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/****************************************************************************
*
* This is a part of TOTEM offline software.
* Authors:
* Laurent Forthomme (laurent.forthomme@cern.ch)
*
****************************************************************************/
#ifndef DataFormats_CTPPSDetId_TotemT2DetId
#define DataFormats_CTPPSDetId_TotemT2DetId
#include "DataFormats/CTPPSDetId/interface/CTPPSDetId.h"
#include <iosfwd>
#include <string>
/**
*\brief Detector ID class for Totem T2 detectors.
* Bits [19:31] : Base CTPPSDetId class attributes
* Bits [16:18] : 3 bits for T2 plane [0-7]
* Bits [14:15] : 2 bits for T2 tile numbers [0-3]
* Bits [0:13] : unspecified yet
**/
class TotemT2DetId : public CTPPSDetId {
public:
/// Construct from a raw id
explicit TotemT2DetId(uint32_t id);
TotemT2DetId(const CTPPSDetId& id) : CTPPSDetId(id) {}
/// Construct from hierarchy indices.
TotemT2DetId(uint32_t arm, uint32_t plane, uint32_t channel = 0);
static constexpr uint32_t startPlaneBit = 16, maskPlane = 0x7, maxPlane = 7, lowMaskPlane = 0xffff;
static constexpr uint32_t startChannelBit = 14, maskChannel = 0x3, maxChannel = 3, lowMaskChannel = 0x1fff;
/// returns true if the raw ID is a PPS-timing one
static bool check(unsigned int raw) {
return (((raw >> DetId::kDetOffset) & 0xF) == DetId::VeryForward &&
((raw >> DetId::kSubdetOffset) & 0x7) == sdTotemT2);
}
//-------------------- getting and setting methods --------------------
uint32_t plane() const { return ((id_ >> startPlaneBit) & maskPlane); }
void setPlane(uint32_t channel) {
id_ &= ~(maskPlane << startPlaneBit);
id_ |= ((channel & maskPlane) << startPlaneBit);
}
uint32_t channel() const { return ((id_ >> startChannelBit) & maskChannel); }
void setChannel(uint32_t channel) {
id_ &= ~(maskChannel << startChannelBit);
id_ |= ((channel & maskChannel) << startChannelBit);
}
//-------------------- id getters for higher-level objects --------------------
TotemT2DetId planeId() const { return TotemT2DetId(rawId() & (~lowMaskPlane)); }
//-------------------- name methods --------------------
void planeName(std::string& name, NameFlag flag = nFull) const;
void channelName(std::string& name, NameFlag flag = nFull) const;
};
std::ostream& operator<<(std::ostream& os, const TotemT2DetId& id);
namespace std {
template <>
struct hash<TotemT2DetId> {
typedef TotemT2DetId argument_type;
typedef std::size_t result_type;
result_type operator()(const argument_type& id) const noexcept { return std::hash<uint64_t>()(id.rawId()); }
};
} // namespace std
#endif
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