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miham

(svn r9392) -Update: WebTranslator2 update to 2007-03-21 19:54:29
brazilian_portuguese - 2 changed by fukumori (2)
danish - 11 fixed, 2 changed by ThomasA (13)
esperanto - 8 fixed by LaPingvino (8)
estonian - 28 fixed by vermon (27), t2t2 (1)
finnish - 19 fixed, 66 changed by pallokala (9), habazi (76)
french - 9 changed by Skiper (9)
italian - 1 fixed, 49 changed by sidew (50)
traditional_chinese - 2 fixed by thomasau (2)
ukrainian - 9 changed by mad (9)

/* $Id$ */

#ifndef CMD_HELPER_H
#define CMD_HELPER_H

#include "direction.h"
#include "macros.h"
#include "road.h"


template<uint N> static inline void ExtractValid();
template<> static inline void ExtractValid<1>() {}


template<typename T> struct ExtractBits;
template<> struct ExtractBits<Axis>          { static const uint Count =  1; };
template<> struct ExtractBits<DiagDirection> { static const uint Count =  2; };
template<> struct ExtractBits<RoadBits>      { static const uint Count =  4; };


template<typename T, uint N, typename U> static inline T Extract(U v)
{
	// Check if there are enough bits in v
	ExtractValid<N + ExtractBits<T>::Count <= sizeof(U) * 8>();
	return (T)GB(v, N, ExtractBits<T>::Count);
}

#endif