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#include "core/pch.hh"
#include "core/buffer.hh"
#include "core/constexpr.hh"
ReadBuffer::ReadBuffer(const void* data, std::size_t size)
{
reset(data, size);
}
ReadBuffer::ReadBuffer(const ENetPacket* packet)
{
reset(packet);
}
ReadBuffer::ReadBuffer(PHYSFS_File* file)
{
reset(file);
}
std::size_t ReadBuffer::size(void) const
{
return m_vector.size();
}
const std::byte* ReadBuffer::data(void) const
{
return m_vector.data();
}
void ReadBuffer::reset(const void* data, std::size_t size)
{
auto bytes = reinterpret_cast<const std::byte*>(data);
m_vector.assign(bytes, bytes + size);
m_position = 0U;
}
void ReadBuffer::reset(const ENetPacket* packet)
{
auto bytes_ptr = reinterpret_cast<const std::byte*>(packet->data);
m_vector.assign(bytes_ptr, bytes_ptr + packet->dataLength);
m_position = 0;
}
void ReadBuffer::reset(PHYSFS_File* file)
{
m_vector.resize(PHYSFS_fileLength(file));
m_position = 0;
PHYSFS_seek(file, 0);
PHYSFS_readBytes(file, m_vector.data(), m_vector.size());
}
float ReadBuffer::read_FP32(void)
{
return floathacks::uint32_to_float(read_UI32());
}
std::uint8_t ReadBuffer::read_UI8(void)
{
if((m_position + 1U) <= m_vector.size()) {
auto result = static_cast<std::uint8_t>(m_vector[m_position]);
m_position += 1U;
return result;
}
m_position += 1U;
return 0;
}
std::uint16_t ReadBuffer::read_UI16(void)
{
if((m_position + 2U) <= m_vector.size()) {
auto result = UINT16_C(0x0000);
result |= static_cast<std::uint16_t>(m_vector[m_position + 0U]) << 8U;
result |= static_cast<std::uint16_t>(m_vector[m_position + 1U]) << 0U;
m_position += 2U;
return result;
}
m_position += 2U;
return 0;
}
std::uint32_t ReadBuffer::read_UI32(void)
{
if((m_position + 4U) <= m_vector.size()) {
auto result = UINT32_C(0x00000000);
result |= static_cast<std::uint32_t>(m_vector[m_position + 0U]) << 24U;
result |= static_cast<std::uint32_t>(m_vector[m_position + 1U]) << 16U;
result |= static_cast<std::uint32_t>(m_vector[m_position + 2U]) << 8U;
result |= static_cast<std::uint32_t>(m_vector[m_position + 3U]) << 0U;
m_position += 4U;
return result;
}
m_position += 4U;
return 0;
}
std::uint64_t ReadBuffer::read_UI64(void)
{
if((m_position + 8U) <= m_vector.size()) {
auto result = UINT64_C(0x0000000000000000);
result |= (0x00000000000000FF & static_cast<std::uint64_t>(m_vector[m_position + 0U])) << 56U;
result |= (0x00000000000000FF & static_cast<std::uint64_t>(m_vector[m_position + 1U])) << 48U;
result |= (0x00000000000000FF & static_cast<std::uint64_t>(m_vector[m_position + 2U])) << 40U;
result |= (0x00000000000000FF & static_cast<std::uint64_t>(m_vector[m_position + 3U])) << 32U;
result |= (0x00000000000000FF & static_cast<std::uint64_t>(m_vector[m_position + 4U])) << 24U;
result |= (0x00000000000000FF & static_cast<std::uint64_t>(m_vector[m_position + 5U])) << 16U;
result |= (0x00000000000000FF & static_cast<std::uint64_t>(m_vector[m_position + 6U])) << 8U;
result |= (0x00000000000000FF & static_cast<std::uint64_t>(m_vector[m_position + 7U])) << 0U;
m_position += 8U;
return result;
}
m_position += 8U;
return 0;
}
std::string ReadBuffer::read_string(void)
{
auto size = static_cast<std::size_t>(read_UI16());
auto result = std::string();
for(std::size_t i = 0; i < size; ++i) {
if(m_position < m_vector.size()) {
result.push_back(static_cast<char>(m_vector[m_position]));
}
m_position += 1U;
}
return result;
}
std::size_t WriteBuffer::size(void) const
{
return m_vector.size();
}
const std::byte* WriteBuffer::data(void) const
{
return m_vector.data();
}
void WriteBuffer::reset(void)
{
m_vector.clear();
}
void WriteBuffer::write_UI8(std::uint8_t value)
{
m_vector.push_back(static_cast<std::byte>(value));
}
void WriteBuffer::write_UI16(std::uint16_t value)
{
m_vector.push_back(static_cast<std::byte>(UINT16_C(0xFF) & ((value & UINT16_C(0xFF00)) >> 8U)));
m_vector.push_back(static_cast<std::byte>(UINT16_C(0xFF) & ((value & UINT16_C(0x00FF)) >> 0U)));
}
void WriteBuffer::write_UI32(std::uint32_t value)
{
m_vector.push_back(static_cast<std::byte>(UINT32_C(0xFF) & ((value & UINT32_C(0xFF000000)) >> 24U)));
m_vector.push_back(static_cast<std::byte>(UINT32_C(0xFF) & ((value & UINT32_C(0x00FF0000)) >> 16U)));
m_vector.push_back(static_cast<std::byte>(UINT32_C(0xFF) & ((value & UINT32_C(0x0000FF00)) >> 8U)));
m_vector.push_back(static_cast<std::byte>(UINT32_C(0xFF) & ((value & UINT32_C(0x000000FF)) >> 0U)));
}
void WriteBuffer::write_UI64(std::uint64_t value)
{
m_vector.push_back(static_cast<std::byte>(UINT64_C(0xFF) & ((value & UINT64_C(0xFF00000000000000)) >> 56U)));
m_vector.push_back(static_cast<std::byte>(UINT64_C(0xFF) & ((value & UINT64_C(0x00FF000000000000)) >> 48U)));
m_vector.push_back(static_cast<std::byte>(UINT64_C(0xFF) & ((value & UINT64_C(0x0000FF0000000000)) >> 40U)));
m_vector.push_back(static_cast<std::byte>(UINT64_C(0xFF) & ((value & UINT64_C(0x000000FF00000000)) >> 32U)));
m_vector.push_back(static_cast<std::byte>(UINT64_C(0xFF) & ((value & UINT64_C(0x00000000FF000000)) >> 24U)));
m_vector.push_back(static_cast<std::byte>(UINT64_C(0xFF) & ((value & UINT64_C(0x0000000000FF0000)) >> 16U)));
m_vector.push_back(static_cast<std::byte>(UINT64_C(0xFF) & ((value & UINT64_C(0x000000000000FF00)) >> 8U)));
m_vector.push_back(static_cast<std::byte>(UINT64_C(0xFF) & ((value & UINT64_C(0x00000000000000FF)) >> 0U)));
}
void WriteBuffer::write_string(const std::string& value)
{
const std::size_t size = cxpr::min<std::size_t>(UINT16_MAX, value.size());
write_UI16(static_cast<std::uint16_t>(size));
for(std::size_t i = 0; i < size; m_vector.push_back(static_cast<std::byte>(value[i++])))
;
}
PHYSFS_File* WriteBuffer::to_file(const char* path, bool append) const
{
if(auto file = (append ? PHYSFS_openAppend(path) : PHYSFS_openWrite(path))) {
PHYSFS_writeBytes(file, m_vector.data(), m_vector.size());
return file;
}
return nullptr;
}
ENetPacket* WriteBuffer::to_packet(enet_uint32 flags) const
{
return enet_packet_create(m_vector.data(), m_vector.size(), flags);
}
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