PersistentEncoder.cpp [plain text]
#include "config.h"
#include <wtf/persistence/PersistentEncoder.h>
#include <wtf/SHA1.h>
namespace WTF {
namespace Persistence {
Encoder::Encoder()
{
}
Encoder::~Encoder()
{
}
uint8_t* Encoder::grow(size_t size)
{
size_t newPosition = m_buffer.size();
m_buffer.grow(m_buffer.size() + size);
return m_buffer.data() + newPosition;
}
void Encoder::updateChecksumForData(SHA1& sha1, const uint8_t* data, size_t size)
{
auto typeSalt = Salt<uint8_t*>::value;
sha1.addBytes(reinterpret_cast<uint8_t*>(&typeSalt), sizeof(typeSalt));
sha1.addBytes(data, size);
}
void Encoder::encodeFixedLengthData(const uint8_t* data, size_t size)
{
updateChecksumForData(m_sha1, data, size);
uint8_t* buffer = grow(size);
memcpy(buffer, data, size);
}
template<typename Type>
Encoder& Encoder::encodeNumber(Type value)
{
Encoder::updateChecksumForNumber(m_sha1, value);
uint8_t* buffer = grow(sizeof(Type));
memcpy(buffer, &value, sizeof(Type));
return *this;
}
Encoder& Encoder::operator<<(bool value)
{
return encodeNumber(value);
}
Encoder& Encoder::operator<<(uint8_t value)
{
return encodeNumber(value);
}
Encoder& Encoder::operator<<(uint16_t value)
{
return encodeNumber(value);
}
Encoder& Encoder::operator<<(int16_t value)
{
return encodeNumber(value);
}
Encoder& Encoder::operator<<(uint32_t value)
{
return encodeNumber(value);
}
Encoder& Encoder::operator<<(uint64_t value)
{
return encodeNumber(value);
}
Encoder& Encoder::operator<<(int32_t value)
{
return encodeNumber(value);
}
Encoder& Encoder::operator<<(int64_t value)
{
return encodeNumber(value);
}
Encoder& Encoder::operator<<(float value)
{
return encodeNumber(value);
}
Encoder& Encoder::operator<<(double value)
{
return encodeNumber(value);
}
void Encoder::encodeChecksum()
{
SHA1::Digest hash;
m_sha1.computeHash(hash);
encodeFixedLengthData(hash.data(), hash.size());
}
}
}