#include "WinFileStream.h"

namespace LifeCore
{
	WinFileStream::WinFileStream(const String& path)
		:hFile(0)
	{
		hFile = CreateFileA(path.c_str(), GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
	}
	WinFileStream::~WinFileStream()
	{
		if(hFile)
		{
			CloseHandle(hFile);
		}
	}
	void WinFileStream::Close()
	{
		CloseHandle(hFile);
		hFile = NULL;
	}
	size_t WinFileStream::Read(void* pBuffer, size_t countBytes)
	{
		unsigned long countRead = 0;
		ReadFile(hFile, pBuffer, countBytes, &countRead, NULL);
		return (int)countRead;
	}
	size_t WinFileStream::Write(const void* pBuffer, size_t countBytes)
	{
		unsigned long countWrite = 0;
		WriteFile(hFile, pBuffer, countBytes, &countWrite, NULL);
		return (int)countWrite;
	}
	void WinFileStream::Seek(int position)
	{
		SetFilePointer(hFile, position, NULL, SEEK_SET);
	}
	size_t WinFileStream::Tell()
	{
		return SetFilePointer(hFile, 0, NULL, SEEK_CUR);
	}
	size_t WinFileStream::Length()
	{
		int pos = Tell();
		int length = SetFilePointer(hFile, 0, NULL, SEEK_END);
		SetFilePointer(hFile, pos, NULL, SEEK_SET);
		return length;
	}
	bool WinFileStream::CanRead()
	{
		return true;
	}
	bool WinFileStream::CanWrite()
	{
		return true;
	}
}