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diff --git a/Utilities/DebugItem.cc b/Utilities/DebugItem.cc
new file mode 100644
--- /dev/null
+++ b/Utilities/DebugItem.cc
@@ -0,0 +1,71 @@
+// -*- C++ -*-
+//
+// This is the implementation of the non-inlined, non-templated member
+// functions of the DebugItem class.
+//
+
+#include "DebugItem.h"
+#include "ThePEG/Utilities/Debug.h"
+
+using namespace ThePEG;
+
+DebugItem::DebugItem(string itemname): debug(false) {
+ items()[itemname] = this;
+ map<string,long>::iterator it = nametics().find(itemname);
+ if ( it != nametics().end() ) {
+ if ( ticker() >= it->second ) debug = true;
+ else itemtics().insert(make_pair(it->second, this));
+ } else {
+ itemname = itemname.substr(0, itemname.rfind("::")) + "::all";
+ it = nametics().find(itemname);
+ if ( it != nametics().end() ) {
+ if ( ticker() >= it->second ) debug = true;
+ else itemtics().insert(make_pair(it->second, this));
+ }
+ }
+}
+
+void DebugItem::tic() {
+ ticker()++;
+ multimap<long,DebugItem*>::iterator it = itemtics().begin();
+ while ( it != itemtics().end() &&
+ ticker() >= it->first ) (it++)->second->debug = true;
+ itemtics().erase(itemtics().begin(), it);
+}
+
+void DebugItem::setDebugItem(string itemname, long after) {
+ nametics()[itemname] = after;
+ map<string,DebugItem*>::iterator it = items().find(itemname);
+ if ( it != items().end() ) {
+ if ( ticker() >= after ) it->second->debug = true;
+ else itemtics().insert(make_pair(after, it->second));
+ } else if ( itemname.substr(itemname.length() - 5) == "::all" ) {
+ itemname = itemname.substr(itemname.length() - 3);
+ for ( map<string,DebugItem*>::iterator it = items().begin();
+ it != items().end(); ++it )
+ if ( it->first.substr(0, itemname.length()) == itemname ) {
+ if ( ticker() >= after ) it->second->debug = true;
+ else itemtics().insert(make_pair(after, it->second));
+ }
+ }
+}
+
+long & DebugItem::ticker() {
+ static long tics = 0;
+ return tics;
+}
+
+map<string,DebugItem*> & DebugItem::items() {
+ static map<string,DebugItem*> itemmap;
+ return itemmap;
+}
+
+multimap<long,DebugItem*> & DebugItem::itemtics() {
+ static multimap<long,DebugItem*> itemmap;
+ return itemmap;
+}
+
+map<string,long> & DebugItem::nametics() {
+ static map<string,long> namemap;
+ return namemap;
+}
diff --git a/Utilities/DebugItem.h b/Utilities/DebugItem.h
new file mode 100644
--- /dev/null
+++ b/Utilities/DebugItem.h
@@ -0,0 +1,100 @@
+// -*- C++ -*-
+#ifndef ThePEG_DebugItem_H
+#define ThePEG_DebugItem_H
+//
+// This is the declaration of the DebugItem class.
+//
+
+#include "ThePEG/Config/ThePEG.h"
+
+namespace ThePEG {
+
+/**
+ * The DebugItem class can be used to efficiently handle detailed
+ * debug options. The actual objects are used anywhere in a function
+ * where optional debugging should be done. At that point a static
+ * object of DebugItem should be constructed giving a name to be used
+ * (it should be static to ensure that the initialization is only done
+ * once). After that the object is automatically cast to a bool
+ * indicating whether or not debugging has been requested for this
+ * item.
+ */
+class DebugItem {
+
+public:
+
+ /** @name Standard constructors and destructors. */
+ //@{
+ /**
+ * The only relevant constructor. The string should typically be on
+ * the form "namspace::class::function".
+ */
+ DebugItem(string itemname);
+ //@}
+
+public:
+
+ /**
+ * Switch on all DebugItem objects matching the given string. If \a
+ * after is positive delay the DebugItem until that number of tics.
+ */
+ static void setDebugItem(string itemname, long after = 0);
+
+ /**
+ * Advance one tic, opssibly switching on more debug items.
+ */
+ static void tic();
+
+ /**
+ * Cheap way of testing if debugging should be done.
+ */
+ operator bool () const {
+#ifndef ThePEG_NO_DEBUG
+ return debug;
+#else
+ return false;
+#endif
+ }
+
+private:
+
+ /**
+ * Set to true if debugging requested.
+ */
+ bool debug;
+
+ /**
+ * Counter for number of tics.
+ */
+ static long & ticker();
+
+ /**
+ * The DebugItem objects registered, indexed by their name.
+ */
+ static map<string,DebugItem*> & items();
+
+ /**
+ * The DebugItem objects registered, indexed by the tic at which
+ * they should be turned on..
+ */
+ static multimap<long,DebugItem*> & itemtics();
+
+ /**
+ * The DebugItem names registered together with the tic at which it
+ * should be turned on.
+ */
+ static map<string,long> & nametics();
+
+private:
+
+ /**
+ * The assignment operator is private and must never be called.
+ * In fact, it should not even be implemented.
+ */
+ DebugItem & operator=(const DebugItem &);
+
+};
+
+}
+
+#endif /* ThePEG_DebugItem_H */
diff --git a/Utilities/Makefile.am b/Utilities/Makefile.am
--- a/Utilities/Makefile.am
+++ b/Utilities/Makefile.am
@@ -1,30 +1,30 @@
mySOURCES = SimplePhaseSpace.cc Debug.cc DescriptionList.cc Maths.cc \
Direction.cc DynamicLoader.cc StringUtils.cc \
Exception.cc ClassDescription.cc CFileLineReader.cc \
- XSecStat.cc CFile.cc
+ XSecStat.cc CFile.cc DebugItem.cc
DOCFILES = ClassDescription.h ClassTraits.h Debug.h DescriptionList.h \
HoldFlag.h Interval.h Maths.h Rebinder.h Selector.h \
SimplePhaseSpace.h Triplet.h Direction.h UtilityBase.h \
TypeInfo.h DynamicLoader.h UnitIO.h EnumIO.h \
DIterator.h StringUtils.h Exception.h Named.h \
VSelector.h LoopGuard.h ObjectIndexer.h \
CFileLineReader.h CompSelector.h XSecStat.h Throw.h MaxCmp.h \
- Level.h Current.h CFile.h DescribeClass.h
+ Level.h Current.h CFile.h DescribeClass.h DebugItem.h
INCLUDEFILES = $(DOCFILES) ClassDescription.fh \
Interval.fh Interval.tcc Rebinder.fh \
Selector.tcc SimplePhaseSpace.tcc SimplePhaseSpace.xh \
Direction.xh UtilityBase.tcc \
Exception.fh VSelector.tcc CFileLineReader.fh
noinst_LTLIBRARIES = libThePEGUtilities.la
libThePEGUtilities_la_SOURCES = $(mySOURCES) $(INCLUDEFILES)
libThePEGUtilities_la_CPPFLAGS = $(AM_CPPFLAGS) \
-DTHEPEG_PKGLIBDIR="\"$(pkglibdir)\""
include $(top_srcdir)/Config/Makefile.aminclude

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