// Copyright (c) 2013, NetEase Inc. All rights reserved.
//
// wrt(guangguang)
// 2013/8/29
//
// Multi-byte strings and Unicode strings conversion, etc.

#include "base/win32/win_util.h"

#if defined(OS_WIN)

namespace nbase
{
namespace win32
{

bool MBCSToUnicode(const char *input, std::wstring& output, int code_page)
{
	output.clear();
	int length = ::MultiByteToWideChar(code_page, 0, input, -1, NULL, 0);
	if (length <= 0)
		return false;
	output.resize(length-1);
	if (output.empty())
		return true;
	::MultiByteToWideChar(code_page,
						  0,
						  input,
						  -1,
						  &output[0],
						  static_cast<int>(output.size()));
	return true;
}

bool MBCSToUnicode(const std::string &input, std::wstring& output, int code_page)
{
	output.clear();
	int length = ::MultiByteToWideChar(code_page, 0, input.c_str(), static_cast<int>(input.size()), NULL, 0);
	output.resize(length);
	if (output.empty())
		return true;
	::MultiByteToWideChar(code_page,
						  0,
						  input.c_str(),
						  static_cast<int>(input.size()),
						  &output[0],
						  static_cast<int>(output.size()));
	return true;
}

bool UnicodeToMBCS(const wchar_t *input, std::string &output, int code_page)
{
	output.clear();
	int length = ::WideCharToMultiByte(code_page, 0, input, -1, NULL, 0, NULL, NULL);
	if (length <= 0)
		return false;
	output.resize(length-1);
	if (output.empty())
		return true;
	::WideCharToMultiByte(code_page,
						  0,
						  input,
						  length-1,
						  &output[0],
						  static_cast<int>(output.size()),
						  NULL,
						  NULL);
	return true;
}

bool UnicodeToMBCS(const std::wstring& input, std::string &output, int code_page)
{
	output.clear();
	int length = ::WideCharToMultiByte(code_page, 0, input.c_str(), static_cast<int>(input.size()), NULL, 0, NULL, NULL);
	output.resize(length);
	if (output.empty())
		return true;
	::WideCharToMultiByte(code_page,
						  0,
						  input.c_str(),
						  static_cast<int>(input.size()),
						  &output[0],
						  static_cast<int>(output.size()),
						  NULL,
						  NULL);
	return true;
}

} // namespace win32
} // namespace nbase

#endif // OS_WIN