Univariate Hensel lifting now uses upoly.

[ginac.git] / ginac / archive.cpp

diff --git a/ginac/archive.cpp b/ginac/archive.cpp
index e08aaafb0713cf634106aab0acd48acf5e45d7a3..1d65c7a9ec22f609dfefd62d8a64f919353e0aa5 100644 (file)
--- a/ginac/archive.cpp
+++ b/ginac/archive.cpp
@@ -3,7 +3,7 @@
  *  Archiving of GiNaC expressions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2007 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2008 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -516,6 +516,12 @@ void archive_node::get_properties(propinfovector &v) const
        }       
 }
 
+static synthesize_func find_factory_fcn(const std::string& name)
+{
+       static unarchive_table_t the_table;
+       synthesize_func ret = the_table.find(name);
+       return ret;
+}
 
 /** Convert archive node to GiNaC expression. */
 ex archive_node::unarchive(lst &sym_lst) const
@@ -528,14 +534,50 @@ ex archive_node::unarchive(lst &sym_lst) const
        std::string class_name;
        if (!find_string("class", class_name))
                throw (std::runtime_error("archive node contains no class name"));
-       unarch_func f = find_unarch_func(class_name);
 
        // Call instantiation function
-       e = f(*this, sym_lst);
+       synthesize_func factory_fcn = find_factory_fcn(class_name);
+       ptr<basic> obj(factory_fcn());
+       obj->setflag(status_flags::dynallocated);
+       obj->read_archive(*this, sym_lst);
+       e = ex(*obj);
        has_expression = true;
        return e;
 }
 
+int unarchive_table_t::usecount = 0;
+unarchive_map_t* unarchive_table_t::unarch_map = 0;
+
+unarchive_table_t::unarchive_table_t()
+{
+       if (usecount == 0)
+               unarch_map = new unarchive_map_t();
+       ++usecount;
+}
+
+synthesize_func unarchive_table_t::find(const std::string& classname) const
+{
+       unarchive_map_t::const_iterator i = unarch_map->find(classname);
+       if (i != unarch_map->end())
+               return i->second;
+       throw std::runtime_error(std::string("no unarchiving function for \"")
+                       + classname + "\" class");
+}
+
+void unarchive_table_t::insert(const std::string& classname, synthesize_func f)
+{
+       if (unarch_map->find(classname) != unarch_map->end())
+               throw std::runtime_error(std::string("Class \"" + classname
+                                       + "\" is already registered"));
+       unarch_map->operator[](classname) = f;
+}
+
+unarchive_table_t::~unarchive_table_t()
+{
+       if (--usecount == 0)
+               delete unarch_map;
+}
+
 
 void archive::clear()
 {