| 1 | //--------------------------------------------------------------------------
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| 2 | //
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| 3 | // GenEventStreamIO.cc
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| 4 | // Author: Lynn Garren
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| 5 | //
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| 6 | // helper functions used by streaming IO
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| 7 | //
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| 8 | // ----------------------------------------------------------------------
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| 9 |
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| 10 | #include <ostream>
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| 11 | #include <istream>
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| 12 | #include <sstream>
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| 13 |
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| 14 | #include "GenVertex.h"
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| 15 | #include "GenParticle.h"
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| 16 | #include "StreamHelpers.h"
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| 17 | #include "IO_Exception.h"
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| 18 |
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| 19 | namespace HepMC {
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| 20 |
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| 21 | namespace detail {
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| 22 |
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| 23 | std::istream & read_vertex( std::istream & is,
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| 24 | TempParticleMap & particle_to_end_vertex,
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| 25 | GenVertex * v )
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| 26 | {
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| 27 | //
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| 28 | // make sure the stream is valid
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| 29 | if ( !is ) {
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| 30 | std::cerr << "StreamHelpers::detail::read_vertex setting badbit." << std::endl;
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| 31 | is.clear(std::ios::badbit);
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| 32 | return is;
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| 33 | }
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| 34 | //
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| 35 | // get the vertex line
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| 36 | std::string line;
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| 37 | std::getline(is,line);
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| 38 | std::istringstream iline(line);
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| 39 | std::string firstc;
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| 40 | iline >> firstc;
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| 41 | //
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| 42 | // test to be sure the next entry is of type "V"
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| 43 | if ( firstc != "V" ) {
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| 44 | std::cerr << "StreamHelpers::detail::read_vertex invalid line type: "
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| 45 | << firstc << std::endl;
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| 46 | std::cerr << "StreamHelpers::detail::read_vertex setting badbit." << std::endl;
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| 47 | is.clear(std::ios::badbit);
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| 48 | return is;
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| 49 | }
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| 50 | // read values into temp variables, then create a new GenVertex object
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| 51 | int identifier =0, id =0, num_orphans_in =0,
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| 52 | num_particles_out = 0, weights_size = 0;
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| 53 | double x = 0., y = 0., z = 0., t = 0.;
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| 54 | iline >> identifier ;
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| 55 | if(!iline) { throw IO_Exception("read_vertex input stream encounterd invalid data"); }
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| 56 | iline >> id ;
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| 57 | if(!iline) { throw IO_Exception("read_vertex input stream encounterd invalid data"); }
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| 58 | iline >> x ;
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| 59 | if(!iline) { throw IO_Exception("read_vertex input stream encounterd invalid data"); }
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| 60 | iline >> y ;
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| 61 | if(!iline) { throw IO_Exception("read_vertex input stream encounterd invalid data"); }
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| 62 | iline >> z ;
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| 63 | if(!iline) { throw IO_Exception("read_vertex input stream encounterd invalid data"); }
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| 64 | iline >> t;
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| 65 | if(!iline) { throw IO_Exception("read_vertex input stream encounterd invalid data"); }
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| 66 | iline >> num_orphans_in ;
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| 67 | if(!iline) { throw IO_Exception("read_vertex input stream encounterd invalid data"); }
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| 68 | iline >> num_particles_out ;
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| 69 | if(!iline) { throw IO_Exception("read_vertex input stream encounterd invalid data"); }
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| 70 | iline >> weights_size;
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| 71 | if(!iline) { throw IO_Exception("read_vertex input stream encounterd invalid data"); }
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| 72 | WeightContainer weights(weights_size);
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| 73 | for ( int i1 = 0; i1 < weights_size; ++i1 ) {
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| 74 | iline >> weights[i1];
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| 75 | if(!iline) { throw IO_Exception("read_vertex input stream encounterd invalid data"); }
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| 76 | }
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| 77 | v->set_position( FourVector(x,y,z,t) );
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| 78 | v->set_id( id );
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| 79 | v->weights() = weights;
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| 80 | v->suggest_barcode( identifier );
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| 81 | //
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| 82 | // read and create the associated particles. outgoing particles are
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| 83 | // added to their production vertices immediately, while incoming
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| 84 | // particles are added to a map and handled later.
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| 85 | for ( int i2 = 1; i2 <= num_orphans_in; ++i2 ) {
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| 86 | GenParticle* p1 = new GenParticle( );
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| 87 | detail::read_particle(is,particle_to_end_vertex,p1);
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| 88 | }
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| 89 | for ( int i3 = 1; i3 <= num_particles_out; ++i3 ) {
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| 90 | GenParticle* p2 = new GenParticle( );
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| 91 | detail::read_particle(is,particle_to_end_vertex,p2);
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| 92 | v->add_particle_out( p2 );
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| 93 | }
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| 94 |
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| 95 | return is;
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| 96 | }
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| 97 |
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| 98 | std::istream & find_event_end( std::istream & is ) {
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| 99 | // since there is no end of event flag,
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| 100 | // read one line at time until we find the next event
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| 101 | // or the end of event block
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| 102 | // don't throw until we find the end of the event
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| 103 | std::string line, firstc;
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| 104 | while ( is ) {
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| 105 | is >> firstc;
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| 106 | if( firstc=="E" ) { // next event
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| 107 | is.unget();
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| 108 | throw IO_Exception("input stream encountered invalid data");
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| 109 | return is;
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| 110 | } else if( firstc.size() > 1 ) { // no more events in this block
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| 111 | throw IO_Exception("input stream encountered invalid data, now at end of event block");
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| 112 | return is;
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| 113 | }
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| 114 | std::getline(is,line);
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| 115 | }
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| 116 | // the stream is bad
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| 117 | throw IO_Exception("input stream encountered invalid data, stream is now corrupt");
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| 118 | return is;
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| 119 | }
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| 120 |
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| 121 | } // detail
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| 122 |
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| 123 | } // HepMC
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