* Archiving of GiNaC expressions. */
/*
- * GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2003 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
#include "ex.h"
+#include <iosfwd>
#include <string>
#include <vector>
+#include <map>
-class ostream;
-class istream;
-
-#ifndef NO_GINAC_NAMESPACE
namespace GiNaC {
-#endif // ndef NO_GINAC_NAMESPACE
-class lst;
class archive;
/** Numerical ID value to refer to an archive_node. */
-typedef unsigned int archive_node_id;
+typedef unsigned archive_node_id;
/** Numerical ID value to refer to a string. */
-typedef unsigned int archive_atom;
+typedef unsigned archive_atom;
/** This class stores all properties needed to record/retrieve the state
* addressed by its name and data type. */
class archive_node
{
- friend ostream &operator<<(ostream &os, const archive_node &ar);
- friend istream &operator>>(istream &is, archive_node &ar);
+ friend std::ostream &operator<<(std::ostream &os, const archive_node &ar);
+ friend std::istream &operator>>(std::istream &is, archive_node &ar);
public:
+ /** Property data types */
+ enum property_type {
+ PTYPE_BOOL,
+ PTYPE_UNSIGNED,
+ PTYPE_STRING,
+ PTYPE_NODE
+ };
+
+ /** Information about a stored property. A vector of these structures
+ * is returned by get_properties().
+ * @see get_properties */
+ struct property_info {
+ property_info() {}
+ property_info(property_type t, const std::string &n, unsigned c = 1) : type(t), name(n), count(c) {}
+
+ property_type type; /**< Data type of property. */
+ std::string name; /**< Name of property. */
+ unsigned count; /**< Number of occurrences. */
+ };
+ typedef std::vector<property_info> propinfovector;
+
+ archive_node() : a(*dummy_ar_creator()), has_expression(false) {} // hack for cint which always requires a default constructor
archive_node(archive &ar) : a(ar), has_expression(false) {}
archive_node(archive &ar, const ex &expr);
- ~archive_node() {}
- archive_node(const archive_node &other);
const archive_node &operator=(const archive_node &other);
- bool has_same_ex_as(const archive_node &other) const;
+ /** Add property of type "bool" to node. */
+ void add_bool(const std::string &name, bool value);
+
+ /** Add property of type "unsigned int" to node. */
+ void add_unsigned(const std::string &name, unsigned value);
+
+ /** Add property of type "string" to node. */
+ void add_string(const std::string &name, const std::string &value);
+
+ /** Add property of type "ex" to node. */
+ void add_ex(const std::string &name, const ex &value);
- void add_bool(const string &name, bool value);
- void add_unsigned(const string &name, unsigned int value);
- void add_string(const string &name, const string &value);
- void add_ex(const string &name, const ex &value);
+ /** Retrieve property of type "bool" from node.
+ * @return "true" if property was found, "false" otherwise */
+ bool find_bool(const std::string &name, bool &ret, unsigned index = 0) const;
- bool find_bool(const string &name, bool &ret) const;
- bool find_unsigned(const string &name, unsigned int &ret) const;
- bool find_string(const string &name, string &ret) const;
- bool find_ex(const string &name, ex &ret, const lst &sym_lst, unsigned int index = 0) const;
+ /** Retrieve property of type "unsigned" from node.
+ * @return "true" if property was found, "false" otherwise */
+ bool find_unsigned(const std::string &name, unsigned &ret, unsigned index = 0) const;
- ex unarchive(const lst &sym_lst) const;
+ /** Retrieve property of type "string" from node.
+ * @return "true" if property was found, "false" otherwise */
+ bool find_string(const std::string &name, std::string &ret, unsigned index = 0) const;
+
+ /** Retrieve property of type "ex" from node.
+ * @return "true" if property was found, "false" otherwise */
+ bool find_ex(const std::string &name, ex &ret, lst &sym_lst, unsigned index = 0) const;
+
+ /** Retrieve property of type "ex" from node, returning the node of
+ * the sub-expression. */
+ const archive_node &find_ex_node(const std::string &name, unsigned index = 0) const;
+
+ /** Return vector of properties stored in node. */
+ void get_properties(propinfovector &v) const;
+
+ ex unarchive(lst &sym_lst) const;
+ bool has_same_ex_as(const archive_node &other) const;
+ bool has_ex() const {return has_expression;}
+ ex get_ex() const {return e;}
- void forget(void);
- void printraw(ostream &os) const;
+ void forget();
+ void printraw(std::ostream &os) const;
private:
- /** Property data types */
- enum property_type {
- PTYPE_BOOL,
- PTYPE_UNSIGNED,
- PTYPE_STRING,
- PTYPE_NODE
- };
+ static archive* dummy_ar_creator();
/** Archived property (data type, name and associated data) */
struct property {
property() {}
- property(archive_atom n, property_type t, unsigned int v) : type(t), name(n), value(v) {}
- ~property() {}
-
- property(const property &other) : type(other.type), name(other.name), value(other.value) {}
- const property &operator=(const property &other);
+ property(archive_atom n, property_type t, unsigned v) : type(t), name(n), value(v) {}
- property_type type; /**< Data type of property. */
- archive_atom name; /**< Name of property. */
- unsigned int value; /**< Stored value. */
+ property_type type; /**< Data type of property. */
+ archive_atom name; /**< Name of property. */
+ unsigned value; /**< Stored value. */
};
/** Reference to the archive to which this node belongs. */
archive &a;
/** Vector of stored properties. */
- vector<property> props;
+
std::vector<property> props;
/** Flag indicating whether a cached unarchived representation of this node exists. */
mutable bool has_expression;
* of class basic (or a derived class). */
class archive
{
- friend ostream &operator<<(ostream &os, const archive &ar);
- friend istream &operator>>(istream &is, archive &ar);
+ friend std::ostream &operator<<(std::ostream &os, const archive &ar);
+ friend std::istream &operator>>(std::istream &is, archive &ar);
public:
archive() {}
/** Construct archive from expression using the specified name. */
archive(const ex &e, const char *n) {archive_ex(e, n);}
- archive_node_id add_node(const archive_node &n);
- archive_node &get_node(archive_node_id id);
-
+ /** Archive an expression.
+ * @param e the expression to be archived
+ * @param name name under which the expression is stored */
void archive_ex(const ex &e, const char *name);
+
+ /** Retrieve expression from archive by name.
+ * @param sym_lst list of pre-defined symbols */
ex unarchive_ex(const lst &sym_lst, const char *name) const;
- ex unarchive_ex(const lst &sym_lst, unsigned int index = 0) const;
- ex unarchive_ex(const lst &sym_lst, string &name, unsigned int index = 0) const;
- unsigned int num_expressions(void) const;
- void clear(void);
+ /** Retrieve expression from archive by index.
+ * @param sym_lst list of pre-defined symbols
+ * @see count_expressions */
+ ex unarchive_ex(const lst &sym_lst, unsigned index = 0) const;
+
+ /** Retrieve expression and its name from archive by index.
+ * @param sym_lst list of pre-defined symbols
+ * @param name receives the name of the expression
+ * @see count_expressions */
+ ex unarchive_ex(const lst &sym_lst, std::string &name, unsigned index = 0) const;
+
+ /** Return number of archived expressions. */
+ unsigned num_expressions() const;
+
+ /** Return reference to top node of an expression specified by index. */
+ const archive_node &get_top_node(unsigned index = 0) const;
- void forget(void);
- void printraw(ostream &os) const;
+ /** Clear all archived expressions. */
+ void clear();
+
+ archive_node_id add_node(const archive_node &n);
+ archive_node &get_node(archive_node_id id);
+
+ void forget();
+ void printraw(std::ostream &os) const;
private:
/** Vector of archived nodes. */
- vector<archive_node> nodes;
+
std::vector<archive_node> nodes;
/** Archived expression descriptor. */
struct archived_ex {
};
/** Vector of archived expression descriptors. */
- vector<archived_ex> exprs;
+
std::vector<archived_ex> exprs;
public:
- archive_atom atomize(const string &s) const;
- const string &unatomize(archive_atom id) const;
+ archive_atom atomize(const std::string &s) const;
+ const std::string &unatomize(archive_atom id) const;
private:
/** Vector of atomized strings (using a vector allows faster unarchiving). */
- mutable vector<string> atoms;
+ mutable std::vector<std::string> atoms;
+
+ /** Map of stored expressions to nodes for faster archiving */
+ typedef std::map<ex, archive_node_id, ex_is_less>::iterator mapit;
+ mutable std::map<ex, archive_node_id, ex_is_less> exprtable;
};
-ostream &operator<<(ostream &os, const archive &ar);
-istream &operator>>(istream &is, archive &ar);
+std::ostream &operator<<(std::ostream &os, const archive &ar);
+std::istream &operator>>(std::istream &is, archive &ar);
-#ifndef NO_GINAC_NAMESPACE
} // namespace GiNaC
-#endif // ndef NO_GINAC_NAMESPACE
#endif // ndef __GINAC_ARCHIVE_H__
git://www.ginac.de / ginac.git / blobdiff