Gabriele Cosmo
112 lines
2.6 KiB
Plaintext
112 lines
2.6 KiB
Plaintext
// Copyright (C) 2010, Guy Barrand. All rights reserved.
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// See the file tools.license for terms.
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#ifndef tools_rroot_tree_manip
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#define tools_rroot_tree_manip
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#include "file"
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#include "tree"
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#include "stl_vector"
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namespace tools {
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namespace rroot {
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inline tree* find_tree(file& a_file,ifac& a_fac,const std::string& a_name) {
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std::ostream& out = a_file.out();
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//out << "tools::rroot::find_tree : name : " << file << std::endl;
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key* key = a_file.dir().find_key(a_name);
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if(!key) {
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out << "tools::rroot::find_tree :"
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<< " key " << sout(a_name) << " not found."
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<< std::endl;
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return 0;
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}
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unsigned int sz;
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char* buf = key->get_object_buffer(sz); //we don't have ownership of buf.
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if(!buf) {
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out << "tools::rroot::find_tree :"
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<< " can't get data buffer of "
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<< sout(key->object_name()) << "."
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<< std::endl;
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return 0;
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}
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//out << "tools::rroot::find_tree :"
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// << " get data buffer size " << sz << "."
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// << std::endl;
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buffer b(out,key->file().byte_swap(),sz,buf,key->key_length(),false);
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if(key->object_class()!=TTree_cls()) {
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out << "tools::rroot::find_tree :"
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<< " key object class "
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<< sout(key->object_class())
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<< " is not a TTree."
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<< std::endl;
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return 0;
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}
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tree* _tree = new tree(a_file,a_fac);
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if(!_tree->stream(b)) {
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out << "tools::rroot::find_tree :"
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<< " TTree streaming failed"
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<< std::endl;
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delete _tree;
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return 0;
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}
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return _tree;
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}
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inline branch_element* find_be(tree& a_tree,const std::string& a_name){
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std::ostream& out = a_tree.file().out();
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branch* _branch = a_tree.find_branch(a_name,true);
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if(!_branch) {
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out << "tools::rroot::find_be :"
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<< " branch not found."
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<< std::endl;
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return 0;
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}
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branch_element* be = id_cast<branch,branch_element>(*_branch);
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if(!be) {
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out << "tools::rroot::find_be :"
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<< " branch not a branch_element."
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<< std::endl;
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return 0;
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}
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return be;
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}
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template <class T>
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inline stl_vector<T>* find_vec(branch_element& a_be,unsigned int a_event){
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std::ostream& out = a_be.file().out();
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unsigned int n;
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if(!a_be.find_entry(a_event,n)) {
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out << "tools::rroot::find_vec :"
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<< " find event failed."
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<< std::endl;
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return 0;
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}
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iro* o = a_be.object();
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stl_vector<T>* od = id_cast<iro, stl_vector<T> >(*o);
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if(!od) {
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out << "tools::rroot::find_vec :"
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<< " object not a tools::rroot::stl_vector<T>."
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<< std::endl;
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return 0;
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}
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return od; //WARNING : we are not owner.
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}
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}}
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#endif
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