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path: root/source/modules/asura-utils/IO/binding/_data_buffer.cpp
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#include "../DataBuffer.h"

using namespace Luax;

namespace AsuraEngine
{
	namespace IO
	{

		LUAX_REGISTRY(DataBuffer)
		{
			LUAX_REGISTER_METHODS(state, 
				{ "New",         _New         },
				{ "GetData",     _GetData     },
				{ "GetSize",     _GetSize     },
				{ "GetCapacity", _GetCapacity },
				{ "Refactor",    _Refactor    },
				{ "Load",        _Load        },
				{ "Clear",       _Clear       }
			);
		}

		LUAX_POSTPROCESS(DataBuffer)
		{
		}

		// databuffer = DataBuffer.New(lstring)
		// databuffer = DataBuffer.New(capacity)
		LUAX_IMPL_METHOD(DataBuffer, _New)
		{
			LUAX_STATE(L);

			if (state.IsType(1, LUA_TSTRING))
			{
				size_t size;
				const byte* bytes = lua_tolstring(L, 1, &size);
				DataBuffer* buffer = new DataBuffer(bytes, size);
				buffer->PushLuaxUserdata(state);
				return 1;
			}
			else if (state.IsType(1, LUA_TNUMBER))
			{
				size_t capacity = lua_tonumber(L, 1);
				DataBuffer* buffer = new DataBuffer(capacity);
				buffer->PushLuaxUserdata(state);
				return 1;
			}
			else
			{
				return state.ErrorType(1, "number or string");
			}
		}

		// lsting, len = databuffer:GetData()
		LUAX_IMPL_METHOD(DataBuffer, _GetData)
		{
			LUAX_SETUP(L, "U");

			DataBuffer* self = state.GetUserdata<DataBuffer>(1);
			lua_pushlstring(L, self->GetData(), self->GetSize());
			return 1;
		}

		// length = databuffer:GetSize()
		LUAX_IMPL_METHOD(DataBuffer, _GetSize)
		{
			LUAX_SETUP(L, "U");

			DataBuffer* self = state.GetUserdata<DataBuffer>(1);
			lua_pushinteger(L, self->GetSize());
			return 1;
		}

		// capacity = databuffer:GetCapacity()
		LUAX_IMPL_METHOD(DataBuffer, _GetCapacity)
		{
			LUAX_SETUP(L, "U");

			DataBuffer* self = state.GetUserdata<DataBuffer>(1);
			lua_pushinteger(L, self->GetCapacity());
			return 1;
		}

		// databuffer:Refactor(capacity)
		LUAX_IMPL_METHOD(DataBuffer, _Refactor)
		{
			LUAX_PREPARE(L, DataBuffer);

			size_t capacity = state.CheckValue<int>(2);
			self->Refactor(capacity);
			return 0;
		}

		// size = databuffer:Load(lstring)
		// size = databuffer:Load(src)
		LUAX_IMPL_METHOD(DataBuffer, _Load)
		{
			LUAX_STATE(L);

			DataBuffer* buffer = state.GetUserdata<DataBuffer>(1); 
			const byte* data;
			size_t size;
			if (state.IsType(2, LUA_TSTRING))
			{
				data = lua_tolstring(L, 2, &size);
				buffer->Load(data, size);
				return 0;
			}
			else if(state.IsType(2, LUA_TUSERDATA))
			{
				DataBuffer* src = state.CheckUserdata<DataBuffer>(2);
				buffer->Load(*src);
				return 0;
			}
			else
			{
				return state.ErrorType(1, "lstring or DataBuffer");
			}
		}

		// databuffer:Clear()
		LUAX_IMPL_METHOD(DataBuffer, _Clear)
		{
			LUAX_SETUP(L, "U");

			DataBuffer* self = state.GetUserdata<DataBuffer>(1);
			self->Clear(); 
			return 0;
		}

	}
}