winamp/Src/nu/AutoWide.h

#ifndef AUTOWIDEH
#define AUTOWIDEH
#ifdef WIN32
#include <windows.h>

inline wchar_t *AutoWideDup( const char *convert, UINT codePage = CP_ACP )
{
	if ( !convert )
		return 0;

	int size = MultiByteToWideChar( codePage, 0, convert, -1, 0, 0 );
	if ( !size )
		return 0;

	wchar_t *wide = (wchar_t *)malloc( size * sizeof( wchar_t ) );

	if ( !MultiByteToWideChar( codePage, 0, convert, -1, wide, size ) )
	{
		free( wide );
		wide = 0;
	}

	return wide;
}

class AutoWide
{
public:
	AutoWide( const char *convert, UINT codePage = CP_ACP )
	{
		wide = AutoWideDup( convert, codePage );
	}
	~AutoWide()
	{
		free( wide );
		wide = 0;
	}
	operator wchar_t *( )
	{
		return wide;
	}
	operator const wchar_t *( )
	{
		return wide;
	}
	operator bool()
	{
		return !!wide;
	}

private:
	wchar_t *wide = 0;
};

#elif defined(__APPLE__)
#include <string.h>
inline wchar_t *AutoWideDup( const char *convert )
{
	if ( !convert )
		return 0;

	int size = strlen( convert ) + 1;
	if ( !size )
		return 0;

	wchar_t *wide = (wchar_t *)malloc( size * sizeof( wchar_t ) );

	if ( mbstowcs( wide, convert, size ) == (size_t)-1 )
	{
		free( wide );
		wide = 0;
	}

	return wide;
}

class AutoWide
{
public:
	AutoWide( const char *convert )
	{
		wide = AutoWideDup( convert );
	}
	~AutoWide()
	{
		free( wide );
		wide = 0;
	}
	operator wchar_t *( )
	{
		return wide;
	}
private:
	wchar_t *wide = 0;
};

#endif

#endif