| 1 |
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| 2 | /** \class DelphesPileUpReader
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| 3 | *
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| 4 | * Reads pile-up binary file
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| 5 | *
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| 6 | *
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| 7 | * $Date$
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| 8 | * $Revision$
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| 9 | *
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| 10 | *
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| 11 | * \author P. Demin - UCL, Louvain-la-Neuve
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| 12 | *
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| 13 | */
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| 14 |
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| 15 | #include "classes/DelphesPileUpReader.h"
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| 16 |
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| 17 | #include <stdexcept>
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| 18 | #include <iostream>
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| 19 | #include <sstream>
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| 20 |
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| 21 | #include <stdio.h>
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| 22 | #include <rpc/types.h>
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| 23 | #include <rpc/xdr.h>
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| 24 |
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| 25 | using namespace std;
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| 26 |
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| 27 | static const int kIndexSize = 10000000;
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| 28 | static const int kBufferSize = 1000000;
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| 29 | static const int kRecordSize = 9;
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| 30 |
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| 31 | //------------------------------------------------------------------------------
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| 32 |
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| 33 | DelphesPileUpReader::DelphesPileUpReader(const char *fileName) :
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| 34 | fEntries(0), fEntrySize(0), fCounter(0),
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| 35 | fPileUpFile(0), fIndex(0), fBuffer(0),
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| 36 | fInputXDR(0), fIndexXDR(0), fBufferXDR(0)
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| 37 | {
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| 38 | stringstream message;
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| 39 |
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| 40 | fIndex = new char[kIndexSize*8];
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| 41 | fBuffer = new char[kBufferSize*kRecordSize*4];
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| 42 | fInputXDR = new XDR;
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| 43 | fIndexXDR = new XDR;
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| 44 | fBufferXDR = new XDR;
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| 45 | xdrmem_create(fIndexXDR, fIndex, kIndexSize*8, XDR_DECODE);
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| 46 | xdrmem_create(fBufferXDR, fBuffer, kBufferSize*kRecordSize*4, XDR_DECODE);
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| 47 |
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| 48 | fPileUpFile = fopen(fileName, "r");
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| 49 |
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| 50 | if(fPileUpFile == NULL)
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| 51 | {
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| 52 | message << "can't open pile-up file " << fileName;
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| 53 | throw runtime_error(message.str());
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| 54 | }
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| 55 |
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| 56 | xdrstdio_create(fInputXDR, fPileUpFile, XDR_DECODE);
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| 57 |
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| 58 | // read number of events
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| 59 | fseeko(fPileUpFile, -8, SEEK_END);
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| 60 | xdr_hyper(fInputXDR, &fEntries);
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| 61 |
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| 62 | if(fEntries >= kIndexSize)
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| 63 | {
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| 64 | message << "too many events in pile-up file " << fileName;
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| 65 | throw runtime_error(message.str());
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| 66 | }
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| 67 |
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| 68 | // read index of events
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| 69 | fseeko(fPileUpFile, -8 - 8*fEntries, SEEK_END);
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| 70 | xdr_opaque(fInputXDR, fIndex, fEntries*8);
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| 71 | }
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| 72 |
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| 73 | //------------------------------------------------------------------------------
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| 74 |
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| 75 | DelphesPileUpReader::~DelphesPileUpReader()
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| 76 | {
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| 77 | xdr_destroy(fInputXDR);
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| 78 | if(fPileUpFile) fclose(fPileUpFile);
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| 79 | xdr_destroy(fBufferXDR);
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| 80 | xdr_destroy(fIndexXDR);
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| 81 | if(fBufferXDR) delete fBufferXDR;
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| 82 | if(fIndexXDR) delete fIndexXDR;
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| 83 | if(fInputXDR) delete fInputXDR;
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| 84 | if(fBuffer) delete[] fBuffer;
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| 85 | if(fIndex) delete[] fIndex;
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| 86 | }
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| 87 |
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| 88 | //------------------------------------------------------------------------------
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| 89 |
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| 90 | bool DelphesPileUpReader::ReadParticle(int &pid,
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| 91 | float &x, float &y, float &z, float &t,
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| 92 | float &px, float &py, float &pz, float &e)
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| 93 | {
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| 94 | if(fCounter >= fEntrySize) return false;
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| 95 |
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| 96 | xdr_int(fBufferXDR, &pid);
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| 97 | xdr_float(fBufferXDR, &x);
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| 98 | xdr_float(fBufferXDR, &y);
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| 99 | xdr_float(fBufferXDR, &z);
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| 100 | xdr_float(fBufferXDR, &t);
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| 101 | xdr_float(fBufferXDR, &px);
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| 102 | xdr_float(fBufferXDR, &py);
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| 103 | xdr_float(fBufferXDR, &pz);
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| 104 | xdr_float(fBufferXDR, &e);
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| 105 |
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| 106 | ++fCounter;
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| 107 |
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| 108 | return true;
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| 109 | }
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| 110 |
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| 111 | //------------------------------------------------------------------------------
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| 112 |
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| 113 | bool DelphesPileUpReader::ReadEntry(quad_t entry)
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| 114 | {
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| 115 | quad_t offset;
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| 116 |
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| 117 | if(entry >= fEntries) return false;
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| 118 |
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| 119 | // read event position
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| 120 | xdr_setpos(fIndexXDR, 8*entry);
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| 121 | xdr_hyper(fIndexXDR, &offset);
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| 122 |
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| 123 | // read event
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| 124 | fseeko(fPileUpFile, offset, SEEK_SET);
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| 125 | xdr_int(fInputXDR, &fEntrySize);
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| 126 |
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| 127 | if(fEntrySize >= kBufferSize)
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| 128 | {
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| 129 | throw runtime_error("too many particles in pile-up event");
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| 130 | }
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| 131 |
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| 132 | xdr_opaque(fInputXDR, fBuffer, fEntrySize*kRecordSize*4);
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| 133 | xdr_setpos(fBufferXDR, 0);
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| 134 | fCounter = 0;
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| 135 |
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| 136 | return true;
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| 137 | }
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| 138 |
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| 139 | //------------------------------------------------------------------------------
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