72 lines
1.7 KiB
C++
72 lines
1.7 KiB
C++
#pragma once
|
|
|
|
#include "../Interop/Interop.hpp"
|
|
|
|
using namespace openloco::interop;
|
|
|
|
namespace openloco
|
|
{
|
|
|
|
class FormatArguments
|
|
{
|
|
private:
|
|
std::byte* _buffer;
|
|
std::byte* _bufferStart;
|
|
size_t _length;
|
|
|
|
public:
|
|
FormatArguments(std::byte* buffer, size_t length)
|
|
{
|
|
_bufferStart = buffer;
|
|
_buffer = _bufferStart;
|
|
_length = length;
|
|
}
|
|
|
|
FormatArguments()
|
|
{
|
|
loco_global<std::byte[0x0112C83A - 0x0112C826], 0x0112C826> _commonFormatArgs;
|
|
|
|
_bufferStart = _buffer = &*_commonFormatArgs;
|
|
_length = std::size(_commonFormatArgs);
|
|
}
|
|
|
|
// Size in bytes to skip forward the buffer
|
|
void skip(const size_t size)
|
|
{
|
|
auto* const nextOffset = getNextOffset(size);
|
|
|
|
_buffer = nextOffset;
|
|
}
|
|
|
|
template<typename T>
|
|
void push(T arg)
|
|
{
|
|
static_assert(sizeof(T) % 2 == 0, "Tried to push an odd number of bytes onto the format args!");
|
|
auto* nextOffset = getNextOffset(sizeof(T));
|
|
|
|
*(T*)_buffer = arg;
|
|
_buffer = nextOffset;
|
|
}
|
|
|
|
const void* operator&()
|
|
{
|
|
return _bufferStart;
|
|
}
|
|
|
|
size_t getLength() const
|
|
{
|
|
return _buffer - _bufferStart;
|
|
}
|
|
|
|
private:
|
|
std::byte* getNextOffset(const size_t size) const
|
|
{
|
|
std::byte* const nextOffset = reinterpret_cast<std::byte*>(reinterpret_cast<std::byte*>(_buffer) + size);
|
|
if (nextOffset > _bufferStart + _length)
|
|
throw std::out_of_range("FormatArguments: attempting to advance outside of buffer");
|
|
return nextOffset;
|
|
}
|
|
};
|
|
|
|
}
|