainer(T const& t, WriteFunction writeFunction) {
DataStreamBuffer ds;
ds.writeMapContainer(t, writeFunction);
return ds.takeData();
}
template <typename T>
void DataStreamBuffer::deserialize(T& t, ByteArray data) {
DataStreamBuffer ds(std::move(data));
ds.read(t);
}
template <typename T>
void DataStreamBuffer::deserializeContainer(T& t, ByteArray data) {
DataStreamBuffer ds(std::move(data));
ds.readContainer(t);
}
template <typename T, typename ReadFunction>
void DataStreamBuffer::deserializeContainer(T& t, ByteArray data, ReadFunction readFunction) {
DataStreamBuffer ds(std::move(data));
ds.readContainer(t, readFunction);
}
template <typename T>
void DataStreamBuffer::deserializeMapContainer(T& t, ByteArray data) {
DataStreamBuffer ds(std::move(data));
ds.readMapContainer(t);
}
template <typename T, typename ReadFunction>
void DataStreamBuffer::deserializeMapContainer(T& t, ByteArray data, ReadFunction readFunction) {
DataStreamBuffer ds(std::move(data));
ds.readMapContainer(t, readFunction);
}
template <typename T>
T DataStreamBuffer::deserialize(ByteArray data) {
T t;
deserialize(t, std::move(data));
return t;
}
template <typename T>
T DataStreamBuffer::deserializeContainer(ByteArray data) {
T t;
deserializeContainer(t, std::move(data));
return t;
}
template <typename T, typename ReadFunction>
T DataStreamBuffer::deserializeContainer(ByteArray data, ReadFunction readFunction) {
T t;
deserializeContainer(t, std::move(data), readFunction);
return t;
}
template <typename T>
T DataStreamBuffer::deserializeMapContainer(ByteArray data) {
T t;
deserializeMapContainer(t, std::move(data));
return t;
}
template <typename T, typename ReadFunction>
T DataStreamBuffer::deserializeMapContainer(ByteArray data, ReadFunction readFunction) {
T t;
deserializeMapContainer(t, std::move(data), readFunction);
return t;
}
}
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