Import Geant4 10.6.0 source tree

source/analysis/g4tools/include/tools/hdf5/group_exists

@@ -0,0 +1,49 @@
+// Copyright (C) 2010, Guy Barrand. All rights reserved.
+// See the file tools.license for terms.
+
+#ifndef tools_hdf5_group_exists
+#define tools_hdf5_group_exists
+
+#include "hdf5_h"
+
+#include <string>
+
+namespace tools {
+namespace hdf5 {
+
+class group_exists_struct {
+public:
+  group_exists_struct(const std::string& a_what):m_what(a_what),m_found(false){}
+  virtual ~group_exists_struct() {}
+protected:
+  group_exists_struct(const group_exists_struct& a_from):m_what(a_from.m_what),m_found(a_from.m_found){}
+  group_exists_struct& operator=(const group_exists_struct&){return *this;}
+public:
+  std::string m_what;
+  bool m_found;
+};
+
+inline herr_t group_exists_visit(hid_t a_id,const char* a_name,void* a_tag){ //a_id = parent of a_name object.
+  group_exists_struct* visitor = (group_exists_struct*)a_tag;
+  H5G_stat_t statbuf;
+  ::H5Gget_objinfo(a_id,a_name,0,&statbuf);
+  switch(statbuf.type) {
+  case H5G_GROUP:{
+    if(a_name==visitor->m_what) {visitor->m_found=true;return 0;} //found
+    //::H5Giterate(a_id,a_name,NULL,group_exists_visit,visitor);
+  }break;
+  default:
+    break;
+  }
+  return 0;
+}
+
+inline bool group_exists(hid_t a_file_id,const std::string& a_name) {
+  group_exists_struct visitor(a_name);
+  ::H5Giterate(a_file_id,".",NULL,group_exists_visit,&visitor);
+  return visitor.m_found;  
+}
+
+}}
+
+#endif