libretro-dolphin/Source/Core/VideoCommon/VertexLoaderUtils.h

// Copyright 2008 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#pragma once

#include <cstring>

#include "Common/CommonTypes.h"
#include "Common/Inline.h"

extern u8* g_video_buffer_read_ptr;
extern u8* g_vertex_manager_write_ptr;

DOLPHIN_FORCE_INLINE void DataSkip(u32 skip)
{
  g_video_buffer_read_ptr += skip;
}

// probably unnecessary
template <int count>
DOLPHIN_FORCE_INLINE void DataSkip()
{
  g_video_buffer_read_ptr += count;
}

template <typename T>
DOLPHIN_FORCE_INLINE T DataPeek(int _uOffset, u8* bufp = g_video_buffer_read_ptr)
{
  T result;
  std::memcpy(&result, &bufp[_uOffset], sizeof(T));
  return Common::FromBigEndian(result);
}

template <typename T>
DOLPHIN_FORCE_INLINE T DataRead(u8** bufp = &g_video_buffer_read_ptr)
{
  auto const result = DataPeek<T>(0, *bufp);
  *bufp += sizeof(T);
  return result;
}

DOLPHIN_FORCE_INLINE u32 DataReadU32Unswapped()
{
  u32 result;
  std::memcpy(&result, g_video_buffer_read_ptr, sizeof(u32));
  g_video_buffer_read_ptr += sizeof(u32);
  return result;
}

DOLPHIN_FORCE_INLINE u8* DataGetPosition()
{
  return g_video_buffer_read_ptr;
}

template <typename T>
DOLPHIN_FORCE_INLINE void DataWrite(T data)
{
  std::memcpy(g_vertex_manager_write_ptr, &data, sizeof(T));
  g_vertex_manager_write_ptr += sizeof(T);
}