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25 // 25 //
26 /// \file eventgenerator/HepMC/HepMCEx01/src/H 26 /// \file eventgenerator/HepMC/HepMCEx01/src/HEPEvtcom.cc
27 /// \brief Implementation of the HEPEvtcom cla 27 /// \brief Implementation of the HEPEvtcom class
28 // 28 //
>> 29 // $Id: HEPEvtcom.cc 73446 2013-08-27 11:32:59Z gcosmo $
29 // 30 //
30 // =========================================== 31 // ======================================================================
31 // PARAMETER (NMXHEP=4000) << 32 // PARAMETER (NMXHEP=4000)
32 // COMMON/HEPEVT/NEVHEP,NHEP,ISTHEP(NMXHE << 33 // COMMON/HEPEVT/NEVHEP,NHEP,ISTHEP(NMXHEP),IDHEP(NMXHEP),
33 // & JMOHEP(2,NMXHEP),JDAHEP(2,NMXH 34 // & JMOHEP(2,NMXHEP),JDAHEP(2,NMXHEP),PHEP(5,NMXHEP),VHEP(4,NMXHEP)
34 // =========================================== 35 // ======================================================================
35 ///******************************************* 36 ///**********************************************************/
36 ///* D E S C R I P T I O N : 37 ///* D E S C R I P T I O N : */
37 ///*------------------------------------------ 38 ///*--------------------------------------------------------*/
38 ///* NEVHEP - event number (or some s 39 ///* NEVHEP - event number (or some special meaning*/
39 ///* (see documentation for 40 ///* (see documentation for details) */
40 ///* NHEP - actual number of entrie 41 ///* NHEP - actual number of entries in current */
41 ///* event. 42 ///* event. */
42 ///* ISTHEP[IHEP] - status code for IHEP'th 43 ///* ISTHEP[IHEP] - status code for IHEP'th entry - see */
43 ///* documentation for deta 44 ///* documentation for details */
44 ///* IDHEP [IHEP] - IHEP'th particle identi 45 ///* IDHEP [IHEP] - IHEP'th particle identifier according*/
45 ///* to PDG. 46 ///* to PDG. */
46 ///* JMOHEP[IHEP][0] - pointer to position of 47 ///* JMOHEP[IHEP][0] - pointer to position of 1st mother */
47 ///* JMOHEP[IHEP][1] - pointer to position of 48 ///* JMOHEP[IHEP][1] - pointer to position of 2nd mother */
48 ///* JDAHEP[IHEP][0] - pointer to position of 49 ///* JDAHEP[IHEP][0] - pointer to position of 1st daughter */
49 ///* JDAHEP[IHEP][1] - pointer to position of 50 ///* JDAHEP[IHEP][1] - pointer to position of 2nd daughter */
50 ///* PHEP [IHEP][0] - X momentum [Gev/c] 51 ///* PHEP [IHEP][0] - X momentum [Gev/c] */
51 ///* PHEP [IHEP][1] - Y momentum [Gev/c] 52 ///* PHEP [IHEP][1] - Y momentum [Gev/c] */
52 ///* PHEP [IHEP][2] - Z momentum [Gev/c] 53 ///* PHEP [IHEP][2] - Z momentum [Gev/c] */
53 ///* PHEP [IHEP][3] - Energy [Gev] 54 ///* PHEP [IHEP][3] - Energy [Gev] */
54 ///* PHEP [IHEP][4] - Mass[Gev/c^2] 55 ///* PHEP [IHEP][4] - Mass[Gev/c^2] */
55 ///* VHEP [IHEP][0] - X vertex [mm] 56 ///* VHEP [IHEP][0] - X vertex [mm] */
56 ///* VHEP [IHEP][1] - Y vertex [mm] 57 ///* VHEP [IHEP][1] - Y vertex [mm] */
57 ///* VHEP [IHEP][2] - Z vertex [mm] 58 ///* VHEP [IHEP][2] - Z vertex [mm] */
58 ///* VHEP [IHEP][3] - production time [mm/c] 59 ///* VHEP [IHEP][3] - production time [mm/c] */
59 ///*========================================== 60 ///*========================================================*/
60 // 61 //
61 // This interface to HEPEVT common block treat 62 // This interface to HEPEVT common block treats the block as
62 // an array of bytes --- the precision and num << 63 // an array of bytes --- the precision and number of entries
63 // is determined "on the fly" by the wrapper a 64 // is determined "on the fly" by the wrapper and used to decode
64 // each entry. 65 // each entry.
65 // 66 //
66 // HEPEVT_EntriesAllocation is the maximum siz << 67 // HEPEVT_EntriesAllocation is the maximum size of the HEPEVT common block
67 // that can be interfaced. It is NOT the actua << 68 // that can be interfaced. It is NOT the actual size of the HEPEVT common
68 // used in each individual application. The ac 69 // used in each individual application. The actual size can be changed on
69 // the fly using HepMC::HEPEVT_Wrapper::set_ma 70 // the fly using HepMC::HEPEVT_Wrapper::set_max_number_entries().
70 // Thus HEPEVT_EntriesAllocation should typica 71 // Thus HEPEVT_EntriesAllocation should typically be set
71 // to the maximum possible number of entries - 72 // to the maximum possible number of entries --- 10000 is a good choice
72 // (and is the number used by ATLAS versions o 73 // (and is the number used by ATLAS versions of Pythia).
73 74
74 #include <ctype.h> 75 #include <ctype.h>
75 76
76 //....oooOO0OOooo........oooOO0OOooo........oo << 77 enum {HEPEVT_EntriesAllocation=4000};
77 78
78 enum << 79 const unsigned int hepevt_bytes_allocation =
79 { << 80 sizeof(long int) * ( 2 + 4 * HEPEVT_EntriesAllocation )
80 HEPEVT_EntriesAllocation = 4000 << 81 + sizeof(double) * ( 9 * HEPEVT_EntriesAllocation );
81 }; <<
82 <<
83 const unsigned int hepevt_bytes_allocation = s <<
84 + <<
85 82
86 //....oooOO0OOooo........oooOO0OOooo........oo << 83 extern "C" struct hepevt{
87 << 84 char data[hepevt_bytes_allocation];
88 extern "C" struct hepevt <<
89 { <<
90 char data[hepevt_bytes_allocation]; <<
91 }; 85 };
92 86
93 hepevt hepevt_; 87 hepevt hepevt_;
>> 88
94 89